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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

(Mark One)

x			QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2022

OR

o			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from:             to             

Commission File Number: 001-33723

Main Street Capital Corporation

(Exact name of registrant as specified in its charter)

Maryland			41-2230745
(State or other jurisdiction of incorporation or organization)			(I.R.S. Employer Identification No.)
1300 Post Oak Boulevard, 8th Floor Houston, TX			77056
(Address of principal executive offices)			(Zip Code)

(713) 350-6000

(Registrant’s telephone number including area code)

n/a

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class

Trading Symbol

Name of Each Exchange on Which Registered

Common Stock, par value $0.01 per share

MAIN

New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No o

Indicate by check mark whether the registrant has submitted electronically every

Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer

x

Accelerated filer

o

Non-accelerated filer

o

Smaller reporting company

o

Emerging growth company

o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No x

The number of shares outstanding of the issuer’s common stock as of November 3, 2022 was 77,253,793.

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TABLE OF CONTENTS

			PART I
			FINANCIAL INFORMATION
Item 1.			Consolidated Financial Statements
			Consolidated Balance Sheets—September 30, 2022 (unaudited) and December 31, 2021			1
			Consolidated Statements of Operations (unaudited)—Three and nine months ended September 30, 2022 and 2021			2
			Consolidated Statements of Changes in Net Assets (unaudited)—Nine months ended September 30, 2022 and 2021			3
			Consolidated Statements of Cash Flows (unaudited)—Nine months ended September 30, 2022 and 2021			4
			Consolidated Schedule of Investments (unaudited)—September 30, 2022			5
			Consolidated Schedule of Investments—December 31, 2021			35
			Notes to Consolidated Financial Statements (unaudited)			61
			Consolidated Schedules of Investments in and Advances to Affiliates (unaudited)—Nine months ended September 30, 2022 and 2021			100
Item 2.			Management’s Discussion and Analysis of Financial Condition and Results of Operations			115
Item 3.			Quantitative and Qualitative Disclosures about Market Risk			135
Item 4.			Controls and Procedures			136
			PART II
			OTHER INFORMATION
Item 1.			Legal Proceedings			137
Item 1A.			Risk Factors			137
Item 2.			Unregistered Sales of Equity Securities and Use of Proceeds			137
Item 6			Exhibits			138
			Signatures			139

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MAIN STREET CAPITAL CORPORATION

Consolidated Balance Sheets

(in thousands, except shares and per share amounts)

			September 30, 2022						December 31, 2021
			(Unaudited)
ASSETS
Investments at fair value:
Control investments (cost: $1,199,446 and $1,107,597 as of September 30, 2022 and December 31, 2021, respectively)			$	1,599,429					$	1,489,257
Affiliate investments (cost: $576,047 and $578,539 as of September 30, 2022 and December 31, 2021, respectively)			552,581						549,214
Non‑Control/Non‑Affiliate investments (cost: $1,914,134 and $1,573,110 as of September 30, 2022 and December 31, 2021, respectively)			1,821,480						1,523,360
Total investments (cost: $3,689,627 and $3,259,246 as of September 30, 2022 and December 31, 2021, respectively)			3,973,490						3,561,831
Cash and cash equivalents			61,158						32,629
Interest and dividend receivable and other assets			74,283						56,488
Receivable for securities sold			20,929						35,125
Deferred financing costs (net of accumulated amortization of $10,203 and $9,462 as of September 30, 2022 and December 31, 2021, respectively)			5,106						4,217
Total assets			$	4,134,966					$	3,690,290
LIABILITIES
Credit facility			$	561,000					$	320,000
3.00% Notes due 2026 (par: $500,000 as of both September 30, 2022 and December 31, 2021)			498,004						497,609
5.20% Notes due 2024 (par: $450,000 as of both September 30, 2022 and December 31, 2021)			450,863						451,272
SBIC debentures (par: $350,000 ($16,000 due within one year) as of both September 30, 2022 and December 31, 2021)			343,618						342,731
4.50% Notes due 2022 (par: $185,000 as of both September 30, 2022 and December 31, 2021)			184,899						184,444
Accounts payable and other liabilities			40,158						40,469
Payable for securities purchased			—						5,111
Interest payable			16,673						14,926
Dividend payable			16,789						15,159
Deferred tax liability, net			43,542						29,723
Total liabilities			2,155,546						1,901,444
Commitments and contingencies (Note K)
NET ASSETS
Common stock, $0.01 par value per share (150,000,000 shares authorized; 76,155,807 and 70,700,885 shares issued and outstanding as of September 30, 2022 and December 31, 2021, respectively)			763						707
Additional paid‑in capital			1,952,992						1,736,346
Total undistributed earnings			25,665						51,793
Total net assets			1,979,420						1,788,846
Total liabilities and net assets			$	4,134,966					$	3,690,290
NET ASSET VALUE PER SHARE			$	25.94					$	25.29

The accompanying notes are an integral part of these consolidated financial statements

1

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MAIN STREET CAPITAL CORPORATION

Consolidated Statements of Operations

(in thousands, except shares and per share amounts)

(Unaudited)

			Three Months Ended September 30,												Nine Months Ended September 30,
			2022						2021						2022						2021
INVESTMENT INCOME:
Interest, fee and dividend income:
Control investments			$	41,367					$	34,852					$	110,751					$	85,904
Affiliate investments			12,490						12,274						38,300						34,785
Non‑Control/Non‑Affiliate investments			44,530						29,653						113,930						86,192
Total investment income			98,387						76,779						262,981						206,881
EXPENSES:
Interest			(21,234)						(14,711)						(55,216)						(42,914)
Compensation			(10,404)						(9,576)						(26,480)						(22,790)
General and administrative			(4,018)						(3,047)						(11,483)						(9,439)
Share‑based compensation			(3,617)						(2,869)						(10,031)						(7,961)
Expenses allocated to the External Investment Manager			3,334						2,728						9,613						7,680
Total expenses			(35,939)						(27,475)						(93,597)						(75,424)
NET INVESTMENT INCOME			62,448						49,304						169,384						131,457
NET REALIZED GAIN (LOSS):
Control investments			(5,822)						8,786						(5,822)						(4,459)
Affiliate investments			601						(5,147)						1,340						3,962
Non‑Control/Non‑Affiliate investments			10,252						4,666						7,784						11,072
Total net realized gain			5,031						8,305						3,302						10,575
NET UNREALIZED APPRECIATION (DEPRECIATION):
Control investments			7,517						20,671						20,618						65,756
Affiliate investments			(1,069)						14,285						3,703						30,518
Non‑Control/Non‑Affiliate investments			(16,529)						3,675						(44,243)						20,798
Total net unrealized appreciation (depreciation)			(10,081)						38,631						(19,922)						117,072
INCOME TAXES:
Federal and state income, excise and other taxes			(1,540)						(953)						(3,658)						(2,242)
Deferred taxes			(520)						(11,331)						(13,819)						(20,449)
Income tax provision			(2,060)						(12,284)						(17,477)						(22,691)
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS			$	55,338					$	83,956					$	135,287					$	236,413
NET INVESTMENT INCOME PER SHARE—BASIC AND DILUTED			$	0.83					$	0.71					$	2.31					$	1.92
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS PER SHARE—BASIC AND DILUTED			$	0.74					$	1.22					$	1.84					$	3.45
WEIGHTED AVERAGE SHARES OUTSTANDING—BASIC AND DILUTED			75,036,522						69,021,826						73,363,281						68,557,362

The accompanying notes are an integral part of these consolidated financial statements

2

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MAIN STREET CAPITAL CORPORATION

Consolidated Statements of Changes in Net Assets

(in thousands, except shares)

(Unaudited)

			Common Stock												Additional Paid-In Capital						Total Undistributed (Overdistributed) Earnings						Total Net Asset Value
			Number of Shares						Par Value
Balances at December 31, 2020			67,762,032						$	677					$	1,615,940					$	(101,850)					$	1,514,767
Public offering of common stock, net of offering costs			117,388						2						3,626						—						3,628
Share‑based compensation			—						—						2,333						—						2,333
Purchase of vested stock for employee payroll tax withholding			(180)						—						(7)						—						(7)
Dividend reinvestment			106,651						1						3,698						—						3,699
Amortization of directors’ deferred compensation			—						—						195						—						195
Issuance of restricted stock			15,007						—						—						—						—
Dividends to stockholders			—						—						96						(41,893)						(41,797)
Net increase resulting from operations			—						—						—						57,346						57,346
Balances at March 31, 2021			68,000,898						$	680					$	1,625,881					$	(86,397)					$	1,540,164
Public offering of common stock, net of offering costs			231,795						2						9,396						—						9,398
Share‑based compensation			—						—						2,759						—						2,759
Purchase of vested stock for employee payroll tax withholding			(114,357)						(1)						(4,464)						—						(4,465)
Dividend reinvestment			91,632						1						3,755						—						3,756
Amortization of directors’ deferred compensation			—						—						163						—						163
Issuance of restricted stock, net of forfeited shares			321,821						3						(3)						—						—
Dividends to stockholders			—						—						96						(42,140)						(42,044)
Net increase resulting from operations			—						—						—						95,110						95,110
Balances at June 30, 2021			68,531,789						$	685					$	1,637,583					$	(33,427)					$	1,604,841
Public offering of common stock, net of offering costs			772,274						8						31,812						—						31,820
Share‑based compensation			—						—						2,869						—						2,869
Purchase of vested stock for employee payroll tax withholding			(13,818)						—						(575)						—						(575)
Dividend reinvestment			95,364						1						3,984						—						3,985
Amortization of directors’ deferred compensation			—						—						147						—						147
Issuance of restricted stock, net of forfeited shares			23,036						—						—						—						—
Dividends to stockholders			—						—						97						(42,833)						(42,736)
Net increase resulting from operations			—						—						—						83,956						83,956
Balances at September 30, 2021			69,408,645						$	694					$	1,675,917					$	7,696					$	1,684,307
Balances at December 31, 2021			70,737,021						$	707					$	1,736,346					$	51,793					$	1,788,846
Public offering of common stock, net of offering costs			1,502,430						15						63,507						—						63,522
Share‑based compensation			—						—						2,818						—						2,818
Dividend reinvestment			114,043						1						4,812						—						4,813
Amortization of directors’ deferred compensation			—						—						147						—						147
Issuance of restricted stock, net of forfeited shares			16,913						—						—						—						—
Dividends to stockholders			—						—						109						(51,804)						(51,695)
Net increase resulting from operations			—						—						—						65,203						65,203
Balances at March 31, 2022			72,370,407						$	723					$	1,807,739					$	65,192					$	1,873,654
Public offering of common stock, net of offering costs			662,828						7						25,626						—						25,633
Share‑based compensation			—						—						3,596						—						3,596
Purchase of vested stock for employee payroll tax withholding			(115,071)						(1)						(4,894)						—						(4,895)
Dividend reinvestment			132,156						1						4,999						—						5,000
Amortization of directors’ deferred compensation			—						—						130						—						130
Issuance of restricted stock, net of forfeited shares			467,238						5						(5)						—						—
Dividends to stockholders			—						—						114						(52,818)						(52,704)
Net increase resulting from operations			—						—						—						14,749						14,749
Balances at June 30, 2022			73,517,558						$	735					$	1,837,305					$	27,123					$	1,865,163
Public offering of common stock, net of offering costs			2,618,225						26						105,323						—						105,349
Share‑based compensation			—						—						3,617						—						3,617
Purchase of vested stock for employee payroll tax withholding			(1,106)						—						(48)						—						(48)
Dividend reinvestment			164,216						2						6,555						—						6,557
Amortization of directors’ deferred compensation			—						—						121						—						121
Issuance of restricted stock, net of forfeited shares			9,937						—						—						—						—
Dividends to stockholders			—						—						119						(56,796)						(56,677)
Net increase resulting from operations			—						—						—						55,338						55,338
Balances at September 30, 2022			76,308,830						$	763					$	1,952,992					$	25,665					$	1,979,420

The accompanying notes are an integral part of these consolidated financial statements

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MAIN STREET CAPITAL CORPORATION

Consolidated Statements of Cash Flows

(in thousands)

(Unaudited)

			Nine Months Ended September 30,
			2022						2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net increase in net assets resulting from operations			$	135,287					$	236,413
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Investments in portfolio companies			(911,273)						(911,095)
Proceeds from sales and repayments of debt investments in portfolio companies			441,860						530,964
Proceeds from sales and return of capital of equity investments in portfolio companies			64,161						83,376
Net unrealized (appreciation) depreciation			19,922						(117,072)
Net realized gain			(3,302)						(10,575)
Accretion of unearned income			(9,908)						(10,972)
Payment-in-kind interest			(3,511)						(6,280)
Cumulative dividends			(1,390)						(1,296)
Share-based compensation expense			10,031						7,961
Amortization of deferred financing costs			2,068						2,277
Deferred tax provision			13,819						20,449
Changes in other assets and liabilities:
Interest and dividend receivable and other assets			(18,984)						(669)
Interest payable			1,747						6,645
Accounts payable and other liabilities			199						7,576
Deferred fees and other			1,946						3,586
Net cash used in operating activities			(257,328)						(158,712)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from public offering of common stock, net of offering costs			194,504						44,846
Proceeds from public offering of 3.00% Notes due 2026			—						300,000
Dividends paid			(143,075)						(114,471)
Proceeds from issuance of SBIC debentures			—						80,200
Repayments of SBIC debentures			—						(40,000)
Proceeds from credit facility			730,000						645,000
Repayments on credit facility			(489,000)						(714,000)
Debt issuance costs, net			(1,629)						(10,166)
Purchases of vested stock for employee payroll tax withholding			(4,943)						(5,047)
Net cash provided by financing activities			285,857						186,362
			—
Net increase in cash and cash equivalents			28,529						27,650
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD			32,629						31,919
CASH AND CASH EQUIVALENTS AT END OF PERIOD			$	61,158					$	59,569
Supplemental cash flow disclosures:
Interest paid			$	51,306					$	33,898
Taxes paid			$	4,896					$	2,046
Non-cash financing activities:
Value of shares issued pursuant to the DRIP			$	16,370					$	11,440

The accompanying notes are an integral part of these consolidated financial statements

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Control Investments (5)
Analytical Systems Keco Holdings, LLC						Manufacturer of Liquid and Gas Analyzers
									Secured Debt			(9) (25)			8/16/2019									L +			10.00%						8/16/2024			$	—		$	(3)		$	(3)
									Secured Debt			(9)			8/16/2019						12.63%			L +			10.00%						8/16/2024			4,735			4,595			4,595
									Preferred Member Units						8/16/2019			3,200			12.63%																		3,200			—
									Preferred Member Units						5/20/2021			2,427																					2,427			3,844
									Warrants			(27)			8/16/2019			420															8/16/2029						316			—
																																							10,535			8,436
ASC Interests, LLC						Recreational and Educational Shooting Facility
									Secured Debt						12/31/2019						13.00%												7/31/2024			300			300			300
									Secured Debt						8/1/2013						13.00%												7/31/2024			1,650			1,648			1,648
									Member Units						8/1/2013			1,500																					1,500			800
																																							3,448			2,748
ATS Workholding, LLC			(10)			Manufacturer of Machine Cutting Tools and Accessories
									Secured Debt			(14)			11/16/2017						5.00%												8/16/2023			1,859			1,859			800
									Secured Debt			(14)			11/16/2017						5.00%												8/16/2023			3,015			2,857			1,298
									Preferred Member Units						11/16/2017			3,725,862																					3,726			—
																																							8,442			2,098
Barfly Ventures, LLC			(10)			Casual Restaurant Group
									Secured Debt						10/15/2020						7.00%												10/31/2024			711			711			711
									Member Units						10/26/2020			37																					1,584			3,320
																																							2,295			4,031
Batjer TopCo, LLC						HVAC Mechanical Contractor
									Secured Debt			(25)			3/7/2022																		3/31/2027			—			(8)			(8)
									Secured Debt						3/7/2022						11.00%												3/31/2027			11,025			10,927			10,927
									Preferred Stock						3/7/2022			4,073																					4,095			4,095
																																							15,014			15,014
Bolder Panther Group, LLC						Consumer Goods and Fuel Retailer
									Secured Debt			(9) (25)			12/31/2020									L +			8.00%						12/31/2025			—			—			—
									Secured Debt			(9)			12/31/2020						12.63%			L +			10.00%						12/31/2025			99,194			98,615			99,194
									Class B Preferred Member Units			(8)			12/31/2020			140,000			8.00%																		14,000			27,010
																																							112,615			126,204
Brewer Crane Holdings, LLC						Provider of Crane Rental and Operating Services
									Secured Debt			(9)			1/9/2018						12.56%			L +			10.00%						1/9/2023			6,088			6,084			6,084
									Preferred Member Units			(8)			1/9/2018			2,950																					4,280			5,670
																																							10,364			11,754
Bridge Capital Solutions Corporation						Financial Services and Cash Flow Solutions Provider
									Secured Debt						7/25/2016						13.00%												12/11/2024			8,813			8,813			8,813

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Secured Debt			(30)			7/25/2016						13.00%												12/11/2024			1,000			1,000			1,000
									Preferred Member Units			(8) (30)			7/25/2016			17,742																					1,000			1,000
									Warrants			(27)			7/25/2016			82															7/25/2026						2,132			4,260
																																							12,945			15,073
Café Brazil, LLC						Casual Restaurant Group
									Member Units			(8)			6/9/2006			1,233																					1,742			2,370
California Splendor Holdings LLC						Processor of Frozen Fruits
									Secured Debt			(9)			3/30/2018						12.38%			L +			10.00%						7/29/2026			28,000			27,948			28,000
									Preferred Member Units			(8)			3/30/2018			6,157																					10,775			21,025
									Preferred Member Units			(8)			7/31/2019			3,671			15.00%									15.00%									3,853			3,853
																																							42,576			52,878
CBT Nuggets, LLC						Produces and Sells IT Training Certification Videos
									Member Units			(8)			6/1/2006			416																					1,300			48,250
Centre Technologies Holdings, LLC						Provider of IT Hardware Services and Software Solutions
									Secured Debt			(9) (25)			1/4/2019									L +			9.00%						1/4/2026			—			—			—
									Secured Debt			(9)			1/4/2019						11.63%			L +			9.00%						1/4/2026			15,030			14,947			14,947
									Preferred Member Units						1/4/2019			13,309																					6,122			8,160
																																							21,069			23,107
Chamberlin Holding LLC						Roofing and Waterproofing Specialty Contractor
									Secured Debt			(9) (25)			2/26/2018									L +			6.00%						2/26/2023			—			—			—
									Secured Debt			(9)			2/26/2018						10.63%			L +			8.00%						2/26/2023			17,466			17,438			17,466
									Member Units			(8)			2/26/2018			4,347																					11,440			22,330
									Member Units			(8) (30)			11/2/2018			1,047,146																					1,773			1,991
																																							30,651			41,787
Charps, LLC						Pipeline Maintenance and Construction
									Unsecured Debt						8/26/2020						10.00%												1/31/2026			5,694			4,635			5,694
									Preferred Member Units			(8)			2/3/2017			1,829																					1,963			13,210
																																							6,598			18,904
Clad-Rex Steel, LLC						Specialty Manufacturer of Vinyl-Clad Metal
									Secured Debt			(9)			12/20/2016						12.13%			L +			9.50%						1/15/2024			10,480			10,430			10,430
									Secured Debt						12/20/2016						10.00%												12/20/2036			1,057			1,047			1,047
									Member Units			(8)			12/20/2016			717																					7,280			9,490
									Member Units			(30)			12/20/2016			800																					210			610
																																							18,967			21,577
CMS Minerals Investments						Oil & Gas Exploration & Production

6

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Member Units			(8) (30)			4/1/2016			100																					1,423			1,890
Cody Pools, Inc.						Designer of Residential and Commercial Pools
									Secured Debt			(9) (25)			3/6/2020									L +			10.50%						12/17/2026			—			(11)			(11)
									Secured Debt			(9)			3/6/2020						13.63%			L +			10.50%						12/17/2026			41,225			40,924			41,225
									Preferred Member Units			(8) (30)			3/6/2020			587																					8,317			57,210
																																							49,230			98,424
Colonial Electric Company LLC						Provider of Electrical Contracting Services
									Secured Debt			(25)			3/31/2021																		3/31/2026			—			—			—
									Secured Debt						3/31/2021						12.00%												3/31/2026			23,625			23,451			23,451
									Preferred Member Units			(8)			3/31/2021			17,280																					7,680			9,210
																																							31,131			32,661
CompareNetworks Topco, LLC						Internet Publishing and Web Search Portals
									Secured Debt			(9)			1/29/2019						11.63%			L +			9.00%						1/29/2024			5,350			5,339			5,350
									Preferred Member Units			(8)			1/29/2019			1,975																					1,975			18,570
																																							7,314			23,920
Copper Trail Fund Investments			(12) (13)			Investment Partnership
									LP Interests (CTMH, LP)			(31)			7/17/2017			38.75%																					710			710
Datacom, LLC						Technology and Telecommunications Provider
									Secured Debt						3/1/2022						7.50%												12/31/2025			223			223			223
									Secured Debt						3/31/2021						7.50%												12/31/2025			8,690			8,217			7,749
									Preferred Member Units			(8)			3/31/2021			9,000																					2,610			2,670
																																							11,050			10,642
Digital Products Holdings LLC						Designer and Distributor of Consumer Electronics
									Secured Debt			(9)			4/1/2018						12.63%			L +			10.00%						4/1/2023			15,863			15,844			15,844
									Preferred Member Units			(8)			4/1/2018			3,857																					9,501			9,835
																																							25,345			25,679
Direct Marketing Solutions, Inc.						Provider of Omni-Channel Direct Marketing Services
									Secured Debt			(9)			2/13/2018						13.63%			L +			11.00%						2/13/2024			3,400			3,386			3,400
									Secured Debt			(9)			2/13/2018						13.63%			L +			11.00%						2/13/2024			23,050			22,966			23,050
									Preferred Stock			(8)			2/13/2018			8,400																					8,400			22,220
																																							34,752			48,670
Flame King Holdings, LLC						Propane Tank and Accessories Distributor
									Secured Debt			(9)			10/29/2021						9.25%			L +			6.50%						10/31/2026			7,600			7,536			7,600

7

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Secured Debt			(9)			10/29/2021						13.75%			L +			11.00%						10/31/2026			21,200			21,027			21,200
									Preferred Equity			(8)			10/29/2021			9,360																					10,400			13,840
																																							38,963			42,640
Gamber-Johnson Holdings, LLC						Manufacturer of Ruggedized Computer Mounting Systems
									Secured Debt			(9) (25)			6/24/2016									L +			8.00%						1/1/2025			—			—			—
									Secured Debt			(9)			6/24/2016						10.63%			L +			8.00%						1/1/2025			24,078			24,019			24,078
									Member Units			(8)			6/24/2016			9,042																					17,692			46,470
																																							41,711			70,548
Garreco, LLC						Manufacturer and Supplier of Dental Products
									Secured Debt			(9) (37)			7/15/2013						9.50%			L +			8.00%						7/31/2023			3,826			3,826			3,826
									Member Units			(8)			7/15/2013			1,200																					1,200			1,990
																																							5,026			5,816
GRT Rubber Technologies LLC						Manufacturer of Engineered Rubber Products
									Secured Debt						12/19/2014						10.56%			L +			8.00%						10/29/2026			40,493			40,301			40,493
									Member Units			(8)			12/19/2014			5,879																					13,065			46,190
																																							53,366			86,683
Gulf Manufacturing, LLC						Manufacturer of Specialty Fabricated Industrial Piping Products
									Member Units			(8)			8/31/2007			438																					2,980			5,810
Gulf Publishing Holdings, LLC						Energy Industry Focused Media and Publishing
									Secured Debt			(9) (25)			9/29/2017									L +			9.50%						7/1/2027			—			—			—
									Secured Debt						7/1/2022						12.50%												6/30/2027			2,400			2,400			2,284
									Member Units						4/29/2016			3,681																					3,681			—
									Member Units						7/1/2022			63,720																					5,600			3,920
																																							11,681			6,204
Harris Preston Fund Investments			(12) (13)			Investment Partnership
									LP Interests (2717 MH, L.P.)			(31)			10/1/2017			49.26%																					3,895			7,142
									LP Interests (2717 HPP-MS, L.P.)			(31)			3/11/2022			49.26%																					244			244
																																							4,139			7,386
Harrison Hydra-Gen, Ltd.						Manufacturer of Hydraulic Generators
									Common Stock						6/4/2010			107,456																					718			3,280
Jensen Jewelers of Idaho, LLC						Retail Jewelry Store
									Secured Debt			(9)			11/14/2006						12.25%			P +			6.75%						11/14/2023			2,450			2,442			2,450

8

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Member Units			(8)			11/14/2006			627																					811			14,970
																																							3,253			17,420
Johnson Downie Opco, LLC						Executive Search Services
									Secured Debt			(9) (25)			12/10/2021									L +			11.50%						12/10/2026			—			(15)			(15)
									Secured Debt			(9)			12/10/2021						14.13%			L +			11.50%						12/10/2026			9,999			9,915			9,999
									Preferred Equity			(8)			12/10/2021			3,150																					3,150			5,880
																																							13,050			15,864
JorVet Holdings, LLC						Supplier and Distributor of Veterinary Equipment and Supplies
									Secured Debt						3/28/2022						12.00%												3/28/2027			25,650			25,419			25,419
									Common Stock			(8)			3/28/2022			107,406																					10,741			10,741
																																							36,160			36,160
KBK Industries, LLC						Manufacturer of Specialty Oilfield and Industrial Products
									Member Units			(8)			1/23/2006			325																					783			14,390
Kickhaefer Manufacturing Company, LLC						Precision Metal Parts Manufacturing
									Secured Debt						10/31/2018						11.50%												10/31/2023			20,415			20,361			20,361
									Secured Debt						10/31/2018						9.00%												10/31/2048			3,888			3,851			3,851
									Member Units						10/31/2018			581																					12,240			9,250
									Member Units			(8) (30)			10/31/2018			800																					992			2,460
																																							37,444			35,922
Market Force Information, LLC						Provider of Customer Experience Management Services
									Secured Debt			(9)			7/28/2017						13.38%			L +			11.00%						7/28/2023			5,000			5,000			5,000
									Secured Debt			(14)			7/28/2017						12.00%									12.00%			7/28/2023			26,079			25,952			2,871
									Member Units						7/28/2017			743,921																					16,642			—
																																							47,594			7,871
MH Corbin Holding LLC						Manufacturer and Distributor of Traffic Safety Products
									Secured Debt						8/31/2015						13.00%												12/31/2022			6,236			6,236			2,709
									Preferred Member Units						3/15/2019			66,000																					4,400			—
									Preferred Member Units						9/1/2015			4,000																					6,000			—
																																							16,636			2,709
MS Private Loan Fund I, LP			(12) (13)			Investment Partnership
									Secured Debt			(25)			1/26/2021																		12/31/2024			—			—			—
									LP Interests			(8) (31)			1/26/2021			14.51%																					14,250			14,351
																																							14,250			14,351
MSC Adviser I, LLC			(16)			Third Party Investment Advisory Services
									Member Units			(8)			11/22/2013			1																					29,500			112,490

9

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
MSC Income Fund, Inc.			(12) (13)			Business Development Company
									Common Equity			(8)			5/2/2022			94,697																					750			761
Mystic Logistics Holdings, LLC						Logistics and Distribution Services Provider for Large Volume Mailers
									Secured Debt			(25)			8/18/2014																		1/31/2024			—			—			—
									Secured Debt						8/18/2014						10.00%												1/31/2024			5,746			5,746			5,746
									Common Stock			(8)			8/18/2014			5,873																					2,720			20,700
																																							8,466			26,446
NAPCO Precast, LLC						Precast Concrete Manufacturing
									Member Units						1/31/2008			2,955																					2,975			11,180
Nebraska Vet AcquireCo, LLC						Mixed-Animal Veterinary and Animal Health Product Provider
									Secured Debt						12/31/2020						12.00%												12/31/2025			18,281			18,160			18,281
									Secured Debt						12/31/2020						12.00%												12/31/2025			10,500			10,429			10,500
									Preferred Member Units						12/31/2020			6,987																					6,987			7,700
																																							35,576			36,481
NexRev LLC						Provider of Energy Efficiency Products & Services
									Secured Debt						2/28/2018						11.00%												2/28/2025			160			160			160
									Secured Debt						2/28/2018						11.00%												2/28/2025			12,265			12,110			9,053
									Preferred Member Units			(8)			2/28/2018			103,144,186																					8,213			1,110
																																							20,483			10,323
NRP Jones, LLC						Manufacturer of Hoses, Fittings and Assemblies
									Secured Debt						12/21/2017						12.00%												3/20/2023			2,080			2,080			2,080
									Member Units			(8)			12/22/2011			65,962																					3,717			4,790
																																							5,797			6,870
NuStep, LLC						Designer, Manufacturer and Distributor of Fitness Equipment
									Secured Debt			(9)			1/31/2017						9.13%			L +			6.50%						1/31/2025			4,400			4,399			4,399
									Secured Debt						1/31/2017						12.00%												1/31/2025			18,440			18,411			18,411
									Preferred Member Units						1/31/2017			406																					10,200			10,200
																																							33,010			33,010
OMi Topco, LLC						Manufacturer of Overhead Cranes
									Secured Debt						8/31/2021						12.00%												8/31/2026			16,250			16,122			16,250
									Preferred Member Units			(8)			4/1/2008			900																					1,080			20,680
																																							17,202			36,930
Orttech Holdings, LLC						Distributor of Industrial Clutches, Brakes and Other Components
									Secured Debt			(9) (25)			7/30/2021									L +			11.00%						7/31/2026			—			—			—
									Secured Debt			(9)			7/30/2021						13.63%			L +			11.00%						7/31/2026			23,600			23,417			23,417

10

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Preferred Stock			(8) (30)			7/30/2021			10,000																					10,000			10,000
																																							33,417			33,417
Pearl Meyer Topco LLC						Provider of Executive Compensation Consulting Services
									Secured Debt			(25)			4/27/2020																		4/27/2025			—			—			—
									Secured Debt						4/27/2020						12.00%												4/27/2025			28,681			28,521			28,681
									Member Units			(8)			4/27/2020			13,800																					13,000			41,820
																																							41,521			70,501
PPL RVs, Inc.						Recreational Vehicle Dealer
									Secured Debt			(9) (25)			10/31/2019									L +			7.00%						11/15/2027			—			(9)			(9)
									Secured Debt			(9)			11/15/2016						8.75%			L +			7.00%						11/15/2027			19,655			19,416			19,655
									Common Stock			(8)			6/10/2010			2,000																					2,150			19,510
									Common Stock						6/14/2022			156,574																					157			157
																																							21,714			39,313
Principle Environmental, LLC						Noise Abatement Service Provider
									Secured Debt						7/1/2011						13.00%												11/15/2026			5,897			5,800			5,800
									Preferred Member Units			(8)			2/1/2011			21,806																					5,709			12,230
									Common Stock						1/27/2021			1,037																					1,200			790
																																							12,709			18,820
Quality Lease Service, LLC						Provider of Rigsite Accommodation Unit Rentals and Related Services
									Member Units						6/8/2015			1,000																					7,613			625
River Aggregates, LLC						Processor of Construction Aggregates
									Member Units			(30)			12/20/2013			1,500																					369			3,460
Robbins Bros. Jewelry, Inc.						Bridal Jewelry Retailer
									Secured Debt			(9) (25)			12/15/2021									L +			11.00%						12/15/2026			—			(38)			(38)
									Secured Debt			(9)			12/15/2021						13.63%			L +			11.00%						12/15/2026			35,910			35,609			35,609
									Preferred Equity						12/15/2021			11,070																					11,070			15,210
																																							46,641			50,781
Tedder Industries, LLC						Manufacturer of Firearm Holsters and Accessories
									Secured Debt						8/31/2018						12.00%												8/31/2023			1,840			1,840			1,840
									Secured Debt						8/31/2018						12.00%												8/31/2023			15,200			15,188			15,117
									Preferred Member Units						8/31/2018			533																					9,068			7,137
																																							26,096			24,094
Televerde, LLC						Provider of Telemarketing and Data Services
									Member Units						1/6/2011			460																					1,290			5,204
									Preferred Stock						1/26/2022			248																					718			1,794
																																							2,008			6,998

11

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Trantech Radiator Topco, LLC						Transformer Cooling Products and Services
									Secured Debt			(25)			5/31/2019																		5/31/2024			—			(5)			(5)
									Secured Debt						5/31/2019						12.00%												5/31/2024			8,320			8,288			8,320
									Common Stock			(8)			5/31/2019			615																					4,655			7,420
																																							12,938			15,735
Vision Interests, Inc.						Manufacturer / Installer of Commercial Signage
									Series A Preferred Stock			(8)			12/23/2011			3,000,000																					3,000			3,000
VVS Holdco LLC						Omnichannel Retailer of Animal Health Products
									Secured Debt			(9) (30)			12/1/2021						8.63%			L +			6.00%						12/1/2023			800			773			773
									Secured Debt			(30)			12/1/2021						11.50%												12/1/2026			30,400			30,144			30,146
									Preferred Equity			(8) (30)			12/1/2021			11,840																					11,840			12,078
																																							42,757			42,997
Ziegler’s NYPD, LLC						Casual Restaurant Group
									Secured Debt						6/1/2015						12.00%												10/1/2024			450			450			450
									Secured Debt						10/1/2008						6.50%												10/1/2024			1,000			1,000			1,000
									Secured Debt						10/1/2008						14.00%												10/1/2024			2,750			2,750			2,676
									Preferred Member Units						6/30/2015			10,072																					2,834			1,190
									Warrants			(27)			7/1/2015			587															10/1/2025						600			—
																																							7,634			5,316
Subtotal Control Investments (80.8% of net assets at fair value)																																							$	1,199,446		$	1,599,429
Affiliate Investments
AAC Holdings, Inc.			(11)			Substance Abuse Treatment Service Provider
									Secured Debt						12/11/2020						18.00%									18.00%			6/25/2025			$	11,200		$	11,051		$	10,976
									Common Stock						12/11/2020			593,928																					3,148			75
									Warrants			(27)			12/11/2020			554,353															12/11/2025						—			75
																																							14,199			11,126
AFG Capital Group, LLC						Provider of Rent-to-Own Financing Solutions and Services
									Preferred Member Units			(8)			11/7/2014			186																					1,200			8,780
ATX Networks Corp.			(11)			Provider of Radio Frequency Management Equipment
									Secured Debt			(9)			9/1/2021						11.14%			L +			7.50%						9/1/2026			6,879			6,304			6,707
									Unsecured Debt						9/1/2021						10.00%									10.00%			9/1/2028			3,309			2,205			2,465
									Common Stock						9/1/2021			583																					—			—
																																							8,509			9,172

12

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
BBB Tank Services, LLC						Maintenance, Repair and Construction Services to the Above-Ground Storage Tank Market
									Unsecured Debt			(9) (17)			4/8/2016						13.56%			L +			11.00%						4/8/2021			800			800			800
									Unsecured Debt			(9) (17)			4/8/2016						13.56%			L +			11.00%						4/8/2021			4,000			4,000			1,498
									Member Units						4/8/2016			800,000																					800			—
									Preferred Stock (non-voting)						12/17/2018						15.00%									15.00%									162			—
																																							5,762			2,298
Boccella Precast Products LLC						Manufacturer of Precast Hollow Core Concrete
									Secured Debt						9/23/2021						10.00%												2/28/2027			320			320			320
									Member Units			(8)			6/30/2017			2,160,000																					2,256			3,320
																																							2,576			3,640
Buca C, LLC						Casual Restaurant Group
									Secured Debt						6/30/2015						9.00%												6/30/2023			17,525			17,525			14,006
									Preferred Member Units						6/30/2015			6			6.00%									6.00%									4,770			—
																																							22,295			14,006
Career Team Holdings, LLC						Provider of Workforce Training and Career Development Services
									Secured Debt			(9) (25)			12/17/2021									L +			6.00%						12/17/2026			—			—			—
									Secured Debt						12/17/2021						12.50%												12/17/2026			20,250			20,080			20,080
									Common Stock						12/17/2021			450,000																					4,500			4,500
																																							24,580			24,580
Chandler Signs Holdings, LLC			(10)			Sign Manufacturer
									Class A Units						1/4/2016			1,500,000																					1,500			970
Classic H&G Holdings, LLC						Provider of Engineered Packaging Solutions
									Secured Debt			(9)			3/12/2020						8.38%			L +			6.00%						3/12/2025			7,760			7,760			7,760
									Secured Debt						3/12/2020						8.00%												3/12/2025			19,274			19,171			19,274
									Preferred Member Units			(8)			3/12/2020			154																					5,760			23,790
																																							32,691			50,824
Congruent Credit Opportunities Funds			(12) (13)			Investment Partnership
									LP Interests (Congruent Credit Opportunities Fund   III, LP)			(8) (31)			2/4/2015			17.40%																					8,214			7,854
DMA Industries, LLC						Distributor of aftermarket ride control products
									Secured Debt						11/19/2021						12.00%												11/19/2026			21,200			21,025			21,200
									Preferred Equity						11/19/2021			5,944																					5,944			7,260
																																							26,969			28,460

13

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Dos Rios Partners			(12) (13)			Investment Partnership
									LP Interests (Dos Rios Partners, LP)			(31)			4/25/2013			20.24%																					6,605			9,182
									LP Interests (Dos Rios Partners - A, LP)			(31)			4/25/2013			6.43%																					2,097			2,916
																																							8,702			12,098
Dos Rios Stone Products LLC			(10)			Limestone and Sandstone Dimension Cut Stone Mining Quarries
									Class A Preferred Units			(30)			6/27/2016			2,000,000																					2,000			350
EIG Fund Investments			(12) (13)			Investment Partnership
									LP Interests (EIG Global Private Debt Fund-A, L.P.)			(8) (31)			11/6/2015			5,000,000																					1,518			1,470
Freeport Financial Funds			(12) (13)			Investment Partnership
									LP Interests (Freeport Financial SBIC Fund LP)			(8) (31)			3/23/2015			9.30%																					4,064			4,116
									LP Interests (Freeport First Lien Loan Fund III LP)			(8) (31)			7/31/2015			5.95%																					6,630			6,175
																																							10,694			10,291
GFG Group, LLC.						Grower and Distributor of a Variety of Plants and Products to Other Wholesalers, Retailers and Garden Centers
									Secured Debt						3/31/2021						9.00%												3/31/2026			11,745			11,661			11,745
									Preferred Member Units			(8)			3/31/2021			226																					4,900			7,140
																																							16,561			18,885
Harris Preston Fund Investments			(12) (13)			Investment Partnership
									LP Interests (HPEP 3, L.P.)			(8) (31)			8/9/2017			8.22%																					2,558			4,331
									LP Interests (HPEP 4, L.P.)			(31)			7/12/2022			9.60%																					1,896			1,896
									LP Interests (423 COR, LP)			(31)			6/2/2022			22.93%																					1,400			1,400
																																							5,854			7,627
Hawk Ridge Systems, LLC						Value-Added Reseller of Engineering Design and Manufacturing Solutions
									Secured Debt			(9)			12/2/2016						8.38%			L +			6.00%						1/15/2026			3,185			3,182			3,182
									Secured Debt						12/2/2016						8.00%												1/15/2026			37,800			37,675			37,800
									Preferred Member Units			(8)			12/2/2016			226																					2,850			19,080
									Preferred Member Units			(30)			12/2/2016			226																					150			1,000
																																							43,857			61,062
Houston Plating and Coatings, LLC						Provider of Plating and Industrial Coating Services
									Unsecured Convertible Debt						5/1/2017						8.00%												10/2/2024			3,000			3,000			2,750
									Member Units			(8)			1/8/2003			322,297																					2,352			2,220

14

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
																																							5,352			4,970
I-45 SLF LLC			(12) (13)			Investment Partnership
									Member Units (Fully diluted 20.0%; 21.75% profits   interest)			(8)			10/20/2015			—																					19,000			12,507
Iron-Main Investments, LLC						Consumer Reporting Agency Providing Employment Background Checks and Drug Testing
									Secured Debt						8/2/2021						12.50%												11/15/2026			4,600			4,564			4,564
									Secured Debt						9/1/2021						12.50%												11/15/2026			3,200			3,174			3,174
									Secured Debt						11/15/2021						12.50%												11/15/2026			8,944			8,944			8,944
									Secured Debt						11/15/2021						12.50%												11/15/2026			20,000			19,835			19,835
									Common Stock						8/3/2021			179,778																					1,798			1,798
																																							38,315			38,315
OnAsset Intelligence, Inc.						Provider of Transportation Monitoring / Tracking Products and Services
									Secured Debt			(14)			5/20/2014						12.00%									12.00%			12/31/2022			964			964			690
									Secured Debt			(14)			3/21/2014						12.00%									12.00%			12/31/2022			983			983			703
									Secured Debt			(14)			5/10/2013						12.00%									12.00%			12/31/2022			2,116			2,116			1,515
									Secured Debt			(14)			4/18/2011						12.00%									12.00%			12/31/2022			4,415			4,415			3,160
									Unsecured Debt			(14)			6/5/2017						10.00%									10.00%			12/31/2022			197			197			197
									Preferred Stock			(14)			4/18/2011			912			7.00%									7.00%									1,981			—
									Common Stock						4/15/2021			635																					830			—
									Warrants			(27)			4/18/2011			4,699															5/10/2023						1,089			—
																																							12,575			6,265
Oneliance, LLC						Construction Cleaning Company
									Secured Debt			(9) (25)			8/6/2021									L +			11.00%						8/6/2023			—			—			—
									Secured Debt			(9)			8/6/2021						13.56%			L +			11.00%						8/6/2026			5,600			5,556			5,556
									Preferred Stock						8/6/2021			1,056																					1,056			1,056
																																							6,612			6,612
Rocaceia, LLC (Quality Lease and Rental Holdings, LLC)						Provider of Rigsite Accommodation Unit Rentals and Related Services
									Secured Debt			(14) (17) (39)			6/30/2015						12.00%												1/8/2018			30,369			29,865			—
									Preferred Member Units						1/8/2013			250																					2,500			—
																																							32,365			—
SI East, LLC						Rigid Industrial Packaging Manufacturing
									Secured Debt						8/31/2018						10.25%												8/31/2023			2,250			2,250			2,250
									Secured Debt						8/31/2018						10.25%												8/31/2023			93,236			93,124			93,236
									Preferred Member Units			(8)			8/31/2018			157																					1,218			14,950
																																							96,592			110,436
Slick Innovations, LLC						Text Message Marketing Platform

15

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Secured Debt						9/13/2018						11.00%												9/13/2023			4,240			4,209			4,240
									Common Stock						9/13/2018			70,000																					700			1,640
									Warrants			(27)			9/13/2018			18,084															9/13/2028						181			440
																																							5,090			6,320
Sonic Systems International, LLC			(10)			Nuclear Power Staffing Services
									Secured Debt			(9)			8/20/2021						9.78%			L +			7.50%						8/20/2026			15,769			15,510			15,613
									Common Stock						8/20/2021			9,968																					1,356			1,420
																																							16,866			17,033
Superior Rigging & Erecting Co.						Provider of Steel Erecting, Crane Rental & Rigging Services
									Secured Debt						8/31/2020						12.00%												8/31/2025			21,500			21,367			21,367
									Preferred Member Units						8/31/2020			1,571																					4,500			4,500
																																							25,867			25,867
The Affiliati Network, LLC						Performance Marketing Solutions
									Secured Debt			(25)			8/9/2021																		8/9/2026			—			(15)			(15)
									Secured Debt						8/9/2021						13.00%												8/9/2026			11,241			11,149			11,149
									Preferred Stock			(8)			8/9/2021			1,280,000																					6,400			6,400
																																							17,534			17,534
UnionRock Energy Fund II, LP			(12) (13)			Investment Partnership
									LP Interests			(8) (31)			6/15/2020			11.11%																					3,123			5,354
UniTek Global Services, Inc.			(11)			Provider of Outsourced Infrastructure Services
									Secured Debt			(9) (29)			10/15/2018						10.76%			SF +			5.50%			2.00%			8/20/2024			403			403			380
									Secured Debt			(9) (29)			8/27/2018						10.76%			SF +			5.50%			2.00%			8/20/2024			1,804			1,793			1,701
									Secured Convertible Debt						1/1/2021						15.00%									15.00%			2/20/2025			2,312			2,312			4,271
									Preferred Stock			(8)			8/29/2019			1,133,102			20.00%									20.00%									2,037			2,833
									Preferred Stock						8/21/2018			1,521,122			20.00%									20.00%									2,188			1,651
									Preferred Stock						6/30/2017			2,281,682			19.00%									19.00%									3,667			—
									Preferred Stock						1/15/2015			4,336,866			13.50%									13.50%									7,924			—
									Common Stock						4/1/2020			945,507																					—			—
																																							20,324			10,836
Universal Wellhead Services Holdings, LLC			(10)			Provider of Wellhead Equipment, Designs, and Personnel to the Oil & Gas Industry
									Preferred Member Units			(30)			12/7/2016			716,949			14.00%									14.00%									1,032			—
									Member Units			(30)			12/7/2016			4,000,000																					4,000			—
																																							5,032			—
Volusion, LLC						Provider of Online Software-as-a-Service eCommerce Solutions
									Secured Debt			(17)			1/26/2015						11.50%												1/26/2020			16,734			16,734			16,630
									Unsecured Convertible Debt						5/16/2018						8.00%												11/16/2023			409			409			409

16

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Preferred Member Units						1/26/2015			4,876,670																					14,000			—
									Warrants			(27)			1/26/2015			1,831,355															1/26/2025						2,576			—
																																							33,719			17,039
Subtotal Affiliate Investments (27.9% of net assets at fair value)																																							$	576,047		$	552,581
Non-Control Investments
AB Centers Acquisition Corporation			(10)			Applied Behavior Analysis Therapy Provider
									Secured Debt			(9) (29) (25)			9/6/2022									SF +			6.00%						9/6/2028			$	—		$	(41)		$	(41)
									Secured Debt			(9) (29) (25)			9/6/2022									SF +			6.00%						9/6/2028			—			(82)			(82)
									Secured Debt			(9) (29)			9/6/2022						9.17%			SF +			6.00%						9/6/2028			17,052			16,582			16,582
																																							16,459			16,459
Acousti Engineering Company of Florida			(10)			Interior Subcontractor Providing Acoustical Walls and Ceilings
									Secured Debt			(9)			11/2/2020						10.78%			L +			8.50%						11/2/2025			1,678			1,668			1,664
									Secured Debt			(9)			11/2/2020						10.00%			L +			8.50%						11/2/2025			10,027			9,954			9,944
									Secured Debt			(9)			5/26/2021						14.78%			L +			12.50%						11/2/2025			817			811			817
																																							12,433			12,425
Acumera, Inc.			(10)			Managed Security Service Provider
									Secured Debt			(9)			6/28/2022						12.02%			L +			9.50%						10/26/2027			13,831			13,488			13,711
									Secured Debt			(9)			6/28/2022						12.02%			L +			9.50%						10/26/2027			4,368			4,265			4,330
																																							17,753			18,041
Adams Publishing Group, LLC			(10)			Local Newspaper Operator
									Secured Debt			(9)			3/11/2022						12.75%			P +			6.50%						3/11/2027			3,547			3,547			3,418
									Secured Debt			(9)			3/11/2022						10.75%			L +			7.50%						3/11/2027			24,305			24,245			23,788
																																							27,792			27,206
ADS Tactical, Inc.			(11)			Value-Added Logistics and Supply Chain Provider to the Defense Industry
									Secured Debt			(9)			3/29/2021						8.80%			L +			5.75%						3/19/2026			21,286			20,964			19,676
AMEREQUIP LLC.			(10)			Full Service Provider of Comprehensive Commercial Production Services, Including the Design, Engineering, and Manufacturing of Products It
									Secured Debt			(9) (29) (25)			8/31/2022									SF +			7.40%						8/31/2027			—			(144)			(144)
									Secured Debt			(9) (29)			8/31/2022						9.84%			SF +			7.40%						8/31/2027			37,545			36,830			36,830
									Common Stock						8/31/2022			235																					1,734			1,734
																																							38,420			38,420
American Health Staffing Group, Inc.			(10)			Healthcare Temporary Staffing

17

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Secured Debt			(9) (25)			11/19/2021									L +			7.00%						11/19/2026			—			(11)			(11)
									Secured Debt			(9)			11/19/2021						8.01%			L +			7.00%						11/19/2026			6,633			6,578			6,633
																																							6,567			6,622
American Nuts, LLC			(10)			Roaster, Mixer and Packager of Bulk Nuts and Seeds
									Secured Debt			(9) (29)			3/11/2022						8.98%			SF +			6.75%						4/10/2026			15,667			15,430			15,287
									Secured Debt			(9) (29)			3/11/2022						10.98%			SF +			8.75%						4/10/2026			15,667			15,430			15,307
																																							30,860			30,594
American Teleconferencing Services, Ltd.			(11)			Provider of Audio Conferencing and Video Collaboration Solutions
									Secured Debt			(14)			9/17/2021						7.50%			L +			6.50%						12/8/2022			2,980			2,980			168
									Secured Debt			(9) (14)			5/19/2016						7.50%			L +			6.50%						6/8/2023			14,370			13,706			808
																																							16,686			976
ArborWorks, LLC			(10)			Vegetation Management Services
									Secured Debt			(9)			11/9/2021						9.97%			L +			7.00%						11/9/2026			4,678			4,562			4,131
									Secured Debt			(9)			11/9/2021						9.87%			L +			7.00%						11/9/2026			29,722			29,231			26,245
									Common Equity						11/9/2021			234																					234			14
																																							34,027			30,390
Archer Systems, LLC			(10)			Mass Tort Settlement Administration Solutions Provider
									Secured Debt			(9) (29)			8/11/2022						9.65%			SF +			6.50%						8/11/2027			800			660			660
									Secured Debt			(9) (29)			8/11/2022						8.91%			SF +			6.50%						8/11/2027			67,597			66,281			66,281
									Common Stock						8/11/2022			1,387,832																					1,388			1,388
																																							68,329			68,329
Arrow International, Inc			(10)			Manufacturer and Distributor of Charitable Gaming Supplies
									Secured Debt			(9) (23)			12/21/2020						11.96%			P +			5.61%						12/21/2025			36,000			35,715			36,000
ATS Operating, LLC			(10)			For-Profit Thrift Retailer
									Secured Debt			(9) (29) (25)			1/18/2022									SF +			6.50%						1/18/2027			—			—			—
									Secured Debt			(9) (29)			1/18/2022						7.84%			SF +			5.50%						1/18/2027			6,660			6,660			6,360
									Secured Debt			(9) (29)			1/18/2022						9.84%			SF +			7.50%						1/18/2027			6,660			6,660			6,384
									Common Stock						1/18/2022			720,000																					720			720
																																							14,040			13,464
AVEX Aviation Holdings, LLC			(10)			Specialty Aircraft Dealer
									Secured Debt			(9)			12/15/2021						10.32%			L +			7.00%						12/15/2026			720			659			679
									Secured Debt			(9)			12/15/2021						10.29%			L +			7.00%						12/15/2026			12,148			11,944			11,452
									Common Equity						12/15/2021			360																					360			258
																																							12,963			12,389
Berry Aviation, Inc.			(10)			Charter Airline Services
									Secured Debt						7/6/2018						12.00%						10.50%			1.50%			1/6/2024			194			194			194

18

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Preferred Member Units			(8) (30)			7/6/2018			1,548,387			8.00%									8.00%									2,147			4,607
									Preferred Member Units			(8) (30)			11/12/2019			122,416			16.00%									16.00%									188			378
																																							2,529			5,179
Bettercloud, Inc.			(10)			SaaS Provider of Workflow Management and Business Application Solutions
									Secured Debt			(9) (29) (25)			6/30/2022									SF +			6.00%						6/30/2028			—			(79)			(79)
									Secured Debt			(9) (29)			6/30/2022						9.78%			SF +			6.75%			5.75%			6/30/2028			26,965			26,458			26,965
																																							26,379			26,886
Binswanger Enterprises, LLC			(10)			Glass Repair and Installation Service Provider
									Member Units						3/10/2017			1,050,000																					1,050			560
Bluestem Brands, Inc.			(11)			Multi-Channel Retailer of General Merchandise
									Secured Debt			(9)			8/28/2020						11.29%			L +			8.50%						8/28/2025			6,303			6,303			6,193
									Common Stock			(8)			10/1/2020			723,184																					1			5,445
																																							6,304			11,638
Brainworks Software, LLC			(10)			Advertising Sales and Newspaper Circulation Software
									Secured Debt			(9) (14) (17)			8/12/2014						12.50%			P +			9.25%						7/22/2019			761			761			761
									Secured Debt			(9) (14) (17)			8/12/2014						12.50%			P +			9.25%						7/22/2019			7,056			7,056			3,440
																																							7,817			4,201
Brightwood Capital Fund Investments			(12) (13)			Investment Partnership
									LP Interests (Brightwood Capital Fund V, LP)			(31)			7/12/2021			1.31%																					2,000			2,139
									LP Interests (Brightwood Capital Fund III, LP)			(8) (31)			7/21/2014			1.55%																					7,062			4,564
									LP Interests (Brightwood Capital Fund IV, LP)			(8) (31)			10/26/2016			0.59%																					4,350			4,477
																																							13,412			11,180
Burning Glass Intermediate Holding Company, Inc.			(10)			Provider of Skills-Based Labor Market Analytics
									Secured Debt			(9)			6/14/2021						7.52%			L +			5.00%						6/10/2026			620			590			620
									Secured Debt			(9)			6/14/2021						7.52%			L +			5.00%						6/10/2028			19,933			19,643			19,933
																																							20,233			20,553
Cadence Aerospace LLC			(10)			Aerostructure Manufacturing
									Secured Debt			(9) (34)			11/14/2017						11.31%			L +			8.50%			0.13%			11/14/2023			28,385			28,302			28,352
CAI Software LLC						Provider of Specialized Enterprise Resource Planning Software
									Preferred Equity			(8)			12/13/2021			1,788,527																					1,789			1,789
									Preferred Equity						12/13/2021			596,176																					—			—

19

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
																																							1,789			1,789
Camin Cargo Control, Inc.			(11)			Provider of Mission Critical Inspection, Testing and Fuel Treatment Services
									Secured Debt			(9)			6/14/2021						9.62%			L +			6.50%						6/4/2026			15,258			15,142			14,724
CaseWorthy, Inc.			(10)			SaaS Provider of Case Management Solutions
									Secured Debt			(9) (25)			5/18/2022									L +			5.25%						5/18/2027			—			(11)			(11)
									Secured Debt			(9) (25)			5/18/2022									L +			5.25%						5/18/2027			—			—			—
									Secured Debt			(9)			5/18/2022						8.26%			L +			5.25%						5/18/2027			6,133			6,076			5,999
																																							6,065			5,988
Channel Partners Intermediateco, LLC			(10)			Outsourced Consumer Services Provider
									Secured Debt			(9) (29)			2/7/2022						9.08%			SF +			6.25%						2/7/2027			5,183			5,075			4,937
									Secured Debt			(9) (29) (28)			2/7/2022						7.70%			SF +			6.25%						2/7/2027			39,155			38,462			37,299
																																							43,537			42,236
Clarius BIGS, LLC			(10)			Prints & Advertising Film Financing
									Secured Debt			(14) (17)			9/23/2014						15.00%									15.00%			1/5/2015			2,729			2,729			10
Computer Data Source, LLC			(10)			Third Party Maintenance Provider to the Data Center Ecosystem
									Secured Debt			(9)			8/6/2021						10.13%			L +			7.50%						8/6/2026			5,000			4,923			4,519
									Secured Debt			(9)			8/6/2021						10.37%			L +			7.50%						8/6/2026			18,656			18,364			16,860
																																							23,287			21,379
Construction Supply Investments, LLC			(10)			Distribution Platform of Specialty Construction Materials to Professional Concrete and Masonry Contractors
									Member Units			(8)			12/29/2016			861,618																					3,335			20,795
Dalton US Inc.			(10)			Provider of Supplemental Labor Services
									Secured Debt			(9) (29)			8/16/2022						11.13%			SF +			8.00%						8/16/2027			763			530			530
									Secured Debt			(9) (29) (25)			8/16/2022									SF +			8.00%						8/16/2027			—			(78)			(78)
									Secured Debt			(9) (29)			8/16/2022						11.31%			SF +			8.00%						8/16/2027			14,389			14,111			14,111
									Common Stock						8/16/2022			201																					201			201
																																							14,764			14,764
DTE Enterprises, LLC			(10)			Industrial Powertrain Repair and Services
									Secured Debt			(9) (25)			4/13/2018									L +			7.50%						4/13/2023			—			(2)			(2)
									Secured Debt			(9)			4/13/2018						10.44%			L +			7.50%						4/13/2023			7,824			7,803			7,486
									Class A Preferred Member Units						4/13/2018			776,316			8.00%									8.00%									776			270

20

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Class AA Preferred Member Units (non-voting)			(8)			4/13/2018						10.00%									10.00%									1,132			1,132
																																							9,709			8,886
Dynamic Communities, LLC			(10)			Developer of Business Events and Online Community Groups
									Secured Debt			(9) (25)			7/17/2018									L +			8.50%						7/17/2023			—			—			—
									Secured Debt			(9)			9/28/2022						10.75%			L +			7.50%						7/17/2023			2,805			2,791			2,268
									Secured Debt			(9)			9/28/2022						12.75%			L +			9.50%						7/17/2023			2,805			2,791			2,147
																																							5,582			4,415
Eastern Wholesale Fence LLC			(10)			Manufacturer and Distributor of Residential and Commercial Fencing Solutions
									Secured Debt			(9)			11/19/2020						10.07%			L +			7.00%						10/30/2025			4,461			4,400			4,342
									Secured Debt			(9)			11/19/2020						10.07%			L +			7.00%						10/30/2025			5,053			4,995			4,918
									Secured Debt			(9)			11/19/2020						10.07%			L +			7.00%						10/30/2025			23,606			23,272			22,974
																																							32,667			32,234
Emerald Technologies Acquisition Co, Inc.			(11)			Design & Manufacturing
									Secured Debt			(9) (29)			2/10/2022						9.38%			SF +			6.25%						2/10/2028			9,258			9,091			8,911
EnCap Energy Fund Investments			(12) (13)			Investment Partnership
									LP Interests (EnCap Energy Capital Fund VIII, L.P.)			(8) (31)			1/22/2015			0.14%																					3,587			2,184
									LP Interests (EnCap Energy Capital Fund VIII Co- Investors, L.P.)			(8) (31)			1/21/2015			0.38%																					1,984			1,037
									LP Interests (EnCap Energy Capital Fund IX, L.P.)			(8) (31)			1/22/2015			0.10%																					3,755			2,177
									LP Interests (EnCap Energy Capital Fund X, L.P.)			(8) (31)			3/25/2015			0.15%																					8,326			10,130
									LP Interests (EnCap Flatrock Midstream Fund II, L.P.)			(31)			3/30/2015			0.84%																					5,358			1,583
									LP Interests (EnCap Flatrock Midstream Fund III, L.P.)			(8) (31)			3/27/2015			0.25%																					6,019			5,089
																																							29,029			22,200
Engineering Research & Consulting, LLC			(10)			Provider of Engineering & Consulting Services to US Department of Defense
									Secured Debt			(9) (29)			5/23/2022						11.00%			SF +			6.25%						5/23/2027			120			72			116
									Secured Debt			(9) (29)			5/23/2022						9.38%			SF +			6.25%						5/23/2028			16,338			16,034			15,772
																																							16,106			15,888
EPIC Y-Grade Services, LP			(11)			NGL Transportation & Storage
									Secured Debt			(9)			6/22/2018						8.08%			L +			6.00%						6/30/2027			6,840			6,778			5,803

21

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Event Holdco, LLC			(10)			Event and Learning Management Software for Healthcare Organizations and Systems
									Secured Debt			(9) (30)			12/22/2021						9.25%			L +			7.00%						12/22/2026			3,692			3,661			3,367
									Secured Debt			(9) (30)			12/22/2021						10.67%			L +			7.00%						12/22/2026			44,308			43,933			40,402
																																							47,594			43,769
Flip Electronics LLC			(10)			Distributor of Hard-to-Find and Obsolete Electronic Components
									Secured Debt			(9) (29)			3/24/2022						11.21%			SF +			7.50%						1/2/2026			491			491			491
									Secured Debt			(9) (29)			1/4/2021						11.19%			SF +			7.50%						1/2/2026			6,185			6,078			6,078
																																							6,569			6,569
Fuse, LLC			(11)			Cable Networks Operator
									Secured Debt						6/30/2019						12.00%												6/28/2024			1,810			1,810			1,512
									Common Stock						6/30/2019			10,429																					256			—
																																							2,066			1,512
GeoStabilization International (GSI)			(11)			Geohazard Engineering Services & Maintenance
									Secured Debt						1/2/2019						8.07%			L +			5.25%						12/19/2025			20,550			20,474			20,139
GS HVAM Intermediate, LLC			(10)			Specialized Food Distributor
									Secured Debt			(9)			10/18/2019						8.26%			L +			6.50%						10/2/2024			2,273			2,264			2,211
									Secured Debt			(9)			10/18/2019						9.62%			L +			6.50%						10/2/2024			10,858			10,813			10,564
																																							13,077			12,775
GULF PACIFIC ACQUISITION, LLC			(10)			Rice Processor and Merchandiser
									Secured Debt			(9) (29) (25)			9/30/2022									SF +			6.00%						9/30/2028			—			(20)			(20)
									Secured Debt			(9) (29) (25)			9/30/2022									SF +			6.00%						9/30/2028			—			(15)			(15)
									Secured Debt			(9) (29)			9/30/2022						9.59%			SF +			6.00%						9/30/2028			3,661			3,588			3,588
																																							3,553			3,553
HDC/HW Intermediate Holdings			(10)			Managed Services and Hosting Provider
									Secured Debt			(9) (29)			12/21/2018						11.76%			SF +			9.50%			5.75%			12/21/2023			320			319			297
									Secured Debt			(9) (29)			12/21/2018						11.76%			SF +			9.50%			5.75%			12/21/2023			3,117			3,100			2,888
																																							3,419			3,185
HEADLANDS OP-CO LLC			(10)			Clinical Trial Sites Operator
									Secured Debt			(9) (29) (25)			8/1/2022									SF +			6.50%						8/1/2027			—			(65)			(65)
									Secured Debt			(9) (29) (25)			8/1/2022									SF +			6.50%						8/1/2027			—			(65)			(65)
									Secured Debt			(9) (29)			8/1/2022						9.52%			SF +			6.50%						8/1/2027			16,875			16,549			16,549
																																							16,419			16,419

22

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Heartland Dental, LLC			(10)			Dental Support Organization
									Secured Debt			(9)			9/9/2020						9.62%			L +			6.50%						4/30/2025			14,663			14,405			13,563
HOWLCO LLC			(11) (13) (21)			Provider of Accounting and Business Development Software to Real Estate End Markets
									Secured Debt			(9)			8/19/2021						8.96%			L +			6.00%						10/23/2026			25,354			25,354			23,648
Hybrid Promotions, LLC			(10)			Wholesaler of Licensed, Branded and Private Label Apparel
									Secured Debt			(9)			6/30/2021						10.33%			L +			8.25%						6/30/2026			7,088			6,979			6,721
IG Parent Corporation			(11)			Software Engineering
									Secured Debt			(9) (29)			7/30/2021						8.41%			SF +			5.75%						7/30/2026			443			413			435
									Secured Debt			(9) (29)			7/30/2021						8.23%			SF +			5.75%						7/30/2026			14,536			14,327			14,279
																																							14,740			14,714
Implus Footcare, LLC			(10)			Provider of Footwear and Related Accessories
									Secured Debt			(9)			6/1/2017						10.25%			L +			7.75%			0.25%			4/30/2024			18,609			18,452			17,194
Independent Pet Partners Intermediate Holdings, LLC			(10)			Omnichannel Retailer of Specialty Pet Products
									Secured Debt			(35)			8/20/2020						11.26%			(blank)						11.26%			12/22/2022			6,831			6,831			6,831
									Secured Debt			(14)			12/10/2020						6.00%									6.00%			11/20/2023			18,428			17,664			13,419
									Preferred Stock (non-voting)			(14)			12/10/2020						6.00%									6.00%									3,235			—
									Preferred Stock (non-voting)						12/10/2020																								—			—
									Member Units						11/20/2018			1,558,333																					1,558			—
									Warrants			(38) (25)			11/20/2018			242,914															11/19/2028						—			—
																																							29,288			20,250
Industrial Services Acquisition, LLC			(10)			Industrial Cleaning Services
									Secured Debt			(9)			8/13/2021						9.88%			L +			6.75%						8/13/2026			463			428			463
									Secured Debt			(9)			8/13/2021						9.69%			L +			6.75%						8/13/2026			19,288			18,984			19,288
									Preferred Member Units			(8) (30)			1/31/2018			144			10.00%									10.00%									127			161
									Preferred Member Units			(8) (30)			5/17/2019			80			20.00%									20.00%									89			101
									Member Units			(30)			6/17/2016			900																					900			690
																																							20,528			20,703
Infolinks Media Buyco, LLC			(10)			Exclusive Placement Provider to the Advertising Ecosystem
									Secured Debt			(9) (25)			11/1/2021									L +			5.75%						11/1/2026			—			(20)			(20)
									Secured Debt			(9)			11/1/2021						9.42%			L +			5.75%						11/1/2026			8,637			8,495			8,543

23

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
																																							8,475			8,523
Interface Security Systems, L.L.C			(10)			Commercial Security & Alarm Services
									Secured Debt			(9)			12/9/2021						12.32%			L +			10.00%						8/7/2023			1,398			1,398			1,398
									Secured Debt			(9) (14)			8/7/2019						10.52%			L +			7.00%			1.00%			8/7/2023			7,313			7,237			1,549
									Common Stock						12/7/2021			2,143																					—			—
																																							8,635			2,947
Intermedia Holdings, Inc.			(11)			Unified Communications as a Service
									Secured Debt			(9)			8/3/2018						9.12%			L +			6.00%						7/19/2025			20,467			20,414			17,960
Invincible Boat Company, LLC.			(10)			Manufacturer of Sport Fishing Boats
									Secured Debt			(9)			8/28/2019						9.42%			L +			6.50%						8/28/2025			726			721			716
									Secured Debt			(9)			8/28/2019						8.75%			L +			6.50%						8/28/2025			16,889			16,774			16,645
																																							17,495			17,361
INW Manufacturing, LLC			(11)			Manufacturer of Nutrition and Wellness Products
									Secured Debt			(9)			5/19/2021						8.71%			L +			5.75%						3/25/2027			7,125			6,959			6,306
Isagenix International, LLC			(11)			Direct Marketer of Health & Wellness Products
									Secured Debt			(9)			6/21/2018						9.93%			L +			7.75%			9.93%			6/14/2025			4,951			4,933			2,140
Jackmont Hospitality, Inc.			(10)			Franchisee of Casual Dining Restaurants
									Secured Debt			(9)			11/8/2021						8.75%			L +			6.50%						11/4/2024			2,084			2,084			1,987
									Preferred Equity			(8)			11/8/2021			2,826,667																					116			616
																																							2,200			2,603
Joerns Healthcare, LLC			(11)			Manufacturer and Distributor of Health Care Equipment & Supplies
									Secured Debt						11/15/2021						15.00%						15.00%			15.00%			11/8/2022			1,833			1,833			1,833
									Secured Debt			(14)			8/21/2019						19.75%									19.75%			8/21/2024			4,034			3,997			1,222
									Common Stock						8/21/2019			472,579																					4,429			—
																																							10,259			3,055
JTI Electrical & Mechanical, LLC			(10)			Electrical, Mechanical and Automation Services
									Secured Debt			(9) (25)			12/22/2021									L +			6.00%						12/22/2026			—			(143)			(143)
									Secured Debt			(9)			12/22/2021						8.26%			L +			6.00%						12/22/2026			37,421			36,788			37,321
									Common Equity						12/22/2021			1,684,211																					1,684			2,340
																																							38,329			39,518
KMS, LLC			(10)			Wholesaler of Closeout and Value-priced Products
									Secured Debt			(9)			10/4/2021						9.56%			L +			7.25%						10/4/2026			1,075			1,026			1,014

24

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Secured Debt			(9)			10/4/2021						9.56%			L +			7.25%						10/4/2026			7,524			7,402			7,101
																																							8,428			8,115
Kore Wireless Group Inc.			(11) (13)			Mission Critical Software Platform
									Secured Debt						12/31/2018						9.17%			L +			5.50%						12/20/2024			11,326			11,275			11,199
Lightbox Holdings, L.P.			(11)			Provider of Commercial Real Estate Software
									Secured Debt						5/9/2019						7.96%			L +			5.00%						5/9/2026			14,513			14,377			14,005
LKCM Headwater Investments I, L.P.			(12) (13)			Investment Partnership
									LP Interests			(8) (31)			1/25/2013			2.27%																					1,746			3,197
LL Management, Inc.			(10)			Medical Transportation Service Provider
									Secured Debt			(9) (29)			5/2/2019						10.20%			SF +			7.25%						9/25/2023			8,126			8,102			8,126
									Secured Debt			(9) (29)			5/2/2019						9.81%			SF +			7.25%						9/25/2023			9,220			9,171			9,220
									Secured Debt			(9) (29)			5/12/2022						9.13%			SF +			7.25%						9/25/2023			10,855			10,728			10,799
																																							28,001			28,145
LLFlex, LLC			(10)			Provider of Metal-Based Laminates
									Secured Debt			(9)			8/16/2021						11.28%			L +			9.00%						8/16/2026			4,455			4,376			4,234
Logix Acquisition Company, LLC			(10)			Competitive Local Exchange Carrier
									Secured Debt			(9)			1/8/2018						8.87%			L +			5.75%						12/22/2024			19,662			18,954			17,941
Looking Glass Investments, LLC			(12) (13)			Specialty Consumer Finance
									Member Units						7/1/2015			3																					125			25
Mac Lean-Fogg Company			(10)			Manufacturer and Supplier for Auto and Power Markets
									Secured Debt			(9)			4/22/2019						7.87%			L +			4.75%						12/22/2025			1,786			1,779			1,768
									Secured Debt			(9)			4/22/2019						7.87%			L +			4.75%						12/22/2025			15,163			15,102			15,011
									Preferred Stock						10/1/2019						13.75%									9.25%									1,984			1,926
																																							18,865			18,705
Mako Steel, LP			(10)			Self-Storage Design & Construction
									Secured Debt			(9)			3/15/2021						10.42%			L +			7.25%						3/15/2026			1,643			1,599			1,586
									Secured Debt			(9)			3/15/2021						11.09%			L +			7.25%						3/15/2026			15,324			15,107			14,791
																																							16,706			16,377
MB2 Dental Solutions, LLC			(11)			Dental Partnership Organization

25

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Secured Debt			(9) (29) (36)			1/28/2021						9.08%			SF +			6.00%						1/29/2027			6,816			6,757			6,763
									Secured Debt			(9) (29)			1/28/2021						9.70%			SF +			6.00%						1/29/2027			7,896			7,799			7,834
																																							14,556			14,597
Microbe Formulas, LLC			(10)			Nutritional Supplements Provider
									Secured Debt			(9) (29) (25)			4/4/2022									SF +			6.25%						4/3/2028			—			(66)			(66)
									Secured Debt			(9) (29)			4/4/2022						8.36%			SF +			6.25%						4/3/2028			27,625			27,118			25,665
																																							27,052			25,599
Mills Fleet Farm Group, LLC			(10)			Omnichannel Retailer of Work, Farm and Lifestyle Merchandise
									Secured Debt			(9)			10/24/2018						9.06%			L +			6.25%						10/24/2024			18,769			18,533			18,309
MonitorUS Holding, LLC			(10) (13) (21)			SaaS Provider of Media Intelligence Services
									Secured Debt			(9) (25)			5/24/2022									L +			7.00%						5/24/2027			—			(68)			(68)
									Secured Debt			(9)			5/24/2022						9.43%			L +			7.00%						5/24/2027			10,107			9,912			9,677
									Secured Debt			(9)			5/24/2022						8.51%			L +			7.00%						5/24/2027			17,038			16,730			16,808
									Common Stock						8/30/2022			44,445,814																					889			889
																																							27,463			27,306
NBG Acquisition Inc			(11)			Wholesaler of Home Décor Products
									Secured Debt			(9)			4/28/2017						9.67%			L +			5.50%						4/26/2024			3,876			3,859			1,841
NinjaTrader, LLC			(10)			Operator of Futures Trading Platform
									Secured Debt			(9) (25)			12/18/2019									L +			6.75%						12/18/2024			—			(2)			—
									Secured Debt			(9) (25)			12/18/2019									L +			6.75%						12/18/2024			—			(43)			(43)
									Secured Debt			(9)			12/18/2019						8.53%			L +			6.75%						12/18/2024			21,666			21,387			21,666
																																							21,342			21,623
NNE Partners, LLC			(10)			Oil & Gas Exploration & Production
									Secured Debt						3/2/2017						10.86%			L +			9.25%						12/31/2023			24,781			24,736			24,073
Northstar Group Services, Inc			(11)			Commercial & Industrial Services
									Secured Debt			(9)			11/1/2021						8.62%			L +			5.50%						11/12/2026			9,742			9,702			9,535
NTM Acquisition Corp.			(11)			Provider of B2B Travel Information Content
									Secured Debt			(9)			7/12/2016						9.50%			L +			6.25%			1.00%			6/7/2024			4,490			4,490			4,333
NWN Corporation			(10)			Value Added Reseller and Provider of Managed Services to a Diverse Set of Industries

26

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Secured Debt			(9)			5/7/2021						9.27%			L +			6.50%						5/7/2026			3,941			3,832			3,715
									Secured Debt			(9)			5/7/2021						9.37%			L +			6.50%						5/7/2026			40,615			40,014			38,285
																																							43,846			42,000
Ospemifene Royalty Sub LLC			(10)			Estrogen-Deficiency Drug Manufacturer and Distributor
									Secured Debt			(14)			7/8/2013						11.50%												11/15/2026			4,511			4,511			61
OVG Business Services, LLC			(10)			Venue Management Services
									Secured Debt			(9)			11/29/2021						9.34%			L +			6.25%						11/19/2028			13,965			13,843			13,057
Paragon Healthcare, Inc.			(10)			Infusion Therapy Treatment Provider
									Secured Debt			(9) (29) (25)			1/19/2022									SF +			5.75%						1/19/2027			—			(111)			(111)
									Secured Debt			(9) (29)			1/19/2022						8.45%			SF +			5.75%						1/19/2027			1,620			1,523			1,534
									Secured Debt			(9) (29)			1/19/2022						8.40%			SF +			5.75%						1/19/2027			18,293			17,825			17,330
																																							19,237			18,753
Project Eagle Holdings, LLC			(10)			Provider of Secure Business Collaboration Software
									Secured Debt			(9) (25)			7/6/2020									L +			6.50%						7/6/2026			—			(20)			(20)
									Secured Debt			(9)			7/6/2020						9.33%			L +			6.50%						7/6/2026			29,550			29,083			28,831
																																							29,063			28,811
PTL US Bidco, Inc			(10)			Manufacturers of Equipment, Including Drilling Rigs and Equipment, and Providers of Supplies and Services to Companies Involved In the Drilling, Evaluation and Completion of Oil and Gas Wells.
									Secured Debt			(9) (29) (25)			8/19/2022									SF +			8.25%						8/19/2027			—			(184)			(184)
									Secured Debt			(9) (29)			8/19/2022						11.40%			SF +			8.25%						8/19/2027			28,625			28,074			28,074
																																							27,890			27,890
RA Outdoors LLC			(10)			Software Solutions Provider for Outdoor Activity Management
									Secured Debt			(9) (29) (25)			4/8/2021									SF +			6.75%						4/8/2026			—			(12)			(12)
									Secured Debt			(9) (29)			4/8/2021						9.03%			SF +			6.75%						4/8/2026			13,369			13,231			12,252
																																							13,219			12,240
Research Now Group, Inc. and Survey Sampling International, LLC			(11)			Provider of Outsourced Online Surveying
									Secured Debt			(9) (29)			12/29/2017						8.84%			SF +			5.50%						12/20/2024			19,966			19,717			18,128
RM Bidder, LLC			(10)			Scripted and Unscripted TV and Digital Programming Provider

27

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Member Units						11/12/2015			2,779																					46			24
									Warrants			(26)			11/12/2015			187,161															10/20/2025						425			—
																																							471			24
Roof Opco, LLC			(10)			Residential Re-Roofing/Repair
									Secured Debt			(9) (25)			8/27/2021									L +			6.50%						8/27/2026			—			(12)			(12)
									Secured Debt			(9)			8/27/2021						8.78%			L +			6.50%						8/27/2026			2,333			2,288			2,270
									Secured Debt			(9)			8/27/2021						8.78%			L +			6.50%						8/27/2026			3,173			3,122			3,087
																																							5,398			5,345
RTIC Subsidiary Holdings, LLC			(10)			Direct-To-Consumer eCommerce Provider of Outdoor Products
									Secured Debt			(9)			9/1/2020						10.59%			L +			7.75%						9/1/2025			2,534			2,514			2,417
									Secured Debt			(9)			9/1/2020						10.03%			L +			7.75%						9/1/2025			16,838			16,708			16,062
																																							19,222			18,479
Rug Doctor, LLC.			(10)			Carpet Cleaning Products and Machinery
									Secured Debt			(9) (29)			7/16/2021						11.99%			SF +			8.25%			2.00%			11/16/2024			5,625			5,585			5,033
									Secured Debt			(9) (29)			7/16/2021						11.99%			SF +			8.25%			2.00%			11/16/2024			8,340			8,207			7,462
																																							13,792			12,495
Salient Partners L.P.			(11)			Provider of Asset Management Services
									Secured Debt			(9)			8/31/2018						9.67%			L +			6.00%						10/31/2022			6,251			6,250			5,039
									Secured Debt			(9)			9/30/2021						9.67%			L +			6.00%						10/31/2022			1,250			1,250			2,494
																																							7,500			7,533
Savers, Inc.			(11)			For-Profit Thrift Retailer
									Secured Debt			(9)			5/14/2021						9.17%			L +			5.50%						4/26/2028			11,315			11,223			10,918
SIB Holdings, LLC			(10)			Provider of Cost Reduction Services
									Secured Debt			(9) (29)			10/29/2021						8.81%			SF +			6.25%						10/29/2026			323			314			298
									Secured Debt			(9) (29)			10/29/2021						8.81%			SF +			6.25%						10/29/2026			1,573			1,545			1,451
									Secured Debt			(9) (29)			10/29/2021						8.14%			SF +			6.25%						10/29/2026			7,845			7,712			7,238
									Common Equity						10/29/2021			95,238																					200			200
																																							9,771			9,187
South Coast Terminals Holdings, LLC			(10)			Specialty Toll Chemical Manufacturer
									Secured Debt			(9) (25)			12/10/2021									L +			5.75%						12/13/2026			—			(75)			(75)
									Secured Debt			(9)			12/10/2021						8.74%			L +			5.75%						12/13/2026			41,359			40,664			40,772
									Common Equity						12/10/2021			863,636																					864			1,068
																																							41,453			41,765
SPAU Holdings, LLC			(10)			Digital Photo Product Provider
									Secured Debt			(9) (29) (25)			7/1/2022									SF +			7.50%						7/1/2027			—			(61)			(61)
									Secured Debt			(9) (29)			7/1/2022						9.58%			SF +			7.50%						7/1/2027			15,968			15,664			15,664
									Common Stock						7/1/2022			638,710																					639			639
																																							16,242			16,242

28

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Staples Canada ULC			(10) (13) (21)			Office Supplies Retailer
									Secured Debt			(9) (22)			9/14/2017						10.19%			L +			7.00%						9/12/2024			14,334			14,286			12,816
Stellant Systems, Inc.			(11)			Manufacturer of Traveling Wave Tubes and Vacuum Electronic Devices
									Secured Debt			(9) (29)			10/22/2021						8.41%			SF +			5.50%						10/1/2028			7,642			7,576			7,107
Student Resource Center, LLC			(10)			Higher Education Services
									Secured Debt			(9) (25)			6/25/2021									L +			8.00%						6/25/2026			—			(11)			(11)
									Secured Debt			(9)			9/30/2022						10.25%			L +			7.00%						6/25/2026			6,250			6,156			5,141
									Secured Debt			(9)			9/30/2022						11.75%			L +			9.50%						6/25/2026			4,338			4,271			1,286
																																							10,416			6,416
Tacala Investment Corp.			(33)			Quick Service Restaurant Group
									Secured Debt			(9) (32)			3/19/2021						6.62%			L +			3.50%						2/5/2027			1,979			1,979			1,855
Team Public Choices, LLC			(11)			Home-Based Care Employment Service Provider
									Secured Debt			(9)			12/22/2020						7.81%			L +			5.00%						12/18/2027			15,002			14,714			14,327
Tectonic Financial, LLC						Financial Services Organization
									Common Stock			(8)			5/15/2017			200,000																					2,000			5,630
Tex Tech Tennis, LLC			(10)			Sporting Goods & Textiles
									Common Stock			(30)			7/7/2021			1,000,000																					1,000			1,380
U.S. TelePacific Corp.			(11)			Provider of Communications and Managed Services
									Secured Debt			(9) (29)			5/17/2017						11.57%			SF +			8.50%			7.25%			5/2/2026			18,018			17,945			7,838
USA DeBusk LLC			(10)			Provider of Industrial Cleaning Services
									Secured Debt			(9)			10/22/2019						8.27%			L +			5.75%						9/8/2026			33,747			33,161			33,110
Veregy Consolidated, Inc.			(11)			Energy Service Company
									Secured Debt			(9) (25)			11/9/2020									L +			5.25%						11/3/2025			—			(685)			(685)
									Secured Debt			(9)			11/9/2020						8.81%			L +			6.00%						11/3/2027			17,685			17,365			16,845
																																							16,680			16,160
Vida Capital, Inc			(11)			Alternative Asset Manager

29

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Secured Debt						10/10/2019						9.12%			L +			6.00%						10/1/2026			15,794			15,648			12,372
Vistar Media, Inc.			(10)			Operator of Digital Out-of-Home Advertising Platform
									Preferred Stock						4/3/2019			70,207																					767			2,350
VORTEQ Coil Finishers, LLC			(10)			Specialty Coating of Aluminum and Light-Gauge Steel
									Secured Debt			(9)			11/30/2021						9.75%			L +			7.25%						11/30/2026			25,475			25,049			25,375
									Common Equity			(8)			11/30/2021			1,038,462																					1,038			3,110
																																							26,087			28,485
Wahoo Fitness Acquisition L.L.C.			(11)			Fitness Training Equipment Provider
									Secured Debt			(9) (29)			8/17/2021						9.57%			SF +			5.75%						8/12/2028			14,719			14,344			9,935
Wall Street Prep, Inc.			(10)			Financial Training Services
									Secured Debt			(9) (25)			7/19/2021									L +			7.00%						7/19/2026			—			(6)			(6)
									Secured Debt			(9)			7/19/2021						9.28%			L +			7.00%						7/19/2026			4,290			4,223			4,072
									Common Stock						7/19/2021			400,000																					400			310
																																							4,617			4,376
Watterson Brands, LLC			(10)			Facility Management Services
									Secured Debt			(9)			12/17/2021						9.63%			L +			6.00%						12/17/2026			371			332			359
									Secured Debt			(9)			12/17/2021						8.25%			L +			6.00%						12/17/2026			391			359			379
									Secured Debt			(9)			12/17/2021						8.25%			L +			6.00%						12/17/2026			28,957			28,568			28,056
																																							29,259			28,794
West Star Aviation Acquisition, LLC			(10)			Aircraft, Aircraft Engine and Engine Parts
									Secured Debt			(9) (29)			3/1/2022						8.59%			SF +			6.00%						3/1/2028			10,794			10,599			10,294
									Secured Debt			(9) (29) (25)			3/1/2022									SF +			6.00%						3/1/2028			—			(21)			(21)
									Common Stock						3/1/2022			1,541,400																					1,541			1,620
																																							12,119			11,893
Winter Services LLC			(10)			Provider of Snow Removal and Ice Management Services
									Secured Debt			(9) (25)			11/19/2021									L +			7.00%						11/19/2026			—			(36)			—
									Secured Debt			(9) (25)			11/19/2021									L +			7.00%						11/19/2026			—			(18)			(18)
									Secured Debt			(9)			11/19/2021						9.23%			L +			7.00%						11/19/2026			10,000			9,834			9,683
																																							9,780			9,665
Xenon Arc, Inc.			(10)			Tech-enabled Distribution Services to Chemicals and Food Ingredients Primary Producers
									Secured Debt			(25)			12/17/2021									L +			5.25%						12/17/2026			—			(138)			(138)
									Secured Debt			(25)			12/17/2021									L +			5.25%						12/17/2027			—			(206)			(206)

30

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Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (29)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Secured Debt						12/17/2021						8.63%			L +			5.25%						12/17/2027			38,311			37,660			36,845
																																							37,316			36,501
YS Garments, LLC			(11)			Designer and Provider of Branded Activewear
									Secured Debt			(9)			8/22/2018						7.92%			L +			5.50%						8/9/2024			12,659			12,613			12,121
Zips Car Wash, LLC			(10)			Express Car Wash Operator
									Secured Debt			(9) (29)			2/11/2022						9.94%			SF +			7.25%						3/1/2024			17,512			17,229			17,284
									Secured Debt			(9) (29) (33)			2/11/2022						9.86%			SF +			7.25%						3/1/2024			4,389			4,354			4,289
																																							21,583			21,573
Subtotal Non-Control/Non-Affiliate Investments (92.0% of net assets at fair value)																																							$	1,914,134		$	1,821,480
Total Portfolio Investments, September 30, 2022 (200.7% of net assets at fair value)																																							$	3,689,627		$	3,973,490

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

___________________

(1)All investments are Lower Middle Market portfolio investments, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Lower Middle Market portfolio investments. All of the Company’s investments, unless otherwise noted, are encumbered either as security for the Company’s Credit Facility or in support of the SBA-guaranteed debentures issued by the Funds.

(2)Debt investments are income producing, unless otherwise noted by footnote (14), as described below. Equity and warrants are non-income producing, unless otherwise noted by footnote (8), as described below.

(3)See Note C—Fair Value Hierarchy for Investments—Portfolio Composition and Schedule 12-14 for a summary of geographic location of portfolio companies.

(4)Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.

(5)Control investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained.

(6)Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments.

(7)Non-Control/Non-Affiliate investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.

(8)Income producing through dividends or distributions.

(9)Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 70% of the loans (based on the par amount) contain LIBOR or Term SOFR (“SOFR”) floors which range between 0.50% and 2.00%, with a weighted-average floor of 1.06%.

(10)Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments.

(11)Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments.

(12)Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments.

(13)Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.

(14)Non-accrual and non-income producing investment.

(15)All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities.”

(16)External Investment Manager. Investment is not encumbered as security for the Company's Credit Facility or in support of the SBA-guaranteed debentures issued by the Funds.

(17)Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.

(18)Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

(19)Investments may have a portion, or all, of their income received from Paid-in-Kind (“PIK”) interest or dividends. PIK interest income and cumulative dividend income represent income not paid currently in cash. The difference between the Total Rate and PIK Rate represents the cash rate as of September 30, 2022.

(20)All portfolio company headquarters are based in the United States, unless otherwise noted.

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

(21)Portfolio company headquarters are located outside of the United States.

(22)In connection with the Company's debt investment in Staples Canada ULC and in an attempt to mitigate any potential adverse change in foreign exchange rates during the term of the Company’s investment, the Company maintains a forward foreign currency contract with Cadence Bank to lend $17.6 million Canadian Dollars and receive $13.6 million U.S. Dollars with a settlement date of September 14, 2023. The unrealized appreciation on the forward foreign currency contract was $0.8 million as of September 30, 2022.

(23)The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of Prime plus 5.10% (Floor 2.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.

(24)Investment date represents the date of initial investment in the security position.

(25)The position is unfunded and no interest income is being earned as of September 30, 2022. The position may earn a nominal unused facility fee on committed amounts.

(26)Warrants are presented in equivalent units with a strike price of $14.28 per unit.

(27)Warrants are presented in equivalent shares/units with a strike price of $0.01 per share/unit.

(28)As of September 30, 2022, borrowings under the loan facility bore interest at SOFR+6.25% (Floor 1.00%). Due to an amendment and subsequent funding during the quarter, the term loan facility has different floating rate reset dates. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2022.

(29)A majority of the variable rate loans in the Company’s investment portfolio bear interest at a rate that may be determined by reference to either LIBOR (“L”), SOFR (“SF”) or an alternate Base Rate (commonly based on the Federal Funds Rate or the Prime Rate (“P”)), which typically resets every one, three, or six months at the borrower’s option. SOFR based contracts may include a credit spread adjustment (the “Adjustment”) that is charged in addition to the stated spread. The Adjustment is applied when the SOFR rate, plus the Adjustment, exceeds the stated floor rate, as applicable. As of September 30, 2022, SOFR based contracts in the portfolio had Adjustments ranging from 0.10% to 0.26%.

(30)Shares/Units represent ownership in a related Real Estate or HoldCo entity.

(31)Investment is not unitized. Presentation is made in percent of fully diluted ownership unless otherwise indicated.

(32)Short-term portfolio investments. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of short-term portfolio investments.

(33)As of September 30, 2022, borrowings under the loan facility bore interest at SOFR+7.25% (Floor 1.00%). Each new draw on the delayed draw term loan facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2022.

(34)The security has an effective contractual interest rate of 2.00% PIK + LIBOR+6.50%, Floor 1.00%, but the issuer may, in its discretion, elect to pay the PIK interest in cash. The rate presented represents the effective current yield based on actual payments received during the period.

(35)As of September 30, 2022, borrowings under the loan facility bore interest at LIBOR+6.50% PIK or Prime+5.50% PIK. Revolving facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2022.

(36)As of September 30, 2022, borrowings under the loan facility bore interest at SOFR+6.00% (Floor 1.00%) . Delayed draw term loan facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2022.

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2022

(dollars in thousands)

(Unaudited)

(37) Index based floating interest rate is subject to contractual maximum index rate of 1.50% as of September 30, 2022.

(38)Warrants are presented in equivalent shares/units with a strike price of $1.00 per share/unit.

(39)Portfolio company is in a bankruptcy process and, as such, the maturity date of our debt investment in this portfolio company will not be finally determined until such process is complete. As noted in footnote (14), our debt investment in this portfolio company is on non-accrual status.

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Control Investments (5)
Analytical Systems Keco Holdings, LLC						Manufacturer of Liquid and Gas Analyzers
									Secured Debt			(9)			8/16/2019						12.00		%	L +			10.00%						8/16/2024			$	4,945		$	4,736		$	4,736
									Preferred Member Units						8/16/2019			3,200																					3,200			—
									Preferred Member Units						5/20/2021			2,427																					2,427			4,894
									Warrants			(27)			8/16/2019			420															8/16/2029						316			—
																																							10,679			9,630
ASC Interests, LLC						Recreational and Educational Shooting Facility
									Secured Debt						12/31/2019						13.00		%										7/31/2022			200			200			200
									Secured Debt						8/1/2013						13.00		%										7/31/2022			1,650			1,636			1,636
									Member Units						8/1/2013			1,500																					1,500			720
																																							3,336			2,556
ATS Workholding, LLC			(10)			Manufacturer of Machine Cutting Tools and Accessories
									Secured Debt			(14)			11/16/2017						5.00		%										8/16/2023			4,794			4,635			3,005
									Preferred Member Units						11/16/2017			3,725,862																					3,726			—
																																							8,361			3,005
Barfly Ventures, LLC			(10)			Casual Restaurant Group
									Secured Debt						10/15/2020						7.00		%										10/31/2024			711			711			711
									Member Units						10/26/2020			37																					1,584			1,930
																																							2,295			2,641
Bolder Panther Group, LLC						Consumer Goods and Fuel Retailer
									Secured Debt			(9)			12/31/2020						10.50		%	L +			9.00%						12/31/2025			39,000			38,687			39,000
									Class A Preferred Member Units			(8)			12/31/2020						14.00		%																10,194			10,194
									Class B Preferred Member Units			(8)			12/31/2020			140,000			8.00		%																14,000			23,170
																																							62,881			72,364
Brewer Crane Holdings, LLC						Provider of Crane Rental and Operating Services
									Secured Debt			(9)			1/9/2018						11.00		%	L +			10.00%						1/9/2023			8,060			8,037			8,037
									Preferred Member Units			(8)			1/9/2018			2,950																					4,280			7,710
																																							12,317			15,747
Bridge Capital Solutions Corporation						Financial Services and Cash Flow Solutions Provider
									Secured Debt						7/25/2016						13.00		%										12/11/2024			8,813			8,813			8,813
									Warrants			(27)			7/25/2016			82															7/25/2026						2,132			4,060
									Secured Debt			(30)			7/25/2016						13.00		%										12/11/2024			1,000			1,000			1,000

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Preferred Member Units			(8) (30)			7/25/2016			17,742																					1,000			1,000
																																							12,945			14,873
Café Brazil, LLC						Casual Restaurant Group
									Member Units			(8)			6/9/2006			1,233																					1,742			2,570
California Splendor Holdings LLC						Processor of Frozen Fruits
									Secured Debt			(9)			3/30/2018						11.00		%	L +			10.00%						3/30/2023			28,000			27,915			27,915
									Preferred Member Units			(8)			7/31/2019			6,725			15.00		%							15.00		%							9,510			9,510
									Preferred Member Units			(8)			3/30/2018			6,157																					10,775			13,275
																																							48,200			50,700
CBT Nuggets, LLC						Produces and Sells IT Training Certification Videos
									Member Units			(8)			6/1/2006			416																					1,300			50,620
Centre Technologies Holdings, LLC						Provider of IT Hardware Services and Software Solutions
									Secured Debt			(9)			1/4/2019						12.00		%	L +			10.00%						1/4/2024			9,416			9,370			8,864
									Preferred Member Units						1/4/2019			12,696																					5,840			5,840
																																							15,210			14,704
Chamberlin Holding LLC						Roofing and Waterproofing Specialty Contractor
									Secured Debt			(9)			2/26/2018						9.00		%	L +			8.00%						2/26/2023			17,817			17,738			17,817
									Member Units			(8)			2/26/2018			4,347																					11,440			24,140
									Member Units			(8) (30)			11/2/2018			1,047,146																					1,322			1,540
																																							30,500			43,497
Charps, LLC						Pipeline Maintenance and Construction
									Unsecured Debt						8/26/2020						10.00		%										1/31/2024			5,694			4,599			5,694
									Preferred Member Units			(8)			2/3/2017			1,829																					1,963			13,990
																																							6,562			19,684
Clad-Rex Steel, LLC						Specialty Manufacturer of Vinyl-Clad Metal
									Secured Debt			(9)			12/20/2016						10.50		%	L +			9.50%						1/15/2024			10,480			10,401			10,401
									Member Units			(8)			12/20/2016			717																					7,280			10,250
									Secured Debt						12/20/2016						10.00		%										12/20/2036			1,081			1,071			1,071
									Member Units			(30)			12/20/2016			800																					210			530
																																							18,962			22,252
CMS Minerals Investments						Oil & Gas Exploration & Production

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Member Units			(8) (30)			4/1/2016			100																					1,838			1,974
Cody Pools, Inc.						Designer of Residential and Commercial Pools
									Secured Debt			(9)			3/6/2020						12.25		%	L +			10.50%						12/17/2026			42,497			42,117			42,484
									Preferred Member Units			(8) (30)			3/6/2020			587																					8,317			47,640
																																							50,434			90,124
Colonial Electric Company LLC						Provider of Electrical Contracting Services
									Secured Debt						3/31/2021						12.00		%										3/31/2026			24,570			24,351			24,351
									Preferred Member Units			(8)			3/31/2021			17,280																					7,680			9,130
																																							32,031			33,481
CompareNetworks Topco, LLC						Internet Publishing and Web Search Portals
									Secured Debt			(9)			1/29/2019						10.00		%	L +			9.00%						1/29/2024			6,477			6,452			6,477
									Preferred Member Units			(8)			1/29/2019			1,975																					1,975			12,000
																																							8,427			18,477
Copper Trail Fund Investments			(12) (13)			Investment Partnership
									LP Interests (CTMH, LP)			(31)			7/17/2017			38.8		%																			710			710
Datacom, LLC						Technology and Telecommunications Provider
									Secured Debt						3/31/2021						5.00		%										12/31/2025			8,892			8,296			7,668
									Preferred Member Units						3/31/2021			9,000																					2,610			2,610
																																							10,906			10,278
Digital Products Holdings LLC						Designer and Distributor of Consumer Electronics
									Secured Debt			(9)			4/1/2018						11.00		%	L +			10.00%						4/1/2023			16,853			16,801			16,801
									Preferred Member Units			(8)			4/1/2018			3,857																					9,501			9,835
																																							26,302			26,636
Direct Marketing Solutions, Inc.						Provider of Omni-Channel Direct Marketing Services
									Secured Debt			(9)			2/13/2018						12.00		%	L +			11.00%						2/13/2024			24,070			23,911			24,048
									Preferred Stock			(8)			2/13/2018			8,400																					8,400			18,350
																																							32,311			42,398
Gamber-Johnson Holdings, LLC						Manufacturer of Ruggedized Computer Mounting Systems
									Secured Debt			(9)			6/24/2016						9.50		%	L +			7.50%						1/1/2025			21,598			21,535			21,598
									Member Units			(8)			6/24/2016			9,042																					17,692			49,700
																																							39,227			71,298
Garreco, LLC						Manufacturer and Supplier of Dental Products
									Secured Debt			(9) (35)			7/15/2013						9.00		%	L +			8.00%						7/31/2022			4,196			4,196			4,196
									Member Units			(8)			7/15/2013			1,200																					1,200			2,270

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
																																							5,396			6,466
GRT Rubber Technologies LLC						Manufacturer of Engineered Rubber Products
									Secured Debt						12/19/2014						8.10		%	L +			8.00%						10/29/2026			38,885			38,672			38,885
									Member Units			(8)			12/19/2014			5,879																					13,065			46,190
																																							51,737			85,075
Gulf Manufacturing, LLC						Manufacturer of Specialty Fabricated Industrial Piping Products
									Member Units			(8)			8/31/2007			438																					2,980			5,640
Gulf Publishing Holdings, LLC						Energy Industry Focused Media and Publishing
									Secured Debt			(9) (17)			9/29/2017						10.50		%	L +			9.50%			5.25		%	9/30/2020			257			257			257
									Secured Debt			(17)			4/29/2016						12.50		%							6.25		%	4/29/2021			13,565			13,565			9,717
									Member Units						4/29/2016			3,681																					3,681			—
																																							17,503			9,974
Harris Preston Fund Investments			(12) (13)			Investment Partnership
									LP Interests (2717 MH, L.P.)			(31)			10/1/2017			49.3		%																			2,703			3,971
Harrison Hydra-Gen, Ltd.						Manufacturer of Hydraulic Generators
									Common Stock						6/4/2010			107,456																					718			3,530
Jensen Jewelers of Idaho, LLC						Retail Jewelry Store
									Secured Debt			(9)			11/14/2006						10.00		%	P +			6.75%						11/14/2023			2,550			2,536			2,550
									Member Units			(8)			11/14/2006			627																					811			12,420
																																							3,347			14,970
Johnson Downie Opco, LLC						Executive Search Services
									Secured Debt			(9)			12/10/2021						13.00		%	L +			11.50%						12/10/2026			11,475			11,344			11,344
									Preferred Equity						12/10/2021			3,150																					3,150			3,150
																																							14,494			14,494
KBK Industries, LLC						Manufacturer of Specialty Oilfield and Industrial Products
									Member Units			(8)			1/23/2006			325																					783			13,620
Kickhaefer Manufacturing Company, LLC						Precision Metal Parts Manufacturing
									Secured Debt						10/31/2018						11.50		%										10/31/2023			20,415			20,324			20,324
									Member Units						10/31/2018			581																					12,240			12,310
									Secured Debt						10/31/2018						9.00		%										10/31/2048			3,915			3,876			3,876
									Member Units			(8) (30)			10/31/2018			800																					992			2,460
																																							37,432			38,970

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Market Force Information, LLC						Provider of Customer Experience Management Services
									Secured Debt			(9)			7/28/2017						12.00		%	L +			11.00%						7/28/2023			3,400			3,400			3,400
									Secured Debt			(17)			7/28/2017						12.00		%							12.00		%	7/28/2023			26,079			25,952			8,936
									Member Units						7/28/2017			743,921																					16,642			—
																																							45,994			12,336
MH Corbin Holding LLC						Manufacturer and Distributor of Traffic Safety Products
									Secured Debt						8/31/2015						13.00		%										3/31/2022			8,250			8,241			5,934
									Preferred Member Units						3/15/2019			66,000																					4,400			—
									Preferred Member Units						9/1/2015			4,000																					6,000			—
																																							18,641			5,934
MS Private Loan Fund I, LP			(12) (13)			Investment Partnership
									Unsecured Debt						2/11/2021						5.00		%										2/28/2022			63,151			63,151			63,151
									LP Interests			(31)			1/26/2021			12.1		%																			2,500			2,581
																																							65,651			65,732
MSC Adviser I, LLC			(16)			Third Party Investment Advisory Services
									Member Units			(8)			11/22/2013																								29,500			140,400
Mystic Logistics Holdings, LLC						Logistics and Distribution Services Provider for Large Volume Mailers
									Secured Debt						8/18/2014						12.00		%										1/17/2022			6,378			6,377			6,378
									Common Stock			(8)			8/18/2014			5,873																					2,720			8,840
																																							9,097			15,218
NAPCO Precast, LLC						Precast Concrete Manufacturing
									Member Units			(8)			1/31/2008			2,955																					2,975			13,560
Nebraska Vet AcquireCo, LLC						Mixed-Animal Veterinary and Animal Health Product Provider
									Secured Debt						12/31/2020						12.00		%										12/31/2025			10,500			10,412			10,412
									Secured Debt						12/31/2020						12.00		%										12/31/2025			4,868			4,829			4,829
									Preferred Member Units						12/31/2020			6,987																					6,987			7,700

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
																																							22,228			22,941
NexRev LLC						Provider of Energy Efficiency Products & Services
									Secured Debt						2/28/2018						11.00		%										2/28/2023			16,217			16,173			14,045
									Preferred Member Units			(8)			2/28/2018			86,400,000																					6,880			2,690
																																							23,053			16,735
NRP Jones, LLC						Manufacturer of Hoses, Fittings and Assemblies
									Secured Debt						12/21/2017						12.00		%										3/20/2023			2,080			2,080			2,080
									Member Units			(8)			12/22/2011			65,962																					3,717			6,440
																																							5,797			8,520
NuStep, LLC						Designer, Manufacturer and Distributor of Fitness Equipment
									Secured Debt			(9)			1/31/2017						7.50		%	L +			6.50%						1/31/2025			1,720			1,720			1,720
									Secured Debt						1/31/2017						11.00		%										1/31/2025			17,240			17,236			17,240
									Preferred Member Units						1/31/2017			406																					10,200			13,500
																																							29,156			32,460
OMi Topco, LLC									Manufacturer of Overhead Cranes
									Secured Debt						8/31/2021						12.00		%										8/31/2026			18,000			17,831			18,000
									Preferred Member Units			(8)			4/1/2008			900																					1,080			20,210
																																							18,911			38,210
Orttech Holdings, LLC						Distributor of Industrial Clutches, Brakes and Other Components
									Secured Debt			(9)			7/30/2021						12.00		%	L +			11.00%						7/31/2026			24,375			24,151			24,151
									Preferred Stock			(8) (30)			7/30/2021			10,000																					10,000			10,000
																																							34,151			34,151
Pearl Meyer Topco LLC						Provider of Executive Compensation Consulting Services
									Secured Debt						4/27/2020						12.00		%										4/27/2025			32,674			32,438			32,674
									Member Units			(8)			4/27/2020			13,800																					13,000			26,970
																																							45,438			59,644
PPL RVs, Inc.						Recreational Vehicle Dealer
									Secured Debt			(9)			10/31/2019						7.50		%	L +			7.00%						11/15/2022			750			726			726
									Secured Debt			(9)			11/15/2016						7.50		%	L +			7.00%						11/15/2022			11,655			11,655			11,655
									Common Stock			(8)			6/10/2010			2,000																					2,150			14,360
																																							14,531			26,741
Principle Environmental, LLC						Noise Abatement Service Provider
									Secured Debt						2/1/2011						13.00		%										11/15/2026			1,473			1,465			1,465
									Secured Debt						7/1/2011						13.00		%										11/15/2026			5,924			5,808			5,808

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Preferred Member Units						2/1/2011			21,806																					5,709			11,160
									Common Stock						1/27/2021			1,037																					1,200			710
																																							14,182			19,143
Quality Lease Service, LLC						Provider of Rigsite Accommodation Unit Rentals and Related Services
									Member Units						6/8/2015			1,000																					9,213			2,149
River Aggregates, LLC						Processor of Construction Aggregates
									Member Units			(8) (30)			12/20/2013			1,500																					369			3,280
Robbins Bros. Jewelry, Inc.						Bridal Jewelry Retailer
									Secured Debt			(9)			12/15/2021						12.00		%	L +			11.00%						12/15/2026			36,360			35,956			35,956
									Preferred Equity						12/15/2021			11,070																					11,070			11,070
																																							47,026			47,026
Tedder Industries, LLC						Manufacturer of Firearm Holsters and Accessories
									Secured Debt						8/31/2018						12.00		%										8/31/2022			16,240			16,181			16,181
									Preferred Member Units						8/31/2018			505																					8,579			8,579
																																							24,760			24,760
Televerde, LLC						Provider of Telemarketing and Data Services
									Member Units						1/6/2011			460																					1,290			7,280
Trantech Radiator Topco, LLC						Transformer Cooling Products and Services
									Secured Debt						5/31/2019						12.00		%										5/31/2024			8,720			8,663			8,712
									Common Stock			(8)			5/31/2019			615																					4,655			8,660
																																							13,318			17,372
UnionRock Energy Fund II, LP			(12) (13)			Investment Partnership
									LP Interests			(8) (31)			6/15/2020			49.6		%																			3,828			6,122
Vision Interests, Inc.						Manufacturer / Installer of Commercial Signage
									Series A Preferred Stock						12/23/2011			3,000,000																					3,000			3,000
VVS Holdco LLC						Omnichannel Retailer of Animal Health Products
									Secured Debt			(9)(30)			12/1/2021						7.00		%	L +			6.00%						12/1/2026			1,200			1,170			1,169

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Secured Debt			(30)			12/1/2021						11.50		%										12/1/2026			30,400			30,100			30,100
									Preferred Equity			(30)			12/1/2021			11,840																					11,840			11,840
																																							43,110			43,109
Ziegler’s NYPD, LLC						Casual Restaurant Group
									Secured Debt						6/1/2015						12.00		%										10/1/2022			625			625			625
									Secured Debt						10/1/2008						6.50		%										10/1/2022			1,000			1,000			1,000
									Secured Debt						10/1/2008						14.00		%										10/1/2022			2,750			2,750			2,750
									Preferred Member Units						6/30/2015			10,072																					2,834			2,130
									Warrants			(27)			7/1/2015			587															10/1/2025						600			—
																																							7,809			6,505
Subtotal Control Investments (83.3% of net assets at fair value)																																							$	1,107,597		$	1,489,257
Affiliate Investments (6)
AAC Holdings, Inc.			(11)			Substance Abuse Treatment Service Provider
									Secured Debt						12/11/2020						18.00		%							8.00		%	6/25/2025			$	10,202		$	10,011		$	9,794
									Common Stock						12/11/2020			593,928																					3,148			2,079
									Warrants			(27)			12/11/2020			554,353															12/11/2025						—			1,940
																																							13,159			13,813
AFG Capital Group, LLC						Provider of Rent-to-Own Financing Solutions and Services
									Secured Debt						4/25/2019						10.00		%										5/25/2022			144			144			144
									Preferred Member Units			(8)			11/7/2014			186																					1,200			7,740
																																							1,344			7,884
ATX Networks Corp.			(11)			Provider of Radio Frequency Management Equipment
									Secured Debt			(9)			9/1/2021						8.50		%	L +			7.50%						9/1/2026			7,667			7,092			7,092
									Unsecured Debt						9/1/2021						10.00		%							10.00		%	9/1/2028			3,067			1,963			1,963
									Common Stock						9/1/2021			583																					—			—
																																							9,055			9,055

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
BBB Tank Services, LLC						Maintenance, Repair and Construction Services to the Above-Ground Storage Tank Market
									Unsecured Debt			(9) (17)			4/8/2016						12.00		%	L +			11.00%						4/8/2021			4,800			4,800			2,508
									Preferred Stock (non-voting)			(8)			12/17/2018						15.00		%							15.00		%							162			—
									Member Units						4/8/2016			800,000																					800			—
																																							5,762			2,508
Boccella Precast Products LLC						Manufacturer of Precast Hollow Core Concrete
									Secured Debt						9/23/2021						10.00		%										2/28/2027			320			320			320
									Member Units			(8)			6/30/2017			2,160,000																					2,256			4,830
																																							2,576			5,150
Brightwood Capital Fund Investments			(12) (13)			Investment Partnership
									LP Interests (Brightwood Capital Fund V, LP)			(31)			7/12/2021			15.8		%																			1,000			1,000
Buca C, LLC						Casual Restaurant Group
									Secured Debt			(9) (17)			6/30/2015						10.25		%	L +			9.25%						6/30/2020			19,491			19,491			14,370
									Preferred Member Units						6/30/2015			6			6.00		%							6.00		%							4,770			—
																																							24,261			14,370
Career Team Holdings, LLC						Provider of Workforce Training and Career Development Services
									Secured Debt						12/17/2021						12.50		%										12/17/2026			20,250			20,050			20,050
									Class A Common Units						12/17/2021			450,000																					4,500			4,500
																																							24,550			24,550
Chandler Signs Holdings, LLC			(10)			Sign Manufacturer
									Class A Units						1/4/2016			1,500,000																					1,500			460
Classic H&G Holdings, LLC						Provider of Engineered Packaging Solutions
									Secured Debt			(9)			3/12/2020						7.00		%	L +			6.00%						3/12/2025			4,000			4,000			4,000
									Secured Debt						3/12/2020						8.00		%										3/12/2025			19,274			19,139			19,274
									Preferred Member Units			(8)			3/12/2020			154																					5,760			15,260
																																							28,899			38,534
Congruent Credit Opportunities Funds			(12) (13)			Investment Partnership
									LP Interests (Congruent Credit Opportunities Fund III, LP)			(8) (31)			2/4/2015			17.4		%																			10,256			9,959
DMA Industries, LLC						Distributor of aftermarket ride control products
									Secured Debt						11/19/2021						12.00		%										11/19/2026			21,200			20,993			20,993

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Preferred Equity						11/19/2021			5,944																					5,944			5,944
																																							26,937			26,937
Dos Rios Partners			(12) (13)			Investment Partnership
									LP Interests (Dos Rios Partners, LP)			(31)			4/25/2013			20.2		%																			6,605			10,329
									LP Interests (Dos Rios Partners - A, LP)			(31)			4/25/2013			6.4		%																			2,097			3,280
																																							8,702			13,609
Dos Rios Stone Products LLC			(10)			Limestone and Sandstone Dimension Cut Stone Mining Quarries
									Class A Preferred Units			(30)			6/27/2016			2,000,000																					2,000			640
EIG Fund Investments			(12) (13)			Investment Partnership
									LP Interests (EIG Global Private Debt Fund-A, L.P.)			(8) (31)			11/6/2015			5,000,000																					594			547
Flame King Holdings, LLC						Propane Tank and Accessories Distributor
									Secured Debt			(9)			10/29/2021						7.50		%	L +			6.50%						10/31/2026			6,400			6,324			6,324
									Secured Debt			(9)			10/29/2021						12.00		%	L +			11.00%						10/31/2026			21,200			20,996			20,996
									Preferred Equity						10/29/2021			9,360																					10,400			10,400
																																							37,720			37,720
Freeport Financial Funds			(12) (13)			Investment Partnership
									LP Interests (Freeport Financial SBIC Fund LP)			(31)			3/23/2015			9.3		%																			5,974			6,078
									LP Interests (Freeport First Lien Loan Fund III LP)			(8) (31)			7/31/2015			6.0		%																			7,629			7,231
																																							13,603			13,309
GFG Group, LLC.						Grower and Distributor of a Variety of Plants and Products to Other Wholesalers, Retailers and Garden Centers
									Secured Debt						3/31/2021						12.00		%										3/31/2026			12,545			12,435			12,545
									Preferred Member Units			(8)			3/31/2021			226																					4,900			6,990
																																							17,335			19,535
Harris Preston Fund Investments			(12) (13)			Investment Partnership
									LP Interests (HPEP 3, L.P.)			(31)			8/9/2017			8.2		%																			3,193			4,712
Hawk Ridge Systems, LLC			(13)			Value-Added Reseller of Engineering Design and Manufacturing Solutions
									Secured Debt			(9)			12/2/2016						7.00		%	L +			6.00%						1/15/2026			2,585			2,585			2,585
									Secured Debt						12/2/2016						8.00		%										1/15/2026			34,800			34,672			34,800

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Preferred Member Units			(8)			12/2/2016			226																					2,850			14,680
									Preferred Member Units			(30)			12/2/2016			226																					150			770
																																							40,257			52,835
Houston Plating and Coatings, LLC						Provider of Plating and Industrial Coating Services
									Unsecured Convertible Debt						5/1/2017						8.00		%										5/1/2022			3,000			3,000			2,960
									Member Units			(8)			1/8/2003			322,297																					2,352			3,210
																																							5,352			6,170
I-45 SLF LLC			(12) (13)			Investment Partnership
									Member Units (Fully diluted 20.0%; 24.40% profits interest) (8)			(8)			10/20/2015																								19,000			14,387
Iron-Main Investments, LLC						Consumer Reporting Agency Providing Employment Background Checks and Drug Testing
									Secured Debt						8/3/2021						13.00		%										8/1/2026			4,600			4,557			4,557
									Secured Debt						9/1/2021						12.50		%										9/1/2026			3,200			3,170			3,170
									Secured Debt						8/3/2021						12.50		%										11/30/2026			20,000			19,805			19,805
									Secured Debt						8/3/2021						12.50		%							12.50		%	3/31/2022			8,944			8,944			8,944
									Common Stock						8/3/2021			179,778																					1,798			1,798
																																							38,274			38,274
L.F. Manufacturing Holdings, LLC			(10)			Manufacturer of Fiberglass Products
									Preferred Member Units (non-voting)			(8)			1/1/2019						14.00		%							14.00		%							107			107
									Member Units						12/23/2013			2,179,001																					2,019			2,557
																																							2,126			2,664
OnAsset Intelligence, Inc.						Provider of Transportation Monitoring / Tracking Products and Services
									Secured Debt						5/20/2014						12.00		%							12.00		%	12/31/2022			935			935			935
									Secured Debt						3/21/2014						12.00		%							12.00		%	12/31/2022			954			954			954
									Secured Debt						5/10/2013						12.00		%							12.00		%	12/31/2022			2,055			2,055			2,055
									Secured Debt						4/18/2011						12.00		%							12.00		%	12/31/2022			4,286			4,286			4,286
									Unsecured Debt						6/5/2017						10.00		%							10.00		%	12/31/2022			192			192			192
									Preferred Stock						4/18/2011			912			7.00		%							7.00		%							1,981			—

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Common Stock						4/15/2021			635																					830			—
									Warrants			(27)			4/18/2011			4,699															5/10/2023						1,089			—
																																							12,322			8,422
Oneliance, LLC						Construction Cleaning Company
									Secured Debt			(9)			8/6/2021						12.00		%	L +			11.00%						8/6/2026			5,600			5,547			5,547
									Preferred Stock						8/6/2021			1,056																					1,056			1,056
																																							6,603			6,603
Rocaceia, LLC (Quality Lease and Rental Holdings, LLC)						Provider of Rigsite Accommodation Unit Rentals and Related Services
									Secured Debt			(14) (17) (36)			6/30/2015						12.00		%										1/8/2018			30,369			29,865			—
									Preferred Member Units						1/8/2013			250																					2,500			—
																																							32,365			—
SI East, LLC						Rigid Industrial Packaging Manufacturing
									Secured Debt						8/31/2018						10.25		%										8/31/2023			65,850			65,738			65,850
									Preferred Member Units			(8)			8/31/2018			157																					1,218			11,570
																																							66,956			77,420
Slick Innovations, LLC						Text Message Marketing Platform
									Secured Debt						9/13/2018						13.00		%										9/13/2023			5,320			5,248			5,320
									Common Stock						9/13/2018			70,000																					700			1,510
									Warrants			(27)			9/13/2018			18,084															9/13/2028						181			400
																																							6,129			7,230
Sonic Systems International, LLC			(10)			Nuclear Power Staffing Services
									Secured Debt			(9)			8/20/2021						8.50		%	L +			7.50%						8/20/2026			11,982			11,757			11,757
									Common Stock						8/20/2021			7,866																					1,070			1,070
																																							12,827			12,827
Superior Rigging & Erecting Co.						Provider of Steel Erecting, Crane Rental & Rigging Services
									Secured Debt						8/31/2020						12.00		%										8/31/2025			21,500			21,332			21,332
									Preferred Member Units						8/31/2020			1,571																					4,500			4,500
																																							25,832			25,832
The Affiliati Network, LLC						Performance Marketing Solutions
									Secured Debt						8/9/2021						7.00		%										8/9/2026			280			262			262
									Secured Debt						8/9/2021						11.83		%										8/9/2026			12,961			12,834			12,834
									Preferred Stock			(8)			8/9/2021			1,280,000																					6,400			6,400
																																							19,496			19,496
UniTek Global Services, Inc.			(11)			Provider of Outsourced Infrastructure Services
									Secured Debt			(9)			10/15/2018						8.50		%	L +			5.50%			2.00		%	8/20/2024			397			396			371
									Secured Debt			(9)			8/27/2018						8.50		%	L +			5.50%			2.00		%	8/20/2024			1,986			1,974			1,852
									Secured Convertible Debt						1/1/2021						15.00		%							15.00		%	2/20/2025			1,197			1,197			2,375

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Preferred Stock			(8)			8/29/2019			1,133,102			20.00		%							20.00		%							1,757			2,833
									Preferred Stock						8/21/2018			1,521,122			20.00		%							20.00		%							2,188			1,498
									Preferred Stock						1/15/2015			4,336,866			13.50		%							13.50		%							7,924			—
									Preferred Stock						6/30/2017			2,281,682			19.00		%							19.00		%							3,667			—
									Common Stock						4/1/2020			945,507																					—			—
																																							19,103			8,929
Universal Wellhead Services Holdings, LLC			(10)			Provider of Wellhead Equipment, Designs, and Personnel to the Oil & Gas Industry
									Preferred Member Units			(30)			12/7/2016			716,949			14.00		%							14.00		%							1,032			—
									Member Units			(30)			12/7/2016			4,000,000																					4,000			—
																																							5,032			—
Volusion, LLC						Provider of Online Software-as-a-Service eCommerce Solutions
									Secured Debt			(17)			1/26/2015						11.50		%										1/26/2020			17,434			17,434			17,434
									Unsecured Convertible Debt						5/16/2018						8.00		%										11/16/2023			409			409			409
									Preferred Member Units						1/26/2015			4,876,670																					14,000			5,990
									Warrants			(27)			1/26/2015			1,831,355															1/26/2025						2,576			—
																																							34,419			23,833
Subtotal Affiliate Investments (30.7% of net assets at fair value)																																							$	578,539		$	549,214
Non-Control/Non-Affiliate Investments (7)
Acousti Engineering Company of Florida			(10)			Interior Subcontractor Providing Acoustical Walls and Ceilings
									Secured Debt			(9)			11/2/2020						10.00		%	L +			8.50%						11/2/2025			$	12,111		$	12,005		$	12,111
									Secured Debt			(9)			5/26/2021						14.00		%	L +			12.50%						11/2/2025			850			841			850
																																							12,846			12,961
ADS Tactical, Inc.			(11)			Value-Added Logistics and Supply Chain Provider to the Defense Industry
									Secured Debt			(9)			3/29/2021						6.75		%	L +			5.75%						3/19/2026			22,136			21,734			22,012
American Health Staffing Group, Inc.			(10)			Healthcare Temporary Staffing
									Secured Debt			(9)			11/19/2021						7.00		%	L +			6.00%						11/19/2026			7,067			6,988			6,988

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
American Nuts, LLC			(10)			Roaster, Mixer and Packager of Bulk Nuts and Seeds
									Secured Debt			(9)			12/21/2018						9.00		%	L +			8.00%						4/10/2025			12,017			11,854			12,017
American Teleconferencing Services, Ltd.			(11)			Provider of Audio Conferencing and Video Collaboration Solutions
									Secured Debt			(9) (14) (17)			9/17/2021						7.50		%	L +			6.50%						9/9/2021			2,980			2,980			89
									Secured Debt			(9) (14)			5/19/2016						7.50		%	L +			6.50%						6/28/2023			14,370			13,706			431
																																							16,686			520
ArborWorks, LLC			(10)			Vegetation Management Services
									Secured Debt			(9)			11/9/2021						8.00		%	L +			7.00%						11/9/2026			32,605			31,873			31,873
									Common Equity						11/9/2021			234																					234			234
																																							32,107			32,107
Arrow International, Inc			(10)			Manufacturer and Distributor of Charitable Gaming Supplies
									Secured Debt			(9) (23)			12/21/2020						9.18		%	L +			7.93%						12/21/2025			22,500			22,300			22,500
AVEX Aviation Holdings, LLC			(10)			Specialty Aircraft Dealer
									Secured Debt			(9)			12/15/2021						7.50		%	L +			6.50%						12/15/2026			13,320			13,005			13,005
									Common Equity						12/15/2021			360																					360			360
																																							13,365			13,365
Berry Aviation, Inc.			(10)			Charter Airline Services
									Secured Debt						7/6/2018						12.00		%							1.50		%	1/6/2024			4,694			4,674			4,694
									Preferred Member Units			(8)(30)			11/12/2019			122,416			16.00		%							16.00		%							168			208
									Preferred Member Units			(30)			7/6/2018			1,548,387			8.00		%							8.00		%							1,671			2,487
																																							6,513			7,389
Binswanger Enterprises, LLC			(10)			Glass Repair and Installation Service Provider
									Secured Debt			(9)			3/10/2017						9.50		%	L +			8.50%						3/10/2023			12,194			12,107			12,194
									Member Units						3/10/2017			1,050,000																					1,050			730
																																							13,157			12,924
Bluestem Brands, Inc.			(11)			Multi-Channel Retailer of General Merchandise
									Secured Debt			(9)			8/28/2020						10.00		%	L +			8.50%						8/28/2025			5,357			5,357			5,337
									Common Stock			(8)			10/1/2020			723,184																					1			1,515
																																							5,358			6,852
Brainworks Software, LLC			(10)			Advertising Sales and Newspaper Circulation Software
									Secured Debt			(9) (14) (17)			8/12/2014						12.50		%	P +			9.25%						7/22/2019			7,817			7,817			4,201

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Brightwood Capital Fund Investments			(12) (13)			Investment Partnership
									LP Interests (Brightwood Capital Fund III, LP)			(8) (31)			7/21/2014			1.6		%																			7,200			4,269
									LP Interests (Brightwood Capital Fund IV, LP)			(8) (31)			10/26/2016			0.6		%																			4,350			4,394
																																							11,550			8,663
Burning Glass Intermediate Holding Company, Inc.			(10)			Provider of Skills-Based Labor Market Analytics
									Secured Debt			(9)			6/14/2021						6.00		%	L +			5.00%						6/10/2026			465			429			429
									Secured Debt			(9)			6/14/2021						6.00		%	L +			5.00%						6/10/2028			20,134			19,803			19,985
																																							20,232			20,414
Cadence Aerospace LLC			(10)			Aerostructure Manufacturing
									Secured Debt			(32)			11/14/2017						9.28		%							0.22		%	11/14/2023			28,540			28,399			26,767
CAI Software LLC						Provider of Specialized Enterprise Resource Planning Software
									Preferred Equity						12/13/2021			1,788,527																					1,789			1,789
									Preferred Equity						12/13/2021			596,176																					—			—
																																							1,789			1,789
Camin Cargo Control, Inc.			(11)			Provider of Mission Critical Inspection, Testing and Fuel Treatment Services
									Secured Debt			(9)			6/14/2021						7.50		%	L +			6.50%						6/4/2026			15,920			15,775			15,840
Cenveo Corporation			(11)			Provider of Digital Marketing Agency Services
									Common Stock						9/7/2018			322,907																					6,183			2,852
Chisholm Energy Holdings, LLC			(10)			Oil & Gas Exploration & Production
									Secured Debt			(9)			5/15/2019						7.75		%	L +			6.25%						5/15/2026			2,857			2,804			2,663
Clarius BIGS, LLC			(10)			Prints & Advertising Film Financing
									Secured Debt			(14) (17)			9/23/2014						15.00		%							15.00		%	1/5/2015			2,756			2,756			33
Computer Data Source, LLC			(10)			Third Party Maintenance Provider to the Data Center Ecosystem
									Secured Debt			(9)			8/6/2021						8.50		%	L +			7.50%						8/6/2026			21,681			21,234			21,234
Construction Supply Investments, LLC			(10)			Distribution Platform of Specialty Construction Materials to Professional Concrete and Masonry Contractors
									Member Units			(8)			12/29/2016			861,618																					3,335			14,640

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Darr Equipment LP			(10)			Heavy Equipment Dealer
									Secured Debt						12/26/2017						12.50		%							1.00		%	6/22/2023			4,685			4,685			4,227
									Warrants			(28)			4/15/2014			915,734															12/23/2023						474			160
																																							5,159			4,387
DTE Enterprises, LLC			(10)			Industrial Powertrain Repair and Services
									Secured Debt			(9)			4/13/2018						9.50		%	L +			8.00%						4/13/2023			9,324			9,259			8,884
									Class AA Preferred Member Units (non-voting)			(9)			4/13/2018						10.00		%							10.00		%							1,051			1,051
									Class A Preferred Member Units						4/13/2018			776,316			8.00		%							8.00		%							776			320
																																							11,086			10,255
Dynamic Communities, LLC			(10)			Developer of Business Events and Online Community Groups
									Secured Debt			(9)			7/17/2018						9.50		%	L +			8.50%						7/17/2023			5,681			5,638			5,569
Eastern Wholesale Fence LLC			(10)			Manufacturer and Distributor of Residential and Commercial Fencing Solutions
									Secured Debt			(9)			11/19/2020						8.00		%	L +			7.00%						10/30/2025			31,810			31,238			31,810
EnCap Energy Fund Investments			(12) (13)			Investment Partnership
									LP Interests (EnCap Energy Capital Fund VIII, L.P.)			(8) (31)			1/22/2015			0.1		%																			3,745			1,599
									LP Interests (EnCap Energy Capital Fund VIII Co- Investors, L.P.)			(31)			1/21/2015			0.4		%																			2,097			777
									LP Interests (EnCap Energy Capital Fund IX, L.P.)			(8) (31)			1/22/2015			0.1		%																			4,047			2,284
									LP Interests (EnCap Energy Capital Fund X, L.P.)			(8) (31)			3/25/2015			0.1		%																			8,443			8,276
									LP Interests (EnCap Flatrock Midstream Fund II, L.P.)			(31)			3/30/2015			0.8		%																			6,582			2,796
									LP Interests (EnCap Flatrock Midstream Fund III, L.P.)			(8) (31)			3/27/2015			0.2		%																			6,082			5,064
																																							30,996			20,796
EPIC Y-Grade Services, LP			(11)			NGL Transportation & Storage
									Secured Debt			(9)			6/22/2018						7.00		%	L +			6.00%						6/30/2027			6,892			6,819			5,862
Event Holdco, LLC			(10)			Event and Learning Management Software for Healthcare Organizations and Systems
									Secured Debt			(9)(30)			12/22/2021						8.00		%	L +			7.00%						12/22/2026			51,692			51,135			51,135

50

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Flip Electronics LLC			(10)			Distributor of Hard-to-Find and Obsolete Electronic Components
									Secured Debt			(9) (33)			1/4/2021						9.09		%	L +			8.09%						1/2/2026			5,400			5,304			5,287
Fortna Acquisition Co., Inc.			(10)			Process, Physical Distribution and Logistics Consulting Services
									Secured Debt						7/23/2019						5.09		%	L +			5.00%						4/8/2025			7,595			7,525			7,595
Fuse, LLC			(11)			Cable Networks Operator
									Secured Debt						6/30/2019						12.00		%										6/28/2024			1,810			1,810			1,672
									Common Stock						6/30/2019			10,429																					256			—
																																							2,066			1,672
GeoStabilization International (GSI)			(11)			Geohazard Engineering Services & Maintenance
									Secured Debt						1/2/2019						5.35		%	L +			5.25%						12/19/2025			20,710			20,615			20,606
GoWireless Holdings, Inc.			(11)			Provider of Wireless Telecommunications Carrier Services
									Secured Debt			(9)			1/10/2018						7.50		%	L +			6.50%						12/22/2024			18,534			18,440			18,576
Grupo Hima San Pablo, Inc.			(11)			Tertiary Care Hospitals
									Secured Debt			(9) (14) (17)			3/7/2013						9.25		%	L +			7.00%						4/30/2019			4,504			4,504			1,269
									Secured Debt			(14) (17)			3/7/2013						13.75		%										10/15/2018			2,055			2,040			49
									Secured Debt			(17)			3/7/2013						12.00		%										12/24/2021			147			147			147
																																							6,691			1,465
GS HVAM Intermediate, LLC			(10)			Specialized Food Distributor
									Secured Debt			(9)			10/18/2019						6.75		%	L +			5.75%						10/2/2024			13,243			13,167			13,243
GS Operating, LLC			(10)			Distributor of Industrial and Specialty Parts
									Secured Debt			(9)			2/24/2020						8.00		%	L +			6.50%						2/24/2025			28,451			28,068			28,451
HDC/HW Intermediate Holdings			(10)			Managed Services and Hosting Provider
									Secured Debt			(9)			12/21/2018						8.50		%	L +			7.50%						12/21/2023			3,449			3,419			3,059
Heartland Dental, LLC			(10)			Dental Support Organization
									Secured Debt			(9)			9/9/2020						7.50		%	L +			6.50%						4/30/2025			14,813			14,477			14,887

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
HOWLCO LLC			(11) (13) (21)			Provider of Accounting and Business Development Software to Real Estate End Markets
									Secured Debt			(9)			8/19/2021						7.00		%	L +			6.00%						10/23/2026			25,546			25,546			25,546
Hybrid Promotions, LLC			(10)			Wholesaler of Licensed, Branded and Private Label Apparel
									Secured Debt			(9)			6/30/2021						9.25		%	L +			8.25%						6/30/2026			7,088			6,957			7,028
IG Parent Corporation			(11)			Software Engineering
									Secured Debt			(9)			7/30/2021						6.75		%	L +			5.75%						7/30/2026			9,591			9,419			9,419
Implus Footcare, LLC			(10)			Provider of Footwear and Related Accessories
									Secured Debt			(9)			6/1/2017						8.75		%	L +			7.75%						4/30/2024			18,702			18,471			17,743
Independent Pet Partners Intermediate Holdings, LLC			(10)			Omnichannel Retailer of Specialty Pet Products
									Secured Debt			(29)			8/20/2020						7.20		%										12/22/2022			6,563			6,563			6,563
									Secured Debt						12/10/2020						6.00		%							6.00		%	11/20/2023			17,891			16,861			16,861
									Preferred Stock (non-voting)						12/10/2020						6.00		%							6.00		%							3,235			4,329
									Preferred Stock (non-voting)						12/10/2020																								—			—
									Member Units						11/20/2018			1,558,333																					1,558			—
																																							28,217			27,753
Industrial Services Acquisition, LLC			(10)			Industrial Cleaning Services
									Secured Debt			(9)			8/13/2021						7.75		%	L +			6.75%						8/13/2026			19,897			19,490			19,490
									Preferred Member Units			(8) (30)			1/31/2018			144			10.00		%							10.00		%							120			164
									Preferred Member Units			(8) (30)			5/17/2019			80			20.00		%							20.00		%							81			99
									Member Units			(30)			6/17/2016			900																					900			730
																																							20,591			20,483
Infolinks Media Buyco, LLC			(10)			Exclusive Placement Provider to the Advertising Ecosystem
									Secured Debt			(9)			11/1/2021						7.00		%	L +			6.00%						11/1/2026			8,680			8,487			8,487
Interface Security Systems, L.L.C			(10)			Commercial Security & Alarm Services
									Secured Debt			(9)			12/9/2021						11.75		%	L +			10.00%						8/7/2023			525			525			525
									Secured Debt			(9) (14)			8/7/2019						9.75		%	L +			7.00%			1.00		%	8/7/2023			7,313			7,237			5,233
																																							7,762			5,758
Intermedia Holdings, Inc.			(11)			Unified Communications as a Service
									Secured Debt			(9)			8/3/2018						7.00		%	L +			6.00%						7/19/2025			20,627			20,559			20,527

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Invincible Boat Company, LLC.			(10)			Manufacturer of Sport Fishing Boats
									Secured Debt			(9)			8/28/2019						8.00		%	L +			6.50%						8/28/2025			17,510			17,354			17,510
INW Manufacturing, LLC			(11)			Manufacturer of Nutrition and Wellness Products
									Secured Debt			(9)			5/19/2021						6.50		%	L +			5.75%						3/25/2027			7,406			7,205			7,258
Isagenix International, LLC			(11)			Direct Marketer of Health & Wellness Products
									Secured Debt			(9)			6/21/2018						6.75		%	L +			5.75%						6/14/2025			5,158			5,135			3,865
Jackmont Hospitality, Inc.			(10)			Franchisee of Casual Dining Restaurants
									Secured Debt			(9)			5/26/2015						8.00		%	L +			7.00%						11/4/2024			2,100			2,100			2,100
									Preferred Equity						11/8/2021			2,826,667																					314			314
																																							2,414			2,414
Joerns Healthcare, LLC			(11)			Manufacturer and Distributor of Health Care Equipment & Supplies
									Secured Debt			(9)			8/21/2019						7.00		%	L +			6.00%						8/21/2024			4,034			3,989			3,658
									Secured Debt						11/15/2021						15.00		%							15.00		%	11/8/2022			1,000			1,004			1,004
									Common Stock						8/21/2019			472,579																					4,429			—
																																							9,422			4,662
JTI Electrical & Mechanical, LLC			(10)			Electrical, Mechanical and Automation Services
									Secured Debt			(9)			12/22/2021						7.00		%	L +			6.00%						12/22/2026			37,895			36,972			36,972
									Common Equity						12/22/2021			1,684,211																					1,684			1,684
																																							38,656			38,656
Klein Hersh, LLC			(10)			Executive and C-Suite Placement for the Life Sciences and Healthcare Industries
									Secured Debt			(9)			11/13/2020						7.75		%	L +			7.00%						11/13/2025			43,321			42,342			43,278
KMS, LLC			(10)			Wholesaler of Closeout and Value-priced Products
									Secured Debt			(9)			10/4/2021						8.25		%	L +			7.25%						10/4/2026			7,581			7,415			7,415
Kore Wireless Group Inc.			(11) (13)			Mission Critical Software Platform
									Secured Debt						12/31/2018						5.72		%	L +			5.50%						12/20/2024			11,415			11,345			11,400
Laredo Energy, LLC			(10)			Oil & Gas Exploration & Production
									Member Units						5/4/2020			1,155,952																					11,560			9,659

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
LaserAway Intermediate Holdings II, LLC			(11)			Aesthetic Dermatology Service Provider
									Secured Debt			(9)			10/18/2021						6.50		%	L +			5.75%						10/14/2027			4,130			4,050			4,115
Lightbox Holdings, L.P.			(11)			Provider of Commercial Real Estate Software
									Secured Debt						5/23/2019						5.22		%	L +			5.00%						5/9/2026			14,625			14,460			14,442
LKCM Headwater Investments I, L.P.			(12) (13)			Investment Partnership
									LP Interests			(8) (31)			1/25/2013			2.3		%																			1,746			2,541
LL Management, Inc.			(10)			Medical Transportation Service Provider
									Secured Debt			(9)			5/2/2019						8.25		%	L +			7.25%						9/25/2023			17,438			17,309			17,438
LLFlex, LLC			(10)			Provider of Metal-Based Laminates
									Secured Debt			(9)			8/16/2021						10.00		%	L +			9.00%						8/16/2026			4,478			4,382			4,382
Logix Acquisition Company, LLC			(10)			Competitive Local Exchange Carrier
									Secured Debt			(9)			1/8/2018						6.75		%	L +			5.75%						12/22/2024			25,850			24,605			24,428
Looking Glass Investments, LLC			(12) (13)			Specialty Consumer Finance
									Member Units						7/1/2015			3																					125			25
Mac Lean-Fogg Company			(10)			Manufacturer and Supplier for Auto and Power Markets
									Secured Debt			(9)			4/22/2019						5.88		%	L +			5.25%						12/22/2025			17,080			16,995			17,080
									Preferred Stock						10/1/2019						13.75		%							9.25		%							1,920			1,920
																																							18,915			19,000
Mako Steel, LP			(10)			Self-Storage Design & Construction
									Secured Debt			(9)			3/15/2021						8.00		%	L +			7.25%						3/13/2026			17,589			17,267			17,589
MB2 Dental Solutions, LLC			(11)			Dental Partnership Organization
									Secured Debt			(9)			1/28/2021						7.00		%	L +			6.00%						1/29/2027			11,682			11,531			11,682
Mills Fleet Farm Group, LLC			(10)			Omnichannel Retailer of Work, Farm and Lifestyle Merchandise
									Secured Debt			(9)			10/24/2018						7.25		%	L +			6.25%						10/24/2024			17,781			17,563			17,781

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
NBG Acquisition Inc			(11)			Wholesaler of Home Décor Products
									Secured Debt			(9)			4/28/2017						6.50		%	L +			5.50%						4/26/2024			3,987			3,961			2,758
NinjaTrader, LLC			(10)			Operator of Futures Trading Platform
									Secured Debt			(9)			12/18/2019						7.25		%	L +			6.25%						12/18/2024			31,425			30,837			31,368
NNE Partners, LLC			(10)			Oil & Gas Exploration & Production
									Secured Debt						3/2/2017						9.37		%	L +			4.75%			4.50		%	12/31/2023			24,781			24,709			23,154
Northstar Group Services, Inc			(11)			Commercial & Industrial Services
									Secured Debt			(9)			11/1/2021						6.50		%	L +			5.50%						11/12/2026			10,000			9,952			10,034
NTM Acquisition Corp.			(11)			Provider of B2B Travel Information Content
									Secured Debt			(9)			7/12/2016						8.25		%	L +			6.25%			1.00		%	6/7/2024			4,598			4,598			4,552
NWN Corporation			(10)			Value Added Reseller and Provider of Managed Services to a Diverse Set of Industries
									Secured Debt			(9)			5/7/2021						7.50		%	L +			6.50%						5/7/2026			42,972			42,108			42,323
Ospemifene Royalty Sub LLC			(10)			Estrogen-Deficiency Drug Manufacturer and Distributor
									Secured Debt			(14)			7/8/2013						11.50		%										11/15/2026			4,562			4,562			112
OVG Business Services, LLC			(10)			Venue Management Services
									Secured Debt			(9)			11/29/2021						7.25		%	L +			6.25%						11/19/2028			14,000			13,861			13,861
Project Eagle Holdings, LLC			(10)			Provider of Secure Business Collaboration Software
									Secured Debt			(9)			7/6/2020						7.75		%	L +			6.75%						7/6/2026			29,738			29,151			29,714
PT Network, LLC			(10)			Provider of Outpatient Physical Therapy and Sports Medicine Services
									Secured Debt			(9)			10/12/2017						8.50		%	L +			5.50%			2.00		%	11/30/2023			8,889			8,889			8,889
									Common Stock						1/1/2020			2																					—			80
																																							8,889			8,969
RA Outdoors LLC			(10)			Software Solutions Provider for Outdoor Activity Management
									Secured Debt			(9)			4/8/2021						7.75		%	L +			6.75%						4/8/2026			19,374			19,193			18,352

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
Research Now Group, Inc. and Survey Sampling International, LLC			(11)			Provider of Outsourced Online Surveying
									Secured Debt			(9)			12/29/2017						6.50		%	L +			5.50%						12/20/2024			20,124			19,789			19,899
RM Bidder, LLC			(10)			Scripted and Unscripted TV and Digital Programming Provider
									Member Units						11/12/2015			2,779																					46			26
									Warrants			(26)			11/12/2015			187,161															10/20/2025						425			—
																																							471			26
Roof Opco, LLC			(10)			Residential Re-Roofing/Repair
									Secured Debt			(9)			8/27/2021						7.00		%	L +			6.00%						8/27/2026			2,800			2,704			2,704
RTIC Subsidiary Holdings, LLC			(10)			Direct-To-Consumer eCommerce Provider of Outdoor Products
									Secured Debt			(9)			9/1/2020						9.00		%	L +			7.75%						9/1/2025			18,191			17,997			18,191
Rug Doctor, LLC.			(10)			Carpet Cleaning Products and Machinery
									Secured Debt			(9)			7/16/2021						7.25		%	L +			6.25%						11/16/2024			11,145			10,902			10,902
Salient Partners L.P.			(11)			Provider of Asset Management Services
									Secured Debt			(9)			8/31/2018						7.00		%	L +			6.00%						10/30/2022			6,251			6,247			4,063
									Secured Debt			(9)			9/30/2021						6.00		%	L +			5.00%						10/30/2022			1,250			1,250			2,435
																																							7,497			6,498
Savers, Inc.			(11)			For-Profit Thrift Retailer
									Secured Debt			(9)			5/14/2021						6.25		%	L +			5.50%						4/26/2028			11,400			11,295			11,386
SIB Holdings, LLC			(10)			Provider of Cost Reduction Services
									Secured Debt			(9)			10/29/2021						7.00		%	L +			6.00%						10/29/2026			6,282			6,134			6,145
									Common Equity						10/29/2021			95,238																					200			200
																																							6,334			6,345
South Coast Terminals Holdings, LLC			(10)			Specialty Toll Chemical Manufacturer
									Secured Debt			(9)			12/10/2021						7.25		%	L +			6.25%						12/13/2026			50,704			49,589			49,589
									Common Equity						12/10/2021			863,636																					864			864
																																							50,453			50,453
Staples Canada ULC			(10) (13) (21)			Office Supplies Retailer
									Secured Debt			(9) (22)			9/14/2017						8.00		%	L +			7.00%						9/12/2024			16,116			16,039			15,620
Stellant Systems, Inc.			(11)			Manufacturer of Traveling Wave Tubes and Vacuum Electronic Devices

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Secured Debt			(9)			10/22/2021						6.25		%	L +			5.50%						10/1/2028			7,700			7,625			7,700
Student Resource Center, LLC			(10)			Higher Education Services
									Secured Debt			(9)			6/25/2021						9.00		%	L +			8.00%						6/25/2026			10,969			10,753			10,826
Tacala Investment Corp.			(34)			Quick Service Restaurant Group
									Secured Debt			(9)			3/19/2021						4.25		%	L +			3.50%						2/5/2027			1,995			1,995			1,994
Team Public Choices, LLC			(11)			Home-Based Care Employment Service Provider
									Secured Debt			(9)			12/22/2020						6.00		%	L +			5.00%						12/18/2027			15,109			14,778			15,071
Tectonic Financial, LLC						Financial Services Organization
									Common Stock			(8)			5/15/2017			200,000																					2,000			4,650
Tex Tech Tennis, LLC			(10)			Sporting Goods & Textiles
									Common Stock			(30)			7/7/2021			1,000,000																					1,000			1,000
U.S. TelePacific Corp.			(11)			Provider of Communications and Managed Services
									Secured Debt			(9)			5/17/2017						7.00		%	L +			6.00%						5/2/2023			17,088			16,985			12,917
USA DeBusk LLC			(10)			Provider of Industrial Cleaning Services
									Secured Debt			(9)			10/22/2019						6.75		%	L +			5.75%						9/8/2026			37,281			36,510			37,281
Veregy Consolidated, Inc.			(11)			Energy Service Company
									Secured Debt			(9)			11/9/2020						6.25		%	L +			5.25%						11/3/2025			5,875			5,111			5,111
									Secured Debt			(9)			11/9/2020						7.00		%	L +			6.00%						11/3/2027			14,888			14,524			14,925
																																							19,635			20,036
Vida Capital, Inc			(11)			Alternative Asset Manager
									Secured Debt						10/10/2019						6.10		%	L +			6.00%						10/1/2026			17,089			16,905			15,850
Vistar Media, Inc.			(10)			Operator of Digital Out-of-Home Advertising Platform
									Preferred Stock						4/3/2019			70,207																					767			1,726
VORTEQ Coil Finishers, LLC			(10)			Specialty Coating of Aluminum and Light-Gauge Steel

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

Portfolio Company (1) (20)						Business Description			Type of Investment (2) (3) (15)						Investment Date (24)			Shares/Units			Total Rate			Reference Rate and Spread (25)						PIK Rate (19)			Maturity Date			Principal (4)			Cost (4)			Fair Value (18)
									Secured Debt			(9)			11/30/2021						8.50		%	L +			7.50%						11/30/2026			25,962			25,450			25,450
									Common Equity						11/30/2021			1,038,462																					1,038			1,038
																																							26,488			26,488
Wahoo Fitness Acquisition L.L.C.			(11)			Fitness Training Equipment Provider
									Secured Debt			(9)			8/17/2021						6.75		%	L +			5.75%						8/12/2028			15,000			14,569			14,916
Wall Street Prep, Inc.			(10)			Financial Training Services
									Secured Debt			(9)			7/19/2021						8.00		%	L +			7.00%						7/19/2026			4,373			4,288			4,285
									Common Stock						7/19/2021			400,000																					400			400
																																							4,688			4,685
Watterson Brands, LLC			(10)			Facility Management Services
									Secured Debt			(9)			12/17/2021						7.25		%	L +			6.25%						12/17/2026			25,876			25,267			25,267
Winter Services LLC			(10)			Provider of Snow Removal and Ice Management Services
									Secured Debt			(9)			11/19/2021						8.00		%	L +			7.00%						11/19/2026			10,278			10,018			10,061
Xenon Arc, Inc.			(10)			Tech-enabled Distribution Services to Chemicals and Food Ingredients Primary Producers
									Secured Debt			(9)			12/17/2021						6.75		%	L +			6.00%						12/17/2026			38,600			37,423			37,423
YS Garments, LLC			(11)			Designer and Provider of Branded Activewear
									Secured Debt			(9)			8/22/2018						6.50		%	L +			5.50%						8/9/2024			13,034			12,967			12,578
Subtotal Non-Control/Non-Affiliate Investments (85.2% of net assets at fair value)																																							$	1,573,110		$	1,523,360
Total Portfolio Investments, December 31, 2021 (199.2% of net assets at fair value)																																							$	3,259,246		$	3,561,831

____________________

(1)All investments are Lower Middle Market portfolio investments, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Lower Middle Market portfolio investments. All of the Company’s investments, unless otherwise noted, are encumbered either as security for the Company’s Credit Facility or in support of the SBA-guaranteed debentures issued by the Funds.

(2)Debt investments are income producing, unless otherwise noted by footnote (14), as described below. Equity and warrants are non-income producing, unless otherwise noted by footnote (8), as described below.

(3)See Note C—Fair Value Hierarchy for Investments—Portfolio Composition and Schedule 12-14 for a summary of geographic location of portfolio companies.

(4)Principal is net of repayments. Cost is net of repayments and accumulated unearned income.

(5)Control investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained.

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

(6)Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments.

(7)Non-Control/Non-Affiliate investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.

(8)Income producing through dividends or distributions.

(9)Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 67% of the loans (based on the par amount) contain LIBOR floors which range between 0.50% and 2.00%, with a weighted-average LIBOR floor of 1.06%.

(10)Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments.

(11)Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments.

(12)Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments.

(13)Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.

(14)Non-accrual and non-income producing investment.

(15)All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities.”

(16)External Investment Manager. Investment is not encumbered as security for the Company's Credit Facility or in support of the SBA-guaranteed debentures issued by the Funds.

(17)Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.

(18)Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion.

(19)Investments may have a portion, or all, of their income received from Paid-in-Kind ("PIK") interest or dividends. PIK interest income and cumulative dividend income represent income not paid currently in cash. The difference between the Total Rate and PIK Rate represents the cash rate as of December 31, 2021.

(20)All portfolio company headquarters are based in the United States, unless otherwise noted.

(21)Portfolio company headquarters are located outside of the United States.

(22)In connection with the Company's debt investment in Staples Canada ULC and in an attempt to mitigate any potential adverse change in foreign exchange rates during the term of the Company's investment, the Company maintains a forward foreign currency contract with Cadence Bank to lend $21.4 million Canadian Dollars and receive $16.9 million U.S. Dollars with a settlement date of September 14, 2022. The unrealized depreciation on the forward foreign currency contract was not significant as of December 31, 2021.

(23)The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of LIBOR plus 7.25% (Floor 1.25%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.

(24)Investment date represents the date of initial investment in the security position.

(25)A majority of the variable rate loans in the Company’s investment portfolio bear interest at a rate that may be determined by reference to either LIBOR (“L”) or an alternate Base Rate (commonly based on the Federal Funds Rate or the Prime Rate(“P”)), which typically resets every one, three, or six months at the borrower’s option.

(26)Warrants are presented in equivalent units with a strike price of $14.28 per unit.

(27)Warrants are presented in equivalent shares/units with a strike price of $0.01 per share/unit.

(28)Warrants are presented in equivalent units with a strike price of $1.50 per unit.

(29)As of December 31, 2021, borrowings under the loan facility bore interest at LIBOR+6.00% or Prime+5.00%. Delayed draw term loan facility permits the borrower to make an interest rate election on each new tranche of borrowings under the facility. The rate presented represents a weighted-average rate for borrowings under the facility.

(30)Shares/Units represent ownership in a related Real Estate or HoldCo entity.

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2021

(dollars in thousands)

(31)Investment is not unitized. Presentation is made in percent of fully diluted ownership unless otherwise indicated.

(32)The security has an effective contractual interest rate of 2.00% PIK + LIBOR+6.50%, Floor 1.00%, but the issuer may, in its discretion, elect to pay the PIK interest in cash. The rate presented represents the effective current yield based on actual payments received during the period.

(33)The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of LIBOR plus 7.96% (Floor 1.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.

(34)Short-term portfolio investments. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of short-term portfolio investments.

(35)Index based floating interest rate is subject to contractual maximum index rate of 1.50% as of December 31, 2021.

(36)Portfolio company is in a bankruptcy process and, as such, the maturity date of our debt investment in this portfolio company will not be finally determined until such process is complete. As noted in footnote (14), our debt investment in this portfolio company is on non-accrual status.

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MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements

(Unaudited)

NOTE A—ORGANIZATION AND BASIS OF PRESENTATION

1.Organization

Main Street Capital Corporation (“MSCC”) is a principal investment firm primarily focused on providing customized debt and equity financing to lower middle market (“LMM”) companies and debt capital to middle market (“Middle Market”) companies. The portfolio investments of MSCC and its consolidated subsidiaries are typically made to support management buyouts, recapitalizations, growth financings, refinancings and acquisitions of companies that operate in a variety of industry sectors. MSCC seeks to partner with entrepreneurs, business owners and management teams and generally provides “one-stop” financing alternatives within its LMM investment strategy. MSCC and its consolidated subsidiaries invest primarily in secured debt investments, equity investments, warrants and other securities of LMM companies based in the United States and in secured debt investments of Middle Market companies generally headquartered in the United States.

MSCC was formed in March 2007 to operate as an internally managed business development company (“BDC”) under the Investment Company Act of 1940, as amended (the “1940 Act”). Because MSCC is internally managed, all of the executive officers and other employees are employed by MSCC. Therefore, MSCC does not pay any external investment advisory fees, but instead directly incurs the operating costs associated with employing investment and portfolio management professionals.

MSCC wholly owns several investment funds, including Main Street Mezzanine Fund, LP (“MSMF”) and Main Street Capital III, LP (“MSC III” and, together with MSMF, the “Funds”), and each of their general partners. The Funds are each licensed as a Small Business Investment Company (“SBIC”) by the United States Small Business Administration (“SBA”).

MSC Adviser I, LLC (the “External Investment Manager”) was formed in November 2013 as a wholly-owned subsidiary of MSCC to provide investment management and other services to parties other than MSCC and its subsidiaries or their portfolio companies (“External Parties”) and receives fee income for such services. MSCC has been granted no-action relief by the Securities and Exchange Commission (“SEC”) to allow the External Investment Manager to register as a registered investment adviser under the Investment Advisers Act of 1940, as amended. Since the External Investment Manager conducts all of its investment management activities for External Parties, it is accounted for as a portfolio investment of MSCC and is not included as a consolidated subsidiary of MSCC in MSCC’s consolidated financial statements.

MSCC has elected to be treated for U.S. federal income tax purposes as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”). As a result, MSCC generally does not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that it distributes to its stockholders.

MSCC has certain direct and indirect wholly-owned subsidiaries that have elected to be taxable entities (the “Taxable Subsidiaries”). The primary purpose of the Taxable Subsidiaries is to permit MSCC to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes.

Unless otherwise noted or the context otherwise indicates, the terms “we,” “us,” “our,” the “Company” and “Main Street” refer to MSCC and its consolidated subsidiaries, which include the Funds and the Taxable Subsidiaries.

2.Basis of Presentation

Main Street’s consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). The Company is an investment company following accounting and reporting guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 946, Financial Services—Investment Companies (“ASC 946”). For each of the periods presented herein, Main Street’s consolidated financial statements include the accounts of MSCC and its consolidated subsidiaries. The Investment Portfolio, as used herein, refers to all of Main Street’s investments in LMM portfolio companies,

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MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

investments in Private Loan portfolio companies, investments in Middle Market portfolio companies, Other Portfolio investments and the investment in the External Investment Manager (see Note C—Fair Value Hierarchy for Investments—Portfolio Composition—Investment Portfolio Composition for additional discussion of Main Street’s Investment Portfolio and definitions for the defined terms Private Loan and Other Portfolio). Main Street’s results of operations for the three and nine months ended September 30, 2022 and 2021, cash flows for the nine months ended September 30, 2022 and 2021, and financial position as of September 30, 2022 and December 31, 2021, are presented on a consolidated basis. The effects of all intercompany transactions between MSCC and its consolidated subsidiaries have been eliminated in consolidation.

The accompanying unaudited consolidated financial statements of Main Street are presented in conformity with U.S. GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Articles 6, 10 and 12 of Regulation S-X. Accordingly, certain disclosures accompanying annual financial statements prepared in accordance with U.S. GAAP are omitted. The unaudited financial statements and notes should be read in conjunction with the audited financial statements and notes thereto for the year ended December 31, 2021. In the opinion of management, the unaudited consolidated financial results included herein contain all adjustments, consisting solely of normal recurring accruals, considered necessary for the fair presentation of financial statements for the interim periods included herein. The results of operations for the three and nine months ended September 30, 2022 are not necessarily indicative of the operating results to be expected for the full year. Financial statements prepared on a U.S. GAAP basis require management to make estimates and assumptions that affect the amounts and disclosures reported in the financial statements and accompanying notes. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed herein.

Principles of Consolidation

Under ASC 946, Main Street is precluded from consolidating other entities in which Main Street has equity investments, including those in which it has a controlling interest, unless the other entity is another investment company. An exception to this general principle in ASC 946 occurs if Main Street holds a controlling interest in an operating company that provides all or substantially all of its services directly to Main Street or to its portfolio companies. Accordingly, as noted above, MSCC’s consolidated financial statements include the financial position and operating results for the Funds and the Taxable Subsidiaries. Main Street has determined that none of its portfolio investments qualify for this exception, including the investment in the External Investment Manager. Therefore, Main Street’s Investment Portfolio is carried on the Consolidated Balance Sheets at fair value, as discussed further in Note B.1.—Summary of Significant Accounting Policies—Valuation of the Investment Portfolio, with any adjustments to fair value recognized as “Net Unrealized Appreciation (Depreciation)” until the investment is realized, usually upon exit, resulting in any gain or loss being recognized as a “Net Realized Gain (Loss)”, in both cases on the Consolidated Statements of Operations.

Portfolio Investment Classification

Main Street classifies its Investment Portfolio in accordance with the requirements of the 1940 Act. Under the 1940 Act, (a) “Control Investments” are defined as investments in which Main Street owns more than 25% of the voting securities or has rights to maintain greater than 50% of the board representation, (b) “Affiliate Investments” are defined as investments in which Main Street owns between 5% and 25% (inclusive) of the voting securities and does not have rights to maintain greater than 50% of the board representation and (c) “Non-Control/Non-Affiliate Investments” are defined as investments that are neither Control Investments nor Affiliate Investments. For purposes of determining the classification of its Investment Portfolio, Main Street has excluded consideration of any voting securities or board appointment rights held by third-party investment funds advised by the External Investment Manager.

NOTE B—SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

1.Valuation of the Investment Portfolio

Main Street accounts for its Investment Portfolio at fair value. As a result, Main Street follows the provisions of ASC 820, Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value and enhances disclosure requirements for fair value measurements. ASC 820 requires Main Street to assume that the portfolio investment is to be sold in the principal market to independent market participants, which may be a hypothetical market. Market participants are defined as buyers and sellers in the principal market that are independent, knowledgeable and willing and able to transact.

Main Street’s portfolio strategy calls for it to invest primarily in illiquid debt and equity securities issued by privately held, LMM companies and debt securities issued by Middle Market companies that are generally larger in size than the LMM companies and that can be more liquid than the debt securities issued by LMM companies. Main Street categorizes some of its investments in LMM companies and Middle Market companies as Private Loan portfolio investments, which are primarily debt securities in privately held companies that have been originated directly by Main Street or through strategic relationships with other investment funds on a collaborative basis, and are often referred to in the debt markets as “club deals.” Private Loan investments are made in companies that are consistent with the size of companies Main Street invests in through its LMM portfolio and Middle Market portfolio. Main Street’s portfolio also includes Other Portfolio investments which primarily consist of investments that are not consistent with the typical profiles for its LMM portfolio investments, Private Loan portfolio investments or Middle Market portfolio investments, including investments which may be managed by third parties. Main Street’s portfolio may also include short-term portfolio investments that are atypical of Main Street’s LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital and are more liquid than investments within the other portfolios. Main Street’s portfolio investments may be subject to restrictions on resale.

LMM investments and Other Portfolio investments generally have no established trading market, while Private Loan investments may include investments which have no established market or have established markets that are not active. Middle Market and short-term portfolio investments generally have established markets that are not active. Main Street determines in good faith the fair value of its Investment Portfolio pursuant to a valuation policy in accordance with ASC 820, with such valuation process approved by its Board of Directors and in accordance with the 1940 Act. Main Street’s valuation policies and processes are intended to provide a consistent basis for determining the fair value of Main Street’s Investment Portfolio.

For LMM portfolio investments, Main Street generally reviews external events, including private mergers, sales and acquisitions involving comparable companies, and includes these events in the valuation process by using an enterprise value waterfall methodology (“Waterfall”) for its LMM equity investments and an income approach using a yield-to-maturity model (“Yield-to-Maturity”) valuation method for its LMM debt investments. For Private Loan and Middle Market portfolio investments in debt securities for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value the investment in a current hypothetical sale using the Yield-to-Maturity valuation method. For Middle Market and short-term portfolio investments in debt securities for which it has determined that thirds-party quotes or other independent prices are available, Main Street primarily uses quoted prices in the valuation process. Main Street determines the appropriateness of the use of third-party broker quotes, if any, in determining fair value based on its understanding of the level of actual transactions used by the broker to develop the quote and whether the quote was an indicative price or binding offer, the depth and consistency of broker quotes and the correlation of changes in broker quotes with underlying performance of the portfolio company and other market indices. For its Other Portfolio equity investments, Main Street generally calculates the fair value of the investment primarily based on the net asset value (“NAV”) of the fund and adjusts the fair value for other factors deemed relevant that would affect the fair value of the investment. All of the valuation approaches for Main Street’s portfolio investments estimate the value of the investment as if Main Street were to sell, or exit, the investment as of the measurement date.

These valuation approaches consider the value associated with Main Street’s ability to control the capital structure of the portfolio company, as well as the timing of a potential exit. For valuation purposes, “control” portfolio investments are composed of debt and equity securities in companies for which Main Street has a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors. For valuation purposes, “non-control” portfolio investments are generally composed of debt and equity

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

securities in companies for which Main Street does not have a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors.

Under the Waterfall valuation method, Main Street estimates the enterprise value of a portfolio company using a combination of market and income approaches or other appropriate valuation methods, such as considering recent transactions in the equity securities of the portfolio company or third-party valuations of the portfolio company, and then performs a Waterfall calculation by allocating the enterprise value over the portfolio company’s securities in order of their preference relative to one another. The enterprise value is the fair value at which an enterprise could be sold in a transaction between two willing parties, other than through a forced or liquidation sale. Typically, privately held companies are bought and sold based on multiples of earnings before interest, taxes, depreciation and amortization (“EBITDA”), cash flows, net income, revenues, or in limited cases, book value. There is no single methodology for estimating enterprise value. For any one portfolio company, enterprise value is generally described as a range of values from which a single estimate of enterprise value is derived. In estimating the enterprise value of a portfolio company, Main Street analyzes various factors including the portfolio company’s historical and projected financial results. Due to SEC deadlines for Main Street’s quarterly and annual financial reporting, the operating results of a portfolio company used in the current period valuation are generally the results from the period ended three months prior to such valuation date and may include unaudited, projected, budgeted or pro forma financial information and may require adjustments for non-recurring items or to normalize the operating results that may require significant judgment in determining. In addition, projecting future financial results requires significant judgment regarding future growth assumptions. In evaluating the operating results, Main Street also analyzes the impact of exposure to litigation, loss of customers or other contingencies. After determining the appropriate enterprise value, Main Street allocates the enterprise value to investments in order of the legal priority of the various components of the portfolio company’s capital structure. In applying the Waterfall valuation method, Main Street assumes the loans are paid-off at the principal amount in a change in control transaction and are not assumed by the buyer, which Main Street believes is consistent with its past transaction history and standard industry practices.

Under the Yield-to-Maturity valuation method, Main Street also uses the income approach to determine the fair value of debt securities based on projections of the discounted future free cash flows that the debt security will likely generate, including analyzing the discounted cash flows of interest and principal amounts for the debt security, as set forth in the associated loan agreements, as well as the financial position and credit risk of the portfolio company. Main Street’s estimate of the expected repayment date of its debt securities is generally the maturity date of the instrument, as Main Street generally intends to hold its loans and debt securities to maturity. The Yield-to-Maturity analysis also considers changes in leverage levels, credit quality, portfolio company performance, changes in market-based interest rates and other factors. Main Street will generally use the value determined by the Yield-to-Maturity analysis as the fair value for that security; however, because of Main Street’s general intent to hold its loans to maturity, the fair value will not exceed the principal amount of the debt security valued using the Yield-to-Maturity valuation method. A change in the assumptions that Main Street uses to estimate the fair value of its debt securities using the Yield-to-Maturity valuation method could have a material impact on the determination of fair value. If there is deterioration in credit quality or if a debt security is in workout status, Main Street may consider other factors in determining the fair value of the debt security, including the value attributable to the debt security from the enterprise value of the portfolio company or the proceeds that would most likely be received in a liquidation analysis.

Under the NAV valuation method, for an investment in an investment fund that does not have a readily determinable fair value, Main Street measures the fair value of the investment predominately based on the NAV of the investment fund as of the measurement date and adjusts the investment’s fair value for factors known to Main Street that would affect that fund’s NAV, including, but not limited to, fair values for individual investments held by the fund if Main Street holds the same investment or for a publicly traded investment. In addition, in determining the fair value of the investment, Main Street considers whether adjustments to the NAV are necessary in certain circumstances, based on the analysis of any restrictions on redemption of Main Street’s investment as of the measurement date, recent actual sales or redemptions of interests in the investment fund, and expected future cash flows available to equity holders, including the rate of return on those cash flows compared to an implied market return on equity required by market participants, or other uncertainties surrounding Main Street’s ability to realize the full NAV of its interests in the investment fund.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Pursuant to its internal valuation process and the requirements under the 1940 Act, Main Street performs valuation procedures on each of its portfolio investments quarterly. In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its LMM portfolio companies, Main Street, among other things, consults with a nationally recognized independent financial advisory services firm. The nationally recognized independent financial advisory services firm analyzes and provides observations, recommendations and an assurance certification regarding the Company’s determinations of the fair value of its LMM portfolio company investments. The nationally recognized independent financial advisory services firm is generally consulted relative to Main Street’s investments in each LMM portfolio company at least once every calendar year, and for Main Street’s investments in new LMM portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the nationally recognized independent financial advisory services firm on its investments in one or more LMM portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a LMM portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from its independent financial advisory services firm in arriving at Main Street’s determination of fair value on its investments in a total of 51 LMM portfolio companies for the nine months ended September 30, 2022, representing 80% of the total LMM portfolio at fair value as of September 30, 2022, and on a total of 43 LMM portfolio companies for the nine months ended September 30, 2021, representing 70% of the total LMM portfolio at fair value as of September 30, 2021. Excluding its investments in LMM portfolio companies that, as of September 30, 2022 and 2021, as applicable, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment or whose primary purpose is to own real estate for which a third-party appraisal is obtained on at least an annual basis, the percentage of the LMM portfolio reviewed and certified by Main Street’s independent financial advisory services firm for the nine months ended September 30, 2022 and 2021 was 80% and 74% of the total LMM portfolio at fair value as of September 30, 2022 and 2021, respectively.

For valuation purposes, all of Main Street’s Private Loan portfolio investments are non-control investments. For Private Loan portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Private Loan debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Private Loan equity investments in a current hypothetical sale using the Waterfall valuation method.

In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its Private Loan portfolio companies, Main Street, among other things, consults with a nationally recognized independent financial advisory services firm. The nationally recognized independent financial advisory services firm analyzes and provides observations and recommendations and an assurance certification regarding the Company’s determinations of the fair value of its Private Loan portfolio company investments. The nationally recognized independent financial advisory services firm is generally consulted relative to Main Street’s investments in each Private Loan portfolio company at least once every calendar year, and for Main Street’s investments in new Private Loan portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the nationally recognized independent financial advisory services firm on its investments in one or more Private Loan portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a Private Loan portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from its independent financial advisory services firm in arriving at its determination of fair value on its investments in a total of 40 Private Loan portfolio companies for the nine months ended September 30, 2022, representing 50% of the total Private Loan portfolio at fair value as of September 30, 2022, and on a total of 31 Private Loan portfolio companies for the nine months ended September 30, 2021, representing 57% of the total Private Loan portfolio at fair value as of September 30, 2021. Excluding its investments in Private Loan portfolio companies that, as of September 30, 2022 and 2021, as applicable, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment and its investments in Private Loan portfolio companies that were not reviewed because the investment is valued based upon third-party quotes or other independent pricing, the percentage of the Private Loan portfolio reviewed and certified by Main Street’s independent financial advisory services firm for the nine months ended September 30, 2022 and 2021 was 70% and 75% of the total Private Loan portfolio at fair value as of September 30, 2022 and 2021, respectively.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

For valuation purposes, all of Main Street’s Middle Market portfolio investments are non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. For Middle Market portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Middle Market debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Middle Market equity investments in a current hypothetical sale using the Waterfall valuation method. The Company generally consults on a limited basis with a financial advisory services firm in connection with determining the fair value of its Middle Market portfolio investments due to the nature of these investments. The vast majority (95% and 93% as of September 30, 2022 and December 31, 2021, respectively) of the Middle Market portfolio investments (i) are valued using third-party quotes or other independent pricing services, (ii) Main Street has consulted with and received an assurance certification from independent financial services firm within the last twelve months or (iii) are new investments that have not been in the Investment Portfolio for at least twelve months subsequent to the initial investment.

For valuation purposes, all of Main Street’s short-term portfolio investments are non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. Because all of the short-term portfolio investments are typically valued using third-party quotes or other independent pricing services, Main Street generally does not consult with any financial advisory services firms in connection with determining the fair value of its short-term portfolio investments.

For valuation purposes, all of Main Street’s Other Portfolio investments are non-control investments. Main Street’s Other Portfolio investments comprised 2.9% and 4.7% of Main Street’s Investment Portfolio at fair value as of September 30, 2022 and December 31, 2021, respectively. Similar to the LMM investment portfolio, market quotations for Other Portfolio equity investments are generally not readily available. For its Other Portfolio equity investments, Main Street generally determines the fair value of these investments using the NAV valuation method.

For valuation purposes, Main Street’s investment in the External Investment Manager is a control investment. Market quotations are not readily available for this investment, and as a result, Main Street determines the fair value of the External Investment Manager using the Waterfall valuation method under the market approach. In estimating the enterprise value, Main Street analyzes various factors, including the entity’s historical and projected financial results, as well as its size, marketability and performance relative to the population of market comparables. This valuation approach estimates the value of the investment as if Main Street were to sell, or exit, the investment. In addition, Main Street considers its ability to control the capital structure of the company, as well as the timing of a potential exit, in connection with determining the fair value of the External Investment Manager.

Due to the inherent uncertainty in the valuation process, Main Street’s determination of fair value for its Investment Portfolio may differ materially from the values that would have been determined had a ready market for the securities existed. In addition, changes in the market environment, portfolio company performance and other events that may occur over the lives of the investments may cause the gains or losses ultimately realized on these investments to be materially different than the valuations currently assigned. Main Street determines the fair value of each individual investment and records changes in fair value as unrealized appreciation or depreciation.

Main Street uses an internally developed portfolio investment rating system in connection with its investment oversight, portfolio management and analysis and investment valuation procedures for its LMM, Private Loan and Middle Market portfolio companies. This system takes into account both quantitative and qualitative factors of each LMM, Private Loan and Middle Market portfolio company.

In December 2020, the SEC adopted Rule 2a-5 under the 1940 Act, which permits a BDC’s board of directors to designate its executive officers or investment adviser as a valuation designee to determine the fair value for its investment portfolio, subject to the active oversight of the board. Main Street’s Board of Directors has approved policies and procedures pursuant to Rule 2a-5 (the “Valuation Procedures”) and has designated a group of its executive officers to serve as the Board of Directors’ valuation designee. Main Street adopted the Valuation Procedures effective April 1,

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

2021. Main Street believes its Investment Portfolio as of September 30, 2022 and December 31, 2021 approximates fair value as of those dates based on the markets in which it operates and other conditions in existence on those reporting dates.

2.Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. Actual results may differ from these estimates under different conditions or assumptions. Additionally, as explained in Note B.1.—Summary of Significant Accounting Policies—Valuation of the Investment Portfolio, the consolidated financial statements include investments in the Investment Portfolio whose values have been estimated by Main Street, pursuant to valuation policies and procedures approved and overseen by Main Street’s Board of Directors, in the absence of readily ascertainable market values. Because of the inherent uncertainty of the Investment Portfolio valuations, those estimated values may differ materially from the values that would have been determined had a ready market for the securities existed.

Macroeconomic factors, including the COVID-19 pandemic, risk of recession, inflation, supply chain constraints or disruptions, geopolitical disruptions and rising interest rates, and the related effect on the U.S. and global economies, have impacted, and may continue to impact, the businesses and operating results of certain of Main Street’s portfolio companies, as well as market interest rate spreads. As a result of these and other current effects of macroeconomic factors, as well as the uncertainty regarding the extent and duration of their impact, the valuation of Main Street’s Investment Portfolio has and may continue to experience increased volatility.

3.Cash and Cash Equivalents

Cash and cash equivalents consist of cash and highly liquid investments with an original maturity of three months or less at the date of purchase. Cash and cash equivalents are carried at cost, which approximates fair value.

At September 30, 2022, cash balances totaling $58.2 million exceeded Federal Deposit Insurance Corporation insurance protection levels, subjecting the Company to risk related to the uninsured balance. All of the Company’s cash deposits are held at large established high credit quality financial institutions and management believes that the risk of loss associated with any uninsured balances is remote.

4.Interest, Dividend and Fee Income

Main Street records interest and dividend income on the accrual basis to the extent amounts are expected to be collected. Dividend income is recorded as dividends are declared by the portfolio company or at the point an obligation exists for the portfolio company to make a distribution. In accordance with Main Street’s valuation policies, Main Street evaluates accrued interest and dividend income periodically for collectability. When a loan or debt security becomes 90 days or more past due, and if Main Street otherwise does not expect the debtor to be able to service its debt obligation, Main Street will generally place the loan or debt security on non-accrual status and cease recognizing interest income on that loan or debt security until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a loan or debt security’s status significantly improves regarding the debtor’s ability to service the debt obligation, or if a loan or debt security is sold or written off, Main Street removes it from non-accrual status.

As of September 30, 2022, Main Street’s total Investment Portfolio had 11 investments on non-accrual status, which comprised 0.8% of its fair value and 3.7% of its cost. As of December 31, 2021, Main Street’s total Investment Portfolio had nine investments on non-accrual status, which comprised 0.7% of its fair value and 3.3% of its cost.

Main Street holds certain debt and preferred equity instruments in its Investment Portfolio that contain payment-in-kind (“PIK”) interest and cumulative dividend provisions. The PIK interest, computed at the contractual rate specified in each debt agreement, is periodically added to the principal balance of the debt and is recorded as interest income. Thus, the actual collection of this interest may be deferred until the time of debt principal repayment.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Cumulative dividends are recorded as dividend income, and any dividends in arrears are added to the balance of the preferred equity investment. The actual collection of these dividends in arrears may be deferred until such time as the preferred equity is redeemed or sold. To maintain RIC tax treatment (as discussed in Note B.9. —Summary of Significant Accounting Policies—Income Taxes below), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though Main Street may not have collected the PIK interest and cumulative dividends in cash. Main Street stops accruing PIK interest and cumulative dividends and writes off any accrued and uncollected interest and dividends in arrears when it determines that such PIK interest and dividends in arrears are no longer collectible. For the three months ended September 30, 2022 and 2021, (i) 1.2% and 2.1%, respectively, of Main Street’s total investment income was attributable to PIK interest income not paid currently in cash and (ii) 0.3% and 0.6%, respectively, of Main Street’s total investment income was attributable to cumulative dividend income not paid currently in cash. For the nine months ended September 30, 2022 and 2021, (i) 1.3% and 3.0%, respectively, of Main Street’s total investment income was attributable to PIK interest income not paid currently in cash and (ii) 0.5% and 0.6%, respectively, of Main Street’s total investment income was attributable to cumulative dividend income not paid currently in cash.

Main Street may periodically provide services, including structuring and advisory services, to its portfolio companies or other third parties. For services that are separately identifiable and evidence exists to substantiate fair value, fee income is recognized as earned, which is generally when the investment or other applicable transaction closes. Fees received in connection with debt financing transactions for services that do not meet these criteria are treated as debt origination fees and are deferred and accreted into income over the life of the financing.

A presentation of total investment income Main Street received from its Investment Portfolio in each of the periods presented is as follows:

			Three Months Ended September 30,												Nine Months Ended September 30,
			2022						2021						2022						2021
			(dollars in thousands)
Interest, fee and dividend income:
Interest income			$	75,023					$	50,468					$	198,446					$	139,882
Dividend income			19,424						23,012						53,959						59,328
Fee income			3,940						3,299						10,576						7,671
Total interest, fee and dividend income			$	98,387					$	76,779					$	262,981					$	206,881

5.Deferred Financing Costs

Deferred financing costs include commitment fees and other direct costs related to Main Street’s multi-year revolving credit facility (the “Credit Facility”) and its unsecured notes, as well as the commitment fees and leverage fees (3.4% of the total commitment and draw amounts, as applicable) on the SBIC debentures. See further discussion of Main Street’s debt in Note E—Debt. Deferred financing costs in connection with the Credit Facility are capitalized as an asset. Deferred financing costs in connection with all other debt arrangements are a direct deduction from the principal amount outstanding.

6.Equity Offering Costs

The Company’s offering costs are charged against the proceeds from equity offerings when the proceeds are received.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

7.Unearned Income—Debt Origination Fees and Original Issue Discount and Discounts / Premiums to Par Value

Main Street capitalizes debt origination fees received in connection with financings and reflects such fees as unearned income netted against the applicable debt investments. The unearned income from the fees is accreted into income over the life of the financing.

In connection with its portfolio debt investments, Main Street sometimes receives nominal cost warrants or warrants with an exercise price below the fair value of the underlying equity (together, “nominal cost equity”) that are valued as part of the negotiation process with the particular portfolio company. When Main Street receives nominal cost equity, Main Street allocates its cost basis in its investment between its debt security and its nominal cost equity at the time of origination based on amounts negotiated with the particular portfolio company. The allocated amounts are based upon the fair value of the nominal cost equity, which is then used to determine the allocation of cost to the debt security. Any discount recorded on a debt investment resulting from this allocation is reflected as unearned income, which is netted against the applicable debt investment, and accreted into interest income over the life of the debt investment. The actual collection of this interest is deferred until the time of debt principal repayment.

Main Street may also purchase debt securities at a discount or at a premium to the par value of the debt security. In the case of a purchase at a discount, Main Street records the investment at the par value of the debt security net of the discount, and the discount is accreted into interest income over the life of the debt investment. In the case of a purchase at a premium, Main Street records the investment at the par value of the debt security plus the premium, and the premium is amortized as a reduction to interest income over the life of the debt investment.

To maintain RIC tax treatment (as discussed in Note B.9.—Summary of Significant Accounting Policies—Income Taxes below), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though Main Street may not have collected the interest income. For the three months ended September 30, 2022 and 2021, 1.8% and 1.8%, respectively, of Main Street’s total investment income was attributable to interest income from the accretion of discounts associated with debt investments, net of any premium reduction. For the nine months ended September 30, 2022 and 2021, 1.9% and 2.1%, respectively, of Main Street’s total investment income was attributable to interest income from the accretion of discounts associated with debt investments, net of any premium reduction.

8.Share-Based Compensation

Main Street accounts for its share-based compensation plans using the fair value method, as prescribed by ASC 718, Compensation—Stock Compensation. Accordingly, for restricted stock awards, Main Street measures the grant date fair value based upon the market price of its common stock on the date of the grant and amortizes the fair value of the awards as share-based compensation expense over the requisite service period, which is generally the vesting term.

Main Street has also adopted Accounting Standards Update (“ASU”) 2016-09, Compensation—Stock Compensation: Improvements to Employee Share-Based Payment Accounting, which requires that all excess tax benefits and tax deficiencies (including tax benefits of dividends on share-based payment awards) be recognized as income tax expense or benefit in the income statement and not delay recognition of a tax benefit until the tax benefit is realized through a reduction to taxes payable. Accordingly, the tax effects of exercised or vested awards are treated as discrete items in the reporting period in which they occur. Additionally, Main Street has elected to account for forfeitures as they occur.

9.Income Taxes

MSCC has elected to be treated for U.S. federal income tax purposes as a RIC. MSCC’s taxable income includes the taxable income generated by MSCC and certain of its subsidiaries, including the Funds, which are treated as disregarded entities for tax purposes. As a RIC, MSCC generally will not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that MSCC distributes to its stockholders. MSCC must generally distribute at least 90% of its “investment company taxable income” (which is generally its net ordinary taxable income

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

and realized net short-term capital gains in excess of realized net long-term capital losses) and 90% of its tax-exempt income to maintain its RIC status (pass-through tax treatment for amounts distributed). As part of maintaining RIC status, undistributed taxable income (subject to a 4% non-deductible U.S. federal excise tax) pertaining to a given fiscal year may be distributed up to twelve months subsequent to the end of that fiscal year, provided such dividends are declared on or prior to the later of (i) the filing of the U.S. federal income tax return for the applicable fiscal year or (ii) the fifteenth day of the ninth month following the close of the year in which such taxable income was generated.

The Taxable Subsidiaries primarily hold certain equity investments for Main Street. The Taxable Subsidiaries permit Main Street to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes and to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The Taxable Subsidiaries are consolidated with Main Street for U.S. GAAP financial reporting purposes, and the portfolio investments held by the Taxable Subsidiaries are included in Main Street’s consolidated financial statements as portfolio investments and recorded at fair value. The Taxable Subsidiaries are not consolidated with MSCC for income tax purposes and may generate income tax expense, or benefit, and tax assets and liabilities, as a result of their ownership of certain portfolio investments. The taxable income, or loss, of the Taxable Subsidiaries may differ from their book income, or loss, due to temporary book and tax timing differences and permanent differences. The Taxable Subsidiaries are each taxed at corporate income tax rates based on their taxable income. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the Taxable Subsidiaries are reflected in Main Street’s consolidated financial statements.

The External Investment Manager is an indirect wholly-owned subsidiary of MSCC owned through a Taxable Subsidiary and is a disregarded entity for tax purposes. The External Investment Manager has entered into a tax sharing agreement with its Taxable Subsidiary owner. Since the External Investment Manager is accounted for as a portfolio investment of MSCC and is not included as a consolidated subsidiary of MSCC in MSCC’s consolidated financial statements, and as a result of the tax sharing agreement with its Taxable Subsidiary owner, for its stand-alone financial reporting purposes the External Investment Manager is treated as if it is taxed at corporate income tax rates based on its taxable income and, as a result of its activities, may generate income tax expense or benefit. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the External Investment Manager are reflected in the External Investment Manager’s separate financial statements.

The Taxable Subsidiaries and the External Investment Manager use the liability method in accounting for income taxes. Deferred tax assets and liabilities are recorded for temporary differences between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements, using statutory tax rates in effect for the year in which the temporary differences are expected to reverse. A valuation allowance is provided, if necessary, against deferred tax assets when it is more likely than not that some portion or all of the deferred tax asset will not be realized. Main Street’s net assets as included on the Consolidated Balance Sheets and Consolidated Statements of Changes in Net Assets include an adjustment to classification as a result of permanent book-to-tax differences, which include differences in the book and tax treatment of income and expenses.

Taxable income generally differs from net income for financial reporting purposes due to temporary and permanent differences in the recognition of income and expenses. Taxable income generally excludes net unrealized appreciation or depreciation, as investment gains or losses are not included in taxable income until they are realized.

10.Net Realized Gains or Losses and Net Unrealized Appreciation or Depreciation

Realized gains or losses are measured by the difference between the net proceeds from the sale or redemption of an investment or a financial instrument and the cost basis of the investment or financial instrument, without regard to unrealized appreciation or depreciation previously recognized, and includes investments written-off during the period net of recoveries and realized gains or losses from in-kind redemptions. Net unrealized appreciation or depreciation reflects the net change in the fair value of the Investment Portfolio and financial instruments and the reclassification of any prior period unrealized appreciation or depreciation on exited investments and financial instruments to realized gains or losses.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

11.Fair Value of Financial Instruments

Fair value estimates are made at discrete points in time based on relevant information. These estimates may be subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Main Street believes that the carrying amounts of its financial instruments, consisting of cash and cash equivalents, receivables, payables and other liabilities approximate the fair values of such items due to the short-term nature of these instruments.

To estimate the fair value of Main Street’s multiple tranches of unsecured debt instruments as disclosed in Note E – Debt, Main Street uses quoted market prices. For the estimated fair value of Main Street’s SBIC debentures, Main Street uses the Yield-to-Maturity valuation method based on projections of the discounted future free cash flows that the debt security will likely generate, including both the discounted cash flows of the associated interest and principal amounts for the debt security.

12.Earnings per Share

Basic and diluted per share calculations are computed utilizing the weighted-average number of shares of common stock outstanding for the period. In accordance with ASC 260, Earnings Per Share, the unvested shares of restricted stock awarded pursuant to Main Street’s equity compensation plans are participating securities and, therefore, are included in the basic earnings per share calculation. As a result, for all periods presented, there is no difference between diluted earnings per share and basic earnings per share amounts.

13.Recently Issued or Adopted Accounting Standards

In March 2020, the FASB issued ASU 2020-04, “Reference rate reform (Topic 848)—Facilitation of the effects of reference rate reform on financial reporting.” The amendments in this update provide optional expedients and exceptions for applying U.S. GAAP to certain contracts and hedging relationships that reference LIBOR or another reference rate expected to be discontinued due to reference rate reform and became effective upon issuance for all entities. The Company has agreements that have LIBOR as a reference rate with certain portfolio companies and also with certain lenders. Many of these agreements include language for choosing an alternative successor rate if LIBOR reference is no longer considered to be appropriate. Contract modifications are required to be evaluated in determining whether the modifications result in the establishment of new contracts or the continuation of existing contracts. The Company adopted this amendment in March 2020 and plans to apply the amendments in this update to account for contract modifications due to changes in reference rates when LIBOR reference is no longer used. The Company utilized the optional expedients and exceptions provided by ASU 2020-04 during the nine months ended September 30, 2022, the effect of which was not material to the consolidated financial statements and the notes thereto. The Company does not expect ASU 2022-04 to have a material impact to the consolidated financial statements and the notes thereto.

In December 2021, the SEC published Staff Accounting Bulletin No. 120 (“SAB 120”) to provide accounting and disclosure guidance for stock compensation awards made to executives and conforming amendments to the Staff Accounting Bulletin Series to align with the current authoritative accounting guidance in ASC 718, Compensation – Stock Compensation. In part, SAB 120 requires that an entity disclose how it determines the current price of underlying shares for grant-date fair value, the policy for when an adjustment to the share price is required, how it determines the amount of an adjustment to the share price and any significant assumptions used in determining an adjustment to the share price. SAB 120 is effective for all stock compensation awards issued after December 1, 2021. Main Street is in compliance with the guidance pursuant to SAB 120 for any share-based compensation disclosures. See Note J – Share-Based Compensation for further discussion of Main Street’s policies and procedures regarding share-based compensation. The impact of SAB 120 was not material to the consolidated financial statements and the notes thereto.

In June 2022, the FASB issued ASU 2022-03, “Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions.” The amendments in this update provide that a contractual restriction on the sale of

an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. The amendments in this update also require additional disclosures for equity securities subject to contractual sales restrictions. ASU 2022-03 is required for years beginning after December 15, 2023, though early

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

adoption is permitted. The Company does not expect ASU 2022-03 to have a material impact to the consolidated financial statements and the notes thereto.

From time to time, new accounting pronouncements are issued by the FASB or other standards-setting bodies that are adopted by Main Street as of the specified effective date. Main Street believes that the impact of recently issued standards and any that are not yet effective will not have a material impact on its consolidated financial statements upon adoption.

NOTE C—FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION

ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value, and enhances disclosure requirements for fair value measurements. Main Street accounts for its investments at fair value.

Fair Value Hierarchy

In accordance with ASC 820, Main Street has categorized its investments based on the priority of the inputs to the valuation technique into a three-level fair value hierarchy. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical investments (Level 1) and the lowest priority to unobservable inputs (Level 3).

Investments recorded on Main Street’s Consolidated Balance Sheets are categorized based on the inputs to the valuation techniques as follows:

Level 1—Investments whose values are based on unadjusted quoted prices for identical assets in an active market that Main Street has the ability to access (examples include investments in active exchange-traded equity securities and investments in most U.S. government and agency securities).

Level 2—Investments whose values are based on quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the investment. Level 2 inputs include the following:

•Quoted prices for similar assets in active markets (for example, investments in restricted stock);

•Quoted prices for identical or similar assets in non-active markets (for example, investments in thinly traded public companies);

•Pricing models whose inputs are observable for substantially the full term of the investment (for example, market interest rate indices); and

•Pricing models whose inputs are derived principally from, or corroborated by, observable market data through correlation or other means for substantially the full term of the investment.

Level 3—Investments whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement (for example, investments in illiquid securities issued by privately held companies). These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the investment.

As required by ASC 820, when the inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement in its entirety. For example, a Level 3 fair value measurement may include inputs that are observable (Levels 1 and 2) and unobservable (Level 3). Therefore, unrealized appreciation and depreciation related to such investments categorized within the Level 3 tables below may include changes in fair value that are attributable to both observable inputs (Levels 1 and 2) and unobservable inputs (Level 3).

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

As of September 30, 2022 and December 31, 2021, all of Main Street’s LMM portfolio investments consisted of illiquid securities issued by privately held companies and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s LMM portfolio investments were categorized as Level 3 as of September 30, 2022 and December 31, 2021.

As of September 30, 2022 and December 31, 2021, Main Street’s Private Loan portfolio investments primarily consisted of investments in interest-bearing secured debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Private Loan portfolio investments were categorized as Level 3 as of September 30, 2022 and December 31, 2021.

As of September 30, 2022 and December 31, 2021, Main Street’s Middle Market portfolio investments consisted primarily of investments in secured and unsecured debt investments and independently rated debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Middle Market portfolio investments were categorized as Level 3 as of September 30, 2022 and December 31, 2021.

As of September 30, 2022 and December 31, 2021, Main Street’s Other Portfolio investments consisted of illiquid securities issued by privately held companies and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s Other Portfolio investments were categorized as Level 3 as of September 30, 2022 and December 31, 2021.

As of September 30, 2022, Main Street held one short-term portfolio investment, which was a secured debt investment. The fair value determination for this investment consisted of available observable inputs in non-active markets sufficient to determine the fair value of the investment. As a result, Main Street’s short-term portfolio investment was categorized as Level 2 as of September 30, 2022. As of December 31, 2021, Main Street held one short-term portfolio investment, which was a secured debt investment. The fair value determination for this investment consisted of available observable inputs in non-active markets sufficient to determine the fair value of the investment. As a result, Main Street’s short-term portfolio investment was categorized as Level 2 as of December 31, 2021.

The fair value determination of each portfolio investment categorized as Level 3 required one or more of the following unobservable inputs:

•Financial information obtained from each portfolio company, including unaudited statements of operations and balance sheets for the most recent period available as compared to budgeted numbers;

•Current and projected financial condition of the portfolio company;

•Current and projected ability of the portfolio company to service its debt obligations;

•Type and amount of collateral, if any, underlying the investment;

•Current financial ratios (e.g., fixed charge coverage ratio, interest coverage ratio and net debt/EBITDA ratio) applicable to the investment;

•Current liquidity of the investment and related financial ratios (e.g., current ratio and quick ratio);

•Pending debt or capital restructuring of the portfolio company;

•Projected operating results of the portfolio company;

•Current information regarding any offers to purchase the investment;

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

•Current ability of the portfolio company to raise any additional financing as needed;

•Changes in the economic environment which may have a material impact on the operating results of the portfolio company;

•Internal occurrences that may have an impact (both positive and negative) on the operating performance of the portfolio company;

•Qualitative assessment of key management;

•Contractual rights, obligations or restrictions associated with the investment; and

•Other factors deemed relevant.

The use of significant unobservable inputs creates uncertainty in the measurement of fair value as of the reporting date. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM equity securities, which are generally valued through an average of the discounted cash flow technique and the market comparable/enterprise value technique (unless one of these approaches is determined to not be appropriate), are (i) EBITDA multiples and (ii) the weighted-average cost of capital (“WACC”). Significant increases (decreases) in EBITDA multiple inputs in isolation would result in a significantly higher (lower) fair value measurement. On the contrary, significant increases (decreases) in WACC inputs in isolation would result in a significantly lower (higher) fair value measurement. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM, Private Loan and Middle Market securities are (i) risk adjusted discount rates used in the Yield-to-Maturity valuation technique (see Note B.1.—Valuation of the Investment Portfolio) and (ii) the percentage of expected principal recovery. Significant increases (decreases) in any of these discount rates in isolation would result in a significantly lower (higher) fair value measurement. Significant increases (decreases) in any of these expected principal recovery percentages in isolation would result in a significantly higher (lower) fair value measurement. However, due to the nature of certain investments, fair value measurements may be based on other criteria, such as third-party appraisals of collateral and fair values as determined by independent third parties, which are not presented in the tables below.

The following tables provide a summary of the significant unobservable inputs used to fair value Main Street’s Level 3 portfolio investments as of September 30, 2022 and December 31, 2021:

Type of Investment						Fair Value as of September 30, 2022 (in thousands)						Valuation Technique						Significant Unobservable Inputs						Range(3)						Weighted Average(3)						Median(3)
Equity investments						$	1,105,236					Discounted cash flow						WACC						9.4% - 22.4%						14.5		%				15.6		%
												Market comparable / Enterprise value						EBITDA multiple (1)						4.3x - 8.3x (2)						6.7x						6.0x
Debt investments						$	2,548,347					Discounted cash flow						Risk adjusted discount factor						6.5% - 17.0% (2)						10.3		%				10.4		%
																		Expected principal recovery percentage						0.0% - 200.0%						99.6		%				100.0		%
Debt investments						$	318,052					Market approach						Third-party quote						5.6 - 98.9						90.6						93.0
Total Level 3 investments						$	3,971,635

____________________

(1)EBITDA may include proforma adjustments and/or other addbacks based on specific circumstances related to each investment.

(2)Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.2x - 15.7x and the range for risk adjusted discount factor is 5.0% - 35.4%.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

(3)Does not include investments for which the valuation technique does not include the use of the applicable fair value input.

Type of Investment						Fair Value as of December 31, 2021 (in thousands)						Valuation Technique						Significant Unobservable Inputs						Range(3)						Weighted Average(3)						Median(3)
Equity investments						$	1,050,269					Discounted cash flow						WACC						9.1% - 20.6%						13.8		%				14.8		%
												Market comparable / Enterprise value						EBITDA multiple (1)						4.8x - 7.7x(2)						6.6x						5.9x
Debt investments						$	2,158,424					Discounted cash flow						Risk adjusted discount factor						5.6% - 15.7%(2)						9.8		%				9.3		%
																		Expected principal recovery percentage						0.0% - 100.0%						99.6		%				100.0		%
Debt investments						$	351,144					Market approach						Third-party quote						3.0 - 100.5						94.4						99.0
Total Level 3 investments						$	3,559,837

____________________

(1)EBITDA may include proforma adjustments and/or other addbacks based on specific circumstances related to each investment.

(2)Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.2x - 11.0x and the range for risk adjusted discount factor is 4.2% - 38.5%.

(3)Does not include investments for which the valuation technique does not include the use of the applicable fair value input.

The following tables provide a summary of changes in fair value of Main Street’s Level 3 portfolio investments for the nine-month periods ended September 30, 2022 and 2021 (amounts in thousands):

Type of Investment						Fair Value as of December 31, 2021						Transfers Into Level 3 Hierarchy						Redemptions/ Repayments						New Investments						Net Changes from Unrealized to Realized						Net Unrealized Appreciation (Depreciation)						Other(1)						Fair Value as of September 30, 2022
Debt						$	2,509,568					$	—					$	(436,372)					$	869,214					$	9,632					$	(78,710)					$	(6,933)					$	2,866,399
Equity						1,043,709						—						(49,447)						47,475						(11,801)						63,591						6,933						1,100,460
Equity Warrant						6,560						—						(474)						—						(615)						(696)						—						4,775
						$	3,559,837					$	—					$	(486,293)					$	916,689					$	(2,784)					$	(15,815)					$	—					$	3,971,635

____________________

(1)Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information in the Consolidated Statements of Cash Flows.

Type of Investment						Fair Value as of December 31, 2020						Transfers Into Level 3 Hierarchy						Redemptions/ Repayments						New Investments						Net Changes from Unrealized to Realized						Net Unrealized Appreciation (Depreciation)						Other(1)						Fair Value as of September 30, 2021
Debt						$	1,807,134					$	—					$	(528,158)					$	814,863					$	13,279					$	2,115					$	(3,485)					$	2,105,748
Equity						866,734						—						(64,335)						48,181						(2,826)						115,774						5,767						969,295
Equity Warrant						10,998						—						—						—						(1,940)						944						(2,282)						7,720
						$	2,684,866					$	—					$	(592,493)					$	863,044					$	8,513					$	118,833					$	—					$	3,082,763

____________________

(1)Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information in the Consolidated Statements of Cash Flows.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

At September 30, 2022 and December 31, 2021, Main Street’s investments at fair value were categorized as follows in the fair value hierarchy for ASC 820 purposes:

												Fair Value Measurements
												(in thousands)
At September 30, 2022						Fair Value						Quoted Prices in Active Markets for Identical Assets (Level 1)						Significant Other Observable Inputs (Level 2)						Significant Unobservable Inputs (Level 3)
LMM portfolio investments						$	1,910,915					$	—					$	—					$	1,910,915
Private Loan portfolio investments						1,476,934						—						—						1,476,934
Middle Market portfolio investments						354,286						—						—						354,286
Other Portfolio investments						117,010						—						—						117,010
External Investment Manager						112,490						—						—						112,490
Short-term portfolio investments						1,855						—						1,855						—
Total investments						$	3,973,490					$	—					$	1,855					$	3,971,635

												Fair Value Measurements
												(in thousands)
At December 31, 2021						Fair Value						Quoted Prices in Active Markets for Identical Assets (Level 1)						Significant Other Observable Inputs (Level 2)						Significant Unobservable Inputs (Level 3)
LMM portfolio investments						$	1,716,415					$	—					$	—					$	1,716,415
Private Loan portfolio investments						1,141,772						—						—						1,141,772
Middle Market portfolio investments						395,167						—						—						395,167
Other Portfolio investments						166,083						—						—						166,083
External Investment Manager						140,400						—						—						140,400
Short-term portfolio investments						1,994						—						1,994						—
Total investments						$	3,561,831					$	—					$	1,994					$	3,559,837

Investment Portfolio Composition

Main Street’s principal investment objective is to maximize its portfolio’s total return by generating current income from its debt investments and current income and capital appreciation from its equity and equity-related investments, including warrants, convertible securities and other rights to acquire equity securities in a portfolio company. Main Street seeks to achieve its investment objective through its LMM, Private Loan and Middle Market investment strategies.

Main Street’s LMM investment strategy involves investments in secured debt, equity warrants and direct equity investments in privately held, LMM companies based in the United States. Main Street’s LMM portfolio companies generally have annual revenues between $10 million and $150 million, and its LMM investments generally range in size from $5 million to $75 million. The LMM debt investments are typically secured by a first priority lien on the assets of the portfolio company, can include either fixed or floating rate terms and generally have a term of between five and seven years from the original investment date. In most LMM portfolio investments, Main Street receives nominally priced equity warrants and/or makes direct equity investments in connection with a debt investment.

Main Street’s private loan (“Private Loan”) investment strategy involves investments in privately held companies that are generally consistent with the size of its LMM portfolio companies or Middle Market portfolio companies, and its Private Loan investments generally range in size from $10 million to $75 million. Main Street’s Private Loan investments generally consist of loans that have been originated directly by Main Street or through strategic

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

relationships with other investment funds on a collaborative basis, and are often referred to in the debt markets as “club deals.” Main Street’s Private Loan portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have a term of between three and seven years from the original investment date. Main Street may have the option to invest alongside the sponsor in the equity securities of its Private Loan portfolio companies.

Main Street’s Middle Market investment strategy involves investments in syndicated loans to or debt securities in Middle Market companies, which Main Street defines as companies with annual revenues between $150 million and $1.5 billion, and its Middle Market investments generally range in size from $3 million to $25 million. Main Street’s Middle Market portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have an expected duration of between three and seven years from the original investment date.

Main Street’s other portfolio (“Other Portfolio”) investments primarily consist of investments that are not consistent with the typical profiles for its LMM, Private Loan or Middle Market portfolio investments, including investments which may be managed by third parties. In the Other Portfolio, Main Street may incur indirect fees and expenses in connection with investments managed by third parties, such as investments in other investment companies or private funds. For Other Portfolio investments, Main Street generally receives distributions related to the assets held by the portfolio company. Those assets are typically expected to be liquidated over a five to ten-year period.

Based upon Main Street’s liquidity and capital structure management activities, Main Street’s Investment Portfolio may also include short-term portfolio investments that are atypical of Main Street’s LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital. Those assets are typically expected to be liquidated in one year or less. These short-term portfolio investments are not expected to be a significant portion of the overall Investment Portfolio.

Main Street’s external asset management business is conducted through its External Investment Manager. The External Investment Manager earns management fees based on the assets under management for external parties and may earn incentive fees, or a carried interest, based on the performance of the assets managed. Main Street entered into an agreement with the External Investment Manager to share employees in connection with its asset management business generally, and specifically for its relationship with MSC Income Fund, Inc. (“MSC Income”). Through this agreement, Main Street shares employees with the External Investment Manager, including their related infrastructure, business relationships, management expertise and capital raising capabilities. Main Street allocates the related expenses to the External Investment Manager pursuant to the sharing agreement. Main Street’s total expenses for the three months ended September 30, 2022 and 2021 are net of expenses allocated to the External Investment Manager of $3.3 million and $2.7 million, respectively, and for the nine months ended September 30, 2022 and 2021 of $9.6 million and $7.7 million, respectively.

Investment income, consisting of interest, dividends and fees, can fluctuate dramatically due to various factors, including the level of new investment activity, repayments of debt investments or sales of equity interests. Investment income in any given year could also be highly concentrated among several portfolio companies. For the three and nine months ended September 30, 2022 and 2021, Main Street did not record investment income from any single portfolio company in excess of 10% of total investment income.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

The following tables provide a summary of Main Street’s investments in the LMM, Private Loan and Middle Market portfolios as of September 30, 2022 and December 31, 2021 (this information excludes the Other Portfolio, short-term portfolio investments and the External Investment Manager, which are discussed further below):

						As of September 30, 2022
						LMM (a)						Private Loan						Middle Market
						(dollars in millions)
Number of portfolio companies						75						87						33
Fair value						$	1,910.9					$	1,476.9					$	354.3
Cost						$	1,593.7					$	1,523.8					$	419.4
Debt investments as a % of portfolio (at cost)						73.0		%				97.1		%				94.4		%
Equity investments as a % of portfolio (at cost)						27.0		%				2.9		%				5.6		%
% of debt investments at cost secured by first priority lien						99.1		%				99.9		%				98.8		%
Weighted-average annual effective yield (b)						11.8		%				9.9		%				9.6		%
Average EBITDA (c)						$	7.7					$	41.9					$	70.7

____________________

(a)At September 30, 2022, Main Street had equity ownership in all of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 41%.

(b)The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of September 30, 2022, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield on Main Street’s debt portfolio as of September 30, 2022 including debt investments on non-accrual status was 11.1% for its LMM portfolio, 9.6% for its Private Loan portfolio and 9.1% for its Middle Market portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor.

(c)The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan and Middle Market portfolios. These calculations exclude certain portfolio companies, including three LMM portfolio companies and two Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate.

						As of December 31, 2021
						LMM (a)						Private Loan						Middle Market
						(dollars in millions)
Number of portfolio companies						73						75						36
Fair value						$	1,716.4					$	1,141.8					$	395.2
Cost						$	1,455.7					$	1,157.5					$	440.9
Debt investments as a % of portfolio (at cost)						70.9		%				95.7		%				93.3		%
Equity investments as a % of portfolio (at cost)						29.1		%				4.3		%				6.7		%
% of debt investments at cost secured by first priority lien						99.0		%				98.7		%				98.7		%
Weighted-average annual effective yield (b)						11.2		%				8.2		%				7.5		%
Average EBITDA (c)						$	6.2					$	41.3					$	76.0

____________________

(a)At December 31, 2021, Main Street had equity ownership in all of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 40%.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

(b)The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of December 31, 2021, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield on Main Street’s debt portfolio as of December 31, 2021 including debt investments on non-accrual status was 10.6% for its LMM portfolio, 8.0% for its Private Loan portfolio and 6.9% for its Middle Market portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor.

(c)The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan and Middle Market portfolios. These calculations exclude certain portfolio companies, including three LMM portfolio companies, three Private Loan portfolio companies and one Middle Market portfolio company, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate.

For the three months ended September 30, 2022 and 2021, Main Street achieved an annualized total return on investments of 10.5% and 18.0%, respectively. For the nine months ended September 30, 2022 and 2021, Main Street achieved an annualized total return on investments of 9.6% and 16.6%, respectively. For the year ended December 31, 2021, Main Street achieved a total return on investments of 16.6%. Total return on investments is calculated using the interest, dividend and fee income, as well as the realized and unrealized change in fair value of the Investment Portfolio for the specified period. Main Street’s total return on investments is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor.

As of September 30, 2022, Main Street had Other Portfolio investments in 14 companies, collectively totaling $117.0 million in fair value and $121.3 million in cost basis and which comprised 2.9% and 3.3% of Main Street’s Investment Portfolio at fair value and cost, respectively. As of December 31, 2021, Main Street had Other Portfolio investments in 13 companies, collectively totaling $166.1 million in fair value and $173.7 million in cost basis and which comprised 4.7% and 5.3% of Main Street’s Investment Portfolio at fair value and cost, respectively.

As discussed further in Note A.1—Organization and Basis of Presentation—Organization, Main Street holds an investment in the External Investment Manager, a wholly-owned subsidiary that is treated as a portfolio investment. As of September 30, 2022, this investment had a fair value of $112.5 million and a cost basis of $29.5 million, which comprised 2.8% and 0.8% of Main Street’s Investment Portfolio at fair value and cost, respectively. As of December 31, 2021, this investment had a fair value of $140.4 million and a cost basis of $29.5 million, which comprised 3.9% and 0.9% of Main Street’s Investment Portfolio at fair value and cost, respectively.

The following tables summarize the composition of Main Street’s total combined LMM portfolio investments, Private Loan portfolio investments and Middle Market portfolio investments at cost and fair value by type of investment as a percentage of the total combined LMM portfolio investments, Private Loan portfolio investments and Middle Market portfolio investments, as of September 30, 2022 and December 31, 2021 (this information excludes the Other Portfolio investments, short-term portfolio investments and the External Investment Manager, which are discussed above).

Cost:						September 30, 2022						December 31, 2021
First lien debt						85.4		%				82.5		%
Equity						13.9						16.2
Second lien debt						0.1						0.6
Equity warrants						0.2						0.3
Other						0.4						0.4
						100.0		%				100.0		%

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Fair Value:						September 30, 2022						December 31, 2021
First lien debt						76.1		%				74.3		%
Equity						23.2						24.6
Second lien debt						0.2						0.5
Equity warrants						0.1						0.2
Other						0.4						0.4
						100.0		%				100.0		%

The following tables summarize the composition of Main Street’s total combined LMM portfolio investments, Private Loan portfolio investments and Middle Market portfolio investments by geographic region of the United States and other countries at cost and fair value as a percentage of the total combined LMM portfolio investments, Private Loan portfolio investments and Middle Market portfolio investments, as of September 30, 2022 and December 31, 2021 (this information excludes the Other Portfolio, short-term portfolio investments and the External Investment Manager). The geographic composition is determined by the location of the corporate headquarters of the portfolio company.

Cost:						September 30, 2022						December 31, 2021
West						28.1		%				28.3		%
Southwest						20.7						21.6
Northeast						20.6						22.6
Midwest						15.2						15.1
Southeast						13.2						11.6
Canada						0.6						0.8
Other Non-United States						1.6						—
						100.0		%				100.0		%

Fair Value:						September 30, 2022						December 31, 2021
West						28.4		%				28.5		%
Southwest						22.1						23.0
Northeast						20.3						21.9
Midwest						15.4						15.8
Southeast						11.7						10.0
Canada						0.6						0.8
Other Non-United States						1.5						—
						100.0		%				100.0		%

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Main Street’s LMM portfolio investments, Private Loan portfolio investments and Middle Market portfolio investments are in companies conducting business in a variety of industries. The following tables summarize the composition of Main Street’s total combined LMM portfolio investments, Private Loan portfolio investments and Middle Market portfolio investments by industry at cost and fair value as of September 30, 2022 and December 31, 2021 (this information excludes the Other Portfolio, short-term portfolio investments and the External Investment Manager).

Cost:						September 30, 2022						December 31, 2021
Internet Software & Services						8.0		%				7.2		%
Machinery						8.0						7.3
Commercial Services & Supplies						6.9						5.9
Construction & Engineering						6.3						7.8
Diversified Consumer Services						4.8						3.4
Leisure Equipment & Products						4.6						4.1
Health Care Providers & Services						4.6						3.9
Professional Services						4.2						4.6
Distributors						4.2						4.7
Energy Equipment & Services						3.8						4.0
IT Services						3.4						3.5
Specialty Retail						3.2						3.5
Tobacco						3.2						2.1
Containers & Packaging						2.9						2.3
Aerospace & Defense						2.4						1.9
Media						2.4						1.8
Building Products						2.0						2.3
Textiles, Apparel & Luxury Goods						1.9						2.2
Communications Equipment						1.8						2.3
Diversified Telecommunication Services						1.8						2.6
Software						1.7						1.8
Diversified Financial Services						1.5						2.1
Food Products						1.6						2.0
Internet & Catalog Retail						1.4						1.6
Health Care Equipment & Supplies						1.3						0.3
Food & Staples Retailing						1.2						0.8
Chemicals						1.2						1.7
Computers & Peripherals						1.2						1.3
Oil, Gas & Consumable Fuels						1.1						1.8
Electronic Equipment, Instruments & Components						1.1						1.4
Hotels, Restaurants & Leisure						1.1						1.4
Household Durables						0.8						1.0
Life Sciences Tools & Services						0.5						1.4
Other (1)						3.9						4.0
						100.0		%				100.0		%

____________________

(1)Includes various industries with each industry individually less than 1.0% of the total combined LMM portfolio investments, Private Loan portfolio investments and Middle Market portfolio investments at each date.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Fair Value:						September 30, 2022						December 31, 2021
Machinery						8.9		%				8.5		%
Diversified Consumer Services						7.0						5.9
Internet Software & Services						6.9						6.4
Commercial Services & Supplies						6.3						5.5
Construction & Engineering						6.1						7.7
Distributors						4.5						4.7
Health Care Providers & Services						4.3						3.6
Leisure Equipment & Products						4.1						4.0
Professional Services						3.9						3.9
Specialty Retail						3.7						4.1
Tobacco						3.4						2.2
IT Services						3.2						3.3
Containers & Packaging						3.1						2.5
Media						3.0						2.2
Energy Equipment & Services						2.8						2.8
Aerospace & Defense						2.2						1.7
Software						2.0						2.0
Textiles, Apparel & Luxury Goods						1.9						2.1
Building Products						1.9						2.2
Computers & Peripherals						1.9						2.2
Diversified Financial Services						1.7						2.3
Diversified Telecommunication Services						1.7						2.5
Food Products						1.7						1.9
Internet & Catalog Retail						1.5						1.5
Food & Staples Retailing						1.2						0.8
Chemicals						1.1						1.6
Health Care Equipment & Supplies						1.0						0.1
Communications Equipment						1.0						1.5
Construction Materials						1.0						1.1
Oil, Gas & Consumable Fuels						0.9						1.4
Hotels, Restaurants & Leisure						0.8						1.0
Life Sciences Tools & Services						0.4						1.3
Other (1)						4.9						5.5
						100.0						100.0

____________________

(1)Includes various industries with each industry individually less than 1.0% of the total combined LMM portfolio investments, Private Loan portfolio investments and Middle Market portfolio investments at each date.

At September 30, 2022 and December 31, 2021, Main Street had no portfolio investment that was greater than 10% of the Investment Portfolio at fair value.

Unconsolidated Significant Subsidiaries

In accordance with Rules 3-09 and 4-08(g) of Regulation S-X, Main Street must determine which of its unconsolidated controlled portfolio companies, if any, are considered “significant subsidiaries.” In evaluating its unconsolidated controlled portfolio companies in accordance with Regulation S-X, there are two tests that Main Street

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

must utilize to determine if any of Main Street’s Control Investments (as defined in Note A–Organization and Basis of Presentation, including those unconsolidated portfolio companies defined as Control Investments in which Main Street does not own greater than 50% of the voting securities nor have rights to maintain greater than 50% of the board representation) are considered significant subsidiaries: the investment test and the income test. The investment test is generally measured by dividing Main Street’s investment in the Control Investment by the value of Main Street’s total investments. The income test is generally measured by dividing the absolute value of the combined sum of total investment income, net realized gain (loss) and net unrealized appreciation (depreciation) from the relevant Control Investment for the period being tested by the absolute value of Main Street’s change in net assets resulting from operations for the same period. Rules 3-09 and 4-08(g) of Regulation S-X require Main Street to include (1) separate audited financial statements of an unconsolidated majority-owned subsidiary (Control Investments in which Main Street owns greater than 50% of the voting securities) in an annual report and (2) summarized financial information of a Control Investment in a quarterly report, respectively, if certain thresholds of the investment or income tests are exceeded and the unconsolidated portfolio company qualifies as a significant subsidiary.

As of September 30, 2022 and December 31, 2021, Main Street had no single investment that qualified as a significant subsidiary under either the investment or income tests.

NOTE D—EXTERNAL INVESTMENT MANAGER

As discussed further in Note A.1—Organization and Basis of Presentation—Organization and Note C—Fair Value Hierarchy for Investments—Portfolio Composition—Investment Portfolio Composition, the External Investment Manager provides investment management and other services to External Parties. The External Investment Manager is accounted for as a portfolio investment of MSCC since the External Investment Manager conducts all of its investment management activities for External Parties.

The External Investment Manager serves as the investment adviser and administrator to MSC Income pursuant to an Investment Advisory and Administrative Services Agreement entered into in October 2020 between the External Investment Manager and MSC Income (the “Advisory Agreement”). Under the Advisory Agreement, the External Investment Manager earns a 1.75% annual base management fee on MSC Income’s average total assets, an incentive fee equal to 20% of pre-investment fee net investment income above a specified investment return hurdle rate and a 20% incentive fee on cumulative net realized capital gains in exchange for providing advisory services to MSC Income.

As described more fully in Note L – Related Party Transactions, the External Investment Manager also serves as the investment adviser and administrator to MS Private Loan Fund I, LP, a private investment fund with a strategy to co-invest with Main Street in Private Loan portfolio investments (the “Private Loan Fund”). The External Investment Manager entered into an Investment Management Agreement in December 2020 with the Private Loan Fund, pursuant to which the External Investment Manager provides investment advisory and management services to the Private Loan Fund in exchange for an asset-based fee and certain incentive fees. The External Investment Manager may also advise other clients, including funds and separately managed accounts, pursuant to advisory and services agreements with such clients in exchange for asset-based and incentive fees.

The External Investment Manager provides administrative services for certain External Party clients that, to the extent not waived, are reported as administrative services fees. The administrative services fees generally represent expense reimbursements for a portion of the compensation, overhead and related expenses for certain professionals directly attributable to performing administrative services for clients. These fees are recognized as other revenue in the period in which the related services are rendered.

Main Street determines the fair value of the External Investment Manager using the Waterfall valuation method under the market approach (see further discussion in Note B.1.—Summary of Significant Accounting Policies—Valuation of the Investment Portfolio). Any change in fair value of the investment in the External Investment Manager is recognized on Main Street’s Consolidated Statements of Operations in “Net Unrealized Appreciation (Depreciation)—Control investments.”

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

The External Investment Manager is an indirect wholly-owned subsidiary of MSCC owned through a Taxable Subsidiary and is a disregarded entity for tax purposes. The External Investment Manager has entered into a tax sharing agreement with its Taxable Subsidiary owner. Since the External Investment Manager is accounted for as a portfolio investment of Main Street and is not included as a consolidated subsidiary of Main Street in its consolidated financial statements, and as a result of the tax sharing agreement with its Taxable Subsidiary owner, for financial reporting purposes the External Investment Manager is treated as if it is taxed at corporate income tax rates based on its taxable income and, as a result of its activities, may generate income tax expense or benefit. Main Street owns the External Investment Manager through the Taxable Subsidiary to allow MSCC to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The taxable income, or loss, of the External Investment Manager may differ from its book income, or loss, due to temporary book and tax timing differences and permanent differences. As a result of the above described financial reporting and tax treatment, the External Investment Manager provides for any income tax expense, or benefit, and any tax assets or liabilities in its separate financial statements.

Main Street shares employees with the External Investment Manager and allocates costs related to such shared employees to the External Investment Manager generally based on a combination of the direct time spent, new investment origination activity and assets under management, depending on the nature of the expense. The total contribution of the External Investment Manager to Main Street’s net investment income consists of the combination of the expenses allocated to the External Investment Manager and the dividend income earned from the External Investment Manager. For the three months ended September 30, 2022 and 2021, the total contribution to Main Street’s net investment income was $5.0 million and $4.2 million, respectively. For the nine months ended September 30, 2022 and 2021, the total contribution to Main Street’s net investment income was $15.2 million and $11.6 million, respectively.

Summarized financial information from the separate financial statements of the External Investment Manager as of September 30, 2022 and December 31, 2021 and for the three and nine months ended September 30, 2022 and 2021 is as follows:

			As of						As of
			September 30, 2022						December 31, 2021
			(dollars in thousands)
Cash			$	309					$	—
Accounts receivable - advisory clients			5,917						5,595
Intangible Asset			29,500						29,500
Total assets			$	35,726					$	35,095
Accounts payable to MSCC and its subsidiaries			$	4,588					$	3,288
Dividend payable to MSCC and its subsidiaries			1,638						2,307
Equity			29,500						29,500
Total liabilities and equity			$	35,726					$	35,095

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

			Three Months Ended September 30,												Nine Months Ended September 30,
			2022						2021						2022						2021
			(dollars in thousands)
Management fee income			$	5,472					$	4,592					$	16,337					$	12,707
Incentive fees			(182)						19						45						19
Administrative services fees			154						—						458						—
Total revenues			5,444						4,611						16,840						12,726
Expenses allocated from MSCC or its subsidiaries:
Salaries, share-based compensation and other personnel costs			(2,660)						(2,278)						(7,572)						(6,394)
Other G&A expenses			(674)						(450)						(2,041)						(1,286)
Total allocated expenses			(3,334)						(2,728)						(9,613)						(7,680)
Pre-tax income			2,110						1,883						7,227						5,046
Tax expense			(472)						(424)						(1,605)						(1,138)
Net income			$	1,638					$	1,459					$	5,622					$	3,908

NOTE E—DEBT

Summary of debt as of September 30, 2022 is as follows:

			Outstanding Balance						Unamortized Debt Issuance (Costs)/Premiums (2)						Recorded Value						Estimated Fair Value (1)
			(in thousands)
Credit Facility			$	561,000					$	—					$	561,000					$	561,000
3.00% Notes due 2026			500,000						(1,996)						498,004						422,715
5.20% Notes due 2024			450,000						863						450,863						444,114
SBIC Debentures			350,000						(6,382)						343,618						288,546
4.50% Notes due 2022			185,000						(101)						184,899						184,819
Total Debt			$	2,046,000					$	(7,616)					$	2,038,384					$	1,901,194

____________________

(1)Estimated fair value for outstanding debt if Main Street had adopted the fair value option under ASC 825. See discussion of the methods used to estimate the fair value of Main Street’s debt in Note B.11.—Summary of Significant Accounting Policies—Fair Value of Financial Instruments.

(2)The unamortized debt issuance costs for the Credit Facility are reflected as Deferred financing costs on the Consolidated Balance Sheets, while the deferred debt issuance costs related to the 3.00% Notes due 2026, 5.20% Notes due 2024, 4.50% Notes due 2022 and SBIC Debentures are reflected as contra-liabilities on the Consolidated Balance Sheets.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Summary of debt as of December 31, 2021 is as follows:

			Outstanding Balance						Unamortized Debt Issuance (Costs)/Premiums (2)						Recorded Value						Estimated Fair Value (1)
			(in thousands)
Credit Facility			$	320,000					$	—					$	320,000					$	320,000
3.00% Notes due 2026			500,000						(2,391)						497,609						502,285
5.20% Notes due 2024			450,000						1,272						451,272						480,767
SBIC Debentures			350,000						(7,269)						342,731						328,206
4.50% Notes due 2022			185,000						(556)						184,444						190,043
Total Debt			$	1,805,000					$	(8,944)					$	1,796,056					$	1,821,301

____________________

(1)Estimated fair value for outstanding debt if Main Street had adopted the fair value option under ASC 825. See discussion of the methods used to estimate the fair value of Main Street’s debt in Note B.11.—Summary of Significant Accounting Policies—Fair Value of Financial Instruments.

(2)The unamortized debt issuance costs for the Credit Facility are reflected as Deferred financing costs on the Consolidated Balance Sheets, while the deferred debt issuance costs related to the 3.00% Notes due 2026, 5.20% Notes due 2024, 4.50% Notes due 2022 and SBIC Debentures are reflected as contra-liabilities on the Consolidated Balance Sheets.

Summarized interest expense for the three and nine months ended September 30, 2022 and 2021 is as follows:

			Three Months Ended September 30,												Nine Months Ended September 30,
			2022						2021						2022						2021
			(dollars in thousands)
Credit Facility			$	6,551					$	1,574					$	11,249					$	3,948
3.00% Notes due 2026			3,882						2,487						11,645						7,124
5.20% Notes due 2024			5,714						5,714						17,141						17,141
SBIC Debentures			2,855						2,704						8,482						8,002
4.50% Notes due 2022			2,233						2,233						6,699						6,699
Total Interest Expense			$	21,234					$	14,711					$	55,216					$	42,914

SBIC Debentures

Under existing SBIC regulations, SBA-approved SBICs under common control have the ability to issue debentures guaranteed by the SBA up to a regulatory maximum amount of $350.0 million. Main Street’s SBIC debentures payable, under existing SBA-approved commitments, were $350.0 million at both September 30, 2022 and December 31, 2021. SBIC debentures provide for interest to be paid semiannually, with principal due at the applicable 10-year maturity date of each debenture. Main Street expects to maintain SBIC debentures under the SBIC program in the future, subject to periodic repayments and borrowings, in an amount up to the regulatory maximum amount for affiliated SBIC funds. The weighted-average annual interest rate on the SBIC debentures was 2.9% as of September 30, 2022 and December 31, 2021. The first principal maturity due under the existing SBIC debentures is in 2023, and the weighted-average remaining duration as of September 30, 2022 was 5.4 years. In accordance with SBIC regulations, the Funds are precluded from incurring additional non-SBIC debt without the prior approval of the SBA.

As of September 30, 2022, the SBIC debentures consisted of (i) $175.0 million par value of SBIC debentures outstanding issued by MSMF, with a recorded value of $171.9 million that was net of unamortized debt issuance costs of

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

$3.1 million and (ii) $175.0 million par value of SBIC debentures issued by MSC III with a recorded value of $171.7 million that was net of unamortized debt issuance costs of $3.3 million.

Credit Facility

Main Street maintains the Credit Facility to provide additional liquidity to support its investment and operational activities. As of September 30, 2022, the Credit Facility included total commitments of $920.0 million from a diversified group of 18 lenders, held a maturity date in August 2027 and contained an accordion feature with the right to request an increase in commitments under the facility from new and existing lenders on the same terms and conditions as the existing commitments up to a total of $1.4 billion.

As of September 30, 2022, borrowings under the Credit Facility bore interest, subject to Main Street’s election and resetting on a monthly basis on the first of each month, on a per annum basis at a rate equal to the applicable SOFR rate plus an applicable credit spread adjustment of 0.10% plus (i) 1.875% (or the applicable Prime Rate plus 0.875%) as long as Main Street meets certain agreed upon excess collateral and maximum leverage requirements or (ii) 2.0% (or the applicable Prime Rate plus 1.0%) otherwise. Main Street pays unused commitment fees of 0.25% per annum on the unused lender commitments under the Credit Facility. The Credit Facility is secured by a first lien on the assets of MSCC and its subsidiaries, excluding the equity ownership or assets of the Funds and the External Investment Manager. As of September 30, 2022, the Credit Facility contained certain affirmative and negative covenants, including but not limited to: (i) maintaining minimum liquidity, (ii) maintaining an interest coverage ratio of at least 2.0 to 1.0, (iii) maintaining a 1940 Act asset coverage ratio of at least 1.5 to 1.0, (iv) maintaining a minimum tangible net worth and (v) maintaining a minimum asset coverage ratio of 200% with respect to the consolidated assets (with certain limitations on the contribution of equity in financing subsidiaries as specified therein) of MSCC and the guarantors under the Credit Facility to the secured debt of MSCC and the guarantors.

As of September 30, 2022, the interest rate on the Credit Facility was 4.5%. The average interest rate for borrowings under the Credit Facility was 4.1% and 2.0% for the three months ended September 30, 2022 and 2021, respectively, and 2.9% and 2.0% for the nine months ended September 30, 2022 and 2021, respectively. As of September 30, 2022, Main Street was in compliance with all financial covenants of the Credit Facility.

4.50% Notes due 2022

In November 2017, Main Street issued $185.0 million in aggregate principal amount of 4.50% unsecured notes due December 1, 2022 (the “4.50% Notes”) at an issue price of 99.16%. The 4.50% Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness; senior to any of its future indebtedness that expressly provides it is subordinated to the 4.50% Notes; effectively subordinated to all of its existing and future secured indebtedness, to the extent of the value of the assets securing such indebtedness, including borrowings under its Credit Facility; and structurally subordinated to all existing and future indebtedness and other obligations of any of its subsidiaries, including without limitation, the indebtedness of the Funds. The 4.50% Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. The 4.50% Notes bear interest at a rate of 4.50% per year payable semiannually on June 1 and December 1 of each year. The total net proceeds from the 4.50% Notes, resulting from the issue price and after underwriting discounts and estimated offering expenses payable, were $182.2 million. Main Street may from time to time repurchase the 4.50% Notes in accordance with the 1940 Act and the rules promulgated thereunder.

The indenture governing the 4.50% Notes (the “4.50% Notes Indenture”) contains certain covenants, including covenants requiring Main Street’s compliance with (regardless of whether Main Street is subject to) the asset coverage requirements set forth in Section 18(a)(1)(A) as modified by Section 61(a)(1) of the 1940 Act, as well as covenants requiring Main Street to provide financial information to the holders of the 4.50% Notes and the trustee if Main Street ceases to be subject to the reporting requirements of the Exchange Act. These covenants are subject to limitations and exceptions that are described in the 4.50% Notes Indenture. As of September 30, 2022, Main Street was in compliance with these covenants.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

5.20% Notes due 2024

In April 2019, Main Street issued $250.0 million in aggregate principal amount of 5.20% unsecured notes due May 1, 2024 (the “5.20% Notes”) at an issue price of 99.125%. Subsequently, in December 2019, Main Street issued an additional $75.0 million aggregate principal amount of the 5.20% Notes at an issue price of 105.0% and, in July 2020, Main Street issued an additional $125.0 million aggregate principal amount at an issue price of 102.674%. The 5.20% Notes issued in December 2019 and July 2020 have identical terms as, and are a part of a single series with, the 5.20% Notes issued in April 2019. The 5.20% Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness; senior to any of its future indebtedness that expressly provides it is subordinated to the 5.20% Notes; effectively subordinated to all of its existing and future secured indebtedness, to the extent of the value of the assets securing such indebtedness, including borrowings under its Credit Facility; and structurally subordinated to all existing and future indebtedness and other obligations of any of its subsidiaries, including without limitation, the indebtedness of the Funds. The 5.20% Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. The 5.20% Notes bear interest at a rate of 5.20% per year payable semiannually on May 1 and November 1 of each year. The total net proceeds from the 5.20% Notes, resulting from the issue price and after net issue price premiums and estimated offering expenses payable, were $451.4 million. Main Street may from time to time repurchase the 5.20% Notes in accordance with the 1940 Act and the rules promulgated thereunder.

The indenture governing the 5.20% Notes (the “5.20% Notes Indenture”) contains certain covenants, including covenants requiring Main Street’s compliance with (regardless of whether Main Street is subject to) the asset coverage requirements set forth in Section 18(a)(1)(A) as modified by Section 61(a)(1) of the 1940 Act, as well as covenants requiring Main Street to provide financial information to the holders of the 5.20% Notes and the trustee if Main Street ceases to be subject to the reporting requirements of the Exchange Act. These covenants are subject to limitations and exceptions that are described in the 5.20% Notes Indenture. As of September 30, 2022, Main Street was in compliance with these covenants.

3.00% Notes due 2026

In January 2021, Main Street issued $300.0 million in aggregate principal amount of 3.00% unsecured notes due July 14, 2026 (the “3.00% Notes”) at an issue price of 99.004%. Subsequently, in October 2021, Main Street issued an additional $200.0 million aggregate principal amount of the 3.00% Notes at an issue price of 101.741%. The 3.00% Notes issued in October 2021 have identical terms as, and are a part of a single series with, the 3.00% Notes issued in January 2021. The 3.00% Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness; senior to any of its future indebtedness that expressly provides it is subordinated to the 3.00% Notes; effectively subordinated to all of its existing and future secured indebtedness, to the extent of the value of the assets securing such indebtedness, including borrowings under its Credit Facility; and structurally subordinated to all existing and future indebtedness and other obligations of any of its subsidiaries, including without limitation, the indebtedness of the Funds. The 3.00% Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. The 3.00% Notes bear interest at a rate of 3.00% per year payable semiannually on January 14 and July 14 of each year. The total net proceeds from the 3.00% Notes, resulting from the issue price and after net issue price premiums and estimated offering expenses payable, were $498.3 million. Main Street may from time to time repurchase the 3.00% Notes in accordance with the 1940 Act and the rules promulgated thereunder.

The indenture governing the 3.00% Notes (the “3.00% Notes Indenture”) contains certain covenants, including covenants requiring Main Street’s compliance with (regardless of whether Main Street is subject to) the asset coverage requirements set forth in Section 18(a)(1)(A) as modified by Section 61(a)(1) of the 1940 Act, as well as covenants requiring Main Street to provide financial information to the holders of the 3.00% Notes and the trustee if Main Street ceases to be subject to the reporting requirements of the Exchange Act. These covenants are subject to limitations and exceptions that are described in the 3.00% Notes Indenture. As of September 30, 2022, Main Street was in compliance with these covenants.

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MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

NOTE F—FINANCIAL HIGHLIGHTS

						Nine Months Ended September 30,
Per Share Data:						2022						2021
NAV at the beginning of the period						$	25.29					$	22.35
Net investment income (1)						2.31						1.92
Net realized gain (1)(2)						0.05						0.15
Net unrealized appreciation (depreciation) (1)(2)						(0.28)						1.71
Income tax provision (1)(2)						(0.24)						(0.33)
Net increase in net assets resulting from operations (1)						1.84						3.45
Dividends paid from net investment income						(2.19)						(1.85)
Distributions from capital gains						—						—
Dividends paid						(2.19)						(1.85)
Accretive effect of stock offerings (issuing shares above NAV per share)						0.98						0.26
Accretive effect of DRIP issuance (issuing shares above NAV per share)						0.08						0.06
Other (3)						(0.06)						0.01
NAV at the end of the period						$	25.94					$	24.27
Market value at the end of the period						$	33.64					$	41.10
Shares outstanding at the end of the period						76,308,830						69,408,645

____________________

(1)Based on weighted-average number of common shares outstanding for the period.

(2)Net realized gains or losses, net unrealized appreciation or depreciation, and income taxes can fluctuate significantly from period to period.

(3)Includes the impact of the different share amounts as a result of calculating certain per share data based on the weighted-average basic shares outstanding during the period and certain per share data based on the shares outstanding as of a period end or transaction date.

			Nine Months Ended September 30,
			2022						2021
			(dollars in thousands)
NAV at end of period			$	1,979,420					$	1,684,307
Average NAV			$	1,876,771					$	1,586,020
Average outstanding debt			$	1,880,100					$	1,264,680
Ratio of total expenses, including income tax expense, to average NAV (1)(2)			5.92		%				6.19		%
Ratio of operating expenses to average NAV (2)(3)			4.99		%				4.76		%
Ratio of operating expenses, excluding interest expense, to average NAV (2)(3)			2.05		%				2.05		%
Ratio of net investment income to average NAV (2)			9.03		%				8.29		%
Portfolio turnover ratio (2)			12.46		%				20.69		%
Total investment return (2)(4)			(20.81)		%				33.57		%
Total return based on change in NAV (2)(5)			7.56		%				15.61		%

____________________

(1)Total expenses are the sum of operating expenses and net income tax provision/benefit. Net income tax provision/benefit includes the accrual of net deferred tax provision/benefit relating to the net unrealized appreciation/depreciation on portfolio investments held in Taxable Subsidiaries and due to the change in the loss carryforwards, which are non-cash in nature and may vary significantly from period to period. Main Street is required to include net

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

deferred tax provision/benefit in calculating its total expenses even though these net deferred taxes are not currently payable/receivable.

(2)Not annualized.

(3)Unless otherwise noted, operating expenses include interest, compensation, general and administrative and share-based compensation expenses, net of expenses allocated to the External Investment Manager of $9.6 million and $7.7 million for the nine months ended September 30, 2022 and 2021, respectively.

(4)Total investment return is based on the purchase of stock at the current market price on the first day and a sale at the current market price on the last day of each period reported on the table and assumes reinvestment of dividends at prices obtained by Main Street’s dividend reinvestment plan during the period. The return does not reflect any sales load that may be paid by an investor.

(5)Total return based on change in net asset value was calculated using the sum of ending net asset value plus dividends to stockholders and other non-operating changes during the period, as divided by the beginning net asset value. Non-operating changes include any items that affect net asset value other than the net increase in net assets resulting from operations, such as the effects of stock offerings, shares issued under the DRIP and equity incentive plans and other miscellaneous items.

NOTE G—DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME

Main Street currently pays regular monthly dividends to its stockholders and periodically pays supplemental dividends to its stockholders. Future dividends, if any, will be determined by its Board of Directors on a quarterly basis. Main Street paid regular monthly dividends of $0.215 per share, totaling $48.1 million, or $0.645 per share, for the three months ended September 30, 2022, and $141.2 million, or $1.94 per share, for the nine months ended September 30, 2022 compared to aggregate regular monthly dividends of $42.3 million, or $0.615 per share, for the three months ended September 30, 2021, and $126.2 million, or $1.85 per share, for the nine months ended September 30, 2021. Main Street also paid a supplemental dividend of $7.6 million, or $0.10 per share, during the three months ended September 30, 2022, and $18.5 million, or $0.25 per share, during the nine months ended September 30, 2022. Main Street did not pay a supplemental dividend during the three or nine months ended September 30, 2021.

MSCC has elected to be treated for U.S. federal income tax purposes as a RIC. MSCC’s taxable income includes the taxable income generated by MSCC and certain of its subsidiaries, including the Funds, which are treated as disregarded entities for tax purposes. As a RIC, MSCC generally will not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that MSCC distributes to its stockholders. MSCC must generally distribute at least 90% of its “investment company taxable income” (which is generally its net ordinary taxable income and realized net short-term capital gains in excess of realized net long-term capital losses) and 90% of its tax-exempt income to maintain its RIC status (pass-through tax treatment for amounts distributed). As part of maintaining RIC status, undistributed taxable income (subject to a 4% non-deductible U.S. federal excise tax) pertaining to a given fiscal year may be distributed up to twelve months subsequent to the end of that fiscal year, provided such dividends are declared on or prior to the later of (i) filing of the U.S. federal income tax return for the applicable fiscal year or (ii) the fifteenth day of the ninth month following the close of the year in which such taxable income was generated.

The determination of the tax attributes for Main Street’s distributions is made annually, based upon its taxable income for the full year and distributions paid for the full year. Therefore, a determination made on an interim basis may not be representative of the actual tax attributes of distributions for a full year. Ordinary dividend distributions from a RIC do not qualify for the 20% maximum tax rate (plus a 3.8% Medicare surtax, if applicable) on dividend income from domestic corporations and qualified foreign corporations, except to the extent that the RIC received the income in the form of qualifying dividends from domestic corporations and qualified foreign corporations. The tax attributes for distributions will generally include both ordinary income and qualified dividends, but may also include either one or both of capital gains and return of capital.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Listed below is a reconciliation of “Net increase in net assets resulting from operations” to taxable income and to total distributions declared to common stockholders for the nine months ended September 30, 2022 and 2021.

			Nine Months Ended September 30,
			2022						2021
			(estimated, dollars in thousands)
Net increase in net assets resulting from operations			$	135,287					$	236,413
Book-tax difference from share-based compensation expense			(3,456)						(5,436)
Net unrealized (appreciation) depreciation			19,922						(117,072)
Income tax provision			17,477						22,691
Pre-tax book income not consolidated for tax purposes			(28,333)						(35,701)
Book income and tax income differences, including debt origination, structuring fees, dividends, realized gains and changes in estimates			24,026						6,027
Estimated taxable income (1)			164,923						106,922
Taxable income earned in prior year and carried forward for distribution in current year			50,834						24,350
Taxable income earned prior to period end and carried forward for distribution next period			(71,128)						(18,959)
Dividend payable as of period end and paid in the following period			16,789						14,553
Total distributions accrued or paid to common stockholders			$	161,418					$	126,866

____________________

(1)Main Street’s taxable income for each period is an estimate and will not be finally determined until the company files its tax return for each year. Therefore, the final taxable income, and the taxable income earned in each period and carried forward for distribution in the following period, may be different than this estimate.

The Taxable Subsidiaries primarily hold certain equity investments for Main Street. The Taxable Subsidiaries permit Main Street to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes and to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The Taxable Subsidiaries are consolidated with Main Street for U.S. GAAP financial reporting purposes, and the portfolio investments held by the Taxable Subsidiaries are included in Main Street’s consolidated financial statements as portfolio investments and recorded at fair value. The Taxable Subsidiaries are not consolidated with MSCC for income tax purposes and may generate income tax expense, or benefit, and tax assets and liabilities, as a result of their ownership of certain portfolio investments. The taxable income, or loss, of the Taxable Subsidiaries may differ from their book income, or loss, due to temporary book and tax timing differences and permanent differences. The Taxable Subsidiaries are each taxed at corporate income tax rates based on their taxable income. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the Taxable Subsidiaries are reflected in Main Street’s consolidated financial statements.

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

The income tax expense (benefit) for Main Street is generally composed of (i) deferred tax expense (benefit), which is primarily the result of the net activity relating to the portfolio investments held in the Taxable Subsidiaries, including changes in loss carryforwards, changes in net unrealized appreciation or depreciation and other temporary book tax differences, and (ii) current tax expense, which is primarily the result of current U.S. federal income and state taxes and excise taxes on Main Street’s estimated undistributed taxable income. The income tax expense, or benefit, and the related tax assets and liabilities generated by the Taxable Subsidiaries, if any, are reflected in Main Street’s Consolidated Statements of Operations. Main Street’s provision for income taxes was comprised of the following for the three and nine months ended September 30, 2022 and 2021 (amounts in thousands):

			Three Months Ended September 30,												Nine Months Ended September 30,
			2022						2021						2022						2021
Current tax expense (benefit):
Federal			$	66					$	(239)					$	182					$	(99)
State			496						1,056						1,110						1,712
Excise			978						136						2,366						629
Total current tax expense			1,540						953						3,658						2,242
Deferred tax expense (benefit):
Federal			125						7,989						10,098						15,284
State			395						3,342						3,721						5,165
Total deferred tax expense			520						11,331						13,819						20,449
Total income tax provision			$	2,060					$	12,284					$	17,477					$	22,691

The net deferred tax liability at September 30, 2022 and December 31, 2021 was $43.5 million and $29.7 million, respectively, with the change primarily related to changes in net unrealized appreciation or depreciation, changes in loss carryforwards, and other temporary book-tax differences relating to portfolio investments held by the Taxable Subsidiaries.

At September 30, 2022, for U.S. federal income tax purposes, the Taxable Subsidiaries had a net operating loss carryforward from prior years which, if unused, will expire in various taxable years from 2034 through 2037. Any net operating losses generated in 2018 and future periods are not subject to expiration and will carryforward indefinitely until utilized. Additionally, the Taxable Subsidiaries have interest expense limitation carryforwards which have an indefinite carryforward period.

NOTE H—COMMON STOCK

Main Street maintains a program with certain selling agents through which it can sell shares of its common stock by means of at-the-market offerings from time to time (the “ATM Program”). During the nine months ended September 30, 2022, Main Street sold 3,429,904 shares of its common stock at a weighted-average price of $40.99 per share and raised $140.6 million of gross proceeds under the ATM Program. Net proceeds were $139.2 million after commissions to the selling agents on shares sold and offering costs. As of September 30, 2022, sales transactions representing 153,023 shares had not settled and are not included in shares issued and outstanding on the face of the Consolidated Balance Sheets but are included in the weighted average shares outstanding in the Consolidated Statements of Operations and in the shares used to calculate the net asset value per share. In March 2022, Main Street entered into new distribution agreements to sell up to 15,000,000 shares through the ATM Program. As of September 30, 2022, 12,440,162 shares remained available for sale under the ATM Program.

During the year ended December 31, 2021, Main Street sold 2,332,795 shares of its common stock at a weighted-average price of $42.71 per share and raised $99.6 million of gross proceeds under the ATM Program. Net proceeds were $98.4 million after commissions to the selling agents on shares sold and offering costs. As of December 31, 2021, sales transactions representing 36,136 shares had not settled and are not included in shares issued

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

and outstanding on the face of the Consolidated Balance Sheets but are included in the weighted average shares outstanding in the Consolidated Statements of Operations and in the shares used to calculate the net asset value per share.

During August 2022, Main Street completed a public equity offering of 1,345,500 shares of common stock at a public offering price of $42.85 per share, including the underwriters’ full exercise of their option to purchase 175,500 additional shares, resulting in total net proceeds, including exercise of the underwriters’ option to purchase additional shares and after deducting underwriting discounts and estimated offering expenses payable by Main Street, of approximately $55.1 million.

NOTE I—DIVIDEND REINVESTMENT PLAN

The dividend reinvestment feature of Main Street’s dividend reinvestment and direct stock purchase plan (the “DRIP”) provides for the reinvestment of dividends on behalf of its stockholders, unless a stockholder has elected to receive dividends in cash. As a result, if Main Street declares a cash dividend, its stockholders who have not “opted out” of the DRIP by the dividend record date will have their cash dividend automatically reinvested into additional shares of MSCC common stock. The share requirements of the DRIP may be satisfied through the issuance of shares of common stock or through open market purchases of common stock by the DRIP plan administrator. Newly issued shares will be valued based upon the final closing price of MSCC’s common stock on the valuation date determined for each dividend by Main Street’s Board of Directors. Shares purchased in the open market to satisfy the DRIP requirements will be valued based upon the average price of the applicable shares purchased, before any associated brokerage or other costs. Main Street’s DRIP is administered by its transfer agent on behalf of Main Street’s record holders and participating brokerage firms. Brokerage firms and other financial intermediaries may decide not to participate in Main Street’s DRIP but may provide a similar dividend reinvestment plan for their clients.

Summarized DRIP information for the nine months ended September 30, 2022 and 2021 is as follows:

			Nine Months Ended September 30,
			2022						2021
			($ in millions)
DRIP participation			$	16.4					$	11.4
Shares issued for DRIP			410,415						293,647

NOTE J—SHARE-BASED COMPENSATION

Main Street accounts for its share-based compensation plans using the fair value method, as prescribed by ASC 718, Compensation—Stock Compensation. Accordingly, for restricted stock awards, Main Street measured the grant date fair value based upon the market price of its common stock on the date of the grant and amortizes the fair value of the awards as share-based compensation expense over the requisite service period, which is generally the vesting term.

Main Street’s Board of Directors approves the issuance of shares of restricted stock to Main Street employees pursuant to the Main Street Capital Corporation 2022 Equity and Incentive Plan (the “Equity and Incentive Plan”). These shares generally vest over a three-year period from the grant date. The fair value is expensed over the service period, starting on the grant date. The following table summarizes the restricted stock issuances approved by Main Street’s Board of Directors under the Equity and Incentive Plan, net of shares forfeited, if any, and the remaining shares of restricted stock available for issuance as of September 30, 2022.

Restricted stock authorized under the plan			5,000,000
Less net restricted stock granted during:
Nine months ended September 30, 2022			(10,256)
Restricted stock available for issuance as of September 30, 2022			4,989,744

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

As of September 30, 2022, the following table summarizes the restricted stock issued to Main Street’s non-employee directors and the remaining shares of restricted stock available for issuance pursuant to the Main Street Capital Corporation 2022 Non-Employee Director Restricted Stock Plan. These shares are granted upon appointment or election to the board and vest on the day immediately preceding the annual meeting of stockholders following the respective grant date and are expensed over such service period.

Restricted stock authorized under the plan			300,000
Less net restricted stock granted during:
Nine months ended September 30, 2022			(4,590)
Restricted stock available for issuance as of September 30, 2022			295,410

For the three months ended September 30, 2022 and 2021, Main Street recognized total share-based compensation expense of $3.6 million and $2.9 million, respectively, related to the restricted stock issued to Main Street employees and non-employee directors. For the nine months ended September 30, 2022 and 2021, Main Street recognized total share-based compensation expense of $10.0 million and $8.0 million, respectively, related to the restricted stock issued to Main Street employees and non-employee directors.

As of September 30, 2022, there was $25.0 million of total unrecognized compensation expense related to Main Street’s non-vested restricted shares. This compensation expense is expected to be recognized over a remaining weighted-average period of 2.4 years as of September 30, 2022.

NOTE K—COMMITMENTS AND CONTINGENCIES

At September 30, 2022, Main Street had the following outstanding commitments (in thousands):

Investments with equity capital commitments that have not yet funded:						Amount
Brightwood Capital Fund Investments
Brightwood Capital Fund V, LP						$	3,000
Brightwood Capital Fund III, LP						300
						3,300
Freeport Fund Investments
Freeport First Lien Loan Fund III LP						4,871
Freeport Financial SBIC Fund LP						3,285
						8,156
Harris Preston Fund Investments
HPEP 4, L.P.						8,104
HPEP 3, L.P.						1,555
HPEP 423 COR, LP						600
2717 HPP-MS, LP						56
						10,315
MS Private Loan Fund I, LP						750
UnionRock Energy Fund II, LP						1,957

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Total Equity Commitments (1)(2)						$	24,478
Investments with commitments to fund revolving loans that have not been fully drawn or term loans with additional commitments not yet funded:
Xenon Arc, Inc.						$	32,400
Dalton US Inc.						19,314
CaseWorthy, Inc.						10,452
HEADLANDS OP-CO LLC						10,125
MS Private Loan Fund I, LP						10,000
PTL US Bidco, Inc						9,542
JTI Electrical & Mechanical, LLC						8,421
AMEREQUIP LLC.						7,704
NinjaTrader, LLC						7,472
Paragon Healthcare, Inc.						6,490
Archer Systems, LLC						6,315
Veregy Consolidated, Inc.						5,875
SI East, LLC						5,250
Watterson Brands, LLC						5,028
Bolder Panther Group, LLC						5,000
Pearl Meyer Topco LLC						5,000
NWN Corporation						4,819
Robbins Bros. Jewelry, Inc.						4,500
South Coast Terminals Holdings, LLC						4,465
AB Centers Acquisition Corporation						4,448
Winter Services LLC						4,444
Adams Publishing Group, LLC						4,335
Bettercloud, Inc.						4,189
MonitorUS Holding, LLC						3,614
Microbe Formulas, LLC						3,601
MB2 Dental Solutions, LLC						3,500
GRT Rubber Technologies LLC						3,350
SPAU Holdings, LLC						3,194
Cody Pools, Inc.						2,950
AVEX Aviation Holdings, LLC						2,880
Batjer TopCo, LLC						2,700
GULF PACIFIC ACQUISITION, LLC						2,525
Infolinks Media Buyco, LLC						2,520
Engineering Research & Consulting, LLC						2,501
Nebraska Vet AcquireCo, LLC						2,500
Mako Steel, LP						2,414
West Star Aviation Acquisition, LLC						2,411
VVS Holdco, LLC						2,400
Centre Technologies Holdings, LLC						2,400
IG Parent Corporation						2,057

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

PPL RVs, Inc.						2,000
The Affiliati Network, LLC						2,000
Evergreen North America Acquisitions, LLC						1,854
ATS Operating, LLC						1,800
Career Team Acquireco LLC						1,800
Johnson Downie Opco, LLC						1,800
Burning Glass Intermediate Holding Company, Inc.						1,704
Chamberlin Holding LLC						1,600
Colonial Electric Company LLC						1,600
Trantech Radiator Topco, LLC						1,600
Roof Opco, LLC						1,556
American Health Staffing Group, Inc.						1,333
RA Outdoors LLC						1,278
Project Eagle Holdings, LLC						1,250
Gamber-Johnson Holdings, LLC						1,200
KMS, LLC						1,086
Channel Partners Intermediateco, LLC						1,032
RTIC Subsidiary Holdings, LLC						890
Hawk Ridge Systems, LLC						815
Acumera, Inc.						801
Mystic Logistics Holdings, LLC						800
Orttech Holdings, LLC						800
Project BarFly, LLC						760
DTE Enterprises, LLC						750
Student Resource Center, LLC						750
Jensen Jewelers of Idaho, LLC						500
Flip Electronics LLC						491
Interface Security Systems, L.L.C						439
ASC Interests, LLC						400
Flame King Holdings, LLC						400
Gulf Publishing Holdings, LLC						400
Wall Street Prep, Inc.						400
Invincible Boat Company, LLC.						353
SIB Holdings, LLC						267
Dynamic Communities, LLC						250
Classic H&G Holdco, LLC						240
Datacom, LLC						227
Acousti Engineering Company of Florida						53
Total Loan Commitments						270,384
Total Commitments						$	294,862

____________________

(1)This table excludes commitments related to six additional Other Portfolio investments for which the investment period has expired and remaining commitments may only be drawn to pay fund expenses. The Company does not

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

expect any material future capital to be called on its commitment to these investments and as a result has excluded those commitments from this table.

(2)This table excludes commitments related to three additional Other Portfolio investments for which the investment period has expired and remaining commitments may only be drawn to pay fund expenses or for follow on investments in existing portfolio companies. The Company does not expect any material future capital to be called on its commitment to these investments to pay fund expenses, and based on representations from the fund manager, the Company does not expect any further capital will be called on its commitment for follow on investments. As a result, the Company has excluded those commitments from this table.

Main Street will fund its unfunded commitments from the same sources it uses to fund its investment commitments that are funded at the time they are made (which are typically through existing cash and cash equivalents and borrowings under the Credit Facility). Main Street follows a process to manage its liquidity and ensure that it has available capital to fund its unfunded commitments as necessary. The Company had no unrealized appreciation or depreciation on the outstanding unfunded commitments as of September 30, 2022.

Main Street has one operating lease for its office space. The lease commenced May 15, 2017 and expires March 31, 2034. It contains two five-year extension options for a final expiration date of March 31, 2044.

In accordance with ASC 842, Main Street has recorded this lease as a right-of-use asset and a lease liability and records lease expense on a straight-line basis.

Total operating lease cost incurred by Main Street for each of the three months ended September 30, 2022 and 2021 was $0.2 million and for each of the nine months ended September 30, 2022 and 2021 was $0.5 million. As of September 30, 2022, the asset related to the operating lease was $3.4 million and is included in the interest receivable and other assets balance on the Consolidated Balance Sheets. The lease liability was $4.0 million and is included in the accounts payable and other liabilities balance on the Consolidated Balance Sheets. As of September 30, 2022, the remaining lease term was 5.3 years and the discount rate was 4.2%.

The following table shows future minimum payments under Main Street’s operating lease as of September 30, 2022 (in thousands):

For the Years Ended December 31,			Amount
2022			$	197
2023			804
2024			818
2025			832
2026			846
Thereafter			933
Total			$	4,430

Main Street may, from time to time, be involved in litigation arising out of its operations in the normal course of business or otherwise. Furthermore, third parties may try to impose liability on Main Street in connection with the activities of its portfolio companies. While the outcome of any current legal proceedings cannot at this time be predicted with certainty, Main Street does not expect any current matters will materially affect its financial condition or results of operations; however, there can be no assurance whether any pending legal proceedings will have a material adverse effect on Main Street’s financial condition or results of operations in any future reporting period.

NOTE L—RELATED PARTY TRANSACTIONS

As discussed further in Note D—External Investment Manager, the External Investment Manager is treated as a wholly-owned portfolio company of Main Street and is included as part of Main Street’s Investment Portfolio. At

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

September 30, 2022, Main Street had a receivable of $6.2 million due from the External Investment Manager, which included (i) $4.6 million related primarily to operating expenses incurred by Main Street as required to support the External Investment Manager’s business and amounts due from the External Investment Manager to Main Street under a tax sharing agreement (see further discussion in Note D—External Investment Manager) and (ii) $1.6 million of dividends declared but not paid by the External Investment Manager. MSCC has entered into an agreement with the External Investment Manager to share employees in connection with its asset management business generally, and specifically for the External Investment Manager’s relationship with MSC Income and its other clients (see further discussion in Note A.1—Organization and Basis of Presentation—Organization and Note D—External Investment Manager).

From time to time, Main Street may make investments in clients of the External Investment Manager in the form of debt or equity capital on terms approved by Main Street’s Board of Directors.

In May 2022, Main Street purchased 94,697 shares of common stock of MSC Income from MSC Income at the price shares were purchased by MSC Income stockholders pursuant to MSC Income’s dividend reinvestment plan for its May dividend on such date. Main Street’s purchase of MSC Income common stock was unanimously approved by the Board of Directors and MSC Income’s board of directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act, of each board. As of September 30, 2022, Main Street owned 94,697 shares of MSC Income. In addition, certain of Main Street’s officers and employees own shares of MSC Income and therefore have direct pecuniary interests in MSC Income.

In December 2020, the External Investment Manager entered into an Investment Management Agreement with the Private Loan Fund to provide investment advisory and management services in exchange for an asset-based fee and certain incentive fees. The Private Loan Fund is a private investment fund exempt from registration under the 1940 Act that co-invests with Main Street in Main Street’s Private Loan investment strategy. In connection with the Private Loan Fund’s initial closing in December 2020, Main Street committed to contribute up to $10.0 million as a limited partner and is entitled to distributions on such interest. In February 2022, Main Street increased its total commitment to the Private Loan Fund from $10.0 million to $15.0 million. In addition, certain of Main Street’s officers and employees (and certain of their immediate family members) have made capital commitments to the Private Loan Fund as limited partners and therefore have direct pecuniary interests in the Private Loan Fund. As of September 30, 2022, Main Street has funded $14.3 million of its limited partner commitment and Main Street’s unfunded commitment was $0.7 million. Main Street’s limited partner commitment to the Private Loan Fund was unanimously approved by the Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act.

Additionally, Main Street provided the Private Loan Fund with a revolving line of credit pursuant to an Unsecured Revolving Promissory Note, dated February 5, 2021 and was subsequently amended on November 30, 2021 and on December 29, 2021 (as amended, the “PL Fund 2021 Note”), in an aggregate amount equal to the amount of limited partner capital commitments to the Private Loan Fund up to $85.0 million. Borrowings under the PL Fund 2021 Note bore interest at a fixed rate of 5.00% per annum and matured on February 28, 2022. The PL Fund 2021 Note was unanimously approved by Main Street’s Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act. In February 2022, the Private Loan Fund fully repaid all borrowings outstanding under the PL Fund 2021 Note and the PL Fund 2021 Note was extinguished.

In March 2022, Main Street provided the Private Loan Fund with a revolving line of credit pursuant to a Secured Revolving Promissory Note, dated March 17, 2022 (the “PL Fund 2022 Note”), which provides for borrowings up to $10.0 million. Borrowings under the PL Fund 2022 Note bear interest at a fixed rate of 5.00% per annum and mature on the date upon which the Private Loan Fund’s investment period concludes, which is scheduled to occur in March 2026. Available borrowings under the PL Fund 2022 Note are subject to a 0.25% non-use fee. The PL Fund 2022 Note was unanimously approved by Main Street’s Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act. As of September 30, 2022, there were no borrowings outstanding under the PL Fund 2022 Note.

In November 2015, Main Street’s Board of Directors approved and adopted the Main Street Capital Corporation Deferred Compensation Plan (the “2015 Deferred Compensation Plan”). The 2015 Deferred Compensation Plan became

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Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

effective on January 1, 2016 and replaced the Deferred Compensation Plan for Non-Employee Directors previously adopted by the Board of Directors in June 2013 (the “2013 Deferred Compensation Plan”). Under the 2015 Deferred Compensation Plan, non-employee directors and certain key employees may defer receipt of some or all of their cash compensation and directors’ fees, subject to certain limitations. Individuals participating in the 2015 Deferred Compensation Plan receive distributions of their respective balances based on predetermined payout schedules or other events as defined by the plan and are also able to direct investments made on their behalf among investment alternatives permitted from time to time under the plan, including phantom Main Street stock units. As of September 30, 2022, $14.0 million of compensation, plus net unrealized gains and losses and investment income, and minus previous distributions, was deferred under the 2015 Deferred Compensation Plan (including amounts previously deferred under the 2013 Deferred Compensation Plan). Of this amount, $5.4 million is deferred into phantom Main Street stock units, representing 161,814 shares of Main Street’s common stock. Any amounts deferred under the plan represented by phantom Main Street stock units will not be issued or included as outstanding on the Consolidated Statements of Changes in Net Assets until such shares are actually distributed to the participant in accordance with the plan, but the related phantom stock units are included in weighted-average shares outstanding with the related dollar amount of the deferral included in total expenses in Main Street’s Consolidated Statements of Operations as the deferred fees represented by such phantom stock units are earned over the service period. The dividend amounts related to additional phantom stock units are included in the Consolidated Statements of Changes in Net Assets as an increase to dividends to stockholders offset by a corresponding increase to additional paid-in capital.

NOTE M—SUBSEQUENT EVENTS

In November 2022, Main Street declared a supplemental cash dividend of $0.10 per share payable in December 2022. This supplemental cash dividend is in addition to the previously announced regular monthly cash dividends that Main Street declared for the fourth quarter of 2022 of $0.22 per share for each of October, November and December 2022.

In November 2022, Main Street declared regular monthly dividends of $0.225 per share for each month of January, February and March of 2023. These regular monthly dividends equal a total of $0.675 per share for the first quarter of 2023, representing a 4.7% increase from the regular monthly dividends paid in the first quarter of 2022. Including the regular monthly and supplemental dividends declared for the fourth quarter of 2022 and first quarter of 2023, Main Street will have paid $35.795 per share in cumulative dividends since its October 2007 initial public offering.

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates

September 30, 2022

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1) (10) (11)			Geography			Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2021 Fair Value (13)						Gross Additions(3)						Gross Reductions(4)						September 30, 2022 Fair Value (13)
Majority-owned investments
ASK (Analytical Systems Keco Holdings, LLC)						L+			10.00%						Secured Debt			(8)			$	—					$	—					$	4					$	(4)					$	1					$	—					$	(3)
			12.63%			L+			10.00%						Secured Debt			(8)			—						—						506						4,740						65						210						4,595
			12.63%												Preferred Member Units			(8)			—						—						—						—						—						—						—
															Preferred Member Units			(8)			—						(1,050)						—						4,894						—						1,050						3,844
															Warrants			(8)			—						—						—						—						—						—						—
Brewer Crane Holdings, LLC			12.56%			L+			10.00%						Secured Debt			(9)			—						—						649						8,037						19						1,972						6,084
															Preferred Member Units			(9)			—						(2,040)						795						7,710						—						2,040						5,670
Café Brazil, LLC															Member Units			(8)			—						(200)						178						2,570						—						200						2,370
California Splendor Holdings LLC			12.38%			L+			10.00%						Secured Debt			(9)			—						52						2,467						27,915						85						—						28,000
															Preferred Member Units			(9)			—						7,750						188						13,275						7,750						—						21,025
			15.00%									15.00%			Preferred Member Units			(9)			—						—						792						9,510						792						6,449						3,853
Clad-Rex Steel, LLC			12.13%			L+			9.50%						Secured Debt			(5)			—						—						898						10,401						29						—						10,430
			10.00%												Secured Debt			(5)			—						—						81						1,071						—						24						1,047
															Member Units			(5)			—						(760)						595						10,250						—						760						9,490
															Member Units			(5)			—						80						—						530						80						—						610
CMS Minerals Investments															Member Units			(9)			—						331						150						1,974						331						415						1,890
Cody Pools, Inc.						L+			10.50%						Secured Debt			(8)			—						—						84						(13)						2,866						2,864						(11)
			13.63%			L+			10.50%						Secured Debt			(8)			—						(66)						4,044						42,497						66						1,338						41,225
															Preferred Member Units			(8)			—						9,570						3,710						47,640						9,570						—						57,210
CompareNetworks Topco, LLC						L+			9.00%						Secured Debt			(9)			—						—						—						—						—						—						—
			11.63%			L+			9.00%						Secured Debt			(9)			—						(13)						468						6,477						13						1,140						5,350
															Preferred Member Units			(9)			—						6,570						474						12,000						6,570						—						18,570
Datacom, LLC			7.50%												Secured Debt			(8)			—						—						—						—						223						—						223
			7.50%												Secured Debt			(8)			—						160						624						7,668						284						203						7,749
															Preferred Member Units			(8)			—						60						72						2,610						60						—						2,670
Direct Marketing Solutions, Inc.			13.63%			L+			11.00%						Secured Debt			(9)			—						14						102						(22)						4,272						850						3,400
			13.63%			L+			11.00%						Secured Debt			(9)			—						(53)						2,322						24,070						53						1,073						23,050
															Preferred Stock			(9)			—						3,870						1,029						18,350						3,870						—						22,220
Gamber-Johnson Holdings, LLC			10.63%			L+			8.00%						Secured Debt			(5)			—						—						5						—						—						—						—
			10.63%			L+			8.00%						Secured Debt			(5)			—						(4)						1,722						21,598						2,484						4						24,078
															Member Units			(5)			—						(3,230)						715						49,700						—						3,230						46,470
GRT Rubber Technologies LLC			10.56%			L+			8.00%						Secured Debt			(8)			—						(21)						2,756						38,885						1,629						21						40,493
															Member Units			(8)			—						—						2,483						46,190						—						—						46,190
Jensen Jewelers of Idaho, LLC			12.25%			P+			6.75%						Secured Debt			(9)			—						(6)						207						2,550						6						106						2,450
															Member Units			(9)			—						2,550						1,996						12,420						2,550						—						14,970
Kickhaefer Manufacturing Company, LLC			11.50%												Secured Debt			(5)			—						—						1,818						20,324						37						—						20,361
			9.00%												Secured Debt			(5)			—						—						265						3,876						1						26						3,851
															Member Units			(5)			—						(3,060)						—						12,310						—						3,060						9,250
															Member Units			(5)			—						—						84						2,460						—						—						2,460
Market Force Information, LLC			13.38%			L+			11.00%						Secured Debt			(9)			—						—						374						3,400						1,600						—						5,000
			12.00%									12.00%			Secured Debt			(9)			—						(6,065)						—						8,936						—						6,065						2,871

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2022

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1) (10) (11)			Geography			Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2021 Fair Value (13)						Gross Additions(3)						Gross Reductions(4)						September 30, 2022 Fair Value (13)
															Member Units			(9)			—						—						—						—						—						—						—
MH Corbin Holding LLC			13.00%												Secured Debt			(5)			—						(1,220)						795						5,934						9						3,234						2,709
															Preferred Member Units			(5)			—						—						—						—						—						—						—
															Preferred Member Units			(5)			—						—						—						—						—						—						—
MSC Adviser I, LLC															Member Units			(8)			—						(27,910)						5,620						140,400						—						27,910						112,490
Mystic Logistics Holdings, LLC			10.00%												Secured Debt			(6)			—						—						3						—						—						—						—
			10.00%												Secured Debt			(6)			—						(1)						460						6,378						1						633						5,746
															Common Stock			(6)			—						11,860						2,860						8,840						11,860						—						20,700
OMi Topco, LLC			12.00%												Secured Debt			(8)			—						(41)						1,625						18,000						41						1,791						16,250
															Preferred Member Units			(8)			—						470						1,676						20,210						470						—						20,680
PPL RVs, Inc.						L+			7.00%						Secured Debt			(8)			—						—						79						727						1,264						2,000						(9)
			8.75%			L+			7.00%						Secured Debt			(8)			—						239						1,155						11,655						8,000						—						19,655
															Common Stock			(8)			—						5,150						908						14,360						5,150						—						19,510
															Common Stock			(8)			—						—						—						—						157						—						157
Principle Environmental, LLC															Secured Debt			(8)			—						—						104						1,465						9						1,474						—
			13.00%												Secured Debt			(8)			—						—						602						5,808						18						26						5,800
															Preferred Member Units			(8)			—						1,070						656						11,160						1,070						—						12,230
															Common Stock			(8)			—						80						—						710						80						—						790
Quality Lease Service, LLC															Member Units			(7)			—						76						—						2,148						76						1,599						625
Robbins Bros. Jewelry, Inc.			13.63%			L+			11.00%						Secured Debt			(9)			—						—						24						(44)						6						—						(38)
			13.63%			L+			11.00%						Secured Debt			(9)			—						—						3,465						36,000						59						450						35,609
															Preferred Equity			(9)			—						4,140						558						11,070						4,140						—						15,210
Trantech Radiator Topco, LLC			8.00%												Secured Debt			(7)			—						—						5						(8)						3						—						(5)
			12.00%												Secured Debt			(7)			—						(17)						785						8,720						17						417						8,320
															Common Stock			(7)			—						(1,240)						87						8,660						—						1,240						7,420
Ziegler’s NYPD, LLC			12.00%												Secured Debt			(8)			—						—						57						625						—						175						450
			6.50%												Secured Debt			(8)			—						—						49						1,000						—						—						1,000
			14.00%												Secured Debt			(8)			—						(74)						292						2,750						—						74						2,676
															Preferred Member Units			(8)			—						(940)						—						2,130						—						940						1,190
															Warrants			(8)			—						—						—						—						—						—						—
Other controlled investments
2717 MH, L.P.															LP Interests (2717 MH, L.P.)			(8)			—						1,979						—						3,971						3,171						—						7,142
															LP Interests (2717 HPP-MS, L.P.)			(8)			—						—						—						—						244						—						244
ASC Interests, LLC			13.00%												Secured Debt			(8)			—						—						24						200						130						30						300
			13.00%												Secured Debt			(8)			—						—						211						1,636						12						—						1,648
															Member Units			(8)			—						80						—						720						80						—						800
ATS Workholding, LLC			5.00%												Secured Debt			(9)			—						(411)						—						1,088						147						435						800
			5.00%												Secured Debt			(9)			—						(576)						—						1,917						—						619						1,298
															Preferred Member Units			(9)			—						—						—						—						—						—						—
Barfly Ventures, LLC			7.00%												Secured Debt			(5)			—						—						38						710						1						—						711
															Member Units			(5)			—						1,390						—						1,930						1,390						—						3,320
Batjer TopCo, LLC															Secured Debt			(8)			—						—						4						—						451						459						(8)

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2022

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1) (10) (11)			Geography			Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2021 Fair Value (13)						Gross Additions(3)						Gross Reductions(4)						September 30, 2022 Fair Value (13)
			11.00%												Secured Debt			(8)			—						—						—						—						—						—						—
			11.00%												Secured Debt			(8)			—						—						824						—						10,927						—						10,927
															Preferred Stock			(8)			—						—						—						—						4,095						—						4,095
Bolder Panther Group, LLC						L+			8.00%						Secured Debt			(9)			—						—						19						—						—						—						—
			12.63%			L+			10.00%						Secured Debt			(9)			—						266						5,780						39,000						60,194						—						99,194
			8.00%												Class B Preferred Member Units			(9)			—						3,840						558						23,170						3,840						—						27,010
Bridge Capital Solutions Corporation			13.00%												Secured Debt			(6)			—						—						869						8,813						—						—						8,813
			13.00%												Secured Debt			(6)			—						—						99						1,000						—						—						1,000
															Preferred Member Units			(6)			—						—						75						1,000						—						—						1,000
															Warrants			(6)			—						83						—						1,712						83						—						1,795
															Warrants			(6)			—						117						—						2,348						117						—						2,465
CBT Nuggets, LLC															Member Units			(9)			—						(2,370)						2,471						50,620						—						2,370						48,250
Centre Technologies Holdings, LLC						L+			9.00%						Secured Debt			(8)			—						—						25						—						1,440						1,440						—
			11.63%			L+			9.00%						Secured Debt			(8)			—						507						1,271						8,864						6,470						387						14,947
															Preferred Member Units			(8)			—						2,038						90						5,840						2,320						—						8,160
Chamberlin Holding LLC			8.63%			L+			6.00%						Secured Debt			(8)			—						—						6						—						—						—						—
			10.63%			L+			8.00%						Secured Debt			(8)			—						(51)						1,314						17,817						51						402						17,466
															Member Units			(8)			—						(1,810)						1,335						24,140						—						1,810						22,330
															Member Units			(8)			—						—						55						1,540						451						—						1,991
Charps, LLC			10.00%												Unsecured Debt			(5)			—						(36)						461						5,694						36						36						5,694
															Preferred Member Units			(5)			—						(780)						425						13,990						—						780						13,210
Colonial Electric Company LLC															Secured Debt			(6)			—						—						46						—						1,600						1,600						—
			12.00%												Secured Debt			(6)			—						—						2,224						24,351						45						945						23,451
															Preferred Member Units			(6)			—						80						1,287						9,130						80						—						9,210
Copper Trail Energy Fund I, LP - CTMH															LP Interests (CTMH, LP)			(9)			—						—						—						710						—						—						710
Digital Products Holdings LLC			12.63%			L+			10.00%						Secured Debt			(5)			—						—						1,436						16,801						33						990						15,844
															Preferred Member Units			(5)			—						—						150						9,835						—						—						9,835
Flame King Holdings, LLC			9.25%			L+			6.50%						Secured Debt			(9)			—						64						464						6,324						1,276						—						7,600
			13.75%			L+			11.00%						Secured Debt			(9)			—						173						2,035						20,996						204						—						21,200
															Preferred Equity			(9)			—						3,440						909						10,400						3,440						—						13,840
Garreco, LLC			9.50%			L+			8.00%						Secured Debt			(8)			—						—						290						4,196						—						370						3,826
															Member Units			(8)			—						(280)						321						2,270						—						280						1,990
Gulf Manufacturing, LLC															Member Units			(8)			—						170						1,365						5,640						170						—						5,810
Gulf Publishing Holdings, LLC						L+			9.50%						Secured Debt			(8)			—						—						7						257						—						257						—
															Secured Debt			(8)			(5,822)						3,848						503						9,717						—						9,717						—
			12.50%												Secured Debt			(8)			—						(116)						—						—						2,400						116						2,284
															Member Units			(8)			—						—						—						—						—						—						—
															Member Units			(8)			—						(1,680)						—						—						5,600						1,680						3,920
Harrison Hydra-Gen, Ltd.															Common Stock			(8)			—						(250)						—						3,530						—						250						3,280
Johnson Downie Opco, LLC			14.13%			L+			11.50%						Secured Debt			(8)			—						—						10						(18)						3						—						(15)
			14.13%			L+			11.50%						Secured Debt			(8)			—						84						1,109						11,362						114						1,477						9,999
															Preferred Equity			(8)			—						2,730						808						3,150						2,730						—						5,880
JorVet Holdings, LLC			12.00%												Secured Debt			(9)			—						—						1,881						—						25,419						—						25,419

102

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Table of contents                                 Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2022

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1) (10) (11)			Geography			Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2021 Fair Value (13)						Gross Additions(3)						Gross Reductions(4)						September 30, 2022 Fair Value (13)
															Common Stock			(9)			—						—						468						—						10,741						—						10,741
KBK Industries, LLC															Member Units			(5)			—						770						1,007						13,620						770						—						14,390
MS Private Loan Fund															LP Interests			(8)			—						20						437						2,581						11,770						—						14,351
MSC Income Fund, Inc.															Common Equity			(8)			—						11						15						—						761						—						761
NAPCO Precast, LLC															Member Units			(8)			—						(2,380)						4						13,560						—						2,380						11,180
Nebraska Vet AcquireCo, LLC (NVS)			8.71%			L+			7.00%						Secured Debt			(5)			—						—						7						—						—						—						—
			12.00%												Secured Debt			(5)			—						121						1,146						4,829						13,452						—						18,281
			12.00%												Secured Debt			(5)			—						71						972						10,412						88						—						10,500
															Preferred Member Units			(5)			—						—						—						7,700						—						—						7,700
NexRev LLC			11.00%												Secured Debt			(8)			—						—						26						800						—						640						160
			11.00%												Secured Debt			(8)			—						(928)						1,560						13,245						—						4,192						9,053
															Preferred Member Units			(8)			—						(2,913)						60						2,690						1,333						2,913						1,110
NRP Jones, LLC			12.00%												Secured Debt			(5)			—						—						189						2,080						—						—						2,080
															Member Units			(5)			—						(1,585)						449						6,200						—						1,585						4,615
															Member Units			(5)			—						(65)						13						240						—						65						175
NuStep, LLC			9.13%			L+			6.50%						Secured Debt			(5)			—						—						208						1,720						2,679						—						4,399
			12.00%												Secured Debt			(5)			—						(4)						1,612						17,240						1,175						4						18,411
															Preferred Member Units			(5)			—						(3,300)						—						13,500						—						3,300						10,200
Orttech Holdings, LLC						L+			11.00%						Secured Debt			(5)			—						—						16						175						—						175						—
			13.63%			L+			11.00%						Secured Debt			(5)			—						—						2,305						23,976						41						600						23,417
															Preferred Stock			(5)			—						—						579						10,000						—						—						10,000
Pearl Meyer Topco LLC															Secured Debt			(6)			—						—						24						—						1,500						1,500						—
			12.00%												Secured Debt			(6)			—						—						—						—						—						—						—
			12.00%												Secured Debt			(6)			—						(76)						2,819						32,674						76						4,069						28,681
															Member Units			(6)			—						14,850						5,754						26,970						14,850						—						41,820
River Aggregates, LLC															Member Units			(8)			—						180						—						3,280						180						—						3,460
Tedder Industries, LLC			12.00%												Secured Debt			(9)			—						—						158						1,040						800						—						1,840
			12.00%												Secured Debt			(9)			—						(71)						1,431						15,141						47						71						15,117
															Preferred Member Units			(9)			—						(1,933)						—						8,579						488						1,930						7,137
Televerde, LLC															Member Units			(8)			—						(2,076)						—						7,280						—						2,076						5,204
															Preferred Stock			(8)			—						1,076						—						—						1,794						—						1,794
Vision Interests, Inc.															Series A Preferred Stock			(9)			—						—						144						3,000						—						—						3,000
VVS Holdco LLC			8.63%			L+			6.00%						Secured Debt			(5)			—						—						45						1,169						805						1,201						773
			11.50%												Secured Debt			(5)			—						—						2,697						30,100						46						—						30,146
															Preferred Equity			(5)			—						240						300						11,840						238						—						12,078
																					—						—						—						—						—						—						—
																					—						—						—						—						—						—						—
Other																					—						—						—						—						—						—						—
Amounts related to investments transferred from other 1940 Act classification during the period																					—						—						985						41,748						—						—						—
Total Control investments																					$	(5,822)					$	20,618					$	110,751					$	1,489,257					$	280,134					$	128,214					$	1,599,429
Affiliate Investments
AAC Holdings, Inc.			18.00%									18.00%			Secured Debt			(7)			$	—					$	143					$	1,492					$	9,794					$	1,182					$	—					$	10,976
															Common Stock			(7)			—						(2,004)						—						2,079						—						2,004						75

103

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Table of contents                                 Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2022

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1) (10) (11)			Geography			Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2021 Fair Value (13)						Gross Additions(3)						Gross Reductions(4)						September 30, 2022 Fair Value (13)
															Warrants			(7)			—						(1,865)						—						1,940						—						1,865						75
AFG Capital Group, LLC															Preferred Member Units			(8)			—						—						2						144						—						144						—
															Preferred Member Units			(8)			—						1,040						200						7,740						1,040						—						8,780
ATX Networks Corp.			11.14%			L+			7.50%						Secured Debt			(6)			—						403						562						7,092						631						1,016						6,707
			10.00%									10.00%			Unsecured Debt			(6)			—						260						242						1,963						502						—						2,465
															Common Stock			(6)			—						—						—						—						—						—						—
BBB Tank Services, LLC			13.56%			L+			11.00%						Unsecured Debt			(8)			—						—						75						800						—						—						800
			13.56%			L+			11.00%						Unsecured Debt			(8)			—						(209)						377						1,707						—						209						1,498
															Member Units			(8)			—						—						—						—						—						—						—
			15.00%									15.00%			Preferred Stock (non-voting)			(8)			—						—						—						—						—						—						—
Boccella Precast Products LLC			10.00%												Secured Debt			(6)			—						—						24						320						—						—						320
															Member Units			(6)			—						(1,510)						73						4,830						—						1,510						3,320
Buca C, LLC			9.00%												Secured Debt			(7)			—						1,604						1,488						14,370						1,602						1,966						14,006
			6.00%									6.00%			Preferred Member Units			(7)			—						—						—						—						—						—						—
Career Team Holdings, LLC			8.63%			L+			6.00%						Secured Debt			(6)			—						—						5						—						—						—						—
			12.50%												Secured Debt			(6)			—						—						1,950						20,050						30						—						20,080
															Common Stock			(6)			—						—						—						4,500						—						—						4,500
Chandler Signs Holdings, LLC															Class A Units			(8)			—						510						—						460						510						—						970
Classic H&G Holdings, LLC			8.38%			L+			6.00%						Secured Debt			(6)			—						—						455						4,000						11,720						7,960						7,760
			8.00%												Secured Debt			(6)			—						(32)						1,201						19,274						32						32						19,274
															Preferred Member Units			(6)			—						8,530						1,294						15,260						8,530						—						23,790
Congruent Credit Opportunities Funds															LP Interests (Congruent Credit Opportunities Fund   III, LP)			(8)			—						(63)						427						9,959						—						2,105						7,854
DMA Industries, LLC			12.00%												Secured Debt			(7)			—						175						1,961						20,993						207						—						21,200
															Preferred Equity			(7)			—						1,316						—						5,944						1,316						—						7,260
Dos Rios Partners															LP Interests (Dos Rios Partners - A, LP)			(8)			—						(1,147)						—						10,329						—						1,147						9,182
															LP Interests (Dos Rios Partners, LP)			(8)			—						(364)						—						3,280						—						364						2,916
Dos Rios Stone Products LLC															Class A Preferred Units			(8)			—						(290)						—						640						—						290						350
EIG Fund Investments															LP Interests (EIG Global Private Debt Fund-A, L.P.)			(8)			11						—						46						547						1,093						170						1,470
Freeport Financial SBIC Fund LP															LP Interests (Freeport Financial SBIC Fund LP)			(5)			—						(52)						2						6,078						—						1,962						4,116
															LP Interests (Freeport First Lien Loan Fund III LP)			(5)			—						(57)						309						7,231						—						1,056						6,175
GFG Group, LLC.			9.00%												Secured Debt			(5)			—						(25)						969						12,545						25						825						11,745
															Preferred Member Units			(5)			—						150						417						6,990						150						—						7,140
Hawk Ridge Systems, LLC			8.38%			L+			6.00%						Secured Debt			(9)			—						—						150						2,585						597						—						3,182
			8.00%												Secured Debt			(9)			—						(4)						2,145						34,800						3,004						4						37,800
															Preferred Member Units			(9)			—						4,400						803						14,680						4,400						—						19,080

104

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Table of contents                                 Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2022

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1) (10) (11)			Geography			Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2021 Fair Value (13)						Gross Additions(3)						Gross Reductions(4)						September 30, 2022 Fair Value (13)
															Preferred Member Units			(9)			—						230						—						770						230						—						1,000
Houston Plating and Coatings, LLC			8.00%												Unsecured Convertible Debt			(8)			—						(210)						182						2,960						—						210						2,750
															Member Units			(8)			—						(990)						17						3,210						—						990						2,220
HPEP 3, L.P.															LP Interests (HPEP 3, L.P.)			(8)			779						254						(80)						4,712						1,033						1,414						4,331
															LP Interests (HPEP 4, L.P.)			(8)			—						—						—						—						1,896						—						1,896
															LP Interests (423 COR, LP)			(8)			—						—						—						—						1,400						—						1,400
I-45 SLF LLC															Member Units (Fully diluted 20.0%; 21.75% profits   interest)			(8)			—						(1,880)						1,499						14,387						—						1,880						12,507
Iron-Main Investments, LLC			12.50%												Secured Debt			(5)			—						—						443						4,557						7						—						4,564
			12.50%												Secured Debt			(5)			—						—						308						3,170						4						—						3,174
			12.50%												Secured Debt			(5)			—						—						848						8,944						—						—						8,944
			12.50%												Secured Debt			(5)			—						—						1,926						19,805						30						—						19,835
															Common Stock			(5)			—						—						—						1,798						—						—						1,798
L.F. Manufacturing Holdings, LLC															Preferred Member Units (non-voting)			(8)			—						—						9						107						10						117						—
															Member Units			(8)			617						(541)						224						2,560						617						3,177						—
OnAsset Intelligence, Inc.			12.00%									12.00%			Secured Debt			(8)			—						(273)						28						935						28						273						690
			12.00%									12.00%			Secured Debt			(8)			—						(280)						29						954						29						280						703
			12.00%									12.00%			Secured Debt			(8)			—						(602)						62						2,055						62						602						1,515
			12.00%									12.00%			Secured Debt			(8)			—						(1,255)						129						4,285						130						1,255						3,160
			10.00%									10.00%			Unsecured Debt			(8)			—						—						5						192						5						—						197
			7.00%									7.00%			Preferred Stock			(8)			—						—						—						—						—						—						—
															Common Stock			(8)			—						—						—						—						—						—						—
															Warrants			(8)			—						—						—						—						—						—						—
Oneliance, LLC			13.56%			L+			11.00%						Secured Debt			(7)			—						—						—						—						—						—						—
			13.56%			L+			11.00%						Secured Debt			(7)			—						—						536						5,547						9						—						5,556
															Preferred Stock			(7)			—						—						—						1,056						—						—						1,056
Rocaceia, LLC (Quality Lease and Rental Holdings, LLC)			12.00%												Secured Debt			(8)			(67)						—						—						—						—						—						—
															Preferred Member Units			(8)			—						—						—						—						—						—						—
SI East, LLC (Stavig)			10.25%												Secured Debt			(7)			—						—						195						2,250						3,750						3,750						2,250
			10.25%												Secured Debt			(7)			—						—						6,068						63,600						31,125						1,489						93,236
															Preferred Member Units			(7)			—						3,380						568						11,570						3,380						—						14,950
Slick Innovations, LLC			11.00%												Secured Debt			(6)			—						(41)						481						5,320						41						1,121						4,240
															Common Stock			(6)			—						130						—						1,510						130						—						1,640
															Warrants			(6)			—						40						—						400						40						—						440
Sonic Systems International, LLC			9.75%			L+			7.50%						Secured Debt			(8)			—						102						966						11,757						3,856						—						15,613
															Common Stock			(8)			—						64						32						1,070						350						—						1,420
Superior Rigging & Erecting Co.			12.00%												Secured Debt			(7)			—						—						1,991						21,332						35						—						21,367
															Preferred Member Units			(7)			—						—						—						4,500						—						—						4,500

105

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Table of contents                                 Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2022

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1) (10) (11)			Geography			Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2021 Fair Value (13)						Gross Additions(3)						Gross Reductions(4)						September 30, 2022 Fair Value (13)
The Affiliati Network, LLC															Secured Debt			(9)			—						—						28						262						3,523						3,800						(15)
			13.00%												Secured Debt			(9)			—						—						1,166						12,834						35						1,720						11,149
															Preferred Stock			(9)			—						—						339						6,400						—						—						6,400
UnionRock Energy Fund II, LP															LP Interests			(9)			—						(64)						194						6,123						1,880						2,649						5,354
UniTek Global Services, Inc.			10.76%			SF+			5.50%			2.00%			Secured Debt			(6)			—						3						29						371						9						—						380
			10.76%			SF+			5.50%			2.00%			Secured Debt			(6)			—						26						146						1,852						61						212						1,701
			15.00%									15.00%			Secured Convertible Debt			(6)			—						782						167						2,375						1,896						—						4,271
			20.00%									20.00%			Preferred Stock			(6)			—						(280)						280						2,832						281						280						2,833
			20.00%									20.00%			Preferred Stock			(6)			—						153						—						1,498						153						—						1,651
			19.00%									19.00%			Preferred Stock			(6)			—						—						—						—						—						—						—
			13.50%									13.50%			Preferred Stock			(6)			—						—						—						—						—						—						—
															Common Stock			(6)			—						—						—						—						—						—						—
Volusion, LLC			11.50%												Secured Debt			(8)			—						(104)						1,490						17,434						—						804						16,630
			8.00%												Unsecured Convertible Debt			(8)			—						—						24						409						—						—						409
															Preferred Member Units			(8)			—						(5,989)						—						5,990						—						5,990						—
															Warrants			(8)			—						—						—						—						—						—						—
Other																					—						—						—						—						—						—						—
Amounts related to investments transferred from other 1940 Act classification during the period																					—						139						1,302						32,597						—						—						—
Total Affiliate investments																					$	1,340					$	3,703					$	38,300					$	549,214					$	92,606					$	56,642					$	552,581

____________________

(1)The principal amount, the ownership detail for equity investments and if the investment is income producing is included in the Consolidated Schedule of Investments included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q.

(2)Represents the total amount of interest, fees and dividends credited to income for the portion of the period for which an investment was included in Control or Affiliate categories, respectively. For investments transferred between Control and Affiliate categories during the period, any income or investment balances related to the time period it was in the category other than the one shown at period end is included in “Amounts related to investments transferred from other 1940 Act classifications during the period.”

(3)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, follow-on investments and accrued PIK interest, and the exchange of one or more existing securities for one or more new securities. Gross additions also include net increases in unrealized appreciation or net decreases in net unrealized depreciation as well as the movement of an existing portfolio company into this category and out of a different category.

(4)Gross reductions include decreases in the cost basis of investments resulting from principal repayments or sales and the exchange of one or more existing securities for one or more new securities. Gross reductions also include net increases in net unrealized depreciation or net decreases in unrealized appreciation as well as the movement of an existing portfolio company out of this category and into a different category.

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Table of contents                                 Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2022

(dollars in thousands)

(unaudited)

(5)Portfolio company located in the Midwest region as determined by location of the corporate headquarters. The fair value as of September 30, 2022 for control investments located in this region was $346,535. This represented 21.7% of net assets as of September 30, 2022. The fair value as of September 30, 2022 for affiliate investments located in this region was $67,491. This represented 12.2% of net assets as of September 30, 2022.

(6)Portfolio company located in the Northeast region and Canada as determined by location of the corporate headquarters. The fair value as of September 30, 2022 for control investments located in this region was $144,681. This represented 9.0% of net assets as of September 30, 2022. The fair value as of September 30, 2022 for affiliate investments located in this region was $105,372. This represented 19.1% of net assets as of September 30, 2022.

(7)Portfolio company located in the Southeast region as determined by location of the corporate headquarters. The fair value as of September 30, 2022 for control investments located in this region was $16,360. This represented 1.0% of net assets as of September 30, 2022. The fair value as of September 30, 2022 for affiliate investments located in this region was $196,507. This represented 35.6% of net assets as of September 30, 2022.

(8)Portfolio company located in the Southwest region as determined by location of the corporate headquarters. The fair value as of September 30, 2022 for control investments located in this region was $593,513. This represented 37.1% of net assets as of September 30, 2022. The fair value as of September 30, 2022 for affiliate investments located in this region was $99,261. This represented 18.0% of net assets as of September 30, 2022.

(9)Portfolio company located in the West region as determined by location of the corporate headquarters. The fair value as of September 30, 2022 for control investments located in this region was $498,340. This represented 31.2% of net assets as of September 30, 2022. The fair value as of September 30, 2022 for affiliate investments located in this region was $83,950. This represented 15.2% of net assets as of September 30, 2022.

(10)All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities,” unless otherwise noted.

(11)This schedule should be read in conjunction with the Consolidated Schedule of Investments and Notes to the Consolidated Financial Statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. Supplemental information can be located within the Consolidated Schedule of Investments including end of period interest rate, preferred dividend rate, maturity date, investments not paid currently in cash and investments whose value was determined using significant unobservable inputs.

(12)Investment has an unfunded commitment as of September 30, 2022 (see Note K). The fair value of the investment includes the impact of the fair value of any unfunded commitments.

(13)Negative fair value is the result of the capitalized discount being greater than the principal amount outstanding on the loan.

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates

September 30, 2021

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1)(10)(11)						Geography						Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2020 Fair Value						Gross Additions(3)						Gross Reductions(4)						September 30, 2021 Fair Value
Majority-owned investments
ASK (Analytical Systems Keco Holdings, LLC)															Preferred Member Units						(8)						$	—					$	(3,200)					$	—					$	3,200					$	—					$	3,200					$	—
															Preferred Member Units						(8)						—						2,356						—						—						4,783						—						4,783
															Warrants						(8)						—						(10)						—						10						—						10						—
			12.00%			L+			10.00%						Secured Debt						(8)						—						—						520						4,873						134						220						4,787
Café Brazil, LLC															Member Units						(8)						—						540						470						2,030						540						—						2,570
California Splendor Holdings LLC															Preferred Member Units						(9)						—						4,564						188						6,241						4,564						—						10,805
			11.00%			L+			10.00%						Secured Debt						(9)						—						36						2,579						35,832						196						8,129						27,899
			15.00%									15.00%			Preferred Member Units						(9)						—						—						939						8,255						939						—						9,194
Clad-Rex Steel, LLC															Member Units						(5)						—						—						—						530						—						—						530
															Member Units						(5)						—						1,640						2,181						8,610						1,640						—						10,250
			10.00%												Secured Debt						(5)						—						—						83						1,100						—						22						1,078
			10.50%			L+			9.50%						Secured Debt						(5)						—						—						878						10,853						—						460						10,393
CMS Minerals Investments															Member Units						(9)						—						453						22						1,624						454						195						1,883
Cody Pools, Inc.															Preferred Member Units						(8)						—						15,450						1,602						14,940						15,450						—						30,390
			12.25%			L+			10.50%						Secured Debt						(8)						—						6						1,400						14,216						8,000						4,169						18,047
Datacom, LLC			8.00%												Secured Debt						(8)						(1,800)						185						—						1,615						185						1,800						—
															Preferred Member Units						(8)						(1,294)						1,294						—						—						1,294						1,294						—
															Preferred Member Units						(8)						(6,030)						6,030						—						—						6,030						6,030						—
			10.50%									10.50%			Secured Debt						(8)						(1,801)						1,945						1						10,531						1,945						12,476						—
															Preferred Member Units						(8)						—						—						—						—						2,610						—						2,610
			5.00%												Secured Debt						(8)						—						—						564						—						8,288						81						8,207
Direct Marketing Solutions, Inc.															Preferred Stock						(9)						—						(2,230)						672						19,380						—						2,230						17,150
			12.00%			L+			11.00%						Secured Debt						(9)						—						—						1,401						15,006						28						235						14,799
Gamber-Johnson Holdings, LLC															Member Units						(5)						—						32						3,744						52,490						2,880						—						55,370
			9.00%			L+			7.00%						Secured Debt						(5)						—						(31)						1,435						19,838						830						30						20,638
GRT Rubber Technologies LLC															Member Units						(8)						—						—						3,636						44,900						—						—						44,900
			7.10%			L+			7.00%						Secured Debt						(8)						—						—						904						16,775						—						—						16,775
Jensen Jewelers of Idaho, LLC															Member Units						(9)						—						3,640						1,264						7,620						3,640						—						11,260
			10.00%			P+			6.75%						Secured Debt						(9)						—						(10)						244						3,400						10						660						2,750
Kickhaefer Manufacturing Company, LLC															Member Units						(5)						—						50						75						1,160						50						—						1,210
															Member Units						(5)						—						—						—						12,240						—						—						12,240
			11.50%												Secured Debt						(5)						—						—						1,915						22,269						44						2,000						20,313
			9.00%												Secured Debt						(5)						—						—						266						3,909						—						24						3,885
Market Force Information, LLC			12.00%			L+			11.00%						Secured Debt						(9)						—						—						282						1,600						1,800						—						3,400
			12.00%									12.00%			Secured Debt						(9)						—						(2,403)						—						13,562						—						2,403						11,159
MH Corbin Holding LLC															Preferred Member Units						(5)						—						(2,370)						—						2,370						—						2,370						—
			13.00%												Secured Debt						(5)						—						(2,059)						854						8,280						25						2,299						6,006
MSC Adviser I, LLC															Member Units						(8)						—						11,320						3,908						116,760						11,320						—						128,080
Mystic Logistics Holdings, LLC															Common Stock						(6)						—						(1,820)						548						8,990						—						1,820						7,170
			12.00%												Secured Debt						(6)						—						—						622						6,723						7						24						6,706
OMi Holdings, Inc.															Preferred Member Units						(8)						—						(170)						1,330						20,380						—						170						20,210
			12.00%												Secured Debt						(8)						—						176						550						—						18,000						—						18,000
PPL RVs, Inc.															Common Stock						(8)						—						2,190						805						11,500						2,190						—						13,690

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2021

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1)(10)(11)						Geography						Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2020 Fair Value						Gross Additions(3)						Gross Reductions(4)						September 30, 2021 Fair Value
			7.50%			L+			7.00%						Secured Debt						(8)						—						(21)						708						11,806						790						221						12,375
Principle Environmental, LLC															Warrants						(8)						—						330						—						870						330						1,200						—
															Common Stock						(8)						—						(490)						—						—						1,200						490						710
															Preferred Member Units						(8)						—						(920)						—						10,500						—						920						9,580
			13.00%												Secured Debt						(8)						—						(62)						649						6,397						18						63						6,352
Quality Lease Service, LLC															Member Units						(7)						—						(180)						—						4,460						—						1,430						3,030
Trantech Radiator Topco, LLC															Common Stock						(7)						—						620						87						6,030						620						—						6,650
			12.00%												Secured Debt						(7)						—						—						811						8,644						14						—						8,658
Ziegler’s NYPD, LLC															Preferred Member Units						(8)						—						350						—						1,780						350						—						2,130
			12.00%												Secured Debt						(8)						—						—						57						625						—						—						625
			14.00%												Secured Debt						(8)						—						—						292						2,750						—						—						2,750
			6.50%												Secured Debt						(8)						—						21						49						979						21						—						1,000
Other controlled investments
2717 MH, L.P.															LP Interests (2717 HPP-MS, L.P.)						(8)						—						—						—						250						—						250						—
															LP Interests (2717 MH, L.P.)						(8)						—						585						—						2,702						689						—						3,391
ASC Interests, LLC															Member Units						(8)						—						(400)						—						1,120						—						400						720
			13.00%												Secured Debt						(8)						—						—						193						1,715						116						—						1,831
ATS Workholding, LLC			5.00%												Secured Debt						(9)						—						(304)						—						3,347						—						472						2,875
Barfly Ventures, LLC															Member Units						(5)						—						346						—						1,584						346						—						1,930
			7.00%												Secured Debt						(5)						—						—						58						343						367						—						710
Bolder Panther Group, LLC			10.50%			L+			9.00%						Secured Debt						(9)						—						329						2,582						27,225						11,775						—						39,000
			14.00%												Class A Preferred Member Units						(9)						—						—						1,067						10,194						—						—						10,194
			8.00%												Class B Preferred Member Units						(9)						—						6,310						2,087						14,000						6,310						—						20,310
			9.50%			L+			8.00%						Secured Debt						(9)						—						—						36						—						500						500						—
Bond-Coat, Inc.															Common Stock						(8)						(2,320)						4,310						—						2,040						4,310						6,350						—
Brewer Crane Holdings, LLC															Preferred Member Units						(9)						—						(1,570)						397						5,850						—						1,570						4,280
			11.00%			L+			10.00%						Secured Debt						(9)						—						—						708						8,513						15						372						8,156
Bridge Capital Solutions Corporation															Preferred Member Units						(6)						—						—						75						1,000						—						—						1,000
															Warrants						(6)						—						840						—						3,220						840						—						4,060
			13.00%												Secured Debt						(6)						—						—						100						998						2						—						1,000
			13.00%												Secured Debt						(6)						—						—						1,279						8,403						410						—						8,813
CBT Nuggets, LLC															Member Units						(9)						—						6,540						1,901						46,080						6,540						—						52,620
Centre Technologies Holdings, LLC															Preferred Member Units						(8)						—						(320)						90						6,160						—						320						5,840
			12.00%			L+			10.00%						Secured Debt						(8)						—						—						969						11,549						28						2,059						9,518
Chamberlin Holding LLC															Member Units						(8)						—						160						51						1,270						160						—						1,430
															Member Units						(8)						—						(3,930)						3,707						28,070						—						3,930						24,140
			9.00%			L+			8.00%						Secured Debt						(8)						—						18						1,117						15,212						4,000						1,395						17,817
Charps, LLC															Preferred Member Units						(5)						—						3,720						2,120						10,520						3,720						—						14,240
			10.00%												Unsecured Debt						(5)						—						(382)						846						8,475						282						3,723						5,034
			15.00%												Secured Debt						(5)						—						—						4						669						—						669						—

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2021

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1)(10)(11)						Geography						Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2020 Fair Value						Gross Additions(3)						Gross Reductions(4)						September 30, 2021 Fair Value
Colonial Electric Company LLC															Preferred Member Units						(6)						—						780						200						—						8,460						—						8,460
			12.00%												Secured Debt						(6)						—						—						1,938						—						24,969						315						24,654
CompareNetworks Topco, LLC															Preferred Member Units						(9)						—						5,220						316						6,780						5,220						—						12,000
			10.00%			L+			9.00%						Secured Debt						(9)						—						(16)						609						7,954						15						1,492						6,477
Copper Trail Energy Fund I, LP - CTMH															LP Interests (CTMH, LP)						(9)						—						—						—						747						—						37						710
Digital Products Holdings LLC															Preferred Member Units						(5)						—						—						150						9,835						—						—						9,835
			11.00%			L+			10.00%						Secured Debt						(5)						—						—						1,494						18,077						33						990						17,120
Garreco, LLC															Member Units						(8)						—						800						—						1,410						800						—						2,210
			9.00%			L+			8.00%						Secured Debt						(8)						—						—						308						4,519						—						—						4,519
Gulf Manufacturing, LLC															Member Units						(8)						—						1,130						1,210						4,510						1,130						—						5,640
Gulf Publishing Holdings, LLC			10.50%			L+			9.50%			5.25%			Secured Debt						(8)						—						—						17						250						14						7						257
			12.50%									6.25%			Secured Debt						(8)						—						(2,012)						1,065						12,044						849						2,431						10,462
Harrison Hydra-Gen, Ltd.															Common Stock						(8)						—						(1,920)						—						5,450						—						1,920						3,530
J&J Services, Inc.															Preferred Stock						(7)						—						2,720						—						12,680						2,720						—						15,400
			11.50%												Secured Debt						(7)						—						(30)						1,084						12,800						30						2,030						10,800
KBK Industries, LLC															Member Units						(5)						—						420						456						13,200						420						—						13,620
MS Private Loan Fund															LP Interests						(8)						—						—						—						—						1,000						—						1,000
			5.00%												Unsecured Debt						(8)						—						—						642						—						33,866						3,575						30,291
MSC Income Fund Inc.			5.00%												Unsecured Debt						(8)						—						352						1,603						—						60,000						—						60,000
NAPCO Precast, LLC															Member Units						(8)						—						(2,540)						1,823						16,100						—						2,540						13,560
Nebraska Vet AcquireCo, LLC (NVS)															Preferred Member Units						(5)						—						—						—						6,500						—						—						6,500
			12.00%												Secured Debt						(5)						—						—						979						10,395						13						—						10,408
NexRev LLC															Preferred Member Units						(8)						—						1,810						60						1,470						1,810						—						3,280
			11.00%												Secured Debt						(8)						—						(1,351)						1,417						16,727						28						2,005						14,750
NRI Clinical Research, LLC															Member Units						(9)						8,786						(4,835)						2,805						5,600						—						5,600						—
															Warrants						(9)						—						(1,238)						—						1,490						—						1,490						—
			9.00%												Secured Debt						(9)						—						(48)						380						5,620						48						5,668						—
NRP Jones, LLC															Member Units						(5)						—						3,619						(45)						2,821						3,619						—						6,440
			12.00%												Secured Debt						(5)						—						—						189						2,080						—						—						2,080
NuStep, LLC															Preferred Member Units						(5)						—						2,720						—						10,780						2,720						—						13,500
			10.50%												Secured Debt						(5)						—						17						1,507						17,193						47						—						17,240
			7.50%			L+			6.50%						Secured Debt						(5)						—						—						25						—						2,000						400						1,600
Orttech Holdings, LLC															Preferred Stock						(5)						—						—						—						—						12,600						1,000						11,600
			12.00%			L+			11.00%						Secured Debt						(5)						—						—						767						—						24,183						—						24,183
Pearl Meyer Topco LLC															Member Units						(6)						—						5,539						1,949						15,940						5,540						—						21,480
			12.00%												Secured Debt						(6)						—						258						3,223						37,202						310						3,838						33,674
Pegasus Research Group, LLC															Member Units						(8)						—						(1,550)						—						8,830						—						1,550						7,280
River Aggregates, LLC															Member Units						(8)						—						160						125						3,240						160						—						3,400
Tedder Industries, LLC															Preferred Member Units						(9)						—						—						—						8,136						—						—						8,136
			12.00%												Secured Debt						(9)						—						—						1,486						16,301						2,032						1,600						16,733
UnionRock Energy Fund II, LP															LP Interests						(9)						—						2,407						—						2,894						3,781						220						6,455
Vision Interests, Inc.															Series A Preferred Stock						(9)						—						(160)						—						3,160						—						160						3,000
			13.00%												Secured Debt						(9)						—						—						200						2,028						—						—						2,028
Other

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2021

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1)(10)(11)						Geography						Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2020 Fair Value						Gross Additions(3)						Gross Reductions(4)						September 30, 2021 Fair Value
Amounts related to investments transferred from other 1940 Act classification during the period																											—						—						—						—						—						—						—
Total Control investments																											$	(4,459)					$	65,756					$	85,904					$	1,113,725					$	340,046					$	117,553					$	1,336,218
Affiliate Investments
AAC Holdings, Inc.															Common Stock						(7)						$	—					$	(1,038)					$	—					$	3,148					$	—					$	1,038					$	2,110
															Warrants						(7)						—						(968)						—						2,938						—						968						1,970
			18.00%									8.00%			Secured Debt						(7)						—						(89)						1,329						9,187						744						223						9,708
AFG Capital Group, LLC															Preferred Member Units						(8)						—						1,570						200						5,810						1,570						—						7,380
			10.00%												Secured Debt						(8)						—						—						26						491						—						260						231
ATX Networks Corp.			10.00%									10.00%			Secured Debt						(6)						—						—						—						—						1,963						—						1,963
			8.50%			L+			7.50%						Secured Debt						(6)						—						—						—						—						7,092						—						7,092
			8.75%			L+			6.25%			1.50%			Secured Debt						(6)						(4,528)						1,133						—						12,263						1,521						13,784						—
BBB Tank Services, LLC															Member Units						(8)						—						(280)						—						280						—						280						—
			12.00%			L+			11.00%						Unsecured Debt						(8)						—						(1,000)						464						4,722						27						1,001						3,748
			15.00%									15.00%			Preferred Stock (non-voting)						(8)						—						(162)						11						151						11						162						—
Boccella Precast Products LLC															Member Units						(6)						—						(1,210)						379						6,040						—						1,210						4,830
			10.00%												Secured Debt						(6)						—						—						1						—						320						—						320
Brightwood Capital Fund Investments - Fund V															LP Interests (Brightwood Capital Fund V, LP)						(6)						—						—						—						—						1,000						—						1,000
Buca C, LLC			10.25%			L+			9.25%						Secured Debt						(7)						—						(373)						1,264						14,256						487						373						14,370
CAI Software LLC															Member Units						(6)						—						7,321						1,900						7,190						7,321						1,921						12,590
			12.50%												Secured Debt						(6)						—						(1)						5,547						47,474						23,601						4,474						66,601
Chandler Signs Holdings, LLC															Class A Units						(8)						—						(810)						—						1,460						—						810						650
Charlotte Russe, Inc															Common Stock						(9)						(3,141)						3,141						—						—						3,141						3,141						—
Classic H&G Holdings, LLC															Preferred Member Units						(6)						—						4,110						820						9,510						4,110						—						13,620
			7.00%			L+			6.00%						Secured Debt						(6)						—						—						26						—						1,400						—						1,400
			8.00%												Secured Debt						(6)						—						(73)						1,807						24,800						73						5,599						19,274
Congruent Credit Opportunities Funds															LP Interests (Congruent Credit Opportunities Fund  II, LP)						(8)						(4,449)						4,355						—						94						4,355						4,449						—
															LP Interests (Congruent Credit Opportunities Fund  III, LP)						(8)						—						(96)						583						11,540						—						1,137						10,403
Copper Trail Energy Fund I, LP															LP Interests (Copper Trail Energy Fund I, LP)						(9)						(203)						379						378						1,782						379						2,161						—
Dos Rios Partners															LP Interests (Dos Rios Partners - A, LP)						(8)						—						1,450						—						1,720						1,450						—						3,170
															LP Interests (Dos Rios Partners, LP)						(8)						—						4,567						—						5,417						4,567						—						9,984
Dos Rios Stone Products LLC															Class A Preferred Units						(8)						—						(340)						—						1,250						—						340						910
East Teak Fine Hardwoods, Inc.															Common Stock						(7)						(80)						180						100						300						180						480						—
EIG Fund Investments															LP Interests (EIG Global Private Debt Fund-A, L.P.)						(8)						9						92						35						526						125						177						474
Freeport Financial SBIC Fund LP															LP Interests (Freeport Financial SBIC Fund LP)						(5)						—						869						—						5,264						869						—						6,133

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2021

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1)(10)(11)						Geography						Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2020 Fair Value						Gross Additions(3)						Gross Reductions(4)						September 30, 2021 Fair Value
															LP Interests (Freeport First Lien Loan Fund III LP)						(5)						—						66						613						10,321						66						3,156						7,231
GFG Group, LLC.															Preferred Member Units						(5)						—						2,090						460						—						6,990						—						6,990
			12.00%												12.00% Secured Debt						(5)						—						—						1,211						—						15,631						3,200						12,431
Hawk Ridge Systems, LLC															Preferred Member Units						(9)						—						270						—						420						270						—						690
															Preferred Member Units						(9)						—						5,130						691						8,030						5,130						—						13,160
			7.00%			L+			6.00%						Secured Debt						(9)						—						—						23						—						2,585						—						2,585
			9.00%												Secured Debt						(9)						—						(25)						1,366						18,400						25						25						18,400
Houston Plating and Coatings, LLC															Member Units						(8)						—						(1,620)						180						5,080						—						1,620						3,460
			8.00%												Unsecured Convertible Debt						(8)						—						—						182						2,900						—						—						2,900
HPEP 3, L.P.															LP Interests (HPEP 3, L.P.)						(8)						—						803						—						3,258						1,177						252						4,183
I-45 SLF LLC															Member Units (Fully diluted 20.0%; 24.40% profits  interest) (8)						(8)						—						413						1,386						15,787						1,215						2,000						15,002
Iron-Main Investments, LLC															Common Stock						(5)						—						—						—						—						1,027						—						1,027
			12.50%												Secured Debt						(5)						—						—						98						—						3,168						—						3,168
			13.00%												Secured Debt						(5)						—						—						191						—						4,555						—						4,555
L.F. Manufacturing Holdings, LLC															Member Units						(8)						—						50						—						2,050						50						—						2,100
			14.00%									14.00%			Preferred Member Units (non-voting)						(8)						—						—						10						93						10						—						103
Meisler Operating LLC															Common Stock						(5)						17,048						(7,414)						—						16,010						—						16,010						—
OnAsset Intelligence, Inc.															Common Stock						(8)						—						(830)						—						—						830						830						—
															Warrants						(8)						—						830						—						—						830						830						—
			10.00%									10.00%			Unsecured Debt						(8)						—						—						6						64						129						6						187
			12.00%									12.00%			Secured Debt						(8)						—						—						685						7,301						686						—						7,987
Oneliance, LLC															Preferred Stock						(7)						—						—						—						—						1,056						—						1,056
			12.00%			L+			11.00%						Secured Debt						(7)						—						—						162						—						5,545						—						5,545
PCI Holding Company, Inc.															Preferred Stock						(9)						—						(203)						2,852						4,130						—						4,130						—
Rocaceia, LLC (Quality Lease and Rental Holdings, LLC)			12.00%												Secured Debt						(8)						(694)						—						—						—						—						—						—
SI East, LLC (Stavig)															Preferred Member Units						(7)						—						5,422						2,102						9,780						5,422						4,782						10,420
			10.25%												Secured Debt						(7)						—						(74)						2,332						32,962						34,500						3,862						63,600
Slick Innovations, LLC															Common Stock						(6)						—						180						—						1,330						180						—						1,510
															Warrants						(6)						—						40						—						360						40						—						400
			13.00%												Secured Debt						(6)						—						(33)						545						5,720						33						433						5,320
Sonic Systems International, LLC															Common Stock						(8)						—						—						26						—						1,070						—						1,070
			8.50%			L+			7.50%						Secured Debt						(8)						—						—						111						—						11,747						—						11,747
Superior Rigging & Erecting Co.															Preferred Member Units						(7)						—						—						—						4,500						—						—						4,500
			12.00%												Secured Debt						(7)						—						—						1,982						21,298						25						—						21,323
The Affiliati Network, LLC															Preferred Stock						(9)						—						—						—						—						6,400						—						6,400
			10.00%												Secured Debt						(9)						—						—						2						—						381						—						381
			11.83%												Secured Debt						(9)						—						—						421						—						13,862						239						13,623
UniTek Global Services, Inc.			15.00%									15.00%			Secured Convertible Debt						(6)						—						966						105						—						2,249						87						2,162
			20.00%									20.00%			Preferred Stock						(6)						—						737						—						375						737						—						1,112
			20.00%									20.00%			Preferred Stock						(6)						—						(230)						230						2,833						230						230						2,833
			8.50%			L+			5.50%			2.00%			Secured Debt						(6)						—						114						183						2,425						243						454						2,214

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2021

(dollars in thousands)

(unaudited)

Company			Total Rate			Base Rate			Spread			PIK Rate			Type of Investment(1)(10)(11)						Geography						Amount of Realized Gain/(Loss)						Amount of Unrealized Gain/(Loss)						Amount of Interest, Fees or Dividends Credited to Income(2)						December 31, 2020 Fair Value						Gross Additions(3)						Gross Reductions(4)						September 30, 2021 Fair Value
Volusion, LLC															Preferred Member Units						(8)						—						—						—						5,990						—						—						5,990
			11.50%												Secured Debt						(8)						—						991						1,736						19,243						991						2,800						17,434
			8.00%												Unsecured Convertible Debt						(8)						—						118						24						291						118						—						409
Other																											—						—						—						—						—						—						—
Amounts related to investments transferred from other 1940 Act classification during the period																											—						—						—						(12,263)						—						—						—
Total Affiliate investments																											$	3,962					$	30,518					$	34,785					$	366,301					$	195,509					$	88,934					$	485,139

________________

(1)The principal amount, the ownership detail for equity investments and if the investment is income producing is included in the Consolidated Schedule of Investments included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q.

(2)Represents the total amount of interest, fees and dividends credited to income for the portion of the period for which an investment was included in Control or Affiliate categories, respectively. For investments transferred between Control and Affiliate categories during the period, any income or investment balances related to the time period it was in the category other than the one shown at period end is included in “Amounts from investments transferred from other 1940 Act classifications during the period.”

(3)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, follow-on investments and accrued PIK interest, and the exchange of one or more existing securities for one or more new securities. Gross additions also include net increases in unrealized appreciation or net decreases in net unrealized depreciation as well as the movement of an existing portfolio company into this category and out of a different category.

(4)Gross reductions include decreases in the cost basis of investments resulting from principal repayments or sales and the exchange of one or more existing securities for one or more new securities. Gross reductions also include net increases in net unrealized depreciation or net decreases in unrealized appreciation as well as the movement of an existing portfolio company out of this category and into a different category.

(5)Portfolio company located in the Midwest region as determined by location of the corporate headquarters. The fair value as of September 30, 2021 for control investments located in this region was $297,953. This represented 25.9% of net assets as of September 30, 2021. The fair value as of September 30, 2021 for affiliate investments located in this region was $41,535. This represented 13.9% of net assets as of September 30, 2021.

(6)Portfolio company located in the Northeast region as determined by location of the corporate headquarters. The fair value as of September 30, 2021 for control investments located in this region was $117,017. This represented 10.8% of net assets as of September 30, 2021. The fair value as of September 30, 2021 for affiliate investments located in this region was $144,241. This represented 21.7% of net assets as of September 30, 2021.

(7)Portfolio company located in the Southeast region as determined by location of the corporate headquarters. The fair value as of September 30, 2021 for control investments located in this region was $44,538. This represented 1.2% of net assets as of September 30, 2021. The fair value as of September 30, 2021 for affiliate investments located in this region was $134,602. This represented 40.5% of net assets as of September 30, 2021.

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates (Continued)

September 30, 2021

(dollars in thousands)

(unaudited)

(8)Portfolio company located in the Southwest region as determined by location of the corporate headquarters. The fair value as of September 30, 2021 for control investments located in this region was $573,437. This represented 44.4% of net assets as of September 30, 2021. The fair value as of September 30, 2021 for affiliate investments located in this region was $109,522. This represented 20.5% of net assets as of September 30, 2021.

(9)Portfolio company located in the West region as determined by location of the corporate headquarters. The fair value as of September 30, 2021 for control investments located in this region was $303,273. This represented 37.3% of net assets as of September 30, 2021. The fair value as of September 30, 2021 for affiliate investments located in this region was $55,239. This represented 17.3% of net assets as of September 30, 2021.

(10)All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities,” unless otherwise noted.

(11)This schedule should be read in conjunction with the Consolidated Schedule of Investments and Notes to the Consolidated Financial Statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. Supplemental information can be located within the Consolidated Schedule of Investments including end of period interest rate, preferred dividend rate, maturity date, investments not paid currently in cash and investments whose value was determined using significant unobservable inputs.

(12)Investment has an unfunded commitment as of September 30, 2021 (see Note K). The fair value of the investment includes the impact of the fair value of any unfunded commitments.

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Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This Quarterly Report on Form 10-Q contains forward-looking statements regarding the plans and objectives of management for future operations and which relate to future events or our future performance or financial condition. Any such forward-looking statements may involve known and unknown risks, uncertainties and other factors which may cause our actual results, performance or achievements to be materially different from future results, performance or achievements expressed or implied by any forward-looking statements. Forward-looking statements, which involve assumptions and describe our future plans, strategies and expectations, are generally identifiable by use of the words “may,” “will,” “should,” “expect,” “anticipate,” “estimate,” “believe,” “intend” or “project” or the negative of these words or other variations on these words or comparable terminology. These forward-looking statements are based on assumptions that may be incorrect, and we cannot assure you that the projections included in these forward-looking statements will come to pass. Our actual results could differ materially from those expressed or implied by the forward-looking statements as a result of various factors, including, without limitation the factors referenced in Item 1A entitled “Risk Factors” below in Part II of this Quarterly Report on Form 10-Q, if any, and discussed in Item 1A entitled “Risk Factors” in Part I of our Annual Report on Form 10-K for the year ended December 31, 2021, filed with the Securities and Exchange Commission (“SEC”) on February 25, 2022 and elsewhere in this Quarterly Report on Form 10-Q and our other SEC filings. Other factors that could cause actual results to differ materially include changes in the economy and future changes in laws or regulations and conditions in our operating areas.

We have based the forward-looking statements included in this Quarterly Report on Form 10-Q on information available to us on the date of this Quarterly Report on Form 10-Q, and we assume no obligation to update any such forward-looking statements, unless we are required to do so by applicable law. However, you are advised to refer to any additional disclosures that we may make directly to you or through reports that we in the future may file with the SEC, including subsequent periodic and current reports.

This discussion should be read in conjunction with our consolidated financial statements as of December 31, 2021, and for the year then ended, and Management’s Discussion and Analysis of Financial Condition and Results of Operations, both contained in our Annual Report on Form 10-K for the year ended December 31, 2021, as well as the consolidated financial statements (unaudited) and notes to the consolidated financial statements (unaudited) contained in this report.

ORGANIZATION

Main Street Capital Corporation (“MSCC” or “Main Street”) is a principal investment firm. MSCC wholly owns several investment funds, including Main Street Mezzanine Fund, LP (“MSMF”) and Main Street Capital III, LP (“MSC III” and, together with MSMF, the “Funds”), and each of their general partners. MSCC has certain direct and indirect wholly-owned subsidiaries that have elected to be taxable entities (the “Taxable Subsidiaries”). The primary purpose of the Taxable Subsidiaries is to permit MSCC to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes.

ECONOMIC UPDATE

The recent disruption of the U.S. and global economies, including supply chain delays, labor and material availability constraints, price increases and other impacts of inflation, cost and availability of capital and the effects of the COVID-19 pandemic and geopolitical events, has had, and threatens to continue to have, adverse consequences for our business and operating results, and the businesses and operating results of our portfolio companies. During the quarter ended September 30, 2022, we continued to work collectively with our employees and portfolio companies to navigate these significant challenges. Neither our management team nor our Board of Directors is able to predict the full impact of the economic disruption, including its duration and the magnitude. As such, while we will continue to monitor the evolving situation, we are unable to predict with any certainty the extent to which these events, or any future impacts, will negatively affect our portfolio companies’ operating results and financial condition or the impact that such disruptions may have on our results of operations and financial condition in the future.

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OVERVIEW OF OUR BUSINESS

Our principal investment objective is to maximize our portfolio’s total return by generating current income from our debt investments and current income and capital appreciation from our equity and equity-related investments, including warrants, convertible securities and other rights to acquire equity securities in a portfolio company. We seek to achieve our investment objective through our lower middle market (“LMM”), Private Loan (as defined below) and middle market (“Middle Market”) investment strategies. Our LMM investment strategy involves investments in companies that generally have annual revenues between $10 million and $150 million and our LMM portfolio investments generally range in size from $5 million to $75 million. Our private loan (“Private Loan”) investment strategy involves investments in companies that are consistent with the size of the companies in our LMM and Middle Market investment strategies, and our Private Loan investments generally range in size from $10 million to $75 million. Our Middle Market investment strategy involves investments in companies that are generally larger in size than our LMM companies, with annual revenues typically between $150 million and $1.5 billion, and our Middle Market investments generally range in size from $3 million to $25 million.

We seek to fill the financing gap for LMM businesses, which, historically, have had limited access to financing from commercial banks and other traditional sources. The underserved nature of the LMM creates the opportunity for us to meet the financing needs of LMM companies while also negotiating favorable transaction terms and equity participations. Our ability to invest across a company’s capital structure, from secured loans to equity securities, allows us to offer portfolio companies a comprehensive suite of financing options, or a “one stop” financing solution. Providing customized, “one stop” financing solutions is important to LMM portfolio companies. We generally seek to partner directly with entrepreneurs, management teams and business owners in making our investments. Our LMM portfolio debt investments are generally secured by a first lien on the assets of the portfolio company and typically have a term of between five and seven years from the original investment date.

Private Loan investments generally consist of loans that have been originated directly by us or through strategic relationships with other investment funds on a collaborative basis and are often referred to in the debt markets as “club deals.” Our Private Loan portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have a term of between three and seven years from the original investment date. We may also invest alongside the sponsor in the equity securities of our Private Loan portfolio companies.

Our Middle Market portfolio investments primarily consist of direct investments in or secondary purchases of interest-bearing syndicated loans or debt securities in privately held companies based in the United States that are generally larger in size than the companies included in our LMM portfolio. Our Middle Market portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have an expected duration of between three and seven years from the original investment date.

Our other portfolio (“Other Portfolio”) investments primarily consist of investments that are not consistent with the typical profiles for our LMM, Private Loan or Middle Market portfolio investments, including investments which may be managed by third parties. In our Other Portfolio, we may incur indirect fees and expenses in connection with investments managed by third parties, such as investments in other investment companies or private funds.

Subject to changes in our cash and overall liquidity, our Investment Portfolio may also include short-term portfolio investments that are atypical of our LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital. These assets are typically expected to be liquidated in one year or less and are not expected to be a significant portion of the overall Investment Portfolio.

Our external asset management business is conducted through MSC Adviser I, LLC (the “External Investment Manager”). We have entered into an agreement with the External Investment Manager to share employees in connection with its asset management business generally, and specifically for its relationship with MSC Income Fund, Inc. (“MSC Income”) and its other clients. Through this agreement, we share employees with the External Investment Manager, including their related infrastructure, business relationships, management expertise and capital raising capabilities.

Our portfolio investments are generally made through MSCC, the Taxable Subsidiaries and the Funds. MSCC, the Taxable Subsidiaries and the Funds share the same investment strategies and criteria, although they are subject to different regulatory regimes. An investor’s return in MSCC will depend, in part, on the Taxable Subsidiaries’ and the Funds’ investment returns as they are wholly-owned subsidiaries of MSCC.

The level of new portfolio investment activity will fluctuate from period to period based upon our view of the current economic fundamentals, our ability to identify new investment opportunities that meet our investment criteria,

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and our ability to consummate the identified opportunities. The level of new investment activity, and associated interest and fee income, will directly impact future investment income. In addition, the level of dividends paid by portfolio companies and the portion of our portfolio debt investments on non-accrual status will directly impact future investment income. While we intend to grow our portfolio and our investment income over the long term, our growth and our operating results may be more limited during depressed economic periods. However, we intend to appropriately manage our cost structure and liquidity position based on applicable economic conditions and our investment outlook. The level of realized gains or losses and unrealized appreciation or depreciation on our investments will also fluctuate depending upon portfolio activity, economic conditions and the performance of our individual portfolio companies. The changes in realized gains and losses and unrealized appreciation and depreciation could have a material impact on our operating results.

Because we are internally managed, we do not pay any external investment advisory fees, but instead directly incur the operating costs associated with employing investment and portfolio management professionals. We believe that our internally managed structure provides us with a better alignment of interests between our management team, our employees and our shareholders, and a beneficial operating expense structure when compared to other publicly traded and privately held investment firms which are externally managed. Our internally managed structure allows us the opportunity to leverage our non-interest operating expenses as we grow our Investment Portfolio and our External Investment Manager’s asset management business. The ratio of our total operating expenses, excluding interest expense, as a percentage of our quarterly average total assets was 1.4% and 1.5%, for the trailing twelve months ended September 30, 2022 and 2021, respectively, and 1.5% for the year ended December 31, 2021. The ratio of our total operating expenses, including interest expense, as a percentage of our quarterly average total assets was 3.3% for each of the trailing twelve months ended September 30, 2022 and 2021, and 3.4% for the year ended December 31, 2021. Our ratio of expenses as a percentage of our average net asset value is described in greater detail in Note F – Financial Highlights to the consolidated financial statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q.

The External Investment Manager serves as the investment adviser and administrator to MSC Income pursuant to an Investment Advisory and Administrative Services Agreement entered into in October 2020 between the External Investment Manager and MSC Income (the “Advisory Agreement”). Under the Advisory Agreement, the External Investment Manager earns a 1.75% annual base management fee on MSC Income’s average total assets, an incentive fee equal to 20% of pre-investment fee net investment income above a specified investment return hurdle rate and a 20% incentive fee on cumulative net realized capital gains in exchange for providing advisory services to MSC Income.

Additionally, the External Investment Manager has entered into an Investment Management Agreement with MS Private Loan Fund I, LP, a private investment fund with a strategy to co-invest with Main Street in Private Loan portfolio investments (the “Private Loan Fund”), pursuant to which the External Investment Manager provides investment advisory and management services to the Private Loan Fund in exchange for an asset-based fee and certain incentive fees. The External Investment Manager may also advise other clients, including funds and separately managed accounts, pursuant to advisory and services agreements with such clients in exchange for asset-based and incentive fees.

The External Investment Manager provides administrative services for certain External Party clients that, to the extent not waived, are reported as administrative services fees. The administrative services fees generally represent expense reimbursements for a portion of the compensation, overhead and related expenses for certain professionals directly attributable to performing administrative services for clients. These fees are recognized as other revenue in the period in which the related services are rendered.

The External Investment Manager earns management fees based on the assets of the funds and accounts under management and may earn incentive fees, or a carried interest, based on the performance of the funds and accounts managed. The total contribution of the External Investment Manager to our net investment income consists of the combination of the expenses allocated to the External Investment Manager and the dividend income earned from the External Investment Manager. The total contribution to our net investment income was $5.0 million and $4.2 million for the three months ended September 30, 2022 and 2021, respectively. The External Investment Manager earned base management fee income of $5.5 million and $4.6 million during the three months ended September 30, 2022 and 2021, respectively. During the three months ended September 30, 2022, the External Investment Manager did not earn incentive fee income. Incentive fee income earned in the three months ended September 30, 2021 was not significant. During the three months ended September 30, 2022, the External Investment Manager earned $0.2 million in administrative services fee income. No administrative services fee income was earned in the three months ended September 30, 2021. Our total expenses are net of expenses allocated to the External Investment Manager for the three months ended September 30, 2022 and 2021 of $3.3 million and $2.7 million, respectively. The total contribution to our net investment income was $15.2 million and $11.6 million for the nine months ended September 30, 2022 and 2021,

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respectively. The External Investment Manager earned base management fee income of $16.3 million and $12.7 million during the nine months ended September 30, 2022 and 2021, respectively. Incentive fee income earned during the nine months ended September 30, 2022 and 2021, respectively, was not significant. During the nine months ended September 30, 2022, the External Investment Manager earned $0.5 million in administrative services fee income. No administrative services fee income was earned in the nine months ended September 30, 2021. Our total expenses are net of expenses allocated to the External Investment Manager for the nine months ended September 30, 2022 and 2021 of $9.6 million and $7.7 million, respectively.

We have received an exemptive order from the SEC permitting co-investments among us, MSC Income and other funds and clients advised by the External Investment Manager in certain negotiated transactions where co-investing would otherwise be prohibited under the 1940 Act. We have made co-investments with, and in the future intend to continue to make co-investments with MSC Income, the Private Loan Fund and other clients advised by the External Investment Manager, in accordance with the conditions of the order. The order requires, among other things, that we and the External Investment Manager consider whether each such investment opportunity is appropriate for us and the External Investment Manager’s advised clients, as applicable, and if it is appropriate, to propose an allocation of the investment opportunity between such parties. Because the External Investment Manager may receive performance-based fee compensation from funds and clients advised by the External Investment Manager, this may provide the Company and the External Investment Manager an incentive to allocate opportunities to other participating funds and clients instead of us. However, both we and the External Investment Manager have policies and procedures in place to manage this conflict, including oversight by the independent members of our Board of Directors. Additional information regarding the operation of the co-investment program is set forth in the order granting exemptive relief, which may be reviewed on the SEC’s website at www.sec.gov. In addition to the co-investment program described above, we also co-invest in syndicated deals and other transactions where only price is negotiated by us and our affiliates.

INVESTMENT PORTFOLIO SUMMARY

The following tables provide a summary of our investments in the LMM, Private Loan and Middle Market portfolios as of September 30, 2022 and December 31, 2021 (this information excludes the Other Portfolio investments, short-term portfolio investments and the External Investment Manager which are discussed further below):

			As of September 30, 2022
			LMM (a)						Private Loan						Middle Market
			(dollars in millions)
Number of portfolio companies			75						87						33
Fair value			$	1,910.9					$	1,476.9					$	354.3
Cost			$	1,593.7					$	1,523.8					$	419.4
Debt investments as a % of portfolio (at cost)			73.0		%				97.1		%				94.4		%
Equity investments as a % of portfolio (at cost)			27.0		%				2.9		%				5.6		%
% of debt investments at cost secured by first priority lien			99.1		%				99.9		%				98.8		%
Weighted-average annual effective yield (b)			11.8		%				9.9		%				9.6		%
Average EBITDA (c)			$	7.7					$	41.9					$	70.7

____________________

(a)At September 30, 2022, we had equity ownership in all of our LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 41%.

(b)The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of September 30, 2022, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield on our debt portfolio as of September 30, 2022 including debt investments on non-accrual status was 11.1% for our LMM portfolio, 9.6% for our Private Loan portfolio and 9.1% for our Middle Market portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of our common stock will realize on its investment because it does not reflect changes in the market value of our stock, our utilization of debt capital in our capital structure, our expenses or any sales load paid by an investor.

(c)The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan and Middle Market portfolios. These calculations exclude certain portfolio companies, including three LMM portfolio companies and two Private Loan portfolio companies, as EBITDA is not a meaningful valuation

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metric for our investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate.

			As of December 31, 2021
			LMM (a)						Private Loan						Middle Market
			(dollars in millions)
Number of portfolio companies			73						75						36
Fair value			$	1,716.4					$	1,141.8					$	395.2
Cost			$	1,455.7					$	1,157.5					$	440.9
Debt investments as a % of portfolio (at cost)			70.9		%				95.7		%				93.3		%
Equity investments as a % of portfolio (at cost)			29.1		%				4.3		%				6.7		%
% of debt investments at cost secured by first priority lien			99.0		%				98.7		%				98.7		%
Weighted-average annual effective yield (b)			11.2		%				8.2		%				7.5		%
Average EBITDA (c)			$	6.2					$	41.3					$	76.0

____________________

(a)At December 31, 2021, we had equity ownership in all of our LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 40%.

(b)The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of December 31, 2021, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield on our debt portfolio as of December 31, 2021 including debt investments on non-accrual status was 10.6% for our LMM portfolio, 8.0% for our Private Loan portfolio and 6.9% for our Middle Market portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of our common stock will realize on its investment because it does not reflect changes in the market value of our stock, our utilization of debt capital in our capital structure, our expenses or any sales load paid by an investor.

(c)The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan and Middle Market portfolios. These calculations exclude certain portfolio companies, including three LMM portfolio companies, three Private Loan portfolio companies and one Middle Market portfolio company, as EBITDA is not a meaningful valuation metric for our investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate.

For the three months ended September 30, 2022 and 2021, we achieved an annualized total return on investments of 10.5% and 18.0%, respectively. For the nine months ended September 30, 2022 and 2021, we achieved an annualized total return on investments of 9.6% and 16.6%, respectively. For the year ended December 31, 2021, we achieved a total return on investments of 16.6%. Total return on investments is calculated using the interest, dividend and fee income, as well as the realized and unrealized change in fair value of the Investment Portfolio for the specified period. Our total return on investments is not reflective of what an investor in shares of our common stock will realize on its investment because it does not reflect changes in the market value of our stock, our utilization of debt capital in our capital structure, our expenses or any sales load paid by an investor.

As of September 30, 2022, we had Other Portfolio investments in 14 companies, collectively totaling $117.0 million in fair value and $121.3 million in cost basis and which comprised 2.9% and 3.3% of our Investment Portfolio at fair value and cost, respectively. As of December 31, 2021, we had Other Portfolio investments in 13 companies, collectively totaling $166.1 million in fair value and $173.7 million in cost basis and which comprised 4.7% and 5.3% of our Investment Portfolio at fair value and cost, respectively.

As previously discussed, the External Investment Manager is a wholly-owned subsidiary that is treated as a portfolio investment. As of September 30, 2022, this investment had a fair value of $112.5 million and a cost basis of $29.5 million, which comprised 2.8% and 0.8% of our Investment Portfolio at fair value and cost, respectively. As of December 31, 2021, this investment had a fair value of $140.4 million and a cost basis of $29.5 million, which comprised 3.9% and 0.9% of our Investment Portfolio at fair value and cost, respectively.

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CRITICAL ACCOUNTING POLICIES

The preparation of financial statements and related disclosures in conformity with generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and contingent assets and liabilities at the date of the financial statements, and revenues and expenses during the periods reported. Actual results could materially differ from those estimates. Critical accounting policies are those that require management to make subjective or complex judgments about the effect of matters that are inherently uncertain and may change in subsequent periods. Changes that may be required in the underlying assumptions or estimates in these areas could have a material impact on our current and future financial condition and results of operations.

Management has discussed the development and selection of each critical accounting policy and estimate with the Audit Committee of the Board of Directors. Our critical accounting policies and estimates include the Investment Portfolio Valuation and Revenue Recognition policies described below. Our significant accounting policies are described in greater detail in Note B—Summary of Significant Accounting Policies to the consolidated financial statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q.

Investment Portfolio Valuation

The most significant determination inherent in the preparation of our consolidated financial statements is the valuation of our Investment Portfolio and the related amounts of unrealized appreciation and depreciation. We consider this determination to be a critical accounting estimate, given the significant judgments and subjective measurements required. As of both September 30, 2022 and December 31, 2021, our Investment Portfolio valued at fair value represented 96% of our total assets. We are required to report our investments at fair value. We follow the provisions of FASB ASC 820, Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value and enhances disclosure requirements for fair value measurements. ASC 820 requires us to assume that the portfolio investment is to be sold in the principal market to independent market participants, which may be a hypothetical market. Market participants are defined as buyers and sellers in the principal market that are independent, knowledgeable and willing and able to transact. See Note B.1.—Valuation of the Investment Portfolio included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q for a detailed discussion of our investment portfolio valuation process and procedures.

Due to the inherent uncertainty in the valuation process, our determination of fair value for our Investment Portfolio may differ materially from the values that would have been determined had a ready market for the securities existed. In addition, changes in the market environment, portfolio company performance and other events that may occur over the lives of the investments may cause the gains or losses ultimately realized on these investments to be materially different than the valuations currently assigned. We determine the fair value of each individual investment and record changes in fair value as unrealized appreciation or depreciation.

In December 2020, the SEC adopted Rule 2a-5 under the 1940 Act, which permits a BDC’s board of directors to designate its executive officers or investment adviser as a valuation designee to determine the fair value for its investment portfolio, subject to the active oversight of the board. Our Board of Directors has approved policies and procedures pursuant to Rule 2a-5 (the “Valuation Procedures”) and has designated a group of our executive officers to serve as the Board of Directors’ valuation designee. We adopted the Valuation Procedures effective April 1, 2021. We believe our Investment Portfolio as of September 30, 2022 and December 31, 2021 approximates fair value as of those dates based on the markets in which we operate and other conditions in existence on those reporting dates.

Revenue Recognition

Interest and Dividend Income

We record interest and dividend income on the accrual basis to the extent amounts are expected to be collected. Dividend income is recorded as dividends are declared by the portfolio company or at the point an obligation exists for the portfolio company to make a distribution. In accordance with our valuation policies, we evaluate accrued interest and dividend income periodically for collectability. When a loan or debt security becomes 90 days or more past due, and if we otherwise do not expect the debtor to be able to service its debt obligation, we will generally place the loan or debt security on non-accrual status and cease recognizing interest income on that loan or debt security until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a loan or debt security’s status significantly

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improves regarding the debtor’s ability to service the debt obligation, or if a loan or debt security is sold or written off, we remove it from non-accrual status.

Fee Income

We may periodically provide services, including structuring and advisory services to our portfolio companies or other third parties. For services that are separately identifiable and evidence exists to substantiate fair value, fee income is recognized as earned, which is generally when the investment or other applicable transaction closes. Fees received in connection with debt financing transactions for services that do not meet these criteria are treated as debt origination fees and are deferred and accreted into income over the life of the financing.

Payment-in-Kind (“PIK”) Interest and Cumulative Dividends

We hold certain debt and preferred equity instruments in our Investment Portfolio that contain PIK interest and cumulative dividend provisions. The PIK interest, computed at the contractual rate specified in each debt agreement, is periodically added to the principal balance of the debt and is recorded as interest income. Thus, the actual collection of this interest may be deferred until the time of debt principal repayment. Cumulative dividends are recorded as dividend income, and any dividends in arrears are added to the balance of the preferred equity investment. The actual collection of these dividends in arrears may be deferred until such time as the preferred equity is redeemed or sold. To maintain RIC tax treatment (as discussed in Note B.9.—Summary of Significant Accounting Policies—Income Taxes included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though we may not have collected the PIK interest and cumulative dividends in cash. We stop accruing PIK interest and cumulative dividends and write off any accrued and uncollected interest and dividends in arrears when we determine that such PIK interest and dividends in arrears are no longer collectible. For the three months ended September 30, 2022 and 2021, (i) 1.2% and 2.1%, respectively, of our total investment income was attributable to PIK interest income not paid currently in cash and (ii) 0.3% and 0.6%, respectively, of our total investment income was attributable to cumulative dividend income not paid currently in cash. For the nine months ended September 30, 2022 and 2021, (i) 1.3% and 3.0%, respectively, of our total investment income was attributable to PIK interest income not paid currently in cash and (ii) 0.5% and 0.6%, respectively, of our total investment income was attributable to cumulative dividend income not paid currently in cash.

INVESTMENT PORTFOLIO COMPOSITION

The following tables summarize the composition of our total combined LMM portfolio investments, Private Loan portfolio investments and Middle Market portfolio investments at cost and fair value by type of investment as a percentage of the total combined LMM portfolio investments, Private Loan portfolio investments and Middle Market portfolio investments as of September 30, 2022 and December 31, 2021 (this information excludes the Other Portfolio, short-term portfolio investments and the External Investment Manager).

Cost:						September 30, 2022						December 31, 2021
First lien debt						85.4		%				82.5		%
Equity						13.9						16.2
Second lien debt						0.1						0.6
Equity warrants						0.2						0.3
Other						0.4						0.4
						100.0		%				100.0		%

Fair Value:						September 30, 2022						December 31, 2021
First lien debt						76.1		%				74.3		%
Equity						23.2						24.6
Second lien debt						0.2						0.5
Equity warrants						0.1						0.2
Other						0.4						0.4
						100.0		%				100.0		%

Our LMM portfolio investments, Private Loan portfolio investments and Middle Market portfolio investments carry a number of risks including: (1) investing in companies which may have limited operating histories and financial

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resources; (2) holding investments that generally are not publicly traded and which may be subject to legal and other restrictions on resale; and (3) other risks common to investing in below investment-grade debt and equity investments in our Investment Portfolio. Please see “Item 1A. Risk Factors—Risks Related to our Investments” contained in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 for a more complete discussion of the risks involved with investing in our Investment Portfolio.

PORTFOLIO ASSET QUALITY

We utilize an internally developed investment rating system to rate the performance of each LMM, Private Loan and Middle Market portfolio company and to monitor our expected level of returns on each of our LMM, Private Loan and Middle Market investments in relation to our expectations for the portfolio company. The investment rating system takes into consideration various factors, including each investment’s expected level of returns, the collectability of our debt investments and the ability to receive a return of the invested capital in our equity investments, comparisons to competitors and other industry participants, the portfolio company’s future outlook and other factors that are deemed to be significant to the portfolio company.

As of September 30, 2022, our total Investment Portfolio had 11 investments on non-accrual status, which comprised 0.8% of its fair value and 3.7% of its cost. As of December 31, 2021, our total Investment Portfolio had nine investments on non-accrual status, which comprised 0.7% of its fair value and 3.3% of its cost.

The operating results of our portfolio companies are impacted by changes in the broader fundamentals of the United States economy. In periods during which the United States economy contracts, it is likely that the financial results of small to mid-sized companies, like those in which we invest, could experience deterioration or limited growth from current levels, which could ultimately lead to difficulty in meeting their debt service requirements, to an increase in defaults on our debt investments or in realized losses on our investments and to difficulty in maintaining historical dividend payment rates and unrealized appreciation on our equity investments. Consequently, we can provide no assurance that the performance of certain portfolio companies will not be negatively impacted by future economic cycles or other conditions, which could also have a negative impact on our future results.

DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS

Comparison of the three months ended September 30, 2022 and September 30, 2021

Set forth below is a comparison of the results of operations, and a reconciliation of net investment income to distributable net investment income, for the three months ended September 30, 2022 and September 30, 2021.

			Three Months Ended September 30,												Net Change
			2022						2021						Amount						%
			(dollars in thousands)
Total investment income			$	98,387					$	76,779					$	21,608					28		%
Total expenses			(35,939)						(27,475)						(8,464)						31		%
Net investment income			62,448						49,304						13,144						27		%
Net realized gain from investments			5,031						8,305						(3,274)						NM
Net unrealized appreciation (depreciation) from investments			(10,081)						38,631						(48,712)						NM
Income tax provision			(2,060)						(12,284)						10,224						NM
Net increase in net assets resulting from operations			$	55,338					$	83,956					$	(28,618)					(34)		%

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			Three Months Ended September 30,												Net Change
			2022						2021						Amount						%
			(dollars in thousands, except per share amounts)
Net investment income			$	62,448					$	49,304					$	13,144					27		%
Share‑based compensation expense			3,617						2,869						748						26		%
Deferred compensation benefit			(298)						(22)						(276)						NM
Distributable net investment income (a)			$	65,767					$	52,151					$	13,616					26		%
Net investment income per share—Basic and diluted			$	0.83					$	0.71					$	0.12					17		%
Distributable net investment income per share—Basic and diluted (a)			$	0.88					$	0.76					$	0.12					16		%

____________________

NM    Net change % not meaningful

(a)Distributable net investment income is net investment income as determined in accordance with U.S. GAAP, excluding the impacts of share-based compensation expense and deferred compensation expense or benefit. We believe presenting distributable net investment income and the related per share amounts is useful and appropriate supplemental disclosure for analyzing our financial performance since share-based compensation does not require settlement in cash and deferred compensation expense or benefit does not result in a net cash impact to Main Street upon settlement. However, distributable net investment income is a non-U.S. GAAP measure and should not be considered as a replacement for net investment income or other earnings measures presented in accordance with U.S. GAAP and should be reviewed only in connection with such U.S. GAAP measures in analyzing our financial performance. A reconciliation of net investment income in accordance with U.S. GAAP to distributable net investment income is detailed in the table above.

Investment Income

Total investment income for the three months ended September 30, 2022 was $98.4 million, a 28% increase from the $76.8 million of total investment income for the corresponding period of 2021. The following table provides a summary of the changes in the comparable period activity.

			Three Months Ended September 30,												Net Change
			2022						2021						Amount						%
			(dollars in thousands)
Interest income			$	75,023					$	50,468					$	24,555					49		%	(a)
Dividend income			19,424						23,012						(3,588)						(16)		%	(b)
Fee income			3,940						3,299						641						19		%	(c)
Total investment income			$	98,387					$	76,779					$	21,608					28		%	(d)

____________________

(a)The increase in interest income was primarily due to (i) higher average levels of Investment Portfolio debt investments primarily from (a) net origination activity in the fourth quarter of 2021 of $209.7 million and $290.4 million in our LMM and Private Loan portfolios, respectively, and (b) net origination activity of $136.9 million and $360.8 million in our LMM and Private Loan portfolios, respectively, for the nine months ended September 30, 2022 and (ii) an increase in floating interest rates on Investment Portfolio debt investments based upon the increase in market index rates to which such floating interest rates are indexed. These increases were partially offset by a $3.3 million decrease in accelerated, prepayment, repricing and other activity related to certain investment portfolio debt investments.

(b)The decrease in dividend income from Investment Portfolio equity investments was primarily a result of a $4.7 million decrease related to dividend income considered to be less consistent or non-recurring, partially offset by continued strong dividend income from a variety of portfolio companies and the improved operating results, financial condition and liquidity positions of certain of our portfolio companies.

(c)The increase in fee income was primarily related to a $1.5 million increase related to higher originations of Investment Portfolio investments as discussed above, partially offset by a $0.8 million decrease from refinancing and prepayment of debt investments.

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(d)The increase in total investment income includes a net reduction of $8.0 million in the impact of certain income considered less consistent or non-recurring, including a $4.7 million decrease in dividend income and a $3.3 million decrease in total accelerated prepayment, repricing and other activity related to certain Investment Portfolio debt investments.

Expenses

Total expenses for the three months ended September 30, 2022 were $35.9 million, a 31% increase from the $27.5 million in the corresponding period of 2021. The following table provides a summary of the changes in the comparable period activity.

			Three Months Ended September 30,												Net Change
			2022						2021						Amount						%
			(dollars in thousands)
Cash compensation			$	10,702					$	9,599					$	1,104					11		%	(a)
Deferred compensation plan expense (benefit)			(298)						(22)						(276)						NM			(b)
Compensation			10,404						9,576						828						9		%
General and administrative			4,018						3,047						971						32		%
Interest			21,234						14,711						6,523						44		%	(c)
Share-based compensation			3,617						2,869						748						26		%
Gross expenses			39,273						30,204						9,070						30		%
Expenses allocated to the External Investment Manager			(3,334)						(2,728)						(606)						22		%
Total expenses			$	35,939					$	27,476					$	8,464					31		%

____________________

(a)The increase in cash compensation was primarily related to increased headcount, base compensation rates and incentive compensation accruals.

(b)The change in the non-cash deferred compensation plan expense was due to the comparable period reduction to compensation expense resulting from a decrease in the fair value of deferred compensation plan assets and corresponding liabilities of the Main Street Capital Corporation Deferred Compensation plan (see “Related Party Transactions and Agreements” below) (the “Deferred Compensation Plan”) in the third quarter of 2022 compared to an increase in such fair values in the corresponding period of 2021.

(c)The increase in interest expense was primarily related to (i) increased borrowings to support our investment activity, including borrowings under our multi-year revolving credit facility (our “Credit Facility”) and an aggregate of $200.0 million in principal amount of our 3.00% Notes (as defined in “—Liquidity and Capital Resources—Capital Resources” below) issued in October 2021 and (ii) the increased interest rate under our Credit Facility as a result of increases to market index rates.

Net Investment Income

Net investment income for the three months ended September 30, 2022 increased 27% to $62.4 million, or $0.83 per share, compared to net investment income of $49.3 million, or $0.71 per share, for the corresponding period of 2021. The increase in net investment income was principally attributable to the increase in total investment income, partially offset by higher operating expenses, both as discussed above. The increase in net investment income per share reflects these changes and the impact of the increase in weighted average shares outstanding for the three months ended September 30, 2022, primarily due to (i) shares issued through our our public offering in August 2022 and our ATM Program (as defined in “—Liquidity and Capital Resources—Capital Resources” below), (ii) shares issued through our equity incentive plans and (iii) shares issued through our dividend reinvestment plan, in each case over the last twelve months. The increase in net investment income on a per share basis includes a $0.12 per share decrease in investment income considered less consistent or non-recurring, as discussed above.

Distributable Net Investment Income

Distributable net investment income for the three months ended September 30, 2022 increased 26% to $65.8 million, or $0.88 per share, compared with $52.2 million, or $0.76 per share, in the corresponding period of 2021. The

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increase in distributable net investment income was primarily due to the increased level of total investment income, partially offset by higher operating expenses, excluding the impact of share-based compensation expense and deferred compensation expense (benefit), both as discussed above. The increase in distributable net investment income per share reflects the net impact of the increase in weighted average shares outstanding for the three months ended September 30, 2022, primarily due to (i) shares issued through our our public offering in August 2022 and our ATM Program, (ii) shares issued through our equity incentive plans and (iii) shares issued through our dividend reinvestment plan, in each case over the last twelve months. The increase in distributable net investment income on a per share basis includes a $0.12 per share decrease in investment income considered less consistent or non-recurring, as discussed above.

Net Realized Gain (Loss) from Investments

The following table provides a summary of the primary components of the total net realized gain on investments of $5.0 million for the three months ended September 30, 2022:

			Three Months Ended September 30, 2022
			Full Exits												Partial Exits												Restructures												Other (a)						Total
			Net Gain/(Loss)						# of Investments						Net Gain/(Loss)						# of Investments						Net Gain/(Loss)						# of Investments						Net Gain/(Loss)						Net Gain/(Loss)
			(dollars in thousands)
LMM portfolio			$	—					—						$	—					—						$	(5,822)					1						$	—					$	(5,822)
Private Loan portfolio			8,855						3						—						—						—						—						257						9,112
Middle Market portfolio			1,038						1						—						—						—						—						153						1,191
Other Portfolio			—						—						550						1						—						—						—						550
Short-term portfolio			—						—						—						—						—						—						—						—
Total net realized gain/(loss)			$	9,893					4						$	550					1						$	(5,822)					1						$	410					$	5,031

____________________

(a)Other activity includes realized gains and losses from transactions involving eight portfolio companies which are not considered to be significant individually or in the aggregate.

Net Unrealized Appreciation (Depreciation)

The following table provides a summary of the total net unrealized depreciation of $10.1 million for the three months ended September 30, 2022:

			Three Months Ended September 30, 2022
			LMM(a)						Private Loan						Middle Market						Other						Total
			(dollars in millions)
Accounting reversals of net unrealized (appreciation) depreciation recognized in prior periods due to net realized (gains / income) losses recognized during the current period			$	5.8					$	(9.0)					$	(1.0)					$	(0.6)					$	(4.8)
Net unrealized appreciation (depreciation) relating to portfolio investments			4.1						1.6						(8.6)						(2.4)			(b)			(5.3)
Total net unrealized appreciation (depreciation) relating to portfolio investments			$	9.9					$	(7.4)					$	(9.6)					$	(3.0)					$	(10.1)

____________________

(a)Includes unrealized appreciation on 28 LMM portfolio investments and unrealized depreciation on 28 LMM portfolio investments.

(b)Other includes (i) $5.8 million of unrealized depreciation relating to the External Investment Manager and (ii) $0.3 million of unrealized depreciation relating to the assets of the Deferred Compensation Plan, partially offset by $3.6 million of net unrealized appreciation relating to the Other Portfolio.

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Income Tax Benefit (Provision)

The income tax provision for the three months ended September 30, 2022 of $2.1 million principally consisted of (i) a current tax provision of $1.6 million, related to a $1.0 million provision for excise tax on our estimated undistributed taxable income and a $0.6 million provision for current U.S. federal and state income taxes and (ii) a deferred tax provision of $0.5 million, which is primarily the result of the net activity relating to our portfolio investments held in our Taxable Subsidiaries, including changes in loss carryforwards, changes in net unrealized appreciation/depreciation and other temporary book-tax differences. The income tax provision for the three months ended September 30, 2021 of $12.3 million principally consisted of (i) a deferred tax provision of $11.3 million, and (ii) a current tax provision of $1.0 million related to a $0.9 million provision for current U.S. federal and state income taxes, and a $0.1 million provision for excise tax on our estimated undistributed taxable income.

Net Increase in Net Assets Resulting from Operations

The net increase in net assets resulting from operations for the three months ended September 30, 2022 was $55.3 million, or $0.74 per share, compared with $84.0 million, or $1.22 per share, during the three months ended September 30, 2021. The tables above provide a summary of the reasons for the change in net increase in net assets resulting from operations for the three months ended September 30, 2022 as compared to the three months ended September 30, 2021.

Comparison of the nine months ended September 30, 2022 and September 30, 2021

Set forth below is a comparison of the results of operations, and a reconciliation of net investment income to distributable net investment income, for the nine months ended September 30, 2022 and September 30, 2021.

			Nine Months Ended September 30,												Net Change
			2022						2021						Amount						%
			(dollars in thousands)
Total investment income			$	262,981					$	206,881					$	56,100					27		%
Total expenses			(93,597)						(75,424)						(18,173)						24		%
Net investment income			169,384						131,457						37,927						29		%
Net realized gain from investments			3,302						10,575						(7,273)						NM
Net unrealized appreciation (depreciation) from investments			(19,922)						117,072						(136,994)						NM
Income tax provision			(17,477)						(22,691)						5,214						NM
Net increase in net assets resulting from operations			$	135,287					$	236,413					$	(101,126)					(43)		%

			Nine Months Ended September 30,												Net Change
			2022						2021						Amount						%
			(dollars in thousands, except per share amounts)
Net investment income			$	169,384					$	131,457					$	37,927					29		%
Share‑based compensation expense			10,031						7,961						2,070						26		%
Deferred compensation expense (benefit)			(1,899)						706						(2,605)						NM
Distributable net investment income (a)			$	177,516					$	140,124					$	37,392					27		%
Net investment income per share—Basic and diluted			$	2.31					$	1.92					$	0.39					20		%
Distributable net investment income per share—Basic and diluted (a)			$	2.42					$	2.04					$	0.38					19		%

____________________

NM    Net change % not meaningful

(a)Distributable net investment income is net investment income as determined in accordance with U.S. GAAP, excluding the impacts of share-based compensation expense and deferred compensation expense or benefit. We believe presenting distributable net investment income and the related per share amounts is useful and appropriate supplemental disclosure for analyzing our financial performance since share-based compensation does not require settlement in cash and deferred compensation expense or benefit does not result in a net cash impact to Main Street

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upon settlement. However, distributable net investment income is a non-U.S. GAAP measure and should not be considered as a replacement for net investment income or other earnings measures presented in accordance with U.S. GAAP and should be reviewed only in connection with such U.S. GAAP measures in analyzing our financial performance. A reconciliation of net investment income in accordance with U.S. GAAP to distributable net investment income is detailed in the table above.

Investment Income

Total investment income for the nine months ended September 30, 2022 was $263.0 million, a 27% increase from the $206.9 million of total investment income for the corresponding period of 2021. The following table provides a summary of the changes in the comparable period activity.

			Nine Months Ended September 30,												Net Change
			2022						2021						Amount						%
			(dollars in thousands)
Interest income			$	198,446					$	139,882					$	58,564					42		%	(a)
Dividend income			53,959						59,328						(5,369)						(9)		%	(b)
Fee income			10,576						7,671						2,905						38		%	(c)
Total investment income			$	262,981					$	206,881					$	56,100					27		%	(d)

____________________

(a)The increase in interest income was primarily due to (i) higher average levels of Investment Portfolio debt investments primarily from (a) net origination activity in the fourth quarter of 2021 of $209.7 million and $290.4 million in our LMM and Private Loan portfolios, respectively, and (b) net origination activity of $136.9 million and $360.8 million in our LMM and Private Loan portfolios, respectively, for the nine months ended September 30, 2022 and (ii) an increase in floating interest rates on Investment Portfolio debt investments based upon the increases in market index rates to which such floating interest rates are indexed. These increases were partially offset by a $0.3 million decrease in accelerated, prepayment, repricing and other activity related to certain investment portfolio debt investments.

(b)The decrease in dividend income from Investment Portfolio equity investments was primarily a result of an $11.3 million decrease related to dividend income considered to be less consistent or non-recurring, partially offset by growth in dividend income from a variety of portfolio companies resulting from the improved operating results, financial condition and liquidity positions of certain of our portfolio companies.

(c)The increase in fee income was primarily related to (i) a $2.7 million increase related to higher originations of Investment Portfolio investments as discussed above and (ii) a $0.2 million increase from refinancing and prepayment of debt investments.

(d)The increase in total investment income includes a net reduction of $11.1 million in the impact of certain income considered less consistent or non-recurring, including (i) an $11.3 million decrease in dividend income and (ii) a $0.3 million decrease in accelerated prepayment, repricing and other activity related to certain Investment Portfolio debt investments.

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Expenses

Total expenses for the nine months ended September 30, 2022 were $93.6 million, a 24% increase from the $75.4 million in the corresponding period of 2021. The following table provides a summary of the changes in the comparable period activity.

			Nine Months Ended September 30,												Net Change
			2022						2021						Amount						%
			(dollars in thousands)
Cash compensation			$	28,379					$	22,084					$	6,295					29		%	(a)
Deferred compensation plan expense (benefit)			(1,899)						706						(2,605)						(369)		%	(b)
Compensation			26,480						22,790						3,690						16		%
General and administrative			11,483						9,439						2,044						22		%
Interest			55,216						42,914						12,302						29		%	(c)
Share-based compensation			10,031						7,961						2,070						26		%
Gross expenses			103,209						83,104						20,105						24		%
Expenses allocated to the External Investment Manager			(9,613)						(7,680)						(1,933)						25		%
Total expenses			$	93,596					$	75,424					$	18,172					24		%

____________________

(a)The increase in compensation expense was primarily related to increased headcount, base compensation rates and incentive compensation accruals.

(b)The change in the non-cash deferred compensation plan expense was due to the comparable period reduction to compensation expense resulting from a decrease in the fair value of Deferred Compensation Plan assets and corresponding liabilities in the third quarter of 2022 compared to an increase in such fair values in the corresponding period of 2021.

(c)The increase in interest expense was primarily related to (i) increased borrowings to support our investment activity, including borrowings under our Credit Facility and an aggregate of $200.0 million in principal amount of our 3.00% Notes issued in October 2021 and (ii) the increased interest rate under our Credit Facility as a result of increases to market index rates.

Net Investment Income

Net investment income for the nine months ended September 30, 2022 increased 29% to $169.4 million, or $2.31 per share, compared to net investment income of $131.5 million, or $1.92 per share, for the corresponding period of 2021. The increase in net investment income was principally attributable to the increase in total investment income, partially offset by higher operating expenses, both as discussed above. The increase in net investment income per share reflects these changes and the impact of the increase in weighted average shares outstanding for the nine months ended September 30, 2022, primarily due to (i) shares issued through our our public offering in August 2022 and our ATM Program, (ii) shares issued through our equity incentive plans and (iii) shares issued through our dividend reinvestment plan, in each case over the last twelve months. The increase in net investment income on a per share basis includes (i) a $0.17 per share decrease in investment income considered less consistent or non-recurring and (ii) a decrease in compensation expense of $0.04 per share resulting from the comparable period difference in the fair value of Deferred Compensation Plan assets and corresponding liabilities, both of which are discussed above.

Distributable Net Investment Income

Distributable net investment income for the nine months ended September 30, 2022 increased 27% to $177.5 million, or $2.42 per share, compared with $140.1 million, or $2.04 per share, in the corresponding period of 2021. The increase in distributable net investment income was primarily due to the increased level of total investment income, partially offset by higher operating expenses, excluding the impact of share-based compensation expense and deferred compensation expense (benefit), both as discussed above. The increase in distributable net investment income per share reflects the net impact of the increase in weighted average shares outstanding for the nine months ended September 30, 2022, primarily due to (i) shares issued through our our public offering in August 2022 and our ATM Program, (ii) shares issued through our equity incentive plans and (iii) shares issued through our dividend reinvestment plan, in each

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case over the last twelve months. The increase in distributable net investment income on a per share basis includes a $0.17 per share decrease in investment income considered less consistent or non-recurring, as discussed above.

Net Realized Gain (Loss) from Investments

The following table provides a summary of the primary components of the total net realized gain on investments of $3.3 million for the nine months ended September 30, 2022:

			Nine Months Ended September 30, 2022
			Full Exits												Partial Exits												Restructures												Other (a)						Total
			Net Gain/(Loss)						# of Investments						Net Gain/(Loss)						# of Investments						Net Gain/(Loss)						# of Investments						Net Gain/(Loss)						Net Gain/(Loss)
			(dollars in thousands)
LMM portfolio			$	—					—						$	—					—						$	(5,822)					1						$	(458)					$	(6,280)
Private Loan portfolio			10,415						4						—						—						—						—						441						10,856
Middle Market portfolio			(5,031)						2						—						—						—						—						153						(4,878)
Other Portfolio			—						—						3,119						2						—						—						441						3,560
Short-term portfolio			—						—						—						—						—						—						44						44
Total net realized gain/(loss)			$	5,384					6						$	3,119					2						$	(5,822)					1						$	621					$	3,302

____________________

(a)Other activity includes realized gains and losses from transactions involving 12 portfolio companies which are not considered to be significant individually or in the aggregate.

Net Unrealized Appreciation (Depreciation)

The following table provides a summary of the total net unrealized depreciation of $19.9 million for the nine months ended September 30, 2022:

			Nine Months Ended September 30, 2022
			LMM(a)						Private Loan						Middle Market						Other									Total
			(dollars in millions)
Accounting reversals of net unrealized (appreciation) depreciation recognized in prior periods due to net realized (gains / income) losses recognized during the current period			$	6.8					$	(11.5)					$	4.9					$	(3.3)								$	(3.1)
Net unrealized appreciation (depreciation) relating to portfolio investments			49.8						(18.8)						(24.3)						(23.5)			(b)						(16.8)
Total net unrealized appreciation (depreciation) relating to portfolio investments			$	56.6					$	(30.3)					$	(19.4)					$	(26.8)								$	(19.9)

____________________

(a)Includes unrealized appreciation on 34 LMM portfolio investments and unrealized depreciation on 31 LMM portfolio investments.

(b)Other includes (i) $27.9 million of unrealized depreciation relating to the External Investment Manager and (ii) $2.2 million of net unrealized depreciation relating to the assets of the Deferred Compensation Plan, partially offset by $6.6 million of net unrealized appreciation relating to the Other Portfolio.

Income Tax Benefit (Provision)

The income tax provision for the nine months ended September 30, 2022 of $17.5 million principally consisted of (i) a deferred tax provision of $13.8 million, which is primarily the result of the net activity relating to our portfolio investments held in our Taxable Subsidiaries, including changes in loss carryforwards, changes in net unrealized appreciation/depreciation and other temporary book-tax differences and (ii) a current tax provision of $3.7 million

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related to a $2.4 million provision for excise tax on our estimated undistributed taxable income and a $1.3 million provision for current U.S. federal and state income taxes. The income tax provision for the nine months ended September 30, 2021 of $22.7 million principally consisted of (i) a deferred tax provision of $20.4 million and (ii) a current tax provision of $2.2 million primarily related to a $1.6 million provision for current U.S. federal and state income taxes and a $0.6 million provision for excise tax in our estimated undistributed taxable income.

Net Increase in Net Assets Resulting from Operations

The net increase in net assets resulting from operations for the nine months ended September 30, 2022 was $135.3 million, or $1.84 per share, compared with $236.4 million, or $3.45 per share, during the nine months ended September 30, 2021. The tables above provide a summary of the reasons for the change in net increase in net assets resulting from operations for the nine months ended September 30, 2022 as compared to the nine months ended September 30, 2021.

Liquidity and Capital Resources

This “Liquidity and Capital Resources” section should be read in conjunction with the “Economic Update” section above.

Cash Flows

For the nine months ended September 30, 2022, we realized a net increase in cash and cash equivalents of $28.5 million, which is the result of $285.9 million of cash provided by our financing activities, partially offset by $257.3 million of cash used in our operating activities.

The $257.3 million of cash used in our operating activities resulted primarily from (i) cash uses totaling $911.3 million for the funding of new and follow-on portfolio company investments and settlement of accruals for portfolio investments existing as of December 31, 2021 and (ii) cash payments of $18.8 million related to changes in other assets and liabilities, partially offset by (i) cash proceeds totaling $506.0 million from the sales and repayments of debt investments and sales of and return on capital from equity investments and (ii) cash flows that we generated from the operating profits earned totaling $166.7 million, which is our distributable net investment income, excluding the non-cash effects of the accretion of unearned income, payment-in-kind interest income, cumulative dividends and the amortization expense for deferred financing costs.

The $285.9 million of cash provided by our financing activities principally consisted of (i) $194.5 million in net cash proceeds from equity offerings from our ATM Program and Equity Offering (both as described below) and direct stock purchase plan and (ii) $241.0 million in net proceeds from the Credit Facility, partially offset by (i) $143.1 million in cash dividends paid to stockholders and (ii) $4.9 million for purchases of vested restricted stock from employees to satisfy their tax withholding requirements upon the vesting of such restricted stock.

Capital Resources

As of September 30, 2022, we had $61.2 million in cash and cash equivalents and $359.0 million of unused capacity under the Credit Facility which we maintain to support our investment and operating activities. As of September 30, 2022, our net asset value totaled $1,979.4 million, or $25.94 per share.

The Credit Facility provides additional liquidity to support our investment and operational activities. As of September 30, 2022, the Credit Facility included total commitments of $920.0 million from a diversified group of 18 lenders, held a maturity date in August 2027 and contained an accordion feature with the right to request an increase in commitments under the facility from new and existing lenders on the same terms and conditions as the existing commitments up to a total of $1.4 billion. As of September 30, 2022, borrowings under the Credit Facility bore interest, subject to our election and resetting on a monthly basis on the first of each month, on a per annum basis at a rate equal to the applicable SOFR rate plus an applicable credit spread adjustment of 0.10% plus (i) 1.875% (or the applicable Prime Rate plus 0.875%) as long as we meet certain agreed upon excess collateral and maximum leverage requirements or (ii) 2.0% (or the applicable Prime Rate plus 1.0%) otherwise. We pay unused commitment fees of 0.25% per annum on the unused lender commitments under the Credit Facility. The Credit Facility is secured by a first lien on the assets of MSCC and its subsidiaries, excluding the equity ownership or assets of the Funds and the External Investment Manager. As of September 30, 2022, the Credit Facility contained certain affirmative and negative covenants, including but not limited to: (i) maintaining minimum liquidity, (ii) maintaining an interest coverage ratio of at least 2.0 to 1.0, (iii) maintaining a 1940 Act asset coverage ratio of at least 1.5 to 1.0, (iv) maintaining a minimum tangible net worth and

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(v) maintaining a minimum asset coverage ratio of 200% with respect to the consolidated assets (with certain limitations on the contribution of equity in financing subsidiaries as specified therein) of MSCC and the guarantors under the Credit Facility to the secured debt of MSCC and the guarantors. As of September 30, 2022, we had $561.0 million in borrowings outstanding under the Credit Facility, the interest rate on the Credit Facility was 4.5% and we were in compliance with all financial covenants of the Credit Facility.

Through the Funds, we have the ability to issue SBIC debentures guaranteed by the SBA at favorable interest rates and favorable terms and conditions. Under existing SBIC regulations, SBA-approved SBICs under common control have the ability to issue debentures guaranteed by the SBA up to a regulatory maximum amount of $350.0 million. Under existing SBA-approved commitments, we had $350.0 million of outstanding SBIC debentures guaranteed by the SBA as of September 30, 2022 through our wholly-owned SBICs, which bear a weighted-average annual fixed interest rate of 2.9%, paid semiannually, and mature ten years from issuance. The first maturity related to our SBIC debentures occurs in 2023, and the weighted-average remaining duration is 5.4 years as of September 30, 2022. Debentures guaranteed by the SBA have fixed interest rates that equal prevailing 10-year Treasury Note rates plus a market spread and have a maturity of ten years with interest payable semiannually. The principal amount of the debentures is not required to be paid before maturity, but may be pre-paid at any time with no prepayment penalty. We expect to maintain SBIC debentures under the SBIC program in the future, subject to periodic repayments and borrowings, in an amount up to the regulatory maximum amount for affiliated SBIC funds.

In November 2017, we issued $185.0 million in aggregate principal amount of 4.50% unsecured notes due December 1, 2022 (the “4.50% Notes”) at an issue price of 99.16%. The 4.50% Notes are unsecured obligations and rank pari passu with our current and future unsecured indebtedness; senior to any of our future indebtedness that expressly provides it is subordinated to the 4.50% Notes; effectively subordinated to all of our existing and future secured indebtedness, to the extent of the value of the assets securing such indebtedness, including borrowings under our Credit Facility; and structurally subordinated to all existing and future indebtedness and other obligations of any of our subsidiaries, including without limitation, the indebtedness of the Funds. The 4.50% Notes may be redeemed in whole or in part at any time at our option subject to certain make-whole provisions. The 4.50% Notes bear interest at a rate of 4.50% per year payable semiannually on June 1 and December 1 of each year. We may from time to time repurchase the 4.50% Notes in accordance with the 1940 Act and the rules promulgated thereunder. As of September 30, 2022, the outstanding principal balance of the 4.50% Notes was $185.0 million.

The indenture governing the 4.50% Notes (the “4.50% Notes Indenture”) contains certain covenants, including covenants requiring our compliance with (regardless of whether we are subject to) the asset coverage requirements set forth in Section 18(a)(1)(A) as modified by Section 61(a)(1) of the 1940 Act, as well as covenants requiring us to provide financial information to the holders of the 4.50% Notes and the trustee if we cease to be subject to the reporting requirements of the Exchange Act. These covenants are subject to limitations and exceptions that are described in the 4.50% Notes Indenture. As of September 30, 2022, we were in compliance with these covenants.

In April 2019, we issued $250.0 million in aggregate principal amount of 5.20% unsecured notes due May 1, 2024 (the “5.20% Notes”) at an issue price of 99.125%. Subsequently, in December 2019, we issued an additional $75.0 million in aggregate principal amount of the 5.20% Notes at an issue price of 105.0%. Also, in July 2020, we issued an additional $125.0 million in aggregate principal amount of the 5.20% Notes at an issue price of 102.674%. The 5.20% Notes issued in December 2019 and July 2020 have identical terms as, and are a part of a single series with, the 5.20% Notes issued in April 2019. The aggregate net proceeds from the 5.20% Notes Notes issuances were used to repay a portion of the borrowings outstanding under the Credit Facility. The 5.20% Notes Notes are unsecured obligations and rank pari passu with our current and future unsecured indebtedness; senior to any of our future indebtedness that expressly provides it is subordinated to the 5.20% Notes; effectively subordinated to all of our existing and future secured indebtedness, to the extent of the value of the assets securing such indebtedness, including borrowings under our Credit Facility; and structurally subordinated to all existing and future indebtedness and other obligations of any of our subsidiaries, including without limitation, the indebtedness of the Funds. The 5.20% Notes may be redeemed in whole or in part at any time at our option subject to certain make-whole provisions. The 5.20% Notes bear interest at a rate of 5.20% per year payable semiannually on May 1 and November 1 of each year. We may from time to time repurchase the 5.20% Notes in accordance with the 1940 Act and the rules promulgated thereunder. As of September 30, 2022, the outstanding principal balance of the 5.20% Notes was $450.0 million.

The indenture governing the 5.20% Notes (the “5.20% Notes Indenture”) contains certain covenants, including covenants requiring our compliance with (regardless of whether we are subject to) the asset coverage requirements set forth in Section 18(a)(1)(A) as modified by Section 61(a)(1) of the 1940 Act, as well as covenants requiring us to provide financial information to the holders of the 5.20% Notes and the trustee if we cease to be subject to the reporting

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requirements of the Exchange Act. These covenants are subject to limitations and exceptions that are described in the 5.20% Notes Indenture. As of September 30, 2022, we were in compliance with these covenants.

In January 2021, we issued $300.0 million in aggregate principal amount of 3.00% unsecured notes due July 14, 2026 (the “3.00% Notes”) at an issue price of 99.004%. In October 2021, we issued an additional $200.0 million in aggregate principal amount of the 3.00% Notes at an issue price of 101.741%. The 3.00% Notes issued in October 2021 have identical terms as, and are a part of a single series with, the 3.00% Notes issued in January 2021. The 3.00% Notes are unsecured obligations and rank pari passu with our current and future unsecured indebtedness; senior to any of our future indebtedness that expressly provides it is subordinated to the 3.00% Notes; effectively subordinated to all of our existing and future secured indebtedness, to the extent of the value of the assets securing such indebtedness, including borrowings under our Credit Facility; and structurally subordinated to all existing and future indebtedness and other obligations of any of our subsidiaries, including without limitation, the indebtedness of the Funds. The 3.00% Notes may be redeemed in whole or in part at any time at our option subject to certain make whole provisions. The 3.00% Notes bear interest at a rate of 3.00% per year payable semiannually on January 14 and July 14 of each year. We may from time to time repurchase the 3.00% Notes in accordance with the 1940 Act and the rules promulgated thereunder. As of September 30, 2022, the outstanding principal balance of the 3.00% Notes was $500.0 million.

The indenture governing the 3.00% Notes (the “3.00% Notes Indenture”) contains certain covenants, including covenants requiring our compliance with (regardless of whether we are subject to) the asset coverage requirements set forth in Section 18(a)(1)(A) as modified by Section 61(a)(1) of the 1940 Act, as well as covenants requiring us to provide financial information to the holders of the 3.00% Notes and the trustee if we cease to be subject to the reporting requirements of the Exchange Act. These covenants are subject to limitations and exceptions that are described in the 3.00% Notes Indenture. As of September 30, 2022, we were in compliance with these covenants.

We maintain a program with certain selling agents through which we can sell shares of our common stock by means of at-the-market offerings from time to time (the “ATM Program”). During the nine months ended September 30, 2022, we sold 3,429,904 shares of our common stock at a weighted-average price of $40.99 per share and raised $140.6 million of gross proceeds under the ATM Program. Net proceeds were $139.2 million after commissions to the selling agents on shares sold and offering costs. As of September 30, 2022, sales transactions representing 73,124 shares had not settled and are not included in shares issued and outstanding on the face of the Consolidated Balance Sheets but are included in the weighted average shares outstanding in the Consolidated Statements of Operations and in the shares used to calculate the net asset value per share. In March 2022, we entered into new distribution agreements to sell up to 15,000,000 shares through the ATM Program. As of September 30, 2022, 12,440,162 shares remained available for sale under the ATM Program.

During the year ended December 31, 2021, we sold 2,332,795 shares of our common stock at a weighted-average price of $42.71 per share and raised $99.6 million of gross proceeds under the ATM Program. Net proceeds were $98.4 million after commissions to the selling agents on shares sold and offering costs. As of December 31, 2021, sales transactions representing 36,136 shares had not settled and are not included in shares issued and outstanding on the face of the Consolidated Balance Sheets but are included in the weighted average shares outstanding in the Consolidated Statements of Operations and in the shares used to calculate the net asset value per share.

During August 2022, we completed a public equity offering (the “Equity Offering”) of 1,345,500 shares of common stock at a public offering price of $42.85 per share, including the underwriters’ full exercise of their option to purchase 175,500 additional shares, resulting in total net proceeds, including exercise of the underwriters’ option to purchase additional shares and after deducting underwriting discounts and estimated offering expenses payable by us, of approximately $55.1 million.

We anticipate that we will continue to fund our investment activities through existing cash and cash equivalents, cash flows generated through our ongoing operating activities, utilization of available borrowings under our Credit Facility, and a combination of future issuances of debt and equity capital. Our primary uses of funds will be investments in portfolio companies, operating expenses, cash distributions to holders of our common stock and repayments of note and debenture obligations as they come due.

We periodically invest excess cash balances into marketable securities and idle funds investments. The primary investment objective of marketable securities and idle funds investments is to generate incremental cash returns on excess cash balances prior to utilizing those funds for investment in our LMM, Private Loan and Middle Market portfolio investments. Marketable securities and idle funds investments generally consist of debt investments, independently rated debt investments, certificates of deposit with financial institutions, diversified bond funds and publicly traded debt and equity investments. We may also invest in short-term portfolio investments that are atypical of

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our LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital and are more liquid than investments within the other portfolios. Short-term portfolio investments consist primarily of investments in secured debt investments and independently rated debt investments.

If our common stock trades below our net asset value per share, we will generally not be able to issue additional common stock at the market price, unless our stockholders approve such a sale and our Board of Directors makes certain determinations. We did not seek stockholder authorization to sell shares of our common stock below the then current net asset value per share of our common stock at our 2022 annual meeting of stockholders, and have not sought such authorization since 2012, because our common stock price per share has generally traded significantly above the net asset value per share of our common stock since 2011. We would therefore need future approval from our stockholders to issue shares below the then current net asset value per share.

In order to satisfy the Code requirements applicable to a RIC, we intend to distribute to our stockholders, after consideration and application of our ability under the Code to carry forward certain excess undistributed taxable income from one tax year into the next tax year, substantially all of our taxable income.

In addition, as a BDC, we generally are required to meet a coverage ratio, or BDC asset coverage ratio, of total assets to total senior securities, which include borrowings and any preferred stock we may issue in the future, of at least 200% (or 150% if certain requirements are met). In January 2008, we received an exemptive order from the SEC to exclude SBA-guaranteed debt securities issued by the Funds and any other wholly-owned subsidiaries of ours which operate as SBICs from the BDC asset coverage ratio which, in turn, enables us to fund more investments with debt capital. In May 2022, our stockholders also approved the application of the reduced BDC asset coverage ratio. As a result, the BDC asset coverage ratio applicable to us decreased from 200% to 150% effective May 3, 2022. As of September 30, 2022, our BDC asset coverage ratio was 216%.

Although we have been able to secure access to additional liquidity, including through the Credit Facility, public debt issuances, leverage available through the SBIC program and equity offerings, there is no assurance that debt or equity capital will be available to us in the future on favorable terms, or at all.

Recently Issued or Adopted Accounting Standards

From time to time, new accounting pronouncements are issued by the FASB or other standards setting bodies that are adopted by us as of the specified effective date. We believe that the impact of recently issued standards and any that are not yet effective will not have a material impact on our consolidated financial statements upon adoption. For a description of recently issued or adopted accounting standards, see Note B.13 – Recently Issued or Adopted Accounting Standards included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q.

Inflation

Inflation has not historically had a significant effect on our results of operations in any of the reporting periods presented herein. However, our portfolio companies have experienced, specifically including over the last few quarters as a result of the COVID-19 pandemic, recent geopolitical events and the related supply chain and labor issues, and may continue to experience, the increasing impacts of inflation on their operating results, including periodic escalations in their costs for labor, raw materials and third-party services and required energy consumption. These issues and challenges related to inflation are receiving significant attention from our investment teams and the management teams of our portfolio companies as we work to manage these growing challenges. Prolonged or more severe impacts of inflation to our portfolio companies could continue to impact their operating profits and, thereby, increase their borrowing costs, and as a result negatively impact their ability to service their debt obligations and/or reduce their available cash for distributions. In addition, these factors could have a negative impact on the fair value of our investments in these portfolio companies. The combined impacts of these impacts in turn could negatively affect our results of operations.

Off-Balance Sheet Arrangements

We may be a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financial needs of our portfolio companies. These instruments include commitments to extend credit and fund equity capital and involve, to varying degrees, elements of liquidity and credit risk in excess of the amount recognized in the Consolidated Balance Sheets. At September 30, 2022, we had a total of $294.9 million in outstanding commitments comprised of (i) 78 investments with commitments to fund revolving loans that had not been fully drawn or term loans

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with additional commitments not yet funded and (ii) ten investments with equity capital commitments that had not been fully called.

Contractual Obligations

As of September 30, 2022, the future fixed commitments for cash payments in connection with our SBIC debentures, the 4.50% Notes, the 5.20% Notes, the 3.00% Notes and rent obligations under our office lease for each of the next five years and thereafter are as follows (dollars in thousands):

			2022						2023						2024						2025						2026						Thereafter						Total
3.00% Notes due 2026			$	—					$	—					$	—					$	—					$	500,000					$	—					$	500,000
Interest due on 3.00% Notes due 2026			—						15,017						15,000						15,000						15,000						—						60,017
5.20% Notes due 2024			—						—						450,000						—						—						—						450,000
Interest due on 5.20% Notes due 2024			11,700						23,400						11,700						—						—						—						46,800
SBIC debentures			—						16,000						63,800						—						—						270,200						350,000
Interest due on SBIC debentures			—						9,960						8,455						7,228						7,228						15,565						48,436
4.50% Notes due 2022			185,000						—						—						—						—						—						185,000
Interest due on 4.50% Notes due 2022			4,163						—						—						—						—						—						4,163
Operating Lease Obligation (1)			197						804						818						832						846						933						4,430
Total			$	201,060					$	65,181					$	549,773					$	23,060					$	523,074					$	286,698					$	1,648,846

____________________

(1)Operating Lease Obligation means a rent payment obligation under a lease classified as an operating lease and disclosed pursuant to ASC 842, as may be modified or supplemented.

As of September 30, 2022, we had $561.0 million in borrowings outstanding under our Credit Facility, and the Credit Facility is scheduled to mature in August 2027.

Related Party Transactions and Agreements

We have entered into agreements and transactions with the External Investment Manager, MSC Income and the Private Loan Fund, whereby we have made debt and equity investments and receive certain fees, expense reimbursements and investment income. See Note D – External Investment Manager and Note L—Related Party Transactions included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q for additional information regarding these related party transactions.

In addition, we have a deferred compensation plan, whereby non-employee directors and certain key employees may defer receipt of some or all of their cash compensation and directors’ fees, subject to certain limitations. See Note K—Related Party Transactions included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q for additional information regarding the deferred compensation plan.

Recent Developments

In November 2022, we declared a supplemental cash dividend of $0.10 per share payable in December 2022. This supplemental cash dividend is in addition to the previously announced regular monthly cash dividends that we declared for the fourth quarter of 2022 of $0.215 per share for each of October, November and December 2022 or total monthly cash dividends of $0.645 per share for the quarter.

In November 2022, we declared regular monthly dividends of $0.225 per share for each of January, February and March of 2023. These regular monthly dividends equal a total of $0.675 per share for the first quarter of 2022, representing a 4.7% increase from the regular monthly dividends paid in the first quarter of 2022. Including the regular monthly and supplemental dividends declared for the fourth quarter of 2022 and first quarter of 2023 we will have paid $35.795 per share in cumulative dividends since our October 2007 initial public offering.

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Item 3. Quantitative and Qualitative Disclosures about Market Risk

We are subject to financial market risks, including changes in interest rates, and changes in interest rates may affect both our interest expense on the debt outstanding under our Credit Facility and our interest income from portfolio investments. Our risk management systems and procedures are designed to identify and analyze our risk, to set appropriate policies and limits and to continually monitor these risks. Our investment income will be affected by changes in various interest rate indices, including LIBOR, SOFR and Prime rates, to the extent that any debt investments include floating interest rates. See “Risk Factors—Risks Related to our Investments — Changes relating to the LIBOR calculation process, the phase-out of LIBOR and the use of replacement rates for LIBOR may adversely affect the value of our portfolio securities.”, “Risk Factors — Risks Related to our Investments — We are subject to risks associated with the current interest rate environment and changes in interest rates will affect our cost of capital, net investment income and the value of our investments.” and “Risk Factors — Risks Related to Leverage — Because we borrow money, the potential for gain or loss on amounts invested in us is magnified and may increase the risk of investing in us.” included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 for more information regarding risks associated with our debt investments and borrowings that utilize LIBOR, SOFR or Prime as a reference rate.

The majority of our debt investments are made with either fixed interest rates or floating rates that are subject to contractual minimum interest rates for the term of the investment. As of September 30, 2022, 76% of our debt investment portfolio (at cost) bore interest at floating rates, 92% of which were subject to contractual minimum interest rates. As of September 30, 2022, 73% of our debt obligations bore interest at fixed rates. Our interest expense will be affected by changes in the published SOFR rate in connection with our Credit Facility; however, the interest rates on our outstanding SBIC debentures, 4.50% Notes, 5.20% Notes and 3.00% Notes, which collectively comprise the majority of our outstanding debt, are fixed for the life of such debt. As of September 30, 2022, we had not entered into any interest rate hedging arrangements. Due to our limited use of derivatives, we have claimed an exclusion from the definition of the term “commodity pool operator” under the Commodity Exchange Act and, therefore, are not subject to registration or regulation as a pool operator under such Act. The following table shows the approximate annualized increase or decrease in the components of net investment income due to hypothetical base rate changes in interest rates, assuming no changes in our investments and borrowings as of September 30, 2022.

Basis Point Change						Increase (Decrease) in Interest Income						(Increase) Decrease in Interest Expense						Increase (Decrease) in Net Investment Income						Increase (Decrease) in Net Investment Income per Share
						(dollars in thousands, except per share amounts)
(200)						$	(46,228)					$	11,220					$	(35,008)					$	(0.46)
(175)						$	(40,828)					$	9,818					$	(31,010)					$	(0.41)
(150)						$	(35,227)					$	8,415					$	(26,812)					$	(0.35)
(125)						(29,492)						7,013						(22,479)						(0.29)
(100)						(23,687)						5,610						(18,077)						(0.24)
(75)						(17,835)						4,208						(13,627)						(0.18)
(50)						(11,982)						2,805						(9,177)						(0.12)
(25)						(6,130)						1,403						(4,727)						(0.06)
25						5,576						(1,403)						4,173						0.05
50						11,427						(2,805)						8,622						0.11
75						17,280						(4,208)						13,072						0.17
100						23,132						(5,610)						17,522						0.23
125						28,984						(7,013)						21,971						0.29
150						34,837						(8,415)						26,422						0.35
175						40,689						(9,818)						30,871						0.40
200						46,541						(11,220)						35,321						0.46
300						69,951						(16,830)						53,121						0.70
400						93,360						(22,440)						70,920						0.93

Although we believe that this analysis is indicative of the impact of interest rate changes to our Net Investment Income as of September 30, 2022, the analysis does not take into consideration future changes in the credit market, credit quality or other business or economic developments that could affect our Net Investment Income. Accordingly, we can offer no assurances that actual results would not differ materially from the analysis above. The hypothetical results

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assume that all LIBOR, SOFR and Prime Rate changes would be effective on the first day of the period. However, the contractual LIBOR, SOFR and Prime Rate reset dates would vary throughout the period. The majority of our investments are based on contracts which reset quarterly while our Credit Facility resets monthly. The hypothetical results would also be impacted by the changes in the amount of debt outstanding under our Credit Facility (with an increase (decrease) in the debt outstanding under the Credit Facility resulting in an (increase) decrease in the hypothetical interest expense).

Item 4. Controls and Procedures

As of the end of the period covered by this report, we carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer, President, Chief Financial Officer, Chief Compliance Officer and Chief Accounting Officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15 of the Exchange Act). Based on that evaluation, our Chief Executive Officer, President, Chief Financial Officer, Chief Compliance Officer and Chief Accounting Officer have concluded that our current disclosure controls and procedures are effective in timely alerting them of material information relating to us that is required to be disclosed in the reports we file or submit under the Exchange Act. There have been no changes in our internal control over financial reporting that occurred during the quarter ended September 30, 2022 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II—OTHER INFORMATION

Item 1. Legal Proceedings

We may, from time to time, be involved in litigation arising out of our operations in the normal course of business or otherwise. Furthermore, third parties may seek to impose liability on us in connection with the activities of our portfolio companies. While the outcome of any current legal proceedings cannot at this time be predicted with certainty, we do not expect any current matters will materially affect our financial condition or results of operations; however, there can be no assurance whether any pending legal proceedings will have a material adverse effect on our financial condition or results of operations in any future reporting period.

Item 1A. Risk Factors

In addition to the other information set forth in this report, you should carefully consider the risk factors described in Part I, “Item 1A. Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 that we filed with the SEC on February 25, 2022, which could materially affect our business, financial condition and/or operating results. There have been no material changes to the risk factors as previously disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021.

The risks described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 are not the only risks facing us. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially and adversely affect our business, financial condition and/or operating results.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

During the three months ended September 30, 2022, we issued 164,216 shares of our common stock under our dividend reinvestment plan. These issuances were not subject to the registration requirements of the Securities Act of 1933, as amended. The aggregate value of the shares of common stock issued during the three months ended September 30, 2022 under the dividend reinvestment plan was $6.6 million.

Upon vesting of restricted stock awarded pursuant to our employee equity compensation plan, shares may be withheld to meet applicable tax withholding requirements. Any withheld shares are treated as common stock purchases by the Company in our consolidated financial statements as they reduce the number of shares received by employees upon vesting (see “Purchase of vested stock for employee payroll tax withholding” in the Consolidated Statements of Changes in Net Assets for share amounts withheld).

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Item 6. Exhibits

Listed below are the exhibits which are filed as part of this report (according to the number assigned to them in Item 601 of Regulation S-K):

Exhibit Number						Description of Exhibit
31.1						Certification of Chief Executive Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934.
31.2						Certification of Chief Financial Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934.
32.1						Certification of Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350).
32.2						Certification of Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350).
101.INS						Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because XBRL tags are embedded within the Inline XBRL document.
101.SCH						Inline XBRL Taxonomy Extension Schema Document
101.CAL						Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF						Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB						Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE						Inline XBRL Taxonomy Extension Presentation Linkbase Document
104						Cover Page Interactive Data File (embedded within the Inline XBRL document)

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

			Main Street Capital Corporation
			/s/ DWAYNE L. HYZAK
Date: November 4, 2022			Dwayne L. Hyzak
			Chief Executive Officer
			(principal executive officer)
			/s/ JESSE E. MORRIS
Date: November 4, 2022			Jesse E. Morris
			Chief Financial Officer and Chief Operating Officer
			(principal financial officer)
			/s/ LANCE A. PARKER
Date: November 4, 2022			Lance A. Parker
			Vice President and Chief Accounting Officer
			(principal accounting officer)

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