NATURAL GAS SERVICES GROUP INC - Quarter Report: 2008 June (Form 10-Q)

form_10-q.htm

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(X) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2008

( ) 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 1-31398

NATURAL GAS SERVICES GROUP, INC.

(Exact name of registrant as specified in its charter)

Colorado	75-2811855
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)

508 W. Wall St., Ste 550

Midland, Texas 79701

(Address of principal executive offices)

(432) 262-2700

(Registrant’s telephone number, including area code)

2811 SCR1260

Midland, TX 79701

(Former name or former address, if changed since last report)

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 is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer”, “accelerated filer”, and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer o

Accelerated filer x

Non-accelerated filer o

(Do not check if smaller reporting company)

Smaller reporting company 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

APPLICABLE ONLY TO CORPORATE ISSUERS

Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date.

Class		Outstanding at August 07, 2008
Common Stock, $.01 par value		12,090,833

NATURAL GAS SERVICES GROUP, INC.


Part I - FINANCIAL INFORMATION

Item 1. Financial Statements

Unaudited Condensed Consolidated Balance Sheets	Page 1

Unaudited Condensed Consolidated Income Statements	Page 2

Unaudited Condensed Consolidated Statements of Cash Flows	Page 3

Notes to Unaudited Condensed Consolidated Financial Statements	Page 4

Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations	Page 12

Item 3. Quantitative and Qualitative Disclosures about Market Risk	Page 19

Item 4. Controls and Procedures	Page 19

Part II - OTHER INFORMATION

Item 1. Legal Proceedings	Page 20

Item 1A. Risk Factors	Page 20

Item 6. Exhibits	Page 21

Signatures	Page 23

Table of Contents

PART I – FINANCIAL INFORMATION

Item 1. Financial Statements

NATURAL GAS SERVICES GROUP, INC. CONDENSED CONSOLIDATED BALANCE SHEETS (in thousands, except per share amounts) (unaudited)
	December 31,		June 30,
	2007			2008
ASSETS
Current Assets:
Cash and cash equivalents	$	245		$	890
Short-term investments		18,661			6,427
Trade accounts receivable, net of doubtful accounts of $110 and $130, respectively		11,322			10,524
Inventory, net of allowance for obsolescence of $273 and $333, respectively		20,769			30,101
Prepaid income taxes		3,584			282
Prepaid expenses and other		641			83
Total current assets		55,222			48,307

Rental equipment, net of accumulated depreciation of $16,810 and $20,300, respectively		76,025			93,240
Property and equipment, net of accumulated depreciation of $4,792 and $5,203, respectively		8,580			8,910
Goodwill, net of accumulated amortization of $325, both periods		10,039			10,039
Intangibles, net of accumulated amortization of $1,145 and $1,299, respectively		3,324			3,170
Other assets		43			21
Total assets	$	153,233		$	163,687

LIABILITIES AND STOCKHOLDERS' EQUITY

Current Liabilities:
Current portion of long-term debt and subordinated notes	$	4,378		$	3,378
Line of credit		600			—
Accounts payable		4,072			6,856
Accrued liabilities		3,990			5,888
Current income tax liability		3,525			97
Deferred income		81			1,751
Total current liabilities		16,646			17,970

Long term debt, less current portion		9,572			7,883
Deferred income tax payable		12,635			16,198
Other long term debt		—			150
Total liabilities		38,853			42,201

Stockholders’ equity:
Preferred stock, 5,000 shares authorized, no shares issued or outstanding		—			—
Common stock, 30,000 shares authorized, par value $0.01;12,085 and 12,091 shares issued and outstanding, respectively		121			121
Additional paid-in capital		83,460			83,716
Retained earnings		30,799			37,649
Total stockholders' equity		114,380			121,486
Total liabilities and stockholders' equity	$	153,233		$	163,687

See accompanying notes to these condensed consolidated financial statements.

-1-

Table of Contents

NATURAL GAS SERVICES GROUP, INC. CONDENSED CONSOLIDATED INCOME STATEMENTS (in thousands, except earnings per share) (unaudited)
	Three months ended June 30,		Six months ended June 30,
	2007	2008	2007	2008
Revenue:
Sales, net	$10,159	$9,159	$19,665	$18,785
Rental income	7,222	10,095	14,162	19,105
Service and maintenance income	243	224	509	521
Total revenue	17,624	19,478	34,336	38,411

Operating costs and expenses:
Cost of sales, exclusive of depreciation stated separately below	7,292	6,238	13,962	12,631
Cost of rentals, exclusive of depreciation stated separately below	2,989	4,094	5,724	7,498
Cost of service and maintenance, exclusive of depreciation stated separately below	137	152	324	360
Selling, general, and administrative expense	1,262	1,485	2,462	2,835
Depreciation and amortization	1,810	2,364	3,527	4,489
Total operating costs and expenses	13,490	14,333	25,999	27,813

Operating income	4,134	5,145	8,337	10,598

Other income (expense):
Interest expense	(298)	(193)	(598)	(434)
Other income	364	141	716	374
Total other income (expense)	66	(52)	118	(60)

Income before provision for income taxes	4,200	5,093	8,455	10,538
Provision for income taxes	1,554	1,760	3,128	3,688
Net income	$2,646	$3,333	$5,327	$6,850


Earnings per share:
Basic	$0.22	$0.28	$0.44	$0.57
Diluted	$0.22	$0.27	$0.44	$0.56
Weighted average shares outstanding:
Basic	12,063	12,088	12,065	12,087
Diluted	12,091	12,152	12,087	12,150

See accompanying notes to these condensed consolidated financial statements.

-2-

Table of Contents

NATURAL GAS SERVICES GROUP, INC. CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands of dollars) (unaudited)
	Six Months Ended June 30,
	2007	2008
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$5,327	$6,850
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,527	4,489
Deferred taxes	42	3,688
Employee stock options expensed	194	181
Gain on sale of property and equipment	(9)	(14)
Changes in current assets and liabilities:
Trade accounts receivables, net	(995)	798
Inventory, net	(3,114)	(9,332)
Prepaid expenses and other	(107)	558
Accounts payable and accrued liabilities	2,970	4,682
Current income tax liability	468	(220)
Deferred income	464	1,670
Other	4	18
NET CASH PROVIDED BY OPERATING ACTIVITIES	8,771	13,368

CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(9,011)	(21,897)
Purchase of short-term investments	(2,050)	(294)
Redemption of short-term investments	3,000	12,528
Proceeds from sale of property and equipment	34	35
NET CASH USED IN INVESTING ACTIVITIES	(8,027)	(9,628)

CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from other long-term debt	—	150
Proceeds from line of credit	—	500
Repayments of long-term debt	(2,753)	(2,689)
Repayments of line of credit	—	(1,100)
Proceeds from exercise of stock options and warrants	154	44
NET CASH USED IN FINANCING ACTIVITIES	(2,599)	(3,095)

NET CHANGE IN CASH	(1,855)	645

CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	4,391	245
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$2,536	$890
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest paid	$496	$477
Income taxes paid	$2,683	$220

See accompanying notes to these condensed consolidated financial statements.

-3-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(1) Basis of Presentation and Summary of Significant Accounting Policies

The accompanying unaudited condensed consolidated financial statements present the condensed consolidated results of our company taken from our books and records. In our opinion, such information includes all adjustments, consisting of only normal recurring adjustments, which are necessary to make our financial position at June 30, 2008 and December 31, 2007 and the results of our operations for the three month and six month periods ended June 30, 2008 and June 30, 2007 not misleading. As permitted by the rules and regulations of the Securities and Exchange Commission (SEC) the accompanying condensed consolidated financial statements do not include all disclosures normally required by accounting principles generally accepted in the United States of America. These condensed consolidated financial statements should be read in conjunction with the financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2007 on file with the SEC. In our opinion, the condensed consolidated financial statements are a fair presentation of the financial position, results of operations and cash flows for the periods presented.

The results of operations for the six month period ended June 30, 2008 is not necessarily indicative of the results of operations to be expected for the full fiscal year ending December 31, 2008.

Unless otherwise noted, amounts reported in tables are in thousands, except per share data and stock option data.

Short-Term investments

Short-term investments consist primarily of government and corporate bonds with original maturities of ninety days to one year.

Revenue recognition

Revenue from the sales of custom and fabricated compressors, and flare systems is recognized upon shipment of the equipment to customers or when all conditions have been met for title is transferred to the customer. Exchange and rebuild compressor revenue is recognized when both the replacement compressor has been delivered and the rebuild assessment has been completed. Revenue from compressor services is recognized upon providing services to the customer. Maintenance agreement revenue is recognized as services are rendered. Rental revenue is recognized over the terms of the respective rental agreements based upon the classification of the rental agreement. Deferred income represents payments received before a product is shipped. Revenue from the sale of rental units is included in sales revenue when equipment is shipped or title is transferred to the customer.

Recently Issued Accounting Pronouncements

In September 2006, the FASB issued Statement of Financial Accounting Standards (“SFAS”) No. 157, Fair Value Measurements (“SFAS No. 157”), which defines fair value, establishes a framework for measuring fair value in GAAP, and expands disclosures about fair value measurements. This Statement applies under other accounting pronouncements that require or permit fair value measurements and is effective for fiscal years beginning after November 15, 2007. In February 2008, the FASB issued FASB Staff Position No. FAS 157-2, which defers the effective date of SFAS No. 157 for non-financial liabilities, except for items that are recognized or disclosed at fair value in the financial statements on a recurring basis (at least annually) to fiscal years beginning after November 15, 2008 and interim periods within those years. We adopted the required provisions of SFAS No. 157 on January 1, 2008 and the adoption did not have a significant impact on our financial statements. See Note 3 for additional information regarding fair value measurements.

-4-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

In February 2007, the FASB issued SFAS No. 159, The Fair Value Option for Financial Assets and Financial Liabilities-Including an amendment of FASB Statement No. 115 (“SFAS No. 159”). SFAS No. 159 permits entities to measure eligible assets and liabilities at fair value. Unrealized gains and losses on items for which the fair value option has been elected are reported in earnings. SFAS No. 159 is effective for fiscal years beginning after November 15, 2007. We adopted SFAS No. 159 on January 1, 2008 and the adoption did not have a significant impact on our financial statements.

In December 2007, the FASB issued SFAS No. 141(R), Business Combinations (“SFAS No. 141(R)”), which replaces SFAS No. 141, Business Combinations, and requires an acquirer to recognize the assets acquired, the liabilities assumed, and any non-controlling interest in the acquiree at the acquisition date, measured at their fair values as of that date, with limited exceptions. This Statement also requires the acquirer in a business combination achieved in stages to recognize the identifiable assets and liabilities, as well as the non-controlling interest in the acquiree, at the full amounts of their fair values. SFAS No. 141(R) makes various other amendments to authoritative literature intended to provide additional guidance or to confirm the guidance in that literature to that provided in this Statement. This Statement applies prospectively to business combinations for which the acquisition date is on or after the beginning of the first annual reporting period beginning on or after December 15, 2008. We do not expect the adoption of SFAS No. 141(R) will have a significant impact on our financial statements.

In December 2007, FASB issued SFAS No. 160, Non-controlling Interests in Consolidated Financial Statements (“SFAS No. 160”), which amends Accounting Research Bulletin No. 51, Consolidated Financial Statements, to improve the relevance, comparability, and transparency of the financial information that a reporting entity provides in its consolidated financial statements. SFAS No. 160 establishes accounting and reporting standards that require the ownership interests in subsidiaries not held by the parent to be clearly identified, labeled and presented in the consolidated statement of financial position within equity, but separate from the parent’s equity. This statement also requires the amount of consolidated net income attributable to the parent and to the non-controlling interest to be clearly identified and presented on the face of the consolidated statement of income. Changes in a parent’s ownership interest while the parent retains its controlling financial interest must be accounted for consistently, and when a subsidiary is deconsolidated, any retained non-controlling equity investment in the former subsidiary must be initially measured at fair value. The gain or loss on the deconsolidation of the subsidiary is measured using the fair value of any non-controlling equity investment. The Statement also requires entities to provide sufficient disclosures that clearly identify and distinguish between the interests of the parent and the interests of the non-controlling owners. This Statement applies prospectively to all entities that prepare consolidated financial statements and applies prospectively for fiscal years, and interim periods within those fiscal years, beginning on or after December 15, 2008. We do not expect the adoption of SFAS No. 160 will have a significant impact on our financial statements.

(2) Stock-Based Compensation

Effective January 1, 2006, the Company adopted the fair value recognition provisions of SFAS No. 123(R), Share-Based Payment (“SFAS No. 123(R)”) using the modified prospective transition method. In addition, the Securities and Exchange Commission issued Staff Accounting Bulletin No. 107, Share-Based Payment (“SAB No. 107”) in March, 2006, which provides supplemental SFAS No. 123(R) application guidance based on the views of the SEC. Under the modified prospective transition method, compensation cost recognized in the quarterly periods ended June 30, 2007 and 2008 included: (a) compensation cost for all share-based payments granted prior to, but not yet vested as of January 1, 2006, based on the grant date fair value estimated in accordance with the original provisions of SFAS No. 123, and (b) compensation cost for all share-based payments granted beginning January 1, 2006, based on the grant date fair value estimated in accordance with the provisions of SFAS No. 123(R).

-5-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

A summary of option activity under our 1998 Stock Option plan for the six month period ended June 30, 2008 is presented below.

	Number of Stock Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)		Aggregate Intrinsic Value
							(in thousands)
Outstanding, December 31, 2007		167,502	$	11.25		7.77	$	1,401

Granted		55,000		20.17
Exercised		5,833		7.47
Forfeited or expired		4,668		12.11

Outstanding, June 30, 2008		212,001	$	13.65		7.89	$	3,568

Exercisable, June 30, 2008		141,501	$	11.32		7.21	$	2,712

We granted options on January 15, 2008 and March 18, 2008. There were no options granted during the three months ended June 30, 2008. The total intrinsic value, or the difference between the exercise price and the market price on the date of exercise, of options exercised during the six months ended June 30, 2008, was approximately $105,000. The Company received cash of approximately $44,000 and realized an income tax benefit of approximately $31,000 from stock options exercised during the six months ended June 30, 2008.

The following table summarizes information about the options outstanding at June 30, 2008:

		Options Outstanding						Options Exercisable
Range of Exercise Prices		Shares		Weighted Average Remaining Contractual Life (years)		Weighted Average Exercise Price		Shares		Weighted Average Exercise Price

$	0.00 – 5.58		25,000		4.37	$	4.00		25,000	$	4.00

	5.59 – 9.43		60,000		6.97		9.11		60,000		9.11

	9.44 – 15.60		47,001		8.53		14.33		24,001		14.05

	15.61 – 20.48		80,000		9.32		19.67		32,500		19.00

$	0.00 – 20.48		212,001		7.89	$	13.65		141,501	$	11.32

-6-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

The summary of the status of the Company’s unvested stock options as of June 30, 2008 and changes during the six months ended June 30, 2008 is presented below.

Unvested stock options:	Shares		Weighted Average Grant Date Fair Value

Unvested at December 31, 2007		41,000	$	9.19

Granted		55,000		9.89
Vested		22,500		12.65
Forfeited		3,000		5.40

Unvested at June 30, 2008		70,500	$	8.79

As of June 30, 2008, there was approximately $524,000 of unrecognized compensation cost related to unvested options. Such cost is expected to be recognized over a weighted-average period of 1.23 years. Total compensation expense for stock options was $194,000 and $181,000 for the six months ended June 30, 2007 and 2008, respectively. An income tax benefit was recognized from the exercise of stock options of approximately $72,000 and $31,000 for the six months ended June 30, 2007 and 2008, respectively.

(3) Fair Value Measurement

The financial assets of the company measured at fair value on a recurring basis are cash and cash equivalents and short-term investments. Our short-term investments are generally classified within level 1 or level 2 of the fair value hierarchy because they are valued using quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency.

The types of instruments valued based on quoted market prices in active markets include most U.S. government and agency securities and most money market securities. Such instruments are generally classified within level 1 of the fair value hierarchy.

The types of instruments valued based on quoted prices in markets that are not active, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency include most investment-grade corporate bonds, and state, municipal and provincial obligations. Such instruments are generally classified within level 2 of the fair value hierarchy.

Our short-term investments of $6.4 million as of June 30, 2008 are measured at fair value on a recurring basis by level 1 within the fair value hierarchy. As required by SFAS No. 157, these are classified based on the lowest level of input that is significant to the fair value measurement.

(4) Inventory

Inventory, net of allowance for obsolescence of $273,000 at December 31, 2007 and $333,000 at June 30, 2008 consisted of the following amounts:

	December 31,		June 30,
	2007		2008

Raw materials	$	17,492	$	25,008
Work in process		3,277		5,093
	$	20,769	$	30,101

-7-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(5) Long term debt

On May 16, 2008, we entered into an Eighth Amended and Restated Loan Agreement with Western National Bank, Midland, Texas, effective April 1, 2008. This Loan Agreement (1) decreased the interest rate on existing term loan facilities, and (2) extended and renewed our revolving line of credit facility. Our revolving line of credit and multiple advance term loan facilities are described below.

Revolving Line of Credit Facility. Our revolving line of credit facility allows us to borrow, repay and reborrow funds drawn under this facility. After entering into the Seventh Amended and Restated Loan Agreement, the total amount that we could borrow and have outstanding at any one time is the lesser of $40.0 million or the amount available for advances under a “borrowing base” calculation established by the bank. As of June 30, 2008, the amount available for revolving line of credit advances under our borrowing base was $40.0 million, and there was no principal amount outstanding under the revolving line of credit at that same date. The amount of the borrowing base is based primarily upon our receivables, equipment and inventory. The borrowing base is redetermined by the bank on a monthly basis. If, as a result of the redetermination of the borrowing base, the aggregate outstanding principal amount of the notes payable to the bank under the Loan Agreement exceeds the borrowing base, we must prepay the principal of the revolving line of credit note in an amount equal to such excess. Interest only on borrowings under our revolving line of credit facility is payable monthly on the first day of each month. All outstanding principal and unpaid interest is due on May 1, 2010. As of April 1, 2008, our interest rate on the revolving line of credit is equal to prime rate minus one quarter of one percent (.25%) but never lower than four percent (4%) nor higher than eight and three quarter percent (8.75%). No amounts were outstanding as of June 30, 2008 on this revolving line of credit facility..

$16.9 Million Multiple Advance Term Loan Facility. This multiple advance term loan facility represents the consolidation of our previously existing advancing line of credit and term loan facilities. Reborrowings are not permitted under this facility. Principal under this credit facility is due and payable in 59 monthly installments of $282,000 each, which commenced November 1, 2006 and continuing through September 1, 2011. As of April 1, 2008, our interest rate on the revolving line of credit is equal to prime rate minus one half of one percent (.50%) but never lower than four percent (4%) nor higher than eight and three quarter percent (8.75%). Interest on the unpaid principal balance is due and payable on the same dates as principal payments. All outstanding principal and unpaid interest is due on October 1, 2011. As of June 30, 2008 this term loan facility had a principal balance of $11.3 million.

Our obligations under the Loan Agreement are secured by substantially all of our properties and assets, including our equipment, trade accounts receivable and other personal property and by the real estate and related plant facilities.

The maturity dates of the loan facilities may be accelerated by the bank upon the occurrence of an event of default under the Loan Agreement.

The Loan Agreement contains various restrictive covenants and compliance requirements. These requirements provide that we must have:

·	At the end of each month, a consolidated current ratio (as defined in the Loan Agreement) of at least 1.6 to 1.0;

·	At the end of each month, a consolidated tangible net worth (as defined in the Loan Agreement) of at least $85 million;

·	At the end of each fiscal quarter, a debt service coverage ratio (as defined in the Loan Agreement) of at least 1.50 to 1.00; and

·	At the end of each month, a ratio of consolidated debt to consolidated tangible net worth (as such terms are defined in the Loan Agreement) of less than 2.0 to 1.0.

The Loan Agreement also contains restrictions on incurring additional debt and paying dividends.

As of June 30, 2008, we were in compliance with all material covenants in our Loan Agreement. A default under our bank

credit facility could trigger the acceleration of our bank debt so that it is immediately due and payable. Such default would have a material adverse effect on our liquidity, financial position and operations.

-8-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(6) Earnings per Share

The following table reconciles the numerators and denominators of the basic and diluted earnings per share computation.

	Three months Ended June 30,		Six months Ended June 30,
	2007	2008	2007	2008
Numerator:
Net income	$2,646	$3,333	$5,327	$6,850
Denominator for basic net income per common share:
Weighted average common shares outstanding	12,063	12,088	12,065	12,087

Denominator for diluted net income per share:
Weighted average common shares outstanding	12,063	12,088	12,065	12,087
Dilutive effect of stock options and warrants	28	64	22	63
Diluted weighted average shares	12,091	12,152	12,087	12,150

Earnings per common share:
Basic	$0.22	$0.28	$0.44	$0.57
Diluted	$0.22	$0.27	$0.44	$0.56

(7) Segment Information

SFAS No. 131, Disclosures About Segments of an Enterprise and Related Information, establishes standards for public companies relating to the reporting of financial and descriptive information about their operating segments in financial statements. Operating segments are components of an enterprise about which separate financial information is available that is evaluated regularly by chief operating decision makers in the allocation of resources and the assessment of performance.

The Company identifies its segments based upon major revenue sources as follows:

For the three months ended June 30, 2008:
	Sales		Rental		Service & Maintenance		Corporate			Total
Revenue	$	9,159	$	10,095	$	224	$	—		$	19,478
Operating costs and expenses		6,238		4,094		152		3,849			14,333
Other income/(expense)		—		—		—		(52)			(52)
Income before provision for income taxes	$	2,921	$	6,001	$	72	$	(3,901	)	$	5,093
*Segment Assets	$	—	$	—	$	—	$	163,687		$	163,687

For the three months ended June 30, 2007:
	Sales		Rental		Service & Maintenance		Corporate			Total
Revenue	$	10,159	$	7,222	$	243	$	—		$	17,624
Operating costs and expenses		7,292		2,989		137		3,072			13,490
Other income/(expense)		—		—		—		66			66
Income before provision for income taxes	$	2,867	$	4,233	$	106	$	(3,006	)	$	4,200
*Segment Assets	$	—	$	—	$	—	$	142,394		$	142,394

-9-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

For the six months ended June 30, 2008:
	Sales		Rental		Service & Maintenance		Corporate			Total
Revenue	$	18,785	$	19,105	$	521	$	—		$	38,411
Operating costs and expenses		12,631		7,498		360		7,324			27,813
Other income/(expense)		—		—		—		(60	)		(60	)
Income before provision for income taxes	$	6,154	$	11,607	$	161	$	(7,384	)	$	10,538
*Segment Assets	$	—	$	—	$	—	$	163,687		$	163,687

For the six months ended June 30, 2007:
	Sales		Rental		Service & Maintenance		Corporate			Total
Revenue	$	19,665	$	14,162	$	509	$	—		$	34,336
Operating costs and expenses		13,962		5,724		324		5,989			25,999
Other income/(expense)		—		—		—		118			118
Income before provision for income taxes	$	5,703	$	8,438	$	185	$	(5,871	)	$	8,455
*Segment Assets	$	—	$	—	$	—	$	142,394		$	142,394

* Management does not track assets by segment

-10-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(8) Legal Proceedings

On February 21, 2008, we received notice of a lawsuit filed against us on January 28, 2008 in Montmorency County, Michigan, 26th Circuit Court, Case No. 08-0001901-NZ, styled Dyanna Louise Williams, Plaintiff, v. Natural Gas Services Group, Inc. and Great Lakes Compression Inc., Defendants. In this lawsuit, plaintiff alleges breach of contract, breach of fiduciary duty and negligence. Plaintiff seeks damages in the amount of $100,000 for lost insurance benefits and an unspecified amount of exemplary damages. As the basis for her claims, plaintiff generally alleges that she is the third party beneficiary of a life insurance policy obtained by her deceased ex-husband through Natural Gas Services Group's insurance program, and that as a result of Natural Gas Service Group's negligence and failure to use due care in processing an application for life insurance prior to her ex-husband's death, she was denied $100,000 of life insurance proceeds. Plaintiff now seeks to recover $100,000 from Natural Gas Services Group, plus an unspecified amount of exemplary damages. Due to the early stages of this lawsuit we are unable to accurately predict its outcome but we intend to file an answer denying all of plaintiff's claims and intend to vigorously contest the plaintiff's claims. We have not established a reserve with respect to plaintiff's claims.

From time to time, we are a party to various other legal proceedings in the ordinary course of our business. While management is unable to predict the ultimate outcome of these actions, it believes that any ultimate liability arising from these actions will not have a material adverse effect on our consolidated financial position, results of operations or cash flow. Except as discussed herein, we are not currently a party to any other legal proceedings and we are not aware of any other threatened litigation.

**********************

-11-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The discussion and analysis of our financial condition and results of operations are based on, and should be read in conjunction with, our condensed consolidated financial statements and the related notes included elsewhere in this report and in our December 31, 2007 Form 10-K Report filed with the SEC. All dollar amounts reported in tables are in thousands of dollars unless otherwise noted.

Overview

We fabricate, manufacture, rent and sell natural gas compressors and related equipment. Our primary focus is on the rental of natural gas compressors. Our rental contracts generally provide for initial terms of six to 24 months. After the initial term of our rental contracts, most of our customers have continued to rent our compressors on a month-to-month basis. Rental amounts are paid monthly in advance and include maintenance of the rented compressors. As of June 30, 2008, we had 1,388 natural gas compressors totaling 168,355 horsepower rented to 108 customers, compared to 1,058 natural gas compressors totaling 123,276 horsepower rented to 96 customers at June 30, 2007.

We also fabricate natural gas compressors for sale to our customers, designing compressors to meet unique specifications dictated by well pressures, production characteristics and particular applications for which compression is sought. Fabrication of compressors involves the purchase by us of engines, compressors, coolers and other components, and then assembling these components on skids for delivery to customer locations. The major components of our compressors are acquired through periodic purchase orders placed with third-party suppliers on an “as needed” basis, which presently requires a three to four month lead time with delivery dates scheduled to coincide with our estimated production schedules. Although we do not have formal continuing supply contracts with any major supplier, we believe we have adequate alternative sources available. In the past, we have not experienced any sudden and dramatic increases in the prices of the major components for our compressors. However, the occurrence of such an event could have a material adverse effect on the results of our operations and financial condition, particularly if we were unable to increase our rental rates and sales prices proportionate to any such component price increases.

We also manufacture a proprietary line of compressor frames, cylinders and parts, known as our CiP (Cylinder-in-Plane) product line. We use finished CiP component products in the fabrication of compressor units for sale or rental by us or sell the finished component products to other compressor fabricators. We also design, fabricate, sell, install and service flare stacks and related ignition and control devices for onshore and offshore incineration of gas compounds such as hydrogen sulfide, carbon dioxide, natural gas and liquefied petroleum gases. To provide customer support for our compressor and flare sales businesses, we stock varying levels of replacement parts at our Midland, Texas facility, Tulsa, Oklahoma facility and at field service locations. We also provide an exchange and rebuild program for screw compressors and maintain an inventory of new and used compressors to facilitate this business.

We provide service and maintenance to our customers under written maintenance contracts or on an as required basis in the absence of a service contract. As of June 30, 2008, we had written maintenance agreements with customers relating to 46 compressors. Maintenance agreements typically have terms of nine months to one year and require payment of a monthly fee.

The oil and gas equipment rental and services industry is cyclical in nature. The most critical factor in assessing the outlook for the industry is the worldwide supply and demand for natural gas and the corresponding changes in commodity prices. As demand and prices increase, oil and gas producers increase their capital expenditures for drilling, development and production activities. Generally, the increased capital expenditures ultimately result in greater revenues and profits for services and equipment companies.

In general, we expect our overall business activity and revenues to track the level of activity in the natural gas industry, with changes in domestic natural gas production and consumption levels and prices more significantly affecting our business than changes in crude oil and condensate production and consumption levels and prices. We also believe that demand for compression services and products is driven by declining reservoir pressure in maturing natural gas producing fields and, more recently, by increased focus by producers on non-conventional natural gas production, such as coalbed methane, gas shales and tight gas, which typically requires more compression than production from conventional natural gas reservoirs.

Demand for our products and service was strong throughout 2007 and the first half of 2008. We believe demand will remain strong throughout 2008 due to high oil and natural gas prices and increased demand for natural gas. Because of these market fundamentals for natural gas, we believe the long-term trend of activity in our markets is favorable. However, these factors could be more than offset by other developments affecting the worldwide supply and demand for natural gas.

-12-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

For fiscal year 2008, our forecasted capital expenditures are approximately $40 - $45 million, primarily for additions to our compressor rental fleet. We believe that the proceeds from our public offering of common stock in March 2006, together with funds available to us under our bank credit facility and cash flows from operations will be sufficient to satisfy our capital and liquidity requirements through 2008. We may require additional capital to fund any unanticipated expenditures, including any acquisitions of other businesses. Additional capital may not be available to us when we need it or on acceptable terms.

Results of Operations

Three months ended June 30, 2007, compared to the three months ended June 30, 2008.

The table below shows our revenues and percentage of total revenues of each of our segments for the three months ended June 30, 2007 and June 30, 2008.

	Revenue
	Three months Ended June 30,
	2007				2008
Sales	$	10,159	58	%	$	9,159	47	%
Rental		7,222	41	%		10,095	52	%
Service and Maintenance		243	1	%		224	1	%
Total	$	17,624			$	19,478

Total revenue increased from $17.6 million to $19.5 million, or 10.5%, for the three months ended June 30, 2008, compared to the same period ended June 30, 2007. This was mainly the result of increased rental revenue. Sales revenue decreased 9.8%, rental revenue increased 39.8%, and service and maintenance revenue decreased 7.8%.

Sales revenue decreased from $10.2 million to $9.2 million, or 9.8%, for the three months ended June 30, 2008, compared to the same period ended June 30, 2007. This decrease is mainly the result of shifting the production of a few sold units to producing compressor units for the rental fleet. Sales from outside sources included: (1) compressor unit sales, (2) flare sales, (3) parts sales, (4) compressor rebuilds and (5) rental unit sales.

Rental revenue increased from $7.2 million to $10.1 million, or 39.8%, for the three months ended June 30, 2008, compared to the same period ended June 30, 2007. This increase was the result of additional units added to our rental fleet and rented to third parties. The company ended the period with 1,546 compressor packages in its rental fleet, up from 1,208 units at June 30, 2007. The rental fleet had a utilization of 89.8% as of June 30, 2008 compared to 87.6% utilization as of June 30, 2007.

Service and maintenance revenue decreased from $243,000 to $224,000, or 7.8%, for the three months ended June 30, 2008, compared to the same period ended June 30, 2007.

The overall operating margin percentage increased to 26.4% for the three months ended June 30, 2008, from 23.5% for the same period ended June 30, 2007. This is mainly the result of increased margins on our rental fleet activity and the increased margin for gas compressor sales activity. The overall margin is also affected by the product mix between rental and sales, and since our rental margin is higher and rentals increased during the period, the overall margin moved higher. Because of the larger margins that we obtain from rentals it is generally our focus is to increase our rentals business.

Selling, general, and administrative expense increased from $1.3 million to $1.5 million or 17.7% for the three months ended June 30, 2008, as compared to the same period ended June 30, 2007. This increase is mainly due to an increase in sales commissions on rental equipment, added sales staff and increases in officers’ salaries.

Depreciation and amortization expense increased from $1.8 million, to $2.4 million or 30.6% for the three months ended June 30, 2008, compared to the same period ended June 30, 2007. This increase was the result of 338 new gas compressor rental units being added to the rental fleet from June 30, 2007 to June 30, 2008, thus increasing the depreciable base.

Other income net of other expense decreased $223,000 for the three months ended June 30, 2008, compared to the same period ended June 30, 2007. This decrease is mainly the result of decreased balances in our short-term investments.

-13-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

Interest expense decreased 35.2% for the three months ended June 30, 2008, compared to the same period ended June 30, 2007, mainly due to decreased principal balances owed under our bank loan facility.

Provision for income tax increased from $1.6 million to $1.8 million, or 13.3%, and is the result of the increase in taxable income.

Six months ended June 30, 2007, compared to the six months ended June 30, 2008.

The table below shows our revenues and percentage of total revenues of each of our segments for the six months ended June 30, 2007 and June 30, 2008.

	Revenue
	Six months Ended June 30,
	2007				2008
Sales	$	19,665	57	%	$	18,785	49	%
Rental		14,162	41	%		19,105	50	%
Service and Maintenance		509	2	%		521	1	%
Total	$	34,336			$	38,411

Total revenue increased from $34.3 million to $38.4 million, or 11.9%, for the six months ended June 30, 2008, compared to the same period ended June 30, 2007. This was mainly the result of increased rental revenue. Sales revenue decreased 4.5%, rental revenue increased 34.9%, and service and maintenance revenue increased 2.4%.

Sales revenue decreased from $19.7 million to $18.8 million, or 4.5%, for the six months ended June 30, 2008, compared to the same period ended June 30, 2007. This decrease is mainly the result of shifting the production of a few sold units to producing compressor units for rental fleet. Sales from outside sources included: (1) compressor unit sales, (2) flare sales, (3) parts sales, (4) compressor rebuilds and (5) rental unit sales.

Rental revenue increased from $14.2 million to $19.1 million, or 34.9%, for the six months ended June 30, 2008, compared to the same period ended June 30, 2007. This increase was the result of additional units added to our rental fleet and rented to customers. The company ended the period with 1,546 compressor packages in its rental fleet, up from 1,208 units at June 30, 2007. The rental fleet has a utilization of 89.8% as of June 30, 2008.

Service and maintenance revenue increased from $509,000 to $521,000, or 2.4%, for the six months ended June 30, 2008, compared to the same period ended June 30, 2007. This increase is due to increased service in New Mexico and Michigan.

The overall operating margin percentage increased to 27.6% for the six months ended June 30, 2008, from 24.3% for the same period ended June 30, 2007. This is mainly the result of increased margins of our rental fleet activity. The overall margin is also affected by the product mix between rental and sales, since our rental margin is higher and rentals increased during the period the overall margin moved higher. Because of the larger margins that we obtain from rentals it is generally our focus to increase our rentals business.

Selling, general, and administrative expense increased from $2.5 million, to $2.8 million or 15.2% for the six months ended June 30, 2008, as compared to the same period ended June 30, 2007. This increase is mainly due to the increase in commissions on rental equipment additional sales personnel and an increase in officers’ salaries.

Depreciation and amortization expense increased from $3.5 million, to $4.5 million or 27.3% for the six months ended June 30, 2008, compared to the same period ended June 30, 2007. This increase was the result of 338 new gas compressor rental units being added to the rental fleet from June 30, 2007 to June 30, 2008, thus increasing the depreciable base.

Other income net of other expense decreased $342,000 for the six months ended June 30, 2008, compared to the same period ended June 30, 2007. This decrease is mainly the result of decreased balances in our short-term investments.

-14-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

Interest expense decreased 27.4% for the six months ended June 30, 2008, compared to the same period ended June 30, 2007, mainly due to decreased principal balances owed under our bank loan facility.

Provision for income tax increased from $3.1 million to $3.7 million, or 17.9%, and is the result of the increase in taxable income.

Critical Accounting Policies and Practices

A discussion of our critical accounting policies is included in the Company's Form 10-K for the year ended December 31, 2007.

Recently Issued Accounting Pronouncements

-15-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

Liquidity and Capital Resources

The following represents the Company’s working capital position as of December 31, 2007 and June 30, 2008.

	December 31,		June 30,
	2007			2008

Current Assets:
Cash and cash equivalents	$	245		$	890
Short-term investments		18,661			6,427
Trade accounts receivable, net		11,322			10,524
Inventory, net		20,769			30,101
Prepaid income taxes		3,584			282
Prepaid expenses and other		641			83
Total current assets		55,222			48,307

Current Liabilities:
Current portion of long-term debt and subordinated notes		4,378			3,378
Line of credit		600			—
Accounts payable		4,072			6,856
Accrued liabilities		3,990			5,888
Current portion of tax liability		3,525			97
Deferred income		81			1,751
Total current liabilities		16,646			17,970

Total working capital	$	38,576		$	30,337

Historically, we have funded our operations through public and private offerings of our equity securities, subordinated debt, bank borrowings and cash flow from operations. Proceeds from financing were primarily used to pay debt and to fund the manufacture and fabrication of additional units for our rental fleet of natural gas compressors.

For the six months ended June 30, 2008, we invested $22.0 million in equipment for our rental fleet and service vehicles. We financed this activity with cash flow from operations and cash on hand. In addition, we have repaid $3.8 million of our existing debt.

-16-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

Cash flows

At June 30, 2008, we had cash, cash equivalents and short-term investments of $7.3 million compared to $18.9 million at December 31 2007. We had working capital of $30.3 million at June 30, 2008 compared to $38.6 million at December 31, 2007. At June 30, 2008, our total debt was $11.4 million of which $3.4 million was classified as current compared to $14.6 million and $4.4 million, respectively at December 31, 2007. We had positive net cash flow from operating activities of $13.4 million during the first six months of 2008 compared to $8.8 million for the first six months of 2007. This was primarily from net income of $6.9 million, a decrease in accounts receivable of $798,000 and an increase in accounts payable and accrued liabilities of $4.7 million, offset by an increase in inventory of $9.3 million during the six months ended June 30, 2008.

Accounts receivable decreased $798,000 to $10.5 million at June 30, 2008 as compared to $11.3 million at December 31, 2007, this decrease largely reflects collections during the first half of 2008.

Inventory increased $9.3 million to $30.1 million as of June 30, 2008, as compared to $20.8 million as of the year ended December 31, 2007. This increase is mainly the result of additional inventory to stock the service branches and an increase in raw materials to meet increased production scheduled.

Long-term debt decreased $2.7 million to $11.3 million at June 30, 2008, compared to $14.0 million at December 31, 2007. This decrease is the result of the normal debt amortization. The current portion of long-term debt decreased to $3.4 million at June 30, 2008, compared to $4.4 million at December 31, 2007 due to the final payment of $1.0 million of our subordinated debt on January 3, 2008.

Senior Bank Borrowings

On May 16, 2008, we entered into an Eighth Amended and Restated Loan Agreement with Western National Bank, Midland, Texas effective April 1, 2008. This Loan Agreement (1) decreased the interest rate on existing term loan facilities, and (2) extended and renewed our revolving line of credit facility. Our revolving line of credit and multiple advance term loan facilities are described below.

$16.9 Million Multiple Advance Term Loan Facility. This multiple advance term loan facility represents the consolidation of our previously existing advancing line of credit and term loan facilities. Reborrowings are not permitted under this facility. Principal under this credit facility is due and payable in 59 monthly installments of $282 thousand each, which commenced November 1, 2006 and continuing through September 1, 2011. As of April 1, 2008, our interest rate on the revolving line of credit is equal to prime rate minus one half of one percent (.50%) but never lower than four percent (4%) nor higher than eight and three quarter percent (8.75%). Interest on the unpaid principal balance is due and payable on the same dates as principal payments. All outstanding principal and unpaid interest is due on October 1, 2011. As of June 30, 2008 this term loan facility had a principal balance of $11.3 million.

The maturity dates of the loan facilities may be accelerated by the bank upon the occurrence of an event of default under the Loan Agreement.

The Loan Agreement contains various restrictive covenants and compliance requirements. These requirements provide that we must have:

-17-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

·	At the end of each month, a consolidated current ratio (as defined in the Loan Agreement) of at least 1.6 to 1.0;

·	At the end of each month, a consolidated tangible net worth (as defined in the Loan Agreement) of at least $85 million;

·	At the end of each fiscal quarter, a debt service coverage ratio (as defined in the Loan Agreement) of at least 1.50 to 1.00; and

·	At the end of each month, a ratio of consolidated debt to consolidated tangible net worth (as such terms are defined in the Loan Agreement) of less than 2.0 to 1.0.

The Loan Agreement also contains restrictions on incurring additional debt and paying dividends.

As of June 30, 2008, we were in compliance with all material covenants in our Loan Agreement. A default under our bank credit facility could trigger the acceleration of our bank debt so that it is immediately due and payable. Such default would have a material adverse effect on our liquidity, financial position and operations.

Subordinated Debt-Related Parties

We had subordinated debt which was included in the current portion of long-term debt for the year ended December 31, 2007. The $3.0 million principal amount of this debt was in the form of promissory notes issued to the three stockholders of Screw Compression Systems who are currently employees of the Company, as part of the consideration for the acquisition of SCS we completed on January 3, 2005. The principal of each note was payable in three equal annual installments which commenced on January 3, 2006. Accrued and unpaid interest on the unpaid principal balance of each note was payable on the same dates as, and in addition to, the installments of principal. On January 3, 2008, we paid the third and last installment of the annual payments.

Contractual Obligations and Commitments

We have contractual obligations and commitments that affect our consolidated results of operations, financial condition and liquidity. The following table is a summary of our significant cash contractual obligations:

	Obligation Due in Period (in thousands of dollars)
	2008(1)		2009		2010		2011		2012		Thereafter		Total
Credit facility (secured)	$	1,689	$	3,378	$	3,378	$	2,816	$	—		—	$	11,261
Interest on credit facility(2)		234		355		203		63		—		—		855
Other long term debt		—		—		—		—		—		150		150
Facilities and office leases		155		288		211		160		168		114		1,096
Total	$	2,078	$	4,021	$	3,792	$	3,039	$	168	$	264	$	13,362

(1)		For the six months remaining in 2008.
(2)		Assumes an interest rate of 4.5%.

Off-Balance Sheet Arrangements

From time-to-time, we enter into off-balance sheet arrangements and transactions that can give rise to off-balance sheet obligations. As of June 30, 2008, the off-balance sheet arrangements and transactions that we have entered into include operating lease agreements. We do not believe that these arrangements are reasonably likely to materially affect our liquidity, availability of, or requirements for, capital resources.

Special Note Regarding Forward-Looking Statements

Please refer to and read “Special Note Regarding Forward-Looking Statements” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2007.

-18-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

Commodity Risk

Our commodity risk exposure is the pricing applicable to oil and natural gas production. Realized commodity prices received for such production are primarily driven by the prevailing worldwide price for crude oil and spot prices applicable to natural gas. Depending on the market prices of oil and natural gas, companies exploring for oil and natural gas may cancel or curtail their drilling programs, thereby reducing demand for our equipment and services.

Financial Instruments and Debt Maturities

Our financial instruments consist of cash and cash equivalents, short-term investments, accounts receivable, accounts payable, bank borrowings, and notes. The carrying amounts of cash and cash equivalents, accounts receivable and accounts payable approximate fair value due to the highly liquid nature of these short-term instruments. The fair value of the bank borrowings approximate the carrying amounts as of June 30, 2008, and were determined based upon interest rates currently available to us for borrowings with similar terms.

Customer Credit Risk

We are exposed to the risk of financial non-performance by customers. Our ability to collect on sales to our customers is dependent on the liquidity of our customer base. To manage customer credit risk, we monitor credit ratings of customers and seek to minimize exposure to any one customer where other customers are readily available. Unless we are able to retain our existing customers, or secure new customers if we lose one or more of our significant customers, our revenue and results of operations would be adversely affected.

Interest Rate Risk

Our Loan Agreement provides for Prime Rate less 1/2 % for our term loan facility and Prime Rate less 1/4 % for our revolving line of credit facility. Consequently, our exposure to interest rates relate primarily to interest earned on short-term investments and paying above market rates, if such rates are below the fixed rate, on our bank borrowings. As of June 30, 2008, we were not using any derivatives to manage interest rate risk.

Item 4. Controls and Procedures

(a) Evaluation of Disclosure Controls and Procedures.

Under the supervision and with the participation of certain members of Natural Gas Services Group, Inc’s management, the chief executive officer and the vice-president of accounting evaluated the effectiveness of the design and operation of the disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) of Natural Gas Services Group, Inc. as of the end of the period covered by this report. Based on this evaluation, the chief executive officer and vice-president of accounting concluded that, as of the end of the period covered by this report, Natural Gas Services Group, Inc’s disclosure controls and procedures were effective to ensure that information required to be disclosed by Natural Gas Services Group, Inc. in the reports that it files under the Exchange Act is collected, processed and disclosed within the time periods specified in the SEC’s rules and forms.

(b) Changes in Internal Controls.

There were no changes in Natural Gas Services Group, Inc’s internal controls during the period covered by this report that have materially affected or are reasonably likely to materially affect Natural Gas Services Group, Inc’s internal controls over financial reporting. In addition, to the knowledge of the chief executive officer and vice-president of accounting there were no changes in other factors that could significantly affect these controls subsequent to the date of the most recent evaluation made by the chief executive officer and the vice-president of accounting.

-19-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

PART II – OTHER INFORMATION

Item 1. Legal Proceedings

Item 1A. Risk Factors

Please refer to and read “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2007 for a discussion of the risk associated with our company and industry.

-20-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

Item 6. Exhibits

The following exhibits are filed herewith or incorporated herein by reference, as indicated:

Description

Exhibit No.

3.1	Articles of Incorporation, as amended (Incorporated by reference to Exhibit 3.1 of the 10QSB filed and dated November 10, 2004)

3.2	Bylaws (Incorporated by reference to Exhibit 3.4 of the Registrant's Registration Statement on Form SB-2, No. 333-88314)

Executive Compensation Plans and Arrangements (Exhibits 10.1, 10.4, 10.5, 10.8, 10.9, 10.10 and 10.11).

10.1	1998 Stock Option Plan, as amended (Incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K Report dated June 20, 2006 on file with the SEC June 26, 2006)

10.2	Lease Agreement, dated March 1, 2004, between the Registrant and the City of Midland, Texas (Incorporated by reference to Exhibit 10.19 of the Registrant's Form 10-QSB for the fiscal quarter ended June 30, 2004)

10.3	Securities Purchase Agreement, dated July 20, 2004, between the Registrant and CBarney Investments, Ltd. (Incorporated by reference to Exhibit 4.1 of the Registrant's Current Report on Form 8-K dated July 20, 2004 and filed with the Securities and Exchange Commission on July 27, 2004)

10.4	Employment Agreement between Paul D. Hensley and Natural Gas Services Group, Inc. (Incorporated by reference to Exhibit 10.1 of the Registrants Form 8-K Report, dated January 3, 2005, as filed with the Securities and Exchange Commission on January 7, 2005)

10.5

Promissory Note, dated January 3, 2005, in the original principal amount of $2.1 million made by Natural Gas Services Group, Inc. payable to Paul D. Hensley (Incorporated by reference to Exhibit 10.26 of the Registrant's Form 10-KSB for the fiscal year ended December 31, 2004, and filed with the Securities and Exchange Commission on March 30, 2005)

10.6

Guaranty Agreement, dated as of January 3, 2005, made by Natural Gas Service Group, Inc., for the benefit of Western National Bank (Incorporated by reference to Exhibit 10.3 of the Registrant’s Current Report on Form 8-K, dated January 3, 2005, and filed with the Securities and Exchange Commission on January 7, 2005)

10.7

Guaranty Agreement, dated as of January 3, 2005, made by Screw Compression Systems, Inc., for the benefit of Western National Bank (Incorporated by reference to Exhibit 10.4 of the Registrant’s Current Report on Form 8-K, dated January 3, 2005, and filed with the Securities and Exchange Commission on January 7, 2005)

10.8	Employment Agreement between Stephen C. Taylor and Natural Gas Services Group, Inc. (Incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K Report, dated August 24, 2005, and filed with the Securities and Exchange Commission on August 30, 2005)

10.9	Employment Agreement between James R. Hazlett and Natural Gas Services Group, Inc. (Incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K Report, dated June 14, 2005, and filed with the Securities and Exchange Commission on November 14, 2005)

10.10

Promissory Note, dated January 3, 2005, in the original principal amount of $300 thousand made by Natural Gas Services Group, Inc. payable to Jim Hazlett (Incorporated by reference to Exhibit 10.3 of the Registrant’s Form 8-K Report, dated June 14, 2005, and filed with the Securities and Exchange Commission on November 14, 2005)

-21-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

10.11

Retirement Agreement, dated December 14, 2005, between Wallace C. Sparkman and Natural Gas Services Group, Inc. (Incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K Report, dated December 14, 2005, and filed with the Securities and Exchange Commission on December 15, 2005)

10.12

Guaranty Agreement, dated as of January 3, 2006, and made by Screw Compression Systems, Inc. for the benefit of Western National Bank (Incorporated by reference to Exhibit 10.4 of the Registrant’s Current Report on Form 8-K, dated January 3, 2006, and filed with the Securities and Exchange Commission on January 6, 2006)

10.13

Seventh Amended and Restated Loan Agreement (Incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K dated October 26, 2006 and filed with the Securities and Exchange Commission on November 1, 2006

*10.14

Eighth Amended and Restated Loan Agreement between Natural Gas Services Group, Inc. and Western National Bank.

*10.15

Revolving Line of Credit Promissory Note issued to Western National Bank.

14.0	Code of Ethics (Incorporated by reference to Exhibit 14.0 of the Registrant's Form 10-KSB for the fiscal year ended December 31, 2004, and filed with the Securities and Exchange Commission on March 30, 2005)

21.0	Subsidiaries (Incorporated by reference to Exhibit 21.0 of the Registrant's Form 10-KSB for the fiscal year ended December 31, 2004, and filed with the Securities and Exchange Commission on March 30, 2005)

*31.1

Certifications

*31.2

Certifications

*32.1

Certification required by Section 906 of the Sarbanes-Oxley Act of 2002

*32.2

Certification required by Section 906 of the Sarbanes-Oxley Act of 2002

* Filed herewith.

-22-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

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.

NATURAL GAS SERVICES GROUP, INC.


/s/Stephen C. Taylor			/s/ Earl R. Wait
Stephen C. Taylor			Earl R. Wait
President and Chief Executive Officer			Principal Accounting Officer and Treasurer

August 7, 2008

-23-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

INDEX TO EXHIBITS

Description

Exhibit No.

3.1	Articles of Incorporation, as amended (Incorporated by reference to Exhibit 3.1 of the 10QSB filed and dated November 10, 2004)

3.2	Bylaws (Incorporated by reference to Exhibit 3.4 of the Registrant's Registration Statement on Form SB-2, No. 333-88314)

Executive Compensation Plans and Arrangements (Exhibits 10.1, 10.4, 10.5, 10.8, 10.9, 10.10 and 10.11).

10.1	1998 Stock Option Plan, as amended (Incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K Report dated June 20, 2006 on file with the SEC June 26, 2006)

10.2	Lease Agreement, dated March 1, 2004, between the Registrant and the City of Midland, Texas (Incorporated by reference to Exhibit 10.19 of the Registrant's Form 10-QSB for the fiscal quarter ended June 30, 2004)

10.3	Securities Purchase Agreement, dated July 20, 2004, between the Registrant and CBarney Investments, Ltd. (Incorporated by reference to Exhibit 4.1 of the Registrant's Current Report on Form 8-K dated July 20, 2004 and filed with the Securities and Exchange Commission on July 27, 2004)

10.4	Employment Agreement between Paul D. Hensley and Natural Gas Services Group, Inc. (Incorporated by reference to Exhibit 10.1 of the Registrants Form 8-K Report, dated January 3, 2005, as filed with the Securities and Exchange Commission on January 7, 2005)

10.5

10.6

10.7

10.8	Employment Agreement between Stephen C. Taylor and Natural Gas Services Group, Inc. (Incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K Report, dated August 24, 2005, and filed with the Securities and Exchange Commission on August 30, 2005)

10.9	Employment Agreement between James R. Hazlett and Natural Gas Services Group, Inc. (Incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K Report, dated June 14, 2005, and filed with the Securities and Exchange Commission on November 14, 2005)

10.10

10.11

-24-

Table of Contents

NATURAL GAS SERVICES GROUP, INC.

10.12

10.13

*10.14

Eighth Amended and Restated Loan Agreement between Natural Gas Services Group, Inc. and Western National Bank.

*10.15

Revolving Line of Credit Promissory Note issued to Western National Bank.

14.0	Code of Ethics (Incorporated by reference to Exhibit 14.0 of the Registrant's Form 10-KSB for the fiscal year ended December 31, 2004, and filed with the Securities and Exchange Commission on March 30, 2005)

21.0	Subsidiaries (Incorporated by reference to Exhibit 21.0 of the Registrant's Form 10-KSB for the fiscal year ended December 31, 2004, and filed with the Securities and Exchange Commission on March 30, 2005)

*31.1

Certifications

*31.2

Certifications

*32.1

Certification required by Section 906 of the Sarbanes-Oxley Act of 2002

*32.2

Certification required by Section 906 of the Sarbanes-Oxley Act of 2002

* Filed herewith.

-25-