Builders FirstSource, Inc. - Quarter Report: 2016 March (Form 10-Q)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

For the quarterly period ended March 31, 2016

OR

For the transition period from                 to                

Commission File Number 0-51357

BUILDERS FIRSTSOURCE, INC.

(Exact name of registrant as specified in its charter)

(214) 880-3500

(Registrant’s telephone number, including area code)

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  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (Section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).     Yes  x    No  ¨

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.

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

The number of shares of the issuer’s common stock, par value $0.01, outstanding as of May 3, 2016 was 110,110,756.

BUILDERS FIRSTSOURCE, INC.

Index to Form 10-Q

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PART I  — FINANCIAL INFORMATION

Item 1. Financial Statements (unaudited)

BUILDERS FIRSTSOURCE, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)

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

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BUILDERS FIRSTSOURCE, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

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

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BUILDERS FIRSTSOURCE, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

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

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BUILDERS FIRSTSOURCE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

1.  Basis of Presentation

Builders FirstSource, Inc., a Delaware corporation formed in 1998, is a leading supplier of building materials, manufactured components and construction services to professional contractors, sub-contractors, and consumers.  Following our acquisition of ProBuild Holdings, LLC (“ProBuild”) in July 2015, the company operates locations in 40 states across the United States. In this quarterly report, references to the “Company,” “we,” “our,” “ours” or “us” refer to Builders FirstSource, Inc. and its consolidated subsidiaries (including ProBuild as of July 31, 2015), unless otherwise stated or the context otherwise requires.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all recurring adjustments and normal accruals necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the dates and periods presented. Results for interim periods are not necessarily indicative of the results to be expected during the remainder of the current year or for any future period. All significant intercompany accounts and transactions have been eliminated in consolidation.

The condensed consolidated balance sheet as of December 31, 2015 is derived from the audited consolidated financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America. This condensed consolidated balance sheet as of December 31, 2015 and the unaudited condensed consolidated financial statements included herein should be read in conjunction with the more detailed audited consolidated financial statements for the year ended December 31, 2015 included in our most recent annual report on Form 10-K. Accounting policies used in the preparation of these unaudited condensed consolidated financial statements are consistent with the accounting policies described in the Notes to Consolidated Financial Statements included in our Form 10-K.

Recent Accounting Pronouncements

In March 2016, the Financial Accounting Standards Board (“FASB”) issued an update to the existing guidance under the Compensation-Stock Compensation topic. This update simplifies several aspects of accounting for stock compensation including accounting for income taxes, classification of awards as liabilities or equity, forfeitures and classification on the statement of cash flows. This update is effective for public companies for annual and interim reporting periods beginning after December 15, 2016. Early adoption is permitted with adjustments reflected as of the beginning of the fiscal year of adoption. The various aspects of this guidance require prospective, retrospective, or modified retrospective application. We are currently evaluating the impact of this guidance on our financial statements.

In February 2016, the FASB issued an update to the existing guidance under Leases topic. Under the new guidance, lessees will be required to recognize the following for all leases, with the exception of short-term leases, at the commencement date: (1) a lease liability, which is a lessee‘s obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. This update requires a modified retrospective transition as of the beginning of the earliest comparative period presented in the financial statements. This update is effective for public companies for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. We are currently evaluating the impact of this guidance on our financial statements.

In July 2015 the FASB issued an update to the existing guidance under the Inventory topic of the Codification. This update changes the subsequent measurement of inventory from lower of cost or market to lower of cost and net realizable value. This guidance is effective for interim and annual reporting periods beginning after December 15, 2016. Early adoption of this guidance is permitted as of the beginning of an interim or annual reporting period. This guidance requires prospective application. We do not expect the adoption of this guidance to have an impact on our financial statements.

In August 2014, the FASB issued an update to the existing guidance under the Presentation of Financial Statements topic of the Codification. This update requires management to perform interim and annual assessments on whether there are conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern within one year of the date the financial statements are issued and to provide related disclosures, if required. This new guidance is effective for the annual period ending after December 15, 2016, and for annual and interim periods thereafter. Early adoption is permitted, but not required. We do not expect the adoption of this guidance to have an impact on our financial statements.

In May 2014, the FASB issued an update to the existing guidance under the Revenue Recognition topic of the Codification which is a comprehensive new revenue recognition model requiring a company to recognize revenue to depict the transfer of promised

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goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.  This new guidance was originally effective for annual reporting periods beginning after December 15, 2016. However, in July 2015 the FASB approved an optional one year deferral of the effective date to annual reporting periods beginning after December 15, 2017.  As such, this guidance will be effective for us beginning on January 1, 2018. Early adoption is permitted; however, this guidance cannot be adopted earlier than the original effective date. This guidance allows either full retrospective or modified retrospective methods of adoption. We are currently evaluating the impact of this guidance on our financial statements.

2. Acquisitions

On July 31, 2015, we acquired all of the operating affiliates of ProBuild through the purchase of all issued and outstanding equity interests of ProBuild for $1.63 billion in cash, subject to certain adjustments. The purchase price was funded by the net proceeds received from concurrent financing transactions. Previously headquartered in Denver, Colorado, ProBuild is one of the nation’s largest professional building materials suppliers. As a result of the ProBuild acquisition, the Company has a greater diversification of products and services and a significantly improved geographic footprint.

The ProBuild acquisition was accounted for by the acquisition method, and accordingly the results of operations were included in the Company’s consolidated financial statements from the acquisition date. The purchase price was allocated to the assets acquired based on estimated fair values at the acquisition date, with the excess of purchase price over the estimated fair value of the net assets acquired recorded as goodwill. All final purchase accounting adjustments related to this acquisition, which primarily reflect the final purchase price allocations and other revisions to the methodology and assumptions associated with the intangible asset valuations, have been recorded as of December 31, 2015. The fair value of acquired intangible assets of $184.5 million, primarily related to tradenames, customer relationships and lease contract intangibles, was estimated by applying an income approach. That measure is based on significant Level 3 inputs not observable in the market. Key assumptions developed based on the Company’s historical experience, future projections and comparable market data include future cash flows, long-term growth rates, royalty rates, attrition rates and discount rates.

We incurred $5.3 million in costs related to the acquisition during the three months ended March 31, 2015. These costs include due diligence costs and transaction costs to complete the acquisition, and were recognized in selling, general and administrative expense in the accompanying condensed consolidated statements of operations and comprehensive income (loss) for the three months ended March 31, 2015. We did not incur any acquisition related costs during the three months ended March 31, 2016.

The following table summarizes the aggregate fair values of the assets acquired and liabilities assumed at the acquisition date for ProBuild, net of cash (in thousands):

All of the goodwill and intangible assets recognized from the ProBuild acquisitions are expected to be deductible for tax purposes, with the goodwill recognized from these acquisitions being amortized ratably over a 15 year period. The ProBuild acquisition was treated as an asset purchase for tax purposes.

The operating results of this acquisition have been included in the consolidated statements of operations and comprehensive income (loss) from the acquisition date through March 31, 2016. Net sales and net income attributable to ProBuild were $982.7

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million and $8.1 million, respectively, for the period of January 1, 2016 through March 31, 2016. Net income attributable to ProBuild does not include an allocation of the additional interest expense incurred by the Company as a result of the ProBuild acquisition financing transactions.

The following table reflects the unaudited pro forma operating results for the Company for the three months ended March 31, 2015 which gives effect to the acquisition of ProBuild as if it had occurred on January 1, 2014. The pro forma results are based on assumptions that the Company believes are reasonable under the circumstances. The pro forma results are not necessarily indicative of future results. The pro forma financial information includes the historical results of the Company and ProBuild adjusted for certain items, which are described below, and does not include the effects of any synergies or cost reduction initiatives related to the acquisition of ProBuild.

Pro forma net loss for the three months ended March 31, 2015 reflects adjustments primarily related to depreciation and amortization, the conversion from last-in, first-out to first-in, first out inventory valuation, and interest expense. Pro forma net loss was adjusted to exclude transaction-related expenses of $6.3 million ($5.3 million incurred by the Company and $1.0 million incurred by ProBuild) in the three months ended March 31, 2015, respectively.

3. Net Loss per Common Share

Net loss per common share (“EPS”) is calculated in accordance with the Earnings per Share topic of the FASB Accounting Standards Codification (“Codification”), which requires the presentation of basic and diluted EPS. Basic EPS is computed using the weighted average number of common shares outstanding during the period. Diluted EPS is computed using the weighted average number of common shares outstanding during the period, plus the dilutive effect of potential common shares.

Our restricted stock shares include rights to receive dividends that are not subject to the risk of forfeiture even if the underlying restricted stock shares on which the dividends were paid do not vest. In accordance with the Earnings per Share topic of the Codification, unvested share-based payment awards that contain non-forfeitable rights to dividends are deemed participating securities and should be considered in the calculation of basic EPS. Since the restricted stock shares do not include an obligation to share in losses, they will be included in our basic EPS calculation in periods of net income and excluded from our basic EPS calculation in periods of net loss. Accordingly, there were 13,000 and 27,000 restricted stock shares excluded from our calculation of basic EPS for the three months ended March 31, 2016 and 2015, respectively as we generated a net loss during those periods.

For the purpose of computing diluted EPS, options to purchase 5.0 million shares of common stock and 2.2 million restricted stock units (“RSUs’) were not included in the computations of diluted EPS for the three months ended March 31, 2016 because their effect was anti-dilutive. There were no outstanding warrants as of March 31, 2016 as all of the remaining stock warrants were exercised in the second quarter of 2015.

Weighted average shares outstanding have been adjusted for common shares underlying 0.7 million warrants for the three months ended March 31, 2015. In addition, $0.2 million of income due to fair value adjustments related to the warrants was excluded from our net loss in the computation of diluted EPS for the three months ended March 31, 2015. Options to purchase 6.4 million shares of common stock  and 1.5 million RSUs were not included in the computation of diluted EPS for the three months ended March 31, 2015 because their effect was anti-dilutive.

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The table below presents a reconciliation of weighted average common shares used in the calculation of basic and diluted EPS (in thousands):  

4. Debt

Long-term debt and lease obligations consisted of the following (in thousands):

Note Exchange Transactions

On February 12, 2016, we completed separate privately negotiated note exchange transactions in which $218.6 million in aggregate principal amount of our 10.75% senior unsecured notes due 2023 (“2023 notes”) was exchanged for $207.6 million in aggregate principal amount of our 7.625% senior secured notes due 2021 (“2021 notes”). On February 29, 2016, we completed additional separate privately negotiated note exchange transactions in which $63.8 million in aggregate principal amount of our 2023 notes was exchanged for $60.0 million in aggregate principal amount of our 2021 notes. The 2021 notes were issued under the existing indenture dated as of May 29, 2013. Following these transactions, $617.6 million in aggregate principal amount of our 2021 notes and $417.6 million in aggregate principal amount of our 2023 notes remain outstanding.

The note exchange transactions were considered to be debt extinguishments. As such, we recognized a net gain of $7.8 million which was recorded as an offset to interest expense in the condensed consolidated statements of operations and comprehensive income (loss) in first quarter of 2016. Of this $7.8 million gain, $14.8 million was attributable to the reduction in outstanding principal which was partially offset by the write-off of $7.0 million of unamortized debt issuance costs associated with the 2023 notes which were extinguished in the exchange transactions.

In connection with issuance of the 2021 notes in the exchange transactions, we incurred $4.9 million of various third-party fees and expenses. These costs have been recorded as a reduction to long-term debt and are being amortized over the remaining term of the 2021 notes using the effective interest method.

2015 Facility Borrowings

As of March 31, 2016, we have $59.0 million in borrowings outstanding under our $800.0 million senior secured revolving credit facility (“2015 facility”). During the first quarter of 2016, we borrowed $221.0 million and repaid $222.0 million at a weighted average interest rate of 2.9%.

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Fair Value

The only financial instrument which was measured at fair value on a recurring basis was our warrants. However, in April 2015, the remaining 0.7 million of outstanding, detachable warrants were exercised. The warrants were considered to be derivative financial instruments and were classified as liabilities.

The table below presents the effect of our derivative financial instrument on the condensed consolidated statements of operations and comprehensive income (loss) (in thousands):

We used the income approach to value our warrants by using the Black-Scholes option-pricing model. Using this model, the risk-free interest rate was based on the U.S. Treasury yield curve in effect on the valuation date. The expected life was based on the period of time until the expiration of the warrants. Expected volatility was based on the historical volatility of our common stock over the most recent period equal to the expected life of the warrants. The expected dividend yield was based on our history of not paying regular dividends in the past.

These techniques incorporated Level 1 and Level 2 inputs. Significant inputs to the derivative valuation for the warrants were observable in the active markets and are classified as Level 2 in the hierarchy.

We have elected to report the value of our 2021 notes, 2023 notes, and the $600.0 million term loan credit agreement (“2015 term loan”) at amortized cost. The fair values of the 2021 notes, the 2023 notes and the 2015 term loan at March 31, 2016 were approximately $644.6 million, $422.8 million and $594.3 million, respectively, and were determined using Level 2 inputs based on market prices.

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5. Employee Stock-Based Compensation

Time Based Restricted Stock Unit Grants

In the first quarter of 2016, our board of directors granted 625,000 RSUs to employees and eligible directors under our 2007 and 2014 Incentive Plans for which vesting is based on continuous employment over the requisite service period. 530,000 of the RSUs vest at 33% per year at each anniversary of the grant date over the next three years, 63,000 RSUs vest at 25% per year at each anniversary of the grant date over the next four years and 32,000 RSUs vest 100% at the first anniversary of the grant date. The weighted average grant date fair value for these RSUs was $10.52 per share, which was based on the closing stock price on the grant dates.

Performance and Service Condition Based Restricted Stock Unit Grants

In the first quarter of 2016, our board of directors granted 265,000 RSUs to employees under our 2014 Incentive Plan which vest if the compound annual growth rate of the Company’s total sales in 2018 over 2015 exceeds a composite annual growth rate based on single-family housing starts, multi-family housing starts, and growth in repair and remodeling sales over the same period. Upon continued employment and if the performance vesting condition is achieved, these awards will cliff vest on the third anniversary of the grant date. The weighted average grant date fair value for these RSUs was $10.96 per share, which was based on the closing stock price on the grant dates.

Market and Service Condition Based Restricted Stock Unit Grants

In the first quarter of 2016, our board of directors granted 265,000 RSUs to employees under our 2014 Incentive Plan for which vesting is contingent upon the Company’s total shareholder return exceeding that of the Company’s peer group over a three year measurement period. Upon continued employment and if the market vesting condition is met, these awards will cliff vest on the third anniversary of the grant date. The weighted average grant date fair value for these RSUs was $7.58 per share, which was determined using the Monte Carlo simulation model using the following weighted average assumptions:

The expected volatilities are based on the historical volatilities of our common stock and the common stocks of the constituents of the Company’s peer group over the most recent period equal to the measurement period. The expected dividend yield is based on our history of not paying regular dividends in the past and our current intention to not pay regular dividends in the foreseeable future. The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant and has a term equal to the measurement period.

Stock Option Grant

In the first quarter of 2016, our board of directors granted 63,000 stock options to employees under our 2014 Incentive Plan. All the awards vest at 25% per year at each anniversary of the grant date over four years. The exercise price for the options was $6.59 per share, which was the closing stock price on the grant date. The weighted average grant date fair value of the options was $3.71 and was determined using the Black-Scholes option-pricing model with the following weighted average assumptions:

The expected life represents the period of time the options are expected to be outstanding. We used the simplified method for determining the expected life assumption due to limited historical exercise experience on our stock options. The expected volatility is based on the historical volatility of our common stock over the most recent period equal to the expected life of the option. The expected dividend yield is based on our history of not paying regular dividends in the past and our current intention to not pay regular dividends in the foreseeable future. The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant and has a term equal to the expected life of the options.

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6. Income Taxes

We evaluate our deferred tax assets on a quarterly basis to determine whether a valuation allowance is required. In accordance with the Income Taxes topic of the Codification we assess whether it is more likely than not that some or all of our deferred tax assets will not be realized. Significant judgment is required in estimating valuation allowances for deferred tax assets. The realization of a deferred tax asset ultimately depends on the existence of sufficient taxable income in the applicable carryback or carryforward periods. We consider nature, frequency, and severity of current and cumulative losses, among other matters, the reversal of existing deferred tax liabilities, historical and forecasted taxable income, and tax planning strategies in our assessment. Changes in our estimates of future taxable income and tax planning strategies will affect our estimate of the realization of the tax benefits of these tax carryforwards.  To the extent we generate sufficient taxable income in the future to fully utilize the tax benefits of the net tax deferred assets on which a valuation allowance was recorded, our effective tax rate may decrease as the valuation allowance is reversed.

Historically weak housing market conditions have contributed to our cumulative loss position for the past several years. We have a cumulative unadjusted loss for the three year period ending March 31, 2016. Further, taking into consideration the historical ProBuild results on a proforma basis, including debt, also results in a cumulative loss for the three year period ending March 31, 2016. We believe the cumulative loss position, as well as uncertainty around the extent and timing of the continued housing market recovery, represents significant negative evidence in considering whether our deferred tax assets are realizable. Further, we do not believe that relying solely on projections of future taxable income to support the recovery of deferred tax assets is sufficient.  Based on an evaluation of positive and negative evidence, we concluded that the negative evidence regarding our ability to realize our deferred tax assets outweighed the positive evidence as of March 31, 2016.

The amount of the deferred tax asset considered realizable, however, could be adjusted if estimates of future taxable income during the carryforward period are reduced or increased, or if objective negative evidence in the form of cumulative losses is no longer present and additional weight may be given to subjective evidence such as our projections for growth.  We currently estimate that we will likely transition into a three year cumulative income position, including an evaluation of ProBuild’s historical results, on a rolling three year period at some time during the year ending December 31, 2016. However, there continues to be uncertainty around housing market projections and without continued improvement in housing activity, we may not reverse our cumulative loss position.  Simply coming out of a cumulative loss position is not necessarily considered sufficient positive evidence to reverse some or all of the valuation allowance if there is other negative evidence. In upcoming quarters, we will closely monitor the positive and negative evidence surrounding our ability to realize our deferred tax assets.

As of December 31, 2015 we had $414.6 million of state operating loss carry-forwards, which included $2.6 million of state tax credit carry-forwards expiring at various dates through 2035. In addition, at December 31, 2015 we also had $281.2 million of federal net operating loss carry-forwards that will expire at various dates through 2035.

We recorded increases to the valuation allowance of $5.1 million and $3.1 million for the three months ended March 31, 2016 and 2015, respectively against our net deferred tax assets as we generated net operating losses during those periods. Our effective tax rate was (36.4%) and (2.9%) for the three months ended March 31, 2016 and 2015, respectively. We have historically calculated the provision for income taxes during interim reporting periods by applying an estimate of the annual effective tax rate for the full fiscal year to “ordinary” income or loss (pretax income or loss excluding unusual or infrequently occurring discrete items) for the reporting period. We have used a discrete effective tax rate method to calculate income tax expense for the three months ended March 31, 2016 as we determined that due to higher tax expense in 2016, primarily relating to deferred tax expense arising from amortization of goodwill, that even a small level of volatility in projections would result in significant fluctuations in the estimated annualized effective tax rate.

Section 382 of the Internal Revenue Code imposes annual limitations on the utilization of net operating loss (“NOL”) carryforwards, other tax carryforwards, and certain built-in losses upon an ownership change as defined under that section. In general terms, an ownership change may result from transactions that increase the aggregate ownership of certain stockholders in the Company’s stock by more than 50 percentage points over a three year testing period (“Section 382 Ownership Change”). If the Company were to experience a Section 382 Ownership Change, an annual limitation would be imposed on certain of the Company’s tax attributes, including NOL and capital loss carryforwards, and certain other losses, credits, deductions or tax basis.

We base our estimate of deferred tax assets and liabilities on current tax laws and rates. In certain cases, we also base our estimate on business plan forecasts and other expectations about future outcomes. Changes in existing tax laws or rates could affect our actual tax results, and future business results may affect the amount of our deferred tax liabilities or the valuation of our deferred tax assets over time. Due to uncertainties in the estimation process, particularly with respect to changes in facts and circumstances in future reporting periods, as well as the residential homebuilding industry’s cyclicality and sensitivity to changes in economic conditions, it is possible that actual results could differ from the estimates used in previous analyses.  

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Accounting for deferred taxes is based upon estimates of future results. Differences between the anticipated and actual outcomes of these future results could have a material impact on our consolidated results of operations or financial position.

7. Commitments and Contingencies

We are a party to various legal proceedings in the ordinary course of business. Although the ultimate disposition of these proceedings cannot be predicted with certainty, management believes the outcome of any claim that is pending or threatened, either individually or on a combined basis, will not have a material adverse effect on our consolidated financial position, cash flows or results of operations. However, there can be no assurances that future costs related to legal proceedings would not be material to our results of operations or liquidity for a particular period.

8. Segment and Product Information

We offer an integrated solution to our customers providing manufacturing, supply, and installation of a full range of structural and related building products.  We provide a wide variety of building products and services directly to homebuilder customers. We manufacture floor trusses, roof trusses, wall panels, stairs, millwork, windows, and doors. We also provide a full range of construction services. These product and service offerings are distributed across approximately 396 locations operating in 40 states across the United States, which have been reorganized into nine geographical regions following the ProBuild acquisition.  Centralized financial and operational oversight, including resource allocation and assessment of performance on an income (loss) before income taxes basis, is performed by our CEO, whom we have determined to be our chief operating decision maker (“CODM”).    

As a result of the reorganization following the ProBuild acquisition, the Company has nine operating segments aligned with its nine geographical regions (Regions 1 through 9). While all of our operating segments have products, distribution methods and customers of a similar nature, certain of our operating segments have been aggregated due to also containing similar economic characteristics, resulting in the following composition of reportable segments:

In addition to our reportable segments, our consolidated results include corporate overhead, other various operating activities that are not internally allocated to a geographical region nor separately reported to the CODM, and certain reconciling items primarily related to allocations of corporate overhead and rent expense, which have collectively been presented as “All Other”.  The accounting policies of the segments are consistent with those referenced in Note 1, except for noted reconciling items.  

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The following tables present Net sales, income (loss) before income taxes and certain other measures for the reportable segments, reconciled to consolidated total continuing operations, for the periods indicated (in thousands):

Asset information by segment is not reported internally or otherwise reviewed by the CODM nor does the Company earn revenues or have long-lived assets located in foreign countries.  The Company’s net sales by product category for the periods indicated were as follows (in thousands):

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

The following discussion of our financial condition and results of operations should be read in conjunction with the Management’s Discussion and Analysis of Financial Condition and Results of Operations and the consolidated financial statements and notes thereto for the year ended December 31, 2015 included in our most recent annual report on Form 10-K. The following discussion and analysis should also be read in conjunction with the unaudited condensed consolidated financial statements appearing elsewhere in this report. In this quarterly report on Form 10-Q, references to the “company,” “we,” “our,” “ours” or “us” refer to Builders FirstSource, Inc. and its consolidated subsidiaries, including ProBuild Holdings, LLC (“ProBuild”), as of July 31, 2015, unless otherwise stated or the context otherwise requires.

Cautionary Statement

Statements in this report which are not purely historical facts or which necessarily depend upon future events, including statements regarding our anticipations, beliefs, expectations, hopes, intentions or strategies for the future, may be forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended. All forward-looking statements in this report are based upon information available to us on the date of this report. We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Any forward-looking statements made in this report involve risks and uncertainties that could cause actual events or results to differ materially from the events or results described in the forward-looking statements. Readers are cautioned not to place undue reliance on these forward-looking statements. In addition, oral statements made by our directors, officers and employees to the investor and analyst communities, media representatives and others, depending upon their nature, may also constitute forward-looking statements. As with the forward-looking statements included in this report, these forward-looking statements are by nature inherently uncertain, and actual results may differ materially as a result of many factors. Further information regarding the risk factors that could affect our financial and other results are included as Item 1A of our annual report on Form 10-K.

COMPANY OVERVIEW

We are a leading supplier of building materials, manufactured components and construction services to professional contractors, sub-contractors, and consumers. Following our acquisition of ProBuild in July 2015, the Company operates 396 locations in 40 states across the United States. Given the span and depth of our geographical reach, our locations are organized into nine geographical regions (Regions 1 through 9), which are also our operating segments, further aggregated into four reportable segments: Northeast, Southeast, South and West. All of our segments have similar customers, products and services, and distribution methods. Our financial statements contain additional information regarding segment performance which is discussed in Note 8 to the condensed consolidated financial statements included in Item 1 of this quarterly report on Form 10-Q.

We offer an integrated solution to our customers providing manufacturing, supply and installation of a full range of structural and related building products. Our manufactured products include our factory-built roof and floor trusses, wall panels and stairs, vinyl windows, custom millwork and trim, as well as engineered wood that we design, cut, and assemble for each home. We also assemble interior and exterior doors into pre-hung units. Additionally, we supply our customers with a broad offering of professional grade building products not manufactured by us, such as dimensional lumber and lumber sheet goods and various window, door and millwork lines. Our full range of construction-related services includes professional installation, turn-key framing and shell construction, and spans all our product categories.

We group our building products into six product categories:

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Our operating results are dependent on the following trends, events and uncertainties, some of which are beyond our control:

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RECENT DEVELOPMENTS

On February 12, 2016, we completed separate privately negotiated note exchange transactions in which $218.6 million in aggregate principal amount of our 10.75% senior unsecured notes due 2023 (“2023 notes”) was exchanged for $207.6 million in aggregate principal amount of our 7.625% senior secured notes due 2021 (“2021 notes”). On February 29, 2016, we completed additional separate privately negotiated note exchange transactions in which $63.8 million in aggregate principal amount of our 2023 notes was exchanged for $60.0 million in aggregate principal amount of our 2021 notes. The 2021 notes were issued under the existing indenture dated as of May 29, 2013.

Following these transactions $617.6 million in aggregate principal amount of our 2021 notes and $417.6 million in aggregate principal amount of our 2023 notes remain outstanding. These transactions resulted in a $7.8 million net gain on debt extinguishment, reducing interest expense in the first quarter of 2016. Further, these exchange transactions allowed the Company to reduce its long-term debt by approximately $14.8 million and reduce its annual cash interest expense by approximately $10.0 million.

CURRENT OPERATING CONDITIONS AND OUTLOOK

Though the level of housing starts remains below the historical average, the homebuilding industry has shown improvement since 2011. For the first quarter of 2016, actual U.S. single-family housing starts were 171,000, a 22.2% increase compared to the first quarter of 2015. U.S. single-family units under construction increased 18.0% during the first quarter of 2016 compared to the same quarter a year ago. While the housing industry has strengthened over the past few years, the limited availability of credit to smaller homebuilders and potential homebuyers, the high demand for skilled construction labor and the slow economic recovery, among other factors, have hampered a stronger recovery. A composite of third party sources, including the NAHB, are forecasting 818,000 U.S single family housing starts for 2016, which is an increase of 14.5% from 2015. In addition, the Home Improvement Research Institute (“HIRI”) is forecasting sales in the repair and remodel end market to increase approximately 4.7% in 2016 compared to 2015.

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Our net sales for the first quarter of 2016 were up 277% over the same period last year, approximately 265% of which was due to recent acquisitions, primarily the acquisition of ProBuild. Excluding the impact of recent acquisitions, we estimate net sales increased approximately 19% due to increased volume, which was partially offset by a 7% decrease due to the impact of commodity price deflation on net sales. Our gross margin percentage increased by 2.4% during the first quarter of 2016 compared to the first quarter of 2015. Our gross margin percentage increased primarily due to improved customer pricing, commodity price deflation and a higher mix of value-added sales. We made significant changes to our business during the downturn that have improved our operating efficiency and allowed us to better leverage our operating costs against changes in net sales. We intend to implement similar changes in ProBuild’s business activities to the extent feasible. However, our selling, general and administrative expenses, as a percentage of net sales, were 23.4% in the first quarter of 2016, a 1.0% increase from 22.4% in the first quarter of 2015. The increase was primarily due to the ProBuild acquisition and the resulting integration related costs, and to a lesser degree, the negative impact of commodity price deflation on our net sales.

We still believe that the long-term outlook for the housing industry is positive due to growth in the underlying demographics. We feel we are well-positioned to take advantage of the construction activity in our markets and to increase our market share, which may include strategic acquisitions. We will continue to focus on working capital by closely monitoring the credit exposure of our customers and by working with our vendors to improve our payment terms and pricing on our products. We will also continue to work diligently to achieve the appropriate balance of short-term expense control while maintaining the expertise and capacity to grow the business as market conditions improve. We want to create long-term shareholder value and avoid taking steps that will limit our ability to compete.

SEASONALITY AND OTHER FACTORS

Our first and fourth quarters have historically been, and are generally expected to continue to be, adversely affected by weather causing reduced construction activity during these quarters. In addition, quarterly results historically have reflected, and are expected to continue to reflect, fluctuations from period to period arising from the following:

The composition and level of working capital typically change during periods of increasing sales as we carry more inventory and receivables. Working capital levels typically increase in the second and third quarters of the year due to higher sales during the peak residential construction season. These increases have in the past resulted in negative operating cash flows during this peak season, which historically have been financed through available cash and borrowing availability under credit facilities. Collection of receivables and reduction in inventory levels following the peak building and construction season have in the past positively impacted cash flow.

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RESULTS OF OPERATIONS

The following table sets forth, for the three months ended March 31, 2016 and 2015, the percentage relationship to net sales of certain costs, expenses and income items:

Three Months Ended March 31, 2016 Compared with the Three Months Ended March 31, 2015

Net Sales. Net sales for the three months ended March 31, 2016 were $1,397.1 million, a 277% increase over net sales of $371.0 million for the three months ended March 31, 2015. Net sales increased $983.4 million, or approximately 265%, due to recent acquisitions, primarily ProBuild. Excluding the impact of acquisitions, we estimate net sales increased $42.7 million, or approximately 19% due to increased volume, which was partially offset by a 7% decrease due to the impact of commodity price deflation on net sales. According to the U.S. Census Bureau, actual U.S. single-family housing starts increased 22.2% and single-family units under construction increased 18.0% in the first quarter of 2016 compared to the first quarter of 2015.

The following table shows net sales classified by product category (dollars in millions):

Due to the ProBuild acquisition, we achieved increased net sales across all product categories.  Our sales classification by product categories has shifted as we diversified our product offerings to support a broader customer mix across 40 states through the ProBuild acquisition. Excluding ProBuild, net sales increased across all product categories primarily due to increased sales volume.

Gross Margin. Gross margin increased $266.0 million to $349.7 million. Of this increase, $251.0 million is due to the ProBuild acquisition. Excluding ProBuild, gross margin increased $15.0 million. Our gross margin percentage increased to 25.0% in the first quarter of 2016 from 22.6% in the first quarter of 2015, a 2.4% increase. Our gross margin percentage increased primarily due to improved customer pricing, commodity price deflation and a higher mix of value-added sales in the first quarter of 2016 compared to the first quarter of 2015.

Selling, General and Administrative Expenses.  Selling, general and administrative expenses increased $244.0 million, or 293.9% largely due to the ProBuild acquisition. Our salaries and benefits expense, excluding stock compensation expense, was $211.7 million, an increase of $163.3 million from the first quarter of 2015 primarily due to increased full time equivalent employees following the ProBuild acquisition. Delivery expense increased $34.1 million, office general and administrative expense increased $23.2 million, occupancy expense increased $18.9 million and intangible asset amortization increased $5.5 million. These increases were primarily a result of the ProBuild acquisition, the related integration activities and increased sales volume.

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As a percentage of net sales, selling, general and administrative expenses increased from 22.4% in the first quarter of 2015 to 23.4% in the first quarter of 2016. As a percentage of net sales, salaries and benefits expense, excluding stock compensation expense, increased 2.1%, intangible asset amortization expense increased 0.3% and occupancy expense increased 0.2%. These increases were partially offset by a 1.0% decrease in office general and administrative expense and a 0.1% decrease in delivery expense. The increase in selling, general and administrative expenses, as a percentage of net sales, was primarily due to the factors discussed above, and to a lesser degree, the negative impact of commodity price deflation on our net sales.

Interest Expense, Net. Interest expense was $35.2 million in the first quarter of 2016, an increase of $27.6 million from the first quarter of 2015. Of the $27.6 million increase, $27.7 million was attributable to increased interest expense largely due to our increased debt balances following the ProBuild acquisition financing, $8.5 million was related to non-cash interest expense primarily due to a $7.0 million write off of debt issuance costs on extinguished 2023 notes as a result of the debt exchange transactions in the first quarter of 2016 as well as increased debt discount and deferred loan cost amortization. These increases were partially offset by a $14.8 million gain on debt extinguishment as we reduced our outstanding principal as a result of the debt exchange transactions. The remaining change is primarily due to interest expense attributable to lease finance obligations assumed in the ProBuild acquisition.    

Income Tax Expense. We recorded income tax expense of $4.5 million and $0.2 million in the first quarters of 2016 and 2015, respectively. We recorded an increase in the after-tax, non-cash valuation allowance on our net deferred tax assets of $5.1 million and $3.1 million in the first quarters of 2016 and 2015, respectively. Absent the valuation allowance, our effective tax rate would have been 41.0% and 42.1% in the first quarters of 2016 and 2015, respectively.

Results by Reportable Segment

The following table shows net sales and income (loss) from continuing operations before income taxes by reportable segment (dollars in thousands):

As a result of our reorganization following the ProBuild acquisition, we now have four reportable segments based on an aggregation of the geographic regions in which we operate.  We achieved increased net sales and profitability across all our reportable segments, primarily due to the ProBuild acquisition. According to the U.S. Census Bureau actual single-family housing starts increased 22.2% in the first quarter of 2016 compared to the first quarter of 2015. Single-family housing starts increased 18.6% and 35.9% in the South region and Northeast region, respectively. Excluding the impact of recent acquisitions, including the ProBuild acquisition, net sales in the three months ended March 31, 2016 compared to the three months ended March 31, 2015 increased 8.0%, 26.3% and 4.0% in our Northeast, Southeast and South reportable segments, respectively, primarily due to volume increases, which were partially offset by commodity price deflation. The West reportable segment operations were acquired through the ProBuild acquisition.  

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LIQUIDITY AND CAPITAL RESOURCES

Our primary capital requirements are to fund working capital needs and operating expenses, meet required interest and principal payments, and to fund capital expenditures and potential future acquisitions. Our capital resources at March 31, 2016 consist of cash on hand and borrowing availability under our revolving credit facility.

Our $800.0 million senior secured revolving credit facility (“2015 facility”) will be primarily used for working capital, general corporate purposes, and funding acquisitions. In addition, we may use the 2015 facility to facilitate debt consolidation. Availability under the 2015 facility is determined by a borrowing base. Our borrowing base consists of trade accounts receivable, inventory, other receivables, including progress billings and credit card receivables, and qualified cash that all meet specific criteria contained within the credit agreement, minus agent specified reserves. Net excess borrowing availability is equal to the maximum borrowing amount minus outstanding borrowings and letters of credit.

The following table shows our borrowing base and excess availability as of March 31, 2016 and December 31, 2015 (in millions):  

As of March 31, 2016 we had $59.0 million in outstanding borrowings under our 2015 facility and our net excess borrowing availability was $619.1 million after being reduced by outstanding letters of credit of approximately $85.0 million. Excess availability must equal or exceed a minimum specified amount, currently $80.0 million, or we are required to meet a fixed charge coverage ratio of 1:00 to 1:00. We were not in violation of any covenants or restrictions imposed by any of our debt agreements at March 31, 2016.

Liquidity

Our liquidity at March 31, 2016 was $622.8 million, which consists of net borrowing availability under the 2015 facility and cash on hand.

We have substantially increased indebtedness following completion of the ProBuild acquisition in comparison to our indebtedness on a recent historical basis, which will increase our interest expense and could have the effect of, among other things, reducing our flexibility to respond to changing business and economic conditions. From time to time, based on market conditions and other factors and subject to compliance with applicable laws and regulations, the Company may repurchase or call the 2021 notes or 2023 notes, repay debt, or otherwise enter into transactions regarding its capital structure.

Should the current industry conditions deteriorate or we pursue additional acquisitions, we may be required to raise additional funds through the sale of common stock or debt in the public capital markets or in privately negotiated transactions. There can be no assurance that any of these financing options would be available on favorable terms, if at all. Alternatives to help supplement our liquidity position could include, but are not limited to, idling or permanently closing additional facilities, adjusting our headcount in response to current business conditions, attempts to renegotiate leases, and divesting of non-core businesses. There are no assurances that these steps would prove successful.

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Consolidated Cash Flows

Cash used in operating activities was $43.3 million for the three months ended March 31, 2016 compared to cash provided by operating activities of $9.9 million for the three months ended March 31, 2015.  Our working capital increased $60.6 million in the first three months of 2016 compared to a decrease of $11.2 million in the first three months of 2015. The change in working capital is largely due to the ProBuild acquisition, as well as seasonal increases in receivables and inventory, increased customer demand and a decrease in accrued liabilities. These increases were partially offset by an increase in accounts payable due to increased purchases and increased accounts payable days. Cash interest payments increased $54.4 million for the three months ended March 31, 2016 compared to the three months ended March 31, 2015. The remaining change is due to an increase in cash provided by operations is primarily related to increased sales and profitability during the three months ended March 31, 2016 as a result of higher sales volume and the acquisition of ProBuild.

Cash used in investing activities was $8.6 million and $14.9 million for the three months ended March 31, 2016 and 2015, respectively.  The change is primarily due to the acquisition of Timber Tech Texas, Inc. for $5.8 million during the three months ended March 31, 2015. There was no cash used for acquisitions during the three months ended March 31, 2016. Our capital expenditures during the three months ended March 31, 2016 were consistent with the three months ended March 31, 2015.

Cash used in financing activities was $9.5 million for the three months ended March 31, 2016 compared to cash provided by financing activities of $24.1 million for the three months ended March 31, 2015.  The change is primarily related to $25.0 million in borrowings on our previous revolving credit facility during the three months ended March 31, 2015 compared to a $1.0 million net repayment on our 2015 facility during the three months ended March 31, 2016. In addition, during the three months ended March 31, 2016 we paid $4.4 million in deferred loan costs related to the debt exchange transactions. We also repaid $1.4 million on our 2015 term loan during the three months ended March 31, 2016.

RECENT ACCOUNTING PRONOUNCEMENTS

In March 2016, the Financial Accounting Standards Board (“FASB”) issued an update to the existing guidance under the Compensation-Stock Compensation topic. This update simplifies several aspects of accounting for stock compensation including accounting for income taxes, classification of awards as liabilities or equity, forfeitures and classification on the statement of cash flows. This update is effective for public companies for annual and interim reporting periods beginning after December 15, 2016. Early adoption is permitted with adjustments reflected as of the beginning of the fiscal year of adoption. The various aspects of this guidance require prospective, retrospective, or modified retrospective application. We are currently evaluating the impact of this guidance on our financial statements.

In February 2016, the FASB issued an update to the existing guidance under Leases topic. Under the new guidance, lessees will be required to recognize the following for all leases, with the exception of short-term leases, at the commencement date: (1) a lease liability, which is a lessee‘s obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. This update requires a modified retrospective transition as of the beginning of the earliest comparative period presented in the financial statements. This update is effective for public companies for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. We are currently evaluating the impact of this guidance on our financial statements.

In July 2015 the FASB issued an update to the existing guidance under the Inventory topic of the Codification. This update changes the subsequent measurement of inventory from lower of cost or market to lower of cost and net realizable value. This guidance is effective for interim and annual reporting periods beginning after December 15, 2016. Early adoption of this guidance is permitted as of the beginning of an interim or annual reporting period. This guidance requires prospective application. We do not expect the adoption of this guidance to have an impact on our financial statements.

In August 2014, the FASB issued an update to the existing guidance under the Presentation of Financial Statements topic of the Codification. This update requires management to perform interim and annual assessments on whether there are conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern within one year of the date the financial statements are issued and to provide related disclosures, if required. This new guidance is effective for the annual period ending after December 15, 2016, and for annual and interim periods thereafter. Early adoption is permitted, but not required. We do not expect the adoption of this guidance to have an impact on our financial statements.

In May 2014, the FASB issued an update to the existing guidance under the Revenue Recognition topic of the Codification which is a comprehensive new revenue recognition model requiring a company to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.  This new guidance was originally effective for annual reporting periods beginning after December 15, 2016.

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However, in July 2015 the FASB approved an optional one year deferral of the effective date to annual reporting periods beginning after December 15, 2017.  As such, this guidance will be effective for us beginning on January 1, 2018. Early adoption is permitted; however, this guidance cannot be adopted earlier than the original effective date. This guidance allows either full retrospective or modified retrospective methods of adoption. We are currently evaluating the impact of this guidance on our financial statements.

Item  3. Quantitative and Qualitative Disclosures About Market Risk

We may experience changes in interest expense if changes in our debt occur. Changes in market interest rates could also affect our interest expense. Our 2021 notes and our 2023 notes bear interest at a fixed rate, therefore, our interest expense related to the 2021 notes and 2023 notes would not be affected by an increase in market interest rates. Borrowings under the 2015 facility and the 2015 term loan bear interest at either a base rate or eurodollar rate, plus, in each case, an applicable margin. At March 31, 2016, a 1.0% increase in interest rates would result in approximately $0.6 million in additional interest expense annually as we had $59.0 million in outstanding borrowings under the 2015 facility. The 2015 facility also assesses variable commitment and outstanding letter of credit fees based on quarterly average loan utilization. At March 31, 2016, a 1.0% increase in interest rates on the 2015 term loan would result in approximately $3.8 million in additional interest expense annually.

We purchase certain materials, including lumber products, which are then sold to customers as well as used as direct production inputs for our manufactured products that we deliver. Short-term changes in the cost of these materials and the related in-bound freight costs, some of which are subject to significant fluctuations, are sometimes, but not always, passed on to our customers. Our delayed ability to pass on material price increases to our customers can adversely impact our operating results.

Item 4. Controls and Procedures

Controls Evaluation and Related CEO and CFO Certifications. Our management, with the participation of our principal executive officer (“CEO”) and principal financial officer (“CFO”), conducted an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as of the end of the period covered by this quarterly report.

Certifications of our CEO and our CFO, which are required in accordance with Rule 13a-14 of the Securities Exchange Act of 1934, as amended (“Exchange Act”), are attached as exhibits to this quarterly report. This “Controls and Procedures” section includes the information concerning the controls evaluation referred to in the certifications, and it should be read in conjunction with the certifications for a more complete understanding of the topics presented.

Limitations on the Effectiveness of Controls. We do not expect that our disclosure controls and procedures will prevent all errors and all fraud. A system of controls and procedures, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the system are met. Because of the limitations in all such systems, no evaluation can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. Furthermore, the design of any system of controls and procedures is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions, regardless of how unlikely. Because of these inherent limitations in a cost-effective system of controls and procedures, misstatements or omissions due to error or fraud may occur and not be detected.

Scope of the Controls Evaluation. The evaluation of our disclosure controls and procedures included a review of their objectives and design, the Company’s implementation of the controls and procedures and the effect of the controls and procedures on the information generated for use in this quarterly report. In the course of the evaluation, we sought to identify whether we had any data errors, control problems or acts of fraud and to confirm that appropriate corrective action, including process improvements, were being undertaken if needed. This type of evaluation is performed on a quarterly basis so that conclusions concerning the effectiveness of our disclosure controls and procedures can be reported in our quarterly reports on Form 10-Q. Many of the components of our disclosure controls and procedures are also evaluated by our internal audit department, our legal department and by personnel in our finance organization. The overall goals of these various evaluation activities are to monitor our disclosure controls and procedures on an ongoing basis, and to maintain them as dynamic systems that change as conditions warrant.

Conclusions regarding Disclosure Controls. Based on the required evaluation of our disclosure controls and procedures, our CEO and CFO have concluded that, as of March 31, 2016, we maintain disclosure controls and procedures that are effective in providing reasonable assurance that information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our CEO and CFO, as appropriate, to allow timely decisions regarding required disclosure.

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Changes in Internal Control over Financial Reporting. During the period covered by this report, there have been no changes in our internal control over financial reporting identified in connection with the evaluation described above that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

On July 31, 2015, the Company acquired all of the operating affiliates of ProBuild Holdings, LLC (“ProBuild”). The Company is currently in the process of integrating ProBuild pursuant to the Sarbanes-Oxley Act of 2002. The Company is evaluating changes to processes, information technology systems and other components of internal controls over financial reporting as part of its ongoing integration activities, and as a result, controls will be periodically changed. The Company believes, however, it will be able to maintain sufficient controls over the substantive results of its financial reporting throughout this integration process.

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PART II  — OTHER INFORMATION

Item 1. Legal Proceedings

We are involved in various claims and lawsuits incidental to the conduct of our business in the ordinary course. We carry insurance coverage in such amounts in excess of our self-insured retention as we believe to be reasonable under the circumstances and that may or may not cover any or all of our liabilities in respect of claims and lawsuits. We do not believe that the ultimate resolution of these matters will have a material adverse impact on our consolidated financial position, cash flows or results of operations.

Although our business and facilities are subject to federal, state and local environmental regulation, environmental regulation does not have a material impact on our operations. We believe that our facilities are in material compliance with such laws and regulations. As owners and lessees of real property, we can be held liable for the investigation or remediation of contamination on such properties, in some circumstances without regard to whether we knew of or were responsible for such contamination. Our current expenditures with respect to environmental investigation and remediation at our facilities are minimal, although no assurance can be provided that more significant remediation may not be required in the future as a result of spills or releases of petroleum products or hazardous substances or the discovery of unknown environmental conditions.

Item  1A. Risk Factors

In addition to the other information set forth in this report, you should carefully consider the factors discussed in Part 1, “Item 1A. Risk Factors” in our annual report on Form 10-K for the year ended December 31, 2015, which could materially affect our business, financial condition or future results. The risks described in our annual report on Form 10-K are not the only risks facing our company. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially adversely affect our business, financial condition and/or operating results

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

Unregistered Sales of Equity Securities

(a)  None

Use of Proceeds

(b) Not applicable

Company Stock Repurchases

(c) The following table provides information with respect to our purchases of Builders FirstSource, Inc. common stock during the first quarter of fiscal year 2016:

The shares presented in the above table represent stock tendered in order to meet minimum withholding tax requirements for restricted stock units vested.

Item 3. Defaults Upon Senior Securities

(a) None

(b) None

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Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

(a) Disclosure pursuant to Section 13(r) of the Securities Exchange Act of 1934

Pursuant to Section 13(r) of the Securities Exchange Act of 1934, we may be required to disclose in our annual and quarterly reports to the SEC whether we or any of our “affiliates” knowingly engaged in certain activities, transactions or dealings relating to Iran or with certain individuals or entities targeted by U.S. economic sanctions. Disclosure is generally required even where the activities, transactions or dealings were conducted in compliance with applicable law. Because the SEC defines the term “affiliate” broadly, it includes any entity under common “control” with us (and the term “control” is also construed broadly by the SEC).

The description of the activities below has been provided to us by Warburg Pincus LLC (“WP”), affiliates of which: (i) beneficially own more than 10% of our outstanding common stock and are members of our board of directors and (ii) beneficially own more than 10% of the equity interests of, and have the right to designate members of the board of directors of, Santander Asset Management Investment Holdings Limited (“SAMIH”). SAMIH may therefore be deemed to be under common “control” with us.  However, this statement is not meant to be an admission that common control exists.

The disclosure below relates solely to activities conducted by SAMIH and its affiliates. The disclosure does not relate to any activities conducted by us or by WP and does not involve our or WP’s management. Neither we nor WP has had any involvement in or control over the disclosed activities.  Neither we nor WP has independently verified or participated in the preparation of the disclosure. Neither we nor WP is representing as to the accuracy or completeness of the disclosure nor do we or WP undertake any obligation to correct or update it.

We understand that one or more SEC-reporting affiliates of SAMIH intend to disclose in its next annual or quarterly SEC report that:

(a) Santander UK plc (“Santander UK”) holds two frozen savings accounts and two frozen current accounts for three customers resident in the United Kingdom (“U.K.”) who are currently designated by the United States (“U.S.”) under the Specially Designated Global Terrorist (“SDGT”) sanctions program.  The accounts held by each customer were blocked after the customer’s designation and have remained blocked and dormant through the first quarter of 2016. Revenue generated by Santander UK on these accounts in the first quarter of 2016 was £3.67, whilst net profits in the first quarter of 2016 were negligible relative to the overall profits of Banco Santander, S.A.

(b) An Iranian national, resident in the U.K., who is currently designated by the U.S. under the Iranian Financial Sanctions Regulations (“IFSR”) and the Weapons of Mass Destruction Proliferators Sanctions Regulations, holds a mortgage with Santander UK that was issued prior to any such designation. No further drawdown has been made (or would be allowed) under this mortgage, although Santander UK continues to receive repayment instalments. In the first quarter of 2016, total revenue generated by Santander UK in connection with the mortgage was £201.22, whilst net profits were negligible relative to the overall profits of Banco Santander, S.A. Santander UK does not intend to enter into any new relationships with this customer, and any disbursements will only be made in accordance with applicable sanctions. The same Iranian national also holds two investment accounts with Santander ISA Managers Limited. The funds within both accounts are invested in the same portfolio fund. The accounts have remained frozen during the first quarter of 2016. The investment returns are being automatically reinvested, and no disbursements have been made to the customer. Total revenue in the first quarter of 2016 generated by Santander UK in connection with the investment accounts was £4.89, whilst net profits in the first quarter of 2016 were negligible relative to the overall profits of Banco Santander, S.A.

(c) A U.K. national designated by the U.S. under the SDGT sanctions program holds a Santander UK current account. The account remained in arrears through the first quarter of 2016 (£1,344.01 in debit) and is currently being managed by Santander UK Collections & Recoveries department.

(d) In addition, during the first quarter of 2016, Santander UK has identified an OFAC match on a power of attorney account.  A party listed on the account is currently designated by the U.S. under the SDGT and IFSR sanctions programs. During the first quarter of 2016, related revenue generated by Santander UK was £73.81, whilst net profits in the first quarter of 2016 were negligible relative to the overall profits of Banco Santander, S.A.

(b) None

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Item 6.  Exhibits

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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.

May 6, 2016

May 6, 2016

May 6, 2016

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