10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended September 26, 2015

OR

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

For the transition period from                      to                     

Commission file numbers:

001-36873 (Summit Materials, Inc.)

333-187556 (Summit Materials, LLC)

SUMMIT MATERIALS, INC.

SUMMIT MATERIALS, LLC

(Exact name of registrants as specified in their charters)

Delaware (Summit Materials, Inc.)	47-1984212
Delaware (Summit Materials, LLC)	26-4138486
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
1550 Wynkoop Street, 3rd Floor Denver, Colorado	80202
(Address of principal executive offices)	(Zip Code)

Registrants’ telephone number, including area code: (303) 893-0012

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.

Summit Materials, Inc.	Yes  x    No  ¨
Summit Materials, LLC	Yes  ¨    No  x

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 (§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).

Summit Materials, Inc.	Yes  x    No  ¨
Summit Materials, LLC	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.

Summit Materials, Inc.

Large accelerated filer	¨	Accelerated filer	¨
Non-accelerated filer	x  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Summit Materials, LLC

Large accelerated filer	¨	Accelerated filer	¨
Non-accelerated filer	x  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Summit Materials, Inc.	Yes  ¨    No  x
Summit Materials, LLC	Yes  ¨    No  x

As of October 27, 2015, the number of shares of Summit Materials, Inc.’s outstanding Class A and Class B common stock, par value $0.01 per share for each class, was 49,009,738 and 69,007,297, respectively.

As of October 27, 2015, 100% of Summit Materials, LLC’s outstanding limited liability company interests were held by Summit Materials Intermediate Holdings, LLC, its sole member and an indirect subsidiary of Summit Materials, Inc.

EXPLANATORY NOTE

This quarterly report on Form 10-Q (this “report”) is a combined quarterly report being filed separately by two registrants: Summit Materials, Inc. and Summit Materials, LLC. Each registrant hereto is filing on its own behalf all of the information contained in this report that relates to such registrant. Each registrant hereto is not filing any information that does not relate to such registrant, and therefore makes no representation as to any such information. We believe that combining the quarterly reports on Form 10-Q of Summit Materials, Inc. and Summit Materials, LLC into this single report eliminates duplicative and potentially confusing disclosure and provides a more streamlined presentation since a substantial amount of the disclosure applies to both registrants.

Unless stated otherwise or the context requires otherwise, references to “Summit Inc.” mean Summit Materials, Inc., a Delaware corporation, and references to “Summit LLC” mean Summit Materials, LLC, a Delaware limited liability company. The references to Summit Inc. and Summit LLC are used in cases where it is important to distinguish between them. We use the terms “we,” “our,” “us” or “the Company” to refer to Summit Inc. and Summit LLC together with their respective subsidiaries, unless otherwise noted or the context otherwise requires.

Summit Inc. was formed on September 23, 2014 to be a holding company. As of September 26, 2015, its sole material asset was a 49.3% economic interest in Summit Materials Holdings L.P. (“Summit Holdings”). Summit Inc. has 100% of the voting rights of Summit Holdings, which is the indirect parent of Summit LLC. Summit LLC is a co-issuer of our outstanding 10 ¹/₂% senior notes due 2020 (the “2020 Notes”) and our 6^1/₈% senior notes due 2023 (the “2023 Notes”). Summit Inc.’s only revenue for the three and nine months ended September 26, 2015 is that generated by Summit LLC. Summit Inc. controls all of the business and affairs of Summit Holdings and, in turn, Summit LLC, as a result of its reorganization into a holding corporation structure (the “Reorganization”) consummated in connection with its initial public offering (“IPO”).

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This report includes “forward-looking statements” within the meaning of the federal securities laws, which involve risks and uncertainties. Forward-looking statements include all statements that do not relate solely to historical or current facts, and you can identify forward-looking statements because they contain words such as “believes,” “expects,” “may,” “will,” “should,” “seeks,” “intends,” “trends,” “plans,” “estimates,” “projects” or “anticipates” or similar expressions that concern our strategy, plans, expectations or intentions. All statements made relating to our estimated and projected earnings, margins, costs, expenditures, cash flows, growth rates and financial results are forward-looking statements. These forward-looking statements are subject to risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from future results, performance or achievements expressed or implied by such forward-looking statements. We derive many of our forward-looking statements from our operating budgets and forecasts, which are based upon many detailed assumptions. While we believe that our assumptions are reasonable, it is very difficult to predict the effect of known factors, and, of course, it is impossible to anticipate all factors that could affect our actual results. In light of the significant uncertainties inherent in the forward-looking statements included herein, the inclusion of such information should not be regarded as a representation by us or any other person that the results or conditions described in such statements or our objectives and plans will be realized. Important factors could affect our results and could cause results to differ materially from those expressed in our forward-looking statements, including but not limited to the factors discussed in the section entitled “Risk Factors” in Summit Inc.’s prospectus (the “Prospectus”), as filed with the Securities and Exchange Commission (the “SEC”) on August 7, 2015, any factors discussed in the section entitled “Risk Factors” of this report, and the following:

• our dependence on the construction industry and the strength of the local economies in which we operate;

• the cyclical nature of our business;

• risks related to weather and seasonality;

• risks associated with our capital-intensive business;

• competition within our local markets;

• our ability to execute on our acquisition strategy, successfully integrate acquisitions with our existing operations and retain key employees of acquired businesses;

• our dependence on securing and permitting aggregate reserves in strategically located areas;

• declines in public infrastructure construction and reductions in governmental funding, including the funding by transportation authorities and other state agencies;

• environmental, health, safety and climate change laws or governmental requirements or policies concerning zoning and land use;

• conditions in the credit markets;

• our ability to accurately estimate the overall risks, requirements or costs when we bid on or negotiate contracts that are ultimately awarded to us;

• material costs and losses as a result of claims that our products do not meet regulatory requirements or contractual specifications;

• cancellation of a significant number of contracts or our disqualification from bidding for new contracts;

• special hazards related to our operations that may cause personal injury or property damage not covered by insurance;

• our substantial current level of indebtedness;

• our dependence on senior management and other key personnel;

• interruptions in our information technology systems and infrastructure; and

• other factors as described in the Prospectus.

All subsequent written and oral forward-looking statements attributable to us, or persons acting on our behalf, are expressly qualified in their entirety by these cautionary statements.

Any forward-looking statement that we make herein speaks only as of the date of this report. We undertake no obligation to publicly update or revise any forward-looking statement as a result of new information, future events or otherwise, except as required by law.

CERTAIN DEFINITIONS

As used in this report, unless otherwise noted or the context otherwise requires:

• “Finance Corp” refers to Summit Materials Finance Corp., a wholly-owned indirect subsidiary of Summit LLC;

• “Sponsors” refers to certain investment funds affiliated with Blackstone Capital Partners V L.P. and Silverhawk Summit, L.P.;

• “Continental Cement” refers to Continental Cement Company, L.L.C.;

• “Alleyton” refers collectively to Alleyton Resource Company, LLC, Alcomat, LLC and Alleyton Services Company, LLC, formerly Alleyton Resource Corporation, Colorado Gulf, LP and certain assets of Barten Shepard Investments, LP.;

• “Mainland” refers to Mainland Sand & Gravel ULC, which is the surviving entity from the acquisition of Rock Head Holdings Ltd., B.I.M. Holdings Ltd., Carlson Ventures Ltd., Mainland Sand and Gravel Ltd. and Jamieson Quarries Ltd.;

• “Lafarge” refers to Lafarge North America Inc.;

• “Lewis & Lewis” refers to Lewis & Lewis, Inc.;

• “Davenport Assets” refer to a cement plant and quarry in Davenport, Iowa and seven cement distribution terminals along the Mississippi River; and

• “LeGrand” refers to LeGrand Johnson Construction Co.

SUMMIT MATERIALS, INC.

SUMMIT MATERIALS, LLC

FORM  10-Q

TABLE OF CONTENTS

		Page No.
PART I—Financial Information
Item 1.	Financial Statements for Summit Materials, Inc.		1
	Unaudited Consolidated Balance Sheets as of September 26, 2015 and December 27, 2014		1
	Unaudited Consolidated Statements of Operations for the three and nine months ended September 26, 2015 and September 27, 2014		2
	Unaudited Consolidated Statements of Comprehensive Income (Loss) for the three and nine months ended September 26, 2015 and September 27, 2014		3
	Unaudited Consolidated Statements of Cash Flows for the nine months ended September 26, 2015 and September 27, 2014		4
	Unaudited Consolidated Statements of Changes in Redeemable Noncontrolling Interest and Stockholders Equity for the nine months ended September 26, 2015 and September 27, 2014		5
	Notes to Unaudited Consolidated Financial Statements		6
	Financial Statements for Summit Materials, LLC		21
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		22
Item 3.	Quantitative and Qualitative Disclosures About Market Risk		41
Item 4.	Controls and Procedures		41
PART II — Other Information
Item 1.	Legal Proceedings		43
Item 1A.	Risk Factors		43
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds		43
Item 3.	Defaults Upon Senior Securities		43
Item 4.	Mine Safety Disclosures		43
Item 5.	Other Information		43
Item 6.	Exhibits		43
SIGNATURES			46

PART I—FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

SUMMIT MATERIALS, INC. AND SUBSIDIARIES

Unaudited Consolidated Balance Sheets

(In thousands, except share and per share amounts)

	September 26, 2015			December 27, 2014
Assets
Current assets:
Cash and cash equivalents	$	18,987		$	13,215
Accounts receivable, net		205,939			141,302
Costs and estimated earnings in excess of billings		34,175			10,174
Inventories		138,036			111,553
Other current assets		21,762			17,172
Total current assets		418,899			293,416
Property, plant and equipment, less accumulated depreciation, depletion and amortization (September 26, 2015 - $343,087 and December 27, 2014 - $279,375)		1,276,227			950,601
Goodwill		567,836			419,270
Intangible assets, less accumulated amortization (September 26, 2015 - $4,851 and December 27, 2014 - $3,073)		15,481			17,647
Other assets		51,798			48,843
Total assets	$	2,330,241		$	1,729,777
Liabilities, Redeemable Noncontrolling Interest and Stockholders’ Equity/Partners’ Interest
Current liabilities:
Current portion of debt	$	68,125		$	5,275
Current portion of acquisition-related liabilities		20,191			18,402
Accounts payable		113,226			78,854
Accrued expenses		90,880			101,496
Billings in excess of costs and estimated earnings		11,005			8,958
Total current liabilities		303,427			212,985
Long-term debt		1,148,068			1,059,642
Acquisition-related liabilities		41,978			42,736
Other noncurrent liabilities		114,575			93,691
Total liabilities		1,608,048			1,409,054
Commitments and contingencies (see note 12)
Redeemable noncontrolling interest		—			33,740
Stockholders’ equity/partners’ interest:
Class A common stock, par value $0.01 per share; 1,000,000,000 shares authorized, 49,009,738 shares issued and outstanding as of September 26, 2015		490			—
Class B common stock, par value $0.01 per share; 250,000,000 shares authorized, 69,007,297 shares issued and outstanding as of September 26, 2015		690			—
Partners’ interest		—			285,685
Additional paid-in capital		600,204			—
Accumulated earnings		4,355			—
Accumulated other comprehensive loss		(2,607	)		—
Stockholders’ equity/partners’ interest:		603,132			285,685
Noncontrolling interest in consolidated subsidiaries		1,271			1,298
Noncontrolling interest in Summit Materials, Inc.		117,790			—
Total stockholders’ equity/partners’ interest		722,193			286,983
Total liabilities, redeemable noncontrolling interest and stockholders’ equity/partners’ interest	$	2,330,241		$	1,729,777

See notes to unaudited consolidated financial statements.

1

SUMMIT MATERIALS, INC. AND SUBSIDIARIES

Unaudited Consolidated Statements of Operations

(In thousands, except share and per share amounts)

	Three months ended						Nine months ended
	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
Revenue:
Product	$	338,020		$	258,860		$	748,210		$	580,351
Service		88,266			89,276			182,224			196,214
Net revenue		426,286			348,136			930,434			776,565
Delivery and subcontract revenue		45,619			46,623			100,401			93,580
Total revenue		471,905			394,759			1,030,835			870,145
Cost of revenue (excluding items shown separately below):
Product		207,500			176,967			490,923			411,581
Service		59,280			61,907			128,514			140,773
Net cost of revenue		266,780			238,874			619,437			552,354
Delivery and subcontract cost		45,619			46,623			100,401			93,580
Total cost of revenue		312,399			285,497			719,838			645,934
General and administrative expenses		42,539			35,517			149,484			105,872
Depreciation, depletion, amortization and accretion		33,306			23,255			86,818			63,950
Transaction costs		304			2,741			8,044			7,737
Operating income		83,357			47,749			66,651			46,652
Other income, net		(1,171	)		(1,408	)		(678	)		(2,299	)
Loss on debt financings		32,641			—			64,313			—
Interest expense		20,727			22,085			62,231			62,555
Income (loss) from continuing operations before taxes		31,160			27,072			(59,215	)		(13,604	)
Income tax benefit		(2,655	)		(1,038	)		(12,468	)		(2,498	)
Income (loss) from continuing operations		33,815			28,110			(46,747	)		(11,106	)
Income from discontinued operations		(57	)		(7	)		(815	)		(356	)
Net income (loss)		33,872			28,117			(45,932	)		(10,750	)
Net income (loss) attributable to noncontrolling interest in subsidiaries		52			1,243			(1,917	)		674
Net income (loss) attributable to Summit Holdings		19,109		$	26,874			(48,370	)	$	(11,424	)
Net income attributable to Summit Materials, Inc.	$	14,711					$	4,355
Net income per share of Class A common stock:
Basic	$	0.39					$	0.14
Diluted	$	0.39					$	0.14
Weighted average shares of Class A common stock:
Basic		37,920,452						31,768,406
Diluted		37,963,930						31,811,315

See notes to unaudited consolidated financial statements.

2

SUMMIT MATERIALS, INC. AND SUBSIDIARIES

Unaudited Consolidated Statements of Comprehensive Income (Loss)

(In thousands)

	Three months ended						Nine months ended
	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
Net income (loss)	$	33,872		$	28,117		$	(45,932	)	$	(10,750	)
Other comprehensive (loss) income:
Postretirement curtailment adjustment		—			—			—			(1,346	)
Postretirement liability adjustment		—			—			—			2,164
Foreign currency translation adjustment		(6,296	)		(1,764	)		(11,531	)		(1,764	)
Loss on cash flow hedges		(1,010	)		—			(1,010	)		—
Other comprehensive loss		(7,306	)		(1,764	)		(12,541	)		(946	)
Comprehensive income (loss)		26,566			26,353			(58,473	)		(11,696	)
Less comprehensive income (loss) attributable to the noncontrolling interest in consolidated subsidiaries		52			1,243			(1,917	)		919
Less comprehensive income (loss) attributable to Summit Holdings		14,424		$	25,110			(58,304	)	$	(12,615	)
Comprehensive income attributable to Summit Materials, Inc.	$	12,090					$	1,748

See notes to unaudited consolidated financial statements.

3

SUMMIT MATERIALS, INC. AND SUBSIDIARIES

Unaudited Consolidated Statements of Cash Flows

(In thousands)

	Nine months ended
	September 26, 2015			September 27, 2014
Cash flow from operating activities:
Net loss	$	(45,932	)	$	(10,750	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, depletion, amortization and accretion		90,789			68,467
Share-based compensation expense		18,589			1,746
Deferred income tax benefit		—			(525	)
Net gain on asset disposals		(4,990	)		(219	)
Net gain on debt financings		(4,570	)		—
Other		136			(463	)
(Increase) decrease in operating assets, net of acquisitions:
Accounts receivable, net		(56,287	)		(54,463	)
Inventories		(3,830	)		(3,843	)
Costs and estimated earnings in excess of billings		(23,402	)		(15,009	)
Other current assets		(4,401	)		(3,910	)
Other assets		(524	)		(675	)
Increase (decrease) in operating liabilities, net of acquisitions:
Accounts payable		29,383			9,433
Accrued expenses		(12,272	)		2,578
Billings in excess of costs and estimated earnings		(763	)		270
Other liabilities		(853	)		(3,473	)
Net cash used in operating activities		(18,927	)		(10,836	)
Cash flow from investing activities:
Acquisitions, net of cash acquired		(505,466	)		(351,941	)
Purchases of property, plant and equipment		(69,672	)		(64,244	)
Proceeds from the sale of property, plant and equipment		8,883			9,575
Other		610			757
Net cash used for investing activities		(565,645	)		(405,853	)
Cash flow from financing activities:
Proceeds from equity offerings		1,037,444			—
Capital issuance costs		(61,218	)		—
Capital contributions by partners		—			24,350
Proceeds from debt issuances		1,415,750			657,217
Debt issuance costs		(10,911	)		(8,834	)
Payments on debt		(1,251,407	)		(258,337	)
Purchase of noncontrolling interests		(497,848	)		—
Payments on acquisition-related liabilities		(15,018	)		(5,807	)
Distributions from partnership		(26,448	)		—
Other		—			(88	)
Net cash provided by financing activities		590,344			408,501
Net increase (decrease) in cash		5,772			(8,188	)
Cash – beginning of period		13,215			18,184
Cash – end of period	$	18,987		$	9,996

See notes to unaudited consolidated financial statements.

4

SUMMIT MATERIALS, INC. AND SUBSIDIARIES

Unaudited Consolidated Statements of Changes in Redeemable Noncontrolling Interest and Stockholders’ Equity

(In thousands, except share amounts)

										Summit Materials, Inc.
	Redeemable Noncontrolling Interest			Partners’ Interest			Noncontrolling Interest in Subsidiaries			Accumulated Earnings		Accumulated Other Comprehensive Loss			Class A Common Stock				Class B Common Stock					Additional Paid-in Capital			Noncontrolling Interest in Summit Inc.			Total Stockholders’ Equity/Partners’ Interest
															Shares		Dollars		Shares			Dollars
Balance — December 27, 2014	$	33,740		$	285,685		$	1,298		$	—	$	—			—	$	—		—		$	—	$	—		$	—		$	286,983
Accretion/ redemption value adjustment		32,252			(32,252	)		—			—		—			—		—		—			—		—			—			(32,252	)
Net loss		(1,890	)		(41,338	)		(77	)		—		—			—		—		—			—		—			—			(41,415	)
Other comprehensive income		—			(5,249	)		—			—		—			—		—		—			—		—			—			(5,249	)
Share-based compensation		—			424			—			—		—			—		—		—			—		—			—			424
Balance - March 11, 2015	$	64,102		$	207,270		$	1,221		$	—	$	—			—	$	—		—		$	—	$	—		$	—		$	208,491
Recording of noncontrolling interest upon reorganization		—			(207,270	)		—			—		—			—		—		—			—		—			207,270			—
Net income (loss)		—			—			50			4,355		—			—		—		—			—		—			(7,032	)		(2,627	)
Issuance of Class A Shares		—			—			—			—		—			47,980,555		480		—			—		564,214						564,694
Issuance of Class B Shares		—			—			—			—		—			—		—		69,007,397			690		(690	)		—			—
Other comprehensive income		—			—			—			—		(2,607	)				—		—			—		—			(4,685	)		(7,292	)
Share repurchase		—			—			—			—		—			—		—		(100	)		—		—			—			—
Purchase of noncontrolling interests		(64,102	)		—			—			—		—			1,029,183		10		—			—		18,515			(51,315	)		(32,790	)
Share-based compensation		—			—			—			—		—			—		—		—			—		18,165			—			18,165
Distributions from partnership		—			—			—			—		—												—			(26,448	)		(26,448	)
Balance — September 26, 2015	$	—		$	—		$	1,271		$	4,355	$	(2,607	)		49,009,738	$	490		69,007,297		$	690	$	600,204		$	117,790		$	722,193
Balance — December 28, 2013	$	24,767		$	285,606		$	1,211		$	—	$	—			—	$	—		—		$	—	$	—		$	—		$	286,817
Contributed capital		—			24,350			—					—			—		—		—			—		—						24,350
Accretion/ redemption value adjustment		6,211			(6,211	)		—			—		—			—		—		—			—		—			—			(6,211	)
Net (loss) income		597			(11,424	)		77			—		—			—		—		—			—		—			—			(11,347	)
Other comprehensive income		245			(1,191	)		—			—		—			—		—		—			—		—			—			(1,191	)
Share-based compensation		—			1,750			—			—		—			—		—		—			—		—			—			1,750
Repurchase of member’s interest		—			(88	)		—			—		—			—		—		—			—		—			—			(88	)
Balance —September 27, 2014	$	31,820		$	292,792		$	1,288		$	—	$	—			—	$	—		—		$	—	$	—		$	—		$	294,080

See notes to unaudited consolidated financial statements.

5

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Tables in thousands, except share amounts)

1. SUMMARY OF ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES

Summit Materials, Inc. (“Summit Inc.” and, together with its subsidiaries, the “Company”) is a vertically-integrated construction materials company. The Company is engaged in the production and sale of aggregates, cement, ready-mixed concrete, asphalt paving mix and concrete products and owns and operates quarries, sand and gravel pits, two cement plants, cement distribution terminals, ready-mixed concrete plants, asphalt plants and landfill sites. It is also engaged in paving and related services. The Company is organized by geographic region and has three operating segments, which are also its reporting segments: the West; Central; and East regions.

Substantially all of the Company’s products and services are produced, consumed and performed outdoors, primarily in the spring, summer and fall. Seasonal changes and other weather-related conditions can affect the production and sales volumes of its products and delivery of services. Therefore, the financial results for any interim period are typically not indicative of the results expected for the full year. Furthermore, the Company’s sales and earnings are sensitive to national, regional and local economic conditions and to cyclical changes in construction spending, among other factors.

On September 23, 2014, Summit Inc. was formed as a Delaware corporation to be a holding company. Its sole material asset is a controlling equity interest in Summit Materials Holdings L.P. (“Summit Holdings”). Pursuant to a reorganization into a holding company structure (the “Reorganization”) consummated in connection with Summit Inc.’s March 2015 initial public offering, Summit Inc. became a holding corporation operating and controlling all of the business and affairs of Summit Holdings and its subsidiaries and, through Summit Holdings, conducts its business. Together with Summit Inc., certain investment funds affiliated with Blackstone Capital Partners V L.P. and Silverhawk Summit, L.P. (collectively, the “Sponsors”) are the primary owners of Summit Holdings.

Initial Public Offering—Summit Inc. commenced operations on March 11, 2015 upon the pricing of the initial public offering of its Class A common stock (“IPO”). Summit Inc. raised $433.0 million, net of underwriting discounts, through the issuance of 25,555,555 shares of Class A common stock at a public offering price of $18.00 per share. Summit Inc. used the offering proceeds to purchase a number of newly-issued Class A Units (“LP Units”) from Summit Holdings equal to the number of shares of Class A common stock issued to the public. Summit Inc. caused Summit Holdings to use these proceeds: (i) to redeem $288.2 million in aggregate principal amount of outstanding 10 ¹/₂% senior notes due January 31, 2020 (“2020 Notes”); (ii) to purchase 71,428,571 Class B Units of Continental Cement Company, L.L.C. (“Continental Cement”); (iii) to pay a one-time termination fee of $13.8 million primarily to affiliates of the Sponsors in connection with the termination of a transaction and management fee agreement; and (iv) for general corporate purposes. The $288.2 million redemption of 2020 Notes was completed in the second quarter of 2015 at a redemption price equal to par plus an applicable premium of $38.2 million plus $5.2 million of accrued and unpaid interest.

Follow-On Offering—On August 11, 2015, Summit Inc. raised $555.8 million, net of underwriting discounts, through the issuance of 22,425,000 shares of Class A common stock at a public offering price of $25.75 per share. Summit Inc. used these proceeds to purchase 3,750,000 newly-issued LP Units from Summit Holdings and 18,675,000 LP Units from certain of our pre-IPO owners, at a purchase price per LP Unit equal to the public offering price per share of Class A common stock, less underwriting discounts and commissions. Summit Holdings used the proceeds from the 3,750,000 newly-issued LP Units to pay the deferred purchase price of $80.0 million related to the July 17, 2015 acquisition of a cement plant and a quarry in Davenport, Iowa, and seven cement terminals along the Mississippi River (the “Davenport Assets”) and for general corporate purposes.

Basis of Presentation—These unaudited consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures typically included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The Company’s financial position as of December 27, 2014, the results of operations for the three and nine months ended September 27, 2014 and cash flows for the nine months ended September 27, 2014 reflect those of Summit Holdings. These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements of Summit Holdings and the notes thereto as of and for the year ended December 27, 2014. The Company continues to follow the accounting policies set forth in those consolidated financial statements.

Management believes that these consolidated interim financial statements include all adjustments, normal and recurring in nature, that are necessary to present fairly the financial position of the Company as of September 26, 2015, the results of operations for the three and nine months ended September 26, 2015 and September 27, 2014 and cash flows for the nine months ended September 26, 2015 and September 27, 2014. All significant intercompany balances and transactions have been eliminated.

6

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

The Company’s fiscal year is based on a 52-53 week year with each quarter composed of 13 weeks ending on a Saturday. The 53-week year occurs approximately once every seven years and will occur in 2015. The additional week in the 53-week year will be included in the fourth quarter.

The consolidated financial statements of the Company include the accounts of Summit Inc. and its subsidiaries, including noncontrolling interests. As a result of the Reorganization, Summit Holdings became a variable interest entity. Summit Inc. is the primary beneficiary of Summit Holdings as a result of its 100% voting power and control over Summit Holdings and its obligation to absorb losses and its right to receive benefits of Summit Holdings and thus consolidates Summit Holdings in its consolidated financial statements with a corresponding noncontrolling interest elimination of 72.2% between March 11, 2015 and August 11, 2015 and 50.7% between August 8, 2015 and September 26, 2015. Summit Inc.’s August 2015 purchase of 22,425,000 LP Units, 18,675,000 of which were previously held by certain of our pre-IPO owners, decreased the noncontrolling interest’s economic interest from 72.2% to 50.7%.

Noncontrolling interests in consolidated subsidiaries represent a 20% ownership in Ohio Valley Asphalt, LLC and, prior to the IPO and concurrent purchase of the noncontrolling interests of Continental Cement, a 30% redeemable ownership in Continental Cement.

Use of Estimates—Preparation of these consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities and reported amounts of revenue and expenses. Such estimates include the valuation of accounts receivable, inventories, goodwill, intangibles and other long-lived assets, pension and other postretirement obligations and asset retirement obligations. Estimates also include revenue earned on contracts and costs to complete contracts. Most of the Company’s paving and related services are performed under fixed unit-price contracts with state and local governmental entities. Management regularly evaluates its estimates and assumptions based on historical experience and other factors, including the current economic environment. Management adjusts such estimates and assumptions when circumstances dictate. As future events and their effects cannot be determined with precision, actual results can differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, are reflected in the Company’s consolidated financial statements when the change in estimate occurs.

Business and Credit Concentrations—The Company’s operations are conducted primarily across 18 U.S. states and in British Columbia, Canada, with the most significant revenue generated in Texas, Kansas, Kentucky, Utah and Missouri. The Company’s accounts receivable consist primarily of amounts due from customers within these areas. Therefore, collection of these accounts is dependent on the economic conditions in the aforementioned states, as well as specific situations affecting individual customers. Credit granted within the Company’s trade areas has been granted to many customers, and management does not believe that a significant concentration of credit exists with respect to any individual customer or group of customers. No single customer accounted for more than 10% of the Company’s total revenue in the three and nine months ended September 26, 2015 and September 27, 2014.

Earnings per Share—The Company computes basic earnings per share attributable to stockholders by dividing income attributable to Summit Inc. by the weighted-average shares of Class A common stock outstanding. Diluted earnings per share reflects the potential dilution beyond shares for basic earnings per share that could occur if securities or other contracts to issue common stock were exercised, converted into common stock, or resulted in the issuance of common stock that would have shared in the Company’s earnings. Since the Class B common stock has no economic value, those shares are not included in the weighted-average common share amount for basic or diluted earnings per share. In addition, as the shares of Class A common stock are issued by Summit Inc., the earnings and equity interests of noncontrolling interests are not included in basic or diluted earnings per share.

7

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

Fair Value Measurements—Certain acquisitions made by the Company require the payment of contingent amounts of purchase consideration. These payments are contingent on specified operating results being achieved in periods subsequent to the acquisition and will only be made if earn-out thresholds are achieved. Contingent consideration obligations are measured at fair value each reporting period. Any adjustments to fair value are recognized in earnings in the period identified. In the third quarter of 2015, the Company entered into interest rate derivatives on $200.0 million of its term loan borrowings to add stability to interest expense and to manage its exposure to interest rate movements. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive loss and will be subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The fair value of contingent consideration and derivatives as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015		December 27, 2014
Current portion of derivatives and acquisition-related liabilities:
Contingent consideration	$	4,559	$	2,375
Cash flow hedge		114
Derivatives and acquisition- related liabilities:
Contingent consideration	$	2,711	$	5,379
Cash flow hedge		897

The fair value of contingent consideration was based on unobservable, or Level 3, inputs, including projected probability-weighted cash payments and an 11.0% discount rate, which reflects a market discount rate. Changes in fair value may occur as a result of a change in actual or projected cash payments, the probability weightings applied by the Company to projected payments or a change in the discount rate. Significant increases or decreases in any of these inputs in isolation could result in a lower, or higher, fair value measurement. The fair value of the derivatives are based on observable, or Level 2, inputs such as interest rates, bond yields and prices in inactive markets. There were no material valuation adjustments in the three or nine months ended September 26, 2015 or September 27, 2014.

Financial Instruments—The Company’s financial instruments include debt and certain acquisition-related liabilities (deferred consideration and noncompete obligations). The carrying value and fair value of these financial instruments as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015				December 27, 2014
	Fair Value		Carrying Value		Fair Value		Carrying Value
Level 2
Long-term debt(1)	$	1,155,557	$	1,156,193	$	1,101,873	$	1,064,917
Level 3
Current portion of deferred consideration and noncompete obligations(2)		15,632		15,632		16,027		16,027
Long term portion of deferred consideration and noncompete obligations(3)		39,267		39,267		37,357		37,357

(1) $8.1 million and $5.3 million included in current portion of debt as of September 26, 2015 and December 27, 2014, respectively. Excludes $60.0 million outstanding on the revolving credit facility as of September 26, 2015.

(2) Included in current portion of acquisition-related liabilities on the balance sheet.

(3) Included in acquisition-related liabilities on the balance sheet.

The fair value of debt was determined based on observable, or Level 2, inputs, such as interest rates, bond yields and quoted prices in inactive markets. The fair values of the deferred consideration and noncompete obligations were determined based on unobservable, or Level 3, inputs, including the cash payment terms in the purchase agreements and a discount rate reflecting the Company’s credit risk.

8

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

Redeemable Noncontrolling Interest — On March 17, 2015, upon the consummation of the IPO and the transactions contemplated by a contribution and purchase agreement entered into with the holders of all of the outstanding Class B Units of Continental Cement, Continental Cement became a wholly-owned indirect subsidiary of Summit Inc. The noncontrolling interests of Continental Cement were acquired for aggregate consideration of $64.1 million, consisting of $35.0 million of cash, 1,029,183 shares of Summit Inc.’s Class A common stock and $15.0 million aggregate principal amount of non-interest bearing notes payable in six annual installments of $2.5 million, beginning on March 17, 2016.

New Accounting Standards — In April 2015, the FASB issued Accounting Standards Update (“ASU”) 2015-03, Simplifying the Presentation of Debt Issuance Costs, which changes the presentation of debt issuance costs in financial statements. Under the ASU, an entity will present such costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the costs will continue to be reported as interest expense. The ASU is effective for public entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The guidance will be applied retrospectively to all prior periods (i.e., the balance sheet for each period will be adjusted). Had the Company adopted this guidance as of the current period, both Other Assets (noncurrent) and Long-term Debt as of September 26, 2015 and December 27, 2014, would have decreased by $8.8 million and $16.8 million, respectively.

In April 2015, the FASB issued a new accounting standard, ASU 2015-04, Practical Expedient for the Measurement Date of an Employer’s Defined Benefit Obligation and Plan Assets, which gives an employer whose fiscal year-end does not coincide with a calendar month-end (e.g., an entity that has a 52- or 53-week fiscal year) the ability, as a practical expedient, to measure defined benefit retirement obligations and related plan assets as of the month-end that is closest to its fiscal year-end. The ASU is effective for public business entities for financial statements issued for fiscal years beginning after December 31, 2015, and interim periods within those fiscal years. Early application is permitted, and the ASU should be applied prospectively. The Company does not expect the adoption of this ASU to have a material effect on its financial position or results of operations.

In May 2014, the FASB issued a new accounting standard to improve and converge the financial reporting requirements for revenue from contracts with customers. ASU No. 2014-09, Revenue from Contracts with Customers, prescribes a five-step model for revenue recognition that will replace most existing revenue recognition guidance in U.S. GAAP. The ASU will supersede nearly all existing revenue recognition guidance under U.S. GAAP and provides that an entity recognize revenue when it transfers 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 update also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments, and assets recognized from costs incurred to obtain or fulfill a contract. ASU No. 2014-09 allows for either full retrospective or modified retrospective adoption. In July 2015, the FASB postponed the effective date of the new revenue standard by one year to the first quarter of 2018. Early adoption is permitted, but no earlier than 2017. Management is currently assessing the effect that the adoption of this standard will have on the consolidated financial statements.

Reclassifications — Certain amounts in the prior year have been reclassified to conform to the to the current period’s presentation.

2. REORGANIZATION

Prior to the IPO and Reorganization, the capital structure of Summit Holdings consisted of six different classes of limited partnership interests (Class A-1, Class A-2, Class B-1, Class C, Class D-1 and Class D-2), each of which was subject to unique distribution rights. There were no outstanding Class A-2 interests. In connection with the IPO and the Reorganization, the limited partnership agreement of Summit Holdings was amended and restated to, among other things, modify its capital structure by creating the LP Units, referred to as the “Reclassification.” Immediately following the Reclassification, 69,007,297 LP Units were outstanding. In addition, in substitution for part of the economic benefit of the Class C and Class D interests that was not reflected in the conversion of such interests to LP Units, warrants were issued to holders of Class C interests to purchase an aggregate of 160,333 shares of Class A common stock, and options were issued to holders of Class D interests to purchase an aggregate of 4,358,842 shares of Class A common stock (“leverage restoration options”). The exercise price of the warrants and leverage restoration options is the IPO price of $18.00 per share. In conjunction with the Reclassification of the equity-based awards, the Company recognized a $14.5 million modification charge in general and administrative costs.

The leverage restoration options were granted under the Summit Materials, Inc. 2015 Omnibus Incentive Plan (the “Omnibus Incentive Plan”). The leverage restoration options that correlate to time-vesting interests vest over four years, beginning on the Reclassification date and the leverage restoration options that correlate to performance-vesting interests vest only when both the relevant return multiple is achieved and a four year time-vesting condition is satisfied. The time-based vesting condition for both the time-vesting and performance-vesting interests will be satisfied with respect to 25% of the performance-vesting options on each of the first four anniversaries of the Reclassification date, subject to the employee’s continued employment through the applicable vesting date.

9

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

The Company also granted 240,000 options to purchase shares of Class A common stock under the Omnibus Incentive Plan to certain employees some of whom had not previously been granted equity-based interests. These stock options have an exercise price of $18.00 per share, the IPO price, and are subject to a time-based vesting condition that will be satisfied with respect to 25% of the award on each of the first four anniversaries of the grant date, subject to the employee’s continued employment through the applicable vesting date.

3. ACQUISITIONS

On July 17, 2015, the Company acquired the Davenport Assets for a purchase price of $450.0 million in cash and a cement distribution terminal in Bettendorf, Iowa. The operating results of the acquired business have been included in the Central region’s results of operations since the date of the acquisition. Assets acquired and liabilities assumed are measured at their acquisition-date fair value. Goodwill recognized in connection with the acquisition is primarily attributable to the expected profitability, assembled workforce and operational infrastructure of the acquired business and the synergies expected to result after its integration. The Davenport Assets were immediately integrated into the Company’s existing cement operations such that it is not practicable to report revenue and net income separately for the Davenport Assets.

Pro Forma Financial Information (unaudited) — The following unaudited supplemental pro forma information presents the financial results as if the Davenport Assets had been acquired on the first day of the 2014 fiscal year. This supplemental pro forma information has been prepared for comparative purposes and does not purport to be indicative of what would have occurred had the acquisition been made on the first day of the preceding fiscal year, nor is it indicative of any future results. The pro forma adjustments include a reduction of transaction costs of $6.5 million and additional depreciation, depletion, amortization and accretion of $7.5 million.

	Three months ended September 26, 2015		Nine months ended September 26, 2015
Revenue	$	477,706	$	1,069,305
Net income		27,649		26,764

The purchase price allocation for the Davenport Assets has not been finalized due to the recent timing of the acquisition. The following table summarizes aggregated information regarding the estimated fair values of the assets acquired and liabilities assumed in conjunction with the acquisition:

	September 26, 2015
Inventories	$	21,538
Property, plant and equipment		272,815
Other assets		6,537
Financial liabilities		(1,509	)
Other long-term liabilities		(95	)
Net assets acquired		299,286
Goodwill		150,710
Total consideration		449,996
Transfer of assets		(2,182	)
Working capital true-up		896
Net cash paid for acquisitions	$	448,710

10

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

4. GOODWILL

Changes in the carrying amount of goodwill, by reportable segment, from December 27, 2014 to September 26, 2015 are summarized as follows:

	West			Central		East		Total
Balance, December 27, 2014	$	297,085		$	96,025	$	26,160	$	419,270
Acquisitions (1)		4,579			150,929		—		155,508
Foreign currency translation adjustments		(6,942	)		—		—		(6,942	)
Balance, September 26, 2015	$	294,722		$	246,954	$	26,160	$	567,836

(1) Includes certain working capital adjustments related to 2014 acquisitions

5. ACCOUNTS RECEIVABLE, NET

Accounts receivable, net consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26, 2015			December 27, 2014
Trade accounts receivable	$	194,235		$	131,060
Retention receivables		13,396			12,053
Receivables from related parties		705			333
Accounts receivable		208,336			143,446
Less: Allowance for doubtful accounts		(2,397	)		(2,144	)
Accounts receivable, net	$	205,939		$	141,302

Retention receivables are amounts earned by the Company but held by customers until paving and related service contracts and projects are near completion or fully completed. Amounts are expected to be billed and collected within one year.

6. INVENTORIES

Inventories consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,		December 27,
	2015		2014
Aggregate stockpiles	$	90,776	$	88,211
Finished goods		11,284		8,826
Work in process		6,511		1,801
Raw materials		29,465		12,715
Total	$	138,036	$	111,553

11

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

7. ACCRUED EXPENSES

Accrued expenses consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26, 2015		December 27, 2014
Interest	$	12,973	$	32,475
Payroll and benefits		22,095		20,326
Capital lease obligations		16,065		17,530
Insurance		13,710		11,402
Non-income taxes		10,221		5,520
Professional fees		1,305		3,299
Other (1)		14,511		10,944
Total	$	90,880	$	101,496
(1)    Consists primarily of subcontractor and working capital settlement accruals.

8. DEBT

Debt consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26, 2015		December 27, 2014
Revolving credit facility	$	60,000	$	—
Long-term debt:
10 1/2% Senior Notes, due 2020:
$153.8 million senior notes, including a $5.5 million net premium at September 26, 2015 and $625.0 million senior notes, including a $26.5 million net premium at December 27, 2014		159,365		651,548
6 1/8% Senior Notes, due 2023:
$350.0 million senior notes, issued at par at September 26, 2015		350,000
Term Loan, due 2022:
$650.0 million term loan, net of $3.1 million discount at September 26, 2015 and $415.7 million term loan, net of $2.3 million discount at December 27, 2014		646,828		413,369
Total		1,156,193		1,064,917
Current portion of long-term debt		8,125		5,275
Long-term debt	$	1,148,068	$	1,059,642

12

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

The contractual payments of long-term debt, including current maturities, for the five years subsequent to September 26, 2015, are as follows:

2015 (three months)	$	3,250
2016		6,500
2017		6,500
2018		4,875
2019		6,500
2020		161,925
Thereafter		964,250
Total		1,153,800
Plus: Original issue net premium		2,393
Total debt	$	1,156,193

Senior Notes—The 2020 Notes were issued under an indenture dated January 30, 2012 (as amended and supplemented, the “2012 Indenture”) by Summit Materials, LLC (“Summit LLC”) and Summit Materials Finance Corp. (collectively, the “Issuers”). The Indenture contains covenants limiting, among other things, Summit LLC and its restricted subsidiaries’ ability to incur additional indebtedness or issue certain preferred shares, pay dividends, redeem stock or make other distributions, make certain investments, sell or transfer certain assets, create liens, consolidate, merge, sell or otherwise dispose of all or substantially all of the Company’s assets, enter into certain transactions with affiliates, and designate subsidiaries as unrestricted subsidiaries. The 2012 Indenture also contains customary events of default. Interest on the 2020 Notes is payable semi-annually in arrears. On September 8, 2014 and January 17, 2014, the Issuers issued an additional $115.0 million and $260.0 million, respectively, aggregate principal amount of 2020 Notes (the “Additional Notes”), receiving proceeds of $409.3 million, before payment of fees and expenses and including an aggregate $34.3 million premium. The proceeds from the sale of the Additional Notes were used for the purchases of acquisitions, to make payments on the revolving credit facility and for general corporate purposes. The Additional Notes are treated as a single series with the $250.0 million of 2020 Notes issued in January 2012 (the “Existing Notes”) and have substantially the same terms as those of the Existing Notes. The Additional Notes and the Existing Notes are treated as one class under the 2012 Indenture.

The Issuers issued $350.0 million in aggregate principal amount of 6.125% senior notes due July 15, 2023 (the “2023 Notes”) under an indenture dated July 28, 2015 (as amended and supplemented, the “2015 Indenture”). The net proceeds from the 2023 Notes, with proceeds from the refinancing of the term loan described below, were used to pay the $370.0 million initial purchase price for the Davenport Assets and to redeem $183.0 million aggregate principal amount of the 2020 Notes and pay related fees and expenses. The 2015 Indenture contains covenants and events of default generally consistent with the 2012 Indenture. The 2023 Notes were issued at 100% of their par value. Interest on the 2023 Notes is payable semi-annually in arrears on January 15 and July 15 of each year commencing on January 15, 2016. As of September 26, 2015 and December 27, 2014, the Company was in compliance with all covenants under both indentures, as applicable.

In April and August 2015, using proceeds from the IPO and the refinancing of the term loan described below, $288.2 million and $183.0 million, respectively, aggregate principal amount of the outstanding 2020 Notes were redeemed at a price equal to par plus an applicable premium. As a result of the redemptions, net charges of $14.1 million and $45.4 million were recognized in the three and nine months ended September 26, 2015, respectively. The fees included $18.2 million and $56.4 million for the applicable prepayment premium and $2.8 million and $7.5 million for the write-off of deferred financing fees, partially offset by $6.9 million and $18.5 million of net benefit from the write-off of the original issuance net premium in the three and nine months ended September 26, 2015, respectively.

Senior Secured Credit Facilities—Summit LLC has credit facilities that provide for term loans in an aggregate amount of $650.0 million and revolving credit commitments in an aggregate amount of $235.0 million (the “Senior Secured Credit Facilities”). Under the Senior Secured Credit Facilities, required principal repayments of 0.25% of term debt are due on the last business day of each March, June, September and December. The unpaid principal balance is due in full on the maturity date, which is July 17, 2022.

On July 17, 2015, Summit LLC refinanced its term loan under the Senior Secured Credit Facilities (the “Refinancing”). The Refinancing, among other things: (i) reduced the applicable margins used to calculate interest rates for term loans under our Senior Secured Credit Facilities to 3.25% for LIBOR rate loans and 2.25% for base rate loans, subject to a LIBOR floor of 1.00% (and one 25 basis point step down upon Summit LLC achieving a certain first lien net leverage ratio); (ii) increased term loans borrowed under our term loan facility from $422.0 million to an aggregate $650.0 million; and (iii) created additional flexibility under the financial maintenance covenants, which are tested quarterly, by increasing the applicable maximum Consolidated First Lien Net Leverage Ratio (as defined in the credit agreement governing the Senior Secured Credit Facilities).

13

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

On March 11, 2015, Summit LLC entered into Amendment No. 3 to the credit agreement governing the Senior Secured Credit Facilities, which became effective on March 17, 2015 upon the consummation of the IPO. The amendment: (i) increased the size of the revolving credit facility from $150.0 million to $235.0 million; (ii) extended the maturity date of the revolving credit facility to March 11, 2020; (iii) amended certain covenants; and (iv) permits periodic tax distributions as contemplated in a tax receivable agreement, dated as of March 11, 2015, with Summit Holdings. As a result of this amendment, a charge of $0.4 million of deferred financing was recognized in the nine months ended September 26, 2015.

The revolving credit facility bears interest per annum equal to, at Summit LLC’s option, either (i) a base rate determined by reference to the highest of (a) the federal funds rate plus 0.50%, (b) the prime rate of Bank of America, N.A. and (c) LIBOR plus 1.00%, plus an applicable margin of 2.0% for base rate loans or (ii) a LIBOR rate determined by reference to Reuters prior to the interest period relevant to such borrowing adjusted for certain additional costs plus an applicable margin of 3.0% for LIBOR rate loans. The interest rate in effect at September 26, 2015 was 3.2%.

There were $60.0 million of outstanding borrowings under the revolving credit facility as of September 26, 2015, leaving remaining borrowing capacity of $150.6 million, which is net of $24.4 million of outstanding letters of credit. The outstanding letters of credit are renewed annually and support required bonding on construction projects and the Company’s insurance liabilities.

Summit LLC’s Consolidated First Lien Net Leverage Ratio, as such term is defined in the Senior Secured Credit Facilities, should be no greater than 4.75:1.0 as of each quarter-end. As of September 26, 2015 and December 27, 2014, Summit LLC was in compliance with all covenants.

Summit LLC’s wholly-owned domestic subsidiary companies, subject to certain exclusions and exceptions, are named as subsidiary guarantors of the 2020 Notes, the 2023 Notes and the Senior Secured Credit Facilities. In addition, Summit LLC has pledged substantially all of its assets as collateral, subject to certain exclusions and exceptions, for the Senior Secured Credit Facilities.

Interest expense related to debt totaled $17.8 million and $54.6 million in the three and nine months ended September 26, 2015, respectively, and $19.9 million and $56.4 million in the three and nine months ended September 27, 2014, respectively. The following table presents the activity for the deferred financing fees for the nine months ended September 26, 2015 and September 27, 2014:

	Deferred financing fees
Balance — December 27, 2014	$	17,215
Loan origination fees		10,911
Amortization		(2,731	)
Write off of deferred financing fees		(12,135	)
Balance — September 26, 2015	$	13,260
Balance — December 28, 2013	$	11,485
Loan origination fees		9,281
Amortization		(2,875	)
Balance —September 27, 2014	$	17,891

Other—On January 15, 2015, the Company’s wholly-owned subsidiary in British Columbia, Canada entered into an agreement with HSBC for a (i) $6.0 million Canadian dollar (“CAD”) revolving credit commitment to be used for operating activities that bears interest per annum equal to the bank’s prime rate plus 0.20%, (ii) $0.5 million CAD revolving credit commitment to be used for capital equipment that bears interest per annum at the bank’s prime rate plus 0.90% and (iii) $0.4 million CAD revolving credit commitment to provide guarantees on behalf of that subsidiary. There were no amounts outstanding under this agreement as of September 26, 2015.

14

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

9. ACCUMULATED OTHER COMPREHENSIVE LOSS

The changes in each component of accumulated other comprehensive loss consisted of the following:

	Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance — December 27, 2014	$	—		$	—		$	—
Foreign currency translation adjustment		(2,109	)		—			(2,109	)
Loss on cash flow hedges		—			(498	)		(498	)
Balance — September 26, 2015	$	(2,109	)	$	(498	)	$	(2,607	)

10. INCOME TAXES

Summit Inc.’s tax provision includes its proportional share of Summit Holdings’ tax attributes. Summit Holdings’ subsidiaries are primarily limited liability companies, but do include certain entities organized as C corporations. The tax attributes related to the limited liability companies are passed on to Summit Holdings and then to its partners, including Summit Inc. The tax attributes associated with the C corporation subsidiaries are fully reflected in the Company’s accounts.

As of September 26, 2015 and December 27, 2014, Summit Inc. and its subsidiaries had not recognized any liabilities for uncertain tax positions. The Company records interest and penalties as a component of the income tax provision. No material interest or penalties were recognized in income tax expense during the three and nine months ended September 26, 2015 and September 27, 2014.

Summit Inc. — As of the IPO, Summit Inc. had a net deferred tax asset of $50.5 million, which primarily consisted of a $69.0 million temporary difference related to the tax intangible assets basis in excess of book, offset by the $6.9 million and $10.9 million book aggregate reserves and fixed assets in excess of tax basis, respectively.

Valuation Allowance—In assessing the realizability of deferred tax assets, including the deferred tax assets resulting from the expected taxable loss in 2015 and those generated under the tax receivable agreement, management determined that it was more likely than not that the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible and consideration of tax-planning strategies. Considering these factors, a full valuation allowance on $299.9 million of deferred tax assets as of September 26, 2015 was recorded, which has resulted in no provision for Summit Inc.’s income taxes in the three and nine months ended September 26, 2015.

Tax Receivable Agreement—Upon the consummation of the Reorganization, the Company entered into a tax receivable agreement with the holders of LP Units and certain other indirect pre-IPO owners (“Investor Entities”) that provides for the payment by Summit Inc. to exchanging holders of LP Units of 85% of the benefits, if any, that Summit Inc. is deemed to realize as a result of (i) increases in the tax basis of tangible and intangible assets of Summit Holdings and (ii) the utilization of certain net operating losses of the Investor Entities and certain other tax benefits related to entering into the tax receivable agreement, including tax benefits attributable to payments under the tax receivable agreement. In August 2015, 18,675,000 LP units were purchased by Summit Inc. resulting in an estimated $249.4 million deferred tax asset, approximately 85% of which is a liability due to the holders of the exchanged LP Units. As discussed above, a full valuation allowance was recognized on the deferred tax asset. As realization of the tax benefit is not currently deemed probable, the related liability to the former LP Unit holders is not considered probable and is not included in the consolidated balance sheet.

Tax Distributions – The holders of Summit Holdings’ LP Units, including Summit Inc., incur U.S. federal, state and local income taxes on their share of any taxable income of Summit Holdings. The limited partnership agreement of Summit Holdings provides for pro rata cash distributions (“tax distributions”) to the holders of the LP Units in an amount generally calculated to provide each holder of LP Units with sufficient cash to cover its tax liability in respect of the LP Units. In general, these tax distributions are computed based on Summit Holdings’ estimated taxable income allocated to each holder of LP Units multiplied by an assumed tax rate equal to the highest effective marginal combined U.S. federal, state and local income tax rate applicable to an individual or corporate resident in New York, New York (or a corporate resident in certain circumstances). Summit Holdings paid tax distributions totaling $23.5 million and $39.9 million, of which $14.6 million and $26.4 million were paid to its partners, other than Summit Inc., and $8.9 million and $13.5 million was paid to Summit Inc., in the three and nine months ended September 26, 2015, respectively.

15

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

C Corporation Subsidiaries —The effective income tax rate for the C corporations differs from the statutory federal rate primarily due to (1) tax depletion expense in excess of the expense recorded under U.S. GAAP, (2) state income taxes and the effect of graduated tax rates and (3) certain non-recurring items, such as differences in the treatment of transaction costs, which are often not deductible for tax purposes.

11. NET INCOME PER SHARE

Immediately prior to the consummation of the Company’s IPO, the Company did not have outstanding common stock. In conjunction with the IPO, Summit Inc. sold 25,555,555 shares of Class A shares common stock to the public and issued 1,029,183 shares of Class A common stock in conjunction with the purchase of the noncontrolling interest of Continental Cement. In connection with the follow on offering on August 11, 2015, Summit Inc. sold 22,425,000 shares of Class A common stock to the public, resulting in 49,009,738 shares of Class A common stock outstanding as of September 26, 2015. The 99,342,035 LP Units and 250,000 of outstanding stock options are excluded from the calculations as they would have an antidilutive effect.

The following table reconciles basic to diluted loss per share:

	September 26, 2015
	Three months ended		Nine months ended
Net income attributable to Summit Inc.	$	14,711	$	4,355
Weighted-average common shares:
Weighted average shares of Class A shares		37,920,452		31,768,406
Basic earnings per share	$	0.39	$	0.14
Weighted average shares of Class A shares		37,920,452		31,768,406
Warrants		43,478		42,909
Weighted average dilutive shares		37,963,930		31,811,315
Diluted earnings per share	$	0.39	$	0.14

Basic and diluted earnings per share for discontinued operations attributable to Summit Inc. were $0.00 and $0.01 in the three and nine months ended September 26, 2015.

12. COMMITMENTS AND CONTINGENCIES

The Company is party to certain legal actions arising from the ordinary course of business activities. Accruals are recorded when the outcome is probable and can be reasonably estimated. While the ultimate results of claims and litigation cannot be predicted with certainty, management expects that the ultimate resolution of all pending or threatened claims and litigation will not have a material effect on the Company’s consolidated results of operations, financial position or liquidity. The Company records legal fees as incurred.

Litigation and Claims—The Company is obligated under an indemnification agreement entered into with the sellers of Harper Contracting, Inc., Harper Sand and Gravel, Inc., Harper Excavating, Inc., Harper Ready Mix Company, Inc. and Harper Investments, Inc. (collectively, “Harper”) for the sellers’ 40% ownership interests in a joint venture agreement. The Company has the rights to any benefits under the joint venture as well as the assumption of any obligations, but does not own equity interests in the joint venture. The joint venture incurred significant losses on a highway project in Utah, which resulted in requests for funding from the joint venture partners and, ultimately, from the Company. Through September 26, 2015, the

16

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

Company has funded $8.8 million, of which $4.0 million was funded in 2012 and $4.8 million was funded in 2011. On April 2, 2015, the Utah Department of Transportation filed suit in the Fourth District Court of Utah County, Utah against the joint venture and the parties to the joint venture seeking damages of at least $29.4 million. As of September 26, 2015 and December 27, 2014, an accrual of $4.3 million was recorded in other noncurrent liabilities as management’s best estimate of loss related to this matter.

During the ordinary course of business, there may be revisions to project costs and conditions that can give rise to change orders on construction contracts. Revisions can also result in claims made against a customer or subcontractor to recover project variances that have not been satisfactorily addressed through change orders with a customer. The Company had unapproved change orders and claims of $1.2 million in accounts receivable and $3.9 million ($1.2 million in accounts receivable, $0.5 million in costs and estimated earnings in excess of billings and $2.2 million in other assets) as of September 26, 2015 and December 27, 2014, respectively.

Environmental Remediation—The Company’s operations are subject to and affected by federal, state, provincial and local laws and regulations relating to the environment, health and safety and other regulatory matters. These operations require environmental operating permits, which are subject to modification, renewal and revocation. The Company regularly monitors and reviews its operations, procedures and policies for compliance with these laws and regulations. Despite these compliance efforts, risk of environmental liability is inherent in the operation of the Company’s business, as it is with other companies engaged in similar businesses, and there can be no assurance that environmental liabilities or noncompliance will not have a material adverse effect on the Company’s consolidated financial position, results of operations or liquidity in the future.

Other — In the ordinary course of business, the Company enters into various firm purchase commitments for certain raw materials and services. The terms of the firm purchase commitments are generally less than one year. Management does not expect any significant changes in the market value of these goods and services during the commitment period that would have a material adverse effect on the financial position, results of operations or liquidity of the Company.

13. SUPPLEMENTAL CASH FLOW INFORMATION

Supplemental cash flow information is as follows:

	Nine months ended
	September 26, 2015			September 27, 2014
Cash payments:
Interest	$	75,990		$	59,179
Income taxes		1,516			1,345
Non cash financing activities:
Purchase of noncontrolling interest in Continental Cement	$	(29,102	)	$	—

17

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

14. SEGMENT INFORMATION

The Company has three operating segments, which are its reportable segments: the West; Central; and East regions. These segments are consistent with the Company’s management reporting structure. Each region’s operations consist of various activities related to the production, distribution and sale of construction materials, products and the provision of paving and related services. Assets employed by segment include assets directly identified with those operations. Corporate assets consist primarily of cash, property, plant and equipment for corporate operations and other assets not directly identifiable with a reportable business segment. The accounting policies applicable to each segment are consistent with those used in preparing the consolidated financial statements. The following tables display selected financial data for the Company’s reportable segments:

	Three months ended				Nine months ended
	September 26, 2015		September 27, 2014		September 26, 2015		September 27, 2014
Revenue:
West region	$	261,742	$	211,302	$	597,484	$	478,432
Central region		164,084		126,882		338,613		283,541
East region		46,079		56,575		94,738		108,172
Total revenue	$	471,905	$	394,759	$	1,030,835	$	870,145

	Three months ended						Nine months ended
	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
Adjusted EBITDA
West region	$	59,574		$	39,105		$	110,940		$	71,646
Central region		53,756			30,820			89,984			59,220
East region		13,383			11,868			15,096			10,462
Corporate and other		(8,879	)		(9,381	)		(33,577	)		(28,427	)
Total reportable segments and corporate		117,834			72,412			182,443			112,901
Interest expense		20,727			22,085			62,231			62,555
Depreciation, depletion, amortization and accretion		33,306			23,255			86,818			63,950
Initial public offering costs		—			—			28,296			—
Loss on debt financings		32,641			—			64,313			—
Income (loss) from continuing operations before taxes	$	31,160		$	27,072		$	(59,215	)	$	(13,604	)

	Nine months ended
	September 26, 2015		September 27, 2014
Cash paid for capital expenditures:
West region	$	32,192	$	25,496
Central region		24,335		28,485
East region		9,401		6,590
Total reportable segments		65,928		60,571
Corporate and other		3,744		3,673
Total capital expenditures	$	69,672	$	64,244

18

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

	Three months ended				Nine months ended
	September 26, 2015		September 27, 2014		September 26, 2015		September 27, 2014
Depreciation, depletion, amortization and accretion:
West region	$	13,786	$	9,155	$	38,508	$	23,569
Central region		15,778		9,710		37,198		28,061
East region		3,114		3,984		9,426		11,272
Total reportable segments		32,678		22,849		85,132		62,902
Corporate and other		628		406		1,686		1,048
Total depreciation, depletion, amortization and accretion	$	33,306	$	23,255	$	86,818	$	63,950

	September 26, 2015		December 27, 2014
Total assets:
West region	$	866,516	$	777,981
Central region		1,189,565		704,134
East region		224,720		221,598
Total reportable segments		2,280,801		1,703,713
Corporate and other		49,440		26,064
Total	$	2,330,241	$	1,729,777

	Three months ended						Nine months ended
	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
Revenue by product:*
Aggregates	$	86,070		$	68,636		$	218,336		$	160,002
Cement		68,481			34,171			110,477			69,435
Ready-mixed concrete		95,481			75,429			254,878			189,198
Asphalt		113,249			104,862			219,492			203,944
Paving and related services		185,092			191,157			366,321			391,925
Other		(76,468	)		(79,496	)		(138,669	)		(144,359	)
Total revenue	$	471,905		$	394,759		$	1,030,835		$	870,145

* Revenue by product includes intercompany and intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other. Revenue from the liquid asphalt terminals is included in asphalt revenue.

15. RELATED PARTY TRANSACTIONS

Under the terms of a transaction and management fee agreement between Summit Holdings and Blackstone Management Partners L.L.C. (“BMP”), whose affiliates include controlling stockholders of the Company, BMP provided monitoring, advisory and consulting services to the Company through March 17, 2015. Under the terms of the agreement, BMP was permitted to assign, and had assigned, a portion of the fees to which it was entitled to Silverhawk Summit, L.P. and to certain other equity investors.

The management fee was calculated based on the greater of $300,000 or 2.0% of the Company’s annual consolidated profit, as defined in the agreement, and is included in general and administrative expenses. The Company incurred management fees totaling $1.0 million during the period between December 28, 2014 and March 17, 2015 and $1.3 million and $2.3 million in the three and nine months ended September 27, 2014, respectively. During these periods, the Company paid immaterial amounts to Silverhawk Summit, L.P. and to other equity investors.

19

SUMMIT MATERIALS, INC.

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands, except share amounts)

Also under the terms of the transaction and management fee agreement, BMP undertook financial and structural analysis, due diligence investigations, corporate strategy and other advisory services and negotiation assistance related to acquisitions for which the Company paid BMP transaction fees equal to 1.0% of the aggregate enterprise value of any acquired entity or, if such transaction was structured as an asset purchase or sale, 1.0% of the consideration paid for or received in respect of the assets acquired or disposed. The Company paid BMP $0.6 million and $2.3 million during the three and nine months ended September 27, 2014, respectively. During these periods, the Company paid immaterial amounts to Silverhawk Summit, L.P. and to other equity investors. The acquisition-related fees paid pursuant to this agreement are included in transaction costs.

In connection with the IPO, the transaction and management fee agreement with BMP was terminated on March 17, 2015 for a final payment of $13.8 million; $13.4 million was paid to affiliates of BMP and the remaining $0.4 million was paid to affiliates of Silverhawk Summit, L.P. and to certain other equity investors.

In addition to the transaction and management fees paid to BMP, the Company reimburses BMP for direct expenses incurred, which were not material in the three and nine months ended September 26, 2015 and September 27, 2014.

On July 17, 2015, the Company purchased the Davenport Assets from Lafarge North America Inc. for $450.0 million in cash and a cement distribution terminal in Bettendorf, Iowa. At closing, $370.0 million of the purchase price was paid, and the remaining $80.0 million was paid on August 13, 2015. Summit Holdings entered into a commitment letter dated April 16, 2015, with Blackstone Capital Partners V L.P. (“BCP”) for equity financing up to $90.0 million in the form of a preferred equity interest (the “Equity Commitment Financing”), which would have been used to pay the $80.0 million deferred purchase price if other financing was not attained by December 31, 2015. For this Equity Commitment Financing, Summit Holdings paid a $1.8 million commitment fee to BCP in the nine months ended September 26, 2015.

Blackstone Advisory Partners L.P., an affiliate of BMP, served as an initial purchaser of $5.75 million and $13.0 million principal amount of the 2020 Notes issued in September 2014 and January 2014, respectively, and received compensation in connection therewith.

Cement sales to companies owned by a former noncontrolling member of Continental Cement were approximately $1.4 million during the period between December 28, 2014 and March 11, 2015 and $4.7 million and $10.9 million during the three and nine months ended September 27, 2014, respectively. Accounts receivable due from the former noncontrolling member were $0.2 million as of December 27, 2014.

In the nine months ended September 27, 2014, the Company made an interest payment of $0.7 million to a certain former noncontrolling member of Continental Cement for a related party note. The principal balance on the note was repaid in 2012.

In the nine months ended September 27, 2014, the Company sold certain assets associated with the production of concrete blocks, including inventory and equipment, to a related party for $2.3 million.

* * *

20

SUMMIT MATERIALS, LLC

UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

The unaudited consolidated financial statements and notes thereto for Summit Materials, LLC and subsidiaries are included as Exhibit 99.1 to this Quarterly Report on Form 10-Q and are incorporated by reference herein.

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

This Management’s Discussion and Analysis of Financial Condition and Results of Operations is intended to assist in understanding and assessing the trends and significant changes in our results of operations and financial condition. Historical results may not be indicative of future performance. Forward-looking statements reflect our current views about future events, are based on assumptions and are subject to known and unknown risks and uncertainties that could cause actual results to differ materially from those contemplated by these statements. Factors that may cause differences between actual results and those contemplated by forward-looking statements include, but are not limited to, those discussed in the section entitled “Risk Factors” in the Prospectus and any factors discussed in the sections entitled “Cautionary Note Regarding Forward-Looking Statements” and “Risk Factors” of this report. This Management’s Discussion and Analysis of Financial Condition and Results of Operations should be read in conjunction with our consolidated interim financial statements and the related notes and other information included in this report.

Overview

We are one of the fastest growing construction materials companies in the United States. Our materials include aggregates, which we supply across the country, with a focus on Texas, Kansas, Kentucky, Utah and Missouri, and cement, which we supply primarily in Missouri, Iowa and along the Mississippi River. Within our markets, we offer customers a single-source provider for construction materials and related downstream products through our vertical integration. In addition to supplying aggregates to customers, we use our materials internally to produce ready-mixed concrete and asphalt paving mix, which may be sold externally or used in our paving and related services businesses. Our vertical integration creates opportunities to increase aggregates volumes, optimize margin at each stage of production and provide customers with efficiency gains, convenience and reliability, which we believe gives us a competitive advantage.

We have completed 37 acquisitions, which are organized into 11 operating companies that make up our three distinct operating segments—West, Central and East regions—spanning 18 U.S. states and British Columbia, Canada and 33 metropolitan statistical areas. Our highly experienced management team, led by our President and Chief Executive Officer, Tom Hill, a 30-year industry veteran, has successfully enhanced the operations of acquired companies by focusing on scale advantages, cost efficiencies and pricing discipline to improve profitability and cash flow.

As of September 26, 2015, we had 2.1 billion tons of proven and probable aggregates reserves serving our aggregates and cement businesses and operated over 200 sites and plants, to which we believe we have adequate road, barge and/or railroad access. From time to time, in connection with certain acquisitions, we engage a third party engineering firm to perform an aggregates reserves audit, but we do not perform annual reserve audits.

22

We operate and currently have assets in 18 U.S. states and in British Columbia, Canada. The map below illustrates our geographic footprint:

Business Trends and Conditions

The U.S. construction materials industry is composed of four primary sectors: aggregates; cement; ready-mixed concrete; and asphalt paving mix. Each of these materials is widely used in most forms of construction activity. Competition is limited in part by the distance materials can be transported efficiently, resulting in predominantly local or regional operations. Participants in these sectors typically range from small, privately-held companies focused on a single material, product or market to multinational companies that offer a wide array of construction materials, products and related services. We estimate that approximately 65% of the aggregates in the United States are held by private companies.

23

Our revenue is derived from multiple end-use markets including private residential and nonresidential construction, as well as public infrastructure construction. Residential and nonresidential construction consists of new construction and repair and remodel markets. The construction sectors in the local economies in which we operate have begun to show signs of recovery. However, we could still be affected by any economic stagnation or decline, which could vary by local region and market. Our sales and earnings are sensitive to national, regional and local economic conditions and particularly to cyclical changes in construction spending, especially in the private sector. From a macroeconomic view, we see positive indicators for the construction sector, including upward trends in housing starts, construction employment and highway obligations. All of these factors should result in increased construction activity in the private sector. However, we do not expect this recovery to be consistent across the United States. Certain of our markets are showing greater, more rapid signs of recovery. Increased construction activity in the private sector could lead to increased public infrastructure spending in the relatively near future. Public infrastructure includes spending by federal, state and local governments for roads, highways, bridges, airports and other infrastructure projects. Public infrastructure projects have historically been a relatively stable portion of state and federal budgets. Our acquisitions to date have been primarily focused in states with certain constitutional protections for transportation funding sources, which we believe limits our exposure to state and local budgetary uncertainties.

Transportation infrastructure projects, driven by both federal and state funding programs, represent a significant share of the U.S. construction materials market. Federal funds are allocated to the states, which are required to match a portion of the federal funds they receive. Federal highway spending uses funds predominantly from the Federal Highway Trust Fund, which derives its revenue from taxes on diesel fuel, gasoline and other user fees. The dependability of federal funding allows the state departments of transportation to plan for their long term highway construction and maintenance needs. Funding for the existing federal transportation funding program extends through November 20, 2015. Any additional funding or successor programs have yet to be approved. With the nation’s infrastructure aging, we expect U.S. infrastructure spending to grow over the long term, and we believe we are well positioned to capitalize on any such increase.

In addition to federal funding, highway construction and maintenance funding is also available through state, county and local agencies. Our five largest states by revenue (Texas, Kansas, Kentucky, Utah and Missouri, which represented approximately 34%, 19%, 11%, 10% and 9%, respectively, of our total revenue in 2014) each have funds whose revenue sources have certain constitutional protections and are dedicated for transportation projects.

• Texas Department of Transportation’s budget from 2014 to 2016 is $25.3 billion.

• Kansas has a 10-year $8.2 billion highway bill that was passed in May 2010.

• Kentucky’s biennial highway construction plan has funding of $3.6 billion from July 2014 to June 2016.

• Utah’s transportation investment fund has $3.5 billion committed through 2018.

• Missouri has an estimated $0.7 billion in annual construction funding committed to essential road and bridge programs through 2017.

Within many of our markets, state and local governments have taken actions to maintain or grow highway funding during a time of uncertainty with respect to federal funding. For example:

• On November 4, 2014, voters in Texas passed a proposition that is estimated to provide up to $1.7 billion of incremental funding annually to the Texas Department of Transportation. The funds must be used for construction, maintenance, rehabilitation and acquiring right-of-way for public roads. The Texas legislature recently passed the largest two-year budget in the history of the Texas Department of Transportation (with growth in both new construction and maintenance).

• Increases in heavy truck registration fees, dedicated sales tax revenue and bond issuances have enabled Kansas to maintain stability in public infrastructure spending.

• We believe that public infrastructure spending in Kentucky, which comprises the majority of our revenue in the state, will remain consistent in the upcoming years.

• We expect primarily maintenance-related public demand in Utah and Missouri, both of which have recently completed large spending programs.

Use and consumption of our products fluctuate due to seasonality. Nearly all of the products used by us, and by our customers, in the private construction and public infrastructure industries are used outdoors. Our highway operations and production and distribution facilities are also located outdoors. Therefore, seasonal changes and other weather-related conditions, in particular extended rainy and cold weather in the spring and fall and major weather events, such as hurricanes, tornadoes, tropical storms and heavy snows, can adversely affect our business and operations through a decline in both the use of our products and demand for our services. In addition, construction materials production and shipment levels follow activity in the construction industry, which typically occurs in the spring, summer and fall. Warmer and drier weather during the second and third quarters of our fiscal year typically result in higher activity and revenue levels during those quarters.

24

We are subject to commodity price risk with respect to price changes in liquid asphalt and energy, including fossil fuels and electricity for aggregates, cement, ready-mixed concrete and asphalt paving mix production, natural gas for hot mix asphalt production and diesel fuel for distribution vehicles and production related mobile equipment. Liquid asphalt escalator provisions in most of our private and commercial contracts limit our exposure to price fluctuations in this commodity. We often obtain similar escalators on public infrastructure contracts. In addition, we enter into various firm purchase commitments, with terms generally less than one year, for certain raw materials. Through effective use of our purchase commitments and a year on year decline in prices, our costs associated with liquid asphalt and energy have decreased $10.5 million in the nine months ended September 26, 2015 as compared to the nine months ended September 27, 2014, taking into consideration organic and acquisition-related volume increases.

Backlog

Our products are generally delivered upon receipt of orders or requests from customers, or shortly thereafter. Accordingly, the backlog associated with product sales is converted into revenue within a relatively short period of time. Inventory for products is generally maintained in sufficient quantities to meet rapid delivery requirements of customers. Therefore, a period over period increase or decrease of backlog does not necessarily result in an improvement or a deterioration of our business. Our backlog includes only those products and projects for which we have obtained a purchase order or a signed contract with the customer and does not include products purchased and sold or services awarded and provided within the period. Subject to applicable contract terms, substantially all contracts in our backlog may be cancelled or modified by our customers. Historically, we have not been materially adversely affected by contract cancellations or modifications.

As a vertically-integrated business, approximately 26% of our aggregates sales volume was further processed and sold as a downstream product, such as ready-mixed concrete or asphalt paving mix and approximately 79% of the asphalt paving mix we sold was installed by our own paving crews during the nine months ended September 26, 2015. The following table sets forth, our backlog as of the indicated dates:

(in thousands)	September 26, 2015		September 27, 2014
Aggregate (in tons)		4,182		4,548
Asphalt (in tons)		2,261		2,831
Ready-mixed concrete (in cubic yards)		448		199
Construction services (1)	$	363,174	$	395,465

(1) The dollar value of the construction services backlog includes the value of the aggregate and asphalt tons and ready-mixed concrete cubic yards in backlog that are expected to be sourced internally.

Financial Highlights

The principal factors in evaluating our financial condition and operating results for the three and nine months ended September 26, 2015 as compared to the three and nine months ended September 27, 2014 are:

• Net revenue increased $78.2 million and $153.9 million in the three and nine months ended September 26, 2015, respectively, as a result of pricing and volume increases across our product lines, which includes volume contributions from our acquisitions.

• Our operating income increased $35.6 million and $20.0 million in the three and nine months ended September 26, 2015, respectively. The improvement in operating income was driven by improved pricing, reduced fuel costs and an increased proportion of sales generated by materials and products, as compared to services.

• In March 2015, we completed an IPO of Summit Inc.’s Class A common stock, the proceeds of which were used: (i) to redeem $288.2 million in aggregate principal amount of our outstanding 2020 Notes at a redemption price of 100% and an applicable premium thereon; (ii) to purchase a portion of the noncontrolling interests of Continental Cement; (iii) to pay a one-time fee of $13.8 million in connection with the termination of a transaction and management fee agreement; and (iv) for general corporate purposes.

• In August 2015, we completed a follow on offering of Summit Inc.’s Class A common stock. The proceeds were used to purchase 3,750,000 newly-issued LP Units from Summit Holdings and 18,675,000 outstanding LP Units from certain pre-IPO owners, including affiliates of the Sponsors and certain of our directors and officers. The entire $80.0 million deferred purchase price for the Davenport Assets was funded with the proceeds.

25

Acquisitions

In addition to our organic growth, we continued to grow our business through acquisitions, completing the following transactions in 2015 and 2014:

• On August 21, 2015, we acquired LeGrand Johnson Construction Co., a vertically integrated construction materials company based in Utah and servicing the northern and central Utah, western Wyoming and southern Idaho markets.

• On July 17, 2015, we completed the acquisition of the Davenport Assets, a cement plant and a quarry in Davenport, Iowa, and seven cement terminals along the Mississippi River . Our combined business has over two million short tons of cement capacity across our two plants in Hannibal, Missouri and Davenport, Iowa and eight cement distribution terminals along the Mississippi River from Minneapolis, Minnesota to New Orleans, Louisiana.

• On June 1, 2015, we acquired all of the issued and outstanding shares of Lewis & Lewis, Inc., a vertically integrated, aggregates-based business in Wyoming.

• On October 3, 2014, we purchased Concrete Supply, which included two sand and gravel sites and 10 ready-mixed concrete plants in Topeka and northeast Kansas, and a ready-mixed concrete plant in western Missouri.

• On September 30, 2014, we acquired all of the outstanding ownership interests in Colorado County Sand & Gravel Co., L.L.C. (“Colorado County S&G”), which is the surviving entity from the acquisition of Colorado County Sand & Gravel Co., L.L.C, M & M Gravel Sales, Inc., Marek Materials Co. Operating, Ltd. and Marek Materials Co., L.L.C.; which collectively supply aggregates to the west Houston, Texas markets.

• On September 19, 2014, we acquired all of the membership interests of Southwest Ready Mix, LLC. (“Southwest Ready Mix”), which included two ready-mixed concrete plants and serves the downtown and southwest Houston, Texas markets.

• On September 4, 2014, we acquired all of the issued and outstanding shares and certain shareholder notes of Rock Head Holdings Ltd. and B.I.M. Holdings Ltd., which collectively indirectly owned all the shares of Mainland Sand and Gravel Ltd., a supplier of construction aggregates to the Vancouver metropolitan area based in Surrey, British Columbia.

• On July 29, 2014, we acquired all of the assets of Canyon Redi-Mix, Inc. The acquired assets include two ready-mixed concrete plants, which serve the Permian Basin region of West Texas.

• On June 9, 2014, we acquired all of the membership interests of Buckhorn Materials, LLC (“Buckhorn Materials”), an aggregates quarry in South Carolina, and Construction Materials Group LLC, a sand pit in South Carolina.

• On March 31, 2014, we acquired all of the stock of Troy Vines, Incorporated (“Troy Vines”), an integrated aggregates and ready-mixed concrete business headquartered in Midland, Texas, which serves the Permian Basin region of West Texas.

• On January 17, 2014, we acquired certain aggregates and ready-mixed concrete assets of Alleyton in Houston, Texas, which expands our presence in the Texas market.

Results of Operations

The following discussion of our results of operations is focused on the key financial measures we use to evaluate the performance of our business from both a consolidated and operating segment perspective. Operating income and margins are discussed in terms of changes in volume, pricing and mix of revenue source (i.e., type of product sales or service revenue). We focus on operating margin, which we define as operating income as a percentage of revenue, as a key metric when assessing the performance of the business, as we believe that analyzing changes in costs in relation to changes in revenue provides more meaningful insight into the results of operations than examining costs in isolation.

Operating income (loss) reflects our profit (loss) from continuing operations after taking into consideration cost of revenue, general and administrative expenses, depreciation, depletion, amortization and accretion and transaction costs. Cost of revenue generally increases ratably with revenue, as labor, transportation costs and subcontractor costs are recorded in cost of revenue. General and administrative costs as a percentage of revenue vary throughout the year due to the seasonality of our business. As a result of our revenue growth occurring primarily through acquisitions, general and administrative costs and depreciation, depletion, amortization and accretion have historically grown ratably with revenue. However, as volumes increase, we expect these costs, as a percentage of revenue, to decrease. Our transaction costs fluctuate with the number and size of acquisitions completed each year.

26

The table below includes revenue and operating income (loss) by segment for the three and nine months ended September 26, 2015 and September 27, 2014.

	Three months ended										Nine months ended
	September 26, 2015					September 27, 2014					September 26, 2015					September 27, 2014
(in thousands)	Revenue		Operating income (loss)			Revenue		Operating income (loss)			Revenue		Operating income (loss)			Revenue		Operating income (loss)
West	$	261,742	$	45,894		$	211,302	$	29,629		$	597,484	$	72,829		$	478,432	$	47,658
Central		164,084		37,871			126,882		20,639			338,613		52,348			283,541		30,433
East		46,079		9,100			56,575		6,918			94,738		4,792			108,172		(1,925	)
Corporate (1)		—		(9,508	)		—		(9,437	)		—		(63,318	)		—		(29,514	)
Total	$	471,905	$	83,357		$	394,759	$	47,749		$	1,030,835	$	66,651		$	870,145	$	46,652

(1) Corporate results primarily consist of compensation and office expenses for employees included in the Company’s headquarters and $28.3 million of costs associated with the March 2015 IPO.

Non-GAAP Performance Measures

The performance of our business is evaluated based on several factors including measures we call Adjusted EBITDA and Gross Profit. We define Adjusted EBITDA as net income (loss) from continuing operations before income taxes, interest expense, depreciation, depletion, amortization and accretion, loss on debt financings and IPO costs. Adjusted EBITDA is determined before considering the loss from discontinued operations, loss on debt financings and IPO costs, as these amounts are not viewed by management as part of our core business when assessing the performance of our segments or allocation of resources. Accretion expense is recognized on our asset retirement obligations and reflects the time value of money. Given that accretion is similar in nature to interest expense, it is treated consistently with interest expense, and is excluded from Adjusted EBITDA. We define Gross Profit as operating income (loss) before general and administrative expenses, depreciation, depletion, amortization and accretion and transaction costs.

Adjusted EBITDA and Gross Profit are used by the chief operating decision maker, along with other factors, to allocate resources. These measures reflect an additional way of viewing aspects of our business that, when viewed with our results determined in accordance with U.S. GAAP and the accompanying reconciliations to U.S. GAAP financial measures included in the tables below, may provide a more complete understanding of factors and trends affecting our business. However, they should not be construed as being more important than other comparable U.S. GAAP measures and must be considered in conjunction with the U.S. GAAP measures. In addition, non-GAAP financial measures are not standardized; therefore, it may not be possible to compare such financial measures with other companies’ non-GAAP financial measures having the same or similar names. We strongly encourage investors to review our consolidated interim financial statements in their entirety and not rely on any single financial measure.

27

The tables below reconcile our net income (loss) to Adjusted EBITDA, present Adjusted EBITDA by segment and reconcile operating income to gross profit, for the three and nine months ended September 26, 2015 and September 27, 2014.

	Three months ended						Nine months ended
Reconciliation of Net Income (Loss) to Adjusted EBITDA	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
(in thousands)
Net income (loss) (1)	$	33,872		$	28,117		$	(45,932	)	$	(10,750	)
Interest expense (1)		20,727			22,085			62,231			62,555
Depreciation, depletion and amortization		32,940			23,032			85,689			63,302
Accretion		366			223			1,129			648
Income tax benefit		(2,655	)		(1,038	)		(12,468	)		(2,498	)
Initial public offering costs		—			—			28,296			—
Loss on debt financings		32,641			—			64,313			—
Income from discontinued operations		(57	)		(7	)		(815	)		(356	)
Adjusted EBITDA (1)	$	117,834		$	72,412		$	182,443		$	112,901
Adjusted EBITDA by Segment
(in thousands)
West	$	59,574		$	39,105		$	110,940		$	71,646
Central		53,756			30,820			89,984			59,220
East		13,383			11,868			15,096			10,462
Corporate		(8,879	)		(9,381	)		(33,577	)		(28,427	)
Adjusted EBITDA	$	117,834		$	72,412		$	182,443		$	112,901

(1) The reconciliation of net income (loss) to Adjusted EBITDA is based on the financial results of Summit Inc. Summit Inc.‘s net income (loss) in the three and nine months ended September 26, 2015 was $291 thousand and $582 thousand, respectively, less than Summit LLC’s due to interest expense associated with a deferred consideration obligation that is an obligation of Summit Holdings and is thus excluded from Summit LLC’s interest expense.

	Three months ended						Nine months ended
Reconciliation of Operating Income to Gross Profit	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
(in thousands)
Operating income	$	83,357		$	47,749		$	66,651		$	46,652
General and administrative expenses		42,539			35,517			149,484			105,872
Depreciation, depletion, amortization and accretion		33,306			23,255			86,818			63,950
Transaction costs		304			2,741			8,044			7,737
Gross Profit	$	159,506		$	109,262		$	310,997		$	224,211
Gross Margin1		37.4	%		31.4	%		33.4	%		28.9	%

(1) Gross margin, which we define as gross profit as a percentage of net revenue, improved 600 basis points and 450 basis points in the three and nine months ended September 26, 2015 primarily as a result of a shift in product mix. Our acquisitions in 2015 and 2014 were primarily materials and products businesses. As a result, and as shown in the table below, gross revenue from aggregates, cement and ready-mixed concrete was 21.2%, 10.7% and 24.7%, respectively, of total revenue in the nine months ended September 26, 2015 compared to 18.4%, 8.0% and 21.7%, respectively, in the nine months ended September 27, 2014. Gross revenue from paving and related services, which generally has lower operating margins than the materials and products, was 35.5% of total gross revenue in the nine months ended September 26, 2015 compared to 45.0% in the nine months ended September 27, 2014.

28

Consolidated Results of Operations

The table below sets forth our consolidated results of operations for the three and nine months ended September 26, 2015 and September 27, 2014.

	Three months ended						Nine months ended
(in thousands)	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
Net revenue	$	426,286		$	348,136		$	930,434		$	776,565
Delivery and subcontract revenue		45,619			46,623			100,401			93,580
Total revenue		471,905			394,759			1,030,835			870,145
Cost of revenue (excluding items shown separately below):		312,399			285,497			719,838			645,934
General and administrative expenses		42,539			35,517			149,484			105,872
Depreciation, depletion, amortization and accretion		33,306			23,255			86,818			63,950
Transaction costs		304			2,741			8,044			7,737
Operating income		83,357			47,749			66,651			46,652
Other income, net		(1,171	)		(1,408	)		(678	)		(2,299	)
Loss on debt financings		32,641			—			64,313			—
Interest expense (1)		20,727			22,085			62,231			62,555
Income (loss) from continuing operations before taxes		31,160			27,072			(59,215	)		(13,604	)
Income tax benefit		(2,655	)		(1,038	)		(12,468	)		(2,498	)
Income (loss) from continuing operations		33,815			28,110			(46,747	)		(11,106	)
Income from discontinued operations		(57	)		(7	)		(815	)		(356	)
Net income (loss) (1)	$	33,872		$	28,117		$	(45,932	)	$	(10,750	)

(1) The statement of operations above is based on the financial results of Summit Inc. Summit Inc.’s net income (loss) in the three and nine months ended September 26, 2015 was $291 thousand and $582 thousand, respectively, less than Summit LLC’s due to interest expense associated with a certain deferred consideration obligation that is an obligation of Summit Holdings and is thus excluded from Summit LLC’s interest expense.

Three and nine months ended September 26, 2015 compared to the three and nine months ended September 27, 2014

	Three months ended									Nine months ended
($ in thousands)	September 26, 2015			September 27, 2014			Variance			September 26, 2015			September 27, 2014			Variance
Net Revenue	$	426,286		$	348,136			22.4	%	$	930,434		$	776,565			19.8	%
Operating income		83,357			47,749			74.6	%		66,651			46,652			42.9	%
Operating margin		19.6	%		13.7	%					7.2	%		6.0	%
Adjusted EBITDA	$	117,834		$	72,412			62.7	%	$	182,443		$	112,901			61.6	%

Net revenue increased $78.2 million and $153.9 million in the three and nine months ended September 26, 2015, respectively, of which $49.1 million and $89.5 million, respectively, was from increased sales of materials and $30.1 million and $78.4 million, respectively, was from increased sales of products, partially offset by a $1.0 million and $14.0 million, respectively, decrease in service revenue. We had volume growth in our aggregates, cement and ready-mixed concrete lines of business, driven by the 2014 acquisitions and organic growth. We grew net revenue organically, excluding cement, by $9.6 million and $16.5 million in the three and nine months ended September 26, 2015, respectively. The Davenport Assets acquired in July 2015 were immediately integrated with our existing cement operations such that it is impracticable to bifurcate the $35.6 million and $44.7 million increase in cement revenue in the three and nine months ended September 26, 2015, respectively.

29

As a vertically-integrated company, we include intercompany sales from materials to products and from products to services when assessing the operating results of our business. We refer to revenue inclusive of intercompany sales as gross revenue. These intercompany transactions are eliminated in the consolidated financial statements. Gross revenue by line of business was as follows:

	Three months ended									Nine months ended
(in thousands)	September 26, 2015			September 27, 2014			Variance			September 26, 2015			September 27, 2014			Variance
Revenue by product:*
Aggregates	$	86,070		$	68,636		$	17,434		$	218,336		$	160,002		$	58,334
Cement		68,481			34,171			34,310			110,477			69,435			41,042
Ready-mixed concrete		95,481			75,429			20,052			254,878			189,198			65,680
Asphalt		113,249			104,862			8,387			219,492			203,944			15,548
Paving and related services		185,092			191,157			(6,065	)		366,321			391,925			(25,604	)
Other		(76,468	)		(79,496	)		3,028			(138,669	)		(144,359	)		5,690
Total revenue	$	471,905		$	394,759		$	77,146		$	1,030,835		$	870,145		$	160,690

* Revenue by product includes intercompany and intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other. Revenue from the liquid asphalt terminals is included in asphalt revenue.

Gross revenue for paving and related services decreased $6.1 million and $25.6 million in the three and nine months ended September 26, 2015, respectively, primarily as a result of decreased activity in Texas, Utah and Kansas. Detail of our volumes and average selling prices by product in the three and nine months ended September 26, 2015 and September 27, 2014 were as follows:

	Three months ended				Three months ended										Nine months ended				Nine months ended
	September 26, 2015				September 27, 2014				Percentage Change in						September 26, 2015				September 27, 2014				Percentage Change in
	Volume (1)		Pricing (2)		Volume (1)		Pricing (2)		Volume			Pricing			Volume (1)		Pricing (2)		Volume (1)		Pricing (2)		Volume			Pricing
Aggregates		9,127	$	9.43		7,488	$	9.17		21.9	%		2.8	%		23,949	$	9.12		17,684	$	9.05		35.4	%		0.8	%
Cement		669		102.30		378		90.43		77.0	%		13.1	%		1,100		100.44		773		89.86		42.3	%		11.8	%
Ready-mixed concrete		929		102.74		771		97.83		20.5	%		5.0	%		2,493		102.22		1,968		96.13		26.7	%		6.3	%
Asphalt		1,690		58.40		1,527		57.60		10.7	%		1.4	%		3,288		57.52		3,173		54.95		3.6	%		4.7	%

(1) Volumes are shown in thousands and in tons for aggregates, cement and asphalt and in cubic yards for ready-mixed concrete.

(2) Pricing is shown on a per ton basis for aggregates, cement and asphalt and on a per cubic yard basis for ready-mixed concrete.

Aggregates volumes were positively affected by the 2014 acquisitions. Aggregates pricing was affected by the U.S./Canadian exchange rate and product mix in the East region. Absent the effect of foreign currency fluctuations, aggregates pricing would have increased 4.0% in the nine months ended September 26, 2015.

Our cement volumes increased as a result of the July 2015 acquisition of the Davenport Assets and prices increased as a result of an improved market and a higher proportion of sales to low-volume customers. Ready-mixed concrete volumes were positively affected by the 2014 acquisitions in Texas and, to a lesser extent, in Kansas, and prices increased as a result of the improved cement pricing. Ready-mixed concrete volumes increased 26.7%, primarily driven by 2014 acquisitions in Texas and, to a lesser extent, in Kansas. Asphalt volumes and prices increased from the comparable periods. In 2014, asphalt volumes included a higher percentage of base materials. The increased pricing was largely due to a shift in product mix. Prior to eliminations, the net effect of these volume and pricing changes on gross revenue in the nine months ended September 26, 2015 was approximately $146.5 million and $34.1 million, respectively.

Operating income increased $35.6 million and $20.0 million in the three and nine months ended September 26, 2015, respectively, and Adjusted EBITDA improved $45.4 million and $69.5 million, respectively.

30

For the three months ended September 26, 2015 operating margin improved from 13.7% to 19.6%, which was attributable to the following:

Operating margin — 2014	13.7	%
Gross margin(1)	6.0	%
Other	(0.1	)%
Operating margin — 2015	19.6	%

(1) As noted above, gross margin improved primarily due to a shift in product mix. We completed the acquisition of the Davenport Assets on July 17, 2015 and, as a result, and as shown in the table above, gross revenue from cement, which has higher margins than our products and services, was 14.5% of total gross revenue in the three months ended September 26, 2015 compared to 8.7% in the three months ended September 27, 2014.

For the nine months ended September 26, 2015 operating margin increased from 6.0% to 7.2%, which was attributable to the following:

Operating margin — 2014	6.0	%
IPO costs(1)	(3.0	)%
Gross margin(2)	4.6	%
Other	(0.4	)%
Operating margin — 2015	7.2	%

(1) In conjunction with our March 2015 IPO, we recognized a $14.5 million charge on the modification of our share-based awards and a $13.8 million charge on the termination of a management fee agreement with our Sponsors. The management fee agreement was terminated on March 17, 2015.

(2) As noted above, gross margin improved primarily due to a shift in product mix. Our acquisitions in 2015 and 2014 were primarily materials and products businesses. As a result, and as shown in the table above, gross revenue from aggregates, cement and ready-mixed concrete was 21.2%, 10.7% and 24.7%, respectively, of total revenue in the nine months ended September 26, 2015 compared to 18.4%, 8.0% and 21.7%, respectively, in the nine months ended September 27, 2014. Gross revenue from paving and related services, which generally has lower operating margins than the materials and products, was 35.5% of total revenue in the nine months ended September 26, 2015 compared to 40.0% in the nine months ended September 27, 2014.

Other Financial Information

Loss on Debt Financings

In the three and nine months ended September 26, 2015, we recognized $32.6 million and $64.3 million, respectively, of losses associated with the March 2015 amendment to the credit agreement, the April 2015 $288.2 redemption of 2020 Notes and the August 2015 term loan refinancing, $350.0 million issuance of 2023 Notes and $183.0 million redemption of 2020 Notes.

Income tax benefit

The income tax benefit increased $1.6 million and $10.0 million in the three and nine months ended September 26, 2015, respectively, reflective of the tax benefit associated with the loss on debt financings that was recognized in our C corporations.

31

Segment results of operations

West Region

	Three months ended									Nine months ended
	September 26, 2015			September 27, 2014			Variance			September 26, 2015			September 27, 2014			Variance
($ in thousands)
Net Revenue	$	233,703		$	191,565			22.0	%	$	536,722		$	440,713			21.8	%
Operating income		45,894			29,629			54.9	%		72,829			47,658			52.8	%
Operating margin		19.6	%		15.5	%					13.6	%		10.8	%
Adjusted EBITDA	$	59,574		$	39,105			52.3	%	$	110,940		$	71,646			54.8	%

Net revenue in the West region increased approximately 22.0% and 21.8% in the three and nine months ended September 26, 2015, respectively, due primarily to acquisitions and organic volume growth. Incremental net revenue from acquisitions totaled $23.4 million and $70.0 million in the three and nine months ended September 26, 2015, respectively, and organic net revenue increased $18.7 million and $26.0 million, respectively. Gross revenue by product/service was as follows:

	Three months ended									Nine months ended
(in thousands)	September 26, 2015			September 27, 2014			Variance			September 26, 2015			September 27, 2014			Variance
Revenue by product:*
Aggregates	$	44,774		$	29,504		$	15,270		$	115,951		$	68,822		$	47,129
Ready-mixed concrete		70,791			59,192			11,599			194,822			148,444			46,378
Asphalt		73,897			62,287			11,610			145,191			125,988			19,203
Paving and related services		118,280			101,984			16,296			229,999			220,910			9,089
Other		(46,000	)		(41,665	)		(4,335	)		(88,479	)		(85,732	)		(2,747	)
Total revenue	$	261,742		$	211,302		$	50,440		$	597,484		$	478,432		$	119,052

* Revenue by product includes intercompany and intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other. Revenue from the liquid asphalt terminals is included in asphalt revenue.

Gross revenue for paving and related services increased by $16.3 million and $9.1 million in the three and nine months ended September 26, 2015, respectively. The West region’s percent changes in sales volumes and pricing in the three and nine months ended September 26, 2015 from the three and nine months ended September 27, 2014 were as follows:

	Three months ended Percentage Change in						Nine months ended Percentage Change in
	Volume			Pricing			Volume			Pricing
Aggregates		45.0	%		4.7	%		64.7	%		2.3	%
Ready-mixed concrete		12.9	%		5.8	%		22.6	%		7.1	%
Asphalt		18.6	%		4.2	%		6.2	%		8.3	%

32

Aggregates and ready-mixed concrete volume increases primarily occurred in Texas. Ready-mixed concrete prices increased as a result of higher cement prices in our markets. Asphalt volumes and pricing increased. In 2014, asphalt volumes included a higher percentage of base materials. The increased asphalt pricing was largely due to a shift in product mix. Prior to eliminations of intercompany transactions, the net effect of volume and pricing changes on gross revenue in the nine months ended September 26, 2015 was approximately $89.9 million and $22.8 million, respectively.

The West region’s operating income increased $16.3 million and $25.2 million in the three and nine months ended September 26, 2015, respectively, and Adjusted EBITDA improved $20.5 million and $39.3 million, respectively. The improvement was primarily driven by the inclusion of a half year of the 2014 acquisitions in the Houston and Midland/Odessa, Texas and British Columbia, Canada markets and organic volume growth.

Operating margin in the three months ended September 26, 2015 increased from 15.5% to 19.6%, which was attributable to the following:

Operating margin — 2014	15.5	%
Gross margin(1)	4.6	%
Other	(0.5	)%
Operating margin — 2015	19.6	%

(1) The operating margin improvement in the West region was primarily due to a shift in product mix. Our acquisitions in 2015 and 2014 were primarily materials and products businesses. As a result and as shown in the table above, gross revenue from aggregates was 17.1% of total revenue in the three months ended September 26, 2015, compared to 14.0% in the three months ended September 27, 2014.

In the nine months ended September 26, 2015 operating margin increased from 10.8% to 13.6%, which was attributable to the following:

Operating margin — 2014	10.8	%
Gross margin(1)	4.3	%
Other	(1.5	)%
Operating margin — 2015	13.6	%

(1) The operating margin improvement in the West region was primarily due to a shift in product mix. Our acquisitions in 2015 and 2014 were primarily materials and products businesses. As a result and as shown in the table above, gross revenue from aggregates was 19.4% of total revenue in the nine months ended September 26, 2015, compared to 14.4% in the nine months ended September 27, 2014. Gross revenue from paving and related services, which generally has lower operating margins than the materials and products, was 38.5% of total revenue in the nine months ended September 26, 2015, compared to 46.2% in the nine months ended September 27, 2014.

33

Central Region

	Three months ended									Nine months ended
	September 26, 2015			September 27, 2014			Variance			September 26, 2015			September 27, 2014			Variance
($ in thousands)
Net Revenue	$	151,722		$	110,962			36.7	%	$	309,478		$	247,793			24.9	%
Operating income		37,871			20,639			83.5	%		52,348			30,433			72.0	%
Operating margin		25.0	%		18.6	%					16.9	%		12.3	%
Adjusted EBITDA	$	53,756		$	30,820			74.4	%	$	89,984		$	59,220			51.9	%

Net revenue in the Central region increased $40.8 million and $61.7 million in the three and nine months ended September 26, 2015, respectively. Incremental net revenue from acquisitions, excluding the Davenport Assets, totaled $9.5 million and $20.3 million and organic net revenue, excluding cement, decreased $4.3 million and $3.3 million in the three and nine months ended September 26, 2015, respectively. The decrease in revenue was due to a decrease in paving and related services in Kansas. The Davenport Assets acquired in July 2015 were immediately integrated with our existing cement operations such that it is impracticable to bifurcate the $35.6 million and $44.7 million increase in cement revenue in the three and nine months ended September 26, 2015, respectively. Gross revenue by product/service was as follows:

	Three months ended									Nine months ended
(in thousands)	September 26, 2015			September 27, 2014			Variance			September 26, 2015			September 27, 2014			Variance
Revenue by product:*
Aggregates	$	27,151		$	25,038		$	2,113		$	67,063		$	60,537		$	6,526
Cement		68,481			34,171			34,310			110,477			69,435			41,042
Ready-mixed concrete		24,690			16,237			8,453			60,056			40,754			19,302
Asphalt		13,506			12,636			870			28,600			26,989			1,611
Paving and related services		34,589			46,136			(11,547	)		76,699			93,670			(16,971	)
Other		(4,333	)		(7,336	)		3,003			(4,282	)		(7,844	)		3,562
Total revenue	$	164,084		$	126,882		$	37,202		$	338,613		$	283,541		$	55,072

* Revenue by product includes intercompany and intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other. Revenue from the liquid asphalt terminals is included in asphalt revenue.

The $11.5 million and $17.0 million decrease in paving and related services was driven by decreased demand for our services in Kansas in the three and nine months ended September 26, 2015, respectively. The Central region’s percent changes in sales volumes and pricing in the three and nine months ended September 26, 2015 from the three and nine months ended September 27, 2014 were as follows:

	Three months ended Percentage Change in						Nine months ended Percentage Change in
	Volume			Pricing			Volume			Pricing
Aggregates		5.9	%		2.5	%		8.2	%		2.5	%
Cement		77.0	%		13.1	%		42.3	%		11.8	%
Ready-mixed concrete		47.9	%		3.0	%		41.8	%		3.9	%
Asphalt		0.0	%		(4.4	)%		1.6	%		(3.3	)%

In 2015, volumes increased among all of the Central region’s product lines. The increase in aggregates, cement and ready-mixed concrete revenue were driven by both volume and pricing growth. The volume increase in aggregates occurred primarily in Missouri. Our cement volumes increased as a result of the July 2015 acquisition of the Davenport Assets and prices increased as a result of an improved market and a higher proportion of sales to low-volume customers. The ready-mixed concrete prices benefited from the increased cement pricing. Asphalt volumes remained relatively consistent, while pricing declined due to lower commodity prices passed on to customers. Prior to eliminations of intercompany transactions, the net effect of volume and pricing changes on gross revenue in the nine months ended September 26, 2015 was approximately $57.0 million and $11.5 million, respectively.

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The Central region’s operating income increased $17.2 million and $21.9 million in the three and nine months ended September 26, 2015, respectively, and Adjusted EBITDA improved $22.9 million and $30.8 million, respectively. For the three months ended September 26, 2015 operating margin increased from 18.6% to 25.0%, which was attributable to the following:

Operating margin — 2014	18.6	%
Gross margin(1)	8.1	%
Other	(1.7	)%
Operating margin — 2015	25.0	%

(1) The operating margin improvement in the Central region was primarily due to a shift in product mix. Our acquisitions in 2015 and 2014 were primarily materials and products businesses. As a result and as shown in the table above, gross revenue from cement and ready-mixed concrete was 41.7% and 15.0%, respectively, of total revenue in the three months ended September 26, 2015, compared to 26.9% and 12.8%, respectively, in the three months ended September 27, 2014. Gross revenue from paving and related services, which generally has lower operating margins than the materials and products, was 21.1% of total revenue in the three months ended September 26, 2015, compared to 36.4% in the three months ended September 27, 2014.

For the nine months ended September 26, 2015 operating margin increased from 12.3% to 16.9%, which was attributable to the following:

Operating margin — 2014	12.3	%
Curtailment(1)	(0.4	)%
Gross margin(2)	4.7	%
Other	0.3	%
Operating margin — 2015	16.9	%

(1) A $1.3 million curtailment benefit was recognized in 2014 related to a retiree postretirement benefit plan maintained for certain union employees at our cement plant, which was amended to eliminate all future retiree health and life coverage for the remaining union employees, effective January 1, 2014.

(2) The gross margin improvement in the Central region was primarily due to a shift in product mix. Our acquisitions in 2015 and 2014 were primarily materials and products businesses. As a result and as shown in the table above, gross revenue from cement and ready-mixed concrete was 32.6% and 17.7%, respectively, of total revenue in the nine months ended September 26, 2015, compared to 24.5% and 14.4%, respectively, in the nine months ended September 27, 2014. Gross revenue from paving and related services, which generally has lower operating margins than the materials and products, was 22.7% of total revenue in the nine months ended September 26, 2015, compared to 33.0% in the nine months ended September 27, 2014.

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East Region

	Three months ended									Nine months ended
	September 26, 2015			September 27, 2014			Variance			September 26, 2015			September 27, 2014			Variance
($ in thousands)
Net Revenue	$	40,861		$	45,609			(10.4	)%	$	84,234		$	88,059			(4.3	)%
Operating income (loss)		9,100			6,918			31.5	%		4,792			(1,925	)		348.9	%
Operating margin		22.3	%		15.2	%					5.7	%		(2.2	)%
Adjusted EBITDA	$	13,383		$	11,868			12.8	%	$	15,096		$	10,462			44.3	%

The East region’s net revenue decreased 10.4% and 4.3% in the three and nine months ended September 26, 2015, respectively, primarily from decreased construction grading projects. Gross revenue by product/service was as follows:

	Three months ended									Nine months ended
(in thousands)	September 26, 2015			September 27, 2014			Variance			September 26, 2015			September 27, 2014			Variance
Revenue by product:*
Aggregates	$	14,145		$	14,094		$	51		$	35,322		$	30,643		$	4,679
Asphalt		25,846			29,939			(4,093	)		45,701			50,967			(5,266	)
Paving and related services		32,223			43,037			(10,814	)		59,623			77,345			(17,722	)
Other		(26,135	)		(30,495	)		4,360			(45,908	)		(50,783	)		4,875
Total revenue	$	46,079		$	56,575		$	(10,496	)	$	94,738		$	108,172		$	(13,434	)

* Revenue by product includes intercompany and intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other. Revenue from the liquid asphalt terminals is included in asphalt revenue.

The $10.8 million and $17.7 million decrease in paving and related services was driven by decreased demand for our services in Kentucky in the three and nine months ended September 26, 2015, respectively. The East region’s percent changes in sales volumes and pricing in the three and nine months ended September 26, 2015 from the three and nine months ended September 27, 2014 were as follows:

	Three months ended Percentage Change in						Nine months ended Percentage Change in
	Volume			Pricing			Volume			Pricing
Aggregates		(5.1	)%		5.8	%		12.6	%		2.3	%
Asphalt		(3.8	)%		(5.1	)%		(3.4	)%		(2.4	)%

Aggregate volumes in the nine months ended September 26, 2015 increased 12.6% as a result of the Buckhorn Materials acquisition on April 1, 2014; however, volumes in the three months ended September 26, 2015 were negatively affected by weather. Aggregates pricing increased as a result of an improved market and shift in product mix. Prior to eliminations of intercompany transactions, the net effect of volume and pricing changes on gross revenue in the nine months ended September 26, 2015 was approximately ($0.5) million and ($0.1) million, respectively.

The East region’s operating income increased $2.2 million and $6.7 million in the three and nine months ended September 26, 2015, respectively, and Adjusted EBITDA improved $1.5 million and $4.6 million, respectively. In the three and nine months ended September 26, 2015 operating margin increased from 15.2% to 22.3% and from (2.2)% to 5.7%, respectively, which was primarily attributable to the increased aggregate volumes.

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Liquidity and Capital Resources

Our primary sources of liquidity include cash on-hand, cash provided by operations and amounts available for borrowing under our credit facilities and capital-raising activities in the debt and capital markets. As of September 26, 2015, we had $19.0 million in cash and cash equivalents and $115.5 million of working capital compared to cash and working capital of $13.2 million and $80.4 million, respectively, at December 27, 2014. Working capital is calculated as current assets less current liabilities. There were no restricted cash balances as of September 26, 2015 or December 27, 2014. Our remaining borrowing capacity on our senior secured revolving credit facility was $150.6 million as of September 26, 2015, which is net of $24.4 million of outstanding letters of credit, and is fully available to us within the terms and covenant requirements of our credit agreement.

Given the seasonality of our business, we typically experience significant fluctuations in working capital needs and balances throughout the year. Our working capital requirements generally increase during the first half of the year as we build up inventory and focus on repair and maintenance and other set-up costs for the upcoming season. Working capital levels then decrease as the construction season winds down and we enter the winter months, which is when we see significant inflows of cash from the collection of receivables. For example, net cash used for operating activities in the nine months ended September 27, 2014 was $10.8 million, compared to full year 2014 net cash provided by operating activities of $79.1 million. Net cash used for operating activities in the nine months ended September 26, 2015 was $18.9 million.

We believe we have access to sufficient financial resources from our liquidity sources to fund our business and operations for at least the next twelve months, including contractual obligations, capital expenditures and debt service obligations. Our growth strategy contemplates future acquisitions for which we believe we have sufficient access to capital.

Indebtedness

Please refer to the notes to the consolidated interim financial statements for detailed information about our long-term debt, scheduled maturities of long-term debt and affirmative and negative covenants, including the maximum allowable consolidated first lien net leverage ratio. As of September 26, 2015, we were in compliance with all debt covenants.

At September 26, 2015 and December 27, 2014, $1,153.8 million and $1,040.7 million, respectively, of total debt, without giving effect to original issuance discount or premium, were outstanding under our respective debt agreements. Summit LLC has credit facilities that provide for term loans in an aggregate amount of $650.0 million and revolving credit commitments in an aggregate amount of $235.0 million (the “Senior Secured Credit Facilities”). Summit LLC’s domestic wholly-owned subsidiary companies are named as guarantors of the 2020 Notes and the 2023 Notes (collectively, the “Senior Notes”) and the Senior Secured Credit Facilities. Certain other partially-owned subsidiaries, and the wholly-owned Canadian subsidiary, Mainland, do not guarantee the Senior Notes. Summit LLC has pledged substantially all of its assets as collateral for the Senior Secured Credit Facilities. Summit LLC and its indirect wholly-owned subsidiary, Finance Corp, have issued $625.0 million aggregate principal amount of 2020 Notes due January 31, 2020 under an indenture dated as of January 30, 2012 (as amended and supplemented, the “Indenture”). We initially issued $250.0 million of 2020 Notes on January 30, 2012. We issued an additional $260.0 million and $115.0 million of 2020 Notes on January 17, 2014 and September 8, 2014, respectively, at a premium over par value, receiving aggregate proceeds of $409.3 million, before payment of fees and expenses. The proceeds from the January and September 2014 issuances were used for the purchases of Alleyton and Mainland, to make payments on the senior secured revolving credit facility and for general corporate purposes. Of this $625.0 million aggregate principal amount, $288.2 million was redeemed in April 2015 using proceeds from the IPO and $183.0 million was redeemed in August 2015, as discussed below.

On July 8, 2015, we issued $350.0 million in aggregate principal amount of 6.125% senior notes due July 15, 2023. The 2023 Notes were issued at par. Interest on the 2023 Notes is payable semi-annually on January 15 and July 15 of each year commencing on January 15, 2016.

On July 17, 2015, we refinanced our term loan under the Senior Secured Credit Facilities. The Refinancing, among other things: (i) reduced the applicable margins used to calculate interest rates for term loans under our Senior Secured Credit Facilities to 3.25% for LIBOR rate loans and 2.25% for base rate loans, subject to a LIBOR floor of 1.00% (and one 25 basis point step down upon Summit LLC achieving a certain first lien net leverage ratio); (ii) increased term loans borrowed under our term loan facility from $422.0 million to $650.0 million; and (iii) created additional flexibility under the financial maintenance covenants, which are tested quarterly, by increasing the applicable maximum Consolidated First Lien Net Leverage Ratio (as defined in our Credit Agreement).

We used the net proceeds from the 2023 Notes and the Refinancing to finance the initial $370.0 million cash purchase price for the Davenport Acquisition, to refinance our existing senior secured term loan facility, to redeem $183.0 million aggregate principal amount of our outstanding 2020 Notes and to pay related fees and expenses. The $183.0 million redemption of 2020 Notes occurred on August 3, 2015.

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Cash Flows

The following table summarizes our net cash used for or provided by operating, investing and financing activities and our capital expenditures in the nine months ended September 26, 2015 and September 27, 2014:

	Summit Inc.						Summit LLC
(in thousands)	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
Net cash (used for) provided by:
Operating activities	$	(18,927	)	$	(10,836	)	$	(18,927	)	$	(10,836	)
Investing activities		(565,645	)		(405,853	)		(565,645	)		(405,853	)
Financing activities (1)		590,344			408,501			576,839			408,501
Cash paid for capital expenditures	$	(69,672	)	$	(64,244	)	$	(69,672	)	$	(64,244	)

(1) Summit LLC’s net cash provided by financing activities was $13.5 million less than Summit Inc.’s reflective of tax distributions paid to Summit Inc.

Operating activities

During the nine months ended September 26, 2015, cash used in operating activities was $18.9 million primarily as a result of:

• Net loss of $45.9 million, adjusted for $100.0 million of non-cash expenses, including $90.8 million of depreciation, depletion, amortization and accretion and $18.6 million of share-based compensation expense.

• Additional investment in inventory of $3.8 million consistent with the seasonality of our business for which our inventory levels typically decrease in the fourth quarter in preparation for the winter slowdown.

• The timing of payments associated with accounts payable and accrued expenses contributed $17.1 million of cash in conjunction with the build-up of inventory levels and incurrence of repairs and maintenance costs to ready the business for increased sales volumes in the summer and fall. Almost all of our products are consumed and services provided outdoors. In addition, we made $76.0 million of interest payments in the nine months ended September 26, 2015.

• $79.7 million of increased accounts receivable (billed and unbilled) as a result of the seasonality of our business. The majority of our sales occur in the spring, summer and fall and we typically incur an increase in accounts receivable (net billed and unbilled) during the second and third quarters of each year. This amount is typically converted to cash in the fourth and first quarters.

During the nine months ended September 27, 2014, cash used in operating activities was $10.8 million primarily as a result of:

• Net loss of $10.8 million, adjusted for $69.0 million of non-cash expenses, including $68.0 million of depreciation, depletion, amortization and accretion.

• An increase in accounts receivable and costs and estimated earnings in excess of billings of $69.5 million, consistent with the seasonality of our business.

• Additional investment in inventory of $3.8 million consistent with the seasonality of our business.

• The timing of payments associated with accounts payable and accrued expenses contributed $12.0 million of cash in conjunction with the build-up of inventory levels and incurrence of repairs and maintenance costs.

Investing activities

During the nine months ended September 26, 2015, cash used for investing activities was $565.6 million, of which $505.5 million related to the 2015 acquisitions of the Davenport Assets, Lewis & Lewis and Legrand and $69.7 million was invested in capital expenditures, which was partially offset by $8.9 million of proceeds from asset sales.

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During the nine months ended September 27, 2014, cash used for investing activities was $405.9 million, $351.9 million of which related to the 2014 acquisitions of Alleyton, Troy Vines, Buckhorn Materials, Southwest Ready Mix, Colorado County S&G and Mainland. In addition, we invested $64.2 million in capital expenditures, offset by $9.6 million of proceeds from asset sales.

Financing activities

During the nine months ended September 26, 2015, cash provided by financing activities was $590.3 million, which was primarily composed of $1,037.4 million of proceeds from Summit Inc.’s IPO and follow-on offering. Summit Inc. utilized $35.0 million of the proceeds from the equity offerings to purchase the noncontrolling interest of Continental Cement and to purchase an aggregate 18,675,000 LP Units from certain of our pre-IPO owners. The remaining proceeds were contributed to Summit LLC to redeem $288.2 million aggregate principal amount of the outstanding 2020 Notes at a redemption price equal to par plus an applicable premium of $38.2 million and $5.2 million of accrued and unpaid interest. We also made $15.0 million of payments on acquisition related liabilities, paid $26.4 million of distributions to pre-IPO owners and paid $10.9 million in debt issuance costs

During the nine months ended September 27, 2014, cash provided by financing activities was $408.5 million, which was primarily composed of $398.9 million of net borrowings on debt. The Company issued $375.0 million of 2020 Notes in 2014 at a premium, receiving $409.3 million of aggregate proceeds. The funds from the borrowings were primarily used to purchase Alleyton and Mainland, make payments on the revolving credit facility and for general corporate purposes. In addition, we received contributions from our sole member of $24.4 million and made $5.8 million of payments on acquisition related liabilities in the nine months ended September 27, 2014.

Cash paid for capital expenditures

We expended approximately $67.9 million in capital expenditures in the nine months ended September 26, 2015 compared to $64.2 million in the nine months ended September 27, 2014. The 2015 capital expenditures were primarily composed of various pieces of equipment and rolling stock.

We estimate that we will invest between $80.0 million and $90.0 million in capital expenditures in 2015, which we have funded or expect to fund through cash on hand, cash from operations, outside financing arrangements and available borrowings under our revolving credit facility. In 2015, we continued investing in Texas, including approximately $6.4 million on installation of a new sand and gravel processing plant near Houston and $7.0 million on installation of a new asphalt plant in San Antonio.

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Contractual Obligations

The table below presents, as of September 26, 2015, our obligations and commitments to make future payments under contracts and contingent commitments.

Contractual Obligations	Total		2015 (three months)		2016		2017-2018		2019-2020		Thereafter
Short term borrowings and long-term debt, including current portion	$	1,153,800	$	3,250	$	6,500	$	11,375	$	168,425	$	964,250
Revolver		60,000		60,000		—		—		—		—
Capital lease obligations		52,873		10,742		10,561		23,592		3,357		4,621
Operating lease obligations		23,526		1,957		6,578		8,774		4,335		1,882
Interest payments (1)		386,326		12,797		65,767		107,914		108,236		91,612
Acquisition-related liabilities		80,384		3,413		20,684		27,459		14,924		13,904
Royalty payments		69,979		820		4,354		9,881		8,320		46,604
Defined benefit plans (2)		11,289		736		1,851		2,583		2,621		3,498
Asset retirement obligation payments		52,188		1,317		4,026		3,112		1,811		41,922
Purchase commitments (3)		21,732		5,865		15,867		—		—		—
Other		2,384		74		689		1,223		398		—
Total contractual obligations (4)	$	1,914,481	$	100,971	$	136,877	$	195,913	$	312,427	$	1,168,293

(1) Future interest payments were calculated using the applicable fixed and floating rates charged by our lenders in effect as of September 26, 2015 and may differ from actual results.

(2) Amounts represent estimated future payments to fund our defined benefit plans.

(3) Amounts represent purchase commitments entered into in the normal course of business, primarily for fuel purchases. Commitments are generally less than one year.

(4) Upon the consummation of the Reorganization, the Company entered into a tax receivable agreement with the holders of LP Units and certain other indirect pre-IPO owners (“Investor Entities”) that provides for the payment by Summit Inc. to exchanging holders of LP Units of 85% of the benefits, if any, that Summit Inc. is deemed to realize as a result of (i) increases in tax basis of the tangible and intangible assets of Summit Holdings resulting from future exchanges of LP Units for shares of Class A common stock and (ii) the utilization of certain net operating losses of the Investor Entities and certain other tax benefits related to entering into the tax receivable agreement, including tax benefits attributable to payments under the tax receivable agreement. We estimated that, as of the IPO date, and assuming that Summit Materials, Inc. had exercised its termination right associated with this benefit immediately following the IPO, the aggregate amount of the termination payments would be approximately $461.0 million. Estimating the amount of payments that may be made under the tax receivable agreement is by its nature imprecise, insofar as the calculation of amounts payable depends on a variety of factors. The increases in tax basis as a result of an exchange, as well as the amount and timing of any payments under the tax receivable agreement, will vary depending upon a number of factors.

In addition to the tax receivable agreement, the holders of Summit Holdings’ LP Units, including Summit Inc., incur U.S. federal, state and local income taxes on their share of any taxable income of Summit Holdings. The limited partnership agreement of Summit Holdings provides for pro rata cash distributions (“tax distributions”) to the holders of the LP Units in an amount generally calculated to provide each holder of LP Units with sufficient cash to cover its tax liability in respect of the LP Units. In general, these tax distributions are computed based on Summit Inc.’s estimate of the net taxable income of Summit Holdings allocated to each holder of LP Units multiplied by an assumed tax rate equal to the highest effective marginal combined U.S. federal, state and local income tax rate applicable to an individual or corporate resident in New York, New York (or a corporate resident in certain circumstances). We estimate the cash tax distribution payments to be $4.0 million for the remainder of 2015, $15.6 million in 2016 and $10.4 million in 2017. Estimating the tax distributions required under the limited partnership agreement is imprecise by its nature as the calculation depends on a variety of factors, including, but not limited to, projected taxable income of Summit Holdings and changes in ownership as a result of LP Units exchanges for shares of Class A common stock.

Commitments and contingencies

We are party to certain legal actions arising from the ordinary course of business activities. Accruals are recorded when the outcome is probable and can be reasonably estimated. While the ultimate results of claims and litigation cannot be predicted with certainty, management expects that the ultimate resolution of all current pending or threatened claims and litigation will not have a material effect on the Company’s consolidated results of operations, financial position or liquidity.

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We are obligated under an indemnification agreement entered into with the sellers of Harper Contracting, Inc., Harper Sand and Gravel, Inc., Harper Excavating, Inc., Harper Ready Mix Company, Inc. and Harper Investments, Inc. (collectively, “Harper”) for the sellers’ 40% ownership interests in a joint venture agreement. We have the rights to any benefits under the joint venture as well as the assumption of any obligations, but do not own equity interests in the joint venture. The joint venture incurred significant losses on a highway project in Utah, which resulted in requests for funding from the joint venture partners and, ultimately, from us. Through September 26, 2015, we have funded $8.8 million, of which $4.0 million was funded in 2012 and $4.8 million was funded in 2011. On April 2, 2015, the Utah Department of Transportation filed suit in the Fourth District Court of Utah County, Utah against the joint venture and the parties to the joint venture seeking damages of at least $29.4 million. As of September 26, 2015 and December 27, 2014, an accrual of $4.3 million was recorded in other noncurrent liabilities as our best estimate of loss related to this matter.

We are obligated under various firm purchase commitments for certain raw materials and services that are in the ordinary course of business. The terms of these firm purchase agreements are generally less than one year. Management does not expect any significant changes in the market value of these goods and services during the commitment period that would have a material adverse effect on the financial position, results of operations or liquidity of the Company.

Off-Balance sheet arrangements

As of September 26, 2015, we had no material off-balance sheet arrangements.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to certain market risks arising from transactions that are entered into in the normal course of business. Our operations are highly dependent upon the interest rate-sensitive construction industry as well as the general economic environment. These marketplaces could experience lower levels of economic activity in an environment of rising interest rates or escalating costs. For a discussion of quantitative and qualitative disclosures about market risk, please refer to the Prospectus.

ITEM 4. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

Summit Inc.

Summit Inc. maintains disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), that are designed to ensure that information required to be disclosed in Summit Inc.’s reports under the Exchange Act, 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 Summit Inc.’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. Any controls and procedures, no matter how well designed and operated, can provide only reasonable, not absolute, assurance of achieving the desired control objectives. Summit Inc.’s management, with the participation of its Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of Summit Inc.’s disclosure controls and procedures as of September 26, 2015. Based upon that evaluation, Summit Inc.’s Chief Executive Officer and Chief Financial Officer concluded that, as of September 26, 2015, Summit Inc.’s disclosure controls and procedures were effective to accomplish their objectives at the reasonable assurance level.

Summit LLC

Summit LLC maintains disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) that are designed to ensure that information required to be disclosed in Summit LLC’s reports under the Exchange Act, 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 Summit LLC’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. Any controls and procedures, no matter how well designed and operated, can provide only reasonable, not absolute, assurance of achieving the desired control objectives. Summit LLC’s management, with the participation of its Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of Summit LLC’s disclosure controls and procedures as of September 26, 2015. Based upon that evaluation, Summit LLC’s Chief Executive Officer and Chief Financial Officer concluded that, as of September 26, 2015, Summit LLC’s disclosure controls and procedures were effective to accomplish their objectives at the reasonable assurance level.

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Changes in Internal Control over Financial Reporting

Summit Inc.

There was no change in Summit Inc.’s internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during its last fiscal quarter that has materially affected, or is reasonably likely to materially affect, Summit Inc.’s internal control over financial reporting.

Summit LLC

There was no change in Summit LLC’s internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during its last fiscal quarter that has materially affected, or is reasonably likely to materially affect, Summit LLC’s internal control over financial reporting.

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PART II—OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

We are party to certain legal actions arising from the ordinary course of business activities. Accruals are recorded when the outcome is probable and can be reasonably estimated. While the ultimate results of claims and litigation cannot be predicted with certainty, management expects that the ultimate resolution of all current pending or threatened claims and litigation will not have a material effect on our results of operations, financial position or liquidity.

ITEM 1A. RISK FACTORS

In addition to the other information set forth in this report, you should carefully consider the factors discussed in the section entitled “Risk Factors” in the Prospectus, which could materially affect the Company’s business, financial condition, operating results or liquidity or future results. The risks described in the Prospectus are not the only risks facing the Company. Additional risks and uncertainties not currently known to the Company or that it currently deems to be immaterial also may materially adversely affect its results of operations, financial condition or liquidity. There have been no material changes to the risk factors disclosed in the Prospectus.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

None.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

The information concerning mine safety violations and other regulatory matters required by Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K (17 CFR 229.104) is included in Exhibit 95.1 to this report.

ITEM 5. OTHER INFORMATION

None.

ITEM 6. EXHIBITS

3.1	Amended and Restated Certificate of Incorporation of Summit Materials, Inc. (incorporated by reference to Exhibit 3.1 to Summit Materials, Inc.’s Current Report on Form 8-K filed on March 17, 2015).
3.2	Amended and Restated Bylaws of Summit Materials, Inc. (incorporated by reference to Exhibit 3.2 to Summit Materials, Inc.’s Current Report on Form 8-K filed on March 17, 2015).

43

3.3	Certificate of Formation of Summit Materials, LLC, as amended (incorporated by reference from Exhibit 3.1 to Summit Materials, LLC’s Registration Statement on Form S-4, filed March 27, 2013 (File No. 333-187556)).
3.4	Amended and Restated Limited Liability Company Agreement of Summit Materials, LLC (incorporated by reference from Exhibit 3.2 to Summit Materials, LLC’s Registration Statement on Form S-4, filed March 27, 2013 (File No. 333-187556)).
4.1	Tenth Supplemental Indenture, dated as of July 17, 2015, among Kilgore Partners, L.P., Lewis & Lewis, Inc., Summit Materials, LLC and Wilmington Trust, National Association, as trustee (incorporated by reference to Exhibit 4.11 to Summit Materials, Inc.’s Registration Statement on Form S-1, filed July 27, 2015 (File No. 333-205561)).
4.2	Indenture dated as of July 8, 2015, among Summit Materials, LLC, Summit Materials Finance Corp., the guarantors named therein and Wilmington Trust, National Association, as trustee (incorporated by reference to Exhibit 4.1 filed with the Registrants’ Current Report on Form 8-K filed on July 8, 2015 (File No. 001-36873)).
4.3	First Supplemental Indenture, dated as of July 17, 2015, among Kilgore Partners, L.P., Lewis & Lewis, Inc., Summit Materials, LLC and Wilmington Trust, National Association, as trustee (incorporated by reference to Exhibit 4.14 to Summit Materials, Inc.’s Registration Statement on Form S-1, filed July 27, 2015 (File No. 333-205561)).
4.4	Form of 6.125% Senior Note due 2023 (included in Exhibit 4.2).
10.1*	Amendment No. 1 to Exchange Agreement, dated as of August 4, 2015, among Summit Materials, Inc., Summit Holdings and the other parties identified on the signature pages thereto.
10.2*	Amendment No. 1 to Stockholders’ Agreement, dated as of July 16, 2015, by and among Summit Materials, Inc. and each of the other parties identified on the signature pages thereto.
10.3	Restatment Agreement, providing for the Amended and Restated Credit Agreement, dated as of July 17, 2015, among Summit Materials, LLC, Summit Materials Intermediate Holdings, LLC, the subsidiary guarantors party thereto, the lenders party thereto and Bank of America, N.A., as administrative agent, collateral agent, L/C issuer and swing line lender (incorporated by reference to Exhibit 10.1 filed with the Registrants’ Current Report on Form 8-K filed on July 20, 2015 (File Nos. 001-36873 and 333-187556)).
31.1*	Summit Materials, Inc.’s Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Summit Materials, Inc.’s Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.3*	Summit Materials, LLC’s Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.4*	Summit Materials, LLC’s Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**	Summit Materials, Inc.’s Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2**	Summit Materials, Inc.’s Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.3**	Summit Materials, LLC’s Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.4**	Summit Materials, LLC’s Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

44

95.1*	Mine Safety Disclosures.
99.1*	Summit Materials, LLC’s Unaudited Consolidated Financial Statements and Notes to Unaudited Consolidated Financial Statements.
101.INS*	XBRL Instance Document
101.SCH*	XBRL Taxonomy Extension Schema Document
101.CAL*	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF*	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB*	XBRL Taxonomy Extension Label Linkbase Document
101.PRE*	XBRL Taxonomy Extension Presentation Linkbase Document

* Filed herewith

** Furnished herewith

The agreements and other documents filed as exhibits to this report are not intended to provide factual information or other disclosure other than with respect to the terms of the agreements or other documents themselves, and you should not rely on them for that purpose. In particular, any representations and warranties made by us in these agreements or other documents were made solely within the specific context of the relevant agreement or document and may not describe the actual state of affairs as of the date they were made or at any other time.

45

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrants have duly caused this report to be signed on their behalf by the undersigned, thereunto duly authorized.

	SUMMIT MATERIALS, INC.
Date: November 3, 2015	By:	/s/ Thomas W. Hill
		Thomas W. Hill
		Chief Executive Officer (Principal Executive Officer)
Date: November 3, 2015	By:	/s/ Brian J. Harris
		Brian J. Harris
		Chief Financial Officer (Principal Financial and Accounting Officer)
	SUMMIT MATERIALS, LLC
Date: November 3, 2015	By:	/s/ Thomas W. Hill
		Thomas W. Hill
		Chief Executive Officer (Principal Executive Officer)
Date: November 3, 2015	By:	/s/ Brian J. Harris
		Brian J. Harris
		Chief Financial Officer (Principal Financial and Accounting Officer)

46

EX-10.1

Exhibit 10.1

AMENDMENT NO. 1 TO EXCHANGE AGREEMENT

This AMENDMENT NO. 1 TO EXCHANGE AGREEMENT, dated as of August 4, 2015 (this “Amendment”) is entered into by and among Summit Materials, Inc., a Delaware corporation (the “Corporation”), Summit Materials Holdings L.P., a Delaware limited partnership (“Summit Holdings”), and each of the other parties identified on the signature pages hereto (the “Financial Sponsor Holders”). This Amendment is an amendment to the Exchange Agreement, dated as of March 11, 2015 (the “Agreement”). Capitalized terms used herein but not defined herein shall have the meanings assigned to such terms in the Agreement.

RECITALS:

WHEREAS, the Exchange Agreement provides that it may be amended by the affirmative vote or written consent of each of (i) the Corporation, (ii) Summit Holdings, (iii) LP Unitholders holding a majority of the then outstanding LP Units (excluding LP Units held by the Corporation) and (iv) for so long as the Financial Sponsor Holders collectively own, in the aggregate, at least 5% of the outstanding LP Units, each of the Financial Sponsor Holders; and

WHEREAS, the Financial Sponsor Holders hold more than a majority of the outstanding LP Units (excluding LP Units held by the Corporation) as of the date hereof.

NOW THEREFORE, in consideration of the premises and agreements hereinafter set forth, the parties hereto hereby each consent in writing to and agree as follows:

Section 1. Amendment. The Agreement is hereby amended to insert the following as a new clause (h) to Section 2.1 of the Agreement:

“(h) Purchases by the Corporation and/or its subsidiaries of LP Units (including, without limitation, in connection with a “synthetic secondary” offering) shall for purposes of this Agreement constitute transfers to the Corporation in accordance with this Agreement.”

Section 2. Status. This Amendment amends the Agreement, but only to the extent expressly set forth herein. All other provisions of the Agreement remain in full force and effect.

Section 3. Governing Law. This Amendment shall be governed by, and construed in accordance with, the laws of the State of Delaware.

Section 4. Counterparts. This Amendment may be executed in one or more counterparts, each of which shall be deemed to be an original, but all of which shall be considered one and the same instrument.

Section 5. Facsimile Execution. Facsimile signatures on counterparts of this Amendment are hereby authorized and shall be acknowledged as if such facsimile signatures were an original execution, and this Amendment shall be deemed as executed when an executed facsimile hereof is transmitted by a party to any other party.

[Amendment No. 1 to Exchange Agreement]

[Remainder of Page Intentionally Left Blank]

IN WITNESS WHEREOF, the parties have caused this Amendment to be duly executed and delivered, all as of the date first set forth above.

Corporation:
SUMMIT MATERIALS, INC.
By:	/s/ Thomas W. Hill
Name:	Thomas W. Hill
Title:	Chief Executive Officer
Summit Holdings:
SUMMIT MATERIALS HOLDINGS L.P.
By:	SUMMIT MATERIALS, INC., its general partner
By:	/s/ Thomas W. Hill
Name:	Thomas W. Hill
Title:	Chief Executive Officer

[Amendment No. 1 to Exchange Agreement]

Financial Sponsor Holders:
BLACKSTONE PARTICIPATION PARTNERSHIP (DELAWARE) V-NQ L.P.
By:	BCP V-NQ GP L.L.C., its U.S. general partner
By:	/s/ Neil P. Simpkins
Name:	Neil P. Simpkins
Title:	Senior Managing Director
BLACKSTONE FAMILY INVESTMENT PARTNERSHIP (DELAWARE) V-NQ L.P.
By:	BCP V-NQ GP L.L.C., its U.S. general partner
By:	/s/ Neil P. Simpkins
Name:	Neil P. Simpkins
Title:	Senior Managing Director
BLACKSTONE CAPITAL PARTNERS (DELAWARE) V-NQ L.P.
By:	Blackstone Management Associates (Cayman) V-NQ L.P., its general partner
By:	BCP V-NQ GP L.L.C., its U.S. general partner
By:	/s/ Neil P. Simpkins
Name:	Neil P. Simpkins
Title:	Senior Managing Director

BLACKSTONE CAPITAL PARTNERS (DELAWARE) NQ V-AC L.P.
By:	Blackstone Management Associates (Cayman) V-NQ L.P., its general partner
By:	BCP V-NQ GP L.L.C., its U.S. general partner
By:	/s/ Neil P. Simpkins
Name:	Neil P. Simpkins
Title:	Senior Managing Director
SUMMIT BCP INTERMEDIATE HOLDINGS L.P.
By:	Summit BCP Intermediate Holdings GP, Ltd., its general partner
By:	/s/ Neil P. Simpkins
Name:	Neil P. Simpkins
Title:	Director

EX-10.2

Exhibit 10.2

AMENDMENT NO. 1 TO STOCKHOLDERS’ AGREEMENT

This AMENDMENT NO. 1 TO STOCKHOLDERS’ AGREEMENT, dated as of July 16, 2015 (this “Amendment”), is entered into by and between Summit Materials, Inc., a Delaware corporation (the “Company”) and each of the other parties identified on the signature pages hereto (the “Investor Parties”). This Amendment is an amendment to the Stockholders’ Agreement, dated as of March 11, 2015 (the “Agreement”) by and between the Company and the Investor Parties.

RECITALS:

WHEREAS, the Company and the Investor Parties desire to amend the Agreement with respect to the matters set forth herein.

NOW THEREFORE, in consideration of the premises and agreements hereinafter set forth, the parties hereto hereby agree as follows:

Section 1. Amendments. The Agreement is hereby amended to amend and restate the definition of “Outstanding Summit Interests” in its entirety to reach as follows:

“Outstanding Summit Interests” means the aggregate number of votes all outstanding shares of Common Stock would at such time be entitled to vote generally in the election of Directors. For purposes of calculating any proportion of Outstanding Summit Interests, the number of Outstanding Summit Interests held by any Person shall consist of the sum of (a) the number of shares of Class A Common Stock held by such Person and (b) the number of votes such Person is entitled to as a holder of Class B Common Stock, assuming in each case that the LP Units held by such Person have been exchanged for Class A Common Stock in accordance with the Exchange Agreement.

Section 2. Status. This Amendment amends the Agreement, but only to the extent expressly set forth herein. All other provisions of the Agreement remain in full force and effect. Unless otherwise defined herein, initially capitalized terms have the meaning given them in the Agreement.

Section 3. Governing Law. This Amendment shall be governed by and construed in accordance with the applicable terms and provisions of Section 5.7 of the Agreement, which terms and provisions are incorporated herein by reference.

Section 4. Counterparts. This Amendment may be executed in one or more counterparts, each of which shall be deemed to be an original, but all of which shall be considered one and the same instrument.

Section 5. Facsimile Execution. Facsimile signatures on counterparts of this Amendment are hereby authorized and shall be acknowledged as if such facsimile signatures were an original execution, and this Amendment shall be deemed as executed when an executed facsimile hereof is transmitted by a party to any other party.

[Remainder of Page Intentionally Left Blank]

IN WITNESS WHEREOF, each of the parties hereto has executed this Amendment as of the date first written above.

COMPANY
SUMMIT MATERIALS, INC.
By:	/s/ Thomas W. Hill
Name:	Thomas W. Hill
Title:	Chief Executive Officer

INVESTOR PARTIES:
BLACKSTONE PARTICIPATION PARTNERSHIP (DELAWARE) V-NQ L.P.
By:	BCP V-NQ GP L.L.C., its U.S. general partner
By:	/s/ Neil P. Simpkins
Name:	Neil P. Simpkins
Title:	Senior Managing Director
BLACKSTONE FAMILY INVESTMENT PARTNERSHIP (DELAWARE) V-NQ L.P.
By:	BCP V-NQ GP L.L.C., its U.S. general partner
By:	/s/ Neil P. Simpkins
Name:	Neil P. Simpkins
Title:	Senior Managing Director
BLACKSTONE CAPITAL PARTNERS (DELAWARE) V-NQ L.P.
By:	Blackstone Management Associates (Cayman) V-NQ L.P., its general partner
By:	BCP V-NQ GP L.L.C., its U.S. general partner
By:	/s/ Neil P. Simpkins
Name:	Neil P. Simpkins
Title:	Senior Managing Director

[Amendment No.1 to Stockholders’ Agreement]

BLACKSTONE CAPITAL PARTNERS (DELAWARE) NQ V-AC L.P.
By:	Blackstone Management Associates (Cayman) V-NQ L.P., its general partner
By:	BCP V-NQ GP L.L.C., its U.S. general partner
By:	/s/ Neil P. Simpkins
Name:	Neil P. Simpkins
Title:	Senior Managing Director
SUMMIT BCP INTERMEDIATE HOLDINGS L.P.
By:	Summit BCP Intermediate Holdings GP, Ltd., its general partner
By:	/s/ Neil P. Simpkins
Name:	Neil P. Simpkins
Title:	Director

[Amendment No.1 to Stockholders’ Agreement]

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Thomas W. Hill, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Summit Materials, Inc. (the “registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) [Reserved];

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 3, 2015

/s/ Thomas W. Hill

Thomas W. Hill

Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Brian J. Harris, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Summit Materials, Inc. (the “registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) [Reserved];

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 3, 2015

/s/ Brian J. Harris

Brian J. Harris

Chief Financial Officer

(Principal Financial Officer)

EX-31.3

Exhibit 31.3

CERTIFICATION

I, Thomas W. Hill, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Summit Materials, LLC (the “registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 3, 2015

/s/ Thomas W. Hill

Thomas W. Hill

Chief Executive Officer

(Principal Executive Officer)

EX-31.4

Exhibit 31.4

CERTIFICATION

I, Brian J. Harris, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Summit Materials, LLC (the “registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 3, 2015

/s/ Brian J. Harris

Brian J. Harris

Chief Financial Officer

(Principal Financial Officer)

EX-32.1

Exhibit 32.1

Certification

Pursuant to 18 U.S.C. Section 1350

as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Summit Materials, Inc. (the “Company”) on Form 10-Q for the quarterly period ended September 26, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Thomas W. Hill, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(i) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(ii) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 3, 2015

/s/ Thomas W. Hill

Thomas W. Hill

Chief Executive Officer

(Principal Executive Officer)

EX-32.2

Exhibit 32.2

Certification

Pursuant to 18 U.S.C. Section 1350

as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Summit Materials, Inc. (the “Company”) on Form 10-Q for the quarterly period ended September 26, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Brian J. Harris, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(i) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(ii) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 3, 2015

/s/ Brian J. Harris

Brian J. Harris

Chief Financial Officer

(Principal Financial Officer)

EX-32.3

Exhibit 32.3

Certification

Pursuant to 18 U.S.C. Section 1350

as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Summit Materials, LLC (the “Company”) on Form 10-Q for the quarterly period ended September 26, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Thomas W. Hill, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(i) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(ii) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 3, 2015

/s/ Thomas W. Hill

Thomas W. Hill

Chief Executive Officer

(Principal Executive Officer)

EX-32.4

Exhibit 32.4

Certification

Pursuant to 18 U.S.C. Section 1350

as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Summit Materials, LLC (the “Company”) on Form 10-Q for the quarterly period ended September 26, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Brian J. Harris, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(i) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(ii) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 3, 2015

/s/ Brian J. Harris

Brian J. Harris

Chief Financial Officer

(Principal Financial Officer)

EX-95.1

Exhibit 95.1

Mine Safety Disclosures

The operation of Summit Materials, Inc.’s and its subsidiaries’ (collectively, the “Company”) aggregates quarries and mines is subject to regulation by the federal Mine Safety and Health Administration (“MSHA”) under the Federal Mine Safety and Health Act of 1977 (the “Mine Act”). MSHA inspects the Company’s quarries and mines on a regular basis and issues various citations and orders when it believes a violation has occurred under the Mine Act. Whenever MSHA issues a citation or order, it also generally proposes a civil penalty, or fine, related to the alleged violation. Citations or orders may be contested and appealed, and as part of that process, are often reduced in severity and amount, and are sometimes dismissed.

Under the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (the “Dodd-Frank Act”), the Company is required to present information regarding certain mining safety and health citations which MSHA has issued with respect to its aggregates mining operations in its periodic reports filed with the Securities and Exchange Commission (the “SEC”). In evaluating this information, consideration should be given to factors such as: (i) the number of citations and orders will vary depending on the size of the quarry or mine and types of operations (underground or surface); (ii) the number of citations issued will vary from inspector to inspector and location to location; and (iii) citations and orders can be contested and appealed, and in that process, may be reduced in severity and amount, and are sometimes dismissed.

The Company presents the following items regarding certain mining safety and health matters for the three months ended September 26, 2015, as applicable:

• Total number of violations of mandatory health or safety standards that could significantly and substantially contribute to the cause and effect of a mine safety or health hazard under Section 104 of the Mine Act for which the Company has received a citation from MSHA (hereinafter, “Section 104 S&S Citations”). If MSHA determines that a violation of a mandatory health or safety standard is likely to result in a reasonably serious injury or illness under the unique circumstance contributed to by the violation, MSHA will classify the violation as a “significant and substantial” violation (commonly referred to as a “S&S” violation). MSHA inspectors will classify each citation or order written as a “S&S” violation or not.

• Total number of orders issued under Section 104(b) of the Mine Act (hereinafter, “Section 104(b) Orders”). These orders are issued for situations in which MSHA determines a previous violation covered by a Section 104(a) citation has not been totally abated within the prescribed time period, so a further order is needed to require the mine operator to immediately withdraw all persons (except authorized persons) from the affected area of a quarry or mine.

• Total number of citations and orders for unwarrantable failure of the mine operator to comply with mandatory health or safety standards under Section 104(d) of the Mine Act (hereinafter, “Section 104(d) Citations and Orders”). These violations are similar to those described above, but the standard is that the violation could significantly and substantially contribute to the cause and effect of a safety or health hazard, but the conditions do not cause imminent danger, and the MSHA inspector finds that the violation is caused by an unwarranted failure of the operator to comply with the health and safety standards.

• Total number of flagrant violations under Section 110(b)(2) of the Mine Act (hereinafter, “Section 110(b)(2) Violations”). These violations are penalty violations issued if MSHA determines that violations are “flagrant”, for which civil penalties may be assessed. A “flagrant” violation means a reckless or repeated failure to make reasonable efforts to eliminate a known violation of a mandatory health or safety standard that substantially and proximately caused, or reasonably could have been expected to cause, death or serious bodily injury.

• Total number of imminent danger orders issued under Section 107(a) of the Mine Act (hereinafter, “Section 107(a) Orders”). These orders are issued for situations in which MSHA determines an imminent danger exists in the quarry or mine and results in orders of immediate withdrawal of all persons (except certain authorized persons) from the area of the quarry or mine affected by its condition until the imminent danger and the underlying conditions causing the imminent danger no longer exist.

• Total dollar value of proposed assessments from MSHA under the Mine Act. These are the amounts of proposed assessments issued by MSHA with each citation or order for the time period covered by the reports. Penalties are assessed by MSHA according to a formula that considers a number of factors, including the mine operator’s history, size, negligence, gravity of the violation, good faith in trying to correct the violation promptly, and the effect of the penalty on the operator’s ability to continue in business.

• Total number of mining-related fatalities. Mines subject to the Mine Act are required to report all fatalities occurring at their facilities unless the fatality is determined to be “non-chargeable” to the mining industry. The final rules of the SEC require disclosure of mining-related fatalities at mines subject to the Mine Act. Only fatalities determined by MSHA not to be mining-related may be excluded.

• Receipt of written notice from MSHA of a pattern (or a potential to have such a pattern) of violations of mandatory health or safety standards that are of such nature as could have significantly and substantially contributed to the cause and effect of other mine health or safety hazards under Section 104(e) of the Mine Act. If MSHA determines that a mine has a “pattern” of these types of violations, or the potential to have such a pattern, MSHA is required to notify the mine operator of the existence of such a thing.

• Legal actions before the Federal Mine Safety and Health Review Commission (the “Commission”) pending as of the last day of period.

• Legal actions before the Commission initiated during period.

• Legal actions before the Commission resolved during period.

The Commission is an independent adjudicative agency that provides administrative trial and appellate review of legal disputes arising under the Mine Act. The cases may involve, among other questions, challenges by operators to citations, orders and penalties they have received from MSHA, or complaints of discrimination by miners under Section 105 of the Mine Act. There were no legal actions pending before the Commission for any of the Company’s quarries and mines, as of or during the quarter ended September 26, 2015.

Appendix 1 follows.

Appendix 1

Name of Company	Name or Operation	MSHA ID	State	Number of Inpsections			Total Number of Section 104 S&S Citation		Section 104(b) Citations and Orders		Section 104(d) Citations and Orders		Section 110(b)(2) Violations		Section 107(a) Orders		Total Dollar Value of Proposed MSHA Assessments		Received Written Notice Under Section 104(e)(yes/no)	Received Written Notice of Potential Violation under 104(e)(yes/no)	Number of Contested Citations		Number of Contested Penalties		Total Dollar Value of Penalties in Contest		Number of Complaints of Discharge or Discrimination
Alleyton Resources	4L Ranch	4104416	TX		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Alleyton Resources	Altair Plant	4104375	TX		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Alleyton Resources	Monahan	4104552	TX		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Alleyton Resources	Potter Plant	4104987	TX		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Alleyton Resources	Vox Plant	4105081	TX		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Austin Materials	Hays Quarry	4104514	TX		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Austin Materials	Ramming Pit	4104807	TX		1			—		—		—		—		—	$	207.00	No	No		—		—	$	0.00		—
Con-Agg of MO	Boon Quarries East	2300078	MO		1			—		—		—		—		—	$	100.00	No	No		—		—	$	0.00		—
Con-Agg of MO	Boon Quarries West	2300022	MO		1			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Con-Agg of MO	Boone Quarries-North Telsmith Plant	2301894	MO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Con-Agg of MO	Con-Agg LLC dba Boone Quarries	2302153	MO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Con-Agg of MO	Huntsville Quarry	2302004	MO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Con-Agg of MO	Plant # 65	2301922	MO		1			—		—		—		—		—	$	100.00	No	No		—		—	$	0.00		—
Con-Agg of MO	plant # 80	2302071	MO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Con-Agg of MO	Plant # 81	2302296	MO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Con-Agg of MO	Plant #83	2302338	MO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Concrete Supply	Oakland Sand River Plant	1401742	KS		2			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Concrete Supply	Silver Lake Plant	1401702	KS		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Continental Cement Company	Davenport Plant	1300125	IA		2			6		—		—		—		—	$	53.13	No	No		5		5	$	4,168.00		—
Continental Cement Company	Hannibal Plant	2300217	MO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Continental Cement Company	Hannibal Underground	2302434	MO		3			3		—		2		—		—	$	422.38	No	No		1		1	$	6,996.00		—
Continental Cement Company	Owensville Plant	2301038	MO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Cornejo & Sons	Durbin Quarry	1401719	KS		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Cornejo & Sons	Grove	1401539	KS		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Cornejo & Sons	Kingsbury	1400624	KS		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Cornejo & Sons	Oxford Sand and Gravel	1400522	KS		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Cornejo & Sons	Wichita Sand and Gravel	1400543	KS		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hamm, Inc	85.9	1401759	KS		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hamm, Inc	Herington Airport	1401698	KS		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hamm, Inc	Plant # 80002	1401583	KS		1			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hamm, Inc	Plant # 80003	1401474	KS		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hamm, Inc	Plant # 80010	1401687	KS		1			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hamm, Inc	Plant # 80011	1401470	KS		1			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hamm, Inc	Plant # 80013	1401609	KS		2			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hamm, Inc	Plant #80006	1401471	KS		1			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hamm, Inc	Plant #80012	1401472	KS		2			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hamm, Inc	Plant #81038	1401709	KS		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Allen Co. Stone	1500063	KY		1			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Barren Co Stone	1506863	KY		2			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Bassett Stone Company	1500004	KY		1			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Bourbon Limestone Company	1518415	KY		3			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Casey Stone Company	1500012	KY		3			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Cave Run Stone	1507194	KY		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Ewing Stone	4400234	VA		1			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Glass Sand and Gravel	1504261	KY		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Hart County Stone Company	1500035	KY		2			—		—		—		—		—	$	100.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Jellico Stone Company	4000057	TN		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Lake Cumberland Stone	1500099	KY		1			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Lynches River Quarry	3800715	SC		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Monroe Co. Stone	1500101	KY		2			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Natural Bridge Stone	1500075	KY		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Pulaski Stone Company	1519092	KY		3			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Somerset Stone Company	1500094	KY		4	*		—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Tipton Ridge Quarry	1500019	KY		1			—		—		—		—		—	$	100.00	No	No		—		—	$	0.00		—
Hinkle Contracting Company	Black Creek Sand Mine	3800722	SC		2			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Black Canyon 2100	1002146	ID		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Crusher 2	0504645	CO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Crusher 3	0504593	CO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Crusher1	0504296	CO		2			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Elam Construction Inc	0504593	CO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Highland Pit	4200941	UT		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	KC-Portable 2 (WY)	4801625	WY		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	KC-Portable 3 (WY)	4801626	WY		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Mona Pit	4202212	UT		2			—		—		—		—		—	$	100.00	No	No		—		—	$	0.00		—
Kilgore Companies	Parleys Stone	4202102	UT		2			—		—		—		—		—	$	100.00	No	No		—		—	$	0.00		—
Kilgore Companies	Portable 1	4202528	UT		2			2		—		—		—		—	$	138.40	No	No		—		—	$	0.00		—
Kilgore Companies	Powerscreen 2100-2	1002147	ID		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Rental Plant 1	0504616	CO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Roadrunner Screen	1001916	ID		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Stockton Pit	4202480	UT		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Valley Pit	4200400	UT		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Washplant 1	0504873	CO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Washplant 2`	0504746	CO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Washplant 3	0504565	CO		2			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Washplant 4	0503809	CO		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	West Valley	4201980	UT		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Kolberg Portable Belt & Grizzly	4202384	ID		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	PORTABLE CRUSHER A UNIT	4201736	UT		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Portable Crusher K	4202523	UT		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	PORTABLE CRUSHER UNIT B	4201963	UT		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Portable Crusher G	4202360	UT		2			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Kilgore Companies	Lewis & Lewis, Inc Pit #2	4801482	WY		5			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
RK Hall Construction	Kirby Crusher #15	0301958	AR		—			—		—		—		—		—	$	0.00	No	No		1		1	$	100.00		—
RK Hall Construction	Sawyer Plant	3401950	OK		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Troy Vines	Vines Portable Plant	4103607	TX		1			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—
Troy Vines	Vines Sand and Gravel	4103348	TX		—			—		—		—		—		—	$	0.00	No	No		—		—	$	0.00		—

EX-99.1

Exhibit 99.1

SUMMIT MATERIALS, LLC AND SUBSIDIARIES

Consolidated Balance Sheets

(In thousands)

	September 26, 2015 (unaudited)			December 27, 2014 (audited)
Assets
Current assets:
Cash and cash equivalents	$	5,482		$	13,215
Accounts receivable, net		205,939			141,302
Costs and estimated earnings in excess of billings		34,175			10,174
Inventories		138,036			111,553
Other current assets		21,762			17,172
Total current assets		405,394			293,416
Property, plant and equipment, less accumulated depreciation, depletion and amortization (September 26, 2015 - $343,087 and December 27, 2014 - $279,375)		1,276,227			950,601
Goodwill		567,836			419,270
Intangible assets, less accumulated amortization (September 26, 2015 - $4,851 and December 27, 2014 - $3,073)		15,481			17,647
Other assets		51,798			48,843
Total assets	$	2,316,736		$	1,729,777
Liabilities, Redeemable Noncontrolling Interest and Member’s Interest
Current liabilities:
Current portion of debt	$	68,125		$	5,275
Current portion of acquisition-related liabilities		17,691			18,402
Accounts payable		113,226			78,854
Accrued expenses		90,880			101,496
Billings in excess of costs and estimated earnings		11,005			8,958
Total current liabilities		300,927			212,985
Long-term debt		1,148,068			1,059,642
Acquisition-related liabilities		33,320			42,736
Other noncurrent liabilities		114,575			93,691
Total liabilities		1,596,890			1,409,054
Commitments and contingencies (see note 11)
Redeemable noncontrolling interest		—			33,740
Member’s equity		1,039,763			518,647
Accumulated deficit		(293,101	)		(217,416	)
Accumulated other comprehensive loss		(28,087	)		(15,546	)
Member’s interest		718,575			285,685
Noncontrolling interest		1,271			1,298
Total member’s interest		719,846			286,983
Total liabilities, redeemable noncontrolling interest and member’s interest	$	2,316,736		$	1,729,777

See notes to unaudited consolidated financial statements.

1

SUMMIT MATERIALS, LLC AND SUBSIDIARIES

Unaudited Consolidated Statements of Operations

(In thousands)

	Three months ended						Nine months ended
	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
Revenue:
Product	$	338,020		$	258,860		$	748,210		$	580,351
Service		88,266			89,276			182,224			196,214
Net revenue		426,286			348,136			930,434			776,565
Delivery and subcontract revenue		45,619			46,623			100,401			93,580
Total revenue		471,905			394,759			1,030,835			870,145
Cost of revenue (excluding items shown separately below):
Product		207,500			176,967			490,923			411,581
Service		59,280			61,907			128,514			140,773
Net cost of revenue		266,780			238,874			619,437			552,354
Delivery and subcontract cost		45,619			46,623			100,401			93,580
Total cost of revenue		312,399			285,497			719,838			645,934
General and administrative expenses		42,539			35,517			149,484			105,872
Depreciation, depletion, amortization and accretion		33,306			23,255			86,818			63,950
Transaction costs		304			2,741			8,044			7,737
Operating income		83,357			47,749			66,651			46,652
Other income, net		(1,171	)		(1,408	)		(678	)		(2,299	)
Loss on debt financings		32,641			—			64,313			—
Interest expense		20,436			22,085			61,649			62,555
Income (loss) from continuing operations before taxes		31,451			27,072			(58,633	)		(13,604	)
Income tax benefit		(2,655	)		(1,038	)		(12,468	)		(2,498	)
Income (loss) from continuing operations		34,106			28,110			(46,165	)		(11,106	)
Income from discontinued operations		(57	)		(7	)		(815	)		(356	)
Net income (loss)		34,163			28,117			(45,350	)		(10,750	)
Net income (loss) attributable to noncontrolling interest		52			1,243			(1,917	)		674
Net income (loss) attributable to member of Summit Materials, LLC	$	34,111		$	26,874		$	(43,433	)	$	(11,424	)

See notes to unaudited consolidated financial statements.

2

SUMMIT MATERIALS, LLC AND SUBSIDIARIES

Unaudited Consolidated Statements of Comprehensive Income (Loss)

(In thousands)

	Three months ended						Nine months ended
	September 26,			September 27,			September 26,			September 27,
	2015			2014			2015			2014
Net income (loss)	$	34,163		$	28,117		$	(45,350	)	$	(10,750	)
Other comprehensive (loss) income:
Postretirement curtailment adjustment		—			—			—			(1,346	)
Postretirement liability adjustment		—			—			—			2,164
Foreign currency translation adjustment		(6,296	)		(1,764	)		(11,531	)		(1,764	)
Loss on cash flow hedges		(1,010	)		—			(1,010	)		—
Other comprehensive loss		(7,306	)		(1,764	)		(12,541	)		(946	)
Comprehensive income (loss)		26,857			26,353			(57,891	)		(11,696	)
Less comprehensive income (loss) attributable to the noncontrolling interest		52			1,243			(1,917	)		919
Comprehensive income (loss) attributable to member of Summit Materials, LLC	$	26,805		$	25,110		$	(55,974	)	$	(12,615	)

See notes to unaudited consolidated financial statements.

3

SUMMIT MATERIALS, LLC AND SUBSIDIARIES

Unaudited Consolidated Statements of Cash Flows

(In thousands)

	Nine months ended
	September 26,			September 27,
	2015			2014
Cash flow from operating activities:
Net loss	$	(45,350	)	$	(10,750	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, depletion, amortization and accretion		90,207			68,467
Share-based compensation expense		18,589			1,746
Deferred income tax benefit		—			(525	)
Net gain on asset disposals		(4,990	)		(219	)
Net gain on debt financings		(4,570	)		—
Other		136			(463	)
(Increase) decrease in operating assets, net of acquisitions:
Accounts receivable, net		(56,287	)		(54,463	)
Inventories		(3,830	)		(3,843	)
Costs and estimated earnings in excess of billings		(23,402	)		(15,009	)
Other current assets		(4,401	)		(3,910	)
Other assets		(524	)		(675	)
Increase (decrease) in operating liabilities, net of acquisitions:
Accounts payable		29,383			9,433
Accrued expenses		(12,272	)		2,578
Billings in excess of costs and estimated earnings		(763	)		270
Other liabilities		(853	)		(3,473	)
Net cash used in operating activities		(18,927	)		(10,836	)
Cash flow from investing activities:
Acquisitions, net of cash acquired		(505,466	)		(351,941	)
Purchases of property, plant and equipment		(69,672	)		(64,244	)
Proceeds from the sale of property, plant and equipment		8,883			9,575
Other		610			757
Net cash used for investing activities		(565,645	)		(405,853	)
Cash flow from financing activities:
Capital contributions by member		490,916			24,350
Capital issuance costs		(12,539	)		—
Proceeds from debt issuances		1,415,750			657,217
Debt issuance costs		(10,911	)		(8,834	)
Payments on debt		(1,251,407	)		(258,337	)
Payments on acquisition-related liabilities		(15,018	)		(5,807	)
Distributions from partnership		(39,952	)		—
Other		—			(88	)
Net cash provided by financing activities		576,839			408,501
Net decrease in cash		(7,733	)		(8,188	)
Cash – beginning of period		13,215			14,917
Cash – end of period	$	5,482		$	6,729

See notes to unaudited consolidated financial statements.

4

SUMMIT MATERIALS, LLC AND SUBSIDIARIES

Unaudited Consolidated Statements of Changes in Redeemable Noncontrolling Interest and Member’s Interest

(In thousands)

	Total Member’s Interest
	Member’s equity			Accumulated deficit			Accumulated other comprehensive loss			Noncontrolling interest			Total member’s interest			Redeemable noncontrolling interest
Balance — December 27, 2014	$	518,647		$	(217,416	)	$	(15,546	)	$	1,298		$	286,983		$	33,740
Contributed capital		542,479			—			—			—			542,479
Accretion/ redemption value adjustment		—			(32,252	)		—			—			(32,252	)		(31,850	)
Net loss		—			(43,433	)		—			(27	)		(43,460	)		(1,890	)
Other comprehensive loss		—			—			(12,541	)		—			(12,541	)		—
Distributions		(39,952	)		—			—			—			(39,952	)		—
Share-based compensation		18,589			—			—			—			18,589			—
Balance — September 26, 2015	$	1,039,763		$	(293,101	)	$	(28,087	)	$	1,271		$	719,846		$	—
Balance — December 28, 2013		486,896			(198,511	)		(6,045	)		1,211			283,551			24,767
Contributed capital		24,350			—			—			—			24,350			—
Accretion/ redemption value adjustment		—			(6,211	)		—			—			(6,211	)		6,211
Net loss		—			(11,424	)		—			77			(11,347	)		597
Other comprehensive income		—			—			(1,191	)		—			(1,191	)		245
Share-based compensation		3,732			(1,982	)		—			—			1,750			—
Repurchase of member’s interest		(88	)		—			—			—			(88	)		—
Balance —September 27, 2014	$	514,890		$	(218,128	)	$	(7,236	)	$	1,288		$	290,814		$	31,820

See notes to unaudited consolidated financial statements.

5

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(Tables in thousands)

1. SUMMARY OF ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES

Summit Materials, LLC (“Summit LLC” and, together with its subsidiaries, the “Company”) is a vertically integrated, construction materials company. The Company is engaged in the production and sale of aggregates, cement, ready-mixed concrete, asphalt paving mix and concrete products and owns and operates quarries, sand and gravel pits, two cement plants, cement distribution terminals, ready-mixed concrete plants, asphalt plants and landfill sites. It is also engaged in paving and related services. The Company is organized by geographic region and has three operating segments, which are also its reporting segments: the West; Central; and East regions.

Substantially all of the Company’s products and services are produced, consumed and performed outdoors, primarily in the spring, summer and fall. Seasonal changes and other weather-related conditions can affect the production and sales volumes of its products and delivery of services. Therefore, the financial results for any interim period are typically not indicative of the results expected for the full year. Furthermore, the Company’s sales and earnings are sensitive to national, regional and local economic conditions and to cyclical changes in construction spending, among other factors.

Summit LLC is a wholly owned indirect subsidiary of Summit Materials Holdings L.P. (“Summit Holdings”), whose primary owners are Summit Materials, Inc. (“Summit Inc.”) and certain investment funds affiliated with Blackstone Capital Partners V L.P. and Silverhawk Summit, L.P. (collectively, the “Sponsors”). Summit Inc. was formed as a Delaware corporation on September 23, 2014 to be a holding company. Its sole material asset is a controlling equity interest in Summit Holdings. Pursuant to a reorganization into a holding company structure (the “Reorganization”) in connection with Summit Inc.’s March 2015 initial public offering, Summit Inc. became a holding corporation operating and controlling all of the business and affairs of Summit Holdings and its subsidiaries, including Summit LLC.

Initial Public Offering—Summit Inc. commenced operations on March 11, 2015 upon the pricing of the initial public offering of its Class A common stock (“IPO”). Summit Inc. raised $433.0 million, net of underwriting discounts, through the issuance of 25,555,555 shares of Class A common stock at a public offering price of $18.00 per share. Summit Inc. used the offering proceeds to purchase a number of newly-issued Class A Units (“LP Units”) from Summit Holdings equal to the number of shares of Class A common stock issued to the public. Summit Inc. caused Summit Holdings to use these proceeds: (i) to redeem $288.2 million in aggregate principal amount of outstanding 10 ¹/₂% Senior Notes due January 31, 2020 (“2020 Notes”); (ii) to purchase 71,428,571 Class B Units of Continental Cement Company, L.L.C. (“Continental Cement”); (iii) to pay a one-time termination fee of $13.8 million primarily to affiliates of the Sponsors in connection with the termination of a transaction and management fee agreement; and (iv) for general corporate purposes. The $288.2 million redemption of 2020 Notes was completed in the second quarter of 2015 at a redemption price equal to par plus an applicable premium of $38.2 million plus $5.2 million of accrued and unpaid interest.

Follow-On Offering—On August 11, 2015, Summit Inc. raised $555.8 million, net of underwriting discounts, through the issuance of 22,425,000 shares of Class A common stock at a public offering price of $25.75 per share. Summit Inc. used these proceeds to purchase 3,750,000 newly-issued LP Units from Summit Holdings and 18,675,000 LP Units from certain of our pre-IPO owners, at a purchase price per LP Unit equal to the public offering price per share of Class A common stock, less underwriting discounts and commissions. Summit Holdings used the proceeds from the 3,750,000 newly-issued LP Units to pay the deferred purchase price of $80.0 million related to the July 17, 2015 acquisition of a cement plant and a quarry in Davenport, Iowa, and seven cement terminals along the Mississippi River (the “Davenport Assets”) and for general corporate purposes.

Basis of Presentation—These unaudited consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures typically included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. These unaudited consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto as of and for the year ended December 27, 2014. The Company continues to follow the accounting policies set forth in those consolidated financial statements.

Management believes that these consolidated interim financial statements include all adjustments, normal and recurring in nature, that are necessary to present fairly the financial position of the Company as of September 26, 2015, the results of operations for the three and nine months ended September 26, 2015 and September 27, 2014 and cash flows for the nine months ended September 26, 2015 and September 27, 2014. All significant intercompany balances and transactions have been eliminated.

6

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

The Company’s fiscal year is based on a 52-53 week year with each quarter composed of 13 weeks ending on a Saturday. The 53-week year occurs approximately once every seven years and will occur in 2015. The additional week in the 53-week year will be included in the fourth quarter.

The consolidated financial statements of the Company include the accounts of Summit LLC and its subsidiaries, including noncontrolling interests. Noncontrolling interests in consolidated subsidiaries represent a 20% ownership in Ohio Valley Asphalt, LLC and, prior to the IPO and concurrent purchase of the noncontrolling interests of Continental Cement, a 30% redeemable ownership in Continental Cement.

Use of Estimates—Preparation of these consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities and reported amounts of revenue and expenses. Such estimates include the valuation of accounts receivable, inventories, goodwill, intangibles and other long-lived assets, pension and other postretirement obligations and asset retirement obligations. Estimates also include revenue earned on contracts and costs to complete contracts. Most of the Company’s paving and related services are performed under fixed unit-price contracts with state and local governmental entities. Management regularly evaluates its estimates and assumptions based on historical experience and other factors, including the current economic environment. Management adjusts such estimates and assumptions when circumstances dictate. As future events and their effects cannot be determined with precision, actual results can differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, are reflected in the Company’s consolidated financial statements when the change in estimate occurs.

Business and Credit Concentrations—The Company’s operations are conducted primarily across 18 U.S. states and in British Columbia, Canada, with the most significant revenue generated in Texas, Kansas, Kentucky, Utah and Missouri. The Company’s accounts receivable consist primarily of amounts due from customers within these areas. Therefore, collection of these accounts is dependent on the economic conditions in the aforementioned states, as well as specific situations affecting individual customers. Credit granted within the Company’s trade areas has been granted to many customers, and management does not believe that a significant concentration of credit exists with respect to any individual customer or group of customers. No single customer accounted for more than 10% of total revenue in the three and nine months ended September 26, 2015 and September 27, 2014.

Fair Value Measurements—Certain acquisitions made by the Company require the payment of contingent amounts of purchase consideration. These payments are contingent on specified operating results being achieved in periods subsequent to the acquisition and will only be made if earn-out thresholds are achieved. Contingent consideration obligations are measured at fair value each reporting period. Any adjustments to fair value are recognized in earnings in the period identified. In the third quarter of 2015, the Company entered into interest rate derivatives on $200.0 million of its term loan borrowings to add stability to interest expense and to manage its exposure to interest rate movements. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive loss and will be subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The fair value of contingent consideration and derivatives as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015		December 27, 2014
Current portion of derivatives and acquisition-related liabilities:
Contingent consideration	$	4,559	$	2,375
Cash flow hedge		114
Derivatives and acquisition- related liabilities:
Contingent consideration	$	2,711	$	5,379
Cash flow hedge		897

The fair value of contingent consideration was based on unobservable, or Level 3, inputs, including projected probability-weighted cash payments and an 11.0% discount rate, which reflects a market discount rate. Changes in fair value may occur as a result of a change in actual or projected cash payments, the probability weightings applied by the Company to projected payments or a change in the discount rate. Significant increases or decreases in any of these inputs in isolation could result in a lower, or higher, fair value measurement. The fair value of the derivatives are based on observable, or Level 2, inputs such as interest rates, bond yields and prices in inactive markets. There were no material valuation adjustments in the three or nine months ended September 26, 2015 or September 27, 2014.

7

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

Financial Instruments—The Company’s financial instruments include debt and certain acquisition-related liabilities (deferred consideration and noncompete obligations). The carrying value and fair value of these financial instruments as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015				December 27, 2014
	Fair Value		Carrying Value		Fair Value		Carrying Value
Level 2
Long-term debt(1)	$	1,155,557	$	1,156,193	$	1,101,873	$	1,064,917
Level 3
Current portion of deferred consideration and noncompete obligations(2)		13,132		13,132		16,027		16,027
Long term portion of deferred consideration and noncompete obligations(3)		30,609		30,609		37,357		37,357

(1) $8.1 million and $5.3 million included in current portion of debt as of September 26, 2015 and December 27, 2014, respectively. Excludes $60.0 million outstanding on the revolving credit facility as of September 26, 2015.

(2) Included in current portion of acquisition-related liabilities on the balance sheet.

(3) Included in acquisition-related liabilities on the balance sheet.

The fair value of debt was determined based on observable, or Level 2 inputs, such as interest rates, bond yields and quoted prices in inactive markets. The fair values of the deferred consideration and noncompete obligations were determined based on unobservable, or Level 3, inputs, including the cash payment terms in the purchase agreements and a discount rate reflecting the Company’s credit risk.

Redeemable Noncontrolling Interest — On March 17, 2015, upon the consummation of the IPO and the transactions contemplated by a contribution and purchase agreement entered into with the holders of all of the outstanding Class B Units of Continental Cement, Continental Cement became a wholly-owned indirect subsidiary of Summit LLC. The noncontrolling interests of Continental Cement were acquired for aggregate consideration of $64.1 million, consisting of $35.0 million of cash, 1,029,183 shares of Summit Inc.’s Class A common stock and $15.0 million aggregate principal amount of non-interest bearing notes payable in six annual installments of $2.5 million, beginning on March 17, 2016. The notes payable is a liability of Summit Holdings and, is therefore not included in the liabilities of Summit LLC.

New Accounting Standards — In April 2015, the FASB issued Accounting Standards Update (“ASU”) 2015-03, Simplifying the Presentation of Debt Issuance Costs, which changes the presentation of debt issuance costs in financial statements. Under the ASU, an entity will present such costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the costs will continue to be reported as interest expense. The ASU is effective for public entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The guidance will be applied retrospectively to all prior periods (i.e., the balance sheet for each period will be adjusted). Had the Company adopted this guidance as of the current period, both Other Assets (noncurrent) and Long-term Debt as of September 26, 2015 and December 27, 2014, would have decreased by $8.8 million and $16.8 million, respectively.

In April 2015, the FASB issued a new accounting standard, ASU 2015-04, Practical Expedient for the Measurement Date of an Employer’s Defined Benefit Obligation and Plan Assets, which gives an employer whose fiscal year-end does not coincide with a calendar month-end (e.g., an entity that has a 52- or 53-week fiscal year) the ability, as a practical expedient, to measure defined benefit retirement obligations and related plan assets as of the month-end that is closest to its fiscal year-end. The ASU is effective for public business entities for financial statements issued for fiscal years beginning after December 31, 2015, and interim periods within those fiscal years. Early application is permitted, and the ASU should be applied prospectively. The Company does not expect the adoption of this ASU to have a material effect on its financial position or results of operations.

In May 2014, the FASB issued a new accounting standard to improve and converge the financial reporting requirements for revenue from contracts with customers. ASU No. 2014-09, Revenue from Contracts with Customers, prescribes a five-step model for revenue recognition that will replace most existing revenue recognition guidance in U.S. GAAP. The ASU will supersede nearly all existing revenue recognition guidance under U.S. GAAP and provides that an entity recognize revenue when it transfers 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 update also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and

8

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

changes in judgments, and assets recognized from costs incurred to obtain or fulfill a contract. ASU No. 2014-09 allows for either full retrospective or modified retrospective adoption. In July 2015, the FASB postponed the effective date of the new revenue standard by one year to the first quarter of 2018. Early adoption is permitted, but no earlier than 2017. Management is currently assessing the effect that the adoption of this standard will have on the consolidated financial statements.

Reclassifications — Certain amounts in the prior year have been reclassified to conform to the current period’s presentation.

2. REORGANIZATION

Prior to the IPO and Reorganization, the capital structure of Summit Holdings consisted of six different classes of limited partnership interests (Class A-1, Class A-2, Class B-1, Class C, Class D-1 and Class D-2), each of which was subject to unique distribution rights. There were no outstanding Class A-2 interests. In connection with the IPO and the Reorganization, the limited partnership agreement of Summit Holdings was amended and restated to, among other things, modify its capital structure by creating a single new class of units (the “LP Units”), referred to as the “Reclassification.” Immediately following the Reclassification, 69,007,297 LP Units were outstanding. In addition, in substitution for part of the economic benefit of the Class C and Class D interests that was not reflected in the conversion of such interests to LP Units, warrants were issued to holders of Class C interests to purchase an aggregate of 160,333 shares of Summit Inc.’s Class A common stock, and options were issued to holders of Class D interests to purchase an aggregate of 4,358,842 shares of Summit Inc.’s Class A common stock (“leverage restoration options”). The exercise price of the warrants and leverage restoration options is the IPO price of $18.00 per share. In conjunction with the Reclassification of the equity-based awards, the Company recognized a $14.5 million modification charge in general and administrative costs.

The leverage restoration options were granted under the Summit Materials, Inc. 2015 Omnibus Incentive Plan (the “Omnibus Incentive Plan”). The leverage restoration options that correlate to time-vesting interests vest over four years, beginning on the Reclassification date and the leverage restoration options that correlate to performance-vesting interests vest only when both the relevant return multiple is achieved and a four year time-vesting condition is satisfied. The time-based vesting condition for both the time-vesting and performance-vesting interests will be satisfied with respect to 25% of the performance-vesting options on each of the first four anniversaries of the Reclassification date, subject to the employee’s continued employment through the applicable vesting date.

The Company also granted 240,000 options to purchase shares of Summit Inc.’s Class A common stock under the Omnibus Incentive Plan to certain employees some of whom had not previously been granted equity-based interests. These stock options have an exercise price of $18.00 per share, the IPO price, and are subject to a time-based vesting condition that will be satisfied with respect to 25% of the award on each of the first four anniversaries of the grant date, subject to the employee’s continued employment through the applicable vesting date.

3. ACQUISITIONS

On July 17, 2015, the Company acquired the Davenport Assets for a purchase price of $450.0 million in cash and a cement distribution terminal in Bettendorf, Iowa. The operating results of the acquired business have been included in the Central region’s results of operations since the date of the acquisition. Assets acquired and liabilities assumed are measured at their acquisition-date fair value. Goodwill recognized in connection with the acquisition is primarily attributable to the expected profitability, assembled workforces and operational infrastructure of the acquired business and the synergies expected to result after its integration. The Davenport Assets were immediately integrated into the Company’s existing cement operations such that it is not practicable to report revenue and net income separately for the Davenport Assets.

Pro Forma Financial Information (unaudited) — The following unaudited supplemental pro forma information presents the financial results as if the Davenport Assets had been acquired on the first day of the 2014 fiscal year. This supplemental pro forma information has been prepared for comparative purposes and does not purport to be indicative of what would have occurred had the acquisition been made on the first day of the preceding fiscal year, nor is it indicative of any future results. The pro forma adjustments include a reduction of transaction costs of $6.5 million and additional depreciation, depletion, amortization and accretion of $7.5 million.

	Three months ended		Nine months ended
	September 26, 2015		September 26, 2015
Revenue	$	477,706	$	1,069,305
Net income		67,229		24,506

9

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

The purchase price allocation for the Davenport Assets has not been finalized due to the recent timing of the acquisition. The following table summarizes aggregated information regarding the estimated fair values of the assets acquired and liabilities assumed in conjunction with the acquisition:

	September 26, 2015
Inventories	$	21,538
Property, plant and equipment		272,815
Other assets		6,537
Financial liabilities		(1,509	)
Other long-term liabilities		(95	)
Net assets acquired		299,286
Goodwill		150,710
Total consideration		449,996
Transfer of assets		(2,182	)
Working capital true-up		896
Net cash paid for acquisitions	$	448,710

4. GOODWILL

Changes in the carrying amount of goodwill, by reportable segment, from December 27, 2014 to September 26, 2015 are summarized as follows:

	West			Central		East		Total
Balance, December 27, 2014	$	297,085		$	96,025	$	26,160	$	419,270
Acquisitions (1)		4,579			150,929		—		155,508
Foreign currency translation adjustments		(6,942	)		—		—		(6,942	)
Balance, September 26, 2015	$	294,722		$	246,954	$	26,160	$	567,836

(1) Includes certain working capital adjustments related to 2014 acquisitions

5. ACCOUNTS RECEIVABLE, NET

Accounts receivable, net consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,			December 27,
	2015			2014
Trade accounts receivable	$	194,235		$	131,060
Retention receivables		13,396			12,053
Receivables from related parties		705			333
Accounts receivable		208,336			143,446
Less: Allowance for doubtful accounts		(2,397	)		(2,144	)
Accounts receivable, net	$	205,939		$	141,302

Retention receivables are amounts earned by the Company but held by customers until paving and related service contracts and projects are near completion or fully completed. Amounts are expected to be billed and collected within one year.

10

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

6. INVENTORIES

Inventories consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,		December 27,
	2015		2014
Aggregate stockpiles	$	90,776	$	88,211
Finished goods		11,284		8,826
Work in process		6,511		1,801
Raw materials		29,465		12,715
Total	$	138,036	$	111,553

7. ACCRUED EXPENSES

Accrued expenses consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,		December 27,
	2015		2014
Interest	$	12,973	$	32,475
Payroll and benefits		22,095		20,326
Capital lease obligations		16,065		17,530
Insurance		13,710		11,402
Non-income taxes		10,221		5,520
Professional fees		1,305		3,299
Other (1)		14,511		10,944
Total	$	90,880	$	101,496

(1) Consists primarily of subcontractor and working capital settlement accruals.

11

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

8. DEBT

Debt consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,		December 27,
	2015		2014
Revolving credit facility	$	60,000	$	—
Long-term debt:
10 1/2% Senior Notes, due 2020:
$153.8 million senior notes, including a $5.5 million net premium at September 26, 2015 and $625.0 million senior notes, including a $26.5 million net premium at December 27, 2014		159,365		651,548
6 1/8% Senior Notes, due 2023:
$350.0 million senior notes, issued at par at September 26, 2015		350,000
Term Loan, due 2022:
$650.0 million term loan, net of $3.1 million discount at September 26, 2015 and $415.7 million term loan, net of $2.3 million discount at December 27, 2014		646,828		413,369
Total		1,156,193		1,064,917
Current portion of long-term debt		8,125		5,275
Long-term debt	$	1,148,068	$	1,059,642

The contractual payments of long-term debt, including current maturities, for the five years subsequent to September 26, 2015, are as follows:

2015 (three months)	$	3,250
2016		6,500
2017		6,500
2018		4,875
2019		6,500
2020		161,925
Thereafter		964,250
Total		1,153,800
Plus: Original issue net premium		2,393
Total debt	$	1,156,193

Senior Notes—The 2020 Notes were issued under an indenture dated January 30, 2012 (as amended and supplemented, the “2012 Indenture”) by Summit LLC and Summit Materials Finance Corp. (collectively, the “Issuers”). The Indenture contains covenants limiting, among other things, Summit LLC and its restricted subsidiaries’ ability to incur additional indebtedness or issue certain preferred shares, pay dividends, redeem stock or make other distributions, make certain investments, sell or transfer certain assets, create liens, consolidate, merge, sell or otherwise dispose of all or substantially all of the Company’s assets, enter into certain transactions with affiliates, and designate subsidiaries as unrestricted subsidiaries. The 2012 Indenture also contains customary events of default. Interest on the 2020 Notes is payable semi-annually in arrears. On September 8, 2014 and January 17, 2014, the Issuers issued an additional $115.0 million and $260.0 million, respectively, aggregate principal amount of 2020 Notes (the “Additional Notes”), receiving proceeds of $409.3 million, before payment of fees and expenses and including an aggregate $34.3 million premium. The proceeds from the sale of the Additional Notes were used for the purchases of acquisitions, to make payments on the revolving credit facility and for general corporate purposes. The Additional Notes are treated as a single series with the $250.0 million of 2020 Notes issued in January 2012 (the “Existing Notes”) and have substantially the same terms as those of the Existing Notes. The Additional Notes and the Existing Notes are treated as one class under the 2012 Indenture.

12

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

The Issuers issued $350.0 million in aggregate principal amount of 6.125% senior notes due July 15, 2023 (the “2023 Notes”) under an indenture dated July 28, 2015 (as amended and supplemented, the “2015 Indenture”). The net proceeds from the 2023 Notes, with proceeds from the refinancing of the term loan described below, were used to pay the $370.0 million initial purchase price for the Davenport Assets and to redeem $183.0 million aggregate principal amount of the 2020 Notes and pay related fees and expenses. The 2015 Indenture contains covenants and events of default generally consistent with the 2012 Indenture. The 2023 Notes were issued at 100% of their par value. Interest on the 2023 Notes is payable semi-annually in arrears on January 15 and July 15 of each year commencing on January 15, 2016. As of September 26, 2015 and December 27, 2014, the Company was in compliance with all covenants under both indentures, as applicable.

In April and August 2015, using proceeds from the IPO and the refinancing of the term loan described below, $288.2 million and $183.0 million, respectively, aggregate principal amount of the outstanding 2020 Notes were redeemed at a price equal to par plus an applicable premium. As a result of the redemptions, net charges of $14.1 million and $45.4 million were recognized in the three and nine months ended September 26, 2015, respectively. The fees included $18.2 million and $56.4 million for the applicable prepayment premium and $2.8 million and $7.5 million for the write-off of deferred financing fees, partially offset by $6.9 million and $18.5 million of net benefit from the write-off of the original issuance net premium in the three and nine months ended September 26, 2015, respectively.

Senior Secured Credit Facilities— Summit LLC has credit facilities that provide for term loans in an aggregate amount of $650.0 million and revolving credit commitments in an aggregate amount of $235.0 million (the “Senior Secured Credit Facilities”). Under the Senior Secured Credit Facilities, required principal repayments of 0.25% of term debt are due on the last business day of each March, June, September and December. The unpaid principal balance is due in full on the maturity date, which is July 17, 2022.

On July 17, 2015, Summit LLC refinanced its term loan under the Senior Secured Credit Facilities (the “Refinancing”). The Refinancing, among other things: (i) reduced the applicable margins used to calculate interest rates for term loans under our Senior Secured Credit Facilities to 3.25% for LIBOR rate loans and 2.25% for base rate loans, subject to a LIBOR floor of 1.00% (and one 25 basis point step down upon Summit LLC achieving a certain first lien net leverage ratio); (ii) increased term loans borrowed under our term loan facility from $422.0 million to an aggregate $650.0 million; and (iii) created additional flexibility under the financial maintenance covenants, which are tested quarterly, by increasing the applicable maximum Consolidated First Lien Net Leverage Ratio (as defined in the credit agreement governing the Senior Secured Credit Facilities).

On March 11, 2015, Summit LLC entered into Amendment No. 3 to the credit agreement governing the Senior Secured Credit Facilities, which became effective on March 17, 2015 upon the consummation of the IPO. The amendment: (i) increased the size of the revolving credit facility from $150.0 million to $235.0 million; (ii) extended the maturity date of the revolving credit facility to March 11, 2020; (iii) amended certain covenants; and (iv) permits periodic tax distributions as contemplated in a tax receivable agreement, dated as of March 11, 2015, with Summit Holdings. As a result of this amendment, a charge of $0.4 million of deferred financing was recognized in the nine months ended September 26, 2015.

The revolving credit facility bears interest per annum equal to, at Summit LLC’s option, either (i) a base rate determined by reference to the highest of (a) the federal funds rate plus 0.50%, (b) the prime rate of Bank of America, N.A. and (c) LIBOR plus 1.00%, plus an applicable margin of 2.5% for base rate loans or (ii) a LIBOR rate determined by reference to Reuters prior to the interest period relevant to such borrowing adjusted for certain additional costs plus an applicable margin of 3.5% for LIBOR rate loans. The interest rate in effect at September 26, 2015 was 3.6%.

There were $60.0 million of outstanding borrowings under the revolving credit facility as of September 26, 2015, leaving remaining borrowing capacity of $150.6 million, which is net of $24.4 million of outstanding letters of credit. The outstanding letters of credit are renewed annually and support required bonding on construction projects and the Company’s insurance liabilities.

Summit LLC’s Consolidated First Lien Net Leverage Ratio, as such term is defined in the Senior Secured Credit Facilities, should be no greater than 4.75:1.0 as of each quarter-end. As of September 26, 2015 and December 27, 2014, Summit LLC was in compliance with all covenants.

Summit LLC’s wholly-owned domestic subsidiary companies, subject to certain exclusions and exceptions, are named as subsidiary guarantors of the 2020 Notes, the 2023 Notes and the Senior Secured Credit Facilities. In addition, Summit LLC has pledged substantially all of its assets as collateral, subject to certain exclusions and exceptions, for the Senior Secured Credit Facilities.

Interest expense related to debt totaled $17.8 million and $54.6 million in the three and nine months ended September 26, 2015, respectively, and $19.9 million and $56.4 million in the three and nine months ended September 27, 2014, respectively. The

13

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

following table presents the activity for the deferred financing fees for the nine months ended September 26, 2015 and September 27, 2014:

	Deferred financing fees
Balance — December 27, 2014	$	17,215
Loan origination fees		10,911
Amortization		(2,731	)
Write off of deferred financing fees		(12,135	)
Balance — September 26, 2015	$	13,260
Balance — December 28, 2013	$	11,485
Loan origination fees		9,281
Amortization		(2,875	)
Balance —September 27, 2014	$	17,891

Other—On January 15, 2015, the Company’s wholly-owned subsidiary in British Columbia, Canada entered into an agreement with HSBC for a (i) $6.0 million Canadian dollar (“CAD”) revolving credit commitment to be used for operating activities that bears interest per annum equal to the bank’s prime rate plus 0.20%, (ii) $0.5 million CAD revolving credit commitment to be used for capital equipment that bears interest per annum at the bank’s prime rate plus 0.90% and (iii) $0.4 million CAD revolving credit commitment to provide guarantees on behalf of that subsidiary. There were no amounts outstanding under this agreement as of September 26, 2015.

9. ACCUMULATED OTHER COMPREHENSIVE LOSS

The changes in each component of accumulated other comprehensive loss consisted of the following:

	Change in retirement plans			Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance — December 27, 2014	$	(9,730	)	$	(5,816	)	$	—		$	(15,546	)
Foreign currency translation adjustment		—			(11,531	)		—			(11,531	)
Loss on cash flow hedges		—			—			(1,010	)		(1,010	)
Balance — September 26, 2015	$	(9,730	)	$	(17,347	)	$	(1,010	)	$	(28,087	)
Balance — December 28, 2013	$	(6,045	)	$	—		$	—		$	(6,045	)
Postretirement curtailment adjustment		(942	)		—			—			(942	)
Postretirement liability adjustment		1,515			—			—			1,515
Foreign currency translation adjustment		—			(1,764	)		—			(1,764	)
Balance —September 27, 2014	$	(5,472	)	$	(1,764	)	$	—		$	(7,236	)

14

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

10. INCOME TAXES

Summit LLC is a limited liability company and passes its tax attributes for federal and state tax purposes to its parent company and is generally not subject to federal or state income tax. However, certain subsidiary entities file federal and state income tax returns due to their status as C corporations. The provision for income taxes is primarily composed of federal, state and local income taxes for the subsidiary entities that have C corporation status.

The effective income tax rate for these entities differs from the statutory federal rate primarily due to (1) tax depletion expense in excess of the expense recorded under U.S. GAAP, (2) state income taxes and the effect of graduated tax rates and (3) certain non-recurring items, such as differences in the treatment of transaction costs, which are often not deductible for tax purposes.

As of September 26, 2015 and December 27, 2014, the Company has not recognized any liabilities for uncertain tax positions. The Company records interest and penalties as a component of the income tax provision. No material interest or penalties were recognized in income tax expense during the three or nine months ended September 26, 2015 and September 27, 2014.

Tax Distributions – The holders of Summit Holdings’ LP Units, including Summit Inc., incur U.S. federal, state and local income taxes on their share of any taxable income of Summit Holdings. The limited partnership agreement of Summit Holdings provides for pro rata cash distributions (“tax distributions”) to the holders of the LP Units in an amount generally calculated to provide each holder of LP Units with sufficient cash to cover its tax liability in respect of the LP Units. In general, these tax distributions are computed based on Summit Holdings’ estimated taxable income allocated to each holder of LP Units multiplied by an assumed tax rate equal to the highest effective marginal combined U.S. federal, state and local income tax rate applicable to an individual or corporate resident in New York, New York (or a corporate resident in certain circumstances). Summit LLC paid distributions totaling $23.5 million and $39.9 million, of which $14.6 million and $26.4 million was paid to Summit Holdings, who, in turn, distributed the funds to its partners, other than Summit Inc., and $8.9 million and $13.5 million was paid to Summit Inc., in the three and nine months ended September 26, 2015, respectively.

11. COMMITMENTS AND CONTINGENCIES

The Company is party to certain legal actions arising from the ordinary course of business activities. Accruals are recorded when the outcome is probable and can be reasonably estimated. While the ultimate results of claims and litigation cannot be predicted with certainty, management expects that the ultimate resolution of all pending or threatened claims and litigation will not have a material effect on the Company’s consolidated results of operations, financial position or liquidity. The Company records legal fees as incurred.

Litigation and Claims—The Company is obligated under an indemnification agreement entered into with the sellers of Harper Contracting, Inc., Harper Sand and Gravel, Inc., Harper Excavating, Inc., Harper Ready Mix Company, Inc. and Harper Investments, Inc. (collectively, “Harper”) for the sellers’ 40% ownership interests in a joint venture agreement. The Company has the rights to any benefits under the joint venture as well as the assumption of any obligations, but does not own equity interests in the joint venture. The joint venture incurred significant losses on a highway project in Utah, which resulted in requests for funding from the joint venture partners and, ultimately, from the Company. Through September 26, 2015, the Company has funded $8.8 million, of which $4.0 million was funded in 2012 and $4.8 million was funded in 2011. On April 2, 2015, the Utah Department of Transportation filed suit in the Fourth District Court of Utah County, Utah against the joint venture and the parties to the joint venture seeking damages of at least $29.4 million. As of September 26, 2015 and December 27, 2014, an accrual of $4.3 million was recorded in other noncurrent liabilities as management’s best estimate of loss related to this matter.

During the ordinary course of business, there may be revisions to project costs and conditions that can give rise to change orders on construction contracts. Revisions can also result in claims made against a customer or subcontractor to recover project variances that have not been satisfactorily addressed through change orders with a customer. The Company had unapproved change orders and claims of $1.2 million in accounts receivable and $3.9 million ($1.2 million in accounts receivable, $0.5 million in costs and estimated earnings in excess of billings and $2.2 million in other assets) as of September 26, 2015 and December 27, 2014, respectively.

Environmental Remediation—The Company’s operations are subject to and affected by federal, state, provincial and local laws and regulations relating to the environment, health and safety and other regulatory matters. These operations require environmental operating permits, which are subject to modification, renewal and revocation. The Company regularly monitors and reviews its operations, procedures and policies for compliance with these laws and regulations. Despite these compliance efforts, risk of environmental liability is inherent in the operation of the Company’s business, as it is with other companies engaged in similar businesses, and there can be no assurance that environmental liabilities or noncompliance will not have a material adverse effect on the Company’s consolidated financial position, results of operations or liquidity in the future.

15

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

Other—In the ordinary course of business, the Company enters into various firm purchase commitments for certain raw materials and services. The terms of the firm purchase commitments are generally less than one year. Management does not expect any significant changes in the market value of these goods and services during the commitment period that would have a material adverse effect on the financial position, results of operations or liquidity of the Company.

12. SUPPLEMENTAL CASH FLOW INFORMATION

Supplemental cash flow information is as follows:

	Nine months ended
	September 26,			September 27,
	2015			2014
Cash payments:
Interest	$	75,990		$	59,179
Income taxes		1,516			1,345
Non cash financing activities:
Purchase of noncontrolling interest in Continental Cement	$	(64,102	)	$	—

13. SEGMENT INFORMATION

The Company has three operating segments, which are its reportable segments: the West; Central; and East regions. These segments are consistent with the Company’s management reporting structure. Each region’s operations consist of various activities related to the production, distribution and sale of construction materials, products and the provision of paving and related services. Assets employed by segment include assets directly identified with those operations. Corporate assets consist primarily of cash, property, plant and equipment for corporate operations and other assets not directly identifiable with a reportable business segment. The accounting policies applicable to each segment are consistent with those used in preparing the consolidated financial statements. The following tables display selected financial data for the Company’s reportable segments:

	Three months ended				Nine months ended
	September 26,		September 27,		September 26,		September 27,
	2015		2014		2015		2014
Revenue:
West region	$	261,742	$	211,302	$	597,484	$	478,432
Central region		164,084		126,882		338,613		283,541
East region		46,079		56,575		94,738		108,172
Total revenue	$	471,905	$	394,759	$	1,030,835	$	870,145

16

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

	Three months ended						Nine months ended
	September 26,			September 27,			September 26,			September 27,
	2015			2014			2015			2014
Adjusted EBITDA
West region	$	59,574		$	39,105		$	110,940		$	71,646
Central region		53,756			30,820			89,984			59,220
East region		13,383			11,868			15,096			10,462
Corporate and other		(8,879	)		(9,381	)		(33,577	)		(28,427	)
Total reportable segments and corporate		117,834			72,412			182,443			112,901
Interest expense		20,436			22,085			61,649			62,555
Depreciation, depletion, amortization and accretion		33,306			23,255			86,818			63,950
Initial public offering costs		—			—			28,296			—
Loss on debt financings		32,641			—			64,313			—
Income (loss) from continuing operations before taxes	$	31,451		$	27,072		$	(58,633	)	$	(13,604	)

	Nine months ended
	September 26,		September 27,
	2015		2014
Cash paid for capital expenditures:
West region	$	32,192	$	25,496
Central region		24,335		28,485
East region		9,401		6,590
Total reportable segments		65,928		60,571
Corporate and other		3,744		3,673
Total capital expenditures	$	69,672	$	64,244

	Three months ended				Nine months ended
	September 26,		September 27,		September 26,		September 27,
	2015		2014		2015		2014
Depreciation, depletion, amortization and accretion:
West region	$	13,786	$	9,155	$	38,508	$	23,569
Central region		15,778		9,710		37,198		28,061
East region		3,114		3,984		9,426		11,272
Total reportable segments		32,678		22,849		85,132		62,902
Corporate and other		628		406		1,686		1,048
Total depreciation, depletion, amortization and accretion	$	33,306	$	23,255	$	86,818	$	63,950

17

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

	September 26,		December 27,
	2015		2014
Total assets:
West region	$	866,516	$	777,981
Central region		1,189,565		704,134
East region		224,720		221,598
Total reportable segments		2,280,801		1,703,713
Corporate and other		35,935		26,064
Total	$	2,316,736	$	1,729,777

	Three months ended						Nine months ended
	September 26,			September 27,			September 26,			September 27,
	2015			2014			2015			2014
Revenue by product:*
Aggregates	$	86,070		$	68,636		$	218,336		$	160,002
Cement		68,481			34,171			110,477			69,435
Ready-mixed concrete		95,481			75,429			254,878			189,198
Asphalt		113,249			104,862			219,492			203,944
Paving and related services		185,092			191,157			366,321			391,925
Other		(76,468	)		(79,496	)		(138,669	)		(144,359	)
Total revenue	$	471,905		$	394,759		$	1,030,835		$	870,145

* Revenue by product includes intercompany and intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other. Revenue from the liquid asphalt terminals is included in asphalt revenue.

14. RELATED PARTY TRANSACTIONS

Under the terms of a transaction and management fee agreement between Summit Holdings and Blackstone Management Partners L.L.C. (“BMP”), whose affiliates include controlling stockholders of Summit Inc., BMP provided monitoring, advisory and consulting services to the Company through March 17, 2015. Under the terms of the agreement, BMP was permitted to assign, and had assigned, a portion of the fees to which it was entitled to Silverhawk Summit, L.P. and to certain other equity investors.

The management fee was calculated based on the greater of $300,000 or 2.0% of the Company’s annual consolidated profit, as defined in the agreement, and is included in general and administrative expenses. The Company incurred management fees totaling $1.0 million during the period between December 28, 2014 and March 17, 2015 and $1.3 million and $2.3 million in the three and nine months ended September 27, 2014, respectively. During these periods, the Company paid immaterial amounts to Silverhawk Summit, L.P. and to other equity investors.

Also under the terms of the transaction and management fee agreement, BMP undertook financial and structural analysis, due diligence investigations, corporate strategy and other advisory services and negotiation assistance related to acquisitions for which the Company paid BMP transaction fees equal to 1.0% of the aggregate enterprise value of any acquired entity or, if such transaction was structured as an asset purchase or sale, 1.0% of the consideration paid for or received in respect of the assets acquired or disposed. The Company paid BMP $0.6 million and $2.3 million during the three and nine months ended September 27, 2014, respectively. During these periods, the Company paid immaterial amounts to Silverhawk Summit, L.P. and to other equity investors. The acquisition-related fees paid pursuant to this agreement are included in transaction costs.

In connection with the IPO, the transaction and management fee agreement with BMP was terminated on March 17, 2015 for a final payment of $13.8 million; $13.4 million was paid to affiliates of BMP and the remaining $0.4 million was paid to affiliates of Silverhawk Summit, L.P. and to certain other equity investors.

18

SUMMIT MATERIALS, LLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Tables in thousands)

In addition to the transaction and management fees paid to BMP, the Company reimburses BMP for direct expenses incurred, which were not material in the three and nine months ended September 26, 2015 and September 27, 2014.

On July 17, 2015, the Company purchased the Davenport Assets from Lafarge North America Inc. for a purchase price of $450.0 million in cash and a cement distribution terminal in Bettendorf, Iowa. At closing, $370.0 million of the purchase price was paid, and the remaining $80.0 million was paid on August 13, 2015. Summit Holdings entered into a commitment letter dated April 16, 2015, with Blackstone Capital Partners V L.P. (“BCP”) for equity financing up to $90.0 million in the form of a preferred equity interest (the “Equity Commitment Financing”), which would have been used to pay the $80.0 million deferred purchase price if other financing was not attained by December 31, 2015. For the Equity Commitment Financing, the Company paid a $1.8 million commitment fee to BCP in the nine months ended September 26, 2015.

Blackstone Advisory Partners L.P., an affiliate of BMP, served as an initial purchaser of $5.75 million and $13.0 million principal amount of the 2020 Notes issued in September 2014 and January 2014, respectively, and received compensation in connection therewith.

Cement sales to companies owned by a former noncontrolling member of Continental Cement were approximately $1.4 million during the period between December 28, 2014 and March 11, 2015 and $4.7 million and $10.9 million during the three and nine months ended September 27, 2014, respectively. Accounts receivable due from the former noncontrolling member were $0.2 million as of December 27, 2014.

In the nine months ended September 27, 2014, the Company made an interest payment of $0.7 million to a certain former noncontrolling member of Continental Cement for a related party note. The principal balance on the note was repaid in 2012.

In the nine months ended September 27, 2014, the Company sold certain assets associated with the production of concrete blocks, including inventory and equipment, to a related party for $2.3 million.

15. GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION

Summit LLC’s domestic wholly-owned subsidiary companies other than Finance Corp. are named as guarantors (collectively, the “Guarantors”) of the 2020 Notes and the 2023 Notes (collectively, the “Senior Notes”). Certain other partially-owned subsidiaries and a non-U.S. entity do not guarantee the Senior Notes (collectively, the “Non-Guarantors”). The Guarantors provide a joint and several, full and unconditional guarantee of the Senior Notes.

There are no significant restrictions on Summit LLC’s ability to obtain funds from any of the Guarantor Subsidiaries in the form of dividends or loans. Additionally, there are no significant restrictions on a Guarantor Subsidiary’s ability to obtain funds from Summit LLC or its direct or indirect subsidiaries.

The following condensed consolidating balance sheets, statements of operations and cash flows are provided for the Issuers, the Wholly-owned Guarantors and the Non-Guarantors. On March 17, 2015, the noncontrolling interests of Continental Cement were purchased resulting in Continental Cement being a wholly-owned indirect subsidiary of Summit LLC. Continental Cement’s results of operations and cash flows are reflected with the Guarantors for the three and nine months ended September 26, 2015. In 2014, Continental Cement’s results are shown separately as a Non Wholly-owned Guarantor.

Earnings from subsidiaries are included in other income in the condensed consolidated statements of operations below. The financial information may not necessarily be indicative of the financial position, results of operations or cash flows had the guarantor or non-guarantor subsidiaries operated as independent entities.

19

Condensed Consolidating Balance Sheets

September 26, 2015

	Issuers		Wholly- owned Guarantors		Non- Guarantors		Eliminations			Consolidated
Assets
Current assets:
Cash and cash equivalents	$	8,989	$	1,025	$	8,130	$	(12,662	)	$	5,482
Accounts receivable, net		—		195,120		11,163		(344	)		205,939
Intercompany receivables		1,322,050		14,869		8,996		(1,345,915	)		—
Cost and estimated earnings in excess of billings		—		33,447		728		—			34,175
Inventories		—		132,734		5,302		—			138,036
Other current assets		1,088		19,319		1,355		—			21,762
Total current assets		1,332,127		396,514		35,674		(1,358,921	)		405,394
Property, plant and equipment, net		9,433		1,240,126		26,668		—			1,276,227
Goodwill		—		519,759		48,077		—			567,836
Intangible assets, net		—		14,044		1,437		—			15,481
Other assets		881,923		132,532		1,271		(963,928	)		51,798
Total assets	$	2,223,483	$	2,302,975	$	113,127	$	(2,322,849	)	$	2,316,736
Liabilities, Redeemable Noncontrolling Interest and Member’s Interest
Current liabilities:
Current portion of debt	$	68,125	$	—	$	—	$	—		$	68,125
Current portion of acquisition-related liabilities		—		17,691		—		—			17,691
Accounts payable		7,436		102,571		3,563		(344	)		113,226
Accrued expenses		30,998		70,386		2,158		(12,662	)		90,880
Intercompany payables		67,671		1,274,510		3,734		(1,345,915	)		—
Billings in excess of costs and estimated earnings		—		10,983		22		—			11,005
Total current liabilities		174,230		1,476,141		9,477		(1,358,921	)		300,927
Long-term debt		1,148,068		61,377		—		(61,377	)		1,148,068
Acquisition-related liabilities		—		33,320		—		—			33,320
Other noncurrent liabilities		1,558		110,856		57,268		(55,107	)		114,575
Total liabilities		1,323,856		1,681,694		66,745		(1,475,405	)		1,596,890
Redeemable noncontrolling interest		—		—		—		—			—
Redeemable members’ interest		—		—		—		—			—
Total stockholders’ equity/partners’ interest		899,627		621,281		46,382		(847,444	)		719,846
Total liabilities, redeemable noncontrolling interest and member’s interest	$	2,223,483	$	2,302,975	$	113,127	$	(2,322,849	)	$	2,316,736

20

Condensed Consolidating Balance Sheets

December 27, 2014

	Issuers		Non- Wholly- owned Guarantor		Wholly- owned Guarantors		Non- Guarantors		Elim- inations			Consol- idated
Assets
Current assets:
Cash and cash equivalents	$	10,837	$	2	$	695	$	8,793	$	(7,112	)	$	13,215
Accounts receivable, net		1		6,629		124,380		11,525		(1,233	)		141,302
Intercompany receivables		376,344		4,095		30,539		4,052		(415,030	)		—
Cost and estimated earnings in excess of billings		—		—		9,819		355		—			10,174
Inventories		—		8,696		98,188		4,669		—			111,553
Other current assets		7,148		464		9,638		1,775		(1,853	)		17,172
Total current assets		394,330		19,886		273,259		31,169		(425,228	)		293,416
Property, plant and equipment, net		7,035		302,524		610,717		30,325		—			950,601
Goodwill		—		23,124		340,969		55,177		—			419,270
Intangible assets, net		—		542		14,245		2,860		—			17,647
Other assets		1,153,204		25,233		125,462		1,362		(1,256,418	)		48,843
Total assets	$	1,554,569	$	371,309	$	1,364,652	$	120,893	$	(1,681,646	)	$	1,729,777
Liabilities, Redeemable Noncontrolling Interest and Member’s Interest
Current liabilities:
Current portion of debt	$	5,275	$	1,273	$	3,990	$	—	$	(5,263	)	$	5,275
Current portion of acquisition-related liabilities		166		—		18,236		—		—			18,402
Accounts payable		3,655		6,845		65,018		4,569		(1,233	)		78,854
Accrued expenses		37,101		10,178		59,477		3,705		(8,965	)		101,496
Intercompany payables		162,728		4,052		245,416		2,834		(415,030	)		—
Billings in excess of costs and estimated earnings		—		—		8,931		27		—			8,958
Total current liabilities		208,925		22,348		401,068		11,135		(430,491	)		212,985
Long-term debt		1,059,642		153,318		480,599		—		(633,917	)		1,059,642
Acquisition-related liabilities		—		—		42,736		—		—			42,736
Other noncurrent liabilities		796		24,787		65,479		57,736		(55,107	)		93,691
Total liabilities		1,269,363		200,453		989,882		68,871		(1,119,515	)		1,409,054
Redeemable noncontrolling interest		—		—		—		—		33,740			33,740
Redeemable members’ interest		—		34,543		—		—		(34,543	)		—
Total stockholders’ equity/partners’ interest		285,206		136,313		374,770		52,022		(561,328	)		286,983
Total liabilities, redeemable noncontrolling interest and member’s interest	$	1,554,569	$	371,309	$	1,364,652	$	120,893	$	(1,681,646	)	$	1,729,777

21

Condensed Consolidating Statements of Operations

For the three months ended September 26, 2015

	Issuers			Wholly- owned Guarantors			Non- Guarantors			Eliminations			Consolidated
Revenue	$	—		$	454,501		$	21,472		$	(4,068	)	$	471,905
Cost of revenue (excluding items shown separately below)		—			304,204			12,263			(4,068	)		312,399
General and administrative expenses		8,881			32,362			1,600			—			42,843
Depreciation, depletion, amortization and accretion		628			31,374			1,304			—			33,306
Operating (loss) income		(9,509	)		86,561			6,305			—			83,357
Other (income) expense, net		(58,666	)		3,639			(17	)		86,514			31,470
Interest expense		15,046			15,286			900			(10,796	)		20,436
Income from continuing operations before taxes		34,111			67,636			5,422			(75,718	)		31,451
Income tax benefit (expense)		—			(2,690	)		35			—			(2,655	)
Income from continuing operations		34,111			70,326			5,387			(75,718	)		34,106
Income from discontinued operations		—			(57	)		—			—			(57	)
Net income		34,111			70,383			5,387			(75,718	)		34,163
Net income attributable to minority interest		—			—			—			52			52
Net income attributable to member of Summit Materials, LLC	$	34,111		$	70,383		$	5,387		$	(75,770	)	$	34,111
Comprehensive income attributable to member of Summit Materials, LLC	$	26,805		$	69,373		$	(909	)	$	(68,464	)	$	26,805

22

Condensed Consolidating Statements of Operations

For the three months ended September 27, 2014

	Issuers			Non- Wholly- owned Guarantor			Wholly- owned Guarantors			Non- Guarantors			Elim- inations			Consol- idated
Revenue	$	—		$	34,171		$	348,785		$	22,626		$	(10,823	)	$	394,759
Cost of revenue (excluding items shown separately below)		—			25,603			253,284			17,433			(10,823	)		285,497
General and administrative expenses		8,694			1,651			27,418			495			—			38,258
Depreciation, depletion, amortization and accretion		406			3,708			18,618			523			—			23,255
Operating (loss) income		(9,100	)		3,209			49,465			4,175			—			47,749
Other (income) expense, net		(43,887	)		(945	)		(2,679	)		(16	)		46,119			(1,408	)
Interest expense		7,913			2,931			13,416			233			(2,408	)		22,085
Income from continuing operations before taxes		26,874			1,223			38,728			3,958			(43,711	)		27,072
Income tax benefit (expense)		—			—			(1,038	)		—			—			(1,038	)
Income from continuing operations		26,874			1,223			39,766			3,958			(43,711	)		28,110
Income from discontinued operations		—			—			(7	)		—			—			(7	)
Net income		26,874			1,223			39,773			3,958			(43,711	)		28,117
Net income attributable to minority interest		—			—			—			—			1,243			1,243
Net income attributable to member of Summit Materials, LLC	$	26,874		$	1,223		$	39,773		$	3,958		$	(44,954	)	$	26,874
Comprehensive income attributable to member of Summit Materials, LLC	$	25,110		$	1,223		$	39,773		$	2,194		$	(43,190	)	$	25,110

23

Condensed Consolidating Statements of Operations

For the nine months ended September 26, 2015

	Issuers			Wholly- owned Guarantors			Non- Guarantors		Eliminations			Consolidated
Revenue	$	—		$	980,153		$	78,821	$	(28,139	)	$	1,030,835
Cost of revenue (excluding items shown separately below)		—			696,068			51,909		(28,139	)		719,838
General and administrative expenses		61,634			90,959			4,935		—			157,528
Depreciation, depletion, amortization and accretion		1,686			80,997			4,135		—			86,818
Operating (loss) income		(63,320	)		112,129			17,842		—			66,651
Other (income) expense, net		(55,083	)		7,140			142		111,436			63,635
Interest expense		35,196			45,332			2,689		(21,568	)		61,649
Income from continuing operations before taxes		(43,433	)		59,657			15,011		(89,868	)		(58,633	)
Income tax benefit (expense)		—			(12,852	)		384		—			(12,468	)
Income from continuing operations		(43,433	)		72,509			14,627		(89,868	)		(46,165	)
Income from discontinued operations		—			(815	)		—		—			(815	)
Net income		(43,433	)		73,324			14,627		(89,868	)		(45,350	)
Net income attributable to minority interest		—			—			—		(1,917	)		(1,917	)
Net income attributable to member of Summit Materials, LLC	$	(43,433	)	$	73,324		$	14,627	$	(87,951	)	$	(43,433	)
Comprehensive income attributable to member of Summit Materials, LLC	$	(55,974	)	$	72,314		$	3,096	$	(75,410	)	$	(55,974	)

24

Condensed Consolidating Statements of Operations

For the nine months ended September 27, 2014

	Issuers			Non- Wholly- owned Guarantor			Wholly- owned Guarantors			Non- Guarantors		Elim- inations			Consol- idated
Revenue	$	—		$	69,435		$	776,502		$	43,900	$	(19,692	)	$	870,145
Cost of revenue (excluding items shown separately below)		—			53,229			581,602			30,795		(19,692	)		645,934
General and administrative expenses		26,384			5,225			80,938			1,062		—			113,609
Depreciation, depletion, amortization and accretion		1,047			10,484			51,351			1,068		—			63,950
Operating (loss) income		(27,431	)		497			62,611			10,975		—			46,652
Other expense (income), net		(36,161	)		(2,303	)		(4,233	)		29		40,369			(2,299	)
Interest expense		21,581			8,788			37,831			289		(5,934	)		62,555
(Loss) income from continuing operations before taxes		(12,851	)		(5,988	)		29,013			10,657		(34,435	)		(13,604	)
Income tax benefit		(1,427	)		—			(1,071	)		—		—			(2,498	)
(Loss) income from continuing operations		(11,424	)		(5,988	)		30,084			10,657		(34,435	)		(11,106	)
Income from discontinued operations		—			—			(356	)		—		—			(356	)
Net (loss) income		(11,424	)		(5,988	)		30,440			10,657		(34,435	)		(10,750	)
Net loss attributable to noncontrolling interest		—			—			—			—		674			674
Net (loss) income attributable to member of Summit Materials, LLC	$	(11,424	)	$	(5,988	)	$	30,440		$	10,657	$	(35,109	)	$	(11,424	)
Comprehensive (loss) income attributable to member of Summit Materials, LLC	$	(12,615	)		(5,170	)	$	30,440		$	8,893	$	(34,163	)	$	(12,615	)

25

Condensed Consolidating Statements of Cash Flows

For the nine months ended September 26, 2015

	Issuers			Wholly- owned Guarantors			Non- Guarantors			Elim- inations			Consol- idated
Net cash (used in) provided by operating activities	$	(140,504	)	$	112,541		$	9,203		$	(167	)	$	(18,927	)
Cash flow from investing activities:
Acquisitions, net of cash acquired		—			(505,466	)		—			—			(505,466	)
Purchase of property, plant and equipment		(3,743	)		(65,001	)		(928	)		—			(69,672	)
Proceeds from the sale of property, plant, and equipment		—			8,821			62			—			8,883
Other		—			610			—			—			610
Net cash used for investing activities		(3,743	)		(561,036	)		(866	)		—			(565,645	)
Cash flow from financing activities:
Proceeds from investment by member		490,916			—			—			—			490,916
Capital issuance costs		(12,539	)		—			—			—			(12,539	)
Net proceeds from debt issuance		1,415,750			—			—			—			1,415,750
Loans received from and payments made on loans from other Summit Companies		(1,031,576	)		1,047,015			(9,000	)		(6,439	)		—
Payments on long-term debt		(669,123	)		(583,340	)		—			1,056			(1,251,407	)
Payments on acquisition-related liabilities		(166	)		(14,852	)		—			—			(15,018	)
Financing costs		(10,911	)		—			—			—			(10,911	)
Distributions from partnership		(39,952	)		—			—			—			(39,952	)
Other		—			—			—			—			—
Net cash provided by (used for) financing activities		142,399			448,823			(9,000	)		(5,383	)		576,839
Net increase (decrease) in cash		(1,848	)		328			(663	)		(5,550	)		(7,733	)
Cash — Beginning of period		10,837			697			8,793			(7,112	)		13,215
Cash— End of period	$	8,989		$	1,025		$	8,130		$	(12,662	)	$	5,482

26

Condensed Consolidating Statements of Cash Flows

For the nine months ended September 27, 2014

	Issuers			Non- Wholly- owned Guarantor			Wholly- owned Guarantors			Non- Guarantors			Elim- inations			Consol- idated
Net cash used in operating activities	$	(36,504	)	$	(2,408	)	$	28,727		$	668		$	(1,319	)	$	(10,836	)
Cash flow from investing activities:
Acquisitions, net of cash acquired		(181,754	)		—			(170,187	)		—			—			(351,941	)
Purchase of property, plant and equipment		(3,674	)		(13,472	)		(46,575	)		(523	)		—			(64,244	)
Proceeds from the sale of property, plant, and equipment		—			—			9,345			230			—			9,575
Other		—			—			(409	)		—			1,166			757
Net cash (used for) provided by investing activities		(185,428	)		(13,472	)		(207,826	)		(293	)		1,166			(405,853	)
Cash flow from financing activities:
Proceeds from investment by member		24,350			—			—			1,353			(1,353	)		24,350
Net proceeds from debt issuance		657,217			—			—			—			—			657,217
Loans received from and payments made on loans from other Summit Companies		(195,590	)		16,383			189,243			(2,113	)		(7,923	)		—
Payments on long-term debt		(251,062	)		(509	)		(6,766	)		—			—			(258,337	)
Payments on acquisition-related liabilities		(1,500	)		—			(4,307	)		—			—			(5,807	)
Financing costs		(8,834	)		—			—			—			—			(8,834	)
Other		(88	)		—			(1,500	)		—			1,500			(88	)
Net cash provided by (used for) financing activities		224,493			15,874			176,670			(760	)		(7,776	)		408,501
Net increase (decrease) in cash		2,561			(6	)		(2,429	)		(385	)		(7,929	)		(8,188	)
Cash — Beginning of period		10,375			9			3,442			3,631			(2,540	)		14,917
Cash— End of period	$	12,936		$	3		$	1,013		$	3,246		$	(10,469	)	$	6,729

* * *

27

XML

Summary of Organization and Significant Accounting Policies - Schedule of Carrying Value and Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 26, 2015	Dec. 27, 2014
Debt Instrument [Line Items]
Long-term debt, Carrying Value	$ 1,156,193	$ 1,064,917
Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	1,156,193	1,064,917
Level 2 [Member]
Debt Instrument [Line Items]
Long-term debt, Fair Value	1,155,557	1,101,873
Long-term debt, Carrying Value	1,156,193	1,064,917
Level 2 [Member] | Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Long-term debt, Fair Value	1,155,557	1,101,873
Long-term debt, Carrying Value	1,156,193	1,064,917
Level 3 [Member]
Debt Instrument [Line Items]
Current portion of deferred consideration and noncompete obligations, Fair Value	15,632	16,027
Long term portion of deferred consideration and noncompete obligations, Fair Value	39,267	37,357
Current portion of deferred consideration and noncompete obligations, Carrying Value	15,632	16,027
Long term portion of deferred consideration and noncompete obligations, Carrying Value	39,267	37,357
Level 3 [Member] | Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Current portion of deferred consideration and noncompete obligations, Fair Value	13,132	16,027
Long term portion of deferred consideration and noncompete obligations, Fair Value	30,609	37,357
Current portion of deferred consideration and noncompete obligations, Carrying Value	13,132	16,027
Long term portion of deferred consideration and noncompete obligations, Carrying Value	$ 30,609	$ 37,357

XML

Debt - Summary of Activity for Deferred Financing Fees (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014
Deferred Financing Cost [Line Items]
Beginning balance	$ 17,215	$ 11,485
Loan origination fees	10,911	9,281
Amortization	(2,731)	(2,875)
Write off of deferred financing fees	(12,135)
Ending balance	13,260	17,891
Summit Materials, LLC [Member]
Deferred Financing Cost [Line Items]
Beginning balance	17,215	11,485
Loan origination fees	10,911	9,281
Amortization	(2,731)	(2,875)
Write off of deferred financing fees	(12,135)
Ending balance	$ 13,260	$ 17,891

XML

Accrued Expenses - Components of Accrued Expenses (Detail) - USD ($) $ in Thousands	Sep. 26, 2015	Dec. 27, 2014
Schedule Of Accrued Expenses [Line Items]
Interest	$ 12,973	$ 32,475
Payroll and benefits	22,095	20,326
Capital lease obligations	16,065	17,530
Insurance	13,710	11,402
Non-income taxes	10,221	5,520
Professional fees	1,305	3,299
Other	14,511	10,944
Total	90,880	101,496
Summit Materials, LLC [Member]
Schedule Of Accrued Expenses [Line Items]
Interest	12,973	32,475
Payroll and benefits	22,095	20,326
Capital lease obligations	16,065	17,530
Insurance	13,710	11,402
Non-income taxes	10,221	5,520
Professional fees	1,305	3,299
Other	14,511	10,944
Total	$ 90,880	$ 101,496

XML

Debt - Other - Additional Information (Detail) - Other [Member] CAD in Millions	Jan. 15, 2015 CAD
Columbia [Member] | Prime Rate [Member]
Debt Instrument [Line Items]
Prime rate	0.20%
Columbia [Member] | Prime Rate [Member] | Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Prime rate	0.20%
Canada [Member] | Prime Rate [Member]
Debt Instrument [Line Items]
Prime rate	0.90%
Canada [Member] | Prime Rate [Member] | Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Prime rate	0.90%
Revolving Credit Facility [Member] | Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Revolving credit commitment	CAD 0.4
Revolving Credit Facility [Member] | Columbia [Member]
Debt Instrument [Line Items]
Revolving credit commitment	6.0
Revolving Credit Facility [Member] | Columbia [Member] | Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Revolving credit commitment	6.0
Revolving Credit Facility [Member] | Canada [Member]
Debt Instrument [Line Items]
Revolving credit commitment	0.5
Revolving Credit Facility [Member] | Canada [Member] | Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Revolving credit commitment	0.5
Revolving Credit Facility [Member] | Mainland [Member]
Debt Instrument [Line Items]
Revolving credit commitment	CAD 0.4

XML

Accounts Receivable, Net - Summary of Accounts Receivable, Net (Detail) - USD ($) $ in Thousands	Sep. 26, 2015	Dec. 27, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable	$ 194,235	$ 131,060
Retention receivables	13,396	12,053
Receivables from related parties	705	333
Accounts receivable	208,336	143,446
Less: Allowance for doubtful accounts	(2,397)	(2,144)
Accounts receivable, net	205,939	141,302
Summit Materials, LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable	194,235	131,060
Retention receivables	13,396	12,053
Receivables from related parties	705	333
Accounts receivable	208,336	143,446
Less: Allowance for doubtful accounts	(2,397)	(2,144)
Accounts receivable, net	$ 205,939	$ 141,302

XML

Net Income Per Share (Tables)

9 Months Ended

Sep. 26, 2015

Earnings Per Share [Abstract]

Schedule of Basic to Diluted Loss Per Share

The following table reconciles basic to diluted loss per share:

	September 26, 2015
	Three months ended		Nine months ended
Net income attributable to Summit Inc.	$	14,711	$	4,355
Weighted-average common shares:
Weighted average shares of Class A shares		37,920,452		31,768,406
Basic earnings per share	$	0.39	$	0.14
Weighted average shares of Class A shares		37,920,452		31,768,406
Warrants		43,478		42,909
Weighted average dilutive shares		37,963,930		31,811,315
Diluted earnings per share	$	0.39	$	0.14

XML

Income Taxes - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended		9 Months Ended
	Aug. 31, 2015	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014	Dec. 27, 2014
Income Taxes [Line Items]
Liabilities for uncertain tax positions		$ 0		$ 0		$ 0		$ 0
Interest and penalties recognized in income tax expense		0	$ 0			0	$ 0
Deferred tax assets, net	$ 249,400,000	50,500,000		50,500,000		50,500,000
Deferred tax liability, intangible assets		69,000,000		69,000,000		69,000,000
Deferred tax liability, book aggregate reserves		6,900,000		6,900,000		6,900,000
Deferred tax liability, fixed assets		10,900,000		10,900,000		10,900,000
Valuation allowance	$ 249,400,000	299,900,000		299,900,000		299,900,000
Provision for income taxes		(2,655,000)	(1,038,000)			$ (12,468,000)	(2,498,000)
Percentage of benefits to be paid on tax receivable agreement						85.00%
Purchase of LP units	18,675,000
Liability percentage to holders	85.00%
Total dividend distribution		23,500,000				$ 39,900,000
Distributions paid in cash to Summit Holdings' partners		14,600,000				26,448,000
Distributions paid in cash to Summit Inc.		8,900,000				13,500,000
Limited Liability Company [Member]
Income Taxes [Line Items]
Provision for income taxes		0				0
Summit Materials, LLC [Member]
Income Taxes [Line Items]
Liabilities for uncertain tax positions		0		0		0		$ 0
Interest and penalties recognized in income tax expense		0	0	$ 0	$ 0
Provision for income taxes		(2,655,000)	$ (1,038,000)			(12,468,000)	$ (2,498,000)
Total dividend distribution		23,500,000				39,900,000
Distributions paid in cash to Summit Holdings' partners		14,600,000				39,952,000
Distributions paid in cash to Summit Inc.		$ 8,900,000				$ 13,500,000

XML

Summary of Organization and Significant Accounting Policies (Tables)

9 Months Ended

Sep. 26, 2015

Schedule of Contingent Consideration Obligations Measured at Fair Value

The fair value of contingent consideration and derivatives as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015		December 27, 2014
Current portion of derivatives and acquisition-related liabilities:
Contingent consideration	$	4,559	$	2,375
Cash flow hedge		114
Derivatives and acquisition- related liabilities:
Contingent consideration	$	2,711	$	5,379
Cash flow hedge		897

Schedule of Carrying Value and Fair Value of Financial Instruments

The carrying value and fair value of these financial instruments as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015				December 27, 2014
	Fair Value		Carrying Value		Fair Value		Carrying Value
Level 2
Long-term debt(1)	$	1,155,557	$	1,156,193	$	1,101,873	$	1,064,917
Level 3
Current portion of deferred consideration and noncompete obligations(2)		15,632		15,632		16,027		16,027
Long term portion of deferred consideration and noncompete obligations(3)		39,267		39,267		37,357		37,357

(1) $8.1 million and $5.3 million included in current portion of debt as of September 26, 2015 and December 27, 2014, respectively. Excludes $60.0 million outstanding on the revolving credit facility as of September 26, 2015.

(2) Included in current portion of acquisition-related liabilities on the balance sheet.

(3) Included in acquisition-related liabilities on the balance sheet.

Summit Materials, LLC [Member]

Schedule of Contingent Consideration Obligations Measured at Fair Value

The fair value of contingent consideration and derivatives as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015		December 27, 2014
Current portion of derivatives and acquisition-related liabilities:
Contingent consideration	$	4,559	$	2,375
Cash flow hedge		114
Derivatives and acquisition- related liabilities:
Contingent consideration	$	2,711	$	5,379
Cash flow hedge		897

Schedule of Carrying Value and Fair Value of Financial Instruments

The carrying value and fair value of these financial instruments as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015				December 27, 2014
	Fair Value		Carrying Value		Fair Value		Carrying Value
Level 2
Long-term debt(1)	$	1,155,557	$	1,156,193	$	1,101,873	$	1,064,917
Level 3
Current portion of deferred consideration and noncompete obligations(2)		13,132		13,132		16,027		16,027
Long term portion of deferred consideration and noncompete obligations(3)		30,609		30,609		37,357		37,357

(1) $8.1 million and $5.3 million included in current portion of debt as of September 26, 2015 and December 27, 2014, respectively. Excludes $60.0 million outstanding on the revolving credit facility as of September 26, 2015.

(2) Included in current portion of acquisition-related liabilities on the balance sheet.

(3) Included in acquisition-related liabilities on the balance sheet.

XML

Debt - Schedule of Debt (Parenthetical) (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 26, 2015	Dec. 27, 2014
10 1/2% Senior Notes, due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt, face value	$ 153.8	$ 625.0
Original issuance discount	$ 5.5	$ 26.5
Debt instrument interest rate	10.50%	10.50%
Debt instrument maturity year	Dec. 01, 2020	Dec. 01, 2020
10 1/2% Senior Notes, due 2020 [Member] | Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Long-term debt, face value	$ 153.8	$ 625.0
Original issuance discount	$ 5.5	$ 26.5
Debt instrument interest rate	10.50%	10.50%
Debt instrument maturity year	Dec. 01, 2020	Dec. 01, 2020
6 1/8% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.125%
Debt instrument maturity year	Jul. 15, 2023
6 1/8% Senior Notes, due 2023 [Member] | Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.125%
Debt instrument maturity year	Jul. 15, 2023
Term Loan, due 2022 [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt, face value	$ 650.0	$ 415.7
Original issuance discount	$ 3.1	$ 2.3
Debt instrument maturity year	Dec. 01, 2022	Dec. 01, 2022
Term Loan, due 2022 [Member] | Credit Facility [Member] | Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Long-term debt, face value	$ 650.0	$ 415.7
Original issuance discount	$ 3.1	$ 2.3
Debt instrument maturity year	Dec. 01, 2022	Dec. 01, 2022

XML

Acquisitions - Additional Information (Detail) - Davenport Acquisition [Member] - USD ($) $ in Thousands			9 Months Ended
	Sep. 26, 2015	Jul. 17, 2015	Sep. 26, 2015
Business Acquisition [Line Items]
Net cash paid for acquisitions	$ 448,710	$ 448,710
Pro forma adjustment, reduction of transaction costs			$ 4,500
Pro forma adjustment, additional depreciation, depletion, amortization and accretion			7,500
Summit Materials, LLC [Member]
Business Acquisition [Line Items]
Net cash paid for acquisitions	$ 448,710	$ 448,710
Pro forma adjustment, reduction of transaction costs			4,500
Pro forma adjustment, additional depreciation, depletion, amortization and accretion			$ 7,500

XML

Summary of Organization and Significant Accounting Policies - Additional Information (Detail)		2 Months Ended	3 Months Ended		5 Months Ended	9 Months Ended		12 Months Ended
	Aug. 11, 2015 USD ($) $ / shares shares	Sep. 26, 2015 USD ($) $ / shares shares	Sep. 26, 2015 USD ($) Customer $ / shares shares	Sep. 27, 2014 USD ($) Customer	Aug. 11, 2015 USD ($) $ / shares	Sep. 26, 2015 USD ($) Customer Segment State $ / shares shares	Sep. 27, 2014 USD ($) Customer	Dec. 27, 2014 USD ($)
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Number of operating segments | Segment						3
Date of incorporation						Sep. 23, 2014
Number of customers accounted for more than 10% of total revenue | Customer			0	0		0	0
Number of operating states | State						18
Reductions recognized in contingent consideration			$ 0	$ 0		$ 0	$ 0
Interest rate derivatives		$ 200,000,000	$ 200,000,000			200,000,000
Aggregate consideration for acquiring noncontrolling interests						497,848,000
Cash consideration						35,000,000
Aggregate principal amount of non-interest bearing notes payable						15,000,000
Annual installments amount of non-interest bearing notes payable						2,500,000
Decrease in other assets (noncurrent)						$ 524,000	$ 675,000
Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Number of operating segments | Segment						3
Date of incorporation						Sep. 23, 2014
Number of customers accounted for more than 10% of total revenue | Customer			0	0		0	0
Number of operating states | State						18
Reductions recognized in contingent consideration			$ 0	$ 0		$ 0	$ 0
Interest rate derivatives		$ 200,000,000	$ 200,000,000			200,000,000
Aggregate consideration for acquiring noncontrolling interests						64,100,000
Aggregate principal amount of non-interest bearing notes payable						15,000,000
Annual installments amount of non-interest bearing notes payable						2,500,000
Decrease in other assets (noncurrent)						524,000	$ 675,000
Cash consideration						35,000,000
Accounting Standards Update (ASU) 2015-03 [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Decrease in other assets (noncurrent)						8,800,000
Decrease in long-term debt								$ 16,800,000
Accounting Standards Update (ASU) 2015-03 [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Decrease in other assets (noncurrent)						$ (8,800,000)
Decrease in long-term debt								$ (16,800,000)
Level 3 [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Discount rate						11.00%
Level 3 [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Discount rate						11.00%
Variable Interest Entity, Primary Beneficiary [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Percentage of voting power						100.00%
Noncontrolling interest elimination percentage		50.70%			72.20%
Continental Cement Company, L.L.C. [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Redeemable noncontrolling interest percentage		30.00%	30.00%			30.00%
Continental Cement Company, L.L.C. [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Redeemable noncontrolling interest percentage		30.00%	30.00%			30.00%
Ohio Valley Asphalt, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Redeemable noncontrolling interest percentage		20.00%	20.00%			20.00%
Ohio Valley Asphalt, LLC [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Redeemable noncontrolling interest percentage		20.00%	20.00%			20.00%
Common Class A [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Class A common shares | shares						1,029,183
Common Class A [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Class A common shares | shares						1,029,183
10 1/2% Senior Notes, due 2020 [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Senior notes, interest rate		10.50%	10.50%			10.50%		10.50%
Debt instrument, face amount		$ 153,800,000	$ 153,800,000			$ 153,800,000		$ 625,000,000
10 1/2% Senior Notes, due 2020 [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Senior notes, interest rate		10.50%	10.50%			10.50%		10.50%
Debt instrument, face amount		$ 153,800,000	$ 153,800,000			$ 153,800,000		$ 625,000,000
Initial Public Offering [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Operations commenced date						Mar. 11, 2015
Net proceeds from IPO						$ 433,000,000
Initial Public Offering [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Operations commenced date						Mar. 11, 2015
Net proceeds from IPO						$ 433,000,000
Initial Public Offering [Member] | Blackstone Management Partners L.L.C. [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Payment of termination fee to affiliates of Sponsors						13,800,000
Initial Public Offering [Member] | Blackstone Management Partners L.L.C. [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Payment of termination fee to affiliates of Sponsors						$ 13,800,000
Initial Public Offering [Member] | Common Class A [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Class A common shares | shares						25,555,555
Class A Common stock offering price per share | $ / shares		$ 18.00	$ 18.00			$ 18.00
Initial Public Offering [Member] | Common Class A [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Class A common shares | shares						25,555,555
Class A Common stock offering price per share | $ / shares		$ 18.00	$ 18.00			$ 18.00
Initial Public Offering [Member] | 10 1/2% Senior Notes, due 2020 [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Senior notes, aggregate principal amount redeemed		$ 288,200,000	$ 288,200,000			$ 288,200,000
Senior notes, interest rate		10.50%	10.50%			10.50%
Senior notes, redemption date						Jan. 31, 2020
Debt instrument, face amount		$ 288,200,000	$ 288,200,000			$ 288,200,000
Debt Instrument, redemption premium						38,200,000
Accrued and unpaid interest		5,200,000	5,200,000			5,200,000
Initial Public Offering [Member] | 10 1/2% Senior Notes, due 2020 [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Senior notes, aggregate principal amount redeemed		$ 288,200,000	$ 288,200,000			$ 288,200,000
Senior notes, interest rate		10.50%	10.50%			10.50%
Senior notes, redemption date						Jan. 31, 2020
Debt instrument, face amount		$ 288,200,000	$ 288,200,000			$ 288,200,000
Debt Instrument, redemption premium						38,200,000
Accrued and unpaid interest		$ 5,200,000	$ 5,200,000			$ 5,200,000
Follow on Public Offering [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Class A common shares | shares	22,425,000
Class A Common stock offering price per share | $ / shares	$ 25.75				$ 25.75
Net proceeds from IPO	$ 555,800,000
Number of newly-issued shares purchased from Summit Holdings | shares	3,750,000
Number of shares purchased from outstanding shares of Summit Holding | shares	18,675,000
Amount of purchase price due	$ 80,000,000				$ 80,000,000
Follow on Public Offering [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Class A common shares | shares	22,425,000
Class A Common stock offering price per share | $ / shares	$ 25.75				$ 25.75
Net proceeds from IPO	$ 555,800,000
Number of newly-issued shares purchased from Summit Holdings | shares	3,750,000
Number of shares purchased from outstanding shares of Summit Holding | shares	18,675,000
Amount of purchase price due	$ 80,000,000				$ 80,000,000
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Customer accounted revenue			10.00%	10.00%		10.00%	10.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Customer accounted revenue			10.00%	10.00%		10.00%	10.00%
Class B Units [Member] | Initial Public Offering [Member] | Continental Cement Company, L.L.C. [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Class B capital units purchased | shares		71,428,571	71,428,571			71,428,571
Class B Units [Member] | Initial Public Offering [Member] | Continental Cement Company, L.L.C. [Member] | Summit Materials, LLC [Member]
Summary Of Significant Accounting Policies And Recent Accounting Pronouncements [Line Items]
Class B capital units purchased | shares		71,428,571	71,428,571			71,428,571

XML

Debt - Senior Notes - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 26, 2015	Sep. 26, 2015	Sep. 27, 2014	Dec. 27, 2014	Aug. 31, 2015	Apr. 30, 2015	Sep. 08, 2014	Jan. 17, 2014
Debt Instrument [Line Items]
Proceeds from issuance of debt		$ 1,415,750,000	$ 657,217,000
Premium of debt instrument	$ 2,393,000	2,393,000
Write off of deferred financing fees		$ 12,135,000
6 1/8% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Senior notes, interest rate	6.125%	6.125%
Debt instrument maturity year		Jul. 15, 2023
10 1/2% Senior Notes, due 2020 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 153,800,000	$ 153,800,000		$ 625,000,000
Senior notes, interest rate	10.50%	10.50%		10.50%
Debt instrument maturity year		Dec. 01, 2020		Dec. 01, 2020
10 1/2% Senior Notes, due 2020 [Member] | Initial Public Offering [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 288,200,000	$ 288,200,000
Senior notes, interest rate	10.50%	10.50%
Debt Instrument, redemption premium		$ 38,200,000
Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Proceeds from issuance of debt		1,415,750,000	$ 657,217,000
Premium of debt instrument	$ 2,393,000	2,393,000
Write off of deferred financing fees		$ 12,135,000
Summit Materials, LLC [Member] | 6 1/8% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Senior notes, interest rate	6.125%	6.125%
Debt instrument maturity year		Jul. 15, 2023
Summit Materials, LLC [Member] | 10 1/2% Senior Notes, due 2020 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 153,800,000	$ 153,800,000		$ 625,000,000
Senior notes, interest rate	10.50%	10.50%		10.50%
Debt instrument maturity year		Dec. 01, 2020		Dec. 01, 2020
Summit Materials, LLC [Member] | 10 1/2% Senior Notes, due 2020 [Member] | Initial Public Offering [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 288,200,000	$ 288,200,000
Senior notes, interest rate	10.50%	10.50%
Debt Instrument, redemption premium		$ 38,200,000
Senior Notes [Member]
Debt Instrument [Line Items]
Refinance of existing senior secured term loan facility					$ 183,000,000
Senior Notes [Member] | Davenport Acquisition [Member]
Debt Instrument [Line Items]
Initial purchase price		370,000,000
Senior Notes [Member] | 6 1/8% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 350,000,000	$ 350,000,000
Senior notes, interest rate	6.125%	6.125%
Percentage of par value of senior notes		100.00%
Debt instrument maturity year		Jul. 15, 2023
Notes payable commencing date		Jan. 15, 2016
Senior Notes [Member] | 10 1/2% Senior Notes, due 2020 [Member]
Debt Instrument [Line Items]
Debt instrument, amount redeemed		$ 183,000,000
Charges on redemption	$ 14,100,000	45,400,000
Debt Instrument, redemption premium	18,200,000	56,400,000
Write off of deferred financing fees	2,800,000	7,500,000
Net benefit from the write-off the original issuance premium and discount	6,900,000	18,500,000
Senior Notes [Member] | 10 1/2% Senior Notes, due 2020 [Member] | Initial Public Offering [Member]
Debt Instrument [Line Items]
Debt instrument, face amount						$ 288,200,000
Senior Notes [Member] | Summit Materials And Summit Materials Finance Corp [Member] | 2020 Notes Additional [Member]
Debt Instrument [Line Items]
Debt instrument, face amount							$ 115,000,000	$ 260,000,000
Proceeds from issuance of debt		409,300,000
Premium of debt instrument	34,300,000	34,300,000
Senior Notes [Member] | Summit Materials And Summit Materials Finance Corp [Member] | Existing Secured Notes [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	250,000,000	250,000,000
Senior Notes [Member] | Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Refinance of existing senior secured term loan facility					$ 183,000,000
Senior Notes [Member] | Summit Materials, LLC [Member] | Davenport Acquisition [Member]
Debt Instrument [Line Items]
Initial purchase price		370,000,000
Senior Notes [Member] | Summit Materials, LLC [Member] | 6 1/8% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 350,000,000	$ 350,000,000
Senior notes, interest rate	6.125%	6.125%
Percentage of par value of senior notes		100.00%
Debt instrument maturity year		Jul. 15, 2023
Notes payable commencing date		Jan. 15, 2016
Senior Notes [Member] | Summit Materials, LLC [Member] | 10 1/2% Senior Notes, due 2020 [Member]
Debt Instrument [Line Items]
Debt instrument, amount redeemed		$ 183,000,000
Charges on redemption	$ 14,100,000	45,400,000
Debt Instrument, redemption premium	18,200,000	56,400,000
Write off of deferred financing fees	2,800,000	7,500,000
Net benefit from the write-off the original issuance premium and discount	$ 6,900,000	$ 18,500,000
Senior Notes [Member] | Summit Materials, LLC [Member] | 10 1/2% Senior Notes, due 2020 [Member] | Initial Public Offering [Member]
Debt Instrument [Line Items]
Debt instrument, face amount						$ 288,200,000

XML

Guarantor and Non-Guarantor Financial Information - Schedule of Condensed Consolidating Statements of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 26, 2015	Sep. 26, 2015	Sep. 27, 2014
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities		$ (18,927)	$ (10,836)
Cash flow from investing activities:
Acquisitions, net of cash acquired		(505,466)	(351,941)
Purchase of property, plant and equipment		(69,672)	(64,244)
Proceeds from the sale of property, plant, and equipment		8,883	9,575
Other		610	757
Net cash (used for) provided by investing activities		(565,645)	(405,853)
Cash flow from financing activities:
Capital issuance costs		(61,218)
Net proceeds from debt issuance		1,415,750	657,217
Payments on long-term debt		(1,251,407)	(258,337)
Payments on acquisition-related liabilities		(15,018)	(5,807)
Financing costs		(10,911)	(8,834)
Distributions from partnership	$ (14,600)	(26,448)
Other			(88)
Net cash provided by (used for) financing activities		590,344	408,501
Net increase (decrease) in cash		5,772	(8,188)
Cash - beginning of period		13,215	18,184
Cash - end of period	18,987	18,987	9,996
Summit Materials, LLC [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities		(18,927)	(10,836)
Cash flow from investing activities:
Acquisitions, net of cash acquired		(505,466)	(351,941)
Purchase of property, plant and equipment		(69,672)	(64,244)
Proceeds from the sale of property, plant, and equipment		8,883	9,575
Other		610	757
Net cash (used for) provided by investing activities		(565,645)	(405,853)
Cash flow from financing activities:
Proceeds from investment by member		490,916	24,350
Capital issuance costs		(12,539)
Net proceeds from debt issuance		1,415,750	657,217
Payments on long-term debt		(1,251,407)	(258,337)
Payments on acquisition-related liabilities		(15,018)	(5,807)
Financing costs		(10,911)	(8,834)
Distributions from partnership	(14,600)	(39,952)
Other			(88)
Net cash provided by (used for) financing activities		576,839	408,501
Net increase (decrease) in cash		(7,733)	(8,188)
Cash - beginning of period		13,215	14,917
Cash - end of period	5,482	5,482	6,729
Summit Materials, LLC [Member] | Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities		(167)	(1,319)
Cash flow from investing activities:
Other			1,166
Net cash (used for) provided by investing activities			1,166
Cash flow from financing activities:
Proceeds from investment by member			(1,353)
Loans received from and payments made on loans from other Summit Companies		(6,439)	(7,923)
Payments on long-term debt		1,056
Other			1,500
Net cash provided by (used for) financing activities		(5,383)	(7,776)
Net increase (decrease) in cash		(5,550)	(7,929)
Cash - beginning of period		(7,112)	(2,540)
Cash - end of period	(12,662)	(12,662)	(10,469)
Summit Materials, LLC [Member] | Issuers [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities		(140,504)	(36,504)
Cash flow from investing activities:
Acquisitions, net of cash acquired			(181,754)
Purchase of property, plant and equipment		(3,743)	(3,674)
Net cash (used for) provided by investing activities		(3,743)	(185,428)
Cash flow from financing activities:
Proceeds from investment by member		490,916	24,350
Capital issuance costs		(12,539)
Net proceeds from debt issuance		1,415,750	657,217
Loans received from and payments made on loans from other Summit Companies		(1,031,576)	(195,590)
Payments on long-term debt		(669,123)	(251,062)
Payments on acquisition-related liabilities		(166)	(1,500)
Financing costs		(10,911)	(8,834)
Distributions from partnership		(39,952)
Other			(88)
Net cash provided by (used for) financing activities		142,399	224,493
Net increase (decrease) in cash		(1,848)	2,561
Cash - beginning of period		10,837	10,375
Cash - end of period	8,989	8,989	12,936
Summit Materials, LLC [Member] | Non Wholly Owned Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities			(2,408)
Cash flow from investing activities:
Purchase of property, plant and equipment			(13,472)
Net cash (used for) provided by investing activities			(13,472)
Cash flow from financing activities:
Loans received from and payments made on loans from other Summit Companies			16,383
Payments on long-term debt			(509)
Net cash provided by (used for) financing activities			15,874
Net increase (decrease) in cash			(6)
Cash - beginning of period			9
Cash - end of period			3
Summit Materials, LLC [Member] | Wholly Owned Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities		112,541	28,727
Cash flow from investing activities:
Acquisitions, net of cash acquired		(505,466)	(170,187)
Purchase of property, plant and equipment		(65,001)	(46,575)
Proceeds from the sale of property, plant, and equipment		8,821	9,345
Other		610	(409)
Net cash (used for) provided by investing activities		(561,036)	(207,826)
Cash flow from financing activities:
Loans received from and payments made on loans from other Summit Companies		1,047,015	189,243
Payments on long-term debt		(583,340)	(6,766)
Payments on acquisition-related liabilities		(14,852)	(4,307)
Other			(1,500)
Net cash provided by (used for) financing activities		448,823	176,670
Net increase (decrease) in cash		328	(2,429)
Cash - beginning of period		697	3,442
Cash - end of period	1,025	1,025	1,013
Summit Materials, LLC [Member] | Non Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities		9,203	668
Cash flow from investing activities:
Purchase of property, plant and equipment		(928)	(523)
Proceeds from the sale of property, plant, and equipment		62	230
Net cash (used for) provided by investing activities		(866)	(293)
Cash flow from financing activities:
Proceeds from investment by member			1,353
Loans received from and payments made on loans from other Summit Companies		(9,000)	(2,113)
Net cash provided by (used for) financing activities		(9,000)	(760)
Net increase (decrease) in cash		(663)	(385)
Cash - beginning of period		8,793	3,631
Cash - end of period	8,130	8,130	$ 3,246
Summit Materials, LLC [Member] | Wholly and Non Wholly Owned Guarantor [Member]
Cash flow from financing activities:
Net increase (decrease) in cash		328
Cash - beginning of period		697
Cash - end of period	$ 1,025	$ 1,025

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Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014
Cash payments:
Interest	$ 75,990	$ 59,179
Income taxes	1,516	1,345
Non cash financing activities:
Purchase of noncontrolling interest in Continental Cement	(29,102)
Summit Materials, LLC [Member]
Cash payments:
Interest	75,990	59,179
Income taxes	1,516	$ 1,345
Non cash financing activities:
Purchase of noncontrolling interest in Continental Cement	$ (64,102)

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Inventories - Components of Inventories (Detail) - USD ($) $ in Thousands	Sep. 26, 2015	Dec. 27, 2014
Inventory [Line Items]
Aggregate stockpiles	$ 90,776	$ 88,211
Finished goods	11,284	8,826
Work in process	6,511	1,801
Raw materials	29,465	12,715
Total	138,036	111,553
Summit Materials, LLC [Member]
Inventory [Line Items]
Aggregate stockpiles	90,776	88,211
Finished goods	11,284	8,826
Work in process	6,511	1,801
Raw materials	29,465	12,715
Total	$ 138,036	$ 111,553

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Reorganization

9 Months Ended

Sep. 26, 2015

Reorganization

2. REORGANIZATION

Prior to the IPO and Reorganization, the capital structure of Summit Holdings consisted of six different classes of limited partnership interests (Class A-1, Class A-2, Class B-1, Class C, Class D-1 and Class D-2), each of which was subject to unique distribution rights. There were no outstanding Class A-2 interests. In connection with the IPO and the Reorganization, the limited partnership agreement of Summit Holdings was amended and restated to, among other things, modify its capital structure by creating the LP Units, referred to as the “Reclassification.” Immediately following the Reclassification, 69,007,297 LP Units were outstanding. In addition, in substitution for part of the economic benefit of the Class C and Class D interests that was not reflected in the conversion of such interests to LP Units, warrants were issued to holders of Class C interests to purchase an aggregate of 160,333 shares of Class A common stock, and options were issued to holders of Class D interests to purchase an aggregate of 4,358,842 shares of Class A common stock (“leverage restoration options”). The exercise price of the warrants and leverage restoration options is the IPO price of $18.00 per share. In conjunction with the Reclassification of the equity-based awards, the Company recognized a $14.5 million modification charge in general and administrative costs.

The leverage restoration options were granted under the Summit Materials, Inc. 2015 Omnibus Incentive Plan (the “Omnibus Incentive Plan”). The leverage restoration options that correlate to time-vesting interests vest over four years, beginning on the Reclassification date and the leverage restoration options that correlate to performance-vesting interests vest only when both the relevant return multiple is achieved and a four year time-vesting condition is satisfied. The time-based vesting condition for both the time-vesting and performance-vesting interests will be satisfied with respect to 25% of the performance-vesting options on each of the first four anniversaries of the Reclassification date, subject to the employee’s continued employment through the applicable vesting date.

The Company also granted 240,000 options to purchase shares of Class A common stock under the Omnibus Incentive Plan to certain employees some of whom had not previously been granted equity-based interests. These stock options have an exercise price of $18.00 per share, the IPO price, and are subject to a time-based vesting condition that will be satisfied with respect to 25% of the award on each of the first four anniversaries of the grant date, subject to the employee’s continued employment through the applicable vesting date.

Summit Materials, LLC [Member]

Reorganization

2. REORGANIZATION

Prior to the IPO and Reorganization, the capital structure of Summit Holdings consisted of six different classes of limited partnership interests (Class A-1, Class A-2, Class B-1, Class C, Class D-1 and Class D-2), each of which was subject to unique distribution rights. There were no outstanding Class A-2 interests. In connection with the IPO and the Reorganization, the limited partnership agreement of Summit Holdings was amended and restated to, among other things, modify its capital structure by creating a single new class of units (the “LP Units”), referred to as the “Reclassification.” Immediately following the Reclassification, 69,007,297 LP Units were outstanding. In addition, in substitution for part of the economic benefit of the Class C and Class D interests that was not reflected in the conversion of such interests to LP Units, warrants were issued to holders of Class C interests to purchase an aggregate of 160,333 shares of Summit Inc.’s Class A common stock, and options were issued to holders of Class D interests to purchase an aggregate of 4,358,842 shares of Summit Inc.’s Class A common stock (“leverage restoration options”). The exercise price of the warrants and leverage restoration options is the IPO price of $18.00 per share. In conjunction with the Reclassification of the equity-based awards, the Company recognized a $14.5 million modification charge in general and administrative costs.

The leverage restoration options were granted under the Summit Materials, Inc. 2015 Omnibus Incentive Plan (the “Omnibus Incentive Plan”). The leverage restoration options that correlate to time-vesting interests vest over four years, beginning on the Reclassification date and the leverage restoration options that correlate to performance-vesting interests vest only when both the relevant return multiple is achieved and a four year time-vesting condition is satisfied. The time-based vesting condition for both the time-vesting and performance-vesting interests will be satisfied with respect to 25% of the performance-vesting options on each of the first four anniversaries of the Reclassification date, subject to the employee’s continued employment through the applicable vesting date.

The Company also granted 240,000 options to purchase shares of Summit Inc.’s Class A common stock under the Omnibus Incentive Plan to certain employees some of whom had not previously been granted equity-based interests. These stock options have an exercise price of $18.00 per share, the IPO price, and are subject to a time-based vesting condition that will be satisfied with respect to 25% of the award on each of the first four anniversaries of the grant date, subject to the employee’s continued employment through the applicable vesting date.

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Segment Information - Additional Information (Detail)	9 Months Ended
	Sep. 26, 2015 Segment
Segment Reporting Information [Line Items]
Number of operating segments	3
Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Number of operating segments	3

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Acquisitions - Summary of Proforma Information (Detail) - Davenport Acquisition [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 26, 2015	Sep. 26, 2015
Business Acquisition [Line Items]
Revenue	$ 477,706	$ 1,069,305
Net income	27,649	26,764
Summit Materials, LLC [Member]
Business Acquisition [Line Items]
Revenue	477,706	1,069,305
Net income	$ 67,229	$ 24,506

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Inventories (Tables)

9 Months Ended

Sep. 26, 2015

Components of Inventories

Inventories consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,		December 27,
	2015		2014
Aggregate stockpiles	$	90,776	$	88,211
Finished goods		11,284		8,826
Work in process		6,511		1,801
Raw materials		29,465		12,715
Total	$	138,036	$	111,553

Summit Materials, LLC [Member]

Components of Inventories

Inventories consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,		December 27,
	2015		2014
Aggregate stockpiles	$	90,776	$	88,211
Finished goods		11,284		8,826
Work in process		6,511		1,801
Raw materials		29,465		12,715
Total	$	138,036	$	111,553

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Accounts Receivable, Net (Tables)

9 Months Ended

Sep. 26, 2015

Summary of Accounts Receivable, Net

Accounts receivable, net consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26, 2015			December 27, 2014
Trade accounts receivable	$	194,235		$	131,060
Retention receivables		13,396			12,053
Receivables from related parties		705			333
Accounts receivable		208,336			143,446
Less: Allowance for doubtful accounts		(2,397	)		(2,144	)
Accounts receivable, net	$	205,939		$	141,302

Summit Materials, LLC [Member]

Summary of Accounts Receivable, Net

Accounts receivable, net consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,			December 27,
	2015			2014
Trade accounts receivable	$	194,235		$	131,060
Retention receivables		13,396			12,053
Receivables from related parties		705			333
Accounts receivable		208,336			143,446
Less: Allowance for doubtful accounts		(2,397	)		(2,144	)
Accounts receivable, net	$	205,939		$	141,302

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Accumulated Other Comprehensive Loss - Summary of Changes in Each Component of Accumulated Comprehensive Income Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Postretirement adjustment				$ 2,164
Foreign currency translation adjustment	$ (6,296)	$ (1,764)	$ (11,531)	(1,764)
Loss on cash flow hedges	(1,010)		(1,010)
Ending balance	(2,607)		(2,607)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment			(2,109)
Ending balance	(2,109)		(2,109)
Cash Flow Hedge Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Loss on cash flow hedges			(498)
Ending balance	(498)		(498)
Accumulated Other Comprehensive Loss (AOCI) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment			(2,109)
Loss on cash flow hedges			(498)
Ending balance	(2,607)		(2,607)
Summit Materials, LLC [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(15,546)
Postretirement adjustment				2,164
Foreign currency translation adjustment	(6,296)	(1,764)	(11,531)	(1,764)
Loss on cash flow hedges	(1,010)		(1,010)
Ending balance	(28,087)		(28,087)
Summit Materials, LLC [Member] | Pension And Postretirement Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(9,730)	(6,045)
Ending balance	(9,730)	(5,472)	(9,730)	(5,472)
Summit Materials, LLC [Member] | Pension And Postretirement Plans [Member] | Postretirement Curtailment Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Postretirement adjustment				(942)
Summit Materials, LLC [Member] | Pension And Postretirement Plans [Member] | Postretirement Liability Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Postretirement adjustment				1,515
Summit Materials, LLC [Member] | Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(5,816)
Foreign currency translation adjustment			(11,531)	(1,764)
Ending balance	(17,347)	(1,764)	(17,347)	(1,764)
Summit Materials, LLC [Member] | Cash Flow Hedge Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Loss on cash flow hedges			(1,010)
Ending balance	(1,010)		(1,010)
Summit Materials, LLC [Member] | Accumulated Other Comprehensive Loss (AOCI) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(15,546)	(6,045)
Foreign currency translation adjustment			(11,531)	(1,764)
Loss on cash flow hedges			(1,010)
Ending balance	$ (28,087)	$ (7,236)	$ (28,087)	(7,236)
Summit Materials, LLC [Member] | Accumulated Other Comprehensive Loss (AOCI) [Member] | Postretirement Curtailment Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Postretirement adjustment				(942)
Summit Materials, LLC [Member] | Accumulated Other Comprehensive Loss (AOCI) [Member] | Postretirement Liability Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Postretirement adjustment				$ 1,515

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Acquisitions - Summary of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Sep. 26, 2015	Jul. 17, 2015	Dec. 27, 2014
Business Acquisition [Line Items]
Goodwill	$ 567,836		$ 419,270
Summit Materials, LLC [Member]
Business Acquisition [Line Items]
Goodwill	567,836		$ 419,270
Davenport Acquisition [Member]
Business Acquisition [Line Items]
Inventories	21,538
Property, plant and equipment	272,815
Other assets	6,537
Financial liabilities	(1,509)
Other long-term liabilities	(95)
Net assets acquired	299,286
Goodwill	150,710
Total consideration	449,996
Transfer of assets	(2,182)
Working capital true-up	896
Net cash paid for acquisitions	448,710	$ 448,710
Davenport Acquisition [Member] | Summit Materials, LLC [Member]
Business Acquisition [Line Items]
Inventories	21,538
Property, plant and equipment	272,815
Other assets	6,537
Financial liabilities	(1,509)
Other long-term liabilities	(95)
Net assets acquired	299,286
Goodwill	150,710
Total consideration	449,996
Transfer of assets	(2,182)
Working capital true-up	896
Net cash paid for acquisitions	$ 448,710	$ 448,710

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Accrued Expenses (Tables)

9 Months Ended

Sep. 26, 2015

Components of Accrued Expenses

Accrued expenses consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26, 2015		December 27, 2014
Interest	$	12,973	$	32,475
Payroll and benefits		22,095		20,326
Capital lease obligations		16,065		17,530
Insurance		13,710		11,402
Non-income taxes		10,221		5,520
Professional fees		1,305		3,299
Other (1)		14,511		10,944
Total	$	90,880	$	101,496
(1)    Consists primarily of subcontractor and working capital settlement accruals.

Summit Materials, LLC [Member]

Components of Accrued Expenses

Accrued expenses consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,		December 27,
	2015		2014
Interest	$	12,973	$	32,475
Payroll and benefits		22,095		20,326
Capital lease obligations		16,065		17,530
Insurance		13,710		11,402
Non-income taxes		10,221		5,520
Professional fees		1,305		3,299
Other (1)		14,511		10,944
Total	$	90,880	$	101,496

(1) Consists primarily of subcontractor and working capital settlement accruals.

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Debt (Tables)

9 Months Ended

Sep. 26, 2015

Schedule of Debt

Debt consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26, 2015		December 27, 2014
Revolving credit facility	$	60,000	$	—
Long-term debt:
10 1/2% Senior Notes, due 2020:
$153.8 million senior notes, including a $5.5 million net premium at September 26, 2015 and $625.0 million senior notes, including a $26.5 million net premium at December 27, 2014		159,365		651,548
6 1/8% Senior Notes, due 2023:
$350.0 million senior notes, issued at par at September 26, 2015		350,000
Term Loan, due 2022:
$650.0 million term loan, net of $3.1 million discount at September 26, 2015 and $415.7 million term loan, net of $2.3 million discount at December 27, 2014		646,828		413,369
Total		1,156,193		1,064,917
Current portion of long-term debt		8,125		5,275
Long-term debt	$	1,148,068	$	1,059,642

Schedule of Contractual Payments of Long-Term Debt

The contractual payments of long-term debt, including current maturities, for the five years subsequent to September 26, 2015, are as follows:

2015 (three months)	$	3,250
2016		6,500
2017		6,500
2018		4,875
2019		6,500
2020		161,925
Thereafter		964,250
Total		1,153,800
Plus: Original issue net premium		2,393
Total debt	$	1,156,193

Summary of Activity for Deferred Financing Fees

The following table presents the activity for the deferred financing fees for the nine months ended September 26, 2015 and September 27, 2014:

	Deferred financing fees
Balance — December 27, 2014	$	17,215
Loan origination fees		10,911
Amortization		(2,731	)
Write off of deferred financing fees		(12,135	)
Balance — September 26, 2015	$	13,260
Balance — December 28, 2013	$	11,485
Loan origination fees		9,281
Amortization		(2,875	)
Balance —September 27, 2014	$	17,891

Summit Materials, LLC [Member]

Schedule of Debt

Debt consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,		December 27,
	2015		2014
Revolving credit facility	$	60,000	$	—
Long-term debt:
10 1/2% Senior Notes, due 2020:
$153.8 million senior notes, including a $5.5 million net premium at September 26, 2015 and $625.0 million senior notes, including a $26.5 million net premium at December 27, 2014		159,365		651,548
6 1/8% Senior Notes, due 2023:
$350.0 million senior notes, issued at par at September 26, 2015		350,000
Term Loan, due 2022:
$650.0 million term loan, net of $3.1 million discount at September 26, 2015 and $415.7 million term loan, net of $2.3 million discount at December 27, 2014		646,828		413,369
Total		1,156,193		1,064,917
Current portion of long-term debt		8,125		5,275
Long-term debt	$	1,148,068	$	1,059,642

Schedule of Contractual Payments of Long-Term Debt

The contractual payments of long-term debt, including current maturities, for the five years subsequent to September 26, 2015, are as follows:

2015 (three months)	$	3,250
2016		6,500
2017		6,500
2018		4,875
2019		6,500
2020		161,925
Thereafter		964,250
Total		1,153,800
Plus: Original issue net premium		2,393
Total debt	$	1,156,193

Summary of Activity for Deferred Financing Fees

The following table presents the activity for the deferred financing fees for the nine months ended September 26, 2015 and September 27, 2014:

	Deferred financing fees
Balance — December 27, 2014	$	17,215
Loan origination fees		10,911
Amortization		(2,731	)
Write off of deferred financing fees		(12,135	)
Balance — September 26, 2015	$	13,260
Balance — December 28, 2013	$	11,485
Loan origination fees		9,281
Amortization		(2,875	)
Balance —September 27, 2014	$	17,891

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Summary of Organization and Significant Accounting Policies

9 Months Ended

Sep. 26, 2015

Summary of Organization and Significant Accounting Policies

1. SUMMARY OF ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES

Summit Materials, Inc. (“Summit Inc.” and, together with its subsidiaries, the “Company”) is a vertically-integrated construction materials company. The Company is engaged in the production and sale of aggregates, cement, ready-mixed concrete, asphalt paving mix and concrete products and owns and operates quarries, sand and gravel pits, two cement plants, cement distribution terminals, ready-mixed concrete plants, asphalt plants and landfill sites. It is also engaged in paving and related services. The Company is organized by geographic region and has three operating segments, which are also its reporting segments: the West; Central; and East regions.

Substantially all of the Company’s products and services are produced, consumed and performed outdoors, primarily in the spring, summer and fall. Seasonal changes and other weather-related conditions can affect the production and sales volumes of its products and delivery of services. Therefore, the financial results for any interim period are typically not indicative of the results expected for the full year. Furthermore, the Company’s sales and earnings are sensitive to national, regional and local economic conditions and to cyclical changes in construction spending, among other factors.

On September 23, 2014, Summit Inc. was formed as a Delaware corporation to be a holding company. Its sole material asset is a controlling equity interest in Summit Materials Holdings L.P. (“Summit Holdings”). Pursuant to a reorganization into a holding company structure (the “Reorganization”) consummated in connection with Summit Inc.’s March 2015 initial public offering, Summit Inc. became a holding corporation operating and controlling all of the business and affairs of Summit Holdings and its subsidiaries and, through Summit Holdings, conducts its business. Together with Summit Inc., certain investment funds affiliated with Blackstone Capital Partners V L.P. and Silverhawk Summit, L.P. (collectively, the “Sponsors”) are the primary owners of Summit Holdings.

Initial Public Offering—Summit Inc. commenced operations on March 11, 2015 upon the pricing of the initial public offering of its Class A common stock (“IPO”). Summit Inc. raised $433.0 million, net of underwriting discounts, through the issuance of 25,555,555 shares of Class A common stock at a public offering price of $18.00 per share. Summit Inc. used the offering proceeds to purchase a number of newly-issued Class A Units (“LP Units”) from Summit Holdings equal to the number of shares of Class A common stock issued to the public. Summit Inc. caused Summit Holdings to use these proceeds: (i) to redeem $288.2 million in aggregate principal amount of outstanding 10 ¹/₂% senior notes due January 31, 2020 (“2020 Notes”); (ii) to purchase 71,428,571 Class B Units of Continental Cement Company, L.L.C. (“Continental Cement”); (iii) to pay a one-time termination fee of $13.8 million primarily to affiliates of the Sponsors in connection with the termination of a transaction and management fee agreement; and (iv) for general corporate purposes. The $288.2 million redemption of 2020 Notes was completed in the second quarter of 2015 at a redemption price equal to par plus an applicable premium of $38.2 million plus $5.2 million of accrued and unpaid interest.

Follow-On Offering—On August 11, 2015, Summit Inc. raised $555.8 million, net of underwriting discounts, through the issuance of 22,425,000 shares of Class A common stock at a public offering price of $25.75 per share. Summit Inc. used these proceeds to purchase 3,750,000 newly-issued LP Units from Summit Holdings and 18,675,000 LP Units from certain of our pre-IPO owners, at a purchase price per LP Unit equal to the public offering price per share of Class A common stock, less underwriting discounts and commissions. Summit Holdings used the proceeds from the 3,750,000 newly-issued LP Units to pay the deferred purchase price of $80.0 million related to the July 17, 2015 acquisition of a cement plant and a quarry in Davenport, Iowa, and seven cement terminals along the Mississippi River (the “Davenport Assets”) and for general corporate purposes.

Basis of Presentation—These unaudited consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures typically included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The Company’s financial position as of December 27, 2014, the results of operations for the three and nine months ended September 27, 2014 and cash flows for the nine months ended September 27, 2014 reflect those of Summit Holdings. These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements of Summit Holdings and the notes thereto as of and for the year ended December 27, 2014. The Company continues to follow the accounting policies set forth in those consolidated financial statements.

Management believes that these consolidated interim financial statements include all adjustments, normal and recurring in nature, that are necessary to present fairly the financial position of the Company as of September 26, 2015, the results of operations for the three and nine months ended September 26, 2015 and September 27, 2014 and cash flows for the nine months ended September 26, 2015 and September 27, 2014. All significant intercompany balances and transactions have been eliminated.

The Company’s fiscal year is based on a 52-53 week year with each quarter composed of 13 weeks ending on a Saturday. The 53-week year occurs approximately once every seven years and will occur in 2015. The additional week in the 53-week year will be included in the fourth quarter.

The consolidated financial statements of the Company include the accounts of Summit Inc. and its subsidiaries, including noncontrolling interests. As a result of the Reorganization, Summit Holdings became a variable interest entity. Summit Inc. is the primary beneficiary of Summit Holdings as a result of its 100% voting power and control over Summit Holdings and its obligation to absorb losses and its right to receive benefits of Summit Holdings and thus consolidates Summit Holdings in its consolidated financial statements with a corresponding noncontrolling interest elimination of 72.2% between March 11, 2015 and August 11, 2015 and 50.7% between August 8, 2015 and September 26, 2015. Summit Inc.’s August 2015 purchase of 22,425,000 LP Units, 18,675,000 of which were previously held by certain of our pre-IPO owners, decreased the noncontrolling interest’s economic interest from 72.2% to 50.7%.

Noncontrolling interests in consolidated subsidiaries represent a 20% ownership in Ohio Valley Asphalt, LLC and, prior to the IPO and concurrent purchase of the noncontrolling interests of Continental Cement, a 30% redeemable ownership in Continental Cement.

Use of Estimates—Preparation of these consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities and reported amounts of revenue and expenses. Such estimates include the valuation of accounts receivable, inventories, goodwill, intangibles and other long-lived assets, pension and other postretirement obligations and asset retirement obligations. Estimates also include revenue earned on contracts and costs to complete contracts. Most of the Company’s paving and related services are performed under fixed unit-price contracts with state and local governmental entities. Management regularly evaluates its estimates and assumptions based on historical experience and other factors, including the current economic environment. Management adjusts such estimates and assumptions when circumstances dictate. As future events and their effects cannot be determined with precision, actual results can differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, are reflected in the Company’s consolidated financial statements when the change in estimate occurs.

Business and Credit Concentrations—The Company’s operations are conducted primarily across 18 U.S. states and in British Columbia, Canada, with the most significant revenue generated in Texas, Kansas, Kentucky, Utah and Missouri. The Company’s accounts receivable consist primarily of amounts due from customers within these areas. Therefore, collection of these accounts is dependent on the economic conditions in the aforementioned states, as well as specific situations affecting individual customers. Credit granted within the Company’s trade areas has been granted to many customers, and management does not believe that a significant concentration of credit exists with respect to any individual customer or group of customers. No single customer accounted for more than 10% of the Company’s total revenue in the three and nine months ended September 26, 2015 and September 27, 2014.

Earnings per Share—The Company computes basic earnings per share attributable to stockholders by dividing income attributable to Summit Inc. by the weighted-average shares of Class A common stock outstanding. Diluted earnings per share reflects the potential dilution beyond shares for basic earnings per share that could occur if securities or other contracts to issue common stock were exercised, converted into common stock, or resulted in the issuance of common stock that would have shared in the Company’s earnings. Since the Class B common stock has no economic value, those shares are not included in the weighted-average common share amount for basic or diluted earnings per share. In addition, as the shares of Class A common stock are issued by Summit Inc., the earnings and equity interests of noncontrolling interests are not included in basic or diluted earnings per share.

Fair Value Measurements—Certain acquisitions made by the Company require the payment of contingent amounts of purchase consideration. These payments are contingent on specified operating results being achieved in periods subsequent to the acquisition and will only be made if earn-out thresholds are achieved. Contingent consideration obligations are measured at fair value each reporting period. Any adjustments to fair value are recognized in earnings in the period identified. In the third quarter of 2015, the Company entered into interest rate derivatives on $200.0 million of its term loan borrowings to add stability to interest expense and to manage its exposure to interest rate movements. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive loss and will be subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The fair value of contingent consideration and derivatives as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015		December 27, 2014
Current portion of derivatives and acquisition-related liabilities:
Contingent consideration	$	4,559	$	2,375
Cash flow hedge		114
Derivatives and acquisition- related liabilities:
Contingent consideration	$	2,711	$	5,379
Cash flow hedge		897

The fair value of contingent consideration was based on unobservable, or Level 3, inputs, including projected probability-weighted cash payments and an 11.0% discount rate, which reflects a market discount rate. Changes in fair value may occur as a result of a change in actual or projected cash payments, the probability weightings applied by the Company to projected payments or a change in the discount rate. Significant increases or decreases in any of these inputs in isolation could result in a lower, or higher, fair value measurement. The fair value of the derivatives are based on observable, or Level 2, inputs such as interest rates, bond yields and prices in inactive markets. There were no material valuation adjustments in the three or nine months ended September 26, 2015 or September 27, 2014.

Financial Instruments—The Company’s financial instruments include debt and certain acquisition-related liabilities (deferred consideration and noncompete obligations). The carrying value and fair value of these financial instruments as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015				December 27, 2014
	Fair Value		Carrying Value		Fair Value		Carrying Value
Level 2
Long-term debt(1)	$	1,155,557	$	1,156,193	$	1,101,873	$	1,064,917
Level 3
Current portion of deferred consideration and noncompete obligations(2)		15,632		15,632		16,027		16,027
Long term portion of deferred consideration and noncompete obligations(3)		39,267		39,267		37,357		37,357

(1) $8.1 million and $5.3 million included in current portion of debt as of September 26, 2015 and December 27, 2014, respectively. Excludes $60.0 million outstanding on the revolving credit facility as of September 26, 2015.

(2) Included in current portion of acquisition-related liabilities on the balance sheet.

(3) Included in acquisition-related liabilities on the balance sheet.

The fair value of debt was determined based on observable, or Level 2, inputs, such as interest rates, bond yields and quoted prices in inactive markets. The fair values of the deferred consideration and noncompete obligations were determined based on unobservable, or Level 3, inputs, including the cash payment terms in the purchase agreements and a discount rate reflecting the Company’s credit risk.

Redeemable Noncontrolling Interest — On March 17, 2015, upon the consummation of the IPO and the transactions contemplated by a contribution and purchase agreement entered into with the holders of all of the outstanding Class B Units of Continental Cement, Continental Cement became a wholly-owned indirect subsidiary of Summit Inc. The noncontrolling interests of Continental Cement were acquired for aggregate consideration of $64.1 million, consisting of $35.0 million of cash, 1,029,183 shares of Summit Inc.’s Class A common stock and $15.0 million aggregate principal amount of non-interest bearing notes payable in six annual installments of $2.5 million, beginning on March 17, 2016.

New Accounting Standards — In April 2015, the FASB issued Accounting Standards Update (“ASU”) 2015-03, Simplifying the Presentation of Debt Issuance Costs, which changes the presentation of debt issuance costs in financial statements. Under the ASU, an entity will present such costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the costs will continue to be reported as interest expense. The ASU is effective for public entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The guidance will be applied retrospectively to all prior periods (i.e., the balance sheet for each period will be adjusted). Had the Company adopted this guidance as of the current period, both Other Assets (noncurrent) and Long-term Debt as of September 26, 2015 and December 27, 2014, would have decreased by $8.8 million and $16.8 million, respectively.

In April 2015, the FASB issued a new accounting standard, ASU 2015-04, Practical Expedient for the Measurement Date of an Employer’s Defined Benefit Obligation and Plan Assets, which gives an employer whose fiscal year-end does not coincide with a calendar month-end (e.g., an entity that has a 52- or 53-week fiscal year) the ability, as a practical expedient, to measure defined benefit retirement obligations and related plan assets as of the month-end that is closest to its fiscal year-end. The ASU is effective for public business entities for financial statements issued for fiscal years beginning after December 31, 2015, and interim periods within those fiscal years. Early application is permitted, and the ASU should be applied prospectively. The Company does not expect the adoption of this ASU to have a material effect on its financial position or results of operations.

In May 2014, the FASB issued a new accounting standard to improve and converge the financial reporting requirements for revenue from contracts with customers. ASU No. 2014-09, Revenue from Contracts with Customers, prescribes a five-step model for revenue recognition that will replace most existing revenue recognition guidance in U.S. GAAP. The ASU will supersede nearly all existing revenue recognition guidance under U.S. GAAP and provides that an entity recognize revenue when it transfers 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 update also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments, and assets recognized from costs incurred to obtain or fulfill a contract. ASU No. 2014-09 allows for either full retrospective or modified retrospective adoption. In July 2015, the FASB postponed the effective date of the new revenue standard by one year to the first quarter of 2018. Early adoption is permitted, but no earlier than 2017. Management is currently assessing the effect that the adoption of this standard will have on the consolidated financial statements.

Reclassifications — Certain amounts in the prior year have been reclassified to conform to the to the current period’s presentation.

Summit Materials, LLC [Member]

Summary of Organization and Significant Accounting Policies

1. SUMMARY OF ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES

Summit Materials, LLC (“Summit LLC” and, together with its subsidiaries, the “Company”) is a vertically integrated, construction materials company. The Company is engaged in the production and sale of aggregates, cement, ready-mixed concrete, asphalt paving mix and concrete products and owns and operates quarries, sand and gravel pits, two cement plants, cement distribution terminals, ready-mixed concrete plants, asphalt plants and landfill sites. It is also engaged in paving and related services. The Company is organized by geographic region and has three operating segments, which are also its reporting segments: the West; Central; and East regions.

Substantially all of the Company’s products and services are produced, consumed and performed outdoors, primarily in the spring, summer and fall. Seasonal changes and other weather-related conditions can affect the production and sales volumes of its products and delivery of services. Therefore, the financial results for any interim period are typically not indicative of the results expected for the full year. Furthermore, the Company’s sales and earnings are sensitive to national, regional and local economic conditions and to cyclical changes in construction spending, among other factors.

Summit LLC is a wholly owned indirect subsidiary of Summit Materials Holdings L.P. (“Summit Holdings”), whose primary owners are Summit Materials, Inc. (“Summit Inc.”) and certain investment funds affiliated with Blackstone Capital Partners V L.P. and Silverhawk Summit, L.P. (collectively, the “Sponsors”). Summit Inc. was formed as a Delaware corporation on September 23, 2014 to be a holding company. Its sole material asset is a controlling equity interest in Summit Holdings. Pursuant to a reorganization into a holding company structure (the “Reorganization”) in connection with Summit Inc.’s March 2015 initial public offering, Summit Inc. became a holding corporation operating and controlling all of the business and affairs of Summit Holdings and its subsidiaries, including Summit LLC.

Initial Public Offering—Summit Inc. commenced operations on March 11, 2015 upon the pricing of the initial public offering of its Class A common stock (“IPO”). Summit Inc. raised $433.0 million, net of underwriting discounts, through the issuance of 25,555,555 shares of Class A common stock at a public offering price of $18.00 per share. Summit Inc. used the offering proceeds to purchase a number of newly-issued Class A Units (“LP Units”) from Summit Holdings equal to the number of shares of Class A common stock issued to the public. Summit Inc. caused Summit Holdings to use these proceeds: (i) to redeem $288.2 million in aggregate principal amount of outstanding 10 ¹/₂% Senior Notes due January 31, 2020 (“2020 Notes”); (ii) to purchase 71,428,571 Class B Units of Continental Cement Company, L.L.C. (“Continental Cement”); (iii) to pay a one-time termination fee of $13.8 million primarily to affiliates of the Sponsors in connection with the termination of a transaction and management fee agreement; and (iv) for general corporate purposes. The $288.2 million redemption of 2020 Notes was completed in the second quarter of 2015 at a redemption price equal to par plus an applicable premium of $38.2 million plus $5.2 million of accrued and unpaid interest.

Follow-On Offering—On August 11, 2015, Summit Inc. raised $555.8 million, net of underwriting discounts, through the issuance of 22,425,000 shares of Class A common stock at a public offering price of $25.75 per share. Summit Inc. used these proceeds to purchase 3,750,000 newly-issued LP Units from Summit Holdings and 18,675,000 LP Units from certain of our pre-IPO owners, at a purchase price per LP Unit equal to the public offering price per share of Class A common stock, less underwriting discounts and commissions. Summit Holdings used the proceeds from the 3,750,000 newly-issued LP Units to pay the deferred purchase price of $80.0 million related to the July 17, 2015 acquisition of a cement plant and a quarry in Davenport, Iowa, and seven cement terminals along the Mississippi River (the “Davenport Assets”) and for general corporate purposes.

Basis of Presentation—These unaudited consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures typically included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. These unaudited consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto as of and for the year ended December 27, 2014. The Company continues to follow the accounting policies set forth in those consolidated financial statements.

Management believes that these consolidated interim financial statements include all adjustments, normal and recurring in nature, that are necessary to present fairly the financial position of the Company as of September 26, 2015, the results of operations for the three and nine months ended September 26, 2015 and September 27, 2014 and cash flows for the nine months ended September 26, 2015 and September 27, 2014. All significant intercompany balances and transactions have been eliminated.

The Company’s fiscal year is based on a 52-53 week year with each quarter composed of 13 weeks ending on a Saturday. The 53-week year occurs approximately once every seven years and will occur in 2015. The additional week in the 53-week year will be included in the fourth quarter.

The consolidated financial statements of the Company include the accounts of Summit LLC and its subsidiaries, including noncontrolling interests. Noncontrolling interests in consolidated subsidiaries represent a 20% ownership in Ohio Valley Asphalt, LLC and, prior to the IPO and concurrent purchase of the noncontrolling interests of Continental Cement, a 30% redeemable ownership in Continental Cement.

Use of Estimates—Preparation of these consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities and reported amounts of revenue and expenses. Such estimates include the valuation of accounts receivable, inventories, goodwill, intangibles and other long-lived assets, pension and other postretirement obligations and asset retirement obligations. Estimates also include revenue earned on contracts and costs to complete contracts. Most of the Company’s paving and related services are performed under fixed unit-price contracts with state and local governmental entities. Management regularly evaluates its estimates and assumptions based on historical experience and other factors, including the current economic environment. Management adjusts such estimates and assumptions when circumstances dictate. As future events and their effects cannot be determined with precision, actual results can differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, are reflected in the Company’s consolidated financial statements when the change in estimate occurs.

Business and Credit Concentrations—The Company’s operations are conducted primarily across 18 U.S. states and in British Columbia, Canada, with the most significant revenue generated in Texas, Kansas, Kentucky, Utah and Missouri. The Company’s accounts receivable consist primarily of amounts due from customers within these areas. Therefore, collection of these accounts is dependent on the economic conditions in the aforementioned states, as well as specific situations affecting individual customers. Credit granted within the Company’s trade areas has been granted to many customers, and management does not believe that a significant concentration of credit exists with respect to any individual customer or group of customers. No single customer accounted for more than 10% of total revenue in the three and nine months ended September 26, 2015 and September 27, 2014.

Fair Value Measurements—Certain acquisitions made by the Company require the payment of contingent amounts of purchase consideration. These payments are contingent on specified operating results being achieved in periods subsequent to the acquisition and will only be made if earn-out thresholds are achieved. Contingent consideration obligations are measured at fair value each reporting period. Any adjustments to fair value are recognized in earnings in the period identified. In the third quarter of 2015, the Company entered into interest rate derivatives on $200.0 million of its term loan borrowings to add stability to interest expense and to manage its exposure to interest rate movements. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive loss and will be subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The fair value of contingent consideration and derivatives as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015		December 27, 2014
Current portion of derivatives and acquisition-related liabilities:
Contingent consideration	$	4,559	$	2,375
Cash flow hedge		114
Derivatives and acquisition- related liabilities:
Contingent consideration	$	2,711	$	5,379
Cash flow hedge		897

The fair value of contingent consideration was based on unobservable, or Level 3, inputs, including projected probability-weighted cash payments and an 11.0% discount rate, which reflects a market discount rate. Changes in fair value may occur as a result of a change in actual or projected cash payments, the probability weightings applied by the Company to projected payments or a change in the discount rate. Significant increases or decreases in any of these inputs in isolation could result in a lower, or higher, fair value measurement. The fair value of the derivatives are based on observable, or Level 2, inputs such as interest rates, bond yields and prices in inactive markets. There were no material valuation adjustments in the three or nine months ended September 26, 2015 or September 27, 2014.

Financial Instruments—The Company’s financial instruments include debt and certain acquisition-related liabilities (deferred consideration and noncompete obligations). The carrying value and fair value of these financial instruments as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015				December 27, 2014
	Fair Value		Carrying Value		Fair Value		Carrying Value
Level 2
Long-term debt(1)	$	1,155,557	$	1,156,193	$	1,101,873	$	1,064,917
Level 3
Current portion of deferred consideration and noncompete obligations(2)		13,132		13,132		16,027		16,027
Long term portion of deferred consideration and noncompete obligations(3)		30,609		30,609		37,357		37,357

(1) $8.1 million and $5.3 million included in current portion of debt as of September 26, 2015 and December 27, 2014, respectively. Excludes $60.0 million outstanding on the revolving credit facility as of September 26, 2015.

(2) Included in current portion of acquisition-related liabilities on the balance sheet.

(3) Included in acquisition-related liabilities on the balance sheet.

The fair value of debt was determined based on observable, or Level 2 inputs, such as interest rates, bond yields and quoted prices in inactive markets. The fair values of the deferred consideration and noncompete obligations were determined based on unobservable, or Level 3, inputs, including the cash payment terms in the purchase agreements and a discount rate reflecting the Company’s credit risk.

Redeemable Noncontrolling Interest — On March 17, 2015, upon the consummation of the IPO and the transactions contemplated by a contribution and purchase agreement entered into with the holders of all of the outstanding Class B Units of Continental Cement, Continental Cement became a wholly-owned indirect subsidiary of Summit LLC. The noncontrolling interests of Continental Cement were acquired for aggregate consideration of $64.1 million, consisting of $35.0 million of cash, 1,029,183 shares of Summit Inc.’s Class A common stock and $15.0 million aggregate principal amount of non-interest bearing notes payable in six annual installments of $2.5 million, beginning on March 17, 2016. The notes payable is a liability of Summit Holdings and, is therefore not included in the liabilities of Summit LLC.

New Accounting Standards — In April 2015, the FASB issued Accounting Standards Update (“ASU”) 2015-03, Simplifying the Presentation of Debt Issuance Costs, which changes the presentation of debt issuance costs in financial statements. Under the ASU, an entity will present such costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the costs will continue to be reported as interest expense. The ASU is effective for public entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The guidance will be applied retrospectively to all prior periods (i.e., the balance sheet for each period will be adjusted). Had the Company adopted this guidance as of the current period, both Other Assets (noncurrent) and Long-term Debt as of September 26, 2015 and December 27, 2014, would have decreased by $8.8 million and $16.8 million, respectively.

In April 2015, the FASB issued a new accounting standard, ASU 2015-04, Practical Expedient for the Measurement Date of an Employer’s Defined Benefit Obligation and Plan Assets, which gives an employer whose fiscal year-end does not coincide with a calendar month-end (e.g., an entity that has a 52- or 53-week fiscal year) the ability, as a practical expedient, to measure defined benefit retirement obligations and related plan assets as of the month-end that is closest to its fiscal year-end. The ASU is effective for public business entities for financial statements issued for fiscal years beginning after December 31, 2015, and interim periods within those fiscal years. Early application is permitted, and the ASU should be applied prospectively. The Company does not expect the adoption of this ASU to have a material effect on its financial position or results of operations.

In May 2014, the FASB issued a new accounting standard to improve and converge the financial reporting requirements for revenue from contracts with customers. ASU No. 2014-09, Revenue from Contracts with Customers, prescribes a five-step model for revenue recognition that will replace most existing revenue recognition guidance in U.S. GAAP. The ASU will supersede nearly all existing revenue recognition guidance under U.S. GAAP and provides that an entity recognize revenue when it transfers 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 update also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and

changes in judgments, and assets recognized from costs incurred to obtain or fulfill a contract. ASU No. 2014-09 allows for either full retrospective or modified retrospective adoption. In July 2015, the FASB postponed the effective date of the new revenue standard by one year to the first quarter of 2018. Early adoption is permitted, but no earlier than 2017. Management is currently assessing the effect that the adoption of this standard will have on the consolidated financial statements.

Reclassifications — Certain amounts in the prior year have been reclassified to conform to the current period’s presentation.

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Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

Sep. 26, 2015

Accumulated Other Comprehensive Loss

The changes in each component of accumulated other comprehensive loss consisted of the following:

	Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance — December 27, 2014	$	—		$	—		$	—
Foreign currency translation adjustment		(2,109	)		—			(2,109	)
Loss on cash flow hedges		—			(498	)		(498	)
Balance — September 26, 2015	$	(2,109	)	$	(498	)	$	(2,607	)

Summit Materials, LLC [Member]

Accumulated Other Comprehensive Loss

The changes in each component of accumulated other comprehensive loss consisted of the following:

	Change in retirement plans			Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance — December 27, 2014	$	(9,730	)	$	(5,816	)	$	—		$	(15,546	)
Foreign currency translation adjustment		—			(11,531	)		—			(11,531	)
Loss on cash flow hedges		—			—			(1,010	)		(1,010	)
Balance — September 26, 2015	$	(9,730	)	$	(17,347	)	$	(1,010	)	$	(28,087	)
Balance — December 28, 2013	$	(6,045	)	$	—		$	—		$	(6,045	)
Postretirement curtailment adjustment		(942	)		—			—			(942	)
Postretirement liability adjustment		1,515			—			—			1,515
Foreign currency translation adjustment		—			(1,764	)		—			(1,764	)
Balance —September 27, 2014	$	(5,472	)	$	(1,764	)	$	—		$	(7,236	)

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Summary of Organization and Significant Accounting Policies - Schedule of Carrying Value and Fair Value of Financial Instruments (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 26, 2015	Dec. 27, 2014
Debt Instrument [Line Items]
Current portion of debt	$ 8,100	$ 5,300
Remaining borrowing capacity	60,000
Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Current portion of debt	8,100	$ 5,300
Remaining borrowing capacity	60,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Remaining borrowing capacity	60,000
Revolving Credit Facility [Member] | Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Remaining borrowing capacity	$ 60,000

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Debt - Senior Secured Credit Facilities - Additional Information (Detail) - USD ($)			3 Months Ended		9 Months Ended
	Jul. 17, 2015	Mar. 17, 2015	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014	Jul. 16, 2015	Mar. 16, 2015	Mar. 11, 2015
Debt Instrument [Line Items]
Financing fees			$ (32,641,000)		$ (64,313,000)
Outstanding letters of credit			60,000,000		60,000,000
Interest expense			$ 17,800,000	$ 19,900,000	$ 54,600,000	$ 56,400,000
Senior Secured Credit Facilities [Member] | Maximum [Member]
Debt Instrument [Line Items]
First lien leverage ratio					4.751
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 235,000,000						$ 150,000,000
Revolving credit facility, maturity date		Mar. 11, 2020
Effective interest rate			3.20%		3.20%
Outstanding letters of credit			$ 60,000,000		$ 60,000,000
Revolving Credit Facility [Member] | Federal Funds Effective Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate					0.50%
Revolving Credit Facility [Member] | Libor Plus Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate					1.00%
Revolving Credit Facility [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Interest rate - Revolving credit commitments, minimum interest rate					2.00%
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate					3.00%
Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			150,600,000		$ 150,600,000
Outstanding letters of credit			24,400,000		24,400,000
Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Financing fees			(32,641,000)		(64,313,000)
Outstanding letters of credit			60,000,000		60,000,000
Interest expense			17,800,000	$ 19,900,000	54,600,000	$ 56,400,000
Summit Materials, LLC [Member] | Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			650,000,000		$ 650,000,000
Quarterly principal repayments percentage					0.25%
Frequency of periodic payment					Term debt are due on the last business day of each March, June, September and December
Maturity date					Jul. 17, 2022
Basis spread description	25 basis point
Summit Materials, LLC [Member] | Senior Secured Credit Facilities [Member] | Maximum [Member]
Debt Instrument [Line Items]
First lien leverage ratio					4.751
Summit Materials, LLC [Member] | Senior Secured Credit Facilities [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.25%
Summit Materials, LLC [Member] | Senior Secured Credit Facilities [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	3.25%
Summit Materials, LLC [Member] | Senior Secured Credit Facilities [Member] | Libor Floor Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Summit Materials, LLC [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			235,000,000		$ 235,000,000
Line of credit facility, maximum borrowing capacity		$ 235,000,000							$ 150,000,000
Revolving credit facility, maturity date		Mar. 11, 2020
Outstanding letters of credit			$ 60,000,000		$ 60,000,000
Summit Materials, LLC [Member] | Revolving Credit Facility [Member] | Federal Funds Effective Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate					0.50%
Summit Materials, LLC [Member] | Revolving Credit Facility [Member] | Libor Plus Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate					1.00%
Effective interest rate			3.60%		3.60%
Summit Materials, LLC [Member] | Revolving Credit Facility [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Interest rate - Revolving credit commitments, minimum interest rate					2.50%
Summit Materials, LLC [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate					3.50%
Summit Materials, LLC [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 150,600,000		$ 150,600,000
Outstanding letters of credit			24,400,000		24,400,000
Summit Materials, LLC [Member] | Term Loan Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			$ 650,000,000		$ 650,000,000
Summit Materials, LLC [Member] | Term Loan Facility [Member] | Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 422,000,000
Line of credit facility, maximum borrowing capacity	$ 650,000,000						$ 422,000,000

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Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 26, 2015	Dec. 27, 2014
Current assets:
Cash and cash equivalents	$ 18,987	$ 13,215
Accounts receivable, net	205,939	141,302
Costs and estimated earnings in excess of billings	34,175	10,174
Inventories	138,036	111,553
Other current assets	21,762	17,172
Total current assets	418,899	293,416
Property, plant and equipment, less accumulated depreciation, depletion and amortization (September 26, 2015 - $343,087 and December 27, 2014 - $279,375)	1,276,227	950,601
Goodwill	567,836	419,270
Intangible assets, less accumulated amortization (September 26, 2015 - $4,851 and December 27, 2014 - $3,073)	15,481	17,647
Other assets	51,798	48,843
Total assets	2,330,241	1,729,777
Current liabilities:
Current portion of debt	68,125	5,275
Current portion of acquisition-related liabilities	20,191	18,402
Accounts payable	113,226	78,854
Accrued expenses	90,880	101,496
Billings in excess of costs and estimated earnings	11,005	8,958
Total current liabilities	303,427	212,985
Long-term debt	1,148,068	1,059,642
Acquisition-related liabilities	41,978	42,736
Other noncurrent liabilities	114,575	93,691
Total liabilities	$ 1,608,048	$ 1,409,054
Commitments and contingencies
Redeemable noncontrolling interest		$ 33,740
Stockholders' Equity/Partners' Interest:
Accumulated earnings/deficit	$ 4,355
Accumulated other comprehensive loss	(2,607)
Partners' interest		285,685
Additional paid-in capital	600,204
Stockholders' equity/partners' interest:	603,132	285,685
Total liabilities, redeemable noncontrolling interest and member's interest	2,330,241	1,729,777
Total stockholders' equity/partners' interest	722,193	286,983
Common Class A [Member]
Stockholders' Equity/Partners' Interest:
Common stock	490
Total stockholders' equity/partners' interest	490
Common Class B [Member]
Stockholders' Equity/Partners' Interest:
Common stock	690
Total stockholders' equity/partners' interest	690
Summit Materials, LLC [Member]
Current assets:
Cash and cash equivalents	5,482	13,215
Accounts receivable, net	205,939	141,302
Costs and estimated earnings in excess of billings	34,175	10,174
Inventories	138,036	111,553
Other current assets	21,762	17,172
Total current assets	405,394	293,416
Property, plant and equipment, less accumulated depreciation, depletion and amortization (September 26, 2015 - $343,087 and December 27, 2014 - $279,375)	1,276,227	950,601
Goodwill	567,836	419,270
Intangible assets, less accumulated amortization (September 26, 2015 - $4,851 and December 27, 2014 - $3,073)	15,481	17,647
Other assets	51,798	48,843
Total assets	2,316,736	1,729,777
Current liabilities:
Current portion of debt	68,125	5,275
Current portion of acquisition-related liabilities	17,691	18,402
Accounts payable	113,226	78,854
Accrued expenses	90,880	101,496
Billings in excess of costs and estimated earnings	11,005	8,958
Total current liabilities	300,927	212,985
Long-term debt	1,148,068	1,059,642
Acquisition-related liabilities	33,320	42,736
Other noncurrent liabilities	114,575	93,691
Total liabilities	$ 1,596,890	$ 1,409,054
Commitments and contingencies
Redeemable noncontrolling interest		$ 33,740
Member's equity	$ 1,039,763	518,647
Stockholders' Equity/Partners' Interest:
Accumulated earnings/deficit	(293,101)	(217,416)
Accumulated other comprehensive loss	(28,087)	(15,546)
Member's interest	718,575	285,685
Noncontrolling interest	1,271	1,298
Total member's interest	719,846	286,983
Total liabilities, redeemable noncontrolling interest and member's interest	2,316,736	1,729,777
Noncontrolling interest in consolidated subsidiaries	1,271	$ 1,298
Summit Materials, INC [Member]
Stockholders' Equity/Partners' Interest:
Noncontrolling interest in Summit Materials, Inc.	$ 117,790

XML

Goodwill - Summary of Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	9 Months Ended
	Sep. 26, 2015 USD ($)
Goodwill [Line Items]
Beginning balance	$ 419,270
Acquisitions	155,508
Foreign currency translation adjustments	(6,942)
Ending balance	567,836
Summit Materials, LLC [Member]
Goodwill [Line Items]
Beginning balance	419,270
Acquisitions	155,508
Foreign currency translation adjustments	(6,942)
Ending balance	567,836
West Region [Member]
Goodwill [Line Items]
Beginning balance	297,085
Acquisitions	4,579
Foreign currency translation adjustments	(6,942)
Ending balance	294,722
West Region [Member] | Summit Materials, LLC [Member]
Goodwill [Line Items]
Beginning balance	297,085
Acquisitions	4,579
Foreign currency translation adjustments	(6,942)
Ending balance	294,722
Central Region [Member]
Goodwill [Line Items]
Beginning balance	96,025
Acquisitions	150,929
Ending balance	246,954
Central Region [Member] | Summit Materials, LLC [Member]
Goodwill [Line Items]
Beginning balance	96,025
Acquisitions	150,929
Ending balance	246,954
East Region [Member]
Goodwill [Line Items]
Beginning balance	26,160
Ending balance	26,160
East Region [Member] | Summit Materials, LLC [Member]
Goodwill [Line Items]
Beginning balance	26,160
Ending balance	$ 26,160

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014
Cash flow from operating activities:
Net loss	$ (45,932)	$ (10,750)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, depletion, amortization and accretion	90,789	68,467
Share-based compensation expense	18,589	1,746
Deferred income tax benefit		(525)
Net gain on asset disposals	(4,990)	(219)
Net gain on debt financings	(4,570)
Other	136	(463)
(Increase) decrease in operating assets, net of acquisitions:
Accounts receivable, net	(56,287)	(54,463)
Inventories	(3,830)	(3,843)
Costs and estimated earnings in excess of billings	(23,402)	(15,009)
Other current assets	(4,401)	(3,910)
Other assets	(524)	(675)
Increase (decrease) in operating liabilities, net of acquisitions:
Accounts payable	29,383	9,433
Accrued expenses	(12,272)	2,578
Billings in excess of costs and estimated earnings	(763)	270
Other liabilities	(853)	(3,473)
Net cash used in operating activities	(18,927)	(10,836)
Cash flow from investing activities:
Acquisitions, net of cash acquired	(505,466)	(351,941)
Purchases of property, plant and equipment	(69,672)	(64,244)
Proceeds from the sale of property, plant and equipment	8,883	9,575
Other	610	757
Net cash used for investing activities	(565,645)	(405,853)
Cash flow from financing activities:
Proceeds from equity offerings	1,037,444
Capital issuance costs	(61,218)
Capital contributions by partners		24,350
Proceeds from debt issuances	1,415,750	657,217
Debt issuance costs	(10,911)	(8,834)
Payments on debt	(1,251,407)	(258,337)
Purchase of noncontrolling interests	(497,848)
Payments on acquisition-related liabilities	(15,018)	(5,807)
Distributions from partnership	(26,448)
Other		(88)
Net cash provided by (used for) financing activities	590,344	408,501
Net increase (decrease) in cash	5,772	(8,188)
Cash - beginning of period	13,215	18,184
Cash - end of period	18,987	9,996
Summit Materials, LLC [Member]
Cash flow from operating activities:
Net loss	(45,350)	(10,750)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, depletion, amortization and accretion	90,207	68,467
Share-based compensation expense	18,589	1,746
Deferred income tax benefit		(525)
Net gain on asset disposals	(4,990)	(219)
Net gain on debt financings	(4,570)
Other	136	(463)
(Increase) decrease in operating assets, net of acquisitions:
Accounts receivable, net	(56,287)	(54,463)
Inventories	(3,830)	(3,843)
Costs and estimated earnings in excess of billings	(23,402)	(15,009)
Other current assets	(4,401)	(3,910)
Other assets	(524)	(675)
Increase (decrease) in operating liabilities, net of acquisitions:
Accounts payable	29,383	9,433
Accrued expenses	(12,272)	2,578
Billings in excess of costs and estimated earnings	(763)	270
Other liabilities	(853)	(3,473)
Net cash used in operating activities	(18,927)	(10,836)
Cash flow from investing activities:
Acquisitions, net of cash acquired	(505,466)	(351,941)
Purchases of property, plant and equipment	(69,672)	(64,244)
Proceeds from the sale of property, plant and equipment	8,883	9,575
Other	610	757
Net cash used for investing activities	(565,645)	(405,853)
Cash flow from financing activities:
Capital contributions by member	490,916	24,350
Capital issuance costs	(12,539)
Proceeds from debt issuances	1,415,750	657,217
Debt issuance costs	(10,911)	(8,834)
Payments on debt	(1,251,407)	(258,337)
Purchase of noncontrolling interests	(64,100)
Payments on acquisition-related liabilities	(15,018)	(5,807)
Distributions from partnership	(39,952)
Other		(88)
Net cash provided by (used for) financing activities	576,839	408,501
Net increase (decrease) in cash	(7,733)	(8,188)
Cash - beginning of period	13,215	14,917
Cash - end of period	$ 5,482	$ 6,729

XML

Net Income Per Share - Schedule of Basic to Diluted Loss Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 26, 2015	Sep. 26, 2015
Schedule Of Earnings Per Share [Line Items]
Net income attributable to Summit Inc.	$ 14,711	$ 4,355
Basic earnings per share	$ 0.39	$ 0.14
Add: Warrants	43,478	42,909
Weighted average dilutive shares	37,963,930	31,811,315
Diluted earnings per share	$ 0.39	$ 0.14
Common Class A [Member]
Schedule Of Earnings Per Share [Line Items]
Weighted average shares of Class A shares	37,920,452	31,768,406
Basic earnings per share	$ 0.39	$ 0.14
Weighted average shares of Class A shares	37,920,452	31,768,406
Weighted average dilutive shares	37,963,930	31,811,315
Diluted earnings per share	$ 0.39	$ 0.14

XML

Segment Information (Tables)

9 Months Ended

Sep. 26, 2015

Summary of Financial Data for Company's Reportable Business Segments

The following tables display selected financial data for the Company’s reportable segments:

	Three months ended				Nine months ended
	September 26, 2015		September 27, 2014		September 26, 2015		September 27, 2014
Revenue:
West region	$	261,742	$	211,302	$	597,484	$	478,432
Central region		164,084		126,882		338,613		283,541
East region		46,079		56,575		94,738		108,172
Total revenue	$	471,905	$	394,759	$	1,030,835	$	870,145

	Three months ended						Nine months ended
	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
Adjusted EBITDA
West region	$	59,574		$	39,105		$	110,940		$	71,646
Central region		53,756			30,820			89,984			59,220
East region		13,383			11,868			15,096			10,462
Corporate and other		(8,879	)		(9,381	)		(33,577	)		(28,427	)
Total reportable segments and corporate		117,834			72,412			182,443			112,901
Interest expense		20,727			22,085			62,231			62,555
Depreciation, depletion, amortization and accretion		33,306			23,255			86,818			63,950
Initial public offering costs		—			—			28,296			—
Loss on debt financings		32,641			—			64,313			—
Income (loss) from continuing operations before taxes	$	31,160		$	27,072		$	(59,215	)	$	(13,604	)

	Nine months ended
	September 26, 2015		September 27, 2014
Cash paid for capital expenditures:
West region	$	32,192	$	25,496
Central region		24,335		28,485
East region		9,401		6,590
Total reportable segments		65,928		60,571
Corporate and other		3,744		3,673
Total capital expenditures	$	69,672	$	64,244

	Three months ended				Nine months ended
	September 26, 2015		September 27, 2014		September 26, 2015		September 27, 2014
Depreciation, depletion, amortization and accretion:
West region	$	13,786	$	9,155	$	38,508	$	23,569
Central region		15,778		9,710		37,198		28,061
East region		3,114		3,984		9,426		11,272
Total reportable segments		32,678		22,849		85,132		62,902
Corporate and other		628		406		1,686		1,048
Total depreciation, depletion, amortization and accretion	$	33,306	$	23,255	$	86,818	$	63,950

	September 26, 2015		December 27, 2014
Total assets:
West region	$	866,516	$	777,981
Central region		1,189,565		704,134
East region		224,720		221,598
Total reportable segments		2,280,801		1,703,713
Corporate and other		49,440		26,064
Total	$	2,330,241	$	1,729,777

	Three months ended						Nine months ended
	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
Revenue by product:*
Aggregates	$	86,070		$	68,636		$	218,336		$	160,002
Cement		68,481			34,171			110,477			69,435
Ready-mixed concrete		95,481			75,429			254,878			189,198
Asphalt		113,249			104,862			219,492			203,944
Paving and related services		185,092			191,157			366,321			391,925
Other		(76,468	)		(79,496	)		(138,669	)		(144,359	)
Total revenue	$	471,905		$	394,759		$	1,030,835		$	870,145

* Revenue by product includes intercompany and intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other. Revenue from the liquid asphalt terminals is included in asphalt revenue.

Summit Materials, LLC [Member]

Summary of Financial Data for Company's Reportable Business Segments

The following tables display selected financial data for the Company’s reportable segments:

	Three months ended				Nine months ended
	September 26,		September 27,		September 26,		September 27,
	2015		2014		2015		2014
Revenue:
West region	$	261,742	$	211,302	$	597,484	$	478,432
Central region		164,084		126,882		338,613		283,541
East region		46,079		56,575		94,738		108,172
Total revenue	$	471,905	$	394,759	$	1,030,835	$	870,145

	Three months ended						Nine months ended
	September 26,			September 27,			September 26,			September 27,
	2015			2014			2015			2014
Adjusted EBITDA
West region	$	59,574		$	39,105		$	110,940		$	71,646
Central region		53,756			30,820			89,984			59,220
East region		13,383			11,868			15,096			10,462
Corporate and other		(8,879	)		(9,381	)		(33,577	)		(28,427	)
Total reportable segments and corporate		117,834			72,412			182,443			112,901
Interest expense		20,436			22,085			61,649			62,555
Depreciation, depletion, amortization and accretion		33,306			23,255			86,818			63,950
Initial public offering costs		—			—			28,296			—
Loss on debt financings		32,641			—			64,313			—
Income (loss) from continuing operations before taxes	$	31,451		$	27,072		$	(58,633	)	$	(13,604	)

	Nine months ended
	September 26,		September 27,
	2015		2014
Cash paid for capital expenditures:
West region	$	32,192	$	25,496
Central region		24,335		28,485
East region		9,401		6,590
Total reportable segments		65,928		60,571
Corporate and other		3,744		3,673
Total capital expenditures	$	69,672	$	64,244

	Three months ended				Nine months ended
	September 26,		September 27,		September 26,		September 27,
	2015		2014		2015		2014
Depreciation, depletion, amortization and accretion:
West region	$	13,786	$	9,155	$	38,508	$	23,569
Central region		15,778		9,710		37,198		28,061
East region		3,114		3,984		9,426		11,272
Total reportable segments		32,678		22,849		85,132		62,902
Corporate and other		628		406		1,686		1,048
Total depreciation, depletion, amortization and accretion	$	33,306	$	23,255	$	86,818	$	63,950

	September 26,		December 27,
	2015		2014
Total assets:
West region	$	866,516	$	777,981
Central region		1,189,565		704,134
East region		224,720		221,598
Total reportable segments		2,280,801		1,703,713
Corporate and other		35,935		26,064
Total	$	2,316,736	$	1,729,777

	Three months ended						Nine months ended
	September 26,			September 27,			September 26,			September 27,
	2015			2014			2015			2014
Revenue by product:*
Aggregates	$	86,070		$	68,636		$	218,336		$	160,002
Cement		68,481			34,171			110,477			69,435
Ready-mixed concrete		95,481			75,429			254,878			189,198
Asphalt		113,249			104,862			219,492			203,944
Paving and related services		185,092			191,157			366,321			391,925
Other		(76,468	)		(79,496	)		(138,669	)		(144,359	)
Total revenue	$	471,905		$	394,759		$	1,030,835		$	870,145

* Revenue by product includes intercompany and intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other. Revenue from the liquid asphalt terminals is included in asphalt revenue.

XML

Guarantor and Non-Guarantor Financial Information - Schedule of Condensed Consolidating Balance Sheets (Detail) - USD ($) $ in Thousands	Sep. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Current assets:
Cash and cash equivalents	$ 18,987	$ 13,215
Accounts receivable, net	205,939	141,302
Cost and estimated earnings in excess of billings	34,175	10,174
Inventories	138,036	111,553
Other current assets	21,762	17,172
Total current assets	418,899	293,416
Property, plant and equipment, net	1,276,227	950,601
Goodwill	567,836	419,270
Intangible assets, net	15,481	17,647
Other assets	51,798	48,843
Total assets	2,330,241	1,729,777
Current liabilities:
Current portion of debt	68,125	5,275
Current portion of acquisition-related liabilities	20,191	18,402
Accounts payable	113,226	78,854
Accrued expenses	90,880	101,496
Billings in excess of costs and estimated earnings	11,005	8,958
Total current liabilities	303,427	212,985
Long-term debt	1,148,068	1,059,642
Acquisition-related liabilities	41,978	42,736
Other noncurrent liabilities	114,575	93,691
Total liabilities	1,608,048	1,409,054
Redeemable noncontrolling interest		33,740	$ 286,817
Total liabilities, redeemable noncontrolling interest and member's interest	2,330,241	1,729,777
Summit Materials, LLC [Member]
Current assets:
Cash and cash equivalents	5,482	13,215
Accounts receivable, net	205,939	141,302
Cost and estimated earnings in excess of billings	34,175	10,174
Inventories	138,036	111,553
Other current assets	21,762	17,172
Total current assets	405,394	293,416
Property, plant and equipment, net	1,276,227	950,601
Goodwill	567,836	419,270
Intangible assets, net	15,481	17,647
Other assets	51,798	48,843
Total assets	2,316,736	1,729,777
Current liabilities:
Current portion of debt	68,125	5,275
Current portion of acquisition-related liabilities	17,691	18,402
Accounts payable	113,226	78,854
Accrued expenses	90,880	101,496
Billings in excess of costs and estimated earnings	11,005	8,958
Total current liabilities	300,927	212,985
Long-term debt	1,148,068	1,059,642
Acquisition-related liabilities	33,320	42,736
Other noncurrent liabilities	114,575	93,691
Total liabilities	1,596,890	1,409,054
Redeemable noncontrolling interest		33,740
Total stockholders' equity/partners' interest	719,846	286,983
Total liabilities, redeemable noncontrolling interest and member's interest	2,316,736	1,729,777
Summit Materials, LLC [Member] | Consolidation, Eliminations [Member]
Current assets:
Cash and cash equivalents	(12,662)	(7,112)
Accounts receivable, net	(344)	(1,233)
Intercompany receivables	(1,345,915)	(415,030)
Other current assets		(1,853)
Total current assets	(1,358,921)	(425,228)
Other assets	(963,928)	(1,256,418)
Total assets	(2,322,849)	(1,681,646)
Current liabilities:
Current portion of debt		(5,263)
Accounts payable	(344)	(1,233)
Accrued expenses	(12,662)	(8,965)
Intercompany payables	(1,345,915)	(415,030)
Total current liabilities	(1,358,921)	(430,491)
Long-term debt	(61,377)	(633,917)
Other noncurrent liabilities	(55,107)	(55,107)
Total liabilities	(1,475,405)	(1,119,515)
Redeemable noncontrolling interest		33,740
Redeemable members' interest		(34,543)
Total stockholders' equity/partners' interest	(847,444)	(561,328)
Total liabilities, redeemable noncontrolling interest and member's interest	(2,322,849)	(1,681,646)
Summit Materials, LLC [Member] | Issuers [Member]
Current assets:
Cash and cash equivalents	8,989	10,837
Accounts receivable, net		1
Intercompany receivables	1,322,050	376,344
Other current assets	1,088	7,148
Total current assets	1,332,127	394,330
Property, plant and equipment, net	9,433	7,035
Other assets	881,923	1,153,204
Total assets	2,223,483	1,554,569
Current liabilities:
Current portion of debt	68,125	5,275
Current portion of acquisition-related liabilities		166
Accounts payable	7,436	3,655
Accrued expenses	30,998	37,101
Intercompany payables	67,671	162,728
Total current liabilities	174,230	208,925
Long-term debt	1,148,068	1,059,642
Other noncurrent liabilities	1,558	796
Total liabilities	1,323,856	1,269,363
Total stockholders' equity/partners' interest	899,627	285,206
Total liabilities, redeemable noncontrolling interest and member's interest	2,223,483	1,554,569
Summit Materials, LLC [Member] | Wholly Owned Guarantors [Member]
Current assets:
Cash and cash equivalents	1,025	695
Accounts receivable, net	195,120	124,380
Intercompany receivables	14,869	30,539
Cost and estimated earnings in excess of billings	33,447	9,819
Inventories	132,734	98,188
Other current assets	19,319	9,638
Total current assets	396,514	273,259
Property, plant and equipment, net	1,240,126	610,717
Goodwill	519,759	340,969
Intangible assets, net	14,044	14,245
Other assets	132,532	125,462
Total assets	2,302,975	1,364,652
Current liabilities:
Current portion of debt		3,990
Current portion of acquisition-related liabilities	17,691	18,236
Accounts payable	102,571	65,018
Accrued expenses	70,386	59,477
Intercompany payables	1,274,510	245,416
Billings in excess of costs and estimated earnings	10,983	8,931
Total current liabilities	1,476,141	401,068
Long-term debt	61,377	480,599
Acquisition-related liabilities	33,320	42,736
Other noncurrent liabilities	110,856	65,479
Total liabilities	1,681,694	989,882
Total stockholders' equity/partners' interest	621,281	374,770
Total liabilities, redeemable noncontrolling interest and member's interest	2,302,975	1,364,652
Summit Materials, LLC [Member] | Non Guarantor [Member]
Current assets:
Cash and cash equivalents	8,130	8,793
Accounts receivable, net	11,163	11,525
Intercompany receivables	8,996	4,052
Cost and estimated earnings in excess of billings	728	355
Inventories	5,302	4,669
Other current assets	1,355	1,775
Total current assets	35,674	31,169
Property, plant and equipment, net	26,668	30,325
Goodwill	48,077	55,177
Intangible assets, net	1,437	2,860
Other assets	1,271	1,362
Total assets	113,127	120,893
Current liabilities:
Accounts payable	3,563	4,569
Accrued expenses	2,158	3,705
Intercompany payables	3,734	2,834
Billings in excess of costs and estimated earnings	22	27
Total current liabilities	9,477	11,135
Other noncurrent liabilities	57,268	57,736
Total liabilities	66,745	68,871
Total stockholders' equity/partners' interest	46,382	52,022
Total liabilities, redeemable noncontrolling interest and member's interest	$ 113,127	120,893
Summit Materials, LLC [Member] | Non Wholly Owned Guarantor [Member]
Current assets:
Cash and cash equivalents		2
Accounts receivable, net		6,629
Intercompany receivables		4,095
Inventories		8,696
Other current assets		464
Total current assets		19,886
Property, plant and equipment, net		302,524
Goodwill		23,124
Intangible assets, net		542
Other assets		25,233
Total assets		371,309
Current liabilities:
Current portion of debt		1,273
Accounts payable		6,845
Accrued expenses		10,178
Intercompany payables		4,052
Total current liabilities		22,348
Long-term debt		153,318
Other noncurrent liabilities		24,787
Total liabilities		200,453
Redeemable members' interest		34,543
Total stockholders' equity/partners' interest		136,313
Total liabilities, redeemable noncontrolling interest and member's interest		$ 371,309

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Related Party Transactions

9 Months Ended

Sep. 26, 2015

Related Party Transactions

15. RELATED PARTY TRANSACTIONS

Under the terms of a transaction and management fee agreement between Summit Holdings and Blackstone Management Partners L.L.C. (“BMP”), whose affiliates include controlling stockholders of the Company, BMP provided monitoring, advisory and consulting services to the Company through March 17, 2015. Under the terms of the agreement, BMP was permitted to assign, and had assigned, a portion of the fees to which it was entitled to Silverhawk Summit, L.P. and to certain other equity investors.

The management fee was calculated based on the greater of $300,000 or 2.0% of the Company’s annual consolidated profit, as defined in the agreement, and is included in general and administrative expenses. The Company incurred management fees totaling $1.0 million during the period between December 28, 2014 and March 17, 2015 and $1.3 million and $2.3 million in the three and nine months ended September 27, 2014, respectively. During these periods, the Company paid immaterial amounts to Silverhawk Summit, L.P. and to other equity investors.

Also under the terms of the transaction and management fee agreement, BMP undertook financial and structural analysis, due diligence investigations, corporate strategy and other advisory services and negotiation assistance related to acquisitions for which the Company paid BMP transaction fees equal to 1.0% of the aggregate enterprise value of any acquired entity or, if such transaction was structured as an asset purchase or sale, 1.0% of the consideration paid for or received in respect of the assets acquired or disposed. The Company paid BMP $0.6 million and $2.3 million during the three and nine months ended September 27, 2014, respectively. During these periods, the Company paid immaterial amounts to Silverhawk Summit, L.P. and to other equity investors. The acquisition-related fees paid pursuant to this agreement are included in transaction costs.

In connection with the IPO, the transaction and management fee agreement with BMP was terminated on March 17, 2015 for a final payment of $13.8 million; $13.4 million was paid to affiliates of BMP and the remaining $0.4 million was paid to affiliates of Silverhawk Summit, L.P. and to certain other equity investors.

In addition to the transaction and management fees paid to BMP, the Company reimburses BMP for direct expenses incurred, which were not material in the three and nine months ended September 26, 2015 and September 27, 2014.

On July 17, 2015, the Company purchased the Davenport Assets from Lafarge North America Inc. for $450.0 million in cash and a cement distribution terminal in Bettendorf, Iowa. At closing, $370.0 million of the purchase price was paid, and the remaining $80.0 million was paid on August 13, 2015. Summit Holdings entered into a commitment letter dated April 16, 2015, with Blackstone Capital Partners V L.P. (“BCP”) for equity financing up to $90.0 million in the form of a preferred equity interest (the “Equity Commitment Financing”), which would have been used to pay the $80.0 million deferred purchase price if other financing was not attained by December 31, 2015. For this Equity Commitment Financing, Summit Holdings paid a $1.8 million commitment fee to BCP in the nine months ended September 26, 2015.

Blackstone Advisory Partners L.P., an affiliate of BMP, served as an initial purchaser of $5.75 million and $13.0 million principal amount of the 2020 Notes issued in September 2014 and January 2014, respectively, and received compensation in connection therewith.

Cement sales to companies owned by a former noncontrolling member of Continental Cement were approximately $1.4 million during the period between December 28, 2014 and March 11, 2015 and $4.7 million and $10.9 million during the three and nine months ended September 27, 2014, respectively. Accounts receivable due from the former noncontrolling member were $0.2 million as of December 27, 2014.

In the nine months ended September 27, 2014, the Company made an interest payment of $0.7 million to a certain former noncontrolling member of Continental Cement for a related party note. The principal balance on the note was repaid in 2012.

In the nine months ended September 27, 2014, the Company sold certain assets associated with the production of concrete blocks, including inventory and equipment, to a related party for $2.3 million.

Summit Materials, LLC [Member]

Related Party Transactions

14. RELATED PARTY TRANSACTIONS

Under the terms of a transaction and management fee agreement between Summit Holdings and Blackstone Management Partners L.L.C. (“BMP”), whose affiliates include controlling stockholders of Summit Inc., BMP provided monitoring, advisory and consulting services to the Company through March 17, 2015. Under the terms of the agreement, BMP was permitted to assign, and had assigned, a portion of the fees to which it was entitled to Silverhawk Summit, L.P. and to certain other equity investors.

The management fee was calculated based on the greater of $300,000 or 2.0% of the Company’s annual consolidated profit, as defined in the agreement, and is included in general and administrative expenses. The Company incurred management fees totaling $1.0 million during the period between December 28, 2014 and March 17, 2015 and $1.3 million and $2.3 million in the three and nine months ended September 27, 2014, respectively. During these periods, the Company paid immaterial amounts to Silverhawk Summit, L.P. and to other equity investors.

Also under the terms of the transaction and management fee agreement, BMP undertook financial and structural analysis, due diligence investigations, corporate strategy and other advisory services and negotiation assistance related to acquisitions for which the Company paid BMP transaction fees equal to 1.0% of the aggregate enterprise value of any acquired entity or, if such transaction was structured as an asset purchase or sale, 1.0% of the consideration paid for or received in respect of the assets acquired or disposed. The Company paid BMP $0.6 million and $2.3 million during the three and nine months ended September 27, 2014, respectively. During these periods, the Company paid immaterial amounts to Silverhawk Summit, L.P. and to other equity investors. The acquisition-related fees paid pursuant to this agreement are included in transaction costs.

In connection with the IPO, the transaction and management fee agreement with BMP was terminated on March 17, 2015 for a final payment of $13.8 million; $13.4 million was paid to affiliates of BMP and the remaining $0.4 million was paid to affiliates of Silverhawk Summit, L.P. and to certain other equity investors.

In addition to the transaction and management fees paid to BMP, the Company reimburses BMP for direct expenses incurred, which were not material in the three and nine months ended September 26, 2015 and September 27, 2014.

On July 17, 2015, the Company purchased the Davenport Assets from Lafarge North America Inc. for a purchase price of $450.0 million in cash and a cement distribution terminal in Bettendorf, Iowa. At closing, $370.0 million of the purchase price was paid, and the remaining $80.0 million was paid on August 13, 2015. Summit Holdings entered into a commitment letter dated April 16, 2015, with Blackstone Capital Partners V L.P. (“BCP”) for equity financing up to $90.0 million in the form of a preferred equity interest (the “Equity Commitment Financing”), which would have been used to pay the $80.0 million deferred purchase price if other financing was not attained by December 31, 2015. For the Equity Commitment Financing, the Company paid a $1.8 million commitment fee to BCP in the nine months ended September 26, 2015.

Blackstone Advisory Partners L.P., an affiliate of BMP, served as an initial purchaser of $5.75 million and $13.0 million principal amount of the 2020 Notes issued in September 2014 and January 2014, respectively, and received compensation in connection therewith.

Cement sales to companies owned by a former noncontrolling member of Continental Cement were approximately $1.4 million during the period between December 28, 2014 and March 11, 2015 and $4.7 million and $10.9 million during the three and nine months ended September 27, 2014, respectively. Accounts receivable due from the former noncontrolling member were $0.2 million as of December 27, 2014.

In the nine months ended September 27, 2014, the Company made an interest payment of $0.7 million to a certain former noncontrolling member of Continental Cement for a related party note. The principal balance on the note was repaid in 2012.

In the nine months ended September 27, 2014, the Company sold certain assets associated with the production of concrete blocks, including inventory and equipment, to a related party for $2.3 million.

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Guarantor and Non-Guarantor Financial Information (Tables) - Summit Materials, LLC [Member]

9 Months Ended

Sep. 26, 2015

Condensed Consolidating Balance Sheets

Condensed Consolidating Balance Sheets

September 26, 2015

	Issuers		Wholly- owned Guarantors		Non- Guarantors		Eliminations			Consolidated
Assets
Current assets:
Cash and cash equivalents	$	8,989	$	1,025	$	8,130	$	(12,662	)	$	5,482
Accounts receivable, net		—		195,120		11,163		(344	)		205,939
Intercompany receivables		1,322,050		14,869		8,996		(1,345,915	)		—
Cost and estimated earnings in excess of billings		—		33,447		728		—			34,175
Inventories		—		132,734		5,302		—			138,036
Other current assets		1,088		19,319		1,355		—			21,762
Total current assets		1,332,127		396,514		35,674		(1,358,921	)		405,394
Property, plant and equipment, net		9,433		1,240,126		26,668		—			1,276,227
Goodwill		—		519,759		48,077		—			567,836
Intangible assets, net		—		14,044		1,437		—			15,481
Other assets		881,923		132,532		1,271		(963,928	)		51,798
Total assets	$	2,223,483	$	2,302,975	$	113,127	$	(2,322,849	)	$	2,316,736
Liabilities, Redeemable Noncontrolling Interest and Member’s Interest
Current liabilities:
Current portion of debt	$	68,125	$	—	$	—	$	—		$	68,125
Current portion of acquisition-related liabilities		—		17,691		—		—			17,691
Accounts payable		7,436		102,571		3,563		(344	)		113,226
Accrued expenses		30,998		70,386		2,158		(12,662	)		90,880
Intercompany payables		67,671		1,274,510		3,734		(1,345,915	)		—
Billings in excess of costs and estimated earnings		—		10,983		22		—			11,005
Total current liabilities		174,230		1,476,141		9,477		(1,358,921	)		300,927
Long-term debt		1,148,068		61,377		—		(61,377	)		1,148,068
Acquisition-related liabilities		—		33,320		—		—			33,320
Other noncurrent liabilities		1,558		110,856		57,268		(55,107	)		114,575
Total liabilities		1,323,856		1,681,694		66,745		(1,475,405	)		1,596,890
Redeemable noncontrolling interest		—		—		—		—			—
Redeemable members’ interest		—		—		—		—			—
Total stockholders’ equity/partners’ interest		899,627		621,281		46,382		(847,444	)		719,846
Total liabilities, redeemable noncontrolling interest and member’s interest	$	2,223,483	$	2,302,975	$	113,127	$	(2,322,849	)	$	2,316,736

Condensed Consolidating Balance Sheets

December 27, 2014

	Issuers		Non- Wholly- owned Guarantor		Wholly- owned Guarantors		Non- Guarantors		Elim- inations			Consol- idated
Assets
Current assets:
Cash and cash equivalents	$	10,837	$	2	$	695	$	8,793	$	(7,112	)	$	13,215
Accounts receivable, net		1		6,629		124,380		11,525		(1,233	)		141,302
Intercompany receivables		376,344		4,095		30,539		4,052		(415,030	)		—
Cost and estimated earnings in excess of billings		—		—		9,819		355		—			10,174
Inventories		—		8,696		98,188		4,669		—			111,553
Other current assets		7,148		464		9,638		1,775		(1,853	)		17,172
Total current assets		394,330		19,886		273,259		31,169		(425,228	)		293,416
Property, plant and equipment, net		7,035		302,524		610,717		30,325		—			950,601
Goodwill		—		23,124		340,969		55,177		—			419,270
Intangible assets, net		—		542		14,245		2,860		—			17,647
Other assets		1,153,204		25,233		125,462		1,362		(1,256,418	)		48,843
Total assets	$	1,554,569	$	371,309	$	1,364,652	$	120,893	$	(1,681,646	)	$	1,729,777
Liabilities, Redeemable Noncontrolling Interest and Member’s Interest
Current liabilities:
Current portion of debt	$	5,275	$	1,273	$	3,990	$	—	$	(5,263	)	$	5,275
Current portion of acquisition-related liabilities		166		—		18,236		—		—			18,402
Accounts payable		3,655		6,845		65,018		4,569		(1,233	)		78,854
Accrued expenses		37,101		10,178		59,477		3,705		(8,965	)		101,496
Intercompany payables		162,728		4,052		245,416		2,834		(415,030	)		—
Billings in excess of costs and estimated earnings		—		—		8,931		27		—			8,958
Total current liabilities		208,925		22,348		401,068		11,135		(430,491	)		212,985
Long-term debt		1,059,642		153,318		480,599		—		(633,917	)		1,059,642
Acquisition-related liabilities		—		—		42,736		—		—			42,736
Other noncurrent liabilities		796		24,787		65,479		57,736		(55,107	)		93,691
Total liabilities		1,269,363		200,453		989,882		68,871		(1,119,515	)		1,409,054
Redeemable noncontrolling interest		—		—		—		—		33,740			33,740
Redeemable members’ interest		—		34,543		—		—		(34,543	)		—
Total stockholders’ equity/partners’ interest		285,206		136,313		374,770		52,022		(561,328	)		286,983
Total liabilities, redeemable noncontrolling interest and member’s interest	$	1,554,569	$	371,309	$	1,364,652	$	120,893	$	(1,681,646	)	$	1,729,777

Condensed Consolidating Statements of Operations

Condensed Consolidating Statements of Operations

For the three months ended September 26, 2015

	Issuers			Wholly- owned Guarantors			Non- Guarantors			Eliminations			Consolidated
Revenue	$	—		$	454,501		$	21,472		$	(4,068	)	$	471,905
Cost of revenue (excluding items shown separately below)		—			304,204			12,263			(4,068	)		312,399
General and administrative expenses		8,881			32,362			1,600			—			42,843
Depreciation, depletion, amortization and accretion		628			31,374			1,304			—			33,306
Operating (loss) income		(9,509	)		86,561			6,305			—			83,357
Other (income) expense, net		(58,666	)		3,639			(17	)		86,514			31,470
Interest expense		15,046			15,286			900			(10,796	)		20,436
Income from continuing operations before taxes		34,111			67,636			5,422			(75,718	)		31,451
Income tax benefit (expense)		—			(2,690	)		35			—			(2,655	)
Income from continuing operations		34,111			70,326			5,387			(75,718	)		34,106
Income from discontinued operations		—			(57	)		—			—			(57	)
Net income		34,111			70,383			5,387			(75,718	)		34,163
Net income attributable to minority interest		—			—			—			52			52
Net income attributable to member of Summit Materials, LLC	$	34,111		$	70,383		$	5,387		$	(75,770	)	$	34,111
Comprehensive income attributable to member of Summit Materials, LLC	$	26,805		$	69,373		$	(909	)	$	(68,464	)	$	26,805

Condensed Consolidating Statements of Operations

For the three months ended September 27, 2014

	Issuers			Non- Wholly- owned Guarantor			Wholly- owned Guarantors			Non- Guarantors			Elim- inations			Consol- idated
Revenue	$	—		$	34,171		$	348,785		$	22,626		$	(10,823	)	$	394,759
Cost of revenue (excluding items shown separately below)		—			25,603			253,284			17,433			(10,823	)		285,497
General and administrative expenses		8,694			1,651			27,418			495			—			38,258
Depreciation, depletion, amortization and accretion		406			3,708			18,618			523			—			23,255
Operating (loss) income		(9,100	)		3,209			49,465			4,175			—			47,749
Other (income) expense, net		(43,887	)		(945	)		(2,679	)		(16	)		46,119			(1,408	)
Interest expense		7,913			2,931			13,416			233			(2,408	)		22,085
Income from continuing operations before taxes		26,874			1,223			38,728			3,958			(43,711	)		27,072
Income tax benefit (expense)		—			—			(1,038	)		—			—			(1,038	)
Income from continuing operations		26,874			1,223			39,766			3,958			(43,711	)		28,110
Income from discontinued operations		—			—			(7	)		—			—			(7	)
Net income		26,874			1,223			39,773			3,958			(43,711	)		28,117
Net income attributable to minority interest		—			—			—			—			1,243			1,243
Net income attributable to member of Summit Materials, LLC	$	26,874		$	1,223		$	39,773		$	3,958		$	(44,954	)	$	26,874
Comprehensive income attributable to member of Summit Materials, LLC	$	25,110		$	1,223		$	39,773		$	2,194		$	(43,190	)	$	25,110

Condensed Consolidating Statements of Operations

For the nine months ended September 26, 2015

	Issuers			Wholly- owned Guarantors			Non- Guarantors		Eliminations			Consolidated
Revenue	$	—		$	980,153		$	78,821	$	(28,139	)	$	1,030,835
Cost of revenue (excluding items shown separately below)		—			696,068			51,909		(28,139	)		719,838
General and administrative expenses		61,634			90,959			4,935		—			157,528
Depreciation, depletion, amortization and accretion		1,686			80,997			4,135		—			86,818
Operating (loss) income		(63,320	)		112,129			17,842		—			66,651
Other (income) expense, net		(55,083	)		7,140			142		111,436			63,635
Interest expense		35,196			45,332			2,689		(21,568	)		61,649
Income from continuing operations before taxes		(43,433	)		59,657			15,011		(89,868	)		(58,633	)
Income tax benefit (expense)		—			(12,852	)		384		—			(12,468	)
Income from continuing operations		(43,433	)		72,509			14,627		(89,868	)		(46,165	)
Income from discontinued operations		—			(815	)		—		—			(815	)
Net income		(43,433	)		73,324			14,627		(89,868	)		(45,350	)
Net income attributable to minority interest		—			—			—		(1,917	)		(1,917	)
Net income attributable to member of Summit Materials, LLC	$	(43,433	)	$	73,324		$	14,627	$	(87,951	)	$	(43,433	)
Comprehensive income attributable to member of Summit Materials, LLC	$	(55,974	)	$	72,314		$	3,096	$	(75,410	)	$	(55,974	)

Condensed Consolidating Statements of Operations

For the nine months ended September 27, 2014

	Issuers			Non- Wholly- owned Guarantor			Wholly- owned Guarantors			Non- Guarantors		Elim- inations			Consol- idated
Revenue	$	—		$	69,435		$	776,502		$	43,900	$	(19,692	)	$	870,145
Cost of revenue (excluding items shown separately below)		—			53,229			581,602			30,795		(19,692	)		645,934
General and administrative expenses		26,384			5,225			80,938			1,062		—			113,609
Depreciation, depletion, amortization and accretion		1,047			10,484			51,351			1,068		—			63,950
Operating (loss) income		(27,431	)		497			62,611			10,975		—			46,652
Other expense (income), net		(36,161	)		(2,303	)		(4,233	)		29		40,369			(2,299	)
Interest expense		21,581			8,788			37,831			289		(5,934	)		62,555
(Loss) income from continuing operations before taxes		(12,851	)		(5,988	)		29,013			10,657		(34,435	)		(13,604	)
Income tax benefit		(1,427	)		—			(1,071	)		—		—			(2,498	)
(Loss) income from continuing operations		(11,424	)		(5,988	)		30,084			10,657		(34,435	)		(11,106	)
Income from discontinued operations		—			—			(356	)		—		—			(356	)
Net (loss) income		(11,424	)		(5,988	)		30,440			10,657		(34,435	)		(10,750	)
Net loss attributable to noncontrolling interest		—			—			—			—		674			674
Net (loss) income attributable to member of Summit Materials, LLC	$	(11,424	)	$	(5,988	)	$	30,440		$	10,657	$	(35,109	)	$	(11,424	)
Comprehensive (loss) income attributable to member of Summit Materials, LLC	$	(12,615	)		(5,170	)	$	30,440		$	8,893	$	(34,163	)	$	(12,615	)

Condensed Consolidating Statements of Cash Flows

Condensed Consolidating Statements of Cash Flows

For the nine months ended September 26, 2015

	Issuers			Wholly- owned Guarantors			Non- Guarantors			Elim- inations			Consol- idated
Net cash (used in) provided by operating activities	$	(140,504	)	$	112,541		$	9,203		$	(167	)	$	(18,927	)
Cash flow from investing activities:
Acquisitions, net of cash acquired		—			(505,466	)		—			—			(505,466	)
Purchase of property, plant and equipment		(3,743	)		(65,001	)		(928	)		—			(69,672	)
Proceeds from the sale of property, plant, and equipment		—			8,821			62			—			8,883
Other		—			610			—			—			610
Net cash used for investing activities		(3,743	)		(561,036	)		(866	)		—			(565,645	)
Cash flow from financing activities:
Proceeds from investment by member		490,916			—			—			—			490,916
Capital issuance costs		(12,539	)		—			—			—			(12,539	)
Net proceeds from debt issuance		1,415,750			—			—			—			1,415,750
Loans received from and payments made on loans from other Summit Companies		(1,031,576	)		1,047,015			(9,000	)		(6,439	)		—
Payments on long-term debt		(669,123	)		(583,340	)		—			1,056			(1,251,407	)
Payments on acquisition-related liabilities		(166	)		(14,852	)		—			—			(15,018	)
Financing costs		(10,911	)		—			—			—			(10,911	)
Distributions from partnership		(39,952	)		—			—			—			(39,952	)
Other		—			—			—			—			—
Net cash provided by (used for) financing activities		142,399			448,823			(9,000	)		(5,383	)		576,839
Net increase (decrease) in cash		(1,848	)		328			(663	)		(5,550	)		(7,733	)
Cash — Beginning of period		10,837			697			8,793			(7,112	)		13,215
Cash— End of period	$	8,989		$	1,025		$	8,130		$	(12,662	)	$	5,482

Condensed Consolidating Statements of Cash Flows

For the nine months ended September 27, 2014

	Issuers			Non- Wholly- owned Guarantor			Wholly- owned Guarantors			Non- Guarantors			Elim- inations			Consol- idated
Net cash used in operating activities	$	(36,504	)	$	(2,408	)	$	28,727		$	668		$	(1,319	)	$	(10,836	)
Cash flow from investing activities:
Acquisitions, net of cash acquired		(181,754	)		—			(170,187	)		—			—			(351,941	)
Purchase of property, plant and equipment		(3,674	)		(13,472	)		(46,575	)		(523	)		—			(64,244	)
Proceeds from the sale of property, plant, and equipment		—			—			9,345			230			—			9,575
Other		—			—			(409	)		—			1,166			757
Net cash (used for) provided by investing activities		(185,428	)		(13,472	)		(207,826	)		(293	)		1,166			(405,853	)
Cash flow from financing activities:
Proceeds from investment by member		24,350			—			—			1,353			(1,353	)		24,350
Net proceeds from debt issuance		657,217			—			—			—			—			657,217
Loans received from and payments made on loans from other Summit Companies		(195,590	)		16,383			189,243			(2,113	)		(7,923	)		—
Payments on long-term debt		(251,062	)		(509	)		(6,766	)		—			—			(258,337	)
Payments on acquisition-related liabilities		(1,500	)		—			(4,307	)		—			—			(5,807	)
Financing costs		(8,834	)		—			—			—			—			(8,834	)
Other		(88	)		—			(1,500	)		—			1,500			(88	)
Net cash provided by (used for) financing activities		224,493			15,874			176,670			(760	)		(7,776	)		408,501
Net increase (decrease) in cash		2,561			(6	)		(2,429	)		(385	)		(7,929	)		(8,188	)
Cash — Beginning of period		10,375			9			3,442			3,631			(2,540	)		14,917
Cash— End of period	$	12,936		$	3		$	1,013		$	3,246		$	(10,469	)	$	6,729

XML

Summary of Organization and Significant Accounting Policies (Policies)

9 Months Ended

Sep. 26, 2015

Initial Public Offering

Initial Public Offering—Summit Inc. commenced operations on March 11, 2015 upon the pricing of the initial public offering of its Class A common stock (“IPO”). Summit Inc. raised $433.0 million, net of underwriting discounts, through the issuance of 25,555,555 shares of Class A common stock at a public offering price of $18.00 per share. Summit Inc. used the offering proceeds to purchase a number of newly-issued Class A Units (“LP Units”) from Summit Holdings equal to the number of shares of Class A common stock issued to the public. Summit Inc. caused Summit Holdings to use these proceeds: (i) to redeem $288.2 million in aggregate principal amount of outstanding 10 ¹/₂% senior notes due January 31, 2020 (“2020 Notes”); (ii) to purchase 71,428,571 Class B Units of Continental Cement Company, L.L.C. (“Continental Cement”); (iii) to pay a one-time termination fee of $13.8 million primarily to affiliates of the Sponsors in connection with the termination of a transaction and management fee agreement; and (iv) for general corporate purposes. The $288.2 million redemption of 2020 Notes was completed in the second quarter of 2015 at a redemption price equal to par plus an applicable premium of $38.2 million plus $5.2 million of accrued and unpaid interest.

Follow-On Offering

Follow-On Offering—On August 11, 2015, Summit Inc. raised $555.8 million, net of underwriting discounts, through the issuance of 22,425,000 shares of Class A common stock at a public offering price of $25.75 per share. Summit Inc. used these proceeds to purchase 3,750,000 newly-issued LP Units from Summit Holdings and 18,675,000 LP Units from certain of our pre-IPO owners, at a purchase price per LP Unit equal to the public offering price per share of Class A common stock, less underwriting discounts and commissions. Summit Holdings used the proceeds from the 3,750,000 newly-issued LP Units to pay the deferred purchase price of $80.0 million related to the July 17, 2015 acquisition of a cement plant and a quarry in Davenport, Iowa, and seven cement terminals along the Mississippi River (the “Davenport Assets”) and for general corporate purposes.

Basis of Presentation

Basis of Presentation—These unaudited consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures typically included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The Company’s financial position as of December 27, 2014, the results of operations for the three and nine months ended September 27, 2014 and cash flows for the nine months ended September 27, 2014 reflect those of Summit Holdings. These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements of Summit Holdings and the notes thereto as of and for the year ended December 27, 2014. The Company continues to follow the accounting policies set forth in those consolidated financial statements.

Management believes that these consolidated interim financial statements include all adjustments, normal and recurring in nature, that are necessary to present fairly the financial position of the Company as of September 26, 2015, the results of operations for the three and nine months ended September 26, 2015 and September 27, 2014 and cash flows for the nine months ended September 26, 2015 and September 27, 2014. All significant intercompany balances and transactions have been eliminated.

The Company’s fiscal year is based on a 52-53 week year with each quarter composed of 13 weeks ending on a Saturday. The 53-week year occurs approximately once every seven years and will occur in 2015. The additional week in the 53-week year will be included in the fourth quarter.

The consolidated financial statements of the Company include the accounts of Summit Inc. and its subsidiaries, including noncontrolling interests. As a result of the Reorganization, Summit Holdings became a variable interest entity. Summit Inc. is the primary beneficiary of Summit Holdings as a result of its 100% voting power and control over Summit Holdings and its obligation to absorb losses and its right to receive benefits of Summit Holdings and thus consolidates Summit Holdings in its consolidated financial statements with a corresponding noncontrolling interest elimination of 72.2% between March 11, 2015 and August 11, 2015 and 50.7% between August 8, 2015 and September 26, 2015. Summit Inc.’s August 2015 purchase of 22,425,000 LP Units, 18,675,000 of which were previously held by certain of our pre-IPO owners, decreased the noncontrolling interest’s economic interest from 72.2% to 50.7%.

Noncontrolling interests in consolidated subsidiaries represent a 20% ownership in Ohio Valley Asphalt, LLC and, prior to the IPO and concurrent purchase of the noncontrolling interests of Continental Cement, a 30% redeemable ownership in Continental Cement.

Use of Estimates

Use of Estimates—Preparation of these consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities and reported amounts of revenue and expenses. Such estimates include the valuation of accounts receivable, inventories, goodwill, intangibles and other long-lived assets, pension and other postretirement obligations and asset retirement obligations. Estimates also include revenue earned on contracts and costs to complete contracts. Most of the Company’s paving and related services are performed under fixed unit-price contracts with state and local governmental entities. Management regularly evaluates its estimates and assumptions based on historical experience and other factors, including the current economic environment. Management adjusts such estimates and assumptions when circumstances dictate. As future events and their effects cannot be determined with precision, actual results can differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, are reflected in the Company’s consolidated financial statements when the change in estimate occurs.

Business and Credit Concentrations

Business and Credit Concentrations—The Company’s operations are conducted primarily across 18 U.S. states and in British Columbia, Canada, with the most significant revenue generated in Texas, Kansas, Kentucky, Utah and Missouri. The Company’s accounts receivable consist primarily of amounts due from customers within these areas. Therefore, collection of these accounts is dependent on the economic conditions in the aforementioned states, as well as specific situations affecting individual customers. Credit granted within the Company’s trade areas has been granted to many customers, and management does not believe that a significant concentration of credit exists with respect to any individual customer or group of customers. No single customer accounted for more than 10% of the Company’s total revenue in the three and nine months ended September 26, 2015 and September 27, 2014.

Earnings per Share

Earnings per Share—The Company computes basic earnings per share attributable to stockholders by dividing income attributable to Summit Inc. by the weighted-average shares of Class A common stock outstanding. Diluted earnings per share reflects the potential dilution beyond shares for basic earnings per share that could occur if securities or other contracts to issue common stock were exercised, converted into common stock, or resulted in the issuance of common stock that would have shared in the Company’s earnings. Since the Class B common stock has no economic value, those shares are not included in the weighted-average common share amount for basic or diluted earnings per share. In addition, as the shares of Class A common stock are issued by Summit Inc., the earnings and equity interests of noncontrolling interests are not included in basic or diluted earnings per share.

Fair Value Measurements

Fair Value Measurements—Certain acquisitions made by the Company require the payment of contingent amounts of purchase consideration. These payments are contingent on specified operating results being achieved in periods subsequent to the acquisition and will only be made if earn-out thresholds are achieved. Contingent consideration obligations are measured at fair value each reporting period. Any adjustments to fair value are recognized in earnings in the period identified. In the third quarter of 2015, the Company entered into interest rate derivatives on $200.0 million of its term loan borrowings to add stability to interest expense and to manage its exposure to interest rate movements. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive loss and will be subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The fair value of contingent consideration and derivatives as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015		December 27, 2014
Current portion of derivatives and acquisition-related liabilities:
Contingent consideration	$	4,559	$	2,375
Cash flow hedge		114
Derivatives and acquisition- related liabilities:
Contingent consideration	$	2,711	$	5,379
Cash flow hedge		897

The fair value of contingent consideration was based on unobservable, or Level 3, inputs, including projected probability-weighted cash payments and an 11.0% discount rate, which reflects a market discount rate. Changes in fair value may occur as a result of a change in actual or projected cash payments, the probability weightings applied by the Company to projected payments or a change in the discount rate. Significant increases or decreases in any of these inputs in isolation could result in a lower, or higher, fair value measurement. The fair value of the derivatives are based on observable, or Level 2, inputs such as interest rates, bond yields and prices in inactive markets. There were no material valuation adjustments in the three or nine months ended September 26, 2015 or September 27, 2014.

Financial Instruments

Financial Instruments—The Company’s financial instruments include debt and certain acquisition-related liabilities (deferred consideration and noncompete obligations). The carrying value and fair value of these financial instruments as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015				December 27, 2014
	Fair Value		Carrying Value		Fair Value		Carrying Value
Level 2
Long-term debt(1)	$	1,155,557	$	1,156,193	$	1,101,873	$	1,064,917
Level 3
Current portion of deferred consideration and noncompete obligations(2)		15,632		15,632		16,027		16,027
Long term portion of deferred consideration and noncompete obligations(3)		39,267		39,267		37,357		37,357

(1) $8.1 million and $5.3 million included in current portion of debt as of September 26, 2015 and December 27, 2014, respectively. Excludes $60.0 million outstanding on the revolving credit facility as of September 26, 2015.

(2) Included in current portion of acquisition-related liabilities on the balance sheet.

(3) Included in acquisition-related liabilities on the balance sheet.

The fair value of debt was determined based on observable, or Level 2, inputs, such as interest rates, bond yields and quoted prices in inactive markets. The fair values of the deferred consideration and noncompete obligations were determined based on unobservable, or Level 3, inputs, including the cash payment terms in the purchase agreements and a discount rate reflecting the Company’s credit risk.

Redeemable Noncontrolling Interest

Redeemable Noncontrolling Interest — On March 17, 2015, upon the consummation of the IPO and the transactions contemplated by a contribution and purchase agreement entered into with the holders of all of the outstanding Class B Units of Continental Cement, Continental Cement became a wholly-owned indirect subsidiary of Summit Inc. The noncontrolling interests of Continental Cement were acquired for aggregate consideration of $64.1 million, consisting of $35.0 million of cash, 1,029,183 shares of Summit Inc.’s Class A common stock and $15.0 million aggregate principal amount of non-interest bearing notes payable in six annual installments of $2.5 million, beginning on March 17, 2016.

New Accounting Standards

New Accounting Standards — In April 2015, the FASB issued Accounting Standards Update (“ASU”) 2015-03, Simplifying the Presentation of Debt Issuance Costs, which changes the presentation of debt issuance costs in financial statements. Under the ASU, an entity will present such costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the costs will continue to be reported as interest expense. The ASU is effective for public entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The guidance will be applied retrospectively to all prior periods (i.e., the balance sheet for each period will be adjusted). Had the Company adopted this guidance as of the current period, both Other Assets (noncurrent) and Long-term Debt as of September 26, 2015 and December 27, 2014, would have decreased by $8.8 million and $16.8 million, respectively.

In April 2015, the FASB issued a new accounting standard, ASU 2015-04, Practical Expedient for the Measurement Date of an Employer’s Defined Benefit Obligation and Plan Assets, which gives an employer whose fiscal year-end does not coincide with a calendar month-end (e.g., an entity that has a 52- or 53-week fiscal year) the ability, as a practical expedient, to measure defined benefit retirement obligations and related plan assets as of the month-end that is closest to its fiscal year-end. The ASU is effective for public business entities for financial statements issued for fiscal years beginning after December 31, 2015, and interim periods within those fiscal years. Early application is permitted, and the ASU should be applied prospectively. The Company does not expect the adoption of this ASU to have a material effect on its financial position or results of operations.

In May 2014, the FASB issued a new accounting standard to improve and converge the financial reporting requirements for revenue from contracts with customers. ASU No. 2014-09, Revenue from Contracts with Customers, prescribes a five-step model for revenue recognition that will replace most existing revenue recognition guidance in U.S. GAAP. The ASU will supersede nearly all existing revenue recognition guidance under U.S. GAAP and provides that an entity recognize revenue when it transfers 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 update also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments, and assets recognized from costs incurred to obtain or fulfill a contract. ASU No. 2014-09 allows for either full retrospective or modified retrospective adoption. In July 2015, the FASB postponed the effective date of the new revenue standard by one year to the first quarter of 2018. Early adoption is permitted, but no earlier than 2017. Management is currently assessing the effect that the adoption of this standard will have on the consolidated financial statements.

Reclassifications

Reclassifications — Certain amounts in the prior year have been reclassified to conform to the to the current period’s presentation.

Summit Materials, LLC [Member]

Initial Public Offering

Initial Public Offering—Summit Inc. commenced operations on March 11, 2015 upon the pricing of the initial public offering of its Class A common stock (“IPO”). Summit Inc. raised $433.0 million, net of underwriting discounts, through the issuance of 25,555,555 shares of Class A common stock at a public offering price of $18.00 per share. Summit Inc. used the offering proceeds to purchase a number of newly-issued Class A Units (“LP Units”) from Summit Holdings equal to the number of shares of Class A common stock issued to the public. Summit Inc. caused Summit Holdings to use these proceeds: (i) to redeem $288.2 million in aggregate principal amount of outstanding 10 ¹/₂% Senior Notes due January 31, 2020 (“2020 Notes”); (ii) to purchase 71,428,571 Class B Units of Continental Cement Company, L.L.C. (“Continental Cement”); (iii) to pay a one-time termination fee of $13.8 million primarily to affiliates of the Sponsors in connection with the termination of a transaction and management fee agreement; and (iv) for general corporate purposes. The $288.2 million redemption of 2020 Notes was completed in the second quarter of 2015 at a redemption price equal to par plus an applicable premium of $38.2 million plus $5.2 million of accrued and unpaid interest.

Follow-On Offering

Follow-On Offering—On August 11, 2015, Summit Inc. raised $555.8 million, net of underwriting discounts, through the issuance of 22,425,000 shares of Class A common stock at a public offering price of $25.75 per share. Summit Inc. used these proceeds to purchase 3,750,000 newly-issued LP Units from Summit Holdings and 18,675,000 LP Units from certain of our pre-IPO owners, at a purchase price per LP Unit equal to the public offering price per share of Class A common stock, less underwriting discounts and commissions. Summit Holdings used the proceeds from the 3,750,000 newly-issued LP Units to pay the deferred purchase price of $80.0 million related to the July 17, 2015 acquisition of a cement plant and a quarry in Davenport, Iowa, and seven cement terminals along the Mississippi River (the “Davenport Assets”) and for general corporate purposes.

Basis of Presentation

Basis of Presentation—These unaudited consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures typically included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. These unaudited consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto as of and for the year ended December 27, 2014. The Company continues to follow the accounting policies set forth in those consolidated financial statements.

Management believes that these consolidated interim financial statements include all adjustments, normal and recurring in nature, that are necessary to present fairly the financial position of the Company as of September 26, 2015, the results of operations for the three and nine months ended September 26, 2015 and September 27, 2014 and cash flows for the nine months ended September 26, 2015 and September 27, 2014. All significant intercompany balances and transactions have been eliminated.

The Company’s fiscal year is based on a 52-53 week year with each quarter composed of 13 weeks ending on a Saturday. The 53-week year occurs approximately once every seven years and will occur in 2015. The additional week in the 53-week year will be included in the fourth quarter.

The consolidated financial statements of the Company include the accounts of Summit LLC and its subsidiaries, including noncontrolling interests. Noncontrolling interests in consolidated subsidiaries represent a 20% ownership in Ohio Valley Asphalt, LLC and, prior to the IPO and concurrent purchase of the noncontrolling interests of Continental Cement, a 30% redeemable ownership in Continental Cement.

Use of Estimates

Use of Estimates—Preparation of these consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities and reported amounts of revenue and expenses. Such estimates include the valuation of accounts receivable, inventories, goodwill, intangibles and other long-lived assets, pension and other postretirement obligations and asset retirement obligations. Estimates also include revenue earned on contracts and costs to complete contracts. Most of the Company’s paving and related services are performed under fixed unit-price contracts with state and local governmental entities. Management regularly evaluates its estimates and assumptions based on historical experience and other factors, including the current economic environment. Management adjusts such estimates and assumptions when circumstances dictate. As future events and their effects cannot be determined with precision, actual results can differ significantly from estimates made. Changes in estimates, including those resulting from continuing changes in the economic environment, are reflected in the Company’s consolidated financial statements when the change in estimate occurs.

Business and Credit Concentrations

Business and Credit Concentrations—The Company’s operations are conducted primarily across 18 U.S. states and in British Columbia, Canada, with the most significant revenue generated in Texas, Kansas, Kentucky, Utah and Missouri. The Company’s accounts receivable consist primarily of amounts due from customers within these areas. Therefore, collection of these accounts is dependent on the economic conditions in the aforementioned states, as well as specific situations affecting individual customers. Credit granted within the Company’s trade areas has been granted to many customers, and management does not believe that a significant concentration of credit exists with respect to any individual customer or group of customers. No single customer accounted for more than 10% of total revenue in the three and nine months ended September 26, 2015 and September 27, 2014.

Fair Value Measurements

Fair Value Measurements—Certain acquisitions made by the Company require the payment of contingent amounts of purchase consideration. These payments are contingent on specified operating results being achieved in periods subsequent to the acquisition and will only be made if earn-out thresholds are achieved. Contingent consideration obligations are measured at fair value each reporting period. Any adjustments to fair value are recognized in earnings in the period identified. In the third quarter of 2015, the Company entered into interest rate derivatives on $200.0 million of its term loan borrowings to add stability to interest expense and to manage its exposure to interest rate movements. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive loss and will be subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The fair value of contingent consideration and derivatives as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015		December 27, 2014
Current portion of derivatives and acquisition-related liabilities:
Contingent consideration	$	4,559	$	2,375
Cash flow hedge		114
Derivatives and acquisition- related liabilities:
Contingent consideration	$	2,711	$	5,379
Cash flow hedge		897

The fair value of contingent consideration was based on unobservable, or Level 3, inputs, including projected probability-weighted cash payments and an 11.0% discount rate, which reflects a market discount rate. Changes in fair value may occur as a result of a change in actual or projected cash payments, the probability weightings applied by the Company to projected payments or a change in the discount rate. Significant increases or decreases in any of these inputs in isolation could result in a lower, or higher, fair value measurement. The fair value of the derivatives are based on observable, or Level 2, inputs such as interest rates, bond yields and prices in inactive markets. There were no material valuation adjustments in the three or nine months ended September 26, 2015 or September 27, 2014.

Financial Instruments

Financial Instruments—The Company’s financial instruments include debt and certain acquisition-related liabilities (deferred consideration and noncompete obligations). The carrying value and fair value of these financial instruments as of September 26, 2015 and December 27, 2014 was:

	September 26, 2015				December 27, 2014
	Fair Value		Carrying Value		Fair Value		Carrying Value
Level 2
Long-term debt(1)	$	1,155,557	$	1,156,193	$	1,101,873	$	1,064,917
Level 3
Current portion of deferred consideration and noncompete obligations(2)		13,132		13,132		16,027		16,027
Long term portion of deferred consideration and noncompete obligations(3)		30,609		30,609		37,357		37,357

(1) $8.1 million and $5.3 million included in current portion of debt as of September 26, 2015 and December 27, 2014, respectively. Excludes $60.0 million outstanding on the revolving credit facility as of September 26, 2015.

(2) Included in current portion of acquisition-related liabilities on the balance sheet.

(3) Included in acquisition-related liabilities on the balance sheet.

The fair value of debt was determined based on observable, or Level 2 inputs, such as interest rates, bond yields and quoted prices in inactive markets. The fair values of the deferred consideration and noncompete obligations were determined based on unobservable, or Level 3, inputs, including the cash payment terms in the purchase agreements and a discount rate reflecting the Company’s credit risk.

Redeemable Noncontrolling Interest

Redeemable Noncontrolling Interest — On March 17, 2015, upon the consummation of the IPO and the transactions contemplated by a contribution and purchase agreement entered into with the holders of all of the outstanding Class B Units of Continental Cement, Continental Cement became a wholly-owned indirect subsidiary of Summit LLC. The noncontrolling interests of Continental Cement were acquired for aggregate consideration of $64.1 million, consisting of $35.0 million of cash, 1,029,183 shares of Summit Inc.’s Class A common stock and $15.0 million aggregate principal amount of non-interest bearing notes payable in six annual installments of $2.5 million, beginning on March 17, 2016. The notes payable is a liability of Summit Holdings and, is therefore not included in the liabilities of Summit LLC.

New Accounting Standards

New Accounting Standards — In April 2015, the FASB issued Accounting Standards Update (“ASU”) 2015-03, Simplifying the Presentation of Debt Issuance Costs, which changes the presentation of debt issuance costs in financial statements. Under the ASU, an entity will present such costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the costs will continue to be reported as interest expense. The ASU is effective for public entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The guidance will be applied retrospectively to all prior periods (i.e., the balance sheet for each period will be adjusted). Had the Company adopted this guidance as of the current period, both Other Assets (noncurrent) and Long-term Debt as of September 26, 2015 and December 27, 2014, would have decreased by $8.8 million and $16.8 million, respectively.

In April 2015, the FASB issued a new accounting standard, ASU 2015-04, Practical Expedient for the Measurement Date of an Employer’s Defined Benefit Obligation and Plan Assets, which gives an employer whose fiscal year-end does not coincide with a calendar month-end (e.g., an entity that has a 52- or 53-week fiscal year) the ability, as a practical expedient, to measure defined benefit retirement obligations and related plan assets as of the month-end that is closest to its fiscal year-end. The ASU is effective for public business entities for financial statements issued for fiscal years beginning after December 31, 2015, and interim periods within those fiscal years. Early application is permitted, and the ASU should be applied prospectively. The Company does not expect the adoption of this ASU to have a material effect on its financial position or results of operations.

In May 2014, the FASB issued a new accounting standard to improve and converge the financial reporting requirements for revenue from contracts with customers. ASU No. 2014-09, Revenue from Contracts with Customers, prescribes a five-step model for revenue recognition that will replace most existing revenue recognition guidance in U.S. GAAP. The ASU will supersede nearly all existing revenue recognition guidance under U.S. GAAP and provides that an entity recognize revenue when it transfers 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 update also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and

changes in judgments, and assets recognized from costs incurred to obtain or fulfill a contract. ASU No. 2014-09 allows for either full retrospective or modified retrospective adoption. In July 2015, the FASB postponed the effective date of the new revenue standard by one year to the first quarter of 2018. Early adoption is permitted, but no earlier than 2017. Management is currently assessing the effect that the adoption of this standard will have on the consolidated financial statements.

Reclassifications

Reclassifications — Certain amounts in the prior year have been reclassified to conform to the current period’s presentation.

XML

Consolidated Statements of Changes in Redeemable Noncontrolling Interest and Stockholders' Equity /Member's Interest - USD ($) $ in Thousands	Total	Common Class A [Member]	Common Class B [Member]	Noncontrolling Interest [Member]	Accumulated Deficit/Earnings [Member]	Accumulated Other Comprehensive Loss (AOCI) [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Common Class A [Member]	Additional Paid-in Capital [Member] Common Class B [Member]	Redeemable Noncontrolling Interest [Member]	Summit Materials, LLC [Member]	Summit Materials, LLC [Member] Noncontrolling Interest [Member]	Summit Materials, LLC [Member] Accumulated Deficit/Earnings [Member]	Summit Materials, LLC [Member] Accumulated Other Comprehensive Loss (AOCI) [Member]	Summit Materials, LLC [Member] Redeemable Noncontrolling Interest [Member]	Summit Materials, LLC [Member] Members Equity [Member]	Summit Materials, LLC [Member] Parent Including Portion Attributable to Non Redeemable Noncontrolling Interest [Member]	Summit Holdings [Member] Partners' Interest [Member]
Beginning Balance at Dec. 28, 2013	$ 286,817									$ 24,767		$ 1,211			$ 24,767			$ 285,606
Beginning Balance at Dec. 28, 2013												1,211	$ (198,511)	$ (6,045)		$ 486,896	$ 283,551
Contributed capital, Summit Materials, Inc	24,350																	24,350
Contributed capital, Summit Materials, LLC																24,350	24,350
Accretion/ redemption value adjustment	(6,211)									6,211			(6,211)		6,211		(6,211)	(6,211)
Net income (loss)	(10,750)									597	$ (10,750)	77	(11,424)		597		(11,347)	(11,424)
Other comprehensive income (loss)	(946)									245	(946)			(1,191)	245		(1,191)	(1,191)
Repurchase of member's interest	88															88	88	88
Share-based compensation	1,750												(1,982)			3,732	1,750	1,750
Ending Balance at Sep. 27, 2014	294,080											1,288						292,792
Ending Balance at Sep. 27, 2014												1,288	(218,128)	(7,236)		514,890	290,814
Ending Balance at Sep. 27, 2014										31,820					31,820
Beginning Balance at Dec. 27, 2014	33,740									33,740	33,740				33,740
Beginning Balance at Dec. 27, 2014											286,983	1,298	(217,416)	(15,546)		518,647	286,983
Beginning Balance at Dec. 27, 2014	286,983											1,298						285,685
Accretion/ redemption value adjustment	(32,252)									32,252								(32,252)
Net income (loss)	(41,415)									(1,890)		(77)						(41,338)
Other comprehensive income (loss)	(5,249)																	(5,249)
Share-based compensation	424																	424
Ending Balance at Mar. 11, 2015	208,491											1,221						207,270
Ending Balance at Mar. 11, 2015										64,102
Beginning Balance at Dec. 27, 2014	33,740									33,740	33,740				33,740
Beginning Balance at Dec. 27, 2014											286,983	1,298	(217,416)	(15,546)		518,647	286,983
Beginning Balance at Dec. 27, 2014	286,983											1,298						285,685
Contributed capital, Summit Materials, LLC																542,479	542,479
Accretion/ redemption value adjustment													(32,252)		(31,850)		(32,252)
Net income (loss)	(45,932)										(45,350)	(27)	(43,433)		$ (1,890)		(43,460)
Other comprehensive income (loss)	(12,541)										(12,541)			(12,541)			(12,541)
Share-based compensation																18,589	18,589
Distributions from partnership																(39,952)	(39,952)
Ending Balance at Sep. 26, 2015	722,193	$ 490	$ 690	$ 117,790	$ 4,355	$ (2,607)	$ 600,204					1,271
Ending Balance at Sep. 26, 2015											719,846	1,271	(293,101)	(28,087)		1,039,763	719,846
Ending Balance, Shares at Sep. 26, 2015		49,009,738	69,007,297
Issuance of common stock, Shares		25,555,555
Recording of noncontrolling interest upon reorganization				207,270														(207,270)
Beginning Balance at Mar. 11, 2015	208,491											1,221						$ 207,270
Net income (loss)	(2,627)			(7,032)	4,355							50
Other comprehensive income (loss)	(7,292)			(4,685)		(2,607)
Share repurchase, Shares			(100)
Purchase of noncontrolling interests	(32,790)	$ 10		(51,315)			18,515			$ 64,102
Purchase of noncontrolling interests, Shares		1,029,183
Share-based compensation	18,165						18,165
Distributions from partnership	(26,448)			(26,448)
Ending Balance at Sep. 26, 2015	722,193	$ 490	$ 690	$ 117,790	$ 4,355	$ (2,607)	$ 600,204					1,271
Ending Balance at Sep. 26, 2015											$ 719,846	$ 1,271	$ (293,101)	$ (28,087)		$ 1,039,763	$ 719,846
Ending Balance, Shares at Sep. 26, 2015		49,009,738	69,007,297
Issuance of common stock, Values	$ 564,694	$ 480	$ 690					$ 564,214	$ (690)
Issuance of common stock, Shares		47,980,555	69,007,397

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 26, 2015	Dec. 27, 2014
Property, plant and equipment, accumulated depreciation, depletion and amortization	$ 343,087	$ 279,375
Intangible assets, accumulated amortization	$ 4,851	3,073
Common Class A [Member]
Common stock, par value	$ 0.01
Common stock, shares authorized	1,000,000,000
Common stock, shares issued	49,009,738
Common stock, shares outstanding	49,009,738
Common Class B [Member]
Common stock, par value	$ 0.01
Common stock, shares authorized	250,000,000
Common stock, shares issued	69,007,297
Common stock, shares outstanding	69,007,297
Summit Materials, LLC [Member]
Property, plant and equipment, accumulated depreciation, depletion and amortization	$ 343,087	279,375
Intangible assets, accumulated amortization	$ 4,851	$ 3,073

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Income Taxes

9 Months Ended

Sep. 26, 2015

Income Taxes

10. INCOME TAXES

Summit Inc.’s tax provision includes its proportional share of Summit Holdings’ tax attributes. Summit Holdings’ subsidiaries are primarily limited liability companies, but do include certain entities organized as C corporations. The tax attributes related to the limited liability companies are passed on to Summit Holdings and then to its partners, including Summit Inc. The tax attributes associated with the C corporation subsidiaries are fully reflected in the Company’s accounts.

As of September 26, 2015 and December 27, 2014, Summit Inc. and its subsidiaries had not recognized any liabilities for uncertain tax positions. The Company records interest and penalties as a component of the income tax provision. No material interest or penalties were recognized in income tax expense during the three and nine months ended September 26, 2015 and September 27, 2014.

Summit Inc. — As of the IPO, Summit Inc. had a net deferred tax asset of $50.5 million, which primarily consisted of a $69.0 million temporary difference related to the tax intangible assets basis in excess of book, offset by the $6.9 million and $10.9 million book aggregate reserves and fixed assets in excess of tax basis, respectively.

Valuation Allowance—In assessing the realizability of deferred tax assets, including the deferred tax assets resulting from the expected taxable loss in 2015 and those generated under the tax receivable agreement, management determined that it was more likely than not that the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible and consideration of tax-planning strategies. Considering these factors, a full valuation allowance on $299.9 million of deferred tax assets as of September 26, 2015 was recorded, which has resulted in no provision for Summit Inc.’s income taxes in the three and nine months ended September 26, 2015.

Tax Receivable Agreement—Upon the consummation of the Reorganization, the Company entered into a tax receivable agreement with the holders of LP Units and certain other indirect pre-IPO owners (“Investor Entities”) that provides for the payment by Summit Inc. to exchanging holders of LP Units of 85% of the benefits, if any, that Summit Inc. is deemed to realize as a result of (i) increases in the tax basis of tangible and intangible assets of Summit Holdings and (ii) the utilization of certain net operating losses of the Investor Entities and certain other tax benefits related to entering into the tax receivable agreement, including tax benefits attributable to payments under the tax receivable agreement. In August 2015, 18,675,000 LP units were purchased by Summit Inc. resulting in an estimated $249.4 million deferred tax asset, approximately 85% of which is a liability due to the holders of the exchanged LP Units. As discussed above, a full valuation allowance was recognized on the deferred tax asset. As realization of the tax benefit is not currently deemed probable, the related liability to the former LP Unit holders is not considered probable and is not included in the consolidated balance sheet.

Tax Distributions – The holders of Summit Holdings’ LP Units, including Summit Inc., incur U.S. federal, state and local income taxes on their share of any taxable income of Summit Holdings. The limited partnership agreement of Summit Holdings provides for pro rata cash distributions (“tax distributions”) to the holders of the LP Units in an amount generally calculated to provide each holder of LP Units with sufficient cash to cover its tax liability in respect of the LP Units. In general, these tax distributions are computed based on Summit Holdings’ estimated taxable income allocated to each holder of LP Units multiplied by an assumed tax rate equal to the highest effective marginal combined U.S. federal, state and local income tax rate applicable to an individual or corporate resident in New York, New York (or a corporate resident in certain circumstances). Summit Holdings paid tax distributions totaling $23.5 million and $39.9 million, of which $14.6 million and $26.4 million were paid to its partners, other than Summit Inc., and $8.9 million and $13.5 million was paid to Summit Inc., in the three and nine months ended September 26, 2015, respectively.

C Corporation Subsidiaries —The effective income tax rate for the C corporations differs from the statutory federal rate primarily due to (1) tax depletion expense in excess of the expense recorded under U.S. GAAP, (2) state income taxes and the effect of graduated tax rates and (3) certain non-recurring items, such as differences in the treatment of transaction costs, which are often not deductible for tax purposes.

Summit Materials, LLC [Member]

Income Taxes

10. INCOME TAXES

Summit LLC is a limited liability company and passes its tax attributes for federal and state tax purposes to its parent company and is generally not subject to federal or state income tax. However, certain subsidiary entities file federal and state income tax returns due to their status as C corporations. The provision for income taxes is primarily composed of federal, state and local income taxes for the subsidiary entities that have C corporation status.

The effective income tax rate for these entities differs from the statutory federal rate primarily due to (1) tax depletion expense in excess of the expense recorded under U.S. GAAP, (2) state income taxes and the effect of graduated tax rates and (3) certain non-recurring items, such as differences in the treatment of transaction costs, which are often not deductible for tax purposes.

As of September 26, 2015 and December 27, 2014, the Company has not recognized any liabilities for uncertain tax positions. The Company records interest and penalties as a component of the income tax provision. No material interest or penalties were recognized in income tax expense during the three or nine months ended September 26, 2015 and September 27, 2014.

Tax Distributions – The holders of Summit Holdings’ LP Units, including Summit Inc., incur U.S. federal, state and local income taxes on their share of any taxable income of Summit Holdings. The limited partnership agreement of Summit Holdings provides for pro rata cash distributions (“tax distributions”) to the holders of the LP Units in an amount generally calculated to provide each holder of LP Units with sufficient cash to cover its tax liability in respect of the LP Units. In general, these tax distributions are computed based on Summit Holdings’ estimated taxable income allocated to each holder of LP Units multiplied by an assumed tax rate equal to the highest effective marginal combined U.S. federal, state and local income tax rate applicable to an individual or corporate resident in New York, New York (or a corporate resident in certain circumstances). Summit LLC paid distributions totaling $23.5 million and $39.9 million, of which $14.6 million and $26.4 million was paid to Summit Holdings, who, in turn, distributed the funds to its partners, other than Summit Inc., and $8.9 million and $13.5 million was paid to Summit Inc., in the three and nine months ended September 26, 2015, respectively.

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Document and Entity Information - shares		9 Months Ended
	Sep. 26, 2015	Sep. 26, 2015	Oct. 27, 2015
Document Information [Line Items]
Document Type		10-Q
Amendment Flag		false
Document Period End Date		Sep. 26, 2015
Document Fiscal Year Focus		2015
Document Fiscal Period Focus		Q3
Trading Symbol		SUM
Entity Registrant Name		SUMMIT MATERIALS, INC.
Entity Central Index Key		0001621563
Current Fiscal Year End Date		--12-26
Entity Filer Category		Non-accelerated Filer
Membership interests description	As of October 27, 2015, 100% of Summit Materials, LLC’s outstanding limited liability company interests were held by Summit Materials Intermediate Holdings, LLC, its sole member and an indirect subsidiary of Summit Materials, Inc.
Common Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding			49,009,738
Common Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding			69,007,297
Summit Materials, LLC [Member]
Document Information [Line Items]
Document Type		10-Q
Amendment Flag		false
Document Period End Date		Sep. 26, 2015
Document Fiscal Year Focus		2015
Document Fiscal Period Focus		Q3
Entity Registrant Name		SUMMIT MATERIALS, LLC
Entity Central Index Key		0001571371
Current Fiscal Year End Date		--12-26
Entity Filer Category		Non-accelerated Filer
Membership interests percentage			100.00%

XML

Net Income Per Share

9 Months Ended

Sep. 26, 2015

Earnings Per Share [Abstract]

Net Income Per Share

11. NET INCOME PER SHARE

Immediately prior to the consummation of the Company’s IPO, the Company did not have outstanding common stock. In conjunction with the IPO, Summit Inc. sold 25,555,555 shares of Class A shares common stock to the public and issued 1,029,183 shares of Class A common stock in conjunction with the purchase of the noncontrolling interest of Continental Cement. In connection with the follow on offering on August 11, 2015, Summit Inc. sold 22,425,000 shares of Class A common stock to the public, resulting in 49,009,738 shares of Class A common stock outstanding as of September 26, 2015. The 99,342,035 LP Units and 250,000 of outstanding stock options are excluded from the calculations as they would have an antidilutive effect.

The following table reconciles basic to diluted loss per share:

	September 26, 2015
	Three months ended		Nine months ended
Net income attributable to Summit Inc.	$	14,711	$	4,355
Weighted-average common shares:
Weighted average shares of Class A shares		37,920,452		31,768,406
Basic earnings per share	$	0.39	$	0.14
Weighted average shares of Class A shares		37,920,452		31,768,406
Warrants		43,478		42,909
Weighted average dilutive shares		37,963,930		31,811,315
Diluted earnings per share	$	0.39	$	0.14

Basic and diluted earnings per share for discontinued operations attributable to Summit Inc. were $0.00 and $0.01 in the three and nine months ended September 26, 2015.

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Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Revenue:
Product	$ 338,020	$ 258,860	$ 748,210	$ 580,351
Service	88,266	89,276	182,224	196,214
Net revenue	426,286	348,136	930,434	776,565
Delivery and subcontract revenue	45,619	46,623	100,401	93,580
Total revenue	471,905	394,759	1,030,835	870,145
Cost of revenue (excluding items shown separately below):
Product	207,500	176,967	490,923	411,581
Service	59,280	61,907	128,514	140,773
Net cost of revenue	266,780	238,874	619,437	552,354
Delivery and subcontract cost	45,619	46,623	100,401	93,580
Total cost of revenue	312,399	285,497	719,838	645,934
General and administrative expenses	42,539	35,517	149,484	105,872
Depreciation, depletion, amortization and accretion	33,306	23,255	86,818	63,950
Transaction costs	304	2,741	8,044	7,737
Operating income (loss)	83,357	47,749	66,651	46,652
Other income, net	(1,171)	(1,408)	(678)	(2,299)
Loss on debt financings	32,641		64,313
Interest expense	20,727	22,085	62,231	62,555
Income (loss) from continuing operations before taxes	31,160	27,072	(59,215)	(13,604)
Income tax benefit	(2,655)	(1,038)	(12,468)	(2,498)
Income (loss) from continuing operations	33,815	28,110	(46,747)	(11,106)
Income from discontinued operations	(57)	(7)	(815)	(356)
Net income (loss)	$ 33,872	28,117	$ (45,932)	(10,750)
Net income per share of Class A common stock:
Basic	$ 0.39		$ 0.14
Diluted	$ 0.39		$ 0.14
Net income (loss)	$ 14,711		$ 4,355
Weighted average shares of Class A common stock:
Diluted	37,963,930		31,811,315
Summit Materials, LLC [Member]
Revenue:
Product	$ 338,020	258,860	$ 748,210	580,351
Service	88,266	89,276	182,224	196,214
Net revenue	426,286	348,136	930,434	776,565
Delivery and subcontract revenue	45,619	46,623	100,401	93,580
Total revenue	471,905	394,759	1,030,835	870,145
Cost of revenue (excluding items shown separately below):
Product	207,500	176,967	490,923	411,581
Service	59,280	61,907	128,514	140,773
Net cost of revenue	266,780	238,874	619,437	552,354
Delivery and subcontract cost	45,619	46,623	100,401	93,580
Total cost of revenue	312,399	285,497	719,838	645,934
General and administrative expenses	42,539	35,517	149,484	105,872
Depreciation, depletion, amortization and accretion	33,306	23,255	86,818	63,950
Transaction costs	304	2,741	8,044	7,737
Operating income (loss)	83,357	47,749	66,651	46,652
Other income, net	(1,171)	(1,408)	(678)	(2,299)
Loss on debt financings	32,641		64,313
Interest expense	20,436	22,085	61,649	62,555
Income (loss) from continuing operations before taxes	31,451	27,072	(58,633)	(13,604)
Income tax benefit	(2,655)	(1,038)	(12,468)	(2,498)
Income (loss) from continuing operations	34,106	28,110	(46,165)	(11,106)
Income from discontinued operations	(57)	(7)	(815)	(356)
Net income (loss)	34,163	28,117	(45,350)	(10,750)
Net income (loss) attributable to noncontrolling interest	52	1,243	(1,917)	674
Net income per share of Class A common stock:
Net income (loss)	34,111	26,874	(43,433)	(11,424)
Summit Holdings [Member]
Net income per share of Class A common stock:
Net income (loss)	$ (19,109)	$ (26,874)	$ 48,370	$ 11,424
Common Class A [Member]
Net income per share of Class A common stock:
Basic	$ 0.39		$ 0.14
Diluted	$ 0.39		$ 0.14
Weighted average shares of Class A common stock:
Basic	37,920,452		31,768,406
Diluted	37,963,930		31,811,315

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Accounts Receivable, Net

9 Months Ended

Sep. 26, 2015

Accounts Receivable, Net

5. ACCOUNTS RECEIVABLE, NET

Accounts receivable, net consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26, 2015			December 27, 2014
Trade accounts receivable	$	194,235		$	131,060
Retention receivables		13,396			12,053
Receivables from related parties		705			333
Accounts receivable		208,336			143,446
Less: Allowance for doubtful accounts		(2,397	)		(2,144	)
Accounts receivable, net	$	205,939		$	141,302

Retention receivables are amounts earned by the Company but held by customers until paving and related service contracts and projects are near completion or fully completed. Amounts are expected to be billed and collected within one year.

Summit Materials, LLC [Member]

Accounts Receivable, Net

5. ACCOUNTS RECEIVABLE, NET

Accounts receivable, net consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,			December 27,
	2015			2014
Trade accounts receivable	$	194,235		$	131,060
Retention receivables		13,396			12,053
Receivables from related parties		705			333
Accounts receivable		208,336			143,446
Less: Allowance for doubtful accounts		(2,397	)		(2,144	)
Accounts receivable, net	$	205,939		$	141,302

Retention receivables are amounts earned by the Company but held by customers until paving and related service contracts and projects are near completion or fully completed. Amounts are expected to be billed and collected within one year.

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Goodwill

9 Months Ended

Sep. 26, 2015

Goodwill

4. GOODWILL

Changes in the carrying amount of goodwill, by reportable segment, from December 27, 2014 to September 26, 2015 are summarized as follows:

	West			Central		East		Total
Balance, December 27, 2014	$	297,085		$	96,025	$	26,160	$	419,270
Acquisitions (1)		4,579			150,929		—		155,508
Foreign currency translation adjustments		(6,942	)		—		—		(6,942	)
Balance, September 26, 2015	$	294,722		$	246,954	$	26,160	$	567,836

(1) Includes certain working capital adjustments related to 2014 acquisitions

Summit Materials, LLC [Member]

Goodwill

4. GOODWILL

Changes in the carrying amount of goodwill, by reportable segment, from December 27, 2014 to September 26, 2015 are summarized as follows:

	West			Central		East		Total
Balance, December 27, 2014	$	297,085		$	96,025	$	26,160	$	419,270
Acquisitions (1)		4,579			150,929		—		155,508
Foreign currency translation adjustments		(6,942	)		—		—		(6,942	)
Balance, September 26, 2015	$	294,722		$	246,954	$	26,160	$	567,836

(1) Includes certain working capital adjustments related to 2014 acquisitions

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Guarantor and Non-Guarantor Financial Information

9 Months Ended

Sep. 26, 2015

Summit Materials, LLC [Member]

Guarantor and Non-Guarantor Financial Information

15. GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION

Summit LLC’s domestic wholly-owned subsidiary companies other than Finance Corp. are named as guarantors (collectively, the “Guarantors”) of the 2020 Notes and the 2023 Notes (collectively, the “Senior Notes”). Certain other partially-owned subsidiaries and a non-U.S. entity do not guarantee the Senior Notes (collectively, the “Non-Guarantors”). The Guarantors provide a joint and several, full and unconditional guarantee of the Senior Notes.

There are no significant restrictions on Summit LLC’s ability to obtain funds from any of the Guarantor Subsidiaries in the form of dividends or loans. Additionally, there are no significant restrictions on a Guarantor Subsidiary’s ability to obtain funds from Summit LLC or its direct or indirect subsidiaries.

The following condensed consolidating balance sheets, statements of operations and cash flows are provided for the Issuers, the Wholly-owned Guarantors and the Non-Guarantors. On March 17, 2015, the noncontrolling interests of Continental Cement were purchased resulting in Continental Cement being a wholly-owned indirect subsidiary of Summit LLC. Continental Cement’s results of operations and cash flows are reflected with the Guarantors for the three and nine months ended September 26, 2015. In 2014, Continental Cement’s results are shown separately as a Non Wholly-owned Guarantor.

Earnings from subsidiaries are included in other income in the condensed consolidated statements of operations below. The financial information may not necessarily be indicative of the financial position, results of operations or cash flows had the guarantor or non-guarantor subsidiaries operated as independent entities.

Condensed Consolidating Balance Sheets

September 26, 2015

	Issuers		Wholly- owned Guarantors		Non- Guarantors		Eliminations			Consolidated
Assets
Current assets:
Cash and cash equivalents	$	8,989	$	1,025	$	8,130	$	(12,662	)	$	5,482
Accounts receivable, net		—		195,120		11,163		(344	)		205,939
Intercompany receivables		1,322,050		14,869		8,996		(1,345,915	)		—
Cost and estimated earnings in excess of billings		—		33,447		728		—			34,175
Inventories		—		132,734		5,302		—			138,036
Other current assets		1,088		19,319		1,355		—			21,762
Total current assets		1,332,127		396,514		35,674		(1,358,921	)		405,394
Property, plant and equipment, net		9,433		1,240,126		26,668		—			1,276,227
Goodwill		—		519,759		48,077		—			567,836
Intangible assets, net		—		14,044		1,437		—			15,481
Other assets		881,923		132,532		1,271		(963,928	)		51,798
Total assets	$	2,223,483	$	2,302,975	$	113,127	$	(2,322,849	)	$	2,316,736
Liabilities, Redeemable Noncontrolling Interest and Member’s Interest
Current liabilities:
Current portion of debt	$	68,125	$	—	$	—	$	—		$	68,125
Current portion of acquisition-related liabilities		—		17,691		—		—			17,691
Accounts payable		7,436		102,571		3,563		(344	)		113,226
Accrued expenses		30,998		70,386		2,158		(12,662	)		90,880
Intercompany payables		67,671		1,274,510		3,734		(1,345,915	)		—
Billings in excess of costs and estimated earnings		—		10,983		22		—			11,005
Total current liabilities		174,230		1,476,141		9,477		(1,358,921	)		300,927
Long-term debt		1,148,068		61,377		—		(61,377	)		1,148,068
Acquisition-related liabilities		—		33,320		—		—			33,320
Other noncurrent liabilities		1,558		110,856		57,268		(55,107	)		114,575
Total liabilities		1,323,856		1,681,694		66,745		(1,475,405	)		1,596,890
Redeemable noncontrolling interest		—		—		—		—			—
Redeemable members’ interest		—		—		—		—			—
Total stockholders’ equity/partners’ interest		899,627		621,281		46,382		(847,444	)		719,846
Total liabilities, redeemable noncontrolling interest and member’s interest	$	2,223,483	$	2,302,975	$	113,127	$	(2,322,849	)	$	2,316,736

Condensed Consolidating Balance Sheets

December 27, 2014

	Issuers		Non- Wholly- owned Guarantor		Wholly- owned Guarantors		Non- Guarantors		Elim- inations			Consol- idated
Assets
Current assets:
Cash and cash equivalents	$	10,837	$	2	$	695	$	8,793	$	(7,112	)	$	13,215
Accounts receivable, net		1		6,629		124,380		11,525		(1,233	)		141,302
Intercompany receivables		376,344		4,095		30,539		4,052		(415,030	)		—
Cost and estimated earnings in excess of billings		—		—		9,819		355		—			10,174
Inventories		—		8,696		98,188		4,669		—			111,553
Other current assets		7,148		464		9,638		1,775		(1,853	)		17,172
Total current assets		394,330		19,886		273,259		31,169		(425,228	)		293,416
Property, plant and equipment, net		7,035		302,524		610,717		30,325		—			950,601
Goodwill		—		23,124		340,969		55,177		—			419,270
Intangible assets, net		—		542		14,245		2,860		—			17,647
Other assets		1,153,204		25,233		125,462		1,362		(1,256,418	)		48,843
Total assets	$	1,554,569	$	371,309	$	1,364,652	$	120,893	$	(1,681,646	)	$	1,729,777
Liabilities, Redeemable Noncontrolling Interest and Member’s Interest
Current liabilities:
Current portion of debt	$	5,275	$	1,273	$	3,990	$	—	$	(5,263	)	$	5,275
Current portion of acquisition-related liabilities		166		—		18,236		—		—			18,402
Accounts payable		3,655		6,845		65,018		4,569		(1,233	)		78,854
Accrued expenses		37,101		10,178		59,477		3,705		(8,965	)		101,496
Intercompany payables		162,728		4,052		245,416		2,834		(415,030	)		—
Billings in excess of costs and estimated earnings		—		—		8,931		27		—			8,958
Total current liabilities		208,925		22,348		401,068		11,135		(430,491	)		212,985
Long-term debt		1,059,642		153,318		480,599		—		(633,917	)		1,059,642
Acquisition-related liabilities		—		—		42,736		—		—			42,736
Other noncurrent liabilities		796		24,787		65,479		57,736		(55,107	)		93,691
Total liabilities		1,269,363		200,453		989,882		68,871		(1,119,515	)		1,409,054
Redeemable noncontrolling interest		—		—		—		—		33,740			33,740
Redeemable members’ interest		—		34,543		—		—		(34,543	)		—
Total stockholders’ equity/partners’ interest		285,206		136,313		374,770		52,022		(561,328	)		286,983
Total liabilities, redeemable noncontrolling interest and member’s interest	$	1,554,569	$	371,309	$	1,364,652	$	120,893	$	(1,681,646	)	$	1,729,777

Condensed Consolidating Statements of Operations

For the three months ended September 26, 2015

	Issuers			Wholly- owned Guarantors			Non- Guarantors			Eliminations			Consolidated
Revenue	$	—		$	454,501		$	21,472		$	(4,068	)	$	471,905
Cost of revenue (excluding items shown separately below)		—			304,204			12,263			(4,068	)		312,399
General and administrative expenses		8,881			32,362			1,600			—			42,843
Depreciation, depletion, amortization and accretion		628			31,374			1,304			—			33,306
Operating (loss) income		(9,509	)		86,561			6,305			—			83,357
Other (income) expense, net		(58,666	)		3,639			(17	)		86,514			31,470
Interest expense		15,046			15,286			900			(10,796	)		20,436
Income from continuing operations before taxes		34,111			67,636			5,422			(75,718	)		31,451
Income tax benefit (expense)		—			(2,690	)		35			—			(2,655	)
Income from continuing operations		34,111			70,326			5,387			(75,718	)		34,106
Income from discontinued operations		—			(57	)		—			—			(57	)
Net income		34,111			70,383			5,387			(75,718	)		34,163
Net income attributable to minority interest		—			—			—			52			52
Net income attributable to member of Summit Materials, LLC	$	34,111		$	70,383		$	5,387		$	(75,770	)	$	34,111
Comprehensive income attributable to member of Summit Materials, LLC	$	26,805		$	69,373		$	(909	)	$	(68,464	)	$	26,805

Condensed Consolidating Statements of Operations

For the three months ended September 27, 2014

	Issuers			Non- Wholly- owned Guarantor			Wholly- owned Guarantors			Non- Guarantors			Elim- inations			Consol- idated
Revenue	$	—		$	34,171		$	348,785		$	22,626		$	(10,823	)	$	394,759
Cost of revenue (excluding items shown separately below)		—			25,603			253,284			17,433			(10,823	)		285,497
General and administrative expenses		8,694			1,651			27,418			495			—			38,258
Depreciation, depletion, amortization and accretion		406			3,708			18,618			523			—			23,255
Operating (loss) income		(9,100	)		3,209			49,465			4,175			—			47,749
Other (income) expense, net		(43,887	)		(945	)		(2,679	)		(16	)		46,119			(1,408	)
Interest expense		7,913			2,931			13,416			233			(2,408	)		22,085
Income from continuing operations before taxes		26,874			1,223			38,728			3,958			(43,711	)		27,072
Income tax benefit (expense)		—			—			(1,038	)		—			—			(1,038	)
Income from continuing operations		26,874			1,223			39,766			3,958			(43,711	)		28,110
Income from discontinued operations		—			—			(7	)		—			—			(7	)
Net income		26,874			1,223			39,773			3,958			(43,711	)		28,117
Net income attributable to minority interest		—			—			—			—			1,243			1,243
Net income attributable to member of Summit Materials, LLC	$	26,874		$	1,223		$	39,773		$	3,958		$	(44,954	)	$	26,874
Comprehensive income attributable to member of Summit Materials, LLC	$	25,110		$	1,223		$	39,773		$	2,194		$	(43,190	)	$	25,110

Condensed Consolidating Statements of Operations

For the nine months ended September 26, 2015

	Issuers			Wholly- owned Guarantors			Non- Guarantors		Eliminations			Consolidated
Revenue	$	—		$	980,153		$	78,821	$	(28,139	)	$	1,030,835
Cost of revenue (excluding items shown separately below)		—			696,068			51,909		(28,139	)		719,838
General and administrative expenses		61,634			90,959			4,935		—			157,528
Depreciation, depletion, amortization and accretion		1,686			80,997			4,135		—			86,818
Operating (loss) income		(63,320	)		112,129			17,842		—			66,651
Other (income) expense, net		(55,083	)		7,140			142		111,436			63,635
Interest expense		35,196			45,332			2,689		(21,568	)		61,649
Income from continuing operations before taxes		(43,433	)		59,657			15,011		(89,868	)		(58,633	)
Income tax benefit (expense)		—			(12,852	)		384		—			(12,468	)
Income from continuing operations		(43,433	)		72,509			14,627		(89,868	)		(46,165	)
Income from discontinued operations		—			(815	)		—		—			(815	)
Net income		(43,433	)		73,324			14,627		(89,868	)		(45,350	)
Net income attributable to minority interest		—			—			—		(1,917	)		(1,917	)
Net income attributable to member of Summit Materials, LLC	$	(43,433	)	$	73,324		$	14,627	$	(87,951	)	$	(43,433	)
Comprehensive income attributable to member of Summit Materials, LLC	$	(55,974	)	$	72,314		$	3,096	$	(75,410	)	$	(55,974	)

Condensed Consolidating Statements of Operations

For the nine months ended September 27, 2014

	Issuers			Non- Wholly- owned Guarantor			Wholly- owned Guarantors			Non- Guarantors		Elim- inations			Consol- idated
Revenue	$	—		$	69,435		$	776,502		$	43,900	$	(19,692	)	$	870,145
Cost of revenue (excluding items shown separately below)		—			53,229			581,602			30,795		(19,692	)		645,934
General and administrative expenses		26,384			5,225			80,938			1,062		—			113,609
Depreciation, depletion, amortization and accretion		1,047			10,484			51,351			1,068		—			63,950
Operating (loss) income		(27,431	)		497			62,611			10,975		—			46,652
Other expense (income), net		(36,161	)		(2,303	)		(4,233	)		29		40,369			(2,299	)
Interest expense		21,581			8,788			37,831			289		(5,934	)		62,555
(Loss) income from continuing operations before taxes		(12,851	)		(5,988	)		29,013			10,657		(34,435	)		(13,604	)
Income tax benefit		(1,427	)		—			(1,071	)		—		—			(2,498	)
(Loss) income from continuing operations		(11,424	)		(5,988	)		30,084			10,657		(34,435	)		(11,106	)
Income from discontinued operations		—			—			(356	)		—		—			(356	)
Net (loss) income		(11,424	)		(5,988	)		30,440			10,657		(34,435	)		(10,750	)
Net loss attributable to noncontrolling interest		—			—			—			—		674			674
Net (loss) income attributable to member of Summit Materials, LLC	$	(11,424	)	$	(5,988	)	$	30,440		$	10,657	$	(35,109	)	$	(11,424	)
Comprehensive (loss) income attributable to member of Summit Materials, LLC	$	(12,615	)		(5,170	)	$	30,440		$	8,893	$	(34,163	)	$	(12,615	)

Condensed Consolidating Statements of Cash Flows

For the nine months ended September 26, 2015

	Issuers			Wholly- owned Guarantors			Non- Guarantors			Elim- inations			Consol- idated
Net cash (used in) provided by operating activities	$	(140,504	)	$	112,541		$	9,203		$	(167	)	$	(18,927	)
Cash flow from investing activities:
Acquisitions, net of cash acquired		—			(505,466	)		—			—			(505,466	)
Purchase of property, plant and equipment		(3,743	)		(65,001	)		(928	)		—			(69,672	)
Proceeds from the sale of property, plant, and equipment		—			8,821			62			—			8,883
Other		—			610			—			—			610
Net cash used for investing activities		(3,743	)		(561,036	)		(866	)		—			(565,645	)
Cash flow from financing activities:
Proceeds from investment by member		490,916			—			—			—			490,916
Capital issuance costs		(12,539	)		—			—			—			(12,539	)
Net proceeds from debt issuance		1,415,750			—			—			—			1,415,750
Loans received from and payments made on loans from other Summit Companies		(1,031,576	)		1,047,015			(9,000	)		(6,439	)		—
Payments on long-term debt		(669,123	)		(583,340	)		—			1,056			(1,251,407	)
Payments on acquisition-related liabilities		(166	)		(14,852	)		—			—			(15,018	)
Financing costs		(10,911	)		—			—			—			(10,911	)
Distributions from partnership		(39,952	)		—			—			—			(39,952	)
Other		—			—			—			—			—
Net cash provided by (used for) financing activities		142,399			448,823			(9,000	)		(5,383	)		576,839
Net increase (decrease) in cash		(1,848	)		328			(663	)		(5,550	)		(7,733	)
Cash — Beginning of period		10,837			697			8,793			(7,112	)		13,215
Cash— End of period	$	8,989		$	1,025		$	8,130		$	(12,662	)	$	5,482

Condensed Consolidating Statements of Cash Flows

For the nine months ended September 27, 2014

	Issuers			Non- Wholly- owned Guarantor			Wholly- owned Guarantors			Non- Guarantors			Elim- inations			Consol- idated
Net cash used in operating activities	$	(36,504	)	$	(2,408	)	$	28,727		$	668		$	(1,319	)	$	(10,836	)
Cash flow from investing activities:
Acquisitions, net of cash acquired		(181,754	)		—			(170,187	)		—			—			(351,941	)
Purchase of property, plant and equipment		(3,674	)		(13,472	)		(46,575	)		(523	)		—			(64,244	)
Proceeds from the sale of property, plant, and equipment		—			—			9,345			230			—			9,575
Other		—			—			(409	)		—			1,166			757
Net cash (used for) provided by investing activities		(185,428	)		(13,472	)		(207,826	)		(293	)		1,166			(405,853	)
Cash flow from financing activities:
Proceeds from investment by member		24,350			—			—			1,353			(1,353	)		24,350
Net proceeds from debt issuance		657,217			—			—			—			—			657,217
Loans received from and payments made on loans from other Summit Companies		(195,590	)		16,383			189,243			(2,113	)		(7,923	)		—
Payments on long-term debt		(251,062	)		(509	)		(6,766	)		—			—			(258,337	)
Payments on acquisition-related liabilities		(1,500	)		—			(4,307	)		—			—			(5,807	)
Financing costs		(8,834	)		—			—			—			—			(8,834	)
Other		(88	)		—			(1,500	)		—			1,500			(88	)
Net cash provided by (used for) financing activities		224,493			15,874			176,670			(760	)		(7,776	)		408,501
Net increase (decrease) in cash		2,561			(6	)		(2,429	)		(385	)		(7,929	)		(8,188	)
Cash — Beginning of period		10,375			9			3,442			3,631			(2,540	)		14,917
Cash— End of period	$	12,936		$	3		$	1,013		$	3,246		$	(10,469	)	$	6,729

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Commitments and Contingencies

9 Months Ended

Sep. 26, 2015

Commitments and Contingencies

12. COMMITMENTS AND CONTINGENCIES

The Company is party to certain legal actions arising from the ordinary course of business activities. Accruals are recorded when the outcome is probable and can be reasonably estimated. While the ultimate results of claims and litigation cannot be predicted with certainty, management expects that the ultimate resolution of all pending or threatened claims and litigation will not have a material effect on the Company’s consolidated results of operations, financial position or liquidity. The Company records legal fees as incurred.

Litigation and Claims—The Company is obligated under an indemnification agreement entered into with the sellers of Harper Contracting, Inc., Harper Sand and Gravel, Inc., Harper Excavating, Inc., Harper Ready Mix Company, Inc. and Harper Investments, Inc. (collectively, “Harper”) for the sellers’ 40% ownership interests in a joint venture agreement. The Company has the rights to any benefits under the joint venture as well as the assumption of any obligations, but does not own equity interests in the joint venture. The joint venture incurred significant losses on a highway project in Utah, which resulted in requests for funding from the joint venture partners and, ultimately, from the Company. Through September 26, 2015, the Company has funded $8.8 million, of which $4.0 million was funded in 2012 and $4.8 million was funded in 2011. On April 2, 2015, the Utah Department of Transportation filed suit in the Fourth District Court of Utah County, Utah against the joint venture and the parties to the joint venture seeking damages of at least $29.4 million. As of September 26, 2015 and December 27, 2014, an accrual of $4.3 million was recorded in other noncurrent liabilities as management’s best estimate of loss related to this matter.

During the ordinary course of business, there may be revisions to project costs and conditions that can give rise to change orders on construction contracts. Revisions can also result in claims made against a customer or subcontractor to recover project variances that have not been satisfactorily addressed through change orders with a customer. The Company had unapproved change orders and claims of $1.2 million in accounts receivable and $3.9 million ($1.2 million in accounts receivable, $0.5 million in costs and estimated earnings in excess of billings and $2.2 million in other assets) as of September 26, 2015 and December 27, 2014, respectively.

Environmental Remediation—The Company’s operations are subject to and affected by federal, state, provincial and local laws and regulations relating to the environment, health and safety and other regulatory matters. These operations require environmental operating permits, which are subject to modification, renewal and revocation. The Company regularly monitors and reviews its operations, procedures and policies for compliance with these laws and regulations. Despite these compliance efforts, risk of environmental liability is inherent in the operation of the Company’s business, as it is with other companies engaged in similar businesses, and there can be no assurance that environmental liabilities or noncompliance will not have a material adverse effect on the Company’s consolidated financial position, results of operations or liquidity in the future.

Other — In the ordinary course of business, the Company enters into various firm purchase commitments for certain raw materials and services. The terms of the firm purchase commitments are generally less than one year. Management does not expect any significant changes in the market value of these goods and services during the commitment period that would have a material adverse effect on the financial position, results of operations or liquidity of the Company.

Summit Materials, LLC [Member]

Commitments and Contingencies

11. COMMITMENTS AND CONTINGENCIES

The Company is party to certain legal actions arising from the ordinary course of business activities. Accruals are recorded when the outcome is probable and can be reasonably estimated. While the ultimate results of claims and litigation cannot be predicted with certainty, management expects that the ultimate resolution of all pending or threatened claims and litigation will not have a material effect on the Company’s consolidated results of operations, financial position or liquidity. The Company records legal fees as incurred.

Litigation and Claims—The Company is obligated under an indemnification agreement entered into with the sellers of Harper Contracting, Inc., Harper Sand and Gravel, Inc., Harper Excavating, Inc., Harper Ready Mix Company, Inc. and Harper Investments, Inc. (collectively, “Harper”) for the sellers’ 40% ownership interests in a joint venture agreement. The Company has the rights to any benefits under the joint venture as well as the assumption of any obligations, but does not own equity interests in the joint venture. The joint venture incurred significant losses on a highway project in Utah, which resulted in requests for funding from the joint venture partners and, ultimately, from the Company. Through September 26, 2015, the Company has funded $8.8 million, of which $4.0 million was funded in 2012 and $4.8 million was funded in 2011. On April 2, 2015, the Utah Department of Transportation filed suit in the Fourth District Court of Utah County, Utah against the joint venture and the parties to the joint venture seeking damages of at least $29.4 million. As of September 26, 2015 and December 27, 2014, an accrual of $4.3 million was recorded in other noncurrent liabilities as management’s best estimate of loss related to this matter.

During the ordinary course of business, there may be revisions to project costs and conditions that can give rise to change orders on construction contracts. Revisions can also result in claims made against a customer or subcontractor to recover project variances that have not been satisfactorily addressed through change orders with a customer. The Company had unapproved change orders and claims of $1.2 million in accounts receivable and $3.9 million ($1.2 million in accounts receivable, $0.5 million in costs and estimated earnings in excess of billings and $2.2 million in other assets) as of September 26, 2015 and December 27, 2014, respectively.

Environmental Remediation—The Company’s operations are subject to and affected by federal, state, provincial and local laws and regulations relating to the environment, health and safety and other regulatory matters. These operations require environmental operating permits, which are subject to modification, renewal and revocation. The Company regularly monitors and reviews its operations, procedures and policies for compliance with these laws and regulations. Despite these compliance efforts, risk of environmental liability is inherent in the operation of the Company’s business, as it is with other companies engaged in similar businesses, and there can be no assurance that environmental liabilities or noncompliance will not have a material adverse effect on the Company’s consolidated financial position, results of operations or liquidity in the future.

Other—In the ordinary course of business, the Company enters into various firm purchase commitments for certain raw materials and services. The terms of the firm purchase commitments are generally less than one year. Management does not expect any significant changes in the market value of these goods and services during the commitment period that would have a material adverse effect on the financial position, results of operations or liquidity of the Company.

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Debt

9 Months Ended

Sep. 26, 2015

Debt

8. DEBT

Debt consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26, 2015		December 27, 2014
Revolving credit facility	$	60,000	$	—
Long-term debt:
10 1/2% Senior Notes, due 2020:
$153.8 million senior notes, including a $5.5 million net premium at September 26, 2015 and $625.0 million senior notes, including a $26.5 million net premium at December 27, 2014		159,365		651,548
6 1/8% Senior Notes, due 2023:
$350.0 million senior notes, issued at par at September 26, 2015		350,000
Term Loan, due 2022:
$650.0 million term loan, net of $3.1 million discount at September 26, 2015 and $415.7 million term loan, net of $2.3 million discount at December 27, 2014		646,828		413,369
Total		1,156,193		1,064,917
Current portion of long-term debt		8,125		5,275
Long-term debt	$	1,148,068	$	1,059,642

The contractual payments of long-term debt, including current maturities, for the five years subsequent to September 26, 2015, are as follows:

2015 (three months)	$	3,250
2016		6,500
2017		6,500
2018		4,875
2019		6,500
2020		161,925
Thereafter		964,250
Total		1,153,800
Plus: Original issue net premium		2,393
Total debt	$	1,156,193

Senior Notes—The 2020 Notes were issued under an indenture dated January 30, 2012 (as amended and supplemented, the “2012 Indenture”) by Summit Materials, LLC (“Summit LLC”) and Summit Materials Finance Corp. (collectively, the “Issuers”). The Indenture contains covenants limiting, among other things, Summit LLC and its restricted subsidiaries’ ability to incur additional indebtedness or issue certain preferred shares, pay dividends, redeem stock or make other distributions, make certain investments, sell or transfer certain assets, create liens, consolidate, merge, sell or otherwise dispose of all or substantially all of the Company’s assets, enter into certain transactions with affiliates, and designate subsidiaries as unrestricted subsidiaries. The 2012 Indenture also contains customary events of default. Interest on the 2020 Notes is payable semi-annually in arrears. On September 8, 2014 and January 17, 2014, the Issuers issued an additional $115.0 million and $260.0 million, respectively, aggregate principal amount of 2020 Notes (the “Additional Notes”), receiving proceeds of $409.3 million, before payment of fees and expenses and including an aggregate $34.3 million premium. The proceeds from the sale of the Additional Notes were used for the purchases of acquisitions, to make payments on the revolving credit facility and for general corporate purposes. The Additional Notes are treated as a single series with the $250.0 million of 2020 Notes issued in January 2012 (the “Existing Notes”) and have substantially the same terms as those of the Existing Notes. The Additional Notes and the Existing Notes are treated as one class under the 2012 Indenture.

The Issuers issued $350.0 million in aggregate principal amount of 6.125% senior notes due July 15, 2023 (the “2023 Notes”) under an indenture dated July 28, 2015 (as amended and supplemented, the “2015 Indenture”). The net proceeds from the 2023 Notes, with proceeds from the refinancing of the term loan described below, were used to pay the $370.0 million initial purchase price for the Davenport Assets and to redeem $183.0 million aggregate principal amount of the 2020 Notes and pay related fees and expenses. The 2015 Indenture contains covenants and events of default generally consistent with the 2012 Indenture. The 2023 Notes were issued at 100% of their par value. Interest on the 2023 Notes is payable semi-annually in arrears on January 15 and July 15 of each year commencing on January 15, 2016. As of September 26, 2015 and December 27, 2014, the Company was in compliance with all covenants under both indentures, as applicable.

In April and August 2015, using proceeds from the IPO and the refinancing of the term loan described below, $288.2 million and $183.0 million, respectively, aggregate principal amount of the outstanding 2020 Notes were redeemed at a price equal to par plus an applicable premium. As a result of the redemptions, net charges of $14.1 million and $45.4 million were recognized in the three and nine months ended September 26, 2015, respectively. The fees included $18.2 million and $56.4 million for the applicable prepayment premium and $2.8 million and $7.5 million for the write-off of deferred financing fees, partially offset by $6.9 million and $18.5 million of net benefit from the write-off of the original issuance net premium in the three and nine months ended September 26, 2015, respectively.

Senior Secured Credit Facilities—Summit LLC has credit facilities that provide for term loans in an aggregate amount of $650.0 million and revolving credit commitments in an aggregate amount of $235.0 million (the “Senior Secured Credit Facilities”). Under the Senior Secured Credit Facilities, required principal repayments of 0.25% of term debt are due on the last business day of each March, June, September and December. The unpaid principal balance is due in full on the maturity date, which is July 17, 2022.

On July 17, 2015, Summit LLC refinanced its term loan under the Senior Secured Credit Facilities (the “Refinancing”). The Refinancing, among other things: (i) reduced the applicable margins used to calculate interest rates for term loans under our Senior Secured Credit Facilities to 3.25% for LIBOR rate loans and 2.25% for base rate loans, subject to a LIBOR floor of 1.00% (and one 25 basis point step down upon Summit LLC achieving a certain first lien net leverage ratio); (ii) increased term loans borrowed under our term loan facility from $422.0 million to an aggregate $650.0 million; and (iii) created additional flexibility under the financial maintenance covenants, which are tested quarterly, by increasing the applicable maximum Consolidated First Lien Net Leverage Ratio (as defined in the credit agreement governing the Senior Secured Credit Facilities).

On March 11, 2015, Summit LLC entered into Amendment No. 3 to the credit agreement governing the Senior Secured Credit Facilities, which became effective on March 17, 2015 upon the consummation of the IPO. The amendment: (i) increased the size of the revolving credit facility from $150.0 million to $235.0 million; (ii) extended the maturity date of the revolving credit facility to March 11, 2020; (iii) amended certain covenants; and (iv) permits periodic tax distributions as contemplated in a tax receivable agreement, dated as of March 11, 2015, with Summit Holdings. As a result of this amendment, a charge of $0.4 million of deferred financing was recognized in the nine months ended September 26, 2015.

The revolving credit facility bears interest per annum equal to, at Summit LLC’s option, either (i) a base rate determined by reference to the highest of (a) the federal funds rate plus 0.50%, (b) the prime rate of Bank of America, N.A. and (c) LIBOR plus 1.00%, plus an applicable margin of 2.0% for base rate loans or (ii) a LIBOR rate determined by reference to Reuters prior to the interest period relevant to such borrowing adjusted for certain additional costs plus an applicable margin of 3.0% for LIBOR rate loans. The interest rate in effect at September 26, 2015 was 3.2%.

There were $60.0 million of outstanding borrowings under the revolving credit facility as of September 26, 2015, leaving remaining borrowing capacity of $150.6 million, which is net of $24.4 million of outstanding letters of credit. The outstanding letters of credit are renewed annually and support required bonding on construction projects and the Company’s insurance liabilities.

Summit LLC’s Consolidated First Lien Net Leverage Ratio, as such term is defined in the Senior Secured Credit Facilities, should be no greater than 4.75:1.0 as of each quarter-end. As of September 26, 2015 and December 27, 2014, Summit LLC was in compliance with all covenants.

Summit LLC’s wholly-owned domestic subsidiary companies, subject to certain exclusions and exceptions, are named as subsidiary guarantors of the 2020 Notes, the 2023 Notes and the Senior Secured Credit Facilities. In addition, Summit LLC has pledged substantially all of its assets as collateral, subject to certain exclusions and exceptions, for the Senior Secured Credit Facilities.

Interest expense related to debt totaled $17.8 million and $54.6 million in the three and nine months ended September 26, 2015, respectively, and $19.9 million and $56.4 million in the three and nine months ended September 27, 2014, respectively. The following table presents the activity for the deferred financing fees for the nine months ended September 26, 2015 and September 27, 2014:

	Deferred financing fees
Balance — December 27, 2014	$	17,215
Loan origination fees		10,911
Amortization		(2,731	)
Write off of deferred financing fees		(12,135	)
Balance — September 26, 2015	$	13,260
Balance — December 28, 2013	$	11,485
Loan origination fees		9,281
Amortization		(2,875	)
Balance —September 27, 2014	$	17,891

Other—On January 15, 2015, the Company’s wholly-owned subsidiary in British Columbia, Canada entered into an agreement with HSBC for a (i) $6.0 million Canadian dollar (“CAD”) revolving credit commitment to be used for operating activities that bears interest per annum equal to the bank’s prime rate plus 0.20%, (ii) $0.5 million CAD revolving credit commitment to be used for capital equipment that bears interest per annum at the bank’s prime rate plus 0.90% and (iii) $0.4 million CAD revolving credit commitment to provide guarantees on behalf of that subsidiary. There were no amounts outstanding under this agreement as of September 26, 2015.

Summit Materials, LLC [Member]

Debt

8. DEBT

Debt consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,		December 27,
	2015		2014
Revolving credit facility	$	60,000	$	—
Long-term debt:
10 1/2% Senior Notes, due 2020:
$153.8 million senior notes, including a $5.5 million net premium at September 26, 2015 and $625.0 million senior notes, including a $26.5 million net premium at December 27, 2014		159,365		651,548
6 1/8% Senior Notes, due 2023:
$350.0 million senior notes, issued at par at September 26, 2015		350,000
Term Loan, due 2022:
$650.0 million term loan, net of $3.1 million discount at September 26, 2015 and $415.7 million term loan, net of $2.3 million discount at December 27, 2014		646,828		413,369
Total		1,156,193		1,064,917
Current portion of long-term debt		8,125		5,275
Long-term debt	$	1,148,068	$	1,059,642

The contractual payments of long-term debt, including current maturities, for the five years subsequent to September 26, 2015, are as follows:

2015 (three months)	$	3,250
2016		6,500
2017		6,500
2018		4,875
2019		6,500
2020		161,925
Thereafter		964,250
Total		1,153,800
Plus: Original issue net premium		2,393
Total debt	$	1,156,193

Senior Notes—The 2020 Notes were issued under an indenture dated January 30, 2012 (as amended and supplemented, the “2012 Indenture”) by Summit LLC and Summit Materials Finance Corp. (collectively, the “Issuers”). The Indenture contains covenants limiting, among other things, Summit LLC and its restricted subsidiaries’ ability to incur additional indebtedness or issue certain preferred shares, pay dividends, redeem stock or make other distributions, make certain investments, sell or transfer certain assets, create liens, consolidate, merge, sell or otherwise dispose of all or substantially all of the Company’s assets, enter into certain transactions with affiliates, and designate subsidiaries as unrestricted subsidiaries. The 2012 Indenture also contains customary events of default. Interest on the 2020 Notes is payable semi-annually in arrears. On September 8, 2014 and January 17, 2014, the Issuers issued an additional $115.0 million and $260.0 million, respectively, aggregate principal amount of 2020 Notes (the “Additional Notes”), receiving proceeds of $409.3 million, before payment of fees and expenses and including an aggregate $34.3 million premium. The proceeds from the sale of the Additional Notes were used for the purchases of acquisitions, to make payments on the revolving credit facility and for general corporate purposes. The Additional Notes are treated as a single series with the $250.0 million of 2020 Notes issued in January 2012 (the “Existing Notes”) and have substantially the same terms as those of the Existing Notes. The Additional Notes and the Existing Notes are treated as one class under the 2012 Indenture.

The Issuers issued $350.0 million in aggregate principal amount of 6.125% senior notes due July 15, 2023 (the “2023 Notes”) under an indenture dated July 28, 2015 (as amended and supplemented, the “2015 Indenture”). The net proceeds from the 2023 Notes, with proceeds from the refinancing of the term loan described below, were used to pay the $370.0 million initial purchase price for the Davenport Assets and to redeem $183.0 million aggregate principal amount of the 2020 Notes and pay related fees and expenses. The 2015 Indenture contains covenants and events of default generally consistent with the 2012 Indenture. The 2023 Notes were issued at 100% of their par value. Interest on the 2023 Notes is payable semi-annually in arrears on January 15 and July 15 of each year commencing on January 15, 2016. As of September 26, 2015 and December 27, 2014, the Company was in compliance with all covenants under both indentures, as applicable.

In April and August 2015, using proceeds from the IPO and the refinancing of the term loan described below, $288.2 million and $183.0 million, respectively, aggregate principal amount of the outstanding 2020 Notes were redeemed at a price equal to par plus an applicable premium. As a result of the redemptions, net charges of $14.1 million and $45.4 million were recognized in the three and nine months ended September 26, 2015, respectively. The fees included $18.2 million and $56.4 million for the applicable prepayment premium and $2.8 million and $7.5 million for the write-off of deferred financing fees, partially offset by $6.9 million and $18.5 million of net benefit from the write-off of the original issuance net premium in the three and nine months ended September 26, 2015, respectively.

Senior Secured Credit Facilities— Summit LLC has credit facilities that provide for term loans in an aggregate amount of $650.0 million and revolving credit commitments in an aggregate amount of $235.0 million (the “Senior Secured Credit Facilities”). Under the Senior Secured Credit Facilities, required principal repayments of 0.25% of term debt are due on the last business day of each March, June, September and December. The unpaid principal balance is due in full on the maturity date, which is July 17, 2022.

On July 17, 2015, Summit LLC refinanced its term loan under the Senior Secured Credit Facilities (the “Refinancing”). The Refinancing, among other things: (i) reduced the applicable margins used to calculate interest rates for term loans under our Senior Secured Credit Facilities to 3.25% for LIBOR rate loans and 2.25% for base rate loans, subject to a LIBOR floor of 1.00% (and one 25 basis point step down upon Summit LLC achieving a certain first lien net leverage ratio); (ii) increased term loans borrowed under our term loan facility from $422.0 million to an aggregate $650.0 million; and (iii) created additional flexibility under the financial maintenance covenants, which are tested quarterly, by increasing the applicable maximum Consolidated First Lien Net Leverage Ratio (as defined in the credit agreement governing the Senior Secured Credit Facilities).

On March 11, 2015, Summit LLC entered into Amendment No. 3 to the credit agreement governing the Senior Secured Credit Facilities, which became effective on March 17, 2015 upon the consummation of the IPO. The amendment: (i) increased the size of the revolving credit facility from $150.0 million to $235.0 million; (ii) extended the maturity date of the revolving credit facility to March 11, 2020; (iii) amended certain covenants; and (iv) permits periodic tax distributions as contemplated in a tax receivable agreement, dated as of March 11, 2015, with Summit Holdings. As a result of this amendment, a charge of $0.4 million of deferred financing was recognized in the nine months ended September 26, 2015.

The revolving credit facility bears interest per annum equal to, at Summit LLC’s option, either (i) a base rate determined by reference to the highest of (a) the federal funds rate plus 0.50%, (b) the prime rate of Bank of America, N.A. and (c) LIBOR plus 1.00%, plus an applicable margin of 2.5% for base rate loans or (ii) a LIBOR rate determined by reference to Reuters prior to the interest period relevant to such borrowing adjusted for certain additional costs plus an applicable margin of 3.5% for LIBOR rate loans. The interest rate in effect at September 26, 2015 was 3.6%.

There were $60.0 million of outstanding borrowings under the revolving credit facility as of September 26, 2015, leaving remaining borrowing capacity of $150.6 million, which is net of $24.4 million of outstanding letters of credit. The outstanding letters of credit are renewed annually and support required bonding on construction projects and the Company’s insurance liabilities.

Summit LLC’s Consolidated First Lien Net Leverage Ratio, as such term is defined in the Senior Secured Credit Facilities, should be no greater than 4.75:1.0 as of each quarter-end. As of September 26, 2015 and December 27, 2014, Summit LLC was in compliance with all covenants.

Summit LLC’s wholly-owned domestic subsidiary companies, subject to certain exclusions and exceptions, are named as subsidiary guarantors of the 2020 Notes, the 2023 Notes and the Senior Secured Credit Facilities. In addition, Summit LLC has pledged substantially all of its assets as collateral, subject to certain exclusions and exceptions, for the Senior Secured Credit Facilities.

Interest expense related to debt totaled $17.8 million and $54.6 million in the three and nine months ended September 26, 2015, respectively, and $19.9 million and $56.4 million in the three and nine months ended September 27, 2014, respectively. The

following table presents the activity for the deferred financing fees for the nine months ended September 26, 2015 and September 27, 2014:

	Deferred financing fees
Balance — December 27, 2014	$	17,215
Loan origination fees		10,911
Amortization		(2,731	)
Write off of deferred financing fees		(12,135	)
Balance — September 26, 2015	$	13,260
Balance — December 28, 2013	$	11,485
Loan origination fees		9,281
Amortization		(2,875	)
Balance —September 27, 2014	$	17,891

Other—On January 15, 2015, the Company’s wholly-owned subsidiary in British Columbia, Canada entered into an agreement with HSBC for a (i) $6.0 million Canadian dollar (“CAD”) revolving credit commitment to be used for operating activities that bears interest per annum equal to the bank’s prime rate plus 0.20%, (ii) $0.5 million CAD revolving credit commitment to be used for capital equipment that bears interest per annum at the bank’s prime rate plus 0.90% and (iii) $0.4 million CAD revolving credit commitment to provide guarantees on behalf of that subsidiary. There were no amounts outstanding under this agreement as of September 26, 2015.

XML

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions		9 Months Ended	12 Months Ended
	Apr. 02, 2015	Sep. 26, 2015	Dec. 29, 2012	Dec. 31, 2011	Dec. 27, 2014
Loss Contingencies [Line Items]
Percentage of ownership interest in joint venture		40.00%
Amount funded for loss incurred by joint venture		$ 8.8	$ 4.0	$ 4.8
Accrual recorded in other noncurrent liabilities		4.3			$ 4.3
Value of damages sought	$ 29.4
Unapproved change orders and claims					3.9
Unapproved change orders within accounts receivable		$ 1.2			1.2
Unapproved change orders within costs in excess of billings					0.5
Unapproved change orders within other current assets					2.2
Summit Materials, LLC [Member]
Loss Contingencies [Line Items]
Percentage of ownership interest in joint venture		40.00%
Amount funded for loss incurred by joint venture		$ 8.8	$ 4.0	$ 4.8
Accrual recorded in other noncurrent liabilities		4.3			4.3
Value of damages sought	$ 29.4
Unapproved change orders and claims					3.9
Unapproved change orders within accounts receivable		$ 1.2			1.2
Unapproved change orders within costs in excess of billings					0.5
Unapproved change orders within other current assets					$ 2.2
Maximum [Member]
Loss Contingencies [Line Items]
Duration of commitments		1 year
Maximum [Member] | Summit Materials, LLC [Member]
Loss Contingencies [Line Items]
Duration of commitments		1 year

XML

Inventories

9 Months Ended

Sep. 26, 2015

Inventories

6. INVENTORIES

Inventories consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,		December 27,
	2015		2014
Aggregate stockpiles	$	90,776	$	88,211
Finished goods		11,284		8,826
Work in process		6,511		1,801
Raw materials		29,465		12,715
Total	$	138,036	$	111,553

Summit Materials, LLC [Member]

Inventories

6. INVENTORIES

Inventories consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,		December 27,
	2015		2014
Aggregate stockpiles	$	90,776	$	88,211
Finished goods		11,284		8,826
Work in process		6,511		1,801
Raw materials		29,465		12,715
Total	$	138,036	$	111,553

XML

Accrued Expenses

9 Months Ended

Sep. 26, 2015

Accrued Expenses

7. ACCRUED EXPENSES

Accrued expenses consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26, 2015		December 27, 2014
Interest	$	12,973	$	32,475
Payroll and benefits		22,095		20,326
Capital lease obligations		16,065		17,530
Insurance		13,710		11,402
Non-income taxes		10,221		5,520
Professional fees		1,305		3,299
Other (1)		14,511		10,944
Total	$	90,880	$	101,496
(1)    Consists primarily of subcontractor and working capital settlement accruals.

Summit Materials, LLC [Member]

Accrued Expenses

7. ACCRUED EXPENSES

Accrued expenses consisted of the following as of September 26, 2015 and December 27, 2014:

	September 26,		December 27,
	2015		2014
Interest	$	12,973	$	32,475
Payroll and benefits		22,095		20,326
Capital lease obligations		16,065		17,530
Insurance		13,710		11,402
Non-income taxes		10,221		5,520
Professional fees		1,305		3,299
Other (1)		14,511		10,944
Total	$	90,880	$	101,496

(1) Consists primarily of subcontractor and working capital settlement accruals.

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Accumulated Other Comprehensive Loss

9 Months Ended

Sep. 26, 2015

Accumulated Other Comprehensive Loss

9. ACCUMULATED OTHER COMPREHENSIVE LOSS

The changes in each component of accumulated other comprehensive loss consisted of the following:

	Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance — December 27, 2014	$	—		$	—		$	—
Foreign currency translation adjustment		(2,109	)		—			(2,109	)
Loss on cash flow hedges		—			(498	)		(498	)
Balance — September 26, 2015	$	(2,109	)	$	(498	)	$	(2,607	)

Summit Materials, LLC [Member]

Accumulated Other Comprehensive Loss

9. ACCUMULATED OTHER COMPREHENSIVE LOSS

The changes in each component of accumulated other comprehensive loss consisted of the following:

	Change in retirement plans			Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance — December 27, 2014	$	(9,730	)	$	(5,816	)	$	—		$	(15,546	)
Foreign currency translation adjustment		—			(11,531	)		—			(11,531	)
Loss on cash flow hedges		—			—			(1,010	)		(1,010	)
Balance — September 26, 2015	$	(9,730	)	$	(17,347	)	$	(1,010	)	$	(28,087	)
Balance — December 28, 2013	$	(6,045	)	$	—		$	—		$	(6,045	)
Postretirement curtailment adjustment		(942	)		—			—			(942	)
Postretirement liability adjustment		1,515			—			—			1,515
Foreign currency translation adjustment		—			(1,764	)		—			(1,764	)
Balance —September 27, 2014	$	(5,472	)	$	(1,764	)	$	—		$	(7,236	)

XML

Related Party Transactions - Additional Information (Detail)				1 Months Ended		2 Months Ended	3 Months Ended		9 Months Ended
	Sep. 26, 2015 USD ($)	Aug. 13, 2015 USD ($)	Jul. 17, 2015 USD ($) Business	Sep. 30, 2014 USD ($)	Jan. 31, 2014 USD ($)	Mar. 11, 2015 USD ($)	Mar. 17, 2015 USD ($)	Sep. 27, 2014 USD ($)	Sep. 26, 2015 USD ($)	Sep. 27, 2014 USD ($)	Dec. 28, 2014 USD ($)	Dec. 27, 2014 USD ($)
Related Party Transaction [Line Items]
Assets sold to related party										$ 2,300,000
Davenport Acquisition [Member]
Related Party Transaction [Line Items]
Net cash paid for acquisitions	$ 448,710,000		$ 448,710,000
Summit Materials, LLC [Member]
Related Party Transaction [Line Items]
Assets sold to related party										2,300,000
Summit Materials, LLC [Member] | Davenport Acquisition [Member]
Related Party Transaction [Line Items]
Net cash paid for acquisitions	$ 448,710,000		448,710,000
Blackstone Management Partners L.L.C. [Member]
Related Party Transaction [Line Items]
Consideration of Consolidated profit									Greater of $300,000 or 2.0%
Payment for services									$ 300,000
Threshold of annual consolidated profits									2.00%
Management fees incurred							$ 1,000,000	$ 1,300,000		2,300,000
Percentage transaction fee on value of entity acquired									1.00%
Consideration paid / received on assets acquired / disposed	1.00%								1.00%
Transaction fees paid								600,000		2,300,000
Management fee agreement termination date									Mar. 17, 2015
Management fee paid as of termination									$ 13,800,000
Related party transactions				$ 5,750,000	$ 13,000,000
Blackstone Management Partners L.L.C. [Member] | Summit Materials, LLC [Member]
Related Party Transaction [Line Items]
Consideration of Consolidated profit									Greater of $300,000 or 2.0%
Payment for services									$ 300,000
Threshold of annual consolidated profits									2.00%
Management fees incurred							$ 1,000,000	1,300,000		2,300,000
Percentage transaction fee on value of entity acquired									1.00%
Consideration paid / received on assets acquired / disposed	1.00%								1.00%
Transaction fees paid								600,000		2,300,000
Management fee agreement termination date									Mar. 17, 2015
Management fee paid as of termination									$ 13,800,000
Related party transactions				$ 5,750,000	$ 13,000,000
Blackstone and Affiliates [Member]
Related Party Transaction [Line Items]
Management fee paid as of termination									13,400,000
Blackstone and Affiliates [Member] | Summit Materials, LLC [Member]
Related Party Transaction [Line Items]
Management fee paid as of termination									13,400,000
Silverhawk Summit LP [Member]
Related Party Transaction [Line Items]
Management fee paid as of termination									400,000
Silverhawk Summit LP [Member] | Summit Materials, LLC [Member]
Related Party Transaction [Line Items]
Management fee paid as of termination									400,000
Lafarge North America Inc [Member] | Davenport Acquisition [Member]
Related Party Transaction [Line Items]
Net cash paid for acquisitions			$ 448,710,000
Purchase agreement date for assets acquired			Apr. 16, 2015
Purchase price paid	$ 370,000,000	$ 80,000,000
Lafarge North America Inc [Member] | Bettendorf Iowa [Member]
Related Party Transaction [Line Items]
Number of cement distribution terminals acquired | Business			1
Lafarge North America Inc [Member] | Summit Materials, LLC [Member] | Davenport Acquisition [Member]
Related Party Transaction [Line Items]
Net cash paid for acquisitions			$ 448,710,000
Purchase agreement date for assets acquired			Apr. 16, 2015
Purchase price paid	$ 370,000,000	$ 80,000,000
Lafarge North America Inc [Member] | Summit Materials, LLC [Member] | Bettendorf Iowa [Member]
Related Party Transaction [Line Items]
Number of cement distribution terminals acquired | Business			1
Blackstone Capital Partners VI Limited Partnership [Member] | Davenport Acquisition [Member]
Related Party Transaction [Line Items]
Equity commitment financing			$ 90,000,000
Deferred purchase price associated with acquisition			80,000,000
Commitment fee paid									1,800,000
Blackstone Capital Partners VI Limited Partnership [Member] | Summit Materials, LLC [Member] | Davenport Acquisition [Member]
Related Party Transaction [Line Items]
Equity commitment financing			90,000,000
Deferred purchase price associated with acquisition			$ 80,000,000
Commitment fee paid									$ 1,800,000
Continental Cement Company, L.L.C. [Member]
Related Party Transaction [Line Items]
Sales to related parties						$ 1,400,000		4,700,000		10,900,000
Accounts receivables due from related parties											$ 200,000
Non controlling interest owned										700,000
Continental Cement Company, L.L.C. [Member] | Summit Materials, LLC [Member]
Related Party Transaction [Line Items]
Sales to related parties						$ 1,400,000		$ 4,700,000		10,900,000
Accounts receivables due from related parties												$ 200,000
Non controlling interest owned										$ 700,000

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Guarantor and Non-Guarantor Financial Information - Schedule of Condensed Consolidating Statements of Operations (Detail) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended		7 Months Ended	9 Months Ended
	Mar. 11, 2015	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 26, 2015	Sep. 27, 2014
Condensed Financial Statements, Captions [Line Items]
Revenue		$ 471,905	$ 394,759		$ 1,030,835	$ 870,145
Cost of revenue (excluding items shown separately below)		312,399	285,497		719,838	645,934
Depreciation, depletion, amortization and accretion		33,306	23,255		86,818	63,950
Operating income (loss)		83,357	47,749		66,651	46,652
Interest expense		20,727	22,085		62,231	62,555
Income (loss) from continuing operations before taxes		31,160	27,072		(59,215)	(13,604)
Income tax benefit (expense)		(2,655)	(1,038)		(12,468)	(2,498)
(Loss) income from continuing operations		33,815	28,110		(46,747)	(11,106)
Income from discontinued operations		(57)	(7)		(815)	(356)
Net income (loss)	$ (41,415)	33,872	28,117	$ (2,627)	(45,932)	(10,750)
Net income (loss) attributable to member of Summit Materials, LLC		14,711			4,355
Comprehensive income (loss) attributable to Summit Materials, Inc. and Summit Materials, LLC		12,090			1,748
Summit Materials, LLC [Member]
Condensed Financial Statements, Captions [Line Items]
Revenue		471,905	394,759		1,030,835	870,145
Cost of revenue (excluding items shown separately below)		312,399	285,497		719,838	645,934
General and administrative expenses		42,843	38,258		157,528	113,609
Depreciation, depletion, amortization and accretion		33,306	23,255		86,818	63,950
Operating income (loss)		83,357	47,749		66,651	46,652
Other (income) expense, net		31,470	(1,408)		63,635	(2,299)
Interest expense		20,436	22,085		61,649	62,555
Income (loss) from continuing operations before taxes		31,451	27,072		(58,633)	(13,604)
Income tax benefit (expense)		(2,655)	(1,038)		(12,468)	(2,498)
(Loss) income from continuing operations		34,106	28,110		(46,165)	(11,106)
Income from discontinued operations		(57)	(7)		(815)	(356)
Net income (loss)		34,163	28,117		(45,350)	(10,750)
Net income (loss) attributable to minority interest		52	1,243		(1,917)	674
Net income (loss) attributable to member of Summit Materials, LLC		34,111	26,874		(43,433)	(11,424)
Comprehensive income (loss) attributable to Summit Materials, Inc. and Summit Materials, LLC		26,805	25,110		(55,974)	(12,615)
Summit Materials, LLC [Member] | Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Revenue		(4,068)	(10,823)		(28,139)	(19,692)
Cost of revenue (excluding items shown separately below)		(4,068)	(10,823)		(28,139)	(19,692)
Other (income) expense, net		86,514	46,119		111,436	40,369
Interest expense		(10,796)	(2,408)		(21,568)	(5,934)
Income (loss) from continuing operations before taxes		(75,718)	(43,711)		(89,868)	(34,435)
(Loss) income from continuing operations		(75,718)	(43,711)		(89,868)	(34,435)
Net income (loss)		(75,718)	(43,711)		(89,868)	(34,435)
Net income (loss) attributable to minority interest		52	1,243		(1,917)	674
Net income (loss) attributable to member of Summit Materials, LLC		(75,770)	(44,954)		(87,951)	(35,109)
Comprehensive income (loss) attributable to Summit Materials, Inc. and Summit Materials, LLC		(68,464)	(43,190)		(75,410)	(34,163)
Summit Materials, LLC [Member] | Issuers [Member]
Condensed Financial Statements, Captions [Line Items]
General and administrative expenses		8,881	8,694		61,634	26,384
Depreciation, depletion, amortization and accretion		628	406		1,686	1,047
Operating income (loss)		(9,509)	(9,100)		(63,320)	(27,431)
Other (income) expense, net		(58,666)	(43,887)		(55,083)	(36,161)
Interest expense		15,046	7,913		35,196	21,581
Income (loss) from continuing operations before taxes		34,111	26,874		(43,433)	(12,851)
Income tax benefit (expense)						(1,427)
(Loss) income from continuing operations		34,111	26,874		(43,433)	(11,424)
Net income (loss)		34,111	26,874		(43,433)	(11,424)
Net income (loss) attributable to member of Summit Materials, LLC		34,111	26,874		(43,433)	(11,424)
Comprehensive income (loss) attributable to Summit Materials, Inc. and Summit Materials, LLC		26,805	25,110		(55,974)	(12,615)
Summit Materials, LLC [Member] | Wholly Owned Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Revenue		454,501	348,785		980,153	776,502
Cost of revenue (excluding items shown separately below)		304,204	253,284		696,068	581,602
General and administrative expenses		32,362	27,418		90,959	80,938
Depreciation, depletion, amortization and accretion		31,374	18,618		80,997	51,351
Operating income (loss)		86,561	49,465		112,129	62,611
Other (income) expense, net		3,639	(2,679)		7,140	(4,233)
Interest expense		15,286	13,416		45,332	37,831
Income (loss) from continuing operations before taxes		67,636	38,728		59,657	29,013
Income tax benefit (expense)		(2,690)	(1,038)		(12,852)	(1,071)
(Loss) income from continuing operations		70,326	39,766		72,509	30,084
Income from discontinued operations		(57)	(7)		(815)	(356)
Net income (loss)		70,383	39,773		73,324	30,440
Net income (loss) attributable to member of Summit Materials, LLC		70,383	39,773		73,324	30,440
Comprehensive income (loss) attributable to Summit Materials, Inc. and Summit Materials, LLC		69,373	39,773		72,314	30,440
Summit Materials, LLC [Member] | Non Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Revenue		21,472	22,626		78,821	43,900
Cost of revenue (excluding items shown separately below)		12,263	17,433		51,909	30,795
General and administrative expenses		1,600	495		4,935	1,062
Depreciation, depletion, amortization and accretion		1,304	523		4,135	1,068
Operating income (loss)		6,305	4,175		17,842	10,975
Other (income) expense, net		(17)	(16)		142	29
Interest expense		900	233		2,689	289
Income (loss) from continuing operations before taxes		5,422	3,958		15,011	10,657
Income tax benefit (expense)		35			384
(Loss) income from continuing operations		5,387	3,958		14,627	10,657
Net income (loss)		5,387	3,958		14,627	10,657
Net income (loss) attributable to member of Summit Materials, LLC		5,387	3,958		14,627	10,657
Comprehensive income (loss) attributable to Summit Materials, Inc. and Summit Materials, LLC		$ (909)	2,194		$ 3,096	8,893
Summit Materials, LLC [Member] | Non Wholly Owned Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Revenue			34,171			69,435
Cost of revenue (excluding items shown separately below)			25,603			53,229
General and administrative expenses			1,651			5,225
Depreciation, depletion, amortization and accretion			3,708			10,484
Operating income (loss)			3,209			497
Other (income) expense, net			(945)			(2,303)
Interest expense			2,931			8,788
Income (loss) from continuing operations before taxes			1,223			(5,988)
(Loss) income from continuing operations			1,223			(5,988)
Net income (loss)			1,223			(5,988)
Net income (loss) attributable to member of Summit Materials, LLC			1,223			(5,988)
Comprehensive income (loss) attributable to Summit Materials, Inc. and Summit Materials, LLC			$ 1,223			$ (5,170)

XML

Segment Information - Summary of Financial Data for Company's Reportable Business Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014	Dec. 27, 2014
Segment Reporting Information [Line Items]
Total revenue	$ 471,905	$ 394,759	$ 1,030,835	$ 870,145
Adjusted EBITDA	117,834	72,412	182,443	112,901
Total assets	2,330,241		2,330,241		$ 1,729,777
Interest expense	20,727	22,085	62,231	62,555
Total revenue	471,905	394,759	1,030,835	870,145
Depreciation, depletion, amortization and accretion	33,306	23,255	86,818	63,950
Initial public offering costs			28,296
Loss on debt financings	32,641		64,313
Income (loss) from continuing operations before taxes	31,160	27,072	(59,215)	(13,604)
Total capital expenditures			69,672	64,244
Total depreciation, depletion, amortization and accretion	33,306	23,255	86,818	63,950
Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Total revenue	471,905	394,759	1,030,835	870,145
Adjusted EBITDA	117,834	72,412	182,443	112,901
Total assets	2,316,736		2,316,736		1,729,777
Interest expense	20,436	22,085	61,649	62,555
Total revenue	471,905	394,759	1,030,835	870,145
Depreciation, depletion, amortization and accretion	33,306	23,255	86,818	63,950
Initial public offering costs			28,296
Loss on debt financings	32,641		64,313
Income (loss) from continuing operations before taxes	31,451	27,072	(58,633)	(13,604)
Total capital expenditures			69,672	64,244
Total depreciation, depletion, amortization and accretion	33,306	23,255	86,818	63,950
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total assets	2,280,801		2,280,801		1,703,713
Depreciation, depletion, amortization and accretion	32,678	22,849	85,132	62,902
Total capital expenditures			65,928	60,571
Total depreciation, depletion, amortization and accretion	32,678	22,849	85,132	62,902
Operating Segments [Member] | Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Total assets	2,280,801		2,280,801		1,703,713
Depreciation, depletion, amortization and accretion	32,678	22,849	85,132	62,902
Total capital expenditures			65,928	60,571
Total depreciation, depletion, amortization and accretion	32,678	22,849	85,132	62,902
Operating Segments [Member] | Aggregates [Member]
Segment Reporting Information [Line Items]
Total revenue	86,070	68,636	218,336	160,002
Total revenue	86,070	68,636	218,336	160,002
Operating Segments [Member] | Aggregates [Member] | Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Total revenue	86,070	68,636	218,336	160,002
Total revenue	86,070	68,636	218,336	160,002
Operating Segments [Member] | Cement [Member]
Segment Reporting Information [Line Items]
Total revenue	68,481	34,171	110,477	69,435
Total revenue	68,481	34,171	110,477	69,435
Operating Segments [Member] | Cement [Member] | Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Total revenue	68,481	34,171	110,477	69,435
Total revenue	68,481	34,171	110,477	69,435
Operating Segments [Member] | Ready Mixed Concrete [Member]
Segment Reporting Information [Line Items]
Total revenue	95,481	75,429	254,878	189,198
Total revenue	95,481	75,429	254,878	189,198
Operating Segments [Member] | Ready Mixed Concrete [Member] | Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Total revenue	95,481	75,429	254,878	189,198
Total revenue	95,481	75,429	254,878	189,198
Operating Segments [Member] | Asphalt [Member]
Segment Reporting Information [Line Items]
Total revenue	113,249	104,862	219,492	203,944
Total revenue	113,249	104,862	219,492	203,944
Operating Segments [Member] | Asphalt [Member] | Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Total revenue	113,249	104,862	219,492	203,944
Total revenue	113,249	104,862	219,492	203,944
Operating Segments [Member] | Paving And Related Services [Member]
Segment Reporting Information [Line Items]
Total revenue	185,092	191,157	366,321	391,925
Total revenue	185,092	191,157	366,321	391,925
Operating Segments [Member] | Paving And Related Services [Member] | Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Total revenue	185,092	191,157	366,321	391,925
Total revenue	185,092	191,157	366,321	391,925
Operating Segments [Member] | West Region [Member]
Segment Reporting Information [Line Items]
Total revenue	261,742	211,302	597,484	478,432
Adjusted EBITDA	59,574	39,105	110,940	71,646
Total assets	866,516		866,516		777,981
Total revenue	261,742	211,302	597,484	478,432
Depreciation, depletion, amortization and accretion	13,786	9,155	38,508	23,569
Total capital expenditures			32,192	25,496
Total depreciation, depletion, amortization and accretion	13,786	9,155	38,508	23,569
Operating Segments [Member] | West Region [Member] | Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Total revenue	261,742	211,302	597,484	478,432
Adjusted EBITDA	59,574	39,105	110,940	71,646
Total assets	866,516		866,516		777,981
Total revenue	261,742	211,302	597,484	478,432
Depreciation, depletion, amortization and accretion	13,786	9,155	38,508	23,569
Total capital expenditures			32,192	25,496
Total depreciation, depletion, amortization and accretion	13,786	9,155	38,508	23,569
Operating Segments [Member] | Central Region [Member]
Segment Reporting Information [Line Items]
Total revenue	164,084	126,882	338,613	283,541
Adjusted EBITDA	53,756	30,820	89,984	59,220
Total assets	1,189,565		1,189,565		704,134
Total revenue	164,084	126,882	338,613	283,541
Depreciation, depletion, amortization and accretion	15,778	9,710	37,198	28,061
Total capital expenditures			24,335	28,485
Total depreciation, depletion, amortization and accretion	15,778	9,710	37,198	28,061
Operating Segments [Member] | Central Region [Member] | Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Total revenue	164,084	126,882	338,613	283,541
Adjusted EBITDA	53,756	30,820	89,984	59,220
Total assets	1,189,565		1,189,565		704,134
Total revenue	164,084	126,882	338,613	283,541
Depreciation, depletion, amortization and accretion	15,778	9,710	37,198	28,061
Total capital expenditures			24,335	28,485
Total depreciation, depletion, amortization and accretion	15,778	9,710	37,198	28,061
Operating Segments [Member] | East Region [Member]
Segment Reporting Information [Line Items]
Total revenue	46,079	56,575	94,738	108,172
Adjusted EBITDA	13,383	11,868	15,096	10,462
Total assets	224,720		224,720		221,598
Total revenue	46,079	56,575	94,738	108,172
Depreciation, depletion, amortization and accretion	3,114	3,984	9,426	11,272
Total capital expenditures			9,401	6,590
Total depreciation, depletion, amortization and accretion	3,114	3,984	9,426	11,272
Operating Segments [Member] | East Region [Member] | Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Total revenue	46,079	56,575	94,738	108,172
Adjusted EBITDA	13,383	11,868	15,096	10,462
Total assets	224,720		224,720		221,598
Total revenue	46,079	56,575	94,738	108,172
Depreciation, depletion, amortization and accretion	3,114	3,984	9,426	11,272
Total capital expenditures			9,401	6,590
Total depreciation, depletion, amortization and accretion	3,114	3,984	9,426	11,272
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue	(76,468)	(79,496)	(138,669)	(144,359)
Total revenue	(76,468)	(79,496)	(138,669)	(144,359)
Intersegment Eliminations [Member] | Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Total revenue	(76,468)	(79,496)	(138,669)	(144,359)
Total revenue	(76,468)	(79,496)	(138,669)	(144,359)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDA	(8,879)	(9,381)	(33,577)	(28,427)
Total assets	49,440		49,440		26,064
Depreciation, depletion, amortization and accretion	628	406	1,686	1,048
Total capital expenditures			3,744	3,673
Total depreciation, depletion, amortization and accretion	628	406	1,686	1,048
Corporate and Other [Member] | Summit Materials, LLC [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDA	(8,879)	(9,381)	(33,577)	(28,427)
Total assets	35,935		35,935		$ 26,064
Depreciation, depletion, amortization and accretion	628	406	1,686	1,048
Total capital expenditures			3,744	3,673
Total depreciation, depletion, amortization and accretion	$ 628	$ 406	$ 1,686	$ 1,048

XML

Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 26, 2015

Schedule of Supplemental Cash Flow Information

Supplemental cash flow information is as follows:

	Nine months ended
	September 26, 2015			September 27, 2014
Cash payments:
Interest	$	75,990		$	59,179
Income taxes		1,516			1,345
Non cash financing activities:
Purchase of noncontrolling interest in Continental Cement	$	(29,102	)	$	—

Summit Materials, LLC [Member]

Schedule of Supplemental Cash Flow Information

Supplemental cash flow information is as follows:

	Nine months ended
	September 26,			September 27,
	2015			2014
Cash payments:
Interest	$	75,990		$	59,179
Income taxes		1,516			1,345
Non cash financing activities:
Purchase of noncontrolling interest in Continental Cement	$	(64,102	)	$	—

XML

Debt - Schedule of Contractual Payments of Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 26, 2015	Dec. 27, 2014
Long Term Debt Maturities Repayments Of Principal [Line Items]
2015 (three months)	$ 3,250
2016	6,500
2017	6,500
2018	4,875
2019	6,500
2020	161,925
Thereafter	964,250
Total	1,153,800
Plus: Original issue net premium	2,393
Long-term debt, total	1,156,193	$ 1,064,917
Summit Materials, LLC [Member]
Long Term Debt Maturities Repayments Of Principal [Line Items]
2015 (three months)	3,250
2016	6,500
2017	6,500
2018	4,875
2019	6,500
2020	161,925
Thereafter	964,250
Total	1,153,800
Plus: Original issue net premium	2,393
Long-term debt, total	$ 1,156,193	$ 1,064,917

XML

Segment Information

9 Months Ended

Sep. 26, 2015

Segment Information

14. SEGMENT INFORMATION

The Company has three operating segments, which are its reportable segments: the West; Central; and East regions. These segments are consistent with the Company’s management reporting structure. Each region’s operations consist of various activities related to the production, distribution and sale of construction materials, products and the provision of paving and related services. Assets employed by segment include assets directly identified with those operations. Corporate assets consist primarily of cash, property, plant and equipment for corporate operations and other assets not directly identifiable with a reportable business segment. The accounting policies applicable to each segment are consistent with those used in preparing the consolidated financial statements. The following tables display selected financial data for the Company’s reportable segments:

	Three months ended				Nine months ended
	September 26, 2015		September 27, 2014		September 26, 2015		September 27, 2014
Revenue:
West region	$	261,742	$	211,302	$	597,484	$	478,432
Central region		164,084		126,882		338,613		283,541
East region		46,079		56,575		94,738		108,172
Total revenue	$	471,905	$	394,759	$	1,030,835	$	870,145

	Three months ended						Nine months ended
	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
Adjusted EBITDA
West region	$	59,574		$	39,105		$	110,940		$	71,646
Central region		53,756			30,820			89,984			59,220
East region		13,383			11,868			15,096			10,462
Corporate and other		(8,879	)		(9,381	)		(33,577	)		(28,427	)
Total reportable segments and corporate		117,834			72,412			182,443			112,901
Interest expense		20,727			22,085			62,231			62,555
Depreciation, depletion, amortization and accretion		33,306			23,255			86,818			63,950
Initial public offering costs		—			—			28,296			—
Loss on debt financings		32,641			—			64,313			—
Income (loss) from continuing operations before taxes	$	31,160		$	27,072		$	(59,215	)	$	(13,604	)

	Nine months ended
	September 26, 2015		September 27, 2014
Cash paid for capital expenditures:
West region	$	32,192	$	25,496
Central region		24,335		28,485
East region		9,401		6,590
Total reportable segments		65,928		60,571
Corporate and other		3,744		3,673
Total capital expenditures	$	69,672	$	64,244

	Three months ended				Nine months ended
	September 26, 2015		September 27, 2014		September 26, 2015		September 27, 2014
Depreciation, depletion, amortization and accretion:
West region	$	13,786	$	9,155	$	38,508	$	23,569
Central region		15,778		9,710		37,198		28,061
East region		3,114		3,984		9,426		11,272
Total reportable segments		32,678		22,849		85,132		62,902
Corporate and other		628		406		1,686		1,048
Total depreciation, depletion, amortization and accretion	$	33,306	$	23,255	$	86,818	$	63,950

	September 26, 2015		December 27, 2014
Total assets:
West region	$	866,516	$	777,981
Central region		1,189,565		704,134
East region		224,720		221,598
Total reportable segments		2,280,801		1,703,713
Corporate and other		49,440		26,064
Total	$	2,330,241	$	1,729,777

	Three months ended						Nine months ended
	September 26, 2015			September 27, 2014			September 26, 2015			September 27, 2014
Revenue by product:*
Aggregates	$	86,070		$	68,636		$	218,336		$	160,002
Cement		68,481			34,171			110,477			69,435
Ready-mixed concrete		95,481			75,429			254,878			189,198
Asphalt		113,249			104,862			219,492			203,944
Paving and related services		185,092			191,157			366,321			391,925
Other		(76,468	)		(79,496	)		(138,669	)		(144,359	)
Total revenue	$	471,905		$	394,759		$	1,030,835		$	870,145

* Revenue by product includes intercompany and intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other. Revenue from the liquid asphalt terminals is included in asphalt revenue.

Summit Materials, LLC [Member]

Segment Information

13. SEGMENT INFORMATION

The Company has three operating segments, which are its reportable segments: the West; Central; and East regions. These segments are consistent with the Company’s management reporting structure. Each region’s operations consist of various activities related to the production, distribution and sale of construction materials, products and the provision of paving and related services. Assets employed by segment include assets directly identified with those operations. Corporate assets consist primarily of cash, property, plant and equipment for corporate operations and other assets not directly identifiable with a reportable business segment. The accounting policies applicable to each segment are consistent with those used in preparing the consolidated financial statements. The following tables display selected financial data for the Company’s reportable segments:

	Three months ended				Nine months ended
	September 26,		September 27,		September 26,		September 27,
	2015		2014		2015		2014
Revenue:
West region	$	261,742	$	211,302	$	597,484	$	478,432
Central region		164,084		126,882		338,613		283,541
East region		46,079		56,575		94,738		108,172
Total revenue	$	471,905	$	394,759	$	1,030,835	$	870,145

	Three months ended						Nine months ended
	September 26,			September 27,			September 26,			September 27,
	2015			2014			2015			2014
Adjusted EBITDA
West region	$	59,574		$	39,105		$	110,940		$	71,646
Central region		53,756			30,820			89,984			59,220
East region		13,383			11,868			15,096			10,462
Corporate and other		(8,879	)		(9,381	)		(33,577	)		(28,427	)
Total reportable segments and corporate		117,834			72,412			182,443			112,901
Interest expense		20,436			22,085			61,649			62,555
Depreciation, depletion, amortization and accretion		33,306			23,255			86,818			63,950
Initial public offering costs		—			—			28,296			—
Loss on debt financings		32,641			—			64,313			—
Income (loss) from continuing operations before taxes	$	31,451		$	27,072		$	(58,633	)	$	(13,604	)

	Nine months ended
	September 26,		September 27,
	2015		2014
Cash paid for capital expenditures:
West region	$	32,192	$	25,496
Central region		24,335		28,485
East region		9,401		6,590
Total reportable segments		65,928		60,571
Corporate and other		3,744		3,673
Total capital expenditures	$	69,672	$	64,244

	Three months ended				Nine months ended
	September 26,		September 27,		September 26,		September 27,
	2015		2014		2015		2014
Depreciation, depletion, amortization and accretion:
West region	$	13,786	$	9,155	$	38,508	$	23,569
Central region		15,778		9,710		37,198		28,061
East region		3,114		3,984		9,426		11,272
Total reportable segments		32,678		22,849		85,132		62,902
Corporate and other		628		406		1,686		1,048
Total depreciation, depletion, amortization and accretion	$	33,306	$	23,255	$	86,818	$	63,950

	September 26,		December 27,
	2015		2014
Total assets:
West region	$	866,516	$	777,981
Central region		1,189,565		704,134
East region		224,720		221,598
Total reportable segments		2,280,801		1,703,713
Corporate and other		35,935		26,064
Total	$	2,316,736	$	1,729,777

	Three months ended						Nine months ended
	September 26,			September 27,			September 26,			September 27,
	2015			2014			2015			2014
Revenue by product:*
Aggregates	$	86,070		$	68,636		$	218,336		$	160,002
Cement		68,481			34,171			110,477			69,435
Ready-mixed concrete		95,481			75,429			254,878			189,198
Asphalt		113,249			104,862			219,492			203,944
Paving and related services		185,092			191,157			366,321			391,925
Other		(76,468	)		(79,496	)		(138,669	)		(144,359	)
Total revenue	$	471,905		$	394,759		$	1,030,835		$	870,145

* Revenue by product includes intercompany and intracompany sales transferred at market value. The elimination of intracompany transactions is included in Other. Revenue from the liquid asphalt terminals is included in asphalt revenue.

XML

Acquisitions (Tables)

9 Months Ended

Sep. 26, 2015

Summary of Proforma Information

The following unaudited supplemental pro forma information presents the financial results as if the Davenport Assets had been acquired on the first day of the 2014 fiscal year. This supplemental pro forma information has been prepared for comparative purposes and does not purport to be indicative of what would have occurred had the acquisition been made on the first day of the preceding fiscal year, nor is it indicative of any future results. The pro forma adjustments include a reduction of transaction costs of $6.5 million and additional depreciation, depletion, amortization and accretion of $7.5 million.

	Three months ended September 26, 2015		Nine months ended September 26, 2015
Revenue	$	477,706	$	1,069,305
Net income		27,649		26,764

Summary of Assets Acquired and Liabilities Assumed

The purchase price allocation for the Davenport Assets has not been finalized due to the recent timing of the acquisition. The following table summarizes aggregated information regarding the estimated fair values of the assets acquired and liabilities assumed in conjunction with the acquisition:

	September 26, 2015
Inventories	$	21,538
Property, plant and equipment		272,815
Other assets		6,537
Financial liabilities		(1,509	)
Other long-term liabilities		(95	)
Net assets acquired		299,286
Goodwill		150,710
Total consideration		449,996
Transfer of assets		(2,182	)
Working capital true-up		896
Net cash paid for acquisitions	$	448,710

Summit Materials, LLC [Member]

Summary of Proforma Information

The following unaudited supplemental pro forma information presents the financial results as if the Davenport Assets had been acquired on the first day of the 2014 fiscal year. This supplemental pro forma information has been prepared for comparative purposes and does not purport to be indicative of what would have occurred had the acquisition been made on the first day of the preceding fiscal year, nor is it indicative of any future results. The pro forma adjustments include a reduction of transaction costs of $6.5 million and additional depreciation, depletion, amortization and accretion of $7.5 million.

	Three months ended		Nine months ended
	September 26, 2015		September 26, 2015
Revenue	$	477,706	$	1,069,305
Net income		67,229		24,506

Summary of Assets Acquired and Liabilities Assumed

The following table summarizes aggregated information regarding the estimated fair values of the assets acquired and liabilities assumed in conjunction with the acquisition:

	September 26, 2015
Inventories	$	21,538
Property, plant and equipment		272,815
Other assets		6,537
Financial liabilities		(1,509	)
Other long-term liabilities		(95	)
Net assets acquired		299,286
Goodwill		150,710
Total consideration		449,996
Transfer of assets		(2,182	)
Working capital true-up		896
Net cash paid for acquisitions	$	448,710

XML

Debt - Schedule of Debt (Detail) - USD ($) $ in Thousands	Sep. 26, 2015	Dec. 27, 2014
Debt Instrument [Line Items]
Revolving credit facility	$ 60,000
Long-term debt:
Long-term debt, total	1,156,193	$ 1,064,917
Long-term debt, total	1,156,193	1,064,917
Current portion of long-term debt	8,125	5,275
Long-term debt	1,148,068	1,059,642
Summit Materials, LLC [Member]
Debt Instrument [Line Items]
Revolving credit facility	60,000
Long-term debt:
Long-term debt, total	1,156,193	1,064,917
Long-term debt, total	1,156,193	1,064,917
Current portion of long-term debt	8,125	5,275
Long-term debt	1,148,068	1,059,642
10 1/2% Senior Notes, due 2020 [Member]
Long-term debt:
Long-term debt, total	159,365	651,548
Long-term debt, total	159,365	651,548
10 1/2% Senior Notes, due 2020 [Member] | Summit Materials, LLC [Member]
Long-term debt:
Long-term debt, total	159,365	651,548
Long-term debt, total	159,365	651,548
6 1/8% Senior Notes, due 2023 [Member]
Long-term debt:
Long-term debt, total	350,000
Long-term debt, total	350,000
6 1/8% Senior Notes, due 2023 [Member] | Summit Materials, LLC [Member]
Long-term debt:
Long-term debt, total	350,000
Long-term debt, total	350,000
Term Loan, due 2022 [Member] | Credit Facility [Member]
Long-term debt:
Long-term debt, total	646,828	413,369
Long-term debt, total	646,828	413,369
Term Loan, due 2022 [Member] | Summit Materials, LLC [Member] | Credit Facility [Member]
Long-term debt:
Long-term debt, total	646,828	413,369
Long-term debt, total	$ 646,828	$ 413,369

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Reorganization - Additional Information (Detail) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 26, 2015 USD ($) $ / shares shares
Reorganization Items [Line Items]
Number of LP Units outstanding	69,007,297
Vesting period of leverage restoration options	4 years
Summit Materials, LLC [Member]
Reorganization Items [Line Items]
Number of LP Units outstanding	69,007,297
Vesting period of leverage restoration options	4 years
General and Administrative Expense Costs [Member]
Reorganization Items [Line Items]
Modification charge recognized in general and administrative costs | $	$ 14.5
General and Administrative Expense Costs [Member] | Summit Materials, LLC [Member]
Reorganization Items [Line Items]
Modification charge recognized in general and administrative costs | $	$ 14.5
Common Class A-2 [Member]
Reorganization Items [Line Items]
Number of LP Units outstanding	0
Common Class A [Member]
Reorganization Items [Line Items]
Class A common shares	1,029,183
Common Class A [Member] | Summit Materials, LLC [Member]
Reorganization Items [Line Items]
Class A common shares	1,029,183
Common Class A [Member] | 2015 Omnibus Equity Incentive Plan [Member]
Reorganization Items [Line Items]
Number of class A common stock issued under the Omnibus Incentive Plan	240,000
Exercise price per share under the Omnibus Incentive Plan | $ / shares	$ 18.00
Common Class A [Member] | 2015 Omnibus Equity Incentive Plan [Member] | Summit Materials, LLC [Member]
Reorganization Items [Line Items]
Number of class A common stock issued under the Omnibus Incentive Plan	240,000
Exercise price per share under the Omnibus Incentive Plan | $ / shares	$ 18.00
Share-based Compensation Award, Tranche One [Member] | 2015 Omnibus Equity Incentive Plan [Member]
Reorganization Items [Line Items]
Percentage of performance-vesting options	25.00%
Share-based Compensation Award, Tranche One [Member] | 2015 Omnibus Equity Incentive Plan [Member] | Summit Materials, LLC [Member]
Reorganization Items [Line Items]
Percentage of performance-vesting options	25.00%
Initial Public Offering [Member] | Common Class A [Member]
Reorganization Items [Line Items]
Class A common shares	25,555,555
Class A Common stock offering price per share | $ / shares	$ 18.00
Initial Public Offering [Member] | Common Class A [Member] | Summit Materials, LLC [Member]
Reorganization Items [Line Items]
Class A common shares	25,555,555
Class A Common stock offering price per share | $ / shares	$ 18.00
Class C Units [Member] | Common Class A [Member]
Reorganization Items [Line Items]
Class A common shares	160,333
Class C Units [Member] | Common Class A [Member] | Summit Materials, LLC [Member]
Reorganization Items [Line Items]
Class A common shares	160,333
Class D Units [Member] | Common Class A [Member]
Reorganization Items [Line Items]
Class A common shares	4,358,842
Class D Units [Member] | Common Class A [Member] | Summit Materials, LLC [Member]
Reorganization Items [Line Items]
Class A common shares	4,358,842

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Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Net income (loss)	$ 33,872	$ 28,117	$ (45,932)	$ (10,750)
Other comprehensive (loss) income:
Postretirement curtailment adjustment				(1,346)
Postretirement liability adjustment				2,164
Foreign currency translation adjustment	(6,296)	(1,764)	(11,531)	(1,764)
Loss on cash flow hedges	(1,010)		(1,010)
Other comprehensive income (loss)	(7,306)	(1,764)	(12,541)	(946)
Comprehensive income (loss)	26,566	26,353	(58,473)	(11,696)
Comprehensive income (loss) attributable to Summit Materials, Inc. and Summit Materials, LLC	12,090		1,748
Summit Materials, LLC [Member]
Net income (loss)	34,163	28,117	(45,350)	(10,750)
Other comprehensive (loss) income:
Postretirement curtailment adjustment				(1,346)
Postretirement liability adjustment				2,164
Foreign currency translation adjustment	(6,296)	(1,764)	(11,531)	(1,764)
Loss on cash flow hedges	(1,010)		(1,010)
Other comprehensive income (loss)	(7,306)	(1,764)	(12,541)	(946)
Comprehensive income (loss)	26,857	26,353	(57,891)	(11,696)
Less comprehensive income (loss) attributable to the noncontrolling interest	52	1,243	(1,917)	919
Comprehensive income (loss) attributable to Summit Materials, Inc. and Summit Materials, LLC	26,805	25,110	(55,974)	(12,615)
Summit Holdings [Member]
Other comprehensive (loss) income:
Comprehensive income (loss) attributable to Summit Materials, Inc. and Summit Materials, LLC	$ 14,424	$ 25,110	$ (58,304)	$ (12,615)

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Acquisitions

9 Months Ended

Sep. 26, 2015

Acquisitions

3. ACQUISITIONS

On July 17, 2015, the Company acquired the Davenport Assets for a purchase price of $450.0 million in cash and a cement distribution terminal in Bettendorf, Iowa. The operating results of the acquired business have been included in the Central region’s results of operations since the date of the acquisition. Assets acquired and liabilities assumed are measured at their acquisition-date fair value. Goodwill recognized in connection with the acquisition is primarily attributable to the expected profitability, assembled workforce and operational infrastructure of the acquired business and the synergies expected to result after its integration. The Davenport Assets were immediately integrated into the Company’s existing cement operations such that it is not practicable to report revenue and net income separately for the Davenport Assets.

Pro Forma Financial Information (unaudited) — The following unaudited supplemental pro forma information presents the financial results as if the Davenport Assets had been acquired on the first day of the 2014 fiscal year. This supplemental pro forma information has been prepared for comparative purposes and does not purport to be indicative of what would have occurred had the acquisition been made on the first day of the preceding fiscal year, nor is it indicative of any future results. The pro forma adjustments include a reduction of transaction costs of $6.5 million and additional depreciation, depletion, amortization and accretion of $7.5 million.

	Three months ended September 26, 2015		Nine months ended September 26, 2015
Revenue	$	477,706	$	1,069,305
Net income		27,649		26,764

The purchase price allocation for the Davenport Assets has not been finalized due to the recent timing of the acquisition. The following table summarizes aggregated information regarding the estimated fair values of the assets acquired and liabilities assumed in conjunction with the acquisition:

	September 26, 2015
Inventories	$	21,538
Property, plant and equipment		272,815
Other assets		6,537
Financial liabilities		(1,509	)
Other long-term liabilities		(95	)
Net assets acquired		299,286
Goodwill		150,710
Total consideration		449,996
Transfer of assets		(2,182	)
Working capital true-up		896
Net cash paid for acquisitions	$	448,710

Summit Materials, LLC [Member]

Acquisitions

3. ACQUISITIONS

On July 17, 2015, the Company acquired the Davenport Assets for a purchase price of $450.0 million in cash and a cement distribution terminal in Bettendorf, Iowa. The operating results of the acquired business have been included in the Central region’s results of operations since the date of the acquisition. Assets acquired and liabilities assumed are measured at their acquisition-date fair value. Goodwill recognized in connection with the acquisition is primarily attributable to the expected profitability, assembled workforces and operational infrastructure of the acquired business and the synergies expected to result after its integration. The Davenport Assets were immediately integrated into the Company’s existing cement operations such that it is not practicable to report revenue and net income separately for the Davenport Assets.

Pro Forma Financial Information (unaudited) — The following unaudited supplemental pro forma information presents the financial results as if the Davenport Assets had been acquired on the first day of the 2014 fiscal year. This supplemental pro forma information has been prepared for comparative purposes and does not purport to be indicative of what would have occurred had the acquisition been made on the first day of the preceding fiscal year, nor is it indicative of any future results. The pro forma adjustments include a reduction of transaction costs of $6.5 million and additional depreciation, depletion, amortization and accretion of $7.5 million.

	Three months ended		Nine months ended
	September 26, 2015		September 26, 2015
Revenue	$	477,706	$	1,069,305
Net income		67,229		24,506

The purchase price allocation for the Davenport Assets has not been finalized due to the recent timing of the acquisition. The following table summarizes aggregated information regarding the estimated fair values of the assets acquired and liabilities assumed in conjunction with the acquisition:

	September 26, 2015
Inventories	$	21,538
Property, plant and equipment		272,815
Other assets		6,537
Financial liabilities		(1,509	)
Other long-term liabilities		(95	)
Net assets acquired		299,286
Goodwill		150,710
Total consideration		449,996
Transfer of assets		(2,182	)
Working capital true-up		896
Net cash paid for acquisitions	$	448,710

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Net Income Per Share - Additional Information (Detail) - $ / shares		3 Months Ended	7 Months Ended	9 Months Ended
	Aug. 11, 2015	Sep. 26, 2015	Sep. 26, 2015	Sep. 26, 2015
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Basic and diluted earnings per share for discontinued operations		$ 0.00		$ 0.01
Limited Partnership Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti dilutive shares excluded from calcualtion of earnings per share				99,342,035
Stock Option [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti dilutive shares excluded from calcualtion of earnings per share				250,000
Common Class A [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Issuance of common stock, Shares	22,425,000		47,980,555	25,555,555
Class A common shares				1,029,183
Common stock, shares outstanding		49,009,738	49,009,738	49,009,738

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Goodwill (Tables)

9 Months Ended

Sep. 26, 2015

Summary of Changes in Carrying Amount of Goodwill

Changes in the carrying amount of goodwill, by reportable segment, from December 27, 2014 to September 26, 2015 are summarized as follows:

	West			Central		East		Total
Balance, December 27, 2014	$	297,085		$	96,025	$	26,160	$	419,270
Acquisitions (1)		4,579			150,929		—		155,508
Foreign currency translation adjustments		(6,942	)		—		—		(6,942	)
Balance, September 26, 2015	$	294,722		$	246,954	$	26,160	$	567,836

(1) Includes certain working capital adjustments related to 2014 acquisitions

Summit Materials, LLC [Member]

Summary of Changes in Carrying Amount of Goodwill

Changes in the carrying amount of goodwill, by reportable segment, from December 27, 2014 to September 26, 2015 are summarized as follows:

	West			Central		East		Total
Balance, December 27, 2014	$	297,085		$	96,025	$	26,160	$	419,270
Acquisitions (1)		4,579			150,929		—		155,508
Foreign currency translation adjustments		(6,942	)		—		—		(6,942	)
Balance, September 26, 2015	$	294,722		$	246,954	$	26,160	$	567,836

(1) Includes certain working capital adjustments related to 2014 acquisitions

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Summary of Organization and Significant Accounting Policies - Schedule of Contingent Consideration Obligations Measured at Fair Value (Detail) - USD ($) $ in Thousands	Sep. 26, 2015	Dec. 27, 2014
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	$ 4,559	$ 2,375
Cash flow hedge	114
Contingent consideration	2,711	5,379
Cash flow hedge	897
Summit Materials, LLC [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	4,559	2,375
Cash flow hedge	114
Contingent consideration	2,711	$ 5,379
Cash flow hedge	$ 897

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Supplemental Cash Flow Information

9 Months Ended

Sep. 26, 2015

Supplemental Cash Flow Information

13. SUPPLEMENTAL CASH FLOW INFORMATION

Supplemental cash flow information is as follows:

	Nine months ended
	September 26, 2015			September 27, 2014
Cash payments:
Interest	$	75,990		$	59,179
Income taxes		1,516			1,345
Non cash financing activities:
Purchase of noncontrolling interest in Continental Cement	$	(29,102	)	$	—

Summit Materials, LLC [Member]

Supplemental Cash Flow Information

12. SUPPLEMENTAL CASH FLOW INFORMATION

Supplemental cash flow information is as follows:

	Nine months ended
	September 26,			September 27,
	2015			2014
Cash payments:
Interest	$	75,990		$	59,179
Income taxes		1,516			1,345
Non cash financing activities:
Purchase of noncontrolling interest in Continental Cement	$	(64,102	)	$	—