Document:

EX-10.2

 Exhibit 10.2 

EXCHANGE AGREEMENT 

EXCHANGE AGREEMENT (this “Agreement”), dated as of March 11, 2015, among Summit Materials, Inc., a Delaware
corporation, Summit Materials Holdings L.P., a Delaware limited partnership, and the holders of LP Units (as defined herein) from time to time party hereto. 

WHEREAS, the parties hereto desire to provide for the exchange of LP Units for shares of Class A Common Stock (as defined herein), on the
terms and subject to the conditions set forth herein. 
 NOW, THEREFORE, in consideration of the mutual covenants and undertakings contained
herein and for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows: 

ARTICLE I 

SECTION 1.1. Definitions 

The following definitions shall be for all purposes, unless otherwise clearly indicated to the contrary, applied to the terms used in this
Agreement. 
 “Agreement” has the meaning set forth in the preamble of this Agreement. 

“Class A Common Stock” means the Class A common stock, par value $0.01 per share, of the Corporation. 

“Class B Common Stock” means the Class B common stock, par value $0.01 per share, of the Corporation. 

“Code” means the Internal Revenue Code of 1986, as amended. 

“Corporation” means Summit Materials, Inc., a Delaware corporation, and any successor thereto. 

“Exchange” has the meaning set forth in Section 2.1(a) hereof. 

“Exchange Rate” means, at any time, the number of shares of Class A Common Stock for which a LP Unit is entitled
to be exchanged at such time. On the date of this Agreement, the Exchange Rate shall be 1 for 1, subject to adjustment pursuant to Section 2.2 hereof. 

“Financial Sponsor Holders” means the affiliates of The Blackstone Group L.P. identified as the Financial Sponsor
Holders on the signature pages hereto and Permitted Transferees thereof. 
 “IPO” has the meaning set forth in
Section 2.1(b) hereof. 
 “LP Unit” means (i) each Class A Unit (as such term is defined in
the Summit Holdings LP Agreement) issued as of the date hereof and (ii) each Class A Unit or other interest in Summit Holdings that may be issued by Summit Holdings in the future that is designated by the Corporation as a “LP
Unit.” 

 “LP Unitholder” means each holder of one or more LP Units that may from
time to time be a party to this Agreement. 
 “Permitted Transferee” has the meaning given to such term in
Section 3.1 hereof. 
 “Securities Act” has the meaning set forth in Section 2.1(f) hereof.

 “Summit Holdings” means Summit Materials Holdings L.P., a Delaware limited partnership, and any successor
thereto. 
 “Summit Holdco” means Summit Owner Holdco, LLC, a Delaware limited liability company, and any successor
thereto. 
 “Summit Holdings LP Agreement” means the Fourth Amended and Restated Limited Partnership Agreement of
Summit Holdings, dated on or about the date hereof, as such agreement may be amended from time to time. 
 “Unvested
Units” has the meaning given to such term in the Summit Holdings LP Agreement. 
 ARTICLE II 

SECTION 2.1. Exchange of LP Units for Class A Common Stock. 

(a) Each Financial Sponsor Holder shall be entitled at any time and from time to time, upon the terms and subject to the conditions hereof, to
surrender LP Units (other than Unvested Units) to the Corporation, for the account of Summit Holdings, in exchange for the delivery to the exchanging Financial Sponsor Holder of a number of shares of Class A Common Stock that is equal to the
product of the number of LP Units surrendered multiplied by the Exchange Rate (such exchange, an “Exchange”); provided that any such Exchange is for a minimum of the lesser of 1,000 LP Units or all of the LP
Units (other than Unvested Units) held by such Financial Sponsor Holder. 
 (b) Each LP Unitholder that is not a Financial Sponsor Holder
shall be entitled from and after the first anniversary of the date of the closing of the initial public offering and sale of Class A Common Stock (as contemplated by the Corporation’s Registration Statement on Form S-1 (File
No. 333-201058)) (the “IPO”), or, if later, the date of the initial filing by the Corporation of a registration statement with the U.S. Securities and Exchange Commission to cover delivery of shares of Class A
Common Stock to LP Unitholders upon an Exchange (as defined herein) of LP Units (other than Unvested Units), at any time and from time to time, upon the terms and subject to the conditions hereof to elect to effect an Exchange; provided that
any such Exchange is for a minimum of the lesser of 1,000 LP Units or all of the LP Units (other than Unvested Units) held by such LP Unitholder. 

 (c) An LP Unitholder shall exercise its right to exchange LP Units as set forth in
Section 2.1(a) or Section 2.1(b) hereof, as applicable, by delivering to the Corporation and to Summit Holdings a written election of exchange in respect of the LP Units to be exchanged substantially in the form of Exhibit
A hereto and any certificates, if any, representing LP Units, duly executed by such holder or such holder’s duly authorized attorney, in each case delivered during normal business hours at the principal executive offices of the Corporation
and of Summit Holdings. As promptly as practicable following the delivery of such a written election of exchange, Summit Holdings shall deliver or cause to be delivered at the offices of the then-acting registrar and transfer agent of the
Class A Common Stock or, if there is no then-acting registrar and transfer agent of the Class A Common Stock, at the principal executive offices of the Corporation, the number of shares of Class A Common Stock deliverable upon such
Exchange, registered in the name of the relevant exchanging LP Unitholder. To the extent the Class A Common Stock is settled through the facilities of The Depository Trust Company, and the exchanging LP Unitholder is permitted to hold shares of
Class A Common Stock through The Depository Trust Company, Summit Holdings will, subject to Section 2.1(d) hereof, upon the written instruction of an exchanging LP Unitholder, use its reasonable best efforts to deliver or cause to
be delivered the shares of Class A Common Stock deliverable to such exchanging LP Unitholder, through the facilities of The Depository Trust Company, to the account of the participant of The Depository Trust Company designated by such
exchanging LP Unitholder. The Corporation shall take such actions as may be required to ensure the performance by Summit Holdings of its obligations under this Section 2.1(c) and Section 2.1(a) and Section 2.1(b)
hereof, including the issuance and sale of shares of Class A Common Stock to or for the account of Summit Holdings in exchange for the delivery to the Corporation of a number of LP Units that is equal to the number of LP Units surrendered
by an exchanging LP Unitholder. Any LP Unitholder (other than Summit Holdco) that surrenders all of its LP Units (other than Unvested Units) held by such LP Unitholder to the Corporation, for the account of Summit Holdings, pursuant to this
Section 2.1 shall concurrently surrender all shares of Class B Common Stock held by such LP Unitholder (including any fractions thereof) to the Corporation. 

(d) Summit Holdings and each exchanging LP Unitholder shall bear its own expenses in connection with the consummation of any Exchange, whether
or not any such Exchange is ultimately consummated, except that Summit Holdings shall bear any transfer taxes, stamp taxes or duties, or other similar taxes in connection with, or arising by reason of, any Exchange; provided, however,
that if any shares of Class A Common Stock are to be delivered in a name other than that of the LP Unitholder that requested the Exchange, then such LP Unitholder and/or the person in whose name such shares are to be delivered shall pay to
Summit Holdings the amount of any transfer taxes, stamp taxes or duties, or other similar taxes in connection with, or arising by reason of, such Exchange or shall establish to the reasonable satisfaction of Summit Holdings that such tax has been
paid or is not payable. 
 (e) To the extent the Corporation or Summit Holdings shall determine that LP Units do not meet the requirements
of Treasury Regulation Section 1.7704-1(h), the Corporation or Summit Holdings may impose such restrictions on Exchange as the Corporation or Summit Holdings may reasonably determine to be necessary or advisable so that Summit Holdings is not
treated as a “publicly traded partnership” under Section 7704 of the Code; provided, that each LP Unitholder shall be entitled at any time Exchange LP Units for Class A Common Stock, provided that the aggregate number of
LP Units surrendered by such LP Unitholder in any such Exchange 

 
is greater than 2% of the then-outstanding LP Units (provided that such Exchange constitutes part of a “block transfer” within the meaning of Treasury Regulation
Section 1.7704-1(e)(2)). Notwithstanding anything to the contrary herein, no Exchange shall be permitted (and, if attempted, shall be void ab initio) if, in the good faith determination of the Corporation or of Summit Holdings, such an
Exchange would pose a material risk that Summit Holdings would be a “publicly traded partnership” under Section 7704 of the Code. 

(f) For the avoidance of doubt, and notwithstanding anything to the contrary herein, an LP Unitholder shall not be entitled to exchange LP
Units to the extent the Corporation determines that such Exchange (i) would be prohibited by law or regulation (including, without limitation, the unavailability of any requisite registration statement filed under the U.S. Securities Act of
1933, as amended (the “Securities Act”), or any exemption from the registration requirements thereunder) or (ii) would not be permitted under any other agreements with the Corporation or its subsidiaries to which such LP
Unitholder may be party (including, without limitation, the Summit Holdings LP Agreement) or any written policies of the Corporation related to unlawful or inappropriate trading applicable to its directors, officers or other personnel. 

(g) The Corporation may adopt reasonable procedures for the implementation of the exchange provisions set forth in this Article II,
including, without limitation, procedures for the giving of notice of an election of exchange. 
 SECTION 2.2.
Adjustment. 
 (a) The Exchange Rate shall be adjusted accordingly if there is: (a) any subdivision (by any unit split, unit
distribution, reclassification, reorganization, recapitalization or otherwise) or combination (by reverse unit split, reclassification, reorganization, recapitalization or otherwise) of the LP Units that is not accompanied by an identical
subdivision or combination of the Class A Common Stock; or (b) any subdivision (by any stock split, stock dividend or distribution, reclassification, reorganization, recapitalization or otherwise) or combination (by reverse stock split,
reclassification, reorganization, recapitalization or otherwise) of the Class A Common Stock that is not accompanied by an identical subdivision or combination of the LP Units; provided, however, no adjustment to the Exchange Rate
will be made solely as a result of a stock dividend by the Corporation that is effected in order to maintain the relationship between the shares of Class A Common Stock and LP Units . If there is any reclassification, reorganization,
recapitalization or other similar transaction in which the Class A Common Stock is converted or changed into another security, securities or other property, then upon any subsequent Exchange, an exchanging LP Unitholder shall be entitled to
receive the amount of such security, securities or other property that such exchanging LP Unitholder would have received if such Exchange had occurred immediately prior to the effective date of such reclassification, reorganization, recapitalization
or other similar transaction, taking into account any adjustment as a result of any subdivision (by any split, distribution or dividend, reclassification, reorganization, recapitalization or otherwise) or combination (by reverse split,
reclassification, recapitalization or otherwise) of such security, securities or other property that occurs after the effective time of such reclassification, reorganization, recapitalization or other similar transaction. Except as may be required
in the immediately preceding sentence, no adjustments in respect of distributions shall be made upon the exchange of any LP Unit. 

SECTION 2.3. Class A Common Stock to be Issued. 

 (a) The Corporation shall at all times reserve and keep available out of its authorized but
unissued Class A Common Stock, solely for the purpose of issuance upon an Exchange, such number of shares of Class A Common Stock as shall be deliverable upon any such Exchange; provided that nothing contained herein shall be
construed to preclude Summit Holdings from satisfying its obligations in respect of the Exchange of the LP Units by delivery of shares of Class A Common Stock which are held in the treasury of the Corporation or are held by Summit Holdings or
any of their subsidiaries or by delivery of purchased shares of Class A Common Stock (which may or may not be held in the treasury of the Corporation or held by any subsidiary thereof). The Corporation and Summit Holdings covenant that all
Class A Common Stock issued upon an Exchange will, upon issuance, be validly issued, fully paid and non-assessable. 
 (b) The
Corporation and Summit Holdings covenant and agree that, to the extent that a registration statement under the Securities Act is effective and available for shares of Class A Common Stock to be delivered with respect to any Exchange, shares
that have been registered under the Securities Act shall be delivered in respect of such Exchange. In the event that any Exchange in accordance with this Agreement is to be effected at a time when any required registration has not become effective
or otherwise is unavailable, upon the request and with the reasonable cooperation of the LP Unitholder requesting such Exchange, the Corporation and Summit Holdings shall use commercially reasonable efforts to promptly facilitate such Exchange
pursuant to any reasonably available exemption from such registration requirements. The Corporation and Summit Holdings shall use commercially reasonable efforts to list the Class A Common Stock required to be delivered upon exchange prior to
such delivery upon each national securities exchange or inter-dealer quotation system upon which the outstanding Class A Common Stock may be listed or traded at the time of such delivery. 

SECTION 2.4. Restrictions. Any restrictions on transfer under any agreements with the Corporation or any of its
subsidiaries to which an exchanging LP Unitholder may be party shall apply, mutatis mutandis, to any shares of Class A Common Stock. 

ARTICLE III 

SECTION 3.1. Additional LP Unitholders. To the extent an LP Unitholder validly transfers any or all of such
holder’s LP Units to another person in a transaction in accordance with, and not in contravention of, the Summit Holdings LP Agreement or any other agreement or agreements with the Corporation or any of its subsidiaries to which a transferring
LP Unitholder may be party, then such transferee (each, a “Permitted Transferee”) shall have the right to execute and deliver a joinder to this Agreement, substantially in the form of Exhibit B hereto, whereupon
such Permitted Transferee shall become an LP Unitholder hereunder. To the extent Summit Holdings issues LP Units in the future, Summit Holdings shall be entitled, in its sole discretion, to make any holder of such LP Units an LP Unitholder hereunder
through such holder’s execution and delivery of a joinder to this Agreement, substantially in the form of Exhibit B hereto. 

 SECTION 3.2. Addresses and Notices. All notices, requests, claims, demands and
other communications hereunder shall be in writing and shall be given (and shall be deemed to have been duly given upon receipt) by delivery in person, by courier service, by fax, by electronic mail (delivery receipt requested) or by registered or
certified mail (postage prepaid, return receipt requested) to the respective parties at the following addresses (or at such other address for a party as shall be as specified in a notice given in accordance with this Section 3.2): 

(a) If to the Corporation, to: 

Summit Materials, Inc. 

1550 Wynkoop, 3rd Floor 

Denver, Colorado 80202 

Attention: Chief Legal Officer 

Fax: (303) 893-6993 

Email: Legal@Summit-Materials.com 

(b) If to Summit Holdings, to: 

Summit Materials Holdings L.P. 

c/o Summit Materials, Inc. 

1550 Wynkoop, 3rd Floor 

Denver, Colorado 80202 

Attention: Chief Legal Officer 

Fax: (303) 893-6993 

Email: Legal@Summit-Materials.com 

(c) If to any LP Unitholder, to the address and other contact information set forth in the records of Summit Holdings from time to time. 

SECTION 3.3. Further Action. The parties shall execute and deliver all documents, provide all information and take or
refrain from taking action as may be necessary or appropriate to achieve the purposes of this Agreement. 
 SECTION 3.4. Binding
Effect. This Agreement shall be binding upon and inure to the benefit of all of the parties and, to the extent permitted by this Agreement, their successors, executors, administrators, heirs, legal representatives and assigns. 

SECTION 3.5. Severability. If any term or other provision of this Agreement is held to be invalid, illegal or
incapable of being enforced by any rule of law, or public policy, all other conditions and provisions of this Agreement shall nevertheless remain in full force and effect so long as the economic or legal substance of the transactions is not affected
in any manner materially adverse to any party. Upon a determination that any term or other provision is invalid, illegal or incapable of being enforced, the parties hereto shall negotiate in good faith to modify this Agreement so as to effect the
original intent of the parties as closely as possible in a mutually acceptable manner in order that the transactions contemplated hereby be consummated as originally contemplated to the fullest extent possible. 

 SECTION 3.6. Amendment. The provisions of this Agreement may be amended only
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. 

SECTION 3.7. Waiver. No failure by any party to insist upon the strict performance of any covenant, duty, agreement or
condition of this Agreement or to exercise any right or remedy consequent upon a breach thereof shall constitute waiver of any such breach of any other covenant, duty, agreement or condition. 

SECTION 3.8. Submission to Jurisdiction; Waiver of Jury Trial. 

(a) Any and all disputes which cannot be settled amicably, including any ancillary claims of any party, arising out of, relating to or in
connection with the validity, negotiation, execution, interpretation, performance or non-performance of this Agreement (including the validity, scope and enforceability of this arbitration provision) shall be
finally settled by arbitration conducted by a single arbitrator in New York in accordance with the then-existing Rules of Arbitration of the International Chamber of Commerce. If the parties to the dispute
fail to agree on the selection of an arbitrator within thirty (30) days of the receipt of the request for arbitration, the International Chamber of Commerce shall make the appointment. The arbitrator shall be a lawyer and shall conduct the
proceedings in the English language. Performance under this Agreement shall continue if reasonably possible during any arbitration proceedings. 

(b) Notwithstanding the provisions of Section 3.8 (a), the parties hereto may bring an action or special proceeding in any court of
competent jurisdiction for the purpose of compelling a party to arbitrate, seeking temporary or preliminary relief in aid of an arbitration hereunder, and/or enforcing an arbitration award and, for the purposes of this Section 3.8(b),
each party hereto (i) expressly consents to the application of Section 3.8 (c) to any such action or proceeding and (ii) agrees that proof shall not be required that monetary damages for breach of the provisions of this
Agreement would be difficult to calculate and that remedies at law would be inadequate. 
 (c)(i) EACH PARTY HERETO IRREVOCABLY SUBMITS TO
THE JURISDICTION OF COURTS LOCATED IN NEW YORK, NEW YORK FOR THE PURPOSE OF ANY JUDICIAL PROCEEDING BROUGHT IN ACCORDANCE WITH THE PROVISIONS OF THIS SECTION 3.8, OR ANY JUDICIAL PROCEEDING ANCILLARY TO AN ARBITRATION OR CONTEMPLATED
ARBITRATION ARISING OUT OF OR RELATING TO OR CONCERNING THIS AGREEMENT. Such ancillary judicial proceedings include any suit, action or proceeding to compel arbitration, to obtain temporary or preliminary judicial relief in aid of arbitration, or to
confirm an arbitration award. The parties acknowledge that the fora designated by this Section 3.8(c) have a reasonable relation to this Agreement and to the parties’ relationship with one another. 

 (ii) The parties hereby waive, to the fullest extent permitted by applicable law, any objection
which they now or hereafter may have to personal jurisdiction or to the laying of venue of any such ancillary suit, action or proceeding brought in any court referred to in this Section 3.8(c), and such parties agree not to plead or
claim the same. 
 SECTION 3.9. Counterparts. This Agreement may be executed and delivered (including by facsimile
transmission or by e-mail delivery of a “.pdf” format data file) in one or more counterparts, and by the different parties hereto in separate counterparts, each of which when executed and delivered shall be deemed to be an original but all
of which taken together shall constitute one and the same agreement. Copies of executed counterparts transmitted by telecopy, by e-mail delivery of a “.pdf” format data file or other electronic transmission service shall be considered
original executed counterparts for purposes of this Section 3.9. 
 SECTION 3.10. Tax Treatment. Solely
for U.S. federal income tax purposes, this Agreement shall be treated as part of the partnership agreement of Summit Holdings as described in Section 761(c) of the Code and Sections 1.704-1(b)(2)(ii)(h) and 1.761-1(c) of the Treasury
Regulations promulgated thereunder. As required by the Code and the Treasury Regulations, the parties shall report any Exchange consummated hereunder as a taxable sale of the LP Units by an LP Unitholder to the Corporation, and no party shall take a
contrary position on any income tax return, amendment thereof or communication with a taxing authority unless an alternate position is permitted under the Code and Treasury Regulations and the Corporation consents in writing. 

SECTION 3.11. Specific Performance. The parties hereto agree that irreparable damage would occur in the event that any
of the provisions of this Agreement were not performed in accordance with its specific terms or were otherwise breached. It is accordingly agreed that the parties shall be entitled to specific performance of the terms and provisions hereof, in
addition to any other remedy to which they are entitled at law or in equity. 
 SECTION 3.12. Independent Nature of LP
Unitholders’ Rights and Obligations. The obligations of each LP Unitholder hereunder are several and not joint with the obligations of any other LP Unitholder, and no LP Unitholder shall be responsible in any way for the
performance of the obligations of any other LP Unitholder hereunder. The decision of each LP Unitholder to enter into to this Agreement has been made by such LP Unitholder independently of any other LP Unitholder. Nothing contained herein, and no
action taken by any LP Unitholder pursuant hereto, shall be deemed to constitute the LP Unitholders as a partnership, an association, a joint venture or any other kind of entity, or create a presumption that the LP Unitholders are in any way acting
in concert or as a group with respect to such obligations or the transactions contemplated hereby. The Corporation acknowledges that the LP Unitholders are not acting in concert or as a group, and the Corporation will not assert any such claim with
respect to such obligations or the transactions contemplated hereby. 
 SECTION 3.13. Applicable Law. This Agreement
shall be governed by, and construed in accordance with, the law of the State of Delaware. 

 [Remainder of Page Intentionally Left Blank] 

 IN WITNESS WHEREOF, the parties have caused this Agreement 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:		/s/ Thomas W. Hill
	Name:		Thomas W. Hill
	Title:		Chief Executive Officer
	
	Financial Sponsor Holders:
	
	BLACKSTONE PARTICIPATION PARTNERSHIP
	(CAYMAN) 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 (CAYMAN) 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

 [Signature Page – Exchange Agreement] 

			
	BLACKSTONE CAPITAL PARTNERS (CAYMAN) 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 (CAYMAN) 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

 [Signature Page – Exchange Agreement] 

			
	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

 [Signature Page – Exchange Agreement] 

			
	Other LP Unitholders:
	
	All other LP Unitholders listed in Annex 1 attached hereto
		
	By:		 /s/ Anne Lee Benedict

	Name:		Anne Lee Benedict
	Title:		Attorney-in-Fact

 [Signature Page – Exchange Agreement] 

 ANNEX 1 

Thomas W. Hill 
 Jane B. Hill, Trustee for The Hill Trust 

Silverhawk Summit, L.P. 
 Gardner Family Investments, LLC 

Charles Goodyear 
 Summit Materials Holding-G, L.L.C. 

Michael J. Brady 
 Robert Price 

Anthony Keenan 
 Anya Fonina Civitella 

Damian J. Murphy 
 Angela Dziubek 

R. Michael Johnson 
 Thomas A. Beck 

M. Shane Evans 
 Val Staker 

Filip Wojcikowski 
 Lane Bybee 

Douglas C. Rauh 
 Clint Pulley 

John R. Murphy 
 Margaret Harris, Trustee of the Harris Family
2014 Trust 
 Kevin A. Gill 
 Jennifer Rose 

Brienne Wode 
 Valerie Barker 

Shannon Neeley 
 Ashley Sakwa 

Anne Lee Benedict 
 Howard L. Lance 

Hinkle Family Assets Holding Company, LLC 
 RMD Investment Group,
L.L.C. 
 K Six, LLC 
 John Ramming 

Lance Townsend 
 William B. Carroll 

Grant D. Shelton 
 Dean K. Lundquist 

James D. Ramming 
 David L. Fuller 

Clyde C. Fuller 
 D’arcy Todd Barten 

Perry Glen Shepard 
 Robert K. Hall 

Mark Buster 
 Bryan Kalbfleisch 

Larry Winkleman 
 Amanda Mohr 

 EXHIBIT A 

[FORM OF] 
 ELECTION OF
EXCHANGE 
 Summit Materials, Inc. 
 1550 Wynkoop, 3rd
Floor 
 Denver, Colorado 80202 
 Attention: Chief Legal Officer

 Summit Materials Holdings L.P. 
 c/o Summit Materials, Inc.

 1550 Wynkoop, 3rd Floor 
 Denver, Colorado 80202 

Attention: Chief Legal Officer 
 Reference is
hereby made to the Exchange Agreement, dated as of March 11, 2015 (the “Exchange Agreement”), among Summit Materials, Inc., a Delaware corporation, Summit Materials Holdings L.P., a Delaware limited partnership, and the
holders of LP Units from time to time party thereto. Capitalized terms used but not defined herein shall have the meanings given to them in the Exchange Agreement. 

The undersigned LP Unitholder hereby transfers to the Corporation, for the account of Summit Holdings, the number of LP Units set forth below
in exchange for shares of Class A Common Stock to be issued in its name as set forth below, as set forth in the Exchange Agreement. 

Legal Name of LP Unitholder:            
                                         
                          

Address:                   
                                         
                                         
                          

Number of LP Units to be exchanged:         
                                         
     
 The undersigned hereby represents and warrants that (i) the undersigned has full legal capacity to
execute and deliver this Election of Exchange and to perform the undersigned’s obligations hereunder; (ii) this Election of Exchange has been duly executed and delivered by the undersigned and is the legal, valid and binding obligation of
the undersigned enforceable against it in accordance with the terms thereof or hereof, as the case may be, subject to applicable bankruptcy, insolvency and similar laws affecting creditors’ rights generally and the availability of equitable
remedies; (iii) the LP Units subject to this Election of Exchange are being transferred to the Corporation free and clear of any pledge, lien, security interest, encumbrance, equities or claim; and (iv) no consent, approval, authorization,
order, registration or qualification of any third party or with any court or governmental agency or body having jurisdiction over the undersigned or the LP Units subject to this Election of Exchange is required to be obtained by the undersigned for
the transfer of such LP Units to the Corporation. 

 The undersigned hereby irrevocably constitutes and appoints any officer of the Corporation or of
Summit Holdings as the attorney of the undersigned, with full power of substitution and resubstitution in the premises, to do any and all things and to take any and all actions that may be necessary to transfer to the Corporation, for the account of
Summit Holdings, the LP Units subject to this Election of Exchange and to deliver to the undersigned the shares of Class A Common Stock to be delivered in exchange therefor. 

IN WITNESS WHEREOF the undersigned, by authority duly given, has caused this Election of Exchange to be executed and delivered by the
undersigned or by its duly authorized attorney. 
  

			
	  

		
	Name:	 	

 
			
		
	      Dated:	 	  

 EXHIBIT B 

[FORM OF] 
 JOINDER
AGREEMENT 
 This Joinder Agreement (“Joinder Agreement”) is a joinder to the Exchange Agreement, dated as of
March 11, 2015 (the “Exchange Agreement”), among Summit Materials, Inc., a Delaware corporation (the “Corporation”), Summit Materials Holdings L.P., a Delaware limited partnership
(“Summit Holdings”), and each of the LP Unitholders from time to time party thereto. Capitalized terms used but not defined in this Joinder Agreement shall have their meanings given to them in the Exchange Agreement. This
Joinder Agreement shall be governed by, and construed in accordance with, the law of the State of Delaware. In the event of any conflict between this Joinder Agreement and the Exchange Agreement, the terms of this Joinder Agreement shall control.

 The undersigned hereby joins and enters into the Exchange Agreement having acquired LP Units in Summit Holdings. By signing and returning
this Joinder Agreement to the Corporation, the undersigned accepts and agrees to be bound by and subject to all of the terms and conditions of and agreements of an LP Unitholder contained in the Exchange Agreement, with all attendant rights, duties
and obligations of an LP Unitholder thereunder. The parties to the Exchange Agreement shall treat the execution and delivery hereof by the undersigned as the execution and delivery of the Exchange Agreement by the undersigned and, upon receipt of
this Joinder Agreement by the Corporation and by Summit Holdings, the signature of the undersigned set forth below shall constitute a counterpart signature to the signature page of the Exchange Agreement. 

 

			
	Name:                                     
                                 		
		
	Address for Notices:		With copies to:
	  
		  

		
	  
		  

		
	  
		  

		
	Attention:EX-10.3

 Exhibit 10.3 

TAX RECEIVABLE AGREEMENT 

between 
 SUMMIT
MATERIALS, INC. 
 and 

THE PERSONS NAMED HEREIN 

Dated as of March 11, 2015 

 TABLE OF CONTENTS 
  

							
	 	 	 	  	Page	 
	 ARTICLE I DEFINITIONS
	  	 	2	  
			
	 Section 1.1
	 	Definitions	  	 	2	  
		
	ARTICLE II DETERMINATION OF CERTAIN REALIZED TAX BENEFIT	  	 	10	  
			
	 Section 2.1
	 	Basis Adjustment	  	 	10	  
	 Section 2.2
	 	Tax Benefit Schedule	  	 	10	  
	 Section 2.3
	 	Procedures, Amendments	  	 	11	  
		
	ARTICLE III TAX BENEFIT PAYMENTS	  	 	12	  
			
	 Section 3.1
	 	Payments	  	 	12	  
	 Section 3.2
	 	No Duplicative Payments	  	 	14	  
	 Section 3.3
	 	Pro Rata Payments	  	 	14	  
		
	ARTICLE IV TERMINATION	  	 	14	  
			
	 Section 4.1
	 	Early Termination of Agreement; Breach of Agreement	  	 	14	  
	 Section 4.2
	 	Early Termination Notice	  	 	16	  
	 Section 4.3
	 	Payment upon Early Termination	  	 	16	  
		
	ARTICLE V SUBORDINATION AND LATE PAYMENTS	  	 	17	  
			
	 Section 5.1
	 	Subordination	  	 	17	  
	 Section 5.2
	 	Late Payments by the Corporate Taxpayer	  	 	17	  
		
	ARTICLE VI NO DISPUTES; CONSISTENCY; COOPERATION	  	 	17	  
			
	 Section 6.1
	 	Participation in the Corporate Taxpayer’s and OpCo’s Tax Matters	  	 	17	  
	 Section 6.2
	 	Consistency	  	 	18	  
	 Section 6.3
	 	Cooperation	  	 	18	  
		
	ARTICLE VII MISCELLANEOUS	  	 	18	  
			
	 Section 7.1
	 	Notices	  	 	18	  
	 Section 7.2
	 	Counterparts	  	 	19	  
	 Section 7.3
	 	Entire Agreement; No Third Party Beneficiaries	  	 	19	  
	 Section 7.4
	 	Governing Law	  	 	19	  
	 Section 7.5
	 	Severability	  	 	19	  
	 Section 7.6
	 	Successors; Assignment; Amendments; Waivers	  	 	19	  
	 Section 7.7
	 	Titles and Subtitles	  	 	20	  
	 Section 7.8
	 	Resolution of Disputes	  	 	20	  
	 Section 7.9
	 	Reconciliation	  	 	21	  
	 Section 7.10
	 	Withholding	  	 	22	  
	 Section 7.11
	 	Admission of the Corporate Taxpayer into a Consolidated Group; Transfers of Corporate Assets	  	 	22	  
	 Section 7.12
	 	Confidentiality	  	 	23	  
	 Section 7.13
	 	Change in Law	  	 	23	  

  
 i 

 TAX RECEIVABLE AGREEMENT 

This TAX RECEIVABLE AGREEMENT (this “Agreement”), is dated as of March 11, 2015, and is between
Summit Materials, Inc., a Delaware corporation (including any successor corporation, the “Corporate Taxpayer”), each of the undersigned parties, and each of the other persons from time to time party hereto (each a “TRA
Party” and together the “TRA Parties”). 
 RECITALS 

WHEREAS, the TRA Parties (other than the Existing Shareholders Representative (as defined below)) directly or indirectly hold limited
partner interests (the “Units”) in Summit Materials Holdings L.P., a Delaware limited partnership (“OpCo”), which is classified as a partnership for United States federal income tax purposes; 

WHEREAS, the Corporate Taxpayer is the general partner of OpCo, and holds and will hold, directly and/or indirectly, Units; 

WHEREAS, the Units held by the TRA Parties may be exchanged for Class A common stock (the “Class A
Shares”) of the Corporate Taxpayer, in accordance with and subject to the provisions of the LP Agreement (as defined below) and the Exchange Agreement (as defined below), dated as of March 11, 2015, between the Corporate Taxpayer,
OpCo and the holders of Units from time to time party thereto; 
 WHEREAS, OpCo and each of its direct and indirect Subsidiaries (as
defined below) treated as a partnership for United States federal income tax purposes currently have and will have in effect an election under Section 754 of the United States Internal Revenue Code of 1986, as amended (the
“Code”), for each Taxable Year (as defined below) in which a taxable acquisition (including a deemed taxable acquisition under Section 707(a) of the Code) of Units by the Corporate Taxpayer from any of the TRA Parties
for Class A Shares or other consideration (an “Exchange”) occurs;  
 WHEREAS, the income, gain,
loss, expense and other Tax (as defined below) items of the Corporate Taxpayer may be affected by the Basis Adjustments (as defined below) and the Imputed Interest (as defined below); 

WHEREAS, the parties to this Agreement desire to make certain arrangements with respect to the effect of the Basis Adjustments and
Imputed Interest on the liability for Taxes of the Corporate Taxpayer; 
 WHEREAS, Exchanges by the TRA Parties and payments in
respect of Tax savings related to such Exchanges are expected to result in Tax savings for the Corporate Taxpayer; and 
 WHEREAS,
the Corporate Taxpayer may achieve Tax savings as a result of becoming entitled to Pre-Merger NOLs of a Blocker TRA Party upon completion of any Blocker TRA Party Merger (each as defined below). 

  
 1 

 NOW, THEREFORE, in consideration of the foregoing and the respective covenants and
agreements set forth herein, and intending to be legally bound hereby, the parties hereto agree as follows: 
 ARTICLE I 

DEFINITIONS 

Section 1.1 Definitions. As used in this Agreement, the terms set forth in this Article I shall have the following meanings
(such meanings to be equally applicable to both the singular and plural forms of the terms defined). 
 “Affiliate”
means, with respect to any Person, any other Person that directly or indirectly, through one or more intermediaries, Controls, is Controlled by, or is under common Control with, such first Person.  

“Agreed Rate” means LIBOR plus 100 basis points. 

“Agreement” is defined in the Preamble to this Agreement. 

“Amended Schedule” is defined in Section 2.3(b) of this Agreement. 

“Basis Adjustment” means the adjustment to the tax basis of a Reference Asset under Sections 732, 734(b) and 1012 of
the Code (in situations where, as a result of one or more Exchanges, OpCo becomes an entity that is disregarded as separate from its owner for United States federal income tax purposes) or under Sections 734(b), 743(b) and 754 of the Code (in
situations where, following an Exchange, OpCo remains in existence as an entity treated as a partnership for United States federal income tax purposes) and, in each case, comparable sections of state and local tax laws, as a result of an Exchange
and the payments made pursuant to this Agreement. For the avoidance of doubt, the amount of any Basis Adjustment resulting from an Exchange of one or more Units shall be determined without regard to any Pre-Exchange Transfer of such Units and as if
any such Pre-Exchange Transfer had not occurred. 
 A “Beneficial Owner” of a security is a Person who directly or
indirectly, through any contract, arrangement, understanding, relationship or otherwise, has or shares: (i) voting power, which includes the power to vote, or to direct the voting of, such security; and/or (ii) investment power, which
includes the power to dispose of, or to direct the disposition of, such security. The terms “Beneficially Own” and “Beneficial Ownership” shall have correlative meanings. 

“Blocker TRA Parties” means Blackstone SMT Feeder Fund V L.P., a Delaware limited partnership, Blackstone SMT Feeder
Fund (Cayman) V L.P., a Cayman Islands limited partnership, Blackstone SMT Feeder Fund V-AC, a Delaware limited partnership and Blackstone SMT Feeder Fund (Cayman) V-AC L.P., a Cayman Islands limited partnership. 

“Blocker TRA Party Merger” means either the merger of a Blocker TRA Party with and into the Corporate Taxpayer, with
the Corporate Taxpayer surviving, or the contribution of all of the stock of a Blocker TRA Party to the Corporate Taxpayer in exchange for stock of the Corporate Taxpayer. 

  
 2 

 “Board” means the Board of Directors of the Corporate Taxpayer. 

 “Business Day” means Monday through Friday of each week, except that a legal holiday recognized as such by the
government of the United States of America or the State of New York shall not be regarded as a Business Day. 
 “Change of
Control” means the occurrence of any of the following events: 
  

	 	(i)	any Person or any group of Persons acting together that would constitute a “group” for purposes of Section 13(d) of the Securities and Exchange Act of 1934, or any successor provisions thereto (excluding
(a) a corporation or other entity owned, directly or indirectly, by the stockholders of the Corporate Taxpayer in substantially the same proportions as their ownership of stock of the Corporate Taxpayer or (b) a group of Persons in which
one or more Affiliates of Permitted Investors, directly or indirectly hold Beneficial Ownership of securities representing more than 50% of the total voting power held by such group) is or becomes the Beneficial Owner, directly or indirectly, of
securities of the Corporate Taxpayer representing more than 50% of the combined voting power of the Corporate Taxpayer’s then outstanding voting securities; or 

 

	 	(ii)	the following individuals cease for any reason to constitute a majority of the number of directors of the Corporate Taxpayer then serving: individuals who, on the IPO Date, constitute the Board and any new director
whose appointment or election by the Board or nomination for election by the Corporate Taxpayer’s shareholders was approved or recommended by a vote of at least two-thirds (2/3) of the directors then still in office who either were
directors on the IPO Date or whose appointment, election or nomination for election was previously so approved or recommended by the directors referred to in this clause (ii); or 

 

	 	(iii)	there is consummated a merger or consolidation of the Corporate Taxpayer with any other corporation or other entity, and, immediately after the consummation of such merger or consolidation, either (x) the Board
immediately prior to the merger or consolidation does not constitute at least a majority of the board of directors of the company surviving the merger or, if the surviving company is a Subsidiary, the ultimate parent thereof, or (y) the voting
securities of the Corporate Taxpayer immediately prior to such merger or consolidation do not continue to represent or are not converted into more than 50% of the combined voting power of the then outstanding voting securities of the Person
resulting from such merger or consolidation or, if the surviving company is a Subsidiary, the ultimate parent thereof; or 

  
 3 

	 	(iv)	the shareholders of the Corporate Taxpayer approve a plan of complete liquidation or dissolution of the Corporate Taxpayer or there is consummated an agreement or series of related agreements for the sale, lease or
other disposition, directly or indirectly, by the Corporate Taxpayer of all or substantially all of the Corporate Taxpayer’s assets, other than such sale or other disposition by the Corporate Taxpayer of all or substantially all of the
Corporate Taxpayer’s assets to an entity at least 50% of the combined voting power of the voting securities of which are owned by shareholders of the Corporate Taxpayer in substantially the same proportions as their ownership of the Corporate
Taxpayer immediately prior to such sale. 

 Notwithstanding the foregoing, except with respect to clause (ii) and clause (iii)(x) above,
a “Change of Control” shall not be deemed to have occurred by virtue of the consummation of any transaction or series of integrated transactions immediately following which the record holders of the shares of the Corporate Taxpayer
immediately prior to such transaction or series of transactions continue to have substantially the same proportionate ownership in, and own substantially all of the shares of, an entity which owns all or substantially all of the assets of the
Corporate Taxpayer immediately following such transaction or series of transactions. 
 “Class A Shares” is defined
in the Recitals of this Agreement. 
 “Code” is defined in the Recitals of this Agreement. 

“Control” means the possession, direct or indirect, of the power to direct or cause the direction of the management
and policies of a Person, whether through ownership of voting securities, by contract or otherwise. 
 “Corporate
Taxpayer” is defined in the Preamble to this Agreement; provided that the term “Corporate Taxpayer” shall include any company that is a member of any consolidated tax return of which Summit Materials, Inc. is the common
parent, where appropriate. 
 “Corporate Taxpayer Return” means the federal and/or state and/or local Tax Return, as
applicable, of the Corporate Taxpayer filed with respect to Taxes of any Taxable Year. 
 “Cumulative Net Realized Tax
Benefit” for a Taxable Year means the cumulative amount of Realized Tax Benefits for all Taxable Years of the Corporate Taxpayer, up to and including such Taxable Year, net of the cumulative amount of Realized Tax Detriments for the
same period. The Realized Tax Benefit and Realized Tax Detriment for each Taxable Year shall be determined based on the most recent Tax Benefit Schedules or Amended Schedules, if any, in existence at the time of such determination. 

“Cumulative NOL Net Realized Tax Benefit” for a Taxable Year means the cumulative amount of NOL Realized Tax Benefits
for all Taxable Years of the Corporate Taxpayer, up to and including such Taxable Year. The NOL Realized Tax Benefit for each 

  
 4 

 
Taxable Year shall be determined based on the most recent Tax Benefit Schedules or Amended Schedules, if any, in existence at the time of such determination. 

“Default Rate” means LIBOR plus 500 basis points. 

“Determination” shall have the meaning ascribed to such term in Section 1313(a) of the Code or similar provision
of state, foreign or local tax law, as applicable, or any other event (including the execution of IRS Form 870-AD) that finally and conclusively establishes the amount of any liability for Tax. 

“Dispute” has the meaning set forth in Section 7.8(a) of this Agreement. 

“Early Termination Date” means the date of an Early Termination Notice for purposes of determining the Early
Termination Payment. 
 “Early Termination Effective Date” means the date on which an Early Termination Schedule
becomes binding pursuant to Section 4.2. 
 “Early Termination Notice” is defined in Section 4.2 of this
Agreement. 
 “Early Termination Schedule” is defined in Section 4.2 of this Agreement.  

“Early Termination Payment” is defined in Section 4.3(b) of this Agreement. 

“Early Termination Rate” means LIBOR plus 100 basis points. 

“Exchange” is defined in the Recitals of this Agreement. 

“Exchange Agreement” means the Exchange Agreement, dated on or about the date hereof, between the Corporate Taxpayer,
OpCo and the holders of Units from time to time party thereto, as amended from time to time. 
 “Exchange Basis
Schedule” is defined in Section 2.1 of this Agreement. 
 “Exchange Date” means the date of any
Exchange. 
 “Exchange Notice” means a notice delivered pursuant to Section 2.1(b) of the Exchange Agreement.

 “Existing Shareholder” means an equity holder of a Blocker TRA Party at the time of a Blocker TRA Party Merger.

 “Existing Shareholders Representative” means Blackstone Management Associates (Cayman) V-NQ L.P.. 

“Expert” is defined in Section 7.9 of this Agreement. 

“Hypothetical Tax Liability” means, with respect to any Taxable Year, the liability for Taxes of (i) the
Corporate Taxpayer and (ii) without duplication, OpCo, but only 

  
 5 

 
with respect to Taxes imposed on OpCo and allocable to the Corporate Taxpayer, in each case using the same methods, elections, conventions and similar practices used on the relevant Corporate
Taxpayer Return, but (a) without taking into account Pre-Merger NOLs, if any, (b) using the Non-Stepped Up Tax Basis as reflected on the Exchange Basis Schedule including amendments thereto for the Taxable Year and (c) excluding any
deduction attributable to Imputed Interest in respect of an Exchange for the Taxable Year. For the avoidance of doubt, Hypothetical Tax Liability shall be determined without taking into account the carryover or carryback of any Tax item (or portions
thereof) that is attributable to a Basis Adjustment, or Pre-Merger NOLs or Imputed Interest, as applicable. 
 “Imputed
Interest” in respect of a TRA Party shall mean any interest imputed under Section 1272, 1274 or 483 or other provision of the Code and any similar provision of state and local tax law with respect to the Corporate Taxpayer’s
payment obligations in respect of such TRA Party under this Agreement. 
 “IPO” means the initial public offering of
Class A Shares by the Corporate Taxpayer. 
 “IPO Date” means the closing date of the IPO. 

“IRS” means the United States Internal Revenue Service. 

“LIBOR” means during any period, an interest rate per annum equal to the one-year LIBOR reported, on the date two days
prior to the first day of such period, on the Telerate Page 3750 (or if such screen shall cease to be publicly available, as reported on Reuters Screen page “LIBOR01” or by any other publicly available source of such market rate) for
London interbank offered rates for United States dollar deposits for such period. 
 “LP Agreement” means, with
respect to OpCo, the Fourth Amended and Restated Limited Partnership Agreement of OpCo, dated on or about the date hereof, as amended from time to time. 

“Market Value” shall mean the closing price of the Class A Shares on the applicable Exchange Date on the national
securities exchange or interdealer quotation system on which such Class A Shares are then traded or listed, as reported by the Wall Street Journal; provided, that if the closing price is not reported by the Wall Street
Journal for the applicable Exchange Date, then the Market Value shall mean the closing price of the Class A Shares on the Business Day immediately preceding such Exchange Date on the national securities exchange or interdealer quotation
system on which such Class A Shares are then traded or listed, as reported by the Wall Street Journal; provided, further, that if the Class A Shares are not then listed on a national securities exchange or interdealer
quotation system, “Market Value” shall mean the cash consideration paid for Class A Shares, or the fair market value of the other property delivered for Class A Shares, as determined by the Board in good faith. 

“Material Objection Notice” has the meaning set forth in Section 4.2 of this Agreement. 

  
 6 

 “NOL Interest Amount” has the meaning set forth in Section 3.1(c) of
this Agreement. 
 “NOL Realized Tax Benefit” means, for a Taxable Year, the excess, if any, of the Non-NOL Tax
Liability over the Hypothetical Tax Liability of (i) the Corporate Taxpayer and (ii) without duplication, OpCo, but only with respect to Taxes imposed on OpCo and allocable to the Corporate Taxpayer. If all or a portion of the actual
liability for such Taxes for the Taxable Year arises as a result of an audit by a Taxing Authority of any Taxable Year, such liability shall not be included in determining the NOL Realized Tax Benefit unless and until there has been a Determination.

 “NOL Tax Benefit” has the meaning set forth in Section 3.1(c) of this Agreement. 

“NOL Tax Benefit Payment” has the meaning set forth in Section 3.1(c) of this Agreement. 

“Non-NOL Tax Liability” means, with respect to any Taxable Year (or portion thereof) following a Blocker TRA Party
Merger, the liability for Taxes of (i) the Corporate Taxpayer and (ii) without duplication, OpCo, but only with respect to Taxes imposed on OpCo and allocable to the Corporate Taxpayer, in each case using the same methods, elections,
conventions and similar practices used on the relevant Corporate Taxpayer Return, but (a) without taking into account Pre-Merger NOLs, if any, (b) using the Non-Stepped Up Tax Basis as reflected on the Exchange Basis Schedule including
amendments thereto for the Taxable Year and (c) excluding any deduction attributable to Imputed Interest for the Taxable Year. For the avoidance of doubt, Non-NOL Tax Liability shall be determined without taking into account the carryover or
carryback of any Tax item (or portions thereof) that is attributable to a Basis Adjustment, Pre-Merger NOLs or Imputed Interest, as applicable 

“Non-Stepped Up Tax Basis” means, with respect to any Reference Asset at any time, the Tax basis that such asset would
have had at such time if no Basis Adjustments had been made. 
 “Objection Notice” has the meaning set forth in
Section 2.3(a) of this Agreement. 
 “Payment Date” means any date on which a payment is required to be made
pursuant to this Agreement. 
 “Permitted Investors” means investment funds managed by The Blackstone Group L.P. or
any of their Affiliates. 
 “Person” means any individual, corporation, firm, partnership, joint venture, limited
liability company, estate, trust, business association, organization, governmental entity or other entity. 
 “Pre-Exchange
Transfer” means any transfer (including upon the death of a Member) or distribution in respect of one or more Units (i) that occurs prior to an Exchange of such Units, and (ii) to which Section 743(b) or 734(b) of the
Code applies. 

  
 7 

 “Pre-Merger NOLs” means, without duplication, the net operating losses,
capital losses, charitable deductions, foreign tax credits and AMT credit carryforwards that the Corporate Taxpayer is entitled to utilize as a result of any Blocker TRA Party Merger that relate to periods (or portions thereof) prior to such Blocker
TRA Party Merger; provided, however, that in order to determine whether any such Tax attribute is a Pre-Merger NOL, the Taxable Year of the Corporate Taxpayer that includes the effective date of the relevant Blocker TRA Party Merger shall be deemed
to end as of the close of such effective date. Notwithstanding the foregoing, the term “Pre-Merger NOL” shall not include any Tax attribute of a Blocker TRA Party that is used to offset Taxes of the Blocker TRA Party, if such offset Taxes
are attributable to taxable periods (or portion thereof) ending on or prior to the date of the applicable Blocker TRA Party Merger. 

“Realized Tax Benefit” means, for a Taxable Year, the excess, if any, of the Hypothetical Tax Liability over the
actual liability for Taxes of (i) the Corporate Taxpayer and (ii) without duplication, OpCo, but only with respect to Taxes imposed on OpCo and allocable to the Corporate Taxpayer. If all or a portion of the actual liability for such
Taxes for the Taxable Year arises as a result of an audit by a Taxing Authority of any Taxable Year, such liability shall not be included in determining the Realized Tax Benefit unless and until there has been a Determination. 

“Realized Tax Detriment” means, for a Taxable Year, the excess, if any, of the actual liability for Taxes of
(i) the Corporate Taxpayer and (ii) without duplication, OpCo, but only with respect to Taxes imposed on OpCo and allocable to the Corporate Taxpayer, over the Hypothetical Tax Liability. If all or a portion of the actual liability for
such Taxes for the Taxable Year arises as a result of an audit by a Taxing Authority of any Taxable Year, such liability shall not be included in determining the Realized Tax Detriment unless and until there has been a Determination. 

“Reconciliation Dispute” is defined in Section 7.9 of this Agreement. 

“Reconciliation Procedures” is defined in Section 2.3(a) of this Agreement. 

“Reference Asset” means an asset that is held by OpCo, or by any of its direct or indirect Subsidiaries treated as a
partnership or disregarded entity (but only if such indirect Subsidiaries are held only through Subsidiaries treated as partnerships or disregarded entities) for purposes of the applicable Tax, at the time of an Exchange. A Reference Asset also
includes any asset that is “substituted basis property” under Section 7701(a)(42) of the Code with respect to a Reference Asset. 

“Schedule” means any of the following: (i) an Exchange Basis Schedule; (ii) a Tax Benefit Schedule; or
(iii) the Early Termination Schedule. 
 “Senior Obligations” is defined in Section 5.1 of this Agreement.

 “Subsidiaries” means, with respect to any Person, as of any date of determination, any other Person as to which
such Person, owns, directly or indirectly, or otherwise controls more than 50% of the voting power or other similar interests or the sole general partner interest or managing member or similar interest of such Person. 

  
 8 

 “Tax Benefit Payment” is defined in Section 3.1(b) of this
Agreement. 
 “Tax Benefit Schedule” is defined in Section 2.2 of this Agreement. 

“Tax Return” means any return, declaration, report or similar statement required to be filed with respect to Taxes
(including any attached schedules), including, without limitation, any information return, claim for refund, amended return and declaration of estimated Tax. 

“Taxable Year” means a taxable year of the Corporate Taxpayer as defined in Section 441(b) of the Code or
comparable section of state or local tax law, as applicable (and, therefore, for the avoidance of doubt, may include a period of less than 12 months for which a Tax Return is made), ending on or after the IPO Date. 

“Taxes” means any and all United States federal, state, local and foreign taxes, assessments or similar charges that
are based on or measured with respect to net income or profits, and any interest related to such Tax. 
 “Taxing
Authority” shall mean any domestic, federal, national, state, county or municipal or other local government, any subdivision, agency, commission or authority thereof, or any quasi-governmental body exercising any taxing authority or any
other authority exercising Tax regulatory authority. 
 “TRA Party” is defined in the Preamble to this Agreement.

 “TRA Party Representative” means, initially, Blackstone Capital Partners (Cayman) V-NQ L.P., and thereafter, that
TRA Party or committee of TRA Parties determined from time to time by a plurality vote of the TRA Parties ratably in accordance with their right to receive Early Termination Payments hereunder if all TRA Parties had fully Exchanged their Units for
Class A Shares or other consideration and the Corporate Taxpayer had exercised its right of early termination on the date of the most recent Exchange. 

“Treasury Regulations” means the final, temporary and proposed regulations under the Code promulgated from time to
time (including corresponding provisions and succeeding provisions) as in effect for the relevant taxable period. 

“Units” is defined in the Recitals of this Agreement. 

“Valuation Assumptions” shall mean, as of an Early Termination Date, the assumptions that in each Taxable Year ending
on or after such Early Termination Date, (1) the Corporate Taxpayer will have taxable income sufficient to fully utilize the deductions arising from the Basis Adjustments and the Imputed Interest during such Taxable Year or future Taxable Years
(including, for the avoidance of doubt, Basis Adjustments and Imputed Interest that would result from future Tax Benefit Payments that would be paid in accordance with the Valuation Assumptions) in which such deductions would become available,
(2) any Pre-Merger 

  
 9 

 
NOLs or loss carryovers generated by deductions arising from Basis Adjustments or Imputed Interest that are available as of the date of such Early Termination Date will be used by the Corporate
Taxpayer on a pro rata basis from the date of such Early Termination Date through the earlier of (x) the scheduled expiration date under applicable Tax law of such Pre-Merger NOLs or loss carryovers or (y) the fifth (5th) anniversary
of the Early Termination Date, (3) the United States federal, state and local income tax rates that will be in effect for each such Taxable Year will be those specified for each such Taxable Year by the Code and other law as in effect on the
Early Termination Date, (4) any non-amortizable assets will be disposed of on the fifteenth (15th) anniversary of the applicable Basis Adjustment and any cash equivalents will be disposed of twelve (12) months following the Early
Termination Date; provided, that in the event of a Change of Control, such non-amortizable assets shall be deemed disposed of at the time of sale (if applicable) of the relevant asset in the Change of Control (if earlier than such fifteenth
(15th) anniversary) and (5) if, at the Early Termination Date, there are Units that have not been Exchanged, then each such Unit shall be deemed Exchanged for the Market Value of the Class A Shares and the amount of cash that would be
transferred if the Exchange occurred on the Early Termination Date. 
 ARTICLE II 

DETERMINATION OF CERTAIN REALIZED TAX BENEFIT 

Section 2.1 Basis Adjustment. Within ninety (90) calendar days after the filing of the United States federal income
tax return of the Corporate Taxpayer for each Taxable Year in which an Exchange has been effected by any TRA Party, the Corporate Taxpayer shall deliver to such TRA Party a schedule (the “Exchange Basis Schedule”) that shows,
in reasonable detail necessary to perform the calculations required by this Agreement (i) the Non-Stepped Up Tax Basis of the Reference Assets in respect of such TRA Party as of each applicable Exchange Date, (ii) the Basis Adjustment with
respect to the Reference Assets in respect of such TRA Party as a result of the Exchanges effected in such Taxable Year by such TRA Party, calculated in the aggregate, (iii) the period (or periods) over which the Reference Assets in respect of
such TRA Party are amortizable and/or depreciable and (iv) the period (or periods) over which each Basis Adjustment in respect of such TRA Party is amortizable and/or depreciable. 

Section 2.2 Tax Benefit Schedule. 

(a) Tax Benefit Schedule. Within ninety (90) calendar days after the filing of the United States federal income tax return of the
Corporate Taxpayer for any Taxable Year in which there is a Realized Tax Benefit, an NOL Realized Tax Benefit or a Realized Tax Detriment in respect of such TRA Party (or, following a Blocker TRA Party Merger, an Existing Shareholder), the Corporate
Taxpayer shall provide to such TRA Party (or, in the case of an Existing Shareholder, the Existing Shareholders Representative) a schedule showing, in reasonable detail, the calculation of the Tax Benefit Payment or NOL Tax Benefit Payment in
respect of such TRA Party or Existing Shareholder for such Taxable Year (a “Tax Benefit Schedule”). Each Tax Benefit Schedule will become final as provided in Section 2.3(a) and may be amended as provided in
Section 2.3(b) (subject to the procedures set forth in Section 2.3(b)).

  
 10 

 (b) Applicable Principles. Subject to Section 3.3(a), the Realized Tax Benefit, NOL
Realized Tax Benefit or Realized Tax Detriment for each Taxable Year is intended to measure the decrease or increase in the actual liability for Taxes of the Corporate Taxpayer for such Taxable Year attributable to the Basis Adjustments, any
Pre-Merger NOLs and Imputed Interest, determined using a “with and without” methodology. Carryovers or carrybacks of any Pre-Merger NOLs, Tax item attributable to the Basis Adjustments and Imputed Interest shall be considered to be subject
to the rules of the Code and the Treasury Regulations or the appropriate provisions of U.S. state and local income and franchise tax law, as applicable, governing the use, limitation and expiration of carryovers or carrybacks of the relevant type.
If a carryover or carryback of any Tax item includes a portion that is attributable to any Pre-Merger NOLs, Basis Adjustments or Imputed Interest and another portion that is not, such portions shall be considered to be used in accordance with the
“with and without” methodology. The parties agree that (i) all Tax Benefit Payments attributable to the Basis Adjustments (other than Imputed Interest) will be treated as subsequent upward purchase price adjustments that have the
effect of creating additional Basis Adjustments to Reference Assets for the Corporate Taxpayer in the year of payment, (ii) as a result, such additional Basis Adjustments will be incorporated into the current year calculation and into future
year calculations, as appropriate, (iii) all NOL Tax Benefits Payments (other than Imputed Interest) will be treated as subsequent upward purchase price adjustments in the applicable Blocker TRA Party Merger and (iv) the actual liability
for Taxes will take into account the deduction of the portion of the Tax Benefit Payment or NOL Tax Benefit Payment that must be accounted for as Imputed Interest. 

Section 2.3 Procedures, Amendments. 

(a) Procedure. Every time the Corporate Taxpayer delivers to a TRA Party an applicable Schedule under this Agreement, including any
Amended Schedule delivered pursuant to Section 2.3(b), and any Early Termination Schedule or amended Early Termination Schedule, the Corporate Taxpayer shall also (x) deliver to such TRA Party supporting schedules and work papers, as
determined by the Corporate Taxpayer or as reasonably requested by such TRA Party, providing reasonable detail regarding data and calculations that were relevant for purposes of preparing the Schedule and (y) allow such TRA Party reasonable
access at no cost to the appropriate representatives at the Corporate Taxpayer, as determined by the Corporate Taxpayer or as reasonably requested by such TRA Party, in connection with a review of such Schedule. Without limiting the generality of
the preceding sentence, the Corporate Taxpayer shall ensure that any Tax Benefit Schedule that is delivered to a TRA Party, along with any supporting schedules and work papers, provides a reasonably detailed presentation of the calculation of the
actual liability of the Corporate Taxpayer for Taxes, the Hypothetical Tax Liability, and the Non-NOL Tax Liability, and identifies any material assumptions or operating procedures or principles that were used for purposes of such calculations. An
applicable Schedule or amendment thereto shall become final and binding on all parties thirty (30) calendar days from the date on which all relevant TRA Parties are treated as having received the applicable Schedule or amendment thereto under
Section 7.1 unless the TRA Party Representative (i) within thirty (30) calendar days from such date provides the Corporate Taxpayer with notice of a material objection to such Schedule (“Objection Notice”) made in
good faith or (ii) provides a written waiver of such right of any Objection Notice within the period described in clause (i) above, in which case such Schedule or amendment thereto becomes binding on the date the waiver is received by the
Corporate Taxpayer. If the Corporate Taxpayer and the TRA Party Representative, for any 

  
 11 

 
reason, are unable to successfully resolve the issues raised in the Objection Notice within thirty (30) calendar days after receipt by the Corporate Taxpayer of an Objection Notice, the
Corporate Taxpayer and the TRA Party Representative shall employ the reconciliation procedures as described in Section 7.9 of this Agreement (the “Reconciliation Procedures”). The TRA Party Representative will fairly
represent the interests of each of the TRA Parties and shall timely raise and pursue, in accordance with this Section 2.3(a), any reasonable objection to a Schedule or amendment thereto timely communicated in writing to the TRA Party
Representative by a TRA Party. 
 (b) Amended Schedule. The applicable Schedule for any Taxable Year may be amended from time to time
by the Corporate Taxpayer (i) in connection with a Determination affecting such Schedule, (ii) to correct inaccuracies in the Schedule identified as a result of the receipt of additional factual information relating to a Taxable Year after
the date the Schedule was provided to a TRA Party, (iii) to comply with the Expert’s determination under the Reconciliation Procedures, (iv) to reflect a change in the Realized Tax Benefit, NOL Realized Tax Benefit or Realized Tax
Detriment for such Taxable Year attributable to a carryback or carryforward of a loss or other tax item to such Taxable Year, (v) to reflect a change in the Realized Tax Benefit, NOL Realized Tax Benefit or Realized Tax Detriment for such
Taxable Year attributable to an amended Tax Return filed for such Taxable Year, or (vi) to adjust an applicable Exchange Basis Schedule to take into account payments made pursuant to this Agreement (any such Schedule, an “Amended
Schedule”). The Corporate Taxpayer shall provide an Amended Schedule to each TRA Party within thirty (30) calendar days of the occurrence of an event referenced in clauses (i) through (vi) of the preceding sentence. 

(c) In connection with any Blocker TRA Party Merger, in addition to the consideration otherwise received by the Existing Shareholders from the
Corporate Taxpayer as a result of such Blocker TRA Party Merger, the Corporate Taxpayer shall transfer (or shall cause to be transferred) to each Existing Shareholder, an interest under this Agreement equivalent to the Existing Shareholder’s
pro rata portion of the interest in this Agreement held by such Blocker TRA Party at the effective time of such Blocker TRA Party Merger. 

ARTICLE III 

TAX BENEFIT PAYMENTS 

Section 3.1 Payments. 

(a) Payments. Within five (5) calendar days after a Tax Benefit Schedule delivered to a TRA Party (or Existing Shareholders
Representative) becomes final in accordance with Section 2.3(a), the Corporate Taxpayer shall pay such TRA Party (or Existing Shareholder Representative, which shall pay to the applicable Existing Shareholder) for such Taxable Year (i) the
Tax Benefit Payment determined pursuant to Section 3.1(b) that is allocable to such TRA Party, and/or (ii) the NOL Tax Benefit Payment determined pursuant to Section 3.1(c) that is allocable to such Existing Shareholder. Each
such Tax Benefit Payment or NOL Tax Benefit Payment shall be made by wire transfer of immediately available funds to the bank account previously designated by such TRA Party to the Corporate Taxpayer or as otherwise agreed by the Corporate Taxpayer
and such TRA Party. For the avoidance of doubt, (x) no Tax Benefit 

  
 12 

 
Payment or NOL Tax Benefit Payment shall be made in respect of estimated tax payments, including, without limitation, federal estimated income tax payments and (y) the payments provided for
pursuant to clause (i) of the above sentence shall be computed separately for each Exchange. 
 (b) A “Tax Benefit
Payment” in respect of a TRA Party for a Taxable Year means an amount, not less than zero, equal to the sum of the portion of the Net Tax Benefit that is allocable to such TRA Party and the Interest Amount with respect thereto. For the
avoidance of doubt, for Tax purposes, the Interest Amount shall not be treated as interest but instead shall be treated as additional consideration for the acquisition of Units in Exchanges, unless otherwise required by law. Subject to
Section 3.3(a), the “Net Tax Benefit” for a Taxable Year shall be an amount equal to the excess, if any, of 85% of the Cumulative Net Realized Tax Benefit as of the end of such Taxable Year, over the total amount of
payments previously made under clause (i) of the first sentence of Section 3.1(a) (excluding payments attributable to Interest Amounts); provided, for the avoidance of doubt, that no such recipient shall be required to return any
portion of any previously made Tax Benefit Payment. The “Interest Amount” shall equal the interest on the Net Tax Benefit calculated at the Agreed Rate from the due date (without extensions) for filing the Corporate Taxpayer
Return with respect to Taxes for such Taxable Year until the payment date under Section 3.1(a). The Net Tax Benefit and the Interest Amount shall be determined separately with respect to each Exchange, on a Unit-by-Unit basis by reference to
the resulting Basis Adjustment to the Corporate Taxpayer. Notwithstanding the foregoing, for each Taxable Year ending on or after the date of a Change of Control that occurs after the IPO Date, all Tax Benefit Payments paid with respect to the Units
that were Exchanged after the effective time of such Change of Control shall be calculated by utilizing Valuation Assumptions (1), (2) and (4), substituting in each case the terms “date of a Change of Control” for an “Early
Termination Date.” 
 (c) An “NOL Tax Benefit Payment” in respect of an Existing Shareholder for a Taxable Year
after such Blocker TRA Party engages in a Blocker TRA Party Merger, means an amount, not less than zero, equal to the sum of the portion of the NOL Net Tax Benefit that is allocable to such Existing Shareholder and the NOL Interest Amount with
respect thereto. Subject to Section 3.3(a), the “NOL Net Tax Benefit” for a Taxable Year shall be an amount equal to the excess, if any, of 85% of the Cumulative NOL Net Realized Tax Benefit as of the end of such Taxable
Year, over the total amount of payments previously made under clause (ii) of the first sentence of Section 3.1(a) (excluding payments attributable to NOL Interest Amounts); provided, for the avoidance of doubt, that no such recipient shall
be required to return any portion of any previously made NOL Tax Benefit Payment. The “NOL Interest Amount” shall equal the interest on the NOL Net Tax Benefit calculated at the Agreed Rate from the due date (without
extensions) for filing the Corporate Taxpayer Return with respect to Taxes for such Taxable Year until the payment date under Section 3.1(a). Notwithstanding the foregoing, for each Taxable Year ending on or after the date of a Change of
Control that occurs after the IPO Date, all NOL Tax Benefit Payments paid with respect to a Blocker TRA Party Merger occurring after the effective time of such Change of Control, shall be calculated by utilizing Valuation Assumptions (1),
(2) and (4), substituting in each case the terms “closing date of a Change of Control” for an “Early Termination Date.” 

  
 13 

 Section 3.2 No Duplicative Payments. It is intended that the provisions of this
Agreement will not result in duplicative payment of any amount (including interest) required under this Agreement. The provisions of this Agreement shall be construed in the appropriate manner to ensure such intentions are realized. 

Section 3.3 Pro Rata Payments. 

(a) Notwithstanding anything in Section 3.1 to the contrary, to the extent that the aggregate Tax benefit of the Corporate Taxpayer with
respect to the Pre-Merger NOLs, the Basis Adjustments or Imputed Interest, as such terms are defined in this Agreement, is limited in a particular Taxable Year because the Corporate Taxpayer does not have sufficient taxable income, the Net Tax
Benefit or the NOL Net Tax Benefit for the Corporate Taxpayer shall be allocated among all parties eligible for a Tax Benefit Payment (in the case of the Net Tax Benefit) or NOL Tax Benefit Payment (in the case of the NOL Net Tax Benefit) under this
Agreement in proportion to the amounts of Net Tax Benefit and NOL Net Tax Benefit, respectively, that would have been allocated to each party if the Corporate Taxpayer had sufficient taxable income so that there were no such limitation. 

(b) After taking into account Section 3.3(a), if for any reason the Corporate Taxpayer does not fully satisfy its payment obligations to
make all Tax Benefit Payments and NOL Tax Benefit Payments due under this Agreement in respect of a particular Taxable Year, then the Corporate Taxpayer and the TRA Parties agree that no Tax Benefit Payment or NOL Tax Benefit Payment shall be made
in respect of any Taxable Year until all Tax Benefit Payments in respect of prior Taxable Years have been made in full. 
 ARTICLE IV

 TERMINATION 

Section 4.1 Early Termination of Agreement; Breach of Agreement. 

(a) The Corporate Taxpayer may terminate this Agreement with respect to all amounts payable to the TRA Parties and with respect to all of the
Units held by the TRA Parties at any time by paying to each TRA Party the Early Termination Payment in respect of such TRA Party; provided, however, that this Agreement shall only terminate upon the receipt of the Early Termination
Payment by all TRA Parties, and provided, further, that the Corporate Taxpayer may withdraw any notice to execute its termination rights under this Section 4.1(a) prior to the time at which any Early Termination Payment has been
paid. Upon payment of the Early Termination Payment by the Corporate Taxpayer, none of the TRA Parties or the Corporate Taxpayer shall have any further payment obligations under this Agreement, other than for any (a) Tax Benefit Payment or
NOL Tax Benefit Payment due and payable and that remains unpaid as of the Early Termination Notice and (b) Tax Benefit Payment or NOL Tax Benefit Payment due for the Taxable Year ending with or including the date of the Early Termination Notice
(except to the extent that the amount described in clause (b) is included in the Early Termination Payment). If an Exchange or Blocker TRA Party Merger occurs after the Corporate Taxpayer makes all of the required Early Termination
Payments, the Corporate Taxpayer shall have no obligations under this Agreement with respect to such Exchange or Blocker TRA Party Merger, as the case may be. 

  
 14 

 (b) In the event that the Corporate Taxpayer (1) breaches any of its material obligations
under this Agreement, whether as a result of failure to make any payment when due, failure to honor any other material obligation required hereunder or by operation of law as a result of the rejection of this Agreement in a case commenced under the
Bankruptcy Code or otherwise or (2) (A) shall commence any case, proceeding or other action (i) under any existing or future law of any jurisdiction, domestic or foreign, relating to bankruptcy, insolvency, reorganization or relief of
debtors, seeking to have an order for relief entered with respect to it, or seeking to adjudicate it a bankrupt or insolvent, or seeking reorganization, arrangement, adjustment, winding-up, liquidation, dissolution, composition or other relief with
respect to it or its debts or (ii) seeking an appointment of a receiver, trustee, custodian, conservator or other similar official for it or for all or any substantial part of its assets, or it shall make a general assignment for the benefit of
creditors or (B) there shall be commenced against Corporate Taxpayer any case, proceeding or other action of the nature referred to in clause (A) above that remains undismissed or undischarged for a period of 60 days, all obligations
hereunder shall be automatically accelerated and shall be immediately due and payable, and such obligations shall be calculated as if an Early Termination Notice had been delivered on the date of such breach and shall include, but not be limited to,
(1) the Early Termination Payments calculated as if an Early Termination Notice had been delivered on the date of a breach, (2) any Tax Benefit Payment or NOL Tax Benefit Payment due and payable and that remains unpaid as of the date of a
breach, and (3) any Tax Benefit Payment or NOL Tax Benefit Payment in respect of any TRA Party due for the Taxable Year ending with or including the date of a breach; provided that procedures similar to the procedures of Section 4.2 shall
apply with respect to the determination of the amount payable by the Corporate Taxpayer pursuant to this sentence. Notwithstanding the foregoing (other than as set forth in subsection (2) above), in the event that the Corporate Taxpayer
breaches this Agreement, each TRA Party shall be entitled to elect to receive the amounts set forth in clauses (1), (2) and (3) above or to seek specific performance of the terms hereof. The parties agree that the failure to make any
payment due pursuant to this Agreement within three months of the date such payment is due shall be deemed to be a breach of a material obligation under this Agreement for all purposes of this Agreement, and that it will not be considered to be a
breach of a material obligation under this Agreement to make a payment due pursuant to this Agreement within three months of the date such payment is due. Notwithstanding anything in this Agreement to the contrary, it shall not be a breach of this
Agreement if the Corporate Taxpayer fails to make any Tax Benefit Payment when due to the extent that the Corporate Taxpayer has insufficient funds to make such payment in the Corporate Taxpayer’s sole judgment exercised in good faith;
provided that the interest provisions of Section 5.2 shall apply to such late payment (unless the Corporate Taxpayer does not have sufficient cash to make such payment as a result of limitations imposed by existing credit agreements to
which OpCo or any its Subsidiaries is a party, in which case Section 5.2 shall apply, but the Default Rate shall be replaced by the Agreed Rate). 

(c) In the event of a Change of Control, then all obligations hereunder with respect to any Exchanges or Pre-Merger NOLs from any Blocker TRA
Party Merger occurring prior to such Change of Control shall be accelerated and such obligations shall be calculated as if an Early Termination Notice had been delivered on the date of such Change of Control and shall

  
 15 

 
include (1) the Early Termination Payments calculated with respect to such prior Exchanges or Pre-Merger NOLs as if the Early Termination Date is the date of such Change of Control,
(2) any Tax Benefit Payment or NOL Tax Benefit Payment due and payable and that remains unpaid as of the date of such Change of Control, and (3) any Tax Benefit Payment or NOL Tax Benefit Payment in respect of any TRA Party due for the
Taxable Year ending with or including the date of such Change of Control. In the event of a Change of Control, any Early Termination Payment described in the preceding sentence shall be calculated utilizing Valuation Assumptions (1), (2),
(3) and (4), substituting in each case the terms “date of a Change of Control” for an “Early Termination Date.” Any Exchanges or Pre-Merger NOLs with respect to which a payment has been made under this Section 4.1(c)
shall be excluded in calculating any future Tax Benefit Payments, NOL Tax Benefit Payments or Early Termination Payments, and this Agreement shall have no further application to such Exchanges or Pre-Merger NOLs. 

Section 4.2 Early Termination Notice. If the Corporate Taxpayer chooses to exercise its right of early termination under
Section 4.1 above, the Corporate Taxpayer shall deliver to each TRA Party notice of such intention to exercise such right (“Early Termination Notice”) and a schedule (the “Early Termination
Schedule”) specifying the Corporate Taxpayer’s intention to exercise such right and showing in reasonable detail the calculation of the Early Termination Payment(s) due for each TRA Party. Each Early Termination Schedule shall
become final and binding on all parties thirty (30) calendar days from the first date on which all TRA Parties are treated as having received such Schedule or amendment thereto under Section 7.1 unless the TRA Party Representative
(i) within thirty (30) calendar days after such date provides the Corporate Taxpayer with notice of a material objection to such Schedule made in good faith (“Material Objection Notice”) or (ii) provides a
written waiver of such right of a Material Objection Notice within the period described in clause (i) above, in which case such Schedule becomes binding on the date the waiver is received by the Corporate Taxpayer. If the Corporate Taxpayer and
the TRA Party Representative, for any reason, are unable to successfully resolve the issues raised in such notice within thirty (30) calendar days after receipt by the Corporate Taxpayer of the Material Objection Notice, the Corporate Taxpayer
and the TRA Party Representative shall employ the Reconciliation Procedures in which case such Schedule becomes binding ten (10) days after the conclusion of the Reconciliation Procedures. The TRA Party Representative will fairly represent the
interests of each of the TRA Parties and shall timely raise and pursue, in accordance with this Section 4.2, any reasonable objection to an Early Termination Schedule or amendment thereto timely communicated in writing to the TRA Party
Representative by a TRA Party. 
 Section 4.3 Payment upon Early Termination. 

(a) Within three (3) calendar days after an Early Termination Effective Date, the Corporate Taxpayer shall pay to the TRA Party an amount
equal to the Early Termination Payment in respect of such TRA Party. Such payment shall be made by wire transfer of immediately available funds to a bank account or accounts designated by the TRA Party or as otherwise agreed by the Corporate
Taxpayer and such TRA Party. 
 (b) “Early Termination Payment” in respect of a TRA Party shall equal the present
value, discounted at the Early Termination Rate as of the applicable Early Termination Effective Date, of all Tax Benefit Payments or NOL Tax Benefit Payments in respect of such 

  
 16 

 
TRA Party that would be required to be paid by the Corporate Taxpayer beginning from the Early Termination Date and assuming that the Valuation Assumptions in respect of such TRA Party are
applied. 
 ARTICLE V 

SUBORDINATION AND LATE PAYMENTS 

Section 5.1 Subordination. Notwithstanding any other provision of this Agreement to the contrary, any Tax Benefit Payment or
Early Termination Payment required to be made by the Corporate Taxpayer to the TRA Parties under this Agreement shall rank subordinate and junior in right of payment to any principal, interest or other amounts due and payable in respect of any
obligations in respect of indebtedness for borrowed money of the Corporate Taxpayer and its Subsidiaries (“Senior Obligations”) and shall rank pari passu in right of payment with all current or future unsecured
obligations of the Corporate Taxpayer that are not Senior Obligations. To the extent that any payment under this Agreement is not permitted to be made at the time payment is due as a result of this Section 5.1 and the terms of agreements
governing Senior Obligations, such payment obligation nevertheless shall accrue for the benefit of TRA Parties and the Corporate Taxpayer shall make such payments at the first opportunity that such payments are permitted to be made in accordance
with the terms of the Senior Obligations.  
 Section 5.2 Late Payments by the Corporate Taxpayer. The amount of all or
any portion of any Tax Benefit Payment, NOL Tax Benefit Payment or Early Termination Payment not made to the TRA Parties when due under the terms of this Agreement, whether as a result of Section 5.1 or otherwise, shall be payable together with
any interest thereon, computed at the Default Rate and commencing from the date on which such Tax Benefit Payment, NOL Tax Benefit Payment or Early Termination Payment was first due and payable to the date of actual payment. 

ARTICLE VI 
 NO
DISPUTES; CONSISTENCY; COOPERATION 
 Section 6.1 Participation in the Corporate Taxpayer’s and OpCo’s Tax
Matters. Except as otherwise provided herein, and except as provided in Article V of the LP Agreement, the Corporate Taxpayer shall have full responsibility for, and sole discretion over, all Tax matters concerning the Corporate Taxpayer and
OpCo, including without limitation the preparation, filing or amending of any Tax Return and defending, contesting or settling any issue pertaining to Taxes. Notwithstanding the foregoing, the Corporate Taxpayer shall notify the TRA Party
Representative of, and keep the TRA Party Representative reasonably informed with respect to, the portion of any audit of the Corporate Taxpayer and OpCo by a Taxing Authority the outcome of which is reasonably expected to materially affect the
rights and obligations of a TRA Party under this Agreement, and shall provide to the TRA Party Representative reasonable opportunity to provide information and other input to the Corporate Taxpayer, OpCo and their respective advisors concerning the
conduct of any such portion of such audit; provided, however, that the Corporate Taxpayer and OpCo shall not be required to take any action that is inconsistent with any provision of the LP Agreement. 

  
 17 

 Section 6.2 Consistency. The Corporate Taxpayer and the TRA Parties agree to
report and cause to be reported for all purposes, including federal, state and local Tax purposes and financial reporting purposes, all Tax-related items (including, without limitation, the Basis Adjustments and each Tax Benefit Payment or NOL Tax
Benefit Payment) in a manner consistent with that contemplated by this Agreement or specified by the Corporate Taxpayer in any Schedule required to be provided by or on behalf of the Corporate Taxpayer under this Agreement unless otherwise required
by law. The Corporate Taxpayer shall (and shall cause OpCo and its other Subsidiaries to) use reasonable efforts (for the avoidance of doubt, taking into account the interests and entitlements of all TRA Parties under this Agreement) to defend the
Tax treatment contemplated by this Agreement and any Schedule in any audit, contest or similar proceeding with any Taxing Authority. 

Section 6.3 Cooperation. Each of the TRA Parties shall (a) furnish to the Corporate Taxpayer in a timely manner such
information, documents and other materials as the Corporate Taxpayer may reasonably request for purposes of making any determination or computation necessary or appropriate under this Agreement, preparing any Tax Return or contesting or defending
any audit, examination or controversy with any Taxing Authority, (b) make itself available to the Corporate Taxpayer and its representatives to provide explanations of documents and materials and such other information as the Corporate Taxpayer
or its representatives may reasonably request in connection with any of the matters described in clause (a) above, and (c) reasonably cooperate in connection with any such matter, and the Corporate Taxpayer shall reimburse each such TRA
Party for any reasonable and documented out-of-pocket costs and expenses incurred pursuant to this Section. 
 ARTICLE VII 

MISCELLANEOUS 

Section 7.1 Notices. All notices, requests, claims, demands and other communications hereunder shall be in writing and
shall be deemed duly given and received (a) on the date of delivery if delivered personally, or by facsimile or email with confirmation of transmission by the transmitting equipment or (b) on the first Business Day following the date of
dispatch if delivered by a recognized next-day courier service. All notices hereunder shall be delivered as set forth below, or pursuant to such other instructions as may be designated in writing by the party to receive such notice:

If to the Corporate Taxpayer, to:

Summit Materials, Inc. 
 1550
Wynkoop Street, 3rd Floor 
 Denver, Colorado 80202 

Attention: Chief Legal Officer 

Fax: (303) 893-6993 

Email: Legal@Summit-Materials.com 

  
 18 

 with a copy to: 

Summit Materials, Inc. 
 1550
Wynkoop Street, 3rd Floor 
 Denver, Colorado 80202 

Attention: Chief Financial Officer 

Fax: (303) 893-6993 
 Email:
Brian.Harris@summit-materials.com 
 If to the TRA Parties, to the respective addresses, fax numbers and email addresses set forth in the
records of OpCo. 
 Any party may change its address, fax number or email by giving the other party written notice of its new address, fax number or email
in the manner set forth above. 
 Section 7.2 Counterparts. This Agreement may be executed in one or more counterparts, all of
which shall be considered one and the same agreement and shall become effective when one or more counterparts have been signed by each of the parties and delivered to the other parties, it being understood that all parties need not sign the same
counterpart. Delivery of an executed signature page to this Agreement by facsimile transmission shall be as effective as delivery of a manually signed counterpart of this Agreement. 

Section 7.3 Entire Agreement; No Third Party Beneficiaries. This Agreement constitutes the entire agreement and supersedes all
prior agreements and understandings, both written and oral, among the parties with respect to the subject matter hereof. This Agreement shall be binding upon and inure solely to the benefit of each party hereto and their respective successors and
permitted assigns, and nothing in this Agreement, express or implied, is intended to or shall confer upon any other Person any right, benefit or remedy of any nature whatsoever under or by reason of this Agreement. 

Section 7.4 Governing Law. This Agreement shall be governed by, and construed in accordance with, the law of the State of New
York. 
 Section 7.5 Severability. If any term or other provision of this Agreement is invalid, illegal or incapable of being
enforced by any law or public policy, all other terms and provisions of this Agreement shall nevertheless remain in full force and effect so long as the economic or legal substance of the transactions contemplated hereby is not affected in any
manner materially adverse to any party. Upon such determination that any term or other provision is invalid, illegal or incapable of being enforced, the parties hereto shall negotiate in good faith to modify this Agreement so as to effect the
original intent of the parties as closely as possible in an acceptable manner in order that the transactions contemplated hereby are consummated as originally contemplated to the greatest extent possible. 

Section 7.6 Successors; Assignment; Amendments; Waivers. 

(a) Each TRA Party may assign any of its rights under this Agreement to any Person as long as such transferee has executed and delivered, or,
in connection with such 

  
 19 

 
transfer, executes and delivers, a joinder to this Agreement, in form and substance reasonably satisfactory to the Corporate Taxpayer, agreeing to become a TRA Party for all purposes of this
Agreement, except as otherwise provided in such joinder. 
 (b) No provision of this Agreement may be amended unless such amendment is
approved in writing by each of the Corporate Taxpayer and by the TRA Parties who would be entitled to receive at least two-thirds of the total amount of the Early Termination Payments payable to all TRA Parties hereunder if the Corporate Taxpayer
had exercised its right of early termination on the date of the most recent Exchange prior to such amendment (excluding, for purposes of this sentence, all payments made to any TRA Party pursuant to this Agreement since the date of such most recent
Exchange); provided, that no such amendment shall be effective if such amendment will have a disproportionate effect on the payments one or more TRA Parties receive under this Agreement unless such amendment is consented in writing by such
TRA Parties disproportionately affected who would be entitled to receive at least two-thirds of the total amount of the Early Termination Payments payable to all TRA Parties disproportionately affected hereunder if the Corporate Taxpayer had
exercised its right of early termination on the date of the most recent Exchange prior to such amendment (excluding, for purposes of this sentence, all payments made to any TRA Party pursuant to this Agreement since the date of such most recent
Exchange). No provision of this Agreement may be waived unless such waiver is in writing and signed by the party against whom the waiver is to be effective. 

(c) All of the terms and provisions of this Agreement shall be binding upon, shall inure to the benefit of and shall be enforceable by the
parties hereto and their respective successors, assigns, heirs, executors, administrators and legal representatives. The Corporate Taxpayer shall require and cause any direct or indirect successor (whether by purchase, merger, consolidation or
otherwise) to all or substantially all of the business or assets of the Corporate Taxpayer, by written agreement, expressly to assume and agree to perform this Agreement in the same manner and to the same extent that the Corporate Taxpayer would be
required to perform if no such succession had taken place. 
 Section 7.7 Titles and Subtitles. The titles of the sections and
subsections of this Agreement are for convenience of reference only and are not to be considered in construing this Agreement. 
 Section
7.8 Resolution of Disputes. 
 (a) Any and all disputes which are not governed by Section 7.9 and cannot be settled amicably,
including any ancillary claims of any party, arising out of, relating to or in connection with the validity, negotiation, execution, interpretation, performance or non-performance of this Agreement (including the validity, scope and enforceability
of this arbitration provision) (each a “Dispute”) shall be finally settled by arbitration conducted by a single arbitrator in New York in accordance with the then-existing Rules of Arbitration of the International Chamber of
Commerce. If the parties to the Dispute fail to agree on the selection of an arbitrator within thirty (30) calendar days of the receipt of the request for arbitration, the International Chamber of Commerce shall make the appointment. The
arbitrator shall be a lawyer admitted to the practice of law in the State of New York and shall conduct the proceedings in the English language. Performance under this Agreement shall continue if reasonably possible during any arbitration
proceedings.

  
 20 

 (b) Notwithstanding the provisions of paragraph (a), the Corporate Taxpayer may bring an action
or special proceeding in any court of competent jurisdiction for the purpose of compelling a party to arbitrate, seeking temporary or preliminary relief in aid of an arbitration hereunder, and/or enforcing an arbitration award and, for the purposes
of this paragraph (b), each TRA Party (i) expressly consents to the application of paragraph (c) of this Section 7.8 to any such action or proceeding, (ii) agrees that proof shall not be required that monetary damages for breach
of the provisions of this Agreement would be difficult to calculate and that remedies at law would be inadequate, and (iii) irrevocably appoints the Corporate Taxpayer as agent of such TRA Party for service of process in connection with any
such action or proceeding and agrees that service of process upon such agent, who shall promptly advise the TRA Party of any such service of process, shall be deemed in every respect effective service of process upon the TRA Party in any such action
or proceeding. 
 (c) (i) EACH PARTY HEREBY IRREVOCABLY SUBMITS TO THE JURISDICTION OF COURTS LOCATED IN NEW YORK, NEW YORK FOR THE
PURPOSE OF ANY JUDICIAL PROCEEDING BROUGHT IN ACCORDANCE WITH THE PROVISIONS OF THIS SECTION 7.8, OR ANY JUDICIAL PROCEEDING ANCILLARY TO AN ARBITRATION OR CONTEMPLATED ARBITRATION ARISING OUT OF OR RELATING TO OR CONCERNING THIS AGREEMENT. Such
ancillary judicial proceedings include any suit, action or proceeding to compel arbitration, to obtain temporary or preliminary judicial relief in aid of arbitration, or to confirm an arbitration award. The parties acknowledge that the fora
designated by this paragraph (c) have a reasonable relation to this Agreement, and to the parties’ relationship with one another; and

(ii) The parties hereby waive, to the fullest extent permitted by applicable law, any objection which they now or hereafter may have to
personal jurisdiction or to the laying of venue of any such ancillary suit, action or proceeding brought in any court referred to in the preceding paragraph of this Section 7.8 and such parties agree not to plead or claim the same. 

Section 7.9 Reconciliation. In the event that the Corporate Taxpayer and the TRA Party Representative are unable to resolve a
disagreement with respect to the matters governed by Sections 2.3 and 4.2 within the relevant period designated in this Agreement (“Reconciliation Dispute”), the Reconciliation Dispute shall be submitted for determination to
a nationally recognized expert (the “Expert”) in the particular area of disagreement mutually acceptable to both parties. The Expert shall be a partner or principal in a nationally recognized accounting or law firm, and
unless the Corporate Taxpayer and the TRA Party Representative agree otherwise, the Expert shall not, and the firm that employs the Expert shall not, have any material relationship with the Corporate Taxpayer or the TRA Party Representative or other
actual or potential conflict of interest. If the Corporate Taxpayer and the TRA Party Representative are unable to agree on an Expert within fifteen (15) calendar days of receipt by the respondent(s) of written notice of a Reconciliation
Dispute, the Expert shall be appointed by the International Chamber of Commerce Centre for Expertise. The Expert shall resolve any matter relating to the Exchange Basis Schedule or an amendment thereto or the Early Termination Schedule or an
amendment thereto within thirty (30) calendar days and shall resolve 

  
 21 

 
any matter relating to a Tax Benefit Schedule or an amendment thereto within fifteen (15) calendar days or as soon thereafter as is reasonably practicable, in each case after the matter has
been submitted to the Expert for resolution. Notwithstanding the preceding sentence, if the matter is not resolved before any payment that is the subject of a disagreement would be due (in the absence of such disagreement) or any Tax Return
reflecting the subject of a disagreement is due, the undisputed amount shall be paid on the date prescribed by this Agreement and such Tax Return may be filed as prepared by the Corporate Taxpayer, subject to adjustment or amendment upon
resolution. The costs and expenses relating to the engagement of such Expert or amending any Tax Return shall be borne by the Corporate Taxpayer except as provided in the next sentence. The Corporate Taxpayer and the TRA Party
Representative shall bear their own costs and expenses of such proceeding, unless (i) the Expert adopts the TRA Party Representative’s position, in which case the Corporate Taxpayer shall reimburse the TRA Party Representative for any
reasonable out-of-pocket costs and expenses in such proceeding, or (ii) the Expert adopts the Corporate Taxpayer’s position, in which case the TRA Party Representative shall reimburse the Corporate Taxpayer for any reasonable out-of-pocket
costs and expenses in such proceeding. Any dispute as to whether a dispute is a Reconciliation Dispute within the meaning of this Section 7.9 shall be decided by the Expert. The Expert shall finally determine any Reconciliation
Dispute and the determinations of the Expert pursuant to this Section 7.9 shall be binding on the Corporate Taxpayer and each of the TRA Parties and may be entered and enforced in any court having jurisdiction.

Section 7.10 Withholding. The Corporate Taxpayer shall be entitled to deduct and withhold from any payment payable pursuant to
this Agreement such amounts as the Corporate Taxpayer is required to deduct and withhold with respect to the making of such payment under the Code or any provision of state, local or foreign tax law. To the extent that amounts are so withheld and
paid over to the appropriate Taxing Authority by the Corporate Taxpayer, such withheld amounts shall be treated for all purposes of this Agreement as having been paid to the Person in respect of whom such withholding was made. 

Section 7.11 Admission of the Corporate Taxpayer into a Consolidated Group; Transfers of Corporate Assets. 

(a) If the Corporate Taxpayer is or becomes a member of an affiliated or consolidated group of corporations that files a consolidated income
tax return pursuant to Sections 1501 et seq. of the Code or any corresponding provisions of state or local law, then: (i) the provisions of this Agreement shall be applied with respect to the group as a whole; and (ii) Tax Benefit
Payments, NOL Tax Benefit Payments, Early Termination Payments and other applicable items hereunder shall be computed with reference to the consolidated taxable income of the group as a whole. 

(b) If any entity that is obligated to make a Tax Benefit Payment or Early Termination Payment hereunder transfers one or more assets to a
corporation (or a Person classified as a corporation for United States federal income tax purposes) with which such entity does not file a consolidated tax return pursuant to Section 1501 of the Code or any corresponding provisions of state,
local or foreign law (including as a result of any series of transactions or acts), such entity, for purposes of calculating the amount of any Tax Benefit Payment or Early Termination Payment (e.g., calculating the gross income of the entity and
determining the 

  
 22 

 
Realized Tax Benefit of such entity) due hereunder, shall be treated as having disposed of such asset in a fully taxable transaction on the date of such contribution. The consideration
deemed to be received by such entity shall be equal to the gross fair market value of the contributed asset. For purposes of this Section 7.11, a transfer of a partnership interest shall be treated as a transfer of the transferring
partner’s share of each of the assets and liabilities of that partnership. 
 Section 7.12 Confidentiality. 

(a) Each TRA Party and each of their assignees acknowledge and agree that the information of the Corporate Taxpayer is confidential and, except
in the course of performing any duties as necessary for the Corporate Taxpayer and its Affiliates, as required by law or legal process or to enforce the terms of this Agreement, such person shall keep and retain in the strictest confidence and not
disclose to any Person any confidential matters, acquired pursuant to this Agreement, of the Corporate Taxpayer and its Affiliates and successors, concerning OpCo and its Affiliates and successors or the Members, learned by the TRA Party heretofore
or hereafter. This Section 7.12 shall not apply to (i) any information that has been made publicly available by the Corporate Taxpayer or any of its Affiliates, becomes public knowledge (except as a result of an act of the TRA Party
in violation of this Agreement) or is generally known to the business community and (ii) the disclosure of information to the extent necessary for the TRA Party to prepare and file its Tax Returns, to respond to any inquiries regarding the same
from any taxing authority or to prosecute or defend any action, proceeding or audit by any taxing authority with respect to such returns. Notwithstanding anything to the contrary herein, each TRA Party and each of their assignees (and each
employee, representative or other agent of the TRA Party or its assignees, as applicable) may disclose to any and all Persons, without limitation of any kind, the tax treatment and tax structure of the Corporate Taxpayer, OpCo and their Affiliates,
and any of their transactions, and all materials of any kind (including opinions or other tax analyses) that are provided to the TRA Party relating to such tax treatment and tax structure. 

(b) If a TRA Party or an assignee commits a breach, or threatens to commit a breach, of any of the provisions of this Section 7.12, the
Corporate Taxpayer shall have the right and remedy to have the provisions of this Section 7.12 specifically enforced by injunctive relief or otherwise by any court of competent jurisdiction without the need to post any bond or other
security, it being acknowledged and agreed that any such breach or threatened breach shall cause irreparable injury to the Corporate Taxpayer or any of its Subsidiaries or the TRA Parties and the accounts and funds managed by the Corporate Taxpayer
and that money damages alone shall not provide an adequate remedy to such Persons. Such rights and remedies shall be in addition to, and not in lieu of, any other rights and remedies available at law or in equity. 

Section 7.13 Change in Law. Notwithstanding anything herein to the contrary, if, in connection with an actual or proposed change
in law, a TRA Party reasonably believes that the existence of this Agreement could cause income (other than income arising from receipt of a payment under this Agreement) recognized by the TRA Party upon any Exchange by such TRA Party to be treated
as ordinary income rather than capital gain (or otherwise taxed at ordinary income rates) for United States federal income tax purposes or would have other material adverse tax consequences to such TRA Party, then at the election of such TRA Party
and to the extent specified by such TRA Party, this Agreement (i) shall cease to have further effect with respect to such TRA Party, (ii) shall not apply to an Exchange by such TRA Party occurring after 

  
 23 

 
a date specified by such TRA Party, or (iii) shall otherwise be amended in a manner determined by such TRA Party, provided that such amendment shall not result in an increase in payments
under this Agreement at any time as compared to the amounts and times of payments that would have been due in the absence of such amendment. 

[The remainder of this page is intentionally blank] 

  
 24 

 IN WITNESS WHEREOF, the Corporate Taxpayer and each TRA Party have duly executed this Agreement
as of the date first written above. 
  

			
	Corporate Taxpayer:
	
	SUMMIT MATERIALS, INC.
		
	By:		 /s/ Thomas W. Hill

	Name:		Thomas W. Hill
	Title:		Chief Executive Officer

  

			
	TRA Parties:		

  

			
	BLACKSTONE PARTICIPATION PARTNERSHIP
	(CAYMAN) 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 (CAYMAN) 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

 [Signature Page – Summit Materials Tax Receivable Agreement] 

 
			
	BLACKSTONE CAPITAL PARTNERS (CAYMAN) 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 (CAYMAN) 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

 [Signature Page – Summit Materials Tax Receivable Agreement] 

 
			
	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

 [Signature Page – Summit Materials Tax Receivable Agreement] 

 
			
	All other TRA Parties listed in Annex 1 attached hereto
		
	By:		 /s/ Anne Lee Benedict

	Name:		Anne Lee Benedict
	Title:		Attorney-in-Fact

 [Signature Page – Summit Materials Tax Receivable Agreement] 

 ANNEX 1 

Thomas W. Hill 
 Jane B. Hill, Trustee for The Hill Trust 

Silverhawk Summit, L.P. 
 Gardner Family Investments, LLC 

Charles Goodyear 
 Summit Materials Holding-G, L.L.C. 

Michael J. Brady 
 Robert Price 

Anthony Keenan 
 Anya Fonina Civitella 

Damian J. Murphy 
 Angela Dziubek 

R. Michael Johnson 
 Thomas A. Beck 

M. Shane Evans 
 Val Staker 

Filip Wojcikowski 
 Lane Bybee 

Douglas C. Rauh 
 Clint Pulley 

John R. Murphy 
 Margaret Harris, Trustee of the Harris Family
2014 Trust 
 Kevin A. Gill 
 Jennifer Rose 

Brienne Wode 
 Valerie Barker 

Shannon Neeley 
 Ashley Sakwa 

Anne Lee Benedict 
 Howard L. Lance 

Hinkle Family Assets Holding Company, LLC 
 RMD Investment Group,
L.L.C. 
 K Six, LLC 
 John Ramming 

Lance Townsend 
 William B. Carroll 

Grant D. Shelton 
 Dean K. Lundquist 

James D. Ramming 
 David L. Fuller 

Clyde C. Fuller 
 D’arcy Todd Barten 

Perry Glen Shepard 
 Robert K. Hall 

Mark Buster 
 Bryan Kalbfleisch 

Larry Winkleman 
 Amanda Mohr

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00242-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00242-of-00352.parquet"}]]