Document:

EX-4.4

 Exhibit 4.4 

EXECUTION VERSION 

SECOND SUPPLEMENTAL INDENTURE 

Second Supplemental Indenture (this “Supplemental Indenture”), dated as of October 7, 2015, among LeGrand Johnson
Construction Co., a Utah corporation (the “Guaranteeing Subsidiary”), an indirect subsidiary of Summit Materials, LLC, a Delaware limited liability company (the “Issuer”), and Wilmington Trust, National Association,
a national banking association, as trustee (the “Trustee”), Transfer Agent, Registrar and Paying Agent. 
 W I T N E S S E T
H 
 WHEREAS, the Issuer, Summit Materials Finance Corp., a Delaware corporation (together with the Issuer, the “Issuers”),
and the Guarantors have heretofore executed and delivered to the Trustee an Indenture (the “Indenture”), dated as of July 8, 2015, providing for the issuance of $350,000,000 aggregate principal amount of 6.125% Senior Notes due
2023 (the “Initial Notes”), as supplemented by that First Supplemental Indenture, dated as of July 17, 2015; 

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a
supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuers’ Obligations under the Notes and the Indenture on the terms and conditions set forth herein and under the Indenture (the
“Guarantee”); and 
 WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and
deliver this Supplemental Indenture. 
 NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the
receipt of which is hereby acknowledged, the parties mutually covenant and agree for the equal and ratable benefit of the Holders as follows: 

(1) Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture. 

(2) Agreement to Guarantee. The Guaranteeing Subsidiary acknowledges that it has received and reviewed a copy of the Indenture and all
other documents it deems necessary to review in order to enter into this Supplemental Indenture, and acknowledges and agrees to (i) join and become a party to the Indenture as indicated by its signature below; (ii) be bound by the
Indenture, as of the date hereof, as if made by, and with respect to, each signatory hereto; and (iii) perform all obligations and duties required of a Guarantor pursuant to the Indenture. The Guaranteeing Subsidiary hereby agrees to provide an
unconditional Guarantee on the terms and subject to the conditions set forth in the Indenture, including, but not limited to, Article 10 thereof. 

(3) Execution and Delivery. The Guaranteeing Subsidiary agrees that the Guarantee shall remain in full force and effect notwithstanding
the absence of the endorsement of any notation of such Guarantee on the Notes. 
 (4) No Recourse Against Others. No past, present or
future director, officer, employee, incorporator, member, partner or stockholder of the Issuers or any Guaranteeing Subsidiary shall have any liability for any obligations of the Issuers or the Guarantors (including the Guaranteeing Subsidiary)
under the Notes, any Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder by accepting Notes waives and releases all such liability. The
waiver and release are part of the consideration for issuance of the Notes. 

 (5) Governing Law. THIS SUPPLEMENTAL INDENTURE, AND ANY CLAIM, CONTROVERSY OR DISPUTE
ARISING UNDER OR RELATED TO THIS SUPPLEMENTAL INDENTURE, WILL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 

(6) Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but
all of them together represent the same agreement. This Supplemental Indenture may be executed in multiple counterparts which, when taken together, shall constitute one instrument. The exchange of copies of this Supplemental Indenture and of
signature pages by facsimile or PDF transmissions shall constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto and may be used in lieu of the original Supplemental Indenture for all purposes. Signatures
of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes. 
 (7) Effect of
Headings. The Section headings herein are for convenience only and shall not affect the construction hereof. 
 (8) The Trustee.
The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the
Guaranteeing Subsidiary. 
 (9) Benefits Acknowledged. The Guaranteeing Subsidiary’s Guarantee is subject to the terms and
conditions set forth in the Indenture. The Guaranteeing Subsidiary acknowledges that it will receive direct and indirect benefits from the financing arrangements contemplated by the Indenture and this Supplemental Indenture and that the guarantee
and waivers made by it pursuant to this Guarantee are knowingly made in contemplation of such benefits. 
 (10) Successors. All
agreements of the Guaranteeing Subsidiary in this Supplemental Indenture shall bind its Successors, except as otherwise provided in this Supplemental Indenture. All agreements of the Trustee in this Supplemental Indenture shall bind its successors.

 [Signatures on following page] 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly
executed, all as of the date first above written. 
  

					
	LEGRAND JOHNSON CONSTRUCTION CO.
		
	By:	 	 /s/ Anne Lee Benedict

		 	Name:	 	Anne Lee Benedict
		 	Title:	 	Secretary

  
 [Signature Page to
Second Supplemental Indenture] 

 
					
	 WILMINGTON TRUST, NATIONAL ASSOCIATION, as Trustee

		
	By:	 	 /s/ Joseph O’Donnell

		 	Name:	 	Joseph O’Donnell
		 	Title:	 	Vice President

  
 [Signature Page to
Second Supplemental Indenture]Exhibit 4.18

 

 

[Form of Preferred Stock Certificate]

 

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE CORPORATION OR THE TRANSFER AGENT, AND ANY
CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE
OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO., OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC),
ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO. HAS AN INTEREST HEREIN. TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT
IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE.

 

THE CORPORATION IS AUTHORIZED TO ISSUE MORE THAN ONE CLASS OF
STOCK AND MORE THAN ONE SERIES OF ITS CLASS OF PREFERRED STOCK. THE CORPORATION WILL FURNISH WITHOUT CHARGE TO EACH STOCKHOLDER
WHO SO REQUESTS THE POWERS, DESIGNATIONS, PREFERENCES AND RELATIVE PARTICIPATING, OPTIONAL OR OTHER SPECIAL RIGHTS OF EACH CLASS
OF STOCK OR SERIES THEREOF AND THE QUALIFICATIONS, LIMITATIONS OR RESTRICTIONS OF SUCH PREFERENCES AND/OR RIGHTS.

 

 

    1 

     

    

Incorporated under the laws of the State
of Delaware, March 29, 1996

 

Certificate Number: [     ]

Initial Number of Shares of Series A-1 Convertible Preferred
Stock: [              ]

 

 

	 	CUSIP [            ]
	 	ISIN [                  ]
	 	 

 

CERES, INC.

 

Ceres, Inc. (the “Corporation”)
hereby certifies that [Cede & Co.] (the “Holder”) is the registered owner of the number shown on Schedule
I hereof of fully paid and non-assessable shares of the Corporation’s designated Series A-1 Convertible Preferred Stock,
par value $0.01 per share (the “A-1 Preferred Stock”), transferable on the books and records of the Transfer
Agent, in person or by a duly authorized attorney, upon surrender of this certificate duly endorsed or assigned and in proper form
for transfer.

 

This Certificate and the shares represented
hereby are issued and shall be held subject to all the provisions of the Amended and Restated Certificate of Incorporation and
the Amended and Restated Bylaws of the Corporation and any amendments thereto, including the provisions of the Certificate of Designation
of Preferences, Rights and Limitations, dated [             ],
as the same may be amended from time to time (the “Certificate of Designations”). Capitalized terms used herein
but not defined shall have the meaning given them in the Certificate of Designations.

 

The shares of the A-1 Preferred Stock shall
be convertible in the manner and accordance with the terms set forth in the Certificate of Designations.

 

Reference is hereby made to the provisions
of the A-1 Preferred Stock set forth in the Certificate of Designations, which provisions shall for all purposes have the same
effect as if set forth at this place.

 

Upon receipt of this executed certificate,
the Holder is bound by the Certificate of Designations and is entitled to the benefits thereunder.

 

[Unless the Transfer Agent has properly
countersigned, these shares of the A-1 Preferred Stock shall not be entitled to any benefit under the Certificate of Designations
or be valid or obligatory for any purpose.]

 

 

 

 

    2 

     

    

IN WITNESS WHEREOF the said Corporation
has caused this Certificate to be signed by its duly authorized officers as of [                        ].

 

 

	 	 
	 	By: 	  
	 	 Name:
Title:
	 	 	 

 

 

	 	 
	 	By: 	  
	 	 Name:
Title:
	 	 	 

 

 

 

 

    3 

     

    

[COUNTERSIGNATURE

 

These are shares of the Series A-1 Convertible
Preferred Stock referred to in the within-mentioned Certificate of Designations.

 

Dated: ____________________

 

American Stock Transfer & Trust Company, LLC, as Transfer
Agent

 

 

	 	 
	 	By: 	   ____________________________________________________
	 	 Name:
Title:]
	 	 	 

 

 

    4 

     

    

NOTICE OF CONVERSION

 

(To
be Executed by the Registered Holder in order to Convert Shares of Preferred Stock)

 

The undersigned hereby elects to convert
the number of shares of Series A-1 Convertible Preferred Stock indicated below into shares of common stock, par value $0.01 per
share (the “Common Stock”), of Ceres, Inc., a Delaware corporation (the “Corporation”), according
to the conditions hereof, as of the date written below. If shares of Common Stock are to be issued in the name of a Person other
than the undersigned, the undersigned will pay all transfer taxes payable with respect thereto. No fee will be charged to the Holders
for any conversion, except for any such transfer taxes.

 

Conversion calculations:

 

	
        Date to Effect Conversion: 

         

	
        Number of shares of Preferred Stock owned
        prior to Conversion: ________________________________________________________

         

	
        Number of shares of Preferred Stock to
        be Converted: ________________________________________________________________

         

	
        Stated Value of shares of Preferred Stock
        to be Converted:  ____________________________________________________________

         

	
        Number of shares of Common Stock to be
        Issued:  ___________________________________________________________________

         

	
        Applicable Conversion Price: __________________________________________________________________________________

         

	
        Number of shares of Preferred Stock subsequent
        to Conversion:________________________________________________________

         

	
        (If Preferred Stock is not in book-entry
        form) Address for Delivery: ______________________

        or

        (If Preferred Stock is in book-entry form)
        DWAC Instructions:

        Broker no: _________

        Account no: ___________

	 
	 	
         

        [HOLDER]

         

        By:___________________________________

        Name:

        Title:

	 	 

 

    5 

     

    

ASSIGNMENT FORM

 

To assign the shares of Series A-1 Convertible
Preferred Stock evidenced hereby, fill in the form below:

 

I, or we, assign and transfer the shares
of Series A-1 Convertible Preferred Stock evidenced hereby to:

 

 

 

(Print or type assignee’s name, address
and zip code)

 

 

(Insert assignee’s social security
or tax I.D. No.)

 

 

and irrevocably appoint ________________ as agent to transfer
the shares of A-1 Preferred Stock evidenced hereby on the books of the Transfer Agent. The agent may substitute another to act
for him or her.

 

                                                                                                                            

 

	Date: _____________________	 Your Signature: 	 __________________________________________
	 	 	(Sign exactly as your name appears on the face of this Certificate)

 

 

	 Signature Guarantee:	 
	 	 (Signature must be guaranteed)

  

(Signature must be guaranteed by an "eligible guarantor
institution" that is a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Transfer
Agent, which requirements include membership or participation in the Securities Transfer Agents Medallion Program (“STAMP”)
or such other “signature guarantee program” as may be determined by the Transfer Agent in addition to, or in substitution
for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.)

 

    6 

     

    

Schedule I

 

Ceres, Inc.

 

Global Preferred Share

Series A-1 Convertible Preferred Stock

 

 

Certificate Number: [     ]

 

The number of shares of the Series A-1 Convertible Preferred
Stock initially represented by this Global Preferred Share shall be [               ].
Thereafter the Transfer Agent shall note changes in the number of shares of the Series A-1 Convertible Preferred Stock evidenced
by this Global Preferred Share in the table set forth below: 

 

 

	Amount of Decrease in

                                                                                Number of Shares

                                                                                Represented by this

                                                                                Global Preferred Share
	Amount of Increase in

                                                                                Number of Shares

                                                                                Represented by this

                                                                                Global Preferred Share
	Number of Shares

                                                                                Represented by this

                                                                                Global Preferred Share

                                                                                following Decrease or

                                                                                Increase
	Signature of Authorized Officer

                                                                       of Transfer
Agent

	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 
	 	 	 	 

 

 

 

 

    7

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