Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
BARCLAYS PLC
  2. Issuer Name and Ticker or Trading Symbol
Summit Materials, Inc. [SUM]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
1 CHURCHILL PLACE, CANARY WHARF
3. Date of Earliest Transaction (Month/Day/Year)
07/19/2016
(Street)

LONDON, X0 E14 5HP
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Class A Common Stock 07/19/2016   P   86 A $ 21.81 13,958,332 (1) I by Barclays Capital Inc.
Class A Common Stock 07/19/2016   P   100 A $ 21.85 13,958,332 (1) I by Barclays Capital Derivatives Funding LLC
Class A Common Stock 07/19/2016   P   100 A $ 21.86 13,958,332 (1) I by Barclays Capital Derivatives Funding LLC
Class A Common Stock 07/19/2016   P   116 A $ 21.8399 13,958,332 (1) I by Barclays Capital Derivatives Funding LLC

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
BARCLAYS PLC
1 CHURCHILL PLACE
CANARY WHARF
LONDON, X0 E14 5HP
    X    

Signatures

 /s/ James Gibson, Head of Large Holdings Compliance   07/25/2016
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) As of July 19, 2016 the Reporting Persons beneficially owned 13,958,332 shares of common stock of Summit Materials, Inc. The amount set forth in column 5 represents the Reporting Persons' beneficial ownership of the common stock of the Issuer as of the close of business on July 19, 2016; ownership information after each reported transaction is not reasonably available to the Reporting Persons.
 
Remarks:
(a) Name of Person Filing:

    (1) Barclays PLC
    (2) Barclays Capital Inc. (controlled by   Barclays PLC)
    (3) Barclays Capital Derivative Funding (controlled by Barclays Bank PLC)

(b) Address of Principal Business Office or, if none, Residence:

    (1) Barclays PLC
        1 Churchill Place,
        London, E14 5HP, England

    (2) Barclays Capital Inc
        745 Seventh Avenue
        New York, New York 10019
        United States

    (3) Barclays Capital Derivative Funding LLC
        c/o Corporation Trust Company, Corporation  Trust Center
        1209 Orange Street
        Wilmington, DE 19801

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