Item 5.07 Submission of Matters to a Vote of Security Holders.

On May 18, 2021, Summit Materials, Inc. (the "Company") held its 2022 annual meeting of stockholders. At the annual meeting, stockholders voted on the matters disclosed in the Company's definitive Proxy Statement on Schedule 14A filed with the Securities and Exchange Commission on April 1, 2022 (the "Proxy Statement"). The final voting results for the matters submitted to a vote of stockholders were as follows:

Proposal No. 1 - Election of Directors



At the the annual meeting, the Company's stockholders elected the persons listed
below as Class I directors for a one-year term expiring at the Company's 2023
annual meeting of stockholders or until their respective successors are duly
elected and qualified:

                          Votes For    Votes Withheld     Broker Non-Votes
Joseph S. Cantie         110,995,268       217,349           3,463,347
Anne M. Cooney           110,360,982       851,635           3,463,347
Anne P. Noonan           110,988,167       224,450           3,463,347
Tamla Oates-Forney       110,991,697       220,920           3,463,347

Proposal No. 2 - Non-Binding Vote on Executive Compensation

The Company's stockholders approved, in a non-binding advisory vote, the compensation paid to the Company's named executed officers as disclosed in the Proxy Statement.



  Votes For     Votes Against    Votes Abstained    Broker Non-Votes
 109,878,200      1,298,723          35,694            3,463,347

Proposal No. 3 - Non-Binding Vote on the Frequency of Future Advisory Votes on Executive Compensation

The Company's stockholders voted, in a non-binding advisory vote, on whether a stockholder vote to approve the compensation paid to the Company's named executed officers should occur every one, two or three years as set forth below.



    1 Year       2 Years     3 Years    Votes Abstained    Broker Non-Votes
 105,776,621     42,058     5,216,230       177,708           3,463,347

Proposal No. 4 - Ratification of Independent Registered Public Accounting Firm

The Company's stockholders ratified the appointment of KPMG LLP as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2022.

Votes For Votes Against Votes Abstained Broker Non-Votes


 114,342,160       320,786           13,018               N/A

Item 9.01 Financial Statements and Exhibits.



  (d)  Exhibits

     Exhibit No.                                           Description

                            Cover Page Interactive Data File (embedded within the Inline XBRL
104.1                       document)

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