Marshall D. Moore - 02 Feb 2024 Form 4 Insider Report for Summit Materials, Inc.

Role: Title: Executive Vice President, Chief Operations Officer
Signature: /s/ David Hamm, as Attorney-in-Fact
Issuer symbol: N/A
Transactions as of: 02 Feb 2024
Net transactions value: $0
Form type: 4
Filing time: 05 Feb 2024, 16:21:58 UTC
Previous filing: 19 Jan 2024
Next filing: 08 Mar 2024
SEC: View on sec.gov

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	SUM	Restricted Stock Units	Award	$0	+5,499		$0.000000	5,499	02 Feb 2024	Class A Common Stock	5,499		Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A Common Stock"). The restricted stock units will be settled in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's Human Capital and Compensation Committee.
F2	These restricted stock units vest in three equal annual installments beginning on February 28, 2025.

Remarks:

Title: Executive Vice President, Chief Operations Officer