Charles DePriest - Mar 7, 2024 Form 4 Insider Report for Summit Materials, Inc. (SUM)

Role: Title: EVP, East Segment Construction Materials
Signature: /s/ David Hamm, as Attorney-in-Fact
Stock symbol: SUM
Transactions as of: Mar 7, 2024
Transactions value $: $0
Form type: 4
Date filed: 3/8/2024, 08:22 PM
Previous filing: Mar 4, 2024

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	+11.1K		$0.00	11.1K	Mar 7, 2024	Class A Common Stock	11.1K		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. 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: EVP, East Segment Construction Materials