Christopher B. Gaskill - Mar 7, 2024 Form 4 Insider Report for Summit Materials, Inc. (SUM)

Role
Title: EVP, Chief Legal Officer & Secretary
Signature
/s/ Christopher B. Gaskill
Stock symbol
SUM
Transactions as of
Mar 7, 2024
Transactions value $
-$273,755
Form type
4
Date filed
3/8/2024, 08:21 PM
Previous filing
Mar 4, 2024

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SUM Class A Common Stock Award $0 +14.8K +47.4% $0.00 45.9K Mar 7, 2024 Direct F1, F2, F3
transaction SUM Class A Common Stock Tax liability -$274K -6.46K -14.07% $42.39 39.4K Mar 7, 2024 Direct

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 +13.6K $0.00 13.6K Mar 7, 2024 Class A Common Stock 13.6K Direct F4, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Reflects shares of Class A Common Stock earned and delivered on performance units previously granted based upon the satisfaction of certain performance criteria.
F2 Total holdings include shares of Class A Common Stock received pursuant to a stock dividend paid on December 29, 2022.
F3 Total holdings include shares of Class A Common Stock acquired through the Issuer's Employee Stock Purchase Plan on April 14, 2022, October 18, 2022, May 28, 2023 and November 30, 2023.
F4 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.
F5 These restricted stock units vest in three equal annual installments beginning on February 28, 2025.

Remarks:

Title: EVP, Chief Legal Officer & Secretary