Anne P. Noonan - Jul 20, 2023 Form 4 Insider Report for Summit Materials, Inc. (SUM)

Role
President & CEO, Director
Signature
/s/ Christopher B. Gaskill, as Attorney-in-Fact
Stock symbol
SUM
Transactions as of
Jul 20, 2023
Transactions value $
-$343,593
Form type
4
Date filed
7/21/2023, 04:23 PM
Previous filing
May 5, 2023
Next 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 Options Exercise +21.3K +12.68% 189K Jul 20, 2023 Direct F1, F2, F3
transaction SUM Class A Common Stock Tax liability -$344K -9.31K -4.92% $36.89 180K Jul 20, 2023 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 Options Exercise $0 -21.3K -100% $0.00* 0 Jul 20, 2023 Class A Common Stock 21.3K Direct F4, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Reflects restricted stock units that upon vesting converted into shares of Class A common stock of the Issuer ("Class A Common Stock") on a one-for-one basis.
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.
F4 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 compensation committee.
F5 These restricted stock units vest in three equal annual installments beginning on July 20, 2021.