Brian D. Frantz - Feb 29, 2024 Form 4 Insider Report for Summit Materials, Inc. (SUM)

Role
Title: SVP, Chief Accounting Officer and Treasurer
Signature
/s/ David Hamm, as Attorney-in-Fact
Stock symbol
SUM
Transactions as of
Feb 29, 2024
Transactions value $
-$62,442
Form type
4
Date filed
3/4/2024, 06:20 PM
Previous filing
Jan 19, 2024
Next filing
Mar 8, 2024

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SUM Class A Common Stock Options Exercise +1.97K +28.14% 8.97K Feb 29, 2024 Direct F1, F2
transaction SUM Class A Common Stock Options Exercise +1.29K +14.33% 10.3K Feb 29, 2024 Direct F1
transaction SUM Class A Common Stock Options Exercise +1.37K +13.4% 11.6K Feb 29, 2024 Direct F1
transaction SUM Class A Common Stock Tax liability -$62.4K -1.46K -12.58% $42.71 10.2K Feb 29, 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 Options Exercise $0 -1.97K -100% $0.00* 0 Feb 29, 2024 Class A Common Stock 1.97K Direct F3, F4
transaction SUM Restricted Stock Units Options Exercise $0 -1.29K -50% $0.00 1.29K Feb 29, 2024 Class A Common Stock 1.29K Direct F3, F5
transaction SUM Restricted Stock Units Options Exercise $0 -1.37K -33.35% $0.00 2.74K Feb 29, 2024 Class A Common Stock 1.37K Direct F3, F6
* 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 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.
F4 These restricted stock units vested on February 29, 2024.
F5 The Reporting Person was granted 3,855 restricted stock units that vest in three equal annual installments beginning on February 28, 2023.
F6 The Reporting Person was granted 4,117 restricted stock units that vest in three equal annual installments beginning on February 29, 2024.

Remarks:

Title: SVP, Chief Accounting Officer and Treasurer