Anne P. Noonan - 20 Dec 2024 Form 4 Insider Report for Summit Materials, Inc.

Signature
/s/ Christopher B. Gaskill, as Attorney-in-Fact
Issuer symbol
N/A
Transactions as of
20 Dec 2024
Net transactions value
-$2,747,503
Form type
4
Filing time
26 Dec 2024, 16:17:51 UTC
Previous filing
22 Apr 2024
Next filing
17 Jan 2025

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SUM Class A Common Stock Options Exercise +36,242 +14% 296,463 20 Dec 2024 Direct F1, F2, F3
transaction SUM Class A Common Stock Options Exercise +71,479 +24% 367,942 20 Dec 2024 Direct F1
transaction SUM Class A Common Stock Options Exercise +16,632 +4.5% 384,574 20 Dec 2024 Direct F1
transaction SUM Class A Common Stock Tax liability $2,747,503 -54,406 -14% $50.50 330,168 20 Dec 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 -36,242 -100% $0.000000 0 20 Dec 2024 Class A Common Stock 36,242 Direct F4, F5, F6
transaction SUM Restricted Stock Units Options Exercise $0 -71,479 -100% $0.000000 0 20 Dec 2024 Class A Common Stock 71,479 Direct F4, F5, F7
transaction SUM Restricted Stock Units Options Exercise $0 -16,632 -100% $0.000000 0 20 Dec 2024 Class A Common Stock 16,632 Direct F5, F8, F9
* 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, May 28, 2023 and May 31, 2024.
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 Reflects the accelerated vesting of restricted stock units for the purpose of reducing or eliminating the excise tax imposed under Sections 280G and 4999 of the Internal Revenue Code of 1986, as amended, that would be imposed on amounts payable to the Reporting Person in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of November 24, 2024, by and among the Issuer, Quikrete Holdings, Inc. (Purchaser), and Soar Subsidiary, Inc., a wholly owned subsidiary of Purchaser.
F6 These restricted stock units would otherwise vest in two equal annual installments on each of February 28, 2025 and February 28, 2026.
F7 These restricted stock units would otherwise vest in three equal annual installments on each of February 28, 2025, February 28, 2026 and February 28, 2027.
F8 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.
F9 These restricted stock units would otherwise vest on February 28, 2025.