David Loomes - Dec 20, 2024 Form 4 Insider Report for Summit Materials, Inc. (SUM)

Role
Title: EVP, Cement
Signature
/s/ Christopher B. Gaskill, as Attorney-in-Fact
Stock symbol
SUM
Transactions as of
Dec 20, 2024
Transactions value $
-$477,326
Form type
4
Date filed
12/26/2024, 04:15 PM
Previous 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 +2.25K +12.52% 20.2K Dec 20, 2024 Direct F1, F2, F3
transaction SUM Class A Common Stock Options Exercise +5.18K +25.6% 25.4K Dec 20, 2024 Direct F1
transaction SUM Class A Common Stock Options Exercise +14K +55.02% 39.4K Dec 20, 2024 Direct F1
transaction SUM Class A Common Stock Tax liability -$477K -9.45K -24.01% $50.50 29.9K Dec 20, 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 -2.25K -100% $0.00 0 Dec 20, 2024 Class A Common Stock 2.25K Direct F4, F5, F6
transaction SUM Restricted Stock Units Options Exercise $0 -5.18K -100% $0.00 0 Dec 20, 2024 Class A Common Stock 5.18K Direct F4, F5, F7
transaction SUM Restricted Stock Units Options Exercise $0 -14K -100% $0.00 0 Dec 20, 2024 Class A Common Stock 14K Direct F4, F5, F8
* 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 October 18, 2022, May 28, 2023, November 30, 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 on February 28, 2025.
F7 These restricted stock units would otherwise vest in two equal annual installments on each of February 28, 2025 and February 28, 2026.
F8 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.

Remarks:

Title: EVP, Cement