Deon MacMillan - Mar 10, 2022 Form 4 Insider Report for Summit Materials, Inc. (SUM)

Role
EVP, Chief People Officer and Head of Corporate Communications
Signature
/s/ Christopher B. Gaskill, as Attorney-in-Fact
Stock symbol
SUM
Transactions as of
Mar 10, 2022
Transactions value $
-$59,529
Form type
4
Date filed
3/11/2022, 03:20 PM
Previous filing
Mar 3, 2022

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SUM Class A Common Stock Options Exercise +6.54K +176.29% 10.3K Mar 10, 2022 Direct F1
transaction SUM Class A Common Stock Tax liability -$59.5K -2K -19.54% $29.72 8.25K Mar 10, 2022 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 -6.54K -58.33% $0.00 4.67K Mar 10, 2022 Class A Common Stock 6.54K Direct F2, F3
* 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 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.
F3 On March 10, 2021, the Reporting Person was granted 16,822 restricted stock units, 5,607 vested on March 10, 2021, 6,542 vested on March 10, 2022 and 4,673 vest on March 10, 2023.

Remarks:

EVP, Chief People Officer and Head of Corporate Communications