Karli S. Anderson - Feb 28, 2022 Form 4 Insider Report for Summit Materials, Inc. (SUM)

Role
Officer
Signature
/s/ Christopher B. Gaskill, as Attorney-in-Fact
Stock symbol
SUM
Transactions as of
Feb 28, 2022
Transactions value $
-$45,331
Form type
4
Date filed
3/1/2022, 04:58 PM
Previous filing
Sep 8, 2021
Next 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 +2.2K +31.83% 9.12K Feb 28, 2022 Direct F1
transaction SUM Class A Common Stock Options Exercise +2.37K +25.99% 11.5K Feb 28, 2022 Direct F1
transaction SUM Class A Common Stock Tax liability -$45.3K -1.45K -12.64% $31.22 10K Feb 28, 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 -2.2K -50% $0.00 2.2K Feb 28, 2022 Class A Common Stock 2.2K Direct F2, F3
transaction SUM Restricted Stock Units Options Exercise $0 -2.37K -33.33% $0.00 4.74K Feb 28, 2022 Class A Common Stock 2.37K Direct F2, F4
* 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 The Reporting Person was granted 6,603 restricted stock units that vest in three equal annual installments beginning on February 28, 2021.
F4 The Reporting Person was granted 7,107 restricted stock units that vest in three equal annual installments beginning on February 28, 2022.