Christopher Burke Gaskill - 28 Feb 2022 Form 4 Insider Report for Summit Materials, Inc.

Role
Officer
Signature
/s/ Christopher B. Gaskill
Issuer symbol
N/A
Transactions as of
28 Feb 2022
Net transactions value
-$75,771
Form type
4
Filing time
01 Mar 2022, 17:00:38 UTC
Previous filing
29 Dec 2021
Next filing
03 Mar 2022
SEC
View on sec.gov

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SUM Class A Common Stock Options Exercise +2,236 +12% 20,674 28 Feb 2022 Direct F1
transaction SUM Class A Common Stock Options Exercise +2,692 +13% 23,366 28 Feb 2022 Direct F1
transaction SUM Class A Common Stock Options Exercise +3,062 +13% 26,428 28 Feb 2022 Direct F1
transaction SUM Class A Common Stock Tax liability $75,771 -2,427 -9.2% $31.22 24,001 28 Feb 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 -2,236 -100% $0.000000* 0 28 Feb 2022 Class A Common Stock 2,236 Direct F2, F3
transaction SUM Restricted Stock Units Options Exercise $0 -2,692 -50% $0.000000 2,692 28 Feb 2022 Class A Common Stock 2,692 Direct F2, F4
transaction SUM Restricted Stock Units Options Exercise $0 -3,062 -33% $0.000000 6,123 28 Feb 2022 Class A Common Stock 3,062 Direct F2, F5
* 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 6,710 restricted stock units that vest in three equal annual installments beginning on February 28, 2020.
F4 The Reporting Person was granted 8,077 restricted stock units that vest in three equal annual installments beginning on February 28, 2021.
F5 The Reporting Person was granted 9,185 restricted stock units that vest in three equal annual installments beginning on February 28, 2022.