X0306
4
2018-02-24
0
0001621563
Summit Materials, Inc.
SUM
0001635215
Benedict Anne Lee
C/O SUMMIT MATERIALS, INC.
1550 WYNKOOP STREET, 3RD FLOOR
DENVER
CO
80202
0
1
0
0
See Remarks
Class A Common Stock
2018-02-24
4
M
0
2646
A
6410
D
Class A Common Stock
2018-02-24
4
F
0
908
31.74
D
5502
D
Restricted Stock Units
2018-02-24
4
M
0
2646
0
D
Class A Common Stock
2646
2646
D
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.
Total holdings include shares of Class A Common Stock received pursuant to a stock dividend paid on December 22, 2017.
Each restricted stock unit represents a contingent right to receive one share of Class A Common Stock. The restricted stock units settle in either Class A Common Stock or cash (or a combination thereof) at the discretion of the Issuer's compensation committee.
On February 24, 2016, the Reporting Person was granted 7,938 restricted stock units that vest in three equal annual installments beginning on February 24, 2017.
Title: EVP, Chief Legal Officer & Secretary
/s/ Anne Lee Benedict
2018-02-27