0001104659-21-045797.txt : 20210401 0001104659-21-045797.hdr.sgml : 20210401 20210401212901 ACCESSION NUMBER: 0001104659-21-045797 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210330 FILED AS OF DATE: 20210401 DATE AS OF CHANGE: 20210401 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Ellerbusch Susan A CENTRAL INDEX KEY: 0001744472 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36873 FILM NUMBER: 21800387 MAIL ADDRESS: STREET 1: C/O SUMMIT MATERIALS, INC. STREET 2: 1550 WYNKOOP STREET, 3RD FLOOR CITY: DENVER STATE: CO ZIP: 80202 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Summit Materials, Inc. CENTRAL INDEX KEY: 0001621563 STANDARD INDUSTRIAL CLASSIFICATION: MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS) [1400] IRS NUMBER: 471984212 STATE OF INCORPORATION: DE FISCAL YEAR END: 1228 BUSINESS ADDRESS: STREET 1: 1550 WYNKOOP STREET, 3RD FLOOR CITY: DENVER STATE: CO ZIP: 80202 BUSINESS PHONE: 303-893-0012 MAIL ADDRESS: STREET 1: 1550 WYNKOOP STREET, 3RD FLOOR CITY: DENVER STATE: CO ZIP: 80202 4 1 tm2111872-12_4seq1.xml OWNERSHIP DOCUMENT X0306 4 2021-03-30 0 0001621563 Summit Materials, Inc. SUM 0001744472 Ellerbusch Susan A C/O SUMMIT MATERIALS, INC. 1550 WYNKOOP STREET, 3RD FLOOR DENVER CO 80202 1 0 0 0 Restricted Stock Units 2021-03-30 4 A 0 4374 0 A Class A Common Stock 4374 4374 D Each restricted stock unit represents a contingent right to receive one share of Class A common stock of the Issuer ("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 compensation committee. These restricted stock units vest on February 28, 2022. /s/ Christopher B. Gaskill, as Attorney-in-Fact 2021-04-01