0001628280-23-040964.txt : 20231206 0001628280-23-040964.hdr.sgml : 20231206 20231206191419 ACCESSION NUMBER: 0001628280-23-040964 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20231206 FILED AS OF DATE: 20231206 DATE AS OF CHANGE: 20231206 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Gaskill Christopher Burke CENTRAL INDEX KEY: 0001854269 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36873 FILM NUMBER: 231470809 MAIL ADDRESS: STREET 1: C/O SUMMIT MATERIALS, INC. STREET 2: 1550 WYNKOOP STREET, 3RD FLOOR CITY: DENVER STATE: CO ZIP: 08202 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: 1231 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 wk-form4_1701908049.xml FORM 4 X0508 4 2023-12-06 0 0001621563 Summit Materials, Inc. SUM 0001854269 Gaskill Christopher Burke C/O SUMMIT MATERIALS, INC., 1801 CALIFORNIA STREET, SUITE 3500 DENVER CO 80202 0 1 0 0 See Remarks 0 Class A Common Stock 2023-12-06 4 G 0 154 0 D 26452 D Class A Common Stock 2023-12-06 4 G 0 28 0 D 26424 D Class A Common Stock 2023-12-06 4 G 0 14 0 D 26410 D Class A Common Stock 2023-12-06 4 G 0 28 0 D 26382 D Total holdings include shares of Class A Common Stock received pursuant to a stock dividend paid on December 29, 2022. Total holdings include shares of Class A Common Stock acquired through the Issuer's Employee Stock Purchase Plan on April 14, 2022, October 18, 2022, May 28, 2023 and November 20, 2023. Title: Executive Vice President, Chief Legal Officer and Secretary /s/ Christopher B. Gaskill 2023-12-06