<SEC-DOCUMENT>0000807985-18-000024-index.html : 20181113
<SEC-HEADER>0000807985-18-000024.hdr.sgml : 20181113
<ACCEPTANCE-DATETIME>20181113120811
ACCESSION NUMBER:		0000807985-18-000024
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20181113
DATE AS OF CHANGE:		20181113

SUBJECT COMPANY:	

	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:			1227

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-88815
		FILM NUMBER:		181176535

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SOUTHEASTERN ASSET MANAGEMENT INC/TN/
		CENTRAL INDEX KEY:			0000807985
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				620951781
		STATE OF INCORPORATION:			TN
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		6410 POPLAR AVENUE STE 900
		CITY:			MEMPHIS
		STATE:			TN
		ZIP:			38119
		BUSINESS PHONE:		9017612474

	MAIL ADDRESS:	
		STREET 1:		6410 POPLAR AVENUE
		STREET 2:		SUITE 900
		CITY:			MEMPHIS
		STATE:			TN
		ZIP:			38119

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PROFESSIONAL PORTFOLIO MANAGEMENT INC
		DATE OF NAME CHANGE:	19890314

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SOUTHEASTERN ASSET MANAGEMENT INC
		DATE OF NAME CHANGE:	19880622
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>sum13g.txt
<DESCRIPTION>SUMMIT MATERIALS, INC. - INITIAL FILING
<TEXT>
Document 1 - file: sum13g.txt

</DOCUMENT>
</SEC-DOCUMENT>