<SEC-DOCUMENT>0000932471-17-001036-index.html : 20170210
<SEC-HEADER>0000932471-17-001036.hdr.sgml : 20170210
<ACCEPTANCE-DATETIME>20170209193535
ACCESSION NUMBER:		0000932471-17-001036
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20170210
DATE AS OF CHANGE:		20170209

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/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-88815
		FILM NUMBER:		17589127

	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:			VANGUARD GROUP INC
		CENTRAL INDEX KEY:			0000102909
		IRS NUMBER:				231945930
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 2600
		STREET 2:		V26
		CITY:			VALLEY FORGE
		STATE:			PA
		ZIP:			19482-2600
		BUSINESS PHONE:		6106691000

	MAIL ADDRESS:	
		STREET 1:		PO BOX 2600
		STREET 2:		V26
		CITY:			VALLEY FORGE
		STATE:			PA
		ZIP:			19482-2600
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>summitmaterialsinc.htm
<TEXT>
Document 1 - file: summitmaterialsinc.htm

</DOCUMENT>
</SEC-DOCUMENT>