<SEC-DOCUMENT>0001140361-16-085737-index.html : 20161110
<SEC-HEADER>0001140361-16-085737.hdr.sgml : 20161110
<ACCEPTANCE-DATETIME>20161110122251
ACCESSION NUMBER:		0001140361-16-085737
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20161110
DATE AS OF CHANGE:		20161110
GROUP MEMBERS:		BARON CAPITAL GROUP, INC.
GROUP MEMBERS:		BARON CAPITAL MANAGEMENT, INC.
GROUP MEMBERS:		RONALD BARON

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:		161986927

	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:			BAMCO INC /NY/
		CENTRAL INDEX KEY:			0001017918
		IRS NUMBER:				133390015
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			0228

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		767 FIFTH AVENUE
		STREET 2:		49TH FL
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10153
		BUSINESS PHONE:		2125832000

	MAIL ADDRESS:	
		STREET 1:		767 FIFTH AVENUE
		STREET 2:		49TH FL
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10153
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>doc1.htm
<DESCRIPTION>NONE
<TEXT>
Document 1 - file: doc1.htm

</DOCUMENT>
</SEC-DOCUMENT>