Entity Information

#	#

Economic entity name	Summit Materials, Inc.
CIK	0001621563
Accession number	0001558370-17-001167
Generator	Merrill
SEC filing page	http://www.sec.gov/Archives/edgar/data/1621563/000155837017001167/0001558370-17-001167-index.htm
XBRL Instance	http://www.sec.gov/Archives/edgar/data/1621563/000155837017001167/sum-20161231.xml
XBRL Cloud Viewer	https://edgardashboard.xbrlcloud.com/flex/viewer/XBRLViewer.html#instance=http://www.sec.gov/Archives/edgar/data/1621563/000155837017001167/sum-20161231.xml