TIAA CREF Investment Management’s Summit Materials, Inc. Class A Common Stock SUM Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2019 Q1	$4.52M	Sell	289,677 -4,688	-2%	-$73.3K	﹤0.01%	1520
2018 Q4	$3.59M	Sell	294,365 -5,770	-2%	-$79.8K	﹤0.01%	1579
2018 Q3	$5.37M	Sell	300,135 -365,446	-55%	-$7.95M	﹤0.01%	1520
2018 Q2	$17.2M	Sell	665,581 -28,823	-4%	-$803K	0.01%	821
2018 Q1	$20.7M	Buy	694,404 +22,136	+3%	+$683K	0.01%	750
2017 Q4	$20.8M	Buy	672,268 +130,888	+24%	+$3.94M	0.01%	774
2017 Q3	$16.8M	Buy	541,380 +165,170	+44%	+$4.69M	0.01%	847
2017 Q2	$10.5M	Buy	376,210 +16,310	+5%	+$425K	0.01%	1099
2017 Q1	$8.62M	Buy	359,900 +131,212	+57%	+$3.08M	0.01%	1219
2016 Q4	$5.28M	Buy	228,688 +6,943	+3%	+$146K	﹤0.01%	1559
2016 Q3	$3.94K	Buy	221,745 +28,429	+15%	+$550K	﹤0.01%	1765
2016 Q2	$3.79M	Buy	193,316 +96,971	+101%	+$1.94M	﹤0.01%	1739
2016 Q1	$1.8M	Sell	96,345 -16,962	-15%	-$277K	﹤0.01%	2134
2015 Q4	$2.18M	Buy	113,307 +9,160	+9%	+$187K	﹤0.01%	2086
2015 Q3	$1.84M	Buy	104,147 +14,046	+16%	+$323K	﹤0.01%	2192
2015 Q2	$2.17M	Buy	+90,101	New	+$2.14M	﹤0.01%	2251