Oppenheimer Asset 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
2020 Q2	–	Sell	-1,979	Closed	-$29K	–	1466
2020 Q1	$29K	Sell	1,979 -1,322	-40%	-$25.7K	﹤0.01%	1341
2019 Q4	$78K	Sell	3,301 -1,047	-24%	-$23.8K	﹤0.01%	1255
2019 Q3	$95K	Sell	4,348 -2,294	-35%	-$45.3K	﹤0.01%	1197
2019 Q2	$126K	Buy	6,642 +15	+0.2%	+$239	﹤0.01%	1172
2019 Q1	$103K	Buy	6,627 +1,412	+27%	+$22.1K	﹤0.01%	1201
2018 Q4	$64K	Buy	+5,215	New	+$72.1K	﹤0.01%	1300
2018 Q3	–	Sell	-9,776	Closed	-$252K	–	1181
2018 Q2	$252K	Sell	9,776 -8,181	-46%	-$228K	0.01%	1004
2018 Q1	$535K	Buy	17,957 +668	+4%	+$20.6K	0.01%	770
2017 Q4	$545K	Sell	17,289 -242	-1%	-$7.28K	0.01%	763
2017 Q3	$545K	Sell	17,531 -4,397	-20%	-$125K	0.01%	767
2017 Q2	$614K	Sell	21,928 -6,622	-23%	-$172K	0.02%	723
2017 Q1	$684K	Buy	+28,550	New	+$670K	0.02%	703