Driehaus Capital 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
2024 Q1	–	Sell	-643,980	Closed	-$24.8M	–	457
2023 Q4	$24.8M	Buy	643,980 +73,195	+13%	+$2.54M	0.3%	103
2023 Q3	$17.8M	Sell	570,785 -22,197	-4%	-$790K	0.23%	146
2023 Q2	$22.4M	Buy	+592,982	New	+$18.4M	0.28%	113
2022 Q1	–	Sell	-1,084,006	Closed	-$42.8M	–	461
2021 Q4	$42.8M	Buy	1,084,006 +271,979	+33%	+$9.96M	0.44%	70
2021 Q3	$25.5M	Buy	812,027 +45,997	+6%	+$1.5M	0.3%	100
2021 Q2	$26.3M	Buy	766,030 +382,230	+100%	+$12M	0.35%	88
2021 Q1	$10.6M	Buy	+383,800	New	+$9.65M	0.16%	197
2018 Q2	–	Sell	-64,391	Closed	-$1.92M	–	581
2018 Q1	$1.92M	Buy	+64,391	New	+$1.99M	0.07%	269
2017 Q2	–	Sell	-40,936	Closed	-$981K	–	657
2017 Q1	$981K	Sell	40,936 -89,503	-69%	-$2.1M	0.03%	364
2016 Q4	$3.01M	Buy	+130,439	New	+$2.74M	0.11%	210
2016 Q3	–	Sell	-311,222	Closed	-$6.1M	–	628
2016 Q2	$6.1M	Sell	311,222 -861	-0.3%	-$17.2K	0.22%	102
2016 Q1	$5.82M	Buy	312,083 +246,475	+376%	+$4.03M	0.19%	107
2015 Q4	$1.26M	Sell	65,608 -2,122	-3%	-$43.3K	0.04%	361
2015 Q3	$1.2M	Sell	67,730 -3,691	-5%	-$85K	0.04%	332
2015 Q2	$1.72M	Buy	+71,421	New	+$1.7M	0.06%	358