Ardsley Advisory Partners’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	-28,527	Closed	-$421K	–	176
2020 Q1	$421K	Buy	+28,527	New	+$554K	0.18%	66
2018 Q3	–	Sell	-25,425	Closed	-$657K	–	194
2018 Q2	$657K	Buy	+25,425	New	+$708K	0.11%	93
2017 Q4	–	Sell	-25,781	Closed	-$801K	–	186
2017 Q3	$801K	Buy	+25,781	New	+$732K	0.14%	78
2017 Q2	–	Sell	-86,552	Closed	-$2.07M	–	203
2017 Q1	$2.07M	Sell	86,552 -397,162	-82%	-$9.32M	0.41%	67
2016 Q4	$11.2M	Buy	483,714 +80,879	+20%	+$1.7M	2.33%	10
2016 Q3	$7.16M	Buy	+402,835	New	+$7.8M	1.31%	31
2015 Q2	–	Sell	-227,742	Closed	-$4.76M	–	252
2015 Q1	$4.76M	Buy	+227,742	New	+$4.63M	0.82%	46