Marshall Wace North America’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 Q4	–	Sell	-91,747	Closed	-$1.49M	–	1647
2020 Q3	$1.49M	Buy	+91,747	New	+$1.47M	0.01%	680
2020 Q1	–	Sell	-68,222	Closed	-$1.6M	–	1661
2019 Q4	$1.6M	Buy	+68,222	New	+$1.55M	0.01%	619
2019 Q1	–	Sell	-218,958	Closed	-$2.67M	–	1972
2018 Q4	$2.67M	Sell	218,958 -82,559	-27%	-$1.14M	0.03%	375
2018 Q3	$5.39M	Buy	301,517 +54,683	+22%	+$1.19M	0.04%	304
2018 Q2	$6.37M	Sell	246,834 -152,242	-38%	-$4.24M	0.04%	455
2018 Q1	$11.9M	Buy	399,076 +45,970	+13%	+$1.42M	0.06%	360
2017 Q4	$10.9M	Buy	+353,106	New	+$10.6M	0.06%	358
2017 Q2	–	Sell	-579,488	Closed	-$14M	–	1489
2017 Q1	$14M	Buy	+579,488	New	+$13.6M	0.11%	214