Laurion 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
2020 Q3	–	Sell	-20,636	Closed	-$326K	–	1236
2020 Q2	$326K	Sell	20,636 -52,385	-72%	-$751K	0.01%	710
2020 Q1	$1.08M	Buy	73,021 +27,511	+60%	+$534K	0.03%	467
2019 Q4	$1.07M	Buy	45,510 +19,802	+77%	+$449K	0.05%	557
2019 Q3	$561K	Buy	+25,708	New	+$508K	0.02%	748
2016 Q2	–	Sell	-20,455	Closed	-$381K	–	1179
2016 Q1	$381K	Buy	+20,455	New	+$335K	0.03%	563
2015 Q4	–	Hold	0	–	–	–	1187
2015 Q3	–	Sell	-82,714	Closed	-$1.9M	–	1058
2015 Q2	$1.99M	Sell	82,714 -240,364	-74%	-$5.71M	0.09%	396
2015 Q1	$6.76M	Buy	+323,078	New	+$6.57M	0.71%	142