Parallax Volatility Advisers’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
2023 Q1	–	Sell	-31,976	Closed	-$908K	–	3574
2022 Q4	$908K	Buy	+31,976	New	+$881K	0.02%	1688
2021 Q2	–	Sell	-112	Closed	-$3K	–	1922
2021 Q1	$3K	Sell	112 -52,301	-100%	-$1.31M	﹤0.01%	1248
2020 Q4	$1.03M	Buy	+52,413	New	+$974K	0.01%	1429
2019 Q4	–	Sell	-146	Closed	-$3K	–	2728
2019 Q3	$3K	Buy	146 +103	+240%	+$2.03K	﹤0.01%	2212
2019 Q2	$1K	Sell	43 -6,669	-99%	-$106K	﹤0.01%	2454
2019 Q1	$105K	Hold	6,712	–	–	﹤0.01%	2104
2018 Q4	$82K	Buy	6,712 +6,156	+1,107%	+$85.1K	﹤0.01%	1991
2018 Q3	$10K	Sell	556 -4,611	-89%	-$100K	﹤0.01%	2245
2018 Q2	$133K	Buy	+5,167	New	+$144K	﹤0.01%	1452
2018 Q1	–	Sell	-89,538	Closed	-$2.76M	–	4600
2017 Q4	$2.77M	Buy	+89,538	New	+$2.69M	0.08%	804
2017 Q3	–	Sell	-33,074	Closed	-$926K	–	3803
2017 Q2	$926K	Buy	33,074 +31,699	+2,305%	+$825K	0.03%	1048
2017 Q1	$33K	Sell	1,375 -1,713	-55%	-$40.2K	﹤0.01%	2782
2016 Q4	$71K	Sell	3,088 -164,888	-98%	-$3.46M	﹤0.01%	2350
2016 Q3	$2.99M	Buy	+167,976	New	+$3.25M	0.11%	867