Luminus 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
2019 Q2	–	Sell	-467,947	Closed	-$7.3M	–	154
2019 Q1	$7.3M	Buy	467,947 +62,842	+16%	+$982K	0.17%	85
2018 Q4	$4.94M	Sell	405,105 -3,191,319	-89%	-$44.1M	0.12%	111
2018 Q3	$64.3K	Buy	3,596,424 +1,440,117	+67%	+$31.3M	1.2%	26
2018 Q2	$55.7M	Buy	2,156,307 +627,280	+41%	+$17.5M	1.28%	26
2018 Q1	$45.5M	Buy	1,529,027 +538,884	+54%	+$16.6M	1%	32
2017 Q4	$30.6M	Buy	990,143 +66,136	+7%	+$1.99M	0.79%	32
2017 Q3	$28.7M	Sell	924,007 -304,474	-25%	-$8.64M	0.9%	34
2017 Q2	$34.4M	Sell	1,228,481 -11,294	-0.9%	-$294K	0.91%	45
2017 Q1	$29.7M	Buy	1,239,775 +298,944	+32%	+$7.01M	0.93%	37
2016 Q4	$21.7M	Sell	940,831 -202,452	-18%	-$4.25M	0.65%	48
2016 Q3	$20.3M	Buy	1,143,283 +386,391	+51%	+$7.48M	0.64%	47
2016 Q2	$14.8M	Buy	756,892 +265,037	+54%	+$5.29M	0.56%	53
2016 Q1	$9.17M	Buy	491,855 +1,344	+0.3%	+$22K	0.34%	66
2015 Q4	$9.42M	Buy	490,511 +14,452	+3%	+$295K	0.37%	65
2015 Q3	$8.44M	Buy	+476,059	New	+$11M	0.28%	68