Broadview Advisors’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
2018 Q4	–	Sell	-170,092	Closed	-$3.04M	–	97
2018 Q3	$3.04M	Sell	170,092 -265,915	-61%	-$5.78M	0.52%	67
2018 Q2	$11.3M	Sell	436,007 -12,495	-3%	-$348K	1.8%	14
2018 Q1	$13.4M	Sell	448,502 -3,344	-0.7%	-$103K	2.19%	8
2017 Q4	$14M	Sell	451,846 -61,821	-12%	-$1.86M	1.99%	13
2017 Q3	$16M	Buy	513,667 +62,887	+14%	+$1.78M	2.33%	9
2017 Q2	$12.6M	Sell	450,780 -3,712	-0.8%	-$96.6K	1.87%	13
2017 Q1	$10.9M	Sell	454,492 -52,448	-10%	-$1.23M	1.5%	22
2016 Q4	$11.7M	Sell	506,940 -37,153	-7%	-$780K	1.56%	23
2016 Q3	$9.67M	Buy	544,093 +17,324	+3%	+$335K	1.37%	31
2016 Q2	$10.3M	Buy	526,769 +318,928	+153%	+$6.37M	1.54%	23
2016 Q1	$3.87M	Buy	207,841 +82,908	+66%	+$1.36M	0.56%	62
2015 Q4	$2.4M	Buy	124,933 +17,841	+17%	+$364K	0.34%	69
2015 Q3	$1.9M	Buy	107,092 +85,880	+405%	+$1.98M	0.26%	70
2015 Q2	$511K	Buy	21,212 +27	+0.1%	+$641	0.05%	92
2015 Q1	$443K	Buy	+21,185	New	+$431K	0.04%	91