OppenheimerFunds’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 Q1	$20.1M	Buy	1,291,072 +26,481	+2%	+$414K	0.03%	537
2018 Q4	$15.4M	Buy	1,264,591 +153,759	+14%	+$2.13M	0.02%	572
2018 Q3	$19.9M	Sell	1,110,832 -755,406	-40%	-$16.4M	0.02%	585
2018 Q2	$48.2M	Buy	1,866,238 +67,314	+4%	+$1.88M	0.06%	336
2018 Q1	$53.6M	Sell	1,798,924 -17,305	-1%	-$534K	0.07%	303
2017 Q4	$56.1M	Buy	1,816,229 +63,244	+4%	+$1.9M	0.07%	287
2017 Q3	$54.4M	Sell	1,752,985 -36,445	-2%	-$1.03M	0.07%	291
2017 Q2	$50.1M	Buy	1,789,430 +314,318	+21%	+$8.18M	0.06%	295
2017 Q1	$35.3M	Sell	1,475,112 -70,553	-5%	-$1.66M	0.04%	401
2016 Q4	$35.7M	Buy	1,545,665 +928,542	+150%	+$19.5M	0.05%	399
2016 Q3	$11M	Buy	617,123 +21,498	+4%	+$416K	0.01%	716
2016 Q2	$11.7M	Buy	595,625 +133,291	+29%	+$2.66M	0.02%	699
2016 Q1	$8.62M	Buy	462,334 +19,673	+4%	+$322K	0.01%	747
2015 Q4	$8.5M	Buy	442,661 +18,865	+4%	+$385K	0.01%	763
2015 Q3	$7.51M	Buy	+423,796	New	+$9.76M	0.01%	768