BlackRock Advisors’s Summit Materials, Inc. Class A Common Stock SUM Stock Holding History

BlackRock Advisors’s Portfolio SUM Stock Details SUM Fund Activity

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Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2016 Q4	$2.39M	Buy
2016 Q3	$1.6M	Sell
2016 Q2	$1.92M	Sell
2016 Q1	$2.32M	Buy
2015 Q4	$1.36M	Buy
2015 Q3	$350K	Buy
2015 Q2	$329K	Buy