ACM
SUM

Atika Capital Management’s Summit Materials, Inc. Class A Common Stock SUM Stock Holding History

Atika Capital Management’s Portfolio SUM Stock Details SUM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2017
Q4 		– Sell
-76,827
Closed -$2.39M – 86
2017
Q3 		$2.39M Sell
76,827
-41,765
-35% -$1.19M 0.98% 57
2017
Q2 		$3.32M Hold
118,592
– – 1.48% 29
2017
Q1 		$2.84M Sell
118,592
-84,788
-42% -$1.99M 1.49% 31
2016
Q4 		$4.69M Buy
+203,380
New +$4.27M 2.81% 12
2016
Q1 		– Sell
-134,077
Closed -$2.57M – 68
2015
Q4 		$2.57M Sell
134,077
-35,406
-21% -$722K 1.43% 31
2015
Q3 		$3M Buy
169,483
+104,868
+162% +$2.42M 1.68% 22
2015
Q2 		$1.55M Buy
+64,615
New +$1.53M 0.75% 49

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Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
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Jennison Associates
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Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
TBC
Three Bays Capital Boston, Massachusetts $757M AUM 7.41% 1-Year Est. Return
PI
Putnam Investments Boston, Massachusetts $75.7B AUM 34.45% 1-Year Est. Return
Adage Capital Partners
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Westfield Capital Management
Westfield Capital Management Boston, Massachusetts $23.8B AUM 49.45% 1-Year Est. Return
BAMCO Inc
BAMCO Inc New York $33.1B AUM 11.16% 1-Year Est. Return