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Institutional Investment Manager
Atika Capital Management LLC
Atika Capital Management LLC (CIK: 0001599731) incorporated in Delaware, located at 475 Tenth Avenue, 14th Floor, New York, NY. Institutional holdings reported to the SEC.

Institutional Holdings (2016Q3)
Portfolio Summary: 66 holdings with a total value of $244,858,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 ISHARES TR 208,000 25,836,000 10.55% Put
2 SPDR SER TR 170,000 11,269,000 4.60% Put
3 WR GRACE & CO 145,000 10,701,000 4.37%
4 NEVRO CORP 77,000 8,038,000 3.28%
5 GIGAMON INC 139,000 7,617,000 3.11%
6 INTUITIVE SURGICAL INC 9,500 6,886,000 2.81%
7 AUTODESK 90,000 6,510,000 2.66%
8 GW PHARMACEUTICALS PLC 49,000 6,504,000 2.66%
9 FACEBOOK INC 49,000 6,285,000 2.57%
10 MICROSOFT CORP 94,650 5,451,000 2.23%
11 MARTIN MARIETTA MATLS INC 30,000 5,373,000 2.19%
12 SHIRE PLC 27,000 5,234,000 2.14%
13 LIBERTY BRAVES GR C 300,000 5,214,000 2.13%
14 TESARO INC 50,000 5,012,000 2.05%
15 GLAUKOS CORP 128,400 4,846,000 1.98%
16 HORIZON PHARMA PLC 265,000 4,805,000 1.96%
17 MASONITE INTL CORP NEW COM 75,000 4,663,000 1.90%
18 ALPHABET INC 5,375 4,178,000 1.71%
19 EDWARDS LIFESCIENCES CORP 34,000 4,099,000 1.67%
20 DICKS SPORTING GOODS 72,000 4,084,000 1.67%
21 AERIE PHARMACEUTICALS INC 100,000 3,774,000 1.54%
22 CONSTELLATION BRANDS INC 20,500 3,413,000 1.39%
23 NETFLIX INC 34,150 3,366,000 1.37%
24 GALAPAGOS NV 52,000 3,362,000 1.37%
25 AMAZON COM INC 3,910 3,274,000 1.34%
26 BIOMARIN 35,000 3,238,000 1.32%
27 VAIL RESORTS INC 20,000 3,138,000 1.28%
28 BMC STK HLDGS INC 174,550 3,095,000 1.26%
29 ALKERMES PLC SHS 63,450 2,984,000 1.22%
30 BIG 5 SPORTING GOODS CORP COM 212,000 2,888,000 1.18%
31 ALDER BIOPHARMACEUTICALS INC 88,000 2,884,000 1.18%
32 COLUCID PHARMACEUTICALS INC COM 75,000 2,862,000 1.17%
33 SHAKE SHACK INC CL A 80,000 2,773,000 1.13%
34 EXACT SCIENCES CORP 148,300 2,754,000 1.12%
35 2U, Inc. 70,350 2,694,000 1.10%
36 RAPTOR PHARMACEUTICAL CORP 300,000 2,691,000 1.10% Call
37 RAPTOR PHARMACEUTICAL CORP 298,200 2,672,000 1.09%
38 SELECT MED HLDGS CORP COM 189,000 2,551,000 1.04%
39 MEDIDATA SOLUTIONS INC 45,000 2,509,000 1.02%
40 MEDICINES CO 65,000 2,453,000 1.00%
41 RADIUS HEALTH 45,000 2,434,000 0.99%
42 TIME WARNER INC 30,000 2,388,000 0.98%
43 BIOGEN INC 7,500 2,347,000 0.96%
44 SPORTSMANS WAREHOUSE 220,000 2,314,000 0.95%
45 VULCAN MATLS CO 20,000 2,274,000 0.93%
46 RINGCENTRAL INC 88,000 2,082,000 0.85%
47 WR GRACE & CO 28,000 2,067,000 0.84% Call
48 Adeptus Health Inc 47,700 2,053,000 0.84%
49 GRUBHUB INC 47,500 2,042,000 0.83%
50 Acxiom Corp 75,000 1,999,000 0.82%
Page 1 of 2

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001172661-16-004309, filed 2016.11.14).

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.