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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 (2015Q2)
Portfolio Summary: 66 holdings with a total value of $222,090,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 NETFLIX INC 17,750 11,661,000 5.25%
2 Receptos Inc 50,000 9,503,000 4.28%
3 Adeptus Health Inc 90,000 8,549,000 3.85%
4 MARTIN MARIETTA MATLS INC 60,300 8,533,000 3.84%
5 FACEBOOK INC 98,000 8,405,000 3.78%
6 ALLERGAN PLC 26,150 7,936,000 3.57%
7 MASONITE INTL CORP NEW COM 112,000 7,852,000 3.54%
8 LILLY ELI & CO 90,000 7,514,000 3.38% Call
9 ClubCorp Hldgs Inc 270,600 6,462,000 2.91%
10 AMAG PHARMACEUTICALS INC COM 85,950 5,936,000 2.67%
11 ILLUMINA INC 24,000 5,241,000 2.36%
12 HORIZON PHARMA PLC 129,650 4,504,000 2.03%
13 PORTOLA PHARMACEUTICALS INC 98,000 4,464,000 2.01%
14 RADIUS HEALTH 64,000 4,333,000 1.95%
15 CIGNA CORPORATION 26,500 4,293,000 1.93%
16 ABBVIE INC 61,850 4,156,000 1.87%
17 ABIOMED INC 62,000 4,075,000 1.83%
18 SS&C TECHNOLOGIES HLDGS INC 65,000 4,062,000 1.83%
19 DIAMOND RESORTS INTL INC COM 123,600 3,899,000 1.76%
20 HUMANA 20,000 3,826,000 1.72%
21 SHIRE PLC 15,500 3,743,000 1.69%
22 UNIVERSAL HLTH SVCS INC 26,000 3,694,000 1.66%
23 NEUROCRINE BIOSCIE COM USD0.001 72,350 3,456,000 1.56%
24 TRANSDIGM GROUP INC COM 15,300 3,438,000 1.55%
25 GOOGLE INC 6,550 3,410,000 1.54%
26 BARRETT BUSINESS SERVICES IN COM 93,500 3,396,000 1.53%
27 SELECT COMFORT CORP 110,000 3,307,000 1.49%
28 CLOVIS ONCOLOGY INC 37,000 3,251,000 1.46%
29 BLUEBIRD BIO INCORPORATED 19,000 3,199,000 1.44%
30 CENTENE CORP DEL 39,000 3,135,000 1.41%
31 GENTHERM INC COM 57,000 3,130,000 1.41%
32 JAZZ PHARMACEUTICALS PLC SHS USD 17,000 2,994,000 1.35%
33 ACADIA HEALTHCARE COMPANY IN 37,550 2,942,000 1.32%
34 ALNYLAM PHARMACEUTICALS INC 24,000 2,877,000 1.30%
35 RITE AID CORP 320,000 2,672,000 1.20%
36 ASTRONICS CORP COM 37,350 2,647,000 1.19%
37 AMICUS THERAPEUTICS INC 184,400 2,609,000 1.17%
38 DISNEY WALT CO 22,550 2,574,000 1.16%
39 SOLARCITY CORP 47,350 2,536,000 1.14%
40 SAGE THERAPEUTICS 33,000 2,409,000 1.08%
41 SKECHERS U S A INC 21,000 2,306,000 1.04%
42 LULULEMON ATHLETICA 35,000 2,286,000 1.03%
43 TEMPUR SEALY INTL INC COM 34,000 2,241,000 1.01%
44 GALAPAGOS NV 40,100 2,065,000 0.93%
45 ICON PLC 30,450 2,049,000 0.92%
46 VULCAN MATLS CO 23,150 1,943,000 0.87%
47 SHOPIFY INC 54,100 1,837,000 0.83%
48 Anacor Pharmaceuticals Inc 21,000 1,626,000 0.73%
49 SUMMIT MATLS INC CL A 61,000 1,555,000 0.70%
50 AXOVANT SCIENCES LTD 75,000 1,528,000 0.69%
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Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001172661-15-001629, filed 2015.08.14).

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.