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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 (2016Q2)
Portfolio Summary: 60 holdings with a total value of $233,442,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 SPDR S&P 500 ETF TR 180,000 37,706,000 16.15% Put
2 SIX FLAGS ENTMT CORP NEW 166,000 9,619,000 4.12%
3 MARTIN MARIETTA MATLS INC 49,000 9,408,000 4.03%
4 WR GRACE & CO 113,000 8,273,000 3.54%
5 MASONITE INTL CORP NEW COM 115,650 7,649,000 3.28%
6 RAPTOR PHARMACEUTICAL CORP 1,358,000 7,292,000 3.12%
7 HORIZON PHARMA PLC 433,000 7,132,000 3.06%
8 Adeptus Health Inc 125,000 6,457,000 2.77%
9 AMAZON COM INC 9,000 6,440,000 2.76%
10 NEVRO CORP 84,500 6,232,000 2.67%
11 ALLERGAN PLC 25,000 5,777,000 2.47%
12 ULTA BEAUTY INC 23,000 5,604,000 2.40%
13 INTUITIVE SURGICAL INC 8,400 5,555,000 2.38%
14 GIGAMON INC 144,000 5,384,000 2.31%
15 FIVE BELOW INC COM 105,000 4,873,000 2.09%
16 FACEBOOK INC 42,500 4,857,000 2.08%
17 AETNA INC NEW 38,000 4,641,000 1.99%
18 VULCAN MATLS CO 37,000 4,453,000 1.91%
19 CONSTELLATION BRANDS INC 24,000 3,969,000 1.70%
20 NETFLIX INC 43,000 3,934,000 1.69%
21 LIBERTY BRAVES GR C 254,000 3,724,000 1.60%
22 SHAKE SHACK INC CL A 93,000 3,388,000 1.45%
23 O REILLY AUTOMOTIVE INC NEW 12,200 3,307,000 1.42%
24 GLAUKOS CORP 113,000 3,296,000 1.41%
25 UNITED THERAPEUTICS 29,500 3,125,000 1.34% Call
26 BMC STK HLDGS INC 173,000 3,082,000 1.32%
27 ALDER BIOPHARMACEUTICALS INC 121,500 3,034,000 1.30%
28 ADVANCED DRAIN SYS INC DEL 95,000 2,600,000 1.11%
29 ALKERMES PLC SHS 60,000 2,593,000 1.11%
30 MEDIDATA SOLUTIONS INC 55,000 2,578,000 1.10%
31 EAGLE MATERIALS INC 32,500 2,507,000 1.07%
32 TIME WARNER INC 33,000 2,427,000 1.04%
33 RAPTOR PHARMACEUTICAL CORP 446,000 2,393,000 1.03% Call
34 MICROSOFT CORP 46,000 2,354,000 1.01%
35 CTRIP COM INTL LTD 57,000 2,349,000 1.01%
36 SHIRE PLC 12,500 2,301,000 0.99%
37 VAIL RESORTS INC 16,000 2,212,000 0.95%
38 HALYARD HEALTH INC 65,000 2,113,000 0.91%
39 EPAM SYS INC 32,000 2,058,000 0.88%
40 GRUBHUB INC 66,000 2,051,000 0.88%
41 ALPHABET INC 2,900 2,007,000 0.86%
42 LILLY ELI & CO 24,000 1,890,000 0.81% Call
43 DOMINOS PIZZA (USD) 14,000 1,840,000 0.79%
44 2U, Inc. 60,000 1,765,000 0.76%
45 GW PHARMACEUTICALS PLC 17,000 1,557,000 0.67%
46 NXSTAGE MED INC COM 71,000 1,539,000 0.66%
47 BOSTON SCIENTIFIC CORP 64,000 1,495,000 0.64%
48 OPHTHOTECH CORP COM 29,000 1,480,000 0.63%
49 WR GRACE & CO 18,000 1,318,000 0.56% Call
50 HUMANA 7,000 1,259,000 0.54%
Page 1 of 2

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001172661-16-003859, filed 2016.08.15).

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.