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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)
Original 13F HR (0001172661-16-003859) filed in 2016.08.15
#
Name
Shares
Value ($)
%
Options
Notes
1 SIX FLAGS ENTMT CORP NEW 103,750 6,012 2.58%
2 MARTIN MARIETTA MATLS INC 30,627 5,880 2.52%
3 WR GRACE & CO 70,630 5,171 2.22%
4 MASONITE INTL CORP NEW COM 72,235 4,778 2.05%
5 RAPTOR PHARMACEUTICAL CORP 848,880 4,558 1.95%
6 HORIZON PHARMA PLC 270,652 4,458 1.91%
7 ADEPTUS HEALTH INC 78,129 4,036 1.73%
8 AMAZON COM INC 5,625 4,025 1.72%
9 NEVRO CORP COM 52,811 3,895 1.67%
10 ALLERGAN PLC 15,626 3,611 1.55%
11 SIX FLAGS ENTMT CORP NEW 62,250 3,607 1.55%
12 MARTIN MARIETTA MATLS INC 18,373 3,528 1.51%
13 ULTA BEAUTY INC 14,376 3,503 1.50%
14 INTUITIVE SURGICAL INC 5,250 3,472 1.49%
15 GIGAMON INC 90,005 3,365 1.44%
16 WR GRACE & CO 42,370 3,102 1.33%
17 FIVE BELOW INC 65,632 3,046 1.30%
18 FACEBOOK INC 26,562 3,036 1.30%
19 AETNA INC NEW 23,751 2,901 1.24%
20 MASONITE INTL CORP NEW COM 43,415 2,871 1.23%
21 VULCAN MATLS CO 23,126 2,783 1.19%
22 RAPTOR PHARMACEUTICAL CORP 509,120 2,734 1.17%
23 HORIZON PHARMA PLC 162,348 2,674 1.15%
24 CONSTELLATION BRANDS INC 15,001 2,481 1.06%
25 NETFLIX INC 26,877 2,459 1.05%
26 ADEPTUS HEALTH INC 46,871 2,421 1.04%
27 AMAZON COM INC 3,375 2,415 1.03%
28 NEVRO CORP COM 31,689 2,337 1.00%
29 LIBERTY MEDIA CORP DEL 158,783 2,328 1.00%
30 ALLERGAN PLC 9,374 2,166 0.93%
31 SHAKE SHACK INC 58,124 2,117 0.91%
32 ULTA BEAUTY INC 8,624 2,101 0.90%
33 INTUITIVE SURGICAL INC 3,150 2,083 0.89%
34 O REILLY AUTOMOTIVE INC NEW 7,625 2,067 0.89%
35 GLAUKOS CORP 70,629 2,060 0.88%
36 GIGAMON INC 53,995 2,019 0.86%
37 BMC STK HLDGS INC 108,052 1,925 0.82%
38 ALDER BIOPHARMACEUTICALS INC 75,941 1,896 0.81%
39 FIVE BELOW INC 39,368 1,827 0.78%
40 FACEBOOK INC 15,938 1,821 0.78%
41 AETNA INC NEW 14,249 1,740 0.75%
42 VULCAN MATLS CO 13,874 1,670 0.72%
43 ADVANCED DRAIN SYS INC DEL 59,384 1,625 0.70%
44 ALKERMES PLC 37,502 1,621 0.69%
45 MEDIDATA SOLUTIONS INC 34,376 1,611 0.69%
46 EAGLE MATERIALS INC 20,313 1,567 0.67%
47 TIME WARNER INC 20,626 1,517 0.65%
48 CONSTELLATION BRANDS INC 8,999 1,488 0.64%
49 NETFLIX INC 16,123 1,475 0.63%
50 MICROSOFT CORP 28,751 1,471 0.63%
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