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Institutional Investment Manager
Rock Springs Capital Management LP
Rock Springs Capital Management LP (CIK: 0001595725) incorporated in Delaware, located at 650 South Exeter Street, Baltimore, MD. Institutional holdings reported to the SEC.

Institutional Holdings (2015Q3)
Original 13F HR (0001172661-15-002063) filed in 2015.11.16
#
Name
Shares
Value ($)
%
Options
Notes
1 ALLERGAN PLC 5,000 4,728 0.38%
2 REGENERON PHARMACEUTICALS 11,000 5,117 0.42%
3 PUMA BIOTECHNOLOGY 15,900 1,198 0.10%
4 DBV TECHNOLOGIES S A 25,000 890 0.07%
5 INTERCEPT PHARMACEUTICALS INCORPORATED 32,500 5,390 0.44%
6 INTUITIVE SURGICAL INC 36,000 16,545 1.34%
7 ATHENA HEALTH INC. 38,000 5,067 0.41%
8 BIOGEN INC 38,650 11,278 0.92%
9 PTC THERAPEUTICS INC 42,960 1,147 0.09%
10 BLUEBIRD BIO INC COM 45,000 3,850 0.31%
11 SPARK THERAPEUTICS INCORPORATED 45,700 1,907 0.15% Put
12 BIOMARIN PHARMACEUTICAL INC 50,500 5,319 0.43%
13 JAZZ PHARMACEUTICALS PLC 51,500 6,840 0.56%
14 GLOBAL BLOOD THERAPEUTICS INCORPORATED 60,000 2,530 0.21%
15 COOPER COS INC 61,900 9,214 0.75%
16 MCKESSON CORP 70,000 12,952 1.05%
17 VERTEX PHARMACEUTICALS INC 72,250 7,524 0.61%
18 AMGEN INC 83,250 11,515 0.93%
19 GW PHARMACEUTICALS PLC 85,500 7,812 0.63%
20 Anacor Pharmaceuticals Inc 86,000 10,123 0.82%
21 ANTHEM INC 87,500 12,250 0.99%
22 KITE PHARMA INCORPORATED 91,500 5,095 0.41%
23 THERMO FISHER SCIENTIFIC INC 100,000 12,228 0.99%
24 ULTRAGENYX PHARMACEUTICAL INC COM 107,000 10,305 0.84%
25 IDEXX LAB 112,500 8,353 0.68%
26 VALEANT PHARMACEUTICALS INTL 112,500 20,068 1.63%
27 INCYTE CORP 113,000 12,467 1.01%
28 DYAX CORP COM CVR 114,500 2,186 0.18%
29 THORATEC LABS CORP 120,000 7,591 0.62%
30 CVS HEALTH CORP 120,000 11,578 0.94%
31 FIVE PRIME THERAPEUTICS INC 120,000 1,847 0.15%
32 CIGNA CORPORATION 122,000 16,472 1.34%
33 DAVITA INC 122,050 8,828 0.72%
34 MEDNAX INC 125,000 9,599 0.78%
35 ALLERGAN PLC 126,000 34,248 2.78%
36 DYNAVAX TECHNOLOGIES CORP 150,000 3,681 0.30%
37 ZS PHARMA INC 155,000 10,177 0.83%
38 PACIRA PHARMACEUTICALS INC 168,000 6,905 0.56%
39 ALEXION PHARMACEUTIC 172,000 26,899 2.18%
40 Wuxi Pharmatech Inc ADR 175,000 7,562 0.61%
41 ADEPTUS HEALTH INC 178,000 14,375 1.17%
42 INTRA-CELLULAR THERAPIES INC 180,000 7,207 0.58%
43 SERES THERAPEUTICS INC 180,000 5,335 0.43%
44 FIBROGEN INC 190,000 4,165 0.34%
45 PENUMBRA INC COM 195,000 7,820 0.63%
46 JUNO THERAPEUTICS INC COM 197,001 8,016 0.65%
47 CELGENE CORP 198,000 21,418 1.74%
48 AIMMUNE THERAPEUTICS INC COM 200,000 5,064 0.41%
49 GALAPAGOS NV 210,000 8,549 0.69%
50 INFINITY PHARMACEUTICALS INC 215,000 1,817 0.15%
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