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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 DYAX CORP COM CVR 114,500 2,186 0.18%
2 ABBVIE INC 746,423 40,613 3.30%
3 ACADIA COMPANY COM 812,000 53,811 4.37%
4 ACHILLION PHARMACEUTICALS IN 1,125,000 7,774 0.63%
5 ADAPTIMMUNE THERAPEUTICS PLC 756,100 9,051 0.73%
6 ADEPTUS HEALTH INC 178,000 14,375 1.17%
7 ADR - Nabriva Therapeutics AG- Usd 324,400 3,082 0.25%
8 ADURO BIOTECH INC 415,000 8,039 0.65%
9 ADVAXIS INC COM NEW 337,000 3,448 0.28%
10 AETNA INC NEW 386,000 42,232 3.43%
11 AIMMUNE THERAPEUTICS INC COM 200,000 5,064 0.41%
12 ALEXION PHARMACEUTIC 172,000 26,899 2.18%
13 ALLERGAN PLC 126,000 34,248 2.78%
14 ALLERGAN PLC 5,000 4,728 0.38%
15 AMGEN INC 83,250 11,515 0.93%
16 AMICUS THERAPEUTICS INC COM 455,000 6,365 0.52%
17 ANTHEM INC 87,500 12,250 0.99%
18 ANTHERA PHARMACEUTICALS I 400,000 2,436 0.20%
19 ARATANA THERAPEUTICS INC 485,000 4,103 0.33%
20 ARDELYX INC COM 681,500 11,776 0.96%
21 ASSEMBLY BIOSCIENCES INC 371,000 3,547 0.29%
22 ATHENA HEALTH INC. 38,000 5,067 0.41%
23 Anacor Pharmaceuticals Inc 86,000 10,123 0.82%
24 Ascendis Pharma 270,000 4,779 0.39%
25 BIODEL INC 4,000,000 1,760 0.14%
26 BIOGEN INC 38,650 11,278 0.92%
27 BIOMARIN PHARMACEUTICAL INC 50,500 5,319 0.43%
28 BLUEBIRD BIO INC COM 45,000 3,850 0.31%
29 CARDIOME PHARMA CORP 1,190,000 10,044 0.82%
30 CASTLIGHT HEALTH INC COM CL B 1,000,000 4,200 0.34%
31 CELGENE CORP 198,000 21,418 1.74%
32 CERULEAN PHARMA INC 625,000 2,288 0.19%
33 CHIASMA INC 522,500 10,387 0.84%
34 CHINA CORD BLOOD CORP 880,000 5,298 0.43%
35 CIDARA THERAPEUTICS INC 275,000 3,498 0.28%
36 CIGNA CORPORATION 122,000 16,472 1.34%
37 COHERUS BIOSCIENCES INC COM 285,000 5,711 0.46%
38 COLLEGIUM PHARMACEUTICAL INC COM 994,400 21,986 1.78%
39 COMPUGEN LTD 525,000 2,714 0.22%
40 CONNECTURE INC 365,000 1,664 0.14%
41 COOPER COS INC 61,900 9,214 0.75%
42 CVS HEALTH CORP 120,000 11,578 0.94%
43 DAVITA INC 122,050 8,828 0.72%
44 DBV TECHNOLOGIES S A 25,000 890 0.07%
45 DERMIRA INC COM 300,001 7,002 0.57%
46 DYNAVAX TECHNOLOGIES CORP 150,000 3,681 0.30%
47 ENDOCHOICE HLDGS INC 576,000 6,543 0.53%
48 ENVISION HEALTHCARE HLDGS INC 570,000 20,970 1.70%
49 EPIZYME INC COM 310,000 3,987 0.32%
50 Egalet Corp 300,000 3,954 0.32%
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