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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 (2014Q1)
Original 13F HR (0001172661-14-001101) filed in 2014.05.15
#
Name
Shares
Value ($)
%
Options
Notes
1 PUMA BIOTECHNOLOGY 3,728 388 0.09%
2 CONCERT PHARMACEUTICALS INCORPORATED 59,553 801 0.18%
3 EXELIXIS INC 249,000 881 0.20%
4 GW PHARMACEUTICALS PLC 17,750 1,054 0.24%
5 AVANIR PHARMACEUTICALS INC CL 300,000 1,101 0.25%
6 VERTEX PHARMACEUTICALS INC 16,000 1,132 0.26%
7 INFINITY PHARMACEUTICALS INC 97,500 1,159 0.27%
8 ENTEROMEDICS INC 650,000 1,183 0.27%
9 Arrowhead Pharma Inc 75,000 1,232 0.28%
10 NOVAVAX INC COM 325,000 1,472 0.34%
11 ALKERMES PLC 35,500 1,565 0.36%
12 KINDRED BIOSCIENCES INC 92,500 1,714 0.40%
13 Wuxi Pharmatech Inc ADR 52,500 1,935 0.45%
14 ADVISORY BRD CO COM 31,075 1,997 0.46%
15 MEDNAX INC 32,500 2,014 0.46%
16 Receptos Inc 50,000 2,097 0.48%
17 CASTLIGHT HEALTH INC COM CL B 100,000 2,122 0.49%
18 CUBIST PHARMACEUTI 30,000 2,195 0.51%
19 REGENERON PHARMACEUTICALS 7,500 2,252 0.52%
20 CERNER CORP 42,000 2,363 0.55%
21 PROTHENA CORP PLC 65,000 2,490 0.57%
22 ULTRAGENYX PHARMACEUTICAL INC COM 51,500 2,518 0.58%
23 INNOVIVA INC COM 83,250 2,576 0.59%
24 National Australia Bank ADR 53,000 2,588 0.60%
25 JAZZ PHARMACEUTICALS PLC 19,750 2,739 0.63%
26 RTI SURGICAL HOLDINGS INC COM 686,382 2,800 0.65%
27 FEI COMPANY 27,500 2,833 0.65%
28 CHINA CORD BLOOD CORP 717,500 2,870 0.66%
29 DICERNA PHARMACEUTICALS INC 105,000 2,966 0.68%
30 CHARLES RIV LABS INTL INC 49,500 2,987 0.69%
31 ATHENA HEALTH INC. 19,500 3,125 0.72%
32 PHARMACYCLICS INC 31,500 3,157 0.73%
33 WELLCARE HEALTH PLANS INC 51,500 3,271 0.75%
34 COVANCE INC 32,500 3,377 0.78%
35 INCYTE CORP 63,500 3,399 0.78%
36 MEDICINES CO 120,000 3,410 0.79%
37 FIVE PRIME THERAPEUTICS INC 175,000 3,441 0.79%
38 HCA HOLDINGS INC 67,000 3,518 0.81%
39 STERICYCLE INC 31,000 3,522 0.81%
40 UNIVERSAL HLTH SVCS INC 45,000 3,693 0.85%
41 TESARO INCORPORATED 129,500 3,818 0.88%
42 PACIRA PHARMACEUTICALS INC 61,000 4,269 0.98%
43 INTERCEPT PHARMACEUTICALS INCORPORATED 13,000 4,287 0.99%
44 PERRIGO CO PLC 28,500 4,408 1.02%
45 ENVISION HEALTHCARE HLDGS INC 137,500 4,652 1.07%
46 Walgreens 70,500 4,655 1.07%
47 Heartware International, Inc. 50,000 4,689 1.08%
48 NEUROCRINE BIOSCIE COM USD0.001 300,000 4,830 1.11%
49 FOREST LABS INC COM 54,000 4,983 1.15%
50 CARDINAL HEALTH INC 76,000 5,318 1.23%
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