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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 (2014Q3)
Portfolio Summary: 83 holdings with a total value of $646,405,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 AVALANCHE BIOTECHNOLOGIES IN 7,198 246,000 0.04%
2 CERULEAN PHARMA INC 85,635 361,000 0.06%
3 HERON THERAPEUTICS INC COM 70,000 583,000 0.09%
4 XENOPORT INC 146,000 785,000 0.12%
5 FIVE PRIME THERAPEUTICS INC 115,000 1,349,000 0.21%
6 ENTEROMEDICS INC 1,125,000 1,384,000 0.21%
7 Receptos Inc 22,500 1,397,000 0.22%
8 Arrowhead Pharma Inc 115,000 1,699,000 0.26%
9 CYMABAY THERAPEUTICS INC 300,000 2,052,000 0.32%
10 AERIE PHARMACEUTICALS INC COM 99,300 2,055,000 0.32%
11 KITE PHARMA INCORPORATED 82,474 2,351,000 0.36%
12 VERSARTIS INC 124,255 2,360,000 0.37%
13 PFENEX INC COM 325,000 2,392,000 0.37%
14 NOVAVAX INC COM 575,000 2,398,000 0.37%
15 ROKA BIOSCIENCE INC 250,000 2,513,000 0.39%
16 KINDRED BIOSCIENCES INC 275,000 2,544,000 0.39%
17 INFINITY PHARMACEUTICALS INC 210,000 2,818,000 0.44%
18 JAZZ PHARMACEUTICALS PLC 18,250 2,930,000 0.45%
19 RELYPSA INC 145,000 3,058,000 0.47%
20 CUBIST PHARMACEUTI 46,500 3,085,000 0.48%
21 INNOVIVA INC COM 190,000 3,247,000 0.50%
22 MEDICINES CO 148,250 3,309,000 0.51%
23 Wuxi Pharmatech Inc ADR 96,500 3,379,000 0.52%
24 LIVANOVA PLC 67,000 3,428,000 0.53%
25 FEI COMPANY 47,000 3,545,000 0.55%
26 EPIZYME INC COM 131,000 3,551,000 0.55%
27 INTERCEPT PHARMACEUTICALS INCORPORATED 15,100 3,574,000 0.55%
28 Theravance Biopharma Inc 155,500 3,584,000 0.55%
29 ZS PHARMA INC 92,000 3,609,000 0.56%
30 COVANCE INC 46,000 3,620,000 0.56%
31 TANDEM DIABETES CARE INC COM 277,000 3,717,000 0.58%
32 ULTRAGENYX PHARMACEUTICAL INC COM 67,500 3,821,000 0.59%
33 CHINA CORD BLOOD CORP 795,000 3,888,000 0.60%
34 NOVADAQ TECHNOLOGIES INC 310,000 3,934,000 0.61%
35 Allergan plc 22,750 4,054,000 0.63%
36 AGILENT TECHNOLOGIES INC 72,500 4,131,000 0.64%
37 PERRIGO CO PLC 28,500 4,280,000 0.66%
38 RITE AID CORP 914,300 4,425,000 0.68%
39 PROTHENA CORP PLC 202,500 4,487,000 0.69%
40 WELLCARE HEALTH PLANS INC 76,250 4,601,000 0.71%
41 TESARO INCORPORATED 177,500 4,778,000 0.74%
42 PUMA BIOTECHNOLOGY 20,500 4,891,000 0.76%
43 NEUROCRINE BIOSCIE COM USD0.001 315,000 4,936,000 0.76%
44 CATALENT INC 201,000 5,031,000 0.78%
45 INCYTE CORP 103,000 5,052,000 0.78%
46 OREXIGEN THERAPEUTICS INC COM 1,250,000 5,325,000 0.82%
47 STERICYCLE INC 47,000 5,478,000 0.85%
48 MWI VETERINARY SUP 39,000 5,788,000 0.90%
49 ILLUMINA INC 37,000 6,065,000 0.94%
50 Heartware International, Inc. 82,000 6,366,000 0.98%
Page 1 of 2

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001172661-14-001844, filed 2014.11.14).

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.