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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 ZS PHARMA INC 155,000 10,177 0.83%
2 XENOPORT INC 555,000 1,926 0.16%
3 Wuxi Pharmatech Inc ADR 175,000 7,562 0.61%
4 WRIGHT MEDICAL GROUP N.V. 660,000 13,457 1.09%
5 VERTEX PHARMACEUTICALS INC 72,250 7,524 0.61%
6 VALEANT PHARMACEUTICALS INTL 112,500 20,068 1.63%
7 ULTRAGENYX PHARMACEUTICAL INC COM 107,000 10,305 0.84%
8 Theravance Biopharma Inc 602,500 6,621 0.54%
9 THORATEC LABS CORP 120,000 7,591 0.62%
10 THERMO FISHER SCIENTIFIC INC 100,000 12,228 0.99%
11 THERAPEUTICSMD INC 775,000 4,542 0.37%
12 TEVA PHARMACEUTICAL INDS LTD 325,000 18,350 1.49%
13 TESARO INCORPORATED 226,000 9,063 0.74%
14 TEAM HEALTH HOLDINGS INC 315,000 17,019 1.38%
15 TANDEM DIABETES CARE INC COM 542,500 4,779 0.39%
16 ST JUDE MED INC 530,000 33,438 2.71%
17 SPARK THERAPEUTICS INCORPORATED 500,000 20,865 1.69%
18 SPARK THERAPEUTICS INCORPORATED 45,700 1,907 0.15% Put
19 SERES THERAPEUTICS INC 180,000 5,335 0.43%
20 SCYNEXIS INC 470,000 3,422 0.28%
21 RTI SURGICAL HOLDINGS INC COM 1,860,000 10,565 0.86%
22 ROKA BIOSCIENCE INC 250,000 485 0.04%
23 RETROPHIN INC 683,900 13,856 1.12%
24 RELYPSA INC 252,000 4,665 0.38%
25 REGENERON PHARMACEUTICALS 11,000 5,117 0.42%
26 RAPTOR PHARMACEUTICAL CORP 305,000 1,845 0.15%
27 RADIUS HEALTH INCORPORATED COM NEW 560,000 38,814 3.15%
28 PUMA BIOTECHNOLOGY 15,900 1,198 0.10%
29 PTC THERAPEUTICS INC 42,960 1,147 0.09%
30 PROTHENA CORP PLC 248,000 11,244 0.91%
31 PRA HEALTH SCIENCES INC 253,000 9,824 0.80%
32 PFIZER INC 760,000 23,872 1.94%
33 PENUMBRA INC COM 195,000 7,820 0.63%
34 PACIRA PHARMACEUTICALS INC 168,000 6,905 0.56%
35 Otonomy Inc 320,800 5,713 0.46%
36 OREXIGEN THERAPEUTICS INC COM 1,650,000 3,482 0.28%
37 Nivalis Therapeutics Inc 489,000 6,342 0.51%
38 NOVAVAX INC COM 715,000 5,055 0.41%
39 NOVADAQ TECHNOLOGIES INC 540,000 5,632 0.46%
40 NEUROCRINE BIOSCIE COM USD0.001 374,000 14,881 1.21%
41 MEDNAX INC 125,000 9,599 0.78%
42 MEDICINES CO 595,000 22,586 1.83%
43 MCKESSON CORP 70,000 12,952 1.05%
44 MACROGENICS INC 218,000 4,670 0.38%
45 Life Technologies Corp 388,996 3,991 0.32%
46 LILLY ELI & CO 232,500 19,458 1.58%
47 KITE PHARMA INCORPORATED 91,500 5,095 0.41%
48 KINDRED BIOSCIENCES INC 275,000 1,430 0.12%
49 JUNO THERAPEUTICS INC COM 197,001 8,016 0.65%
50 JAZZ PHARMACEUTICALS PLC 51,500 6,840 0.56%
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