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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 GILEAD SCIENCES INC 363,000 38,641,000 5.98%
2 MEDTRONIC INC 527,500 32,679,000 5.06%
3 ABBVIE INC 525,000 30,324,000 4.69%
4 MERCK & CO INC 475,000 28,158,000 4.36%
5 MCKESSON CORP 128,500 25,015,000 3.87%
6 HCA HOLDINGS INC 320,250 22,584,000 3.49%
7 ALLERGAN PLC 87,750 21,172,000 3.28%
8 AMGEN INC 145,000 20,367,000 3.15%
9 BIOGEN INC 61,350 20,295,000 3.14%
10 CELGENE CORP 166,000 15,733,000 2.43%
11 ALEXION PHARMACEUTIC 89,750 14,882,000 2.30%
12 THORATEC LABS CORP 521,000 13,926,000 2.15%
13 THERMO FISHER SCIENTIFIC INC 108,500 13,204,000 2.04%
14 AVANIR PHARMACEUTICALS INC CL 1,100,000 13,112,000 2.03%
15 COOPER COS INC 68,750 10,708,000 1.66%
16 FLAMEL TECHNOLOGIES SA SPONSORED ADR 735,000 10,518,000 1.63%
17 HUMANA 79,500 10,358,000 1.60%
18 CVS HEALTH CORP 130,000 10,347,000 1.60%
19 PHARMACYCLICS INC 85,250 10,011,000 1.55%
20 ENVISION HEALTHCARE HLDGS INC 285,500 9,901,000 1.53%
21 PACIRA BIOSCIENCES INC 102,000 9,886,000 1.53%
22 ACADIA HEALTHCARE COMPANY IN 203,000 9,846,000 1.52%
23 ATHENA HEALTH INC. 67,750 8,922,000 1.38%
24 RTI SURGICAL HOLDINGS INC COM 1,859,600 8,889,000 1.38%
25 HILL ROM HLDGS INC 213,000 8,825,000 1.37%
26 TEAM HEALTH HOLDINGS INCORPORATED 150,750 8,742,000 1.35%
27 AETNA INC NEW 106,000 8,586,000 1.33%
28 INTUITIVE SURGICAL INC 18,500 8,544,000 1.32%
29 VALEANT PHARMACEUTICALS INTL 56,000 7,347,000 1.14%
30 CARDINAL HEALTH INC 92,250 6,911,000 1.07%
31 CIGNA CORPORATION 75,000 6,802,000 1.05%
32 DANAHER CORP DEL 85,000 6,458,000 1.00%
33 VERTEX PHARMACEUT 57,500 6,458,000 1.00%
34 Heartware International, Inc. 82,000 6,366,000 0.98%
35 ILLUMINA INC 37,000 6,065,000 0.94%
36 MWI VETERINARY SUP 39,000 5,788,000 0.90%
37 STERICYCLE 47,000 5,478,000 0.85%
38 Orexigen Therapeutics, Inc. 1,250,000 5,325,000 0.82%
39 INCYTE 103,000 5,052,000 0.78%
40 CATALENT INC 201,000 5,031,000 0.78%
41 NEUROCRINE BIOSCIE COM USD0.001 315,000 4,936,000 0.76%
42 PUMA BIOTECHNOLOGY 20,500 4,891,000 0.76%
43 TESARO INC 177,500 4,778,000 0.74%
44 WELLCARE HEALTH PLANS INC COM 76,250 4,601,000 0.71%
45 PROTHENA CORP PLC 202,500 4,487,000 0.69%
46 RITE AID CORP 914,300 4,425,000 0.68%
47 PERRIGO CO PLC 28,500 4,280,000 0.66%
48 AGILENT TECHNOLOGIES INC 72,500 4,131,000 0.64%
49 Allergan plc 22,750 4,054,000 0.63%
50 NOVADAQ TECHNOLOGIES INC 310,000 3,934,000 0.61%
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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.