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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 (2015Q1)
Portfolio Summary: 105 holdings with a total value of $1,069,136,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 MEDTRONIC PLC 572,300 44,634,000 4.17%
2 ABBVIE INC 600,000 35,124,000 3.29%
3 MCKESSON CORP 149,000 33,704,000 3.15%
4 ALLERGAN PLC 112,500 33,482,000 3.13%
5 HCA HOLDINGS INC 422,500 31,785,000 2.97%
6 VALEANT PHARMACEUTICALS INTL 155,000 30,786,000 2.88%
7 PFIZER INC 760,000 26,440,000 2.47%
8 AMGEN INC 164,000 26,215,000 2.45%
9 ACADIA HEALTHCARE COMPANY IN 362,500 25,955,000 2.43%
10 GILEAD SCIENCES INC 255,000 25,023,000 2.34%
11 PHARMACYCLICS INC 88,000 22,524,000 2.11%
12 CELGENE CORP 194,500 22,422,000 2.10%
13 ENVISION HEALTHCARE HLDGS INC 570,000 21,860,000 2.04%
14 THORATEC LABS CORP 515,000 21,573,000 2.02%
15 HUMANA 107,500 19,137,000 1.79%
16 ALEXION PHARMACEUTIC 108,250 18,760,000 1.75%
17 TEAM HEALTH HOLDINGS INCORPORATED 311,000 18,197,000 1.70%
18 WRIGHT MEDICAL GROUP N.V. 660,000 17,305,000 1.62%
19 CVS HEALTH CORP 164,000 16,926,000 1.58%
20 RETROPHIN INC COM 700,000 16,772,000 1.57%
21 LILLY ELI & CO 230,000 16,710,000 1.56%
22 AETNA INC NEW 156,500 16,672,000 1.56%
23 RADIUS HEALTH 400,000 16,464,000 1.54%
24 CIGNA CORPORATION 122,000 15,792,000 1.48%
25 BIOGEN INC 37,000 15,623,000 1.46%
26 NEUROCRINE BIOSCIE COM USD0.001 375,000 14,891,000 1.39%
27 THERMO FISHER SCIENTIFIC INC 100,000 13,434,000 1.26%
28 Orexigen Therapeutics, Inc. 1,550,000 12,137,000 1.14%
29 TESARO INC 210,000 12,054,000 1.13%
30 INTUITIVE SURGICAL INC 22,500 11,363,000 1.06%
31 INOVALON HLDGS INC COM CL A 375,000 11,329,000 1.06%
32 Receptos Inc 65,000 10,718,000 1.00%
33 INCYTE 113,000 10,358,000 0.97%
34 STERICYCLE 73,500 10,322,000 0.97%
35 INTERCEPT PHARMACEUTICAL 36,000 10,153,000 0.95%
36 COOPER COS INC 54,000 10,121,000 0.95%
37 HealthSouth Corp 220,000 9,759,000 0.91%
38 LABORATORY CORP AMER HLDGS 75,000 9,457,000 0.88%
39 Heartware International, Inc. 105,000 9,216,000 0.86%
40 RTI SURGICAL HOLDINGS INC COM 1,860,000 9,188,000 0.86%
41 PROTHENA CORP PLC 237,500 9,058,000 0.85%
42 DANAHER CORP DEL 105,500 8,957,000 0.84%
43 MEDICINES CO 300,000 8,406,000 0.79%
44 FLAMEL TECHNOLOGIES SA SPONSORED ADR 460,000 8,271,000 0.77%
45 PRA HEALTH SCIENCES INC 285,000 8,219,000 0.77%
46 VERTEX PHARMACEUT 68,000 8,022,000 0.75%
47 SELECT SECTOR SPDR TR 110,000 7,975,000 0.75%
48 PERRIGO CO PLC 47,000 7,781,000 0.73%
49 NOVADAQ TECHNOLOGIES INC 475,000 7,714,000 0.72%
50 INSMED INC COM PAR .01 365,000 7,592,000 0.71%
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Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001172661-15-001184, filed 2015.05.15).

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.