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Institutional Investment Manager
DEERFIELD MANAGEMENT COMPANY, L.P.
DEERFIELD MANAGEMENT COMPANY, L.P. (CIK: 0001009258) incorporated in Delaware, located at 345 Park Avenue South, 12th Floor, New York, NY. Institutional holdings reported to the SEC.

Institutional Holdings (2014Q3)
Portfolio Summary: 131 holdings with a total value of $2,743,289,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 AUXILIUM PHARMACEUTICALS INC 6,267,382 187,081,000 6.82%
2 DENDREON CORP 222,732,000 151,473,000 5.52% PRN
3 Allergan plc 491,399 87,562,000 3.19%
4 NXSTAGE MED INC COM 6,141,094 80,633,000 2.94%
5 FLAMEL TECHNOLOGIES SA SPONSORED ADR 5,258,475 75,249,000 2.74%
6 AVALANCHE BIOTECHNOLOGIES IN 2,047,679 70,010,000 2.55%
7 HORIZON PHARMA PLC 5,520,566 67,793,000 2.47%
8 VOLCANO CORPORATION 75,500,000 65,326,000 2.38% PRN
9 AUSPEX PHARMACEUTICALS INC 2,512,160 64,487,000 2.35%
10 AMAG PHARMACEUTICALS INC 45,020,000 60,342,000 2.20% PRN
11 EHEALTH INC COM 2,264,588 54,645,000 1.99%
12 HCA HOLDINGS INC 750,000 52,890,000 1.93% Put
13 INFINITY PHARMACEUTICALS INC COM 3,882,805 52,107,000 1.90%
14 TESARO INC 50,000,000 51,960,000 1.89% PRN
15 INTEGRA LIFESCIENCES HLDGS C 47,428,000 50,673,000 1.85% PRN
16 UNIVERSAL AMERN CORP NEW 5,994,518 48,196,000 1.76%
17 AERIE PHARMACEUTICALS INC 2,324,917 48,103,000 1.75%
18 DAVITA INC 642,425 46,987,000 1.71%
19 MALLINCKRODT PUB LTD CO SHS 510,791 46,048,000 1.68%
20 BLUEBIRD BIO INCORPORATED 1,258,687 45,162,000 1.65%
21 TENET HEALTHCARE CORP 750,000 44,543,000 1.62% Put
22 ABBVIE INC 766,400 44,267,000 1.61%
23 ARRAY BIOPHARMA INC COM 12,205,673 43,574,000 1.59%
24 HUMANA 280,000 36,481,000 1.33% Call
25 Allergan plc 200,000 35,638,000 1.30% Call
26 CIGNA CORPORATION 375,000 34,009,000 1.24% Put
27 Dicerna Pharmaceuticals 2,428,569 30,916,000 1.13%
28 AETNA INC NEW 375,000 30,375,000 1.11% Put
29 ARRAY BIOPHARMA INC 3 06/01/2020 34,000,000 29,918,000 1.09% PRN
30 DYAX CORP COM CVR 2,954,684 29,901,000 1.09%
31 KITE PHARMA INCORPORATED 1,011,998 28,842,000 1.05%
32 SPECTRANETICS CORP 25,439,000 28,699,000 1.05% PRN
33 Walgreens 482,000 28,568,000 1.04%
34 INSMED INC COM PAR .01 2,080,160 27,146,000 0.99%
35 ENDOLOGIX INC 2,501,526 26,516,000 0.97%
36 GLOBUS MED INC 1,278,235 25,143,000 0.92%
37 ARENA PHARMACEUTICALS INC 5,847,999 24,503,000 0.89%
38 XENOPORT INC 4,438,882 23,881,000 0.87%
39 MCKESSON CORP 122,000 23,750,000 0.87%
40 INTERCEPT PHARMACEUTICAL 98,693 23,360,000 0.85%
41 ACCURAY INC 21,600,000 22,730,000 0.83% PRN
42 MALLINCKRODT PUB LTD CO SHS 250,000 22,538,000 0.82% Call
43 VANDA PHARMACEUTICALS INC COM 2,168,675 22,511,000 0.82%
44 TRIVASCULAR TECHNOLOGIES INC 1,532,531 22,191,000 0.81%
45 PROSENSA HLDG N V SHS USD 2,598,459 21,905,000 0.80%
46 PACIFIC BIOSCIENCES CALIF IN 4,399,332 21,601,000 0.79%
47 LOXO ONCOLOGY INC COM 1,591,546 20,897,000 0.76%
48 ENDOLOGIX INC 21,240,000 18,932,000 0.69% PRN
49 OVASCIENCE INC COM 1,135,173 18,844,000 0.69%
50 GLAXOSMITHKLINE PLC 400,000 18,388,000 0.67%
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Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001140361-14-042282, 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.