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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 (2015Q1)
Portfolio Summary: 124 holdings with a total value of $3,087,400,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 IMRIS INC 147,076 141,000 0.00%
2 Esperion Therapeutics Inc 2,500 232,000 0.01%
3 ONCOTHYREON INC COM N/C EFF 6/ 143,200 233,000 0.01%
4 PLASMATECH BIOPHARMACEUTICALS 375,000 319,000 0.01%
5 CELGENE CORP 3,500 403,000 0.01%
6 RITE AID CORP 52,764 459,000 0.01%
7 HMS HOLDINGS CORPORATION 29,900 462,000 0.01%
8 MAZOR ROBOTICS LTD 41,861 470,000 0.02%
9 AETERNA ZENTARIS INC 898,574 482,000 0.02%
10 NEKTAR THERAPEUTICS COM 45,600 502,000 0.02%
11 MYLAN N V 10,000 594,000 0.02%
12 ABBOTT LABS 13,000 602,000 0.02%
13 MIRATI THERAPEUTICS INC COM 32,912 965,000 0.03%
14 Agile Therapeutics, Inc. 105,000 973,000 0.03%
15 CORSICANTO LTD 1,000,000 1,044,000 0.03% PRN
16 ALKERMES PLC 17,500 1,067,000 0.03%
17 PLASMATECH BIOPHARMACEUTICAL 349,908 1,099,000 0.04%
18 ILLUMINA INC 6,400 1,188,000 0.04%
19 PARNELL PHARMACEUTICALS HOLDINGS LTD 253,592 1,245,000 0.04%
20 MEI PHARMA INC 802,568 1,437,000 0.05%
21 ACADIA PHARMACEUTICALS INC COM 49,400 1,610,000 0.05%
22 BOVIE MEDICAL CORP COM 700,000 1,673,000 0.05%
23 IMMUNOMEDICS INCORPORATED 500,000 1,915,000 0.06% Call
24 KINDRED BIOSCIENCES INC 279,204 1,994,000 0.06%
25 PALATIN TECHNOLOGIES INC COM 2,000,000 2,040,000 0.07%
26 INVITAE CORP 166,666 2,793,000 0.09%
27 ST JUDE MED INC 50,370 3,294,000 0.11%
28 Ascendis Pharma 200,000 3,470,000 0.11%
29 SUCAMPO PHARMACEUTICALS INCORPORATED CLASS A 225,000 3,501,000 0.11%
30 DERMIRA INC COM 231,467 3,553,000 0.12%
31 Exelexis 4,985,000 3,762,000 0.12% PRN
32 RETROPHIN INC 158,223 3,791,000 0.12%
33 SCYNEXIS INC 492,781 4,090,000 0.13%
34 CAS MED SYS INC 3,200,000 4,272,000 0.14%
35 CROSS CTRY HEALTHCARE INC COM 366,724 4,349,000 0.14%
36 DISCOVERY LABORATORIES INC N 3,659,700 4,355,000 0.14%
37 CAREDX INC 804,000 4,458,000 0.14%
38 TRILLIUM THERAPEUTICS INC 226,064 4,573,000 0.15%
39 ProQR Therapeutics NV 209,398 4,582,000 0.15%
40 CARA THERAPEUTICS INC 473,588 4,760,000 0.15%
41 LUMENIS LTD 434,566 5,202,000 0.17%
42 CELLECTIS S A 150,506 5,204,000 0.17%
43 BioTelemetry Inc 644,300 5,702,000 0.18%
44 ZS PHARMA INC 147,385 6,202,000 0.20%
45 VERSARTIS INC 339,703 6,240,000 0.20%
46 FOAMIX PHARMACEUTICALS LTD 679,627 6,287,000 0.20%
47 STREAMLINE HEALTH SOLUTIONS COM 1,822,759 6,471,000 0.21%
48 AMPHASTAR PHARMACEUTICALS IN COM 448,532 6,710,000 0.22%
49 Tracon Pharmaceuticals Inc 485,000 6,809,000 0.22%
50 DBV TECHNOLOGIES S A 298,121 6,964,000 0.23%
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Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001140361-15-020245, filed 2015.05.15). and New Holdings filing (0001140361-15-032272, filed 2015.08.14).

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.