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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 (2014Q1)
Original 13F HR (0001140361-14-021676) filed in 2014.05.15
#
Name
Shares
Value ($)
%
Options
Notes
51 ALIMERA SCIENCES INC 1,311,290 10,346 0.42%
52 SPECTRUM PHARMACEUTICALS INC COM 1,265,375 9,921 0.41%
53 BIOCRYST PHARMACEUTICALS 907,920 9,606 0.39%
54 ZELTIQ AESTHETICS INC 483,520 9,482 0.39%
55 INTEGRA LIFESCIENCES HLDGS CP COM NEW 206,128 9,480 0.39%
56 BLUEBIRD BIO INC 414,474 9,425 0.38%
57 ENDOLOGIX INC 683,458 8,796 0.36%
58 CONCERT PHARMACEUTICALS INCORPORATED 617,649 8,307 0.34%
59 PTC THERAPEUTICS INC 317,530 8,300 0.34%
60 VANDA PHARMACEUTICALS INC COM 501,709 8,153 0.33%
61 NANOSTRING TECHNOLOGIES INC 391,105 8,076 0.33%
62 CAPITAL SR LIVING CORP 308,088 8,007 0.33%
63 DISCOVERY LABORATORIES INC N 3,659,700 7,868 0.32%
64 CENTENE CORP DEL 124,795 7,768 0.32%
65 ARENA PHARMACEUTICALS INC 1,216,579 7,664 0.31%
66 KALOBIOS PHARMACEUTICALS INC 2,786,783 7,552 0.31%
67 CAS MED SYS INC 3,200,000 6,944 0.28%
68 AUXILIUM PHARMACEUTICALS INC 250,000 6,795 0.28% Put
69 AMEDISYS INC COM 439,000 6,537 0.27%
70 BAXTER INTL INC 85,000 6,254 0.26%
71 ALPHATEC HOLDINGS INC 3,982,738 5,974 0.24%
72 INOGEN INC COM 357,269 5,899 0.24%
73 STREAMLINE HEALTH SOLUTIONS COM 1,140,100 5,735 0.23%
74 ANTHERA PHARMACEUTICALS I 1,691,857 5,668 0.23%
75 VERTEX PHARMACEUTICALS INC 78,500 5,552 0.23%
76 UNIQURE NV 350,000 5,453 0.22%
77 XOMA CORP DEL 1,000,000 5,210 0.21% Call
78 CANCER GENETICS 318,012 4,799 0.20%
79 LIPOSCIENCE INC 1,382,350 4,410 0.18%
80 NANOSPHERE INC 2,000,000 4,300 0.18%
81 MANNKIND CORP. 1,000,000 4,020 0.16% Put
82 RIGEL PHARMACEUTICALS INC 1,027,443 3,986 0.16%
83 DERMA SCIENCES ORD 300,000 3,804 0.16%
84 REVANCE THERAPEUTICS INC COM 116,689 3,676 0.15%
85 EAGLE PHARMACEUTICALS INC 284,653 3,629 0.15%
86 BIOGEN INC 11,750 3,594 0.15%
87 INTRA-CELLULAR THERAPIES INC 171,437 3,117 0.13%
88 OXYGEN BIOTHERAPEUTICS INC 550,000 3,053 0.12%
89 Sunesis Pharmaceuticals I 455,741 3,012 0.12%
90 TARGACEPT INC 617,000 2,931 0.12%
91 OCERA THERAPEUTICS INC 261,119 2,755 0.11%
92 ILLUMINA INC 17,697 2,631 0.11%
93 TONIX PHARMACEUTICALS HOLDING 244,524 2,545 0.10%
94 PALATIN TECHNOLOGIES INC 2,000,000 2,460 0.10%
95 THERAPEUTICSMD INC 376,049 2,373 0.10%
96 MERGE HEALTHCARE INC 959,580 2,341 0.10%
97 EXELIXIS INC 500,000 1,770 0.07% Call
98 REGENERON PHARMACEUTICALS 4,799 1,441 0.06%
99 EXELIXIS INC 400,000 1,416 0.06%
100 AGILENT TECHNOLOGIES INC 25,000 1,398 0.06%
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