Dark
Light
System
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 ORTHOFIX INTL N V 591,431 17,832 0.73%
52 ZOGENIX INC 6,174,809 17,567 0.72%
53 MOLINA HEALTHCARE INC 451,391 16,954 0.69%
54 OVASCIENCE INC COM 1,672,549 14,953 0.61%
55 ARATANA THERAPEUTICS INC 788,904 14,642 0.60%
56 ZOETIS INC 500,000 14,470 0.59% Call
57 EHEALTH INC COM 271,000 13,767 0.56%
58 MEI PHARMA INC 1,164,575 12,962 0.53%
59 Allergan plc 100,000 12,410 0.51% Call
60 GENOCEA BIOSCIENCES INC 659,983 12,005 0.49%
61 AERIE PHARMACEUTICALS INC 565,180 11,976 0.49%
62 ANI PHARMACEUTICALS INC 371,572 11,649 0.48%
63 Foundation Medicine 342,921 11,100 0.45%
64 IMMUNOMEDICS INCORPORATED 2,628,972 11,068 0.45%
65 AMAG PHARMACEUTICALS INC 534,930 10,351 0.42%
66 ALIMERA SCIENCES INC 1,311,290 10,346 0.42%
67 SPECTRUM PHARMACEUTICALS INC COM 1,265,375 9,921 0.41%
68 BIOCRYST PHARMACEUTICALS 907,920 9,606 0.39%
69 ZELTIQ AESTHETICS INC 483,520 9,482 0.39%
70 INTEGRA LIFESCIENCES HLDGS CP COM NEW 206,128 9,480 0.39%
71 BLUEBIRD BIO INC 414,474 9,425 0.38%
72 ENDOLOGIX INC 683,458 8,796 0.36%
73 CONCERT PHARMACEUTICALS INCORPORATED 617,649 8,307 0.34%
74 PTC THERAPEUTICS INC 317,530 8,300 0.34%
75 VANDA PHARMACEUTICALS INC COM 501,709 8,153 0.33%
76 NANOSTRING TECHNOLOGIES INC 391,105 8,076 0.33%
77 CAPITAL SR LIVING CORP 308,088 8,007 0.33%
78 DISCOVERY LABORATORIES INC N 3,659,700 7,868 0.32%
79 CENTENE CORP DEL 124,795 7,768 0.32%
80 ARENA PHARMACEUTICALS INC 1,216,579 7,664 0.31%
81 KALOBIOS PHARMACEUTICALS INC 2,786,783 7,552 0.31%
82 CAS MED SYS INC 3,200,000 6,944 0.28%
83 AUXILIUM PHARMACEUTICALS INC 250,000 6,795 0.28% Put
84 AMEDISYS INC COM 439,000 6,537 0.27%
85 BAXTER INTL INC 85,000 6,254 0.26%
86 ALPHATEC HOLDINGS INC 3,982,738 5,974 0.24%
87 INOGEN INC COM 357,269 5,899 0.24%
88 STREAMLINE HEALTH SOLUTIONS COM 1,140,100 5,735 0.23%
89 ANTHERA PHARMACEUTICALS I 1,691,857 5,668 0.23%
90 VERTEX PHARMACEUTICALS INC 78,500 5,552 0.23%
91 UNIQURE NV 350,000 5,453 0.22%
92 XOMA CORP DEL 1,000,000 5,210 0.21% Call
93 CANCER GENETICS 318,012 4,799 0.20%
94 LIPOSCIENCE INC 1,382,350 4,410 0.18%
95 NANOSPHERE INC 2,000,000 4,300 0.18%
96 MANNKIND CORP. 1,000,000 4,020 0.16% Put
97 RIGEL PHARMACEUTICALS INC 1,027,443 3,986 0.16%
98 DERMA SCIENCES ORD 300,000 3,804 0.16%
99 REVANCE THERAPEUTICS INC COM 116,689 3,676 0.15%
100 EAGLE PHARMACEUTICALS INC 284,653 3,629 0.15%
Page 2 of 3