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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 (2016Q1)
Original 13F HR (0001140361-16-065661) filed in 2016.05.16
#
Name
Shares
Value ($)
%
Options
Notes
1 HORIZON PHARMA PLC SHS 13,740,261 227,676 9.69%
2 MYLAN N V 1,832,535 84,938 3.62%
3 NXSTAGE MED INC COM 5,506,028 82,535 3.51%
4 GLAXOSMITHKLINE PLC 1,675,385 67,937 2.89%
5 AETNA INC NEW 591,465 66,451 2.83%
6 PORTOLA PHARMACEUTICALS INC 3,089,785 63,032 2.68%
7 AVEXIS INC COM 2,236,701 60,928 2.59%
8 DAVITA INC 822,000 60,318 2.57%
9 EDITAS MEDICINE INC 1,709,400 59,043 2.51%
10 ADEPTUS HEALTH INC CL A 956,533 53,126 2.26%
11 XENOPORT INC 11,572,125 52,190 2.22%
12 VANDA PHARMACEUTICALS INC COM 5,996,691 50,132 2.13%
13 GW PHARMACEUTICALS PLC 674,373 48,656 2.07%
14 XENCOR INC COM 3,467,512 46,534 1.98%
15 AAC HLDGS INC 2,294,936 45,417 1.93%
16 FLAMEL TECHNOLOGIES SA SPONSORED ADR 4,072,809 44,964 1.91%
17 WALGREENS BOOTS ALLIANCE INC 511,457 43,085 1.83%
18 UNIVERSAL AMERN CORP NEW 5,285,500 37,738 1.61%
19 SAGE THERAPEUTICS INC 1,113,654 35,704 1.52%
20 AERIE PHARMACEUTICALS INC 2,632,482 32,011 1.36%
21 EHEALTH INC COM 3,264,588 30,654 1.31%
22 ZELTIQ AESTHETICS INC 1,104,417 29,996 1.28%
23 ARRAY BIOPHARMA INC 9,529,361 28,112 1.20%
24 FIVE PRIME THERAPEUTICS INC 680,000 27,628 1.18%
25 MCKESSON CORP 175,000 27,519 1.17%
26 Heartware International, Inc. 870,634 27,355 1.16%
27 ACORDA THERAPEUTICS INC 1,029,410 27,228 1.16%
28 DBV TECHNOLOGIES S A 817,806 26,620 1.13%
29 RELYPSA INC 1,873,471 25,386 1.08%
30 Hercules Offshore Inc 2,475,387 24,977 1.06%
31 INFINITY PHARMACEUTICALS INC 4,398,862 23,182 0.99%
32 KEMPHARM INC 1,420,497 20,597 0.88%
33 ZAFGEN INC COM 3,055,603 20,411 0.87%
34 Sierra Oncology, Inc. 3,001,302 20,229 0.86%
35 RITE AID CORP 2,393,072 19,504 0.83%
36 GLOBAL BLOOD THERAPEUTICS INCORPORATED 1,193,811 18,934 0.81%
37 AXOGEN INC 3,381,439 18,125 0.77%
38 AKARI THERAPEUTICS PLC 1,150,700 16,110 0.69%
39 Nivalis Therapeutics Inc 3,732,412 15,564 0.66%
40 ANTHEM INC 102,000 14,177 0.60%
41 GALAPAGOS NV 327,626 13,701 0.58%
42 NOVAVAX INC 2,456,261 12,674 0.54%
43 REGENXBIO INC COM 1,169,042 12,626 0.54%
44 IMPRIVATA INC 983,366 12,420 0.53%
45 CYTOMX THERAPEUTICS INC COM 943,433 12,170 0.52%
46 ALIMERA SCIENCES INC 5,878,015 10,287 0.44%
47 PROTEON THERAPEUTICS INC 1,265,343 9,794 0.42%
48 MACROGENICS INC 517,920 9,711 0.41%
49 INVUITY INC 1,327,009 9,581 0.41%
50 ENDOCHOICE HLDGS INC 1,823,309 9,499 0.40%
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