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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 (2016Q3)
Original 13F HR (0001140361-16-086449) filed in 2016.11.14
#
Name
Shares
Value ($)
%
Options
Notes
1 GW PHARMACEUTICALS PLC 1,008,475 133,855 6.23%
2 PORTOLA PHARMACEUTICALS INC 5,639,727 128,078 5.96%
3 HORIZON PHARMA PLC 6,434,439 116,656 5.43%
4 NXSTAGE MED INC COM 4,099,175 102,438 4.76%
5 AVEXIS INC COM 2,236,701 92,174 4.29%
6 HORIZON PHARMA INVT LTD 82,600,000 80,123 3.73% PRN
7 HEALTHWAYS INC 54,382,000 79,222 3.68% PRN
8 Adeptus Health Inc 1,600,861 68,917 3.21%
9 DBV TECHNOLOGIES 1,743,229 63,332 2.95%
10 VANDA PHARMACEUTICALS INC COM 3,435,576 57,168 2.66%
11 NEVRO CORP 536,355 55,990 2.60%
12 MYLAN N V 1,423,334 54,257 2.52%
13 XENCOR INC COM 2,210,900 54,145 2.52%
14 ARRAY BIOPHARMA INC 3 06/01/2020 45,000,000 53,278 2.48% PRN
15 AERIE PHARMACEUTICALS INC 1,338,829 50,527 2.35%
16 FLAMEL TECHNOLOGIES SA SPONSORED ADR 4,072,809 50,503 2.35%
17 TRIB 48,000,000 46,775 2.18% PRN
18 WRIGHT MED GROUP INC 40,050,000 42,847 1.99% PRN
19 AETNA INC NEW 366,000 42,255 1.97%
20 ENDOLOGIX INC 40,941,000 39,231 1.82% PRN
21 AAC HLDGS INC COM 2,189,849 38,081 1.77%
22 UNIVERSAL AMERN CORP NEW 4,592,060 35,129 1.63%
23 Nivalis Therapeutics Inc 3,732,412 30,345 1.41%
24 EHEALTH INC COM 2,640,609 29,601 1.38%
25 WALGREENS BOOTS ALLIANCE INC 355,957 28,697 1.33%
26 HUMANA 159,500 28,214 1.31%
27 GALAPAGOS NV 423,112 27,358 1.27%
28 SYROS PHARMACEUTICALS INC 1,812,778 25,143 1.17%
29 Audentes Therapeutics, Inc. 1,403,653 24,999 1.16%
30 TESARO INC 242,300 24,288 1.13%
31 DAVITA INC 350,000 23,125 1.08%
32 EDITAS MEDICINE INCORPORATED 1,709,400 23,043 1.07%
33 SPARK THERAPEUTICS INC 368,000 22,102 1.03%
34 BIOCRYST PHARMACEUTICALS 4,401,846 19,412 0.90%
35 GLAUKOS CORP 503,277 18,994 0.88%
36 SELECT MED HLDGS CORP COM 1,354,662 18,288 0.85%
37 INVUITY INC 1,282,598 17,597 0.82%
38 AXOGEN INC 1,893,030 17,094 0.80%
39 FLUIDIGM CORP DEL 27,715,000 17,021 0.79% PRN
40 FIVE PRIME THERAPEUTICS INC 311,000 16,324 0.76%
41 BLUEBIRD BIO INCORPORATED 224,000 15,183 0.71%
42 CYTOMX THERAPEUTICS INC COM 943,433 14,793 0.69%
43 Proteon Therapeutics 1,570,467 14,652 0.68%
44 Foamix Pharmaceuticals Ltd. 1,307,058 12,103 0.56%
45 ARRAY BIOPHARMA INC COM 1,650,000 11,138 0.52%
46 AKARI THERAPEUTICS PLC 1,150,700 9,792 0.46%
47 ALIMERA SCIENCES INC 5,878,015 8,758 0.41%
48 MYOKARDIA INC 499,800 8,167 0.38%
49 ARDELYX INC COM 618,643 8,005 0.37%
50 ARALEZ PHARMACEUTICALS INC 1,644,583 7,976 0.37%
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