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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 (2016Q4)
Original 13F HR (0001140361-17-007402) filed in 2017.02.14
#
Name
Shares
Value ($)
%
Options
Notes
1 HORIZON PHARMA PLC 8,956,988 144,924 5.96%
2 NXSTAGE MED INC COM 4,258,196 111,607 4.59%
3 AVEXIS INC COM 2,236,701 106,758 4.39%
4 PORTOLA PHARMACEUTICALS INC 4,654,447 104,446 4.30%
5 GW PHARMACEUTICALS PLC 928,192 103,725 4.27%
6 AERIE PHARMACEUTICALS INC COM 1,838,829 69,600 2.86%
7 MYLAN N V 1,766,378 67,387 2.77%
8 DBV TECHNOLOGIES S A 1,743,229 61,240 2.52%
9 VANDA PHARMACEUTICALS INC COM 3,424,676 54,624 2.25%
10 NEVRO CORP COM 751,298 54,589 2.25%
11 XENCOR INC COM 2,020,000 53,166 2.19%
12 BLUEPRINT MEDICINES CORP COM 1,842,415 51,680 2.13%
13 ANTHEM INC 318,000 45,719 1.88%
14 LANNET INC COM NEW 2,007,551 44,266 1.82%
15 FLAMEL TECHNOLOGIES SA SPONSORED ADR 4,072,809 42,316 1.74%
16 HUMANA INC 198,000 40,398 1.66%
17 UNIVERSAL AMERN CORP NEW 3,774,090 37,552 1.55%
18 CENTENE CORP DEL 603,643 34,112 1.40%
19 AETNA INC NEW 242,000 30,010 1.23%
20 WALGREENS BOOTS ALLIANCE INC 355,957 29,459 1.21%
21 EHEALTH INC COM 2,640,609 28,122 1.16%
22 EDITAS MEDICINE INCORPORATED 1,709,400 27,744 1.14%
23 GALAPAGOS NV 423,112 27,160 1.12%
24 GLOBUS MED INC 1,036,000 25,703 1.06%
25 Audentes Therapeutics, Inc. 1,403,653 25,645 1.06%
26 SYROS PHARMACEUTICALS INC 1,812,778 22,043 0.91%
27 Ascendis Pharma 1,050,000 21,252 0.87%
28 BIOCRYST PHARMACEUTICALS 3,237,734 20,495 0.84%
29 MALLINCKRODT PUB LTD CO 407,000 20,277 0.83%
30 EPIZYME INC COM 1,601,049 19,373 0.80%
31 BLUEBIRD BIO INC COM 302,027 18,635 0.77%
32 MYOVANT SCIENCES LTD 1,496,675 18,619 0.77%
33 MYLAN N V 450,000 17,168 0.71% Call
34 SOCIETAL CDMO INC 2,075,000 16,725 0.69%
35 AXOGEN INC 1,838,225 16,544 0.68%
36 ZIMMER BIOMET HLDGS INC 150,000 15,480 0.64%
37 TESARO INCORPORATED 112,200 15,089 0.62%
38 SELECTA BIOSCIENCES INC 853,205 14,632 0.60%
39 ARRAY BIOPHARMA INC 1,650,000 14,504 0.60%
40 AAC HLDGS INC 1,975,347 14,302 0.59%
41 SPARK THERAPEUTICS INCORPORATED 283,000 14,122 0.58%
42 FOAMIX PHARMACEUTICALS LTD 1,232,844 13,685 0.56%
43 GLAUKOS CORP 393,228 13,488 0.55%
44 KITE PHARMA INCORPORATED 297,902 13,358 0.55%
45 WAVE LIFE SCIENCES LTD 472,124 12,346 0.51%
46 ADEPTUS HEALTH INC 1,600,861 12,231 0.50%
47 CYTOMX THERAPEUTICS INC COM 943,433 10,368 0.43%
48 IONIS PHARMACEUTICALS INC COM 214,095 10,240 0.42%
49 ACLARIS THERAPEUTICS INC COM 375,000 10,178 0.42%
50 INVUITY INC 1,690,498 9,720 0.40%
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