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 (2016Q4)
Portfolio Summary: 102 holdings with a total value of $2,430,288,000.
#
Name
Shares
Value ($)
%
Options
Notes
51 ARRAY BIOPHARMA INC 1,650,000 14,504,000 0.60%
52 AAC HLDGS INC 1,975,347 14,302,000 0.59%
53 SPARK THERAPEUTICS INCORPORATED 283,000 14,122,000 0.58%
54 FOAMIX PHARMACEUTICALS LTD 1,232,844 13,685,000 0.56%
55 GLAUKOS CORP 393,228 13,488,000 0.55%
56 KITE PHARMA INCORPORATED 297,902 13,358,000 0.55%
57 WAVE LIFE SCIENCES LTD 472,124 12,346,000 0.51%
58 ADEPTUS HEALTH INC 1,600,861 12,231,000 0.50%
59 CYTOMX THERAPEUTICS INC COM 943,433 10,368,000 0.43%
60 IONIS PHARMACEUTICALS INC COM 214,095 10,240,000 0.42%
61 ACLARIS THERAPEUTICS INC COM 375,000 10,178,000 0.42%
62 INVUITY INC 1,690,498 9,720,000 0.40%
63 Nivalis Therapeutics Inc 3,732,412 8,361,000 0.34%
64 AKARI THERAPEUTICS PLC 1,150,700 8,101,000 0.33%
65 LOXO ONCOLOGY INC COM 251,000 8,061,000 0.33%
66 Oxford Immunotec Global PLC 529,197 7,911,000 0.33%
67 KERYX BIOPHARMACEUTICALS INCORPORATED 1,291,531 7,568,000 0.31%
68 ARALEZ PHARMACEUTICALS INC 1,644,583 7,253,000 0.30%
69 Axovant Sciences LTD 568,005 7,055,000 0.29%
70 FIVE PRIME THERAPEUTICS INC 138,000 6,915,000 0.28%
71 EXACT SCIENCES CORP 500,000 6,680,000 0.27%
72 ALIMERA SCIENCES INC 5,878,015 6,348,000 0.26%
73 ADVANCED ACCELERATOR APPLIC 210,000 5,620,000 0.23%
74 MYOKARDIA INC 424,800 5,501,000 0.23%
75 ARDELYX INC COM 373,643 5,306,000 0.22%
76 CAS MED SYS INC 3,200,000 5,152,000 0.21%
77 RA PHARMACEUTICALS INC COM 323,630 4,916,000 0.20%
78 ESSA Pharma 2,121,601 4,646,000 0.19%
79 STEADYMED LTD 1,756,370 4,567,000 0.19%
80 SCYNEXIS INC 1,048,000 3,343,000 0.14%
81 KEMPHARM INC 1,084,443 3,199,000 0.13%
82 NANOSTRING TECHNOLOGIES INC 139,000 3,100,000 0.13%
83 VOYAGER THERAPEUTICS INC 235,294 2,998,000 0.12%
84 GENOCEA BIOSCIENCES INC 687,257 2,831,000 0.12%
85 SANGAMO THERAPEUTICS INCORPORATED 837,963 2,556,000 0.11%
86 PSIVIDA CORP 1,492,824 2,553,000 0.11%
87 Proteon Therapeutics Inc 1,332,599 2,532,000 0.10%
88 GLOBAL BLOOD THERAPEUTICS INCORPORATED 171,428 2,477,000 0.10%
89 Catabasis Pharmaceuticals Inc 682,940 2,465,000 0.10%
90 PROTEOSTASIS THERAPEUTICS IN COM 186,000 2,280,000 0.09%
91 Agile Therapeutics, Inc. 398,000 2,269,000 0.09%
92 CELLDEX THERAPEUTICS INC NEW 632,944 2,241,000 0.09%
93 BIOSCRIP INC 1,971,228 2,050,000 0.08%
94 Sierra Oncology, Inc. 1,166,619 1,738,000 0.07%
95 Hercules Offshore Inc 76,000 1,729,000 0.07%
96 PARATEK PHARMACEUTICALS INC 100,000 1,540,000 0.06%
97 NOVELION THERAPEUTICS INC 170,454 1,435,000 0.06%
98 NEOS THERAPEUTICS INC COM 229,166 1,341,000 0.06%
99 OCERA THERAPEUTICS INC 572,893 1,203,000 0.05%
100 THRESHOLD PHARMACEUTICAL INC 2,202,160 971,000 0.04%
Page 2 of 3

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001140361-17-007402, filed 2017.02.14).

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.