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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 (2016Q2)
Portfolio Summary: 106 holdings with a total value of $2,544,485,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 HORIZON PHARMA PLC 13,740,261 226,302,000 8.89%
2 NXSTAGE MED INC COM 4,505,468 97,679,000 3.84%
3 GW PHARMACEUTICALS PLC 991,800 90,819,000 3.57%
4 PORTOLA PHARMACEUTICALS INC 3,673,727 86,700,000 3.41%
5 AVEXIS INC COM 2,236,701 85,039,000 3.34%
6 Adeptus Health Inc 1,600,861 82,700,000 3.25%
7 XENOPORT INC 11,572,125 81,468,000 3.20%
8 HORIZON PHARMA INVT LTD 82,600,000 75,166,000 2.95% PRN
9 HEALTHWAYS INC 76,925,000 72,000,000 2.83% PRN
10 VANDA PHARMACEUTICALS INC COM 5,996,691 67,103,000 2.64%
11 MYLAN N V 1,339,334 57,913,000 2.28%
12 DBV TECHNOLOGIES 1,743,229 56,864,000 2.23%
13 XENCOR INC COM 2,930,486 55,650,000 2.19%
14 WALGREENS BOOTS ALLIANCE INC 611,457 50,916,000 2.00%
15 AAC HLDGS INC COM 2,149,702 49,056,000 1.93%
16 AETNA INC NEW 366,000 44,700,000 1.76%
17 AERIE PHARMACEUTICALS INC 2,520,585 44,362,000 1.74%
18 TRIB 48,000,000 43,935,000 1.73% PRN
19 FLAMEL TECHNOLOGIES SA SPONSORED ADR 4,072,809 43,742,000 1.72%
20 EDITAS MEDICINE INCORPORATED 1,709,400 41,709,000 1.64%
21 DAVITA INC 525,000 40,593,000 1.60%
22 HEARTWARE INTL INC 40,226,000 39,689,000 1.56% PRN
23 SYROS PHARMACEUTICALS INC 2,095,220 38,028,000 1.49%
24 ARRAY BIOPHARMA INC 3 06/01/2020 45,000,000 37,815,000 1.49% PRN
25 ENDOLOGIX INC 40,941,000 37,787,000 1.49% PRN
26 EHEALTH INC COM 2,640,609 37,021,000 1.45%
27 WRIGHT MED GROUP INC 40,050,000 36,749,000 1.44% PRN
28 ZELTIQ AESTHETICS INCORPORATED 1,297,000 35,447,000 1.39%
29 UNIVERSAL AMERN CORP NEW 4,323,000 32,768,000 1.29%
30 RELYPSA INC 1,670,383 30,902,000 1.21%
31 HEARTWARE INTL INC 30,271,000 29,939,000 1.18% PRN
32 ARRAY BIOPHARMA INC COM 8,361,069 29,765,000 1.17%
33 HEALTHWAYS INC 2,541,686 29,356,000 1.15%
34 GLOBAL BLOOD THERAPEUTICS IN COM 1,733,828 28,764,000 1.13%
35 GLAUKOS CORP 984,112 28,697,000 1.13%
36 HUMANA 159,500 28,691,000 1.13%
37 ACORDA THERAPEUTICS 1,029,410 26,255,000 1.03%
38 GALAPAGOS NV 458,112 25,411,000 1.00%
39 AXOGEN INC 3,381,439 23,264,000 0.91%
40 CIGNA CORPORATION 171,000 21,886,000 0.86%
41 MOLINA HEALTHCARE INC 436,000 21,756,000 0.86%
42 LANNET INC COM NEW 895,591 21,306,000 0.84%
43 RITE AID CORP 2,611,580 19,561,000 0.77%
44 COTIVITI HLDGS INC COM 900,079 19,019,000 0.75%
45 SPARK THERAPEUTICS INC 368,000 18,816,000 0.74%
46 ALNYLAM PHARMACEUTICALS INC 336,000 18,645,000 0.73%
47 FIVE PRIME THERAPEUTICS INC 448,000 18,525,000 0.73%
48 ZAFGEN INC COM 3,055,603 18,303,000 0.72%
49 Nivalis Therapeutics Inc 3,732,412 17,169,000 0.67%
50 FLUIDIGM CORP DEL 27,715,000 16,658,000 0.65% PRN
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Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001140361-16-076356, filed 2016.08.15).

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.