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Institutional Investment Manager
BAKER BROS. ADVISORS LP
BAKER BROS. ADVISORS LP (CIK: 0001263508) incorporated in Delaware, located at 860 Washington Street, New York, NY. Institutional holdings reported to the SEC.

Institutional Holdings (2014Q1)
Original 13F HR (0001144204-14-031196) filed in 2014.05.15
#
Name
Shares
Value ($)
%
Options
Notes
1 ZOGENIX INC 2,350,400 6,687 0.08%
2 ZIOPHARM ONCOLOGY INC 244,619 1,120 0.01%
3 XOMA CORP DEL 23,057,572 120,130 1.53%
4 XENOPORT INC 4,034,112 20,856 0.27%
5 XENCOR INC COM 542,363 6,362 0.08%
6 VENTRUS BIOSCIENCES INC 417,690 535 0.01%
7 VANDA PHARMACEUTICALS INC COM 4,445,696 72,243 0.92%
8 UNIQURE NV 30,672 477 0.01%
9 ULTRAGENYX PHARMACEUTICAL INC COM 100,000 4,889 0.06%
10 Tekmira Pharmaceuticals Corp. 484,156 10,405 0.13%
11 THRESHOLD PHARMACEUTICAL INC 1,826,358 8,693 0.11%
12 TG THERAPEUTICS INC COM 2,160,965 14,911 0.19%
13 TESARO INCORPORATED 31,218 920 0.01%
14 Salix Pharmaceuticals Inc 05/15/2015 2.750% 219,440,000 491,957 6.25% PRN
15 SYNTA PHARMACEUTICALS CORP 500,000 2,155 0.03%
16 SYNERGY PHARMACEUTICALS DEL 1,758,271 9,336 0.12%
17 SYNAGEVA BIOPHARMA CORP 10,648,182 883,480 11.23%
18 STEMLINE THERAPEUTICS INC 338,671 6,895 0.09%
19 SEATTLE GENETICS INC 20,739,426 944,887 12.01%
20 SANGAMO THERAPEUTICS INCORPORATED 522,764 9,452 0.12%
21 SALIX PHARMACEUTICALS INC 15,000,000 25,289 0.32% PRN
22 SALIX PHARMACEUTICALS INC 3,621 375 0.00%
23 Receptos Inc 23,900 1,002 0.01%
24 RIGEL PHARMACEUTICAL INC 481,972 1,870 0.02%
25 RETROPHIN INC 197,178 4,194 0.05%
26 REPROS THERAPEUTICS INC 2,778,654 49,293 0.63%
27 REGADO BIOSCIENCES INC 400,000 5,008 0.06%
28 Questcor 717,745 46,603 0.59%
29 QLT INC 1,535,863 8,539 0.11%
30 Progenics Pharmaceuticals Inc 4,449,797 18,200 0.23%
31 PROTHENA CORP PLC 230,142 8,817 0.11%
32 PORTOLA PHARMACEUTICALS INC 182,591 4,729 0.06%
33 PHARMACYCLICS INC 8,737,888 875,711 11.13%
34 OSIRIS THERAPEUTICS INC NEW COM 361,530 4,747 0.06%
35 ORASURE TECHNOLOGIES INC 234,664 1,870 0.02%
36 OPHTHOTECH CORP 36,776 1,314 0.02%
37 OMEROS CORP 753,804 9,098 0.12%
38 NOVAVAX INC COM 1,223,362 5,542 0.07%
39 NEUROCRINE BIOSCIE COM USD0.001 447,874 7,211 0.09%
40 Medivation Inc 04/01/2017 2.625% 39,500,000 56,288 0.72% PRN
41 MIRATI THERAPEUTICS INC COM 2,380,074 45,388 0.58%
42 MAST THERAPEUTICS INC COM 3,000,000 2,040 0.03%
43 MACROGENICS INC 96,165 2,676 0.03%
44 LIGAND PHARMACEUTICALS INC 73,400 4,937 0.06%
45 LA JOLLA PHARMACEUTICAL CO 221,631 2,394 0.03%
46 KYTHERA BIOPHARMACEUTICALS I 311,255 12,375 0.16%
47 KARYOPHARM THERAPEUTICS INC COM 59,095 1,825 0.02%
48 Intermune 16,860,000 30,590 0.39% PRN
49 Intermune 41,000,000 107,856 1.37% PRN
50 Incyte Corporation 274,500,000 350,417 4.45% PRN
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