Dark
Light
System
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)
Portfolio Summary: 108 holdings with a total value of $7,867,925,000.
#
Name
Shares
Value ($)
%
Options
Notes
51 PROTHENA CORP PLC 230,142 8,817,000 0.11%
52 THRESHOLD PHARMACEUTICAL INC 1,826,358 8,693,000 0.11%
53 QLT INC 1,535,863 8,539,000 0.11%
54 DISCOVERY LABORATORIES INC N 3,652,117 7,852,000 0.10%
55 AGIOS PHARMACEUTICALS INC 199,893 7,826,000 0.10%
56 GALECTIN THERAPEUTICS INC COM 500,000 7,655,000 0.10%
57 INFINITY PHARMACEUTICALS INC 624,050 7,420,000 0.09%
58 NEUROCRINE BIOSCIE COM USD0.001 447,874 7,211,000 0.09%
59 STEMLINE THERAPEUTICS INC 338,671 6,895,000 0.09%
60 AMBIT BIOSCIENCES CORP 747,954 6,821,000 0.09%
61 BIOTA PHARMACEUTIALS INC COM 1,106,910 6,763,000 0.09%
62 ARRAY BIOPHARMA INC 1,433,797 6,739,000 0.09%
63 ZOGENIX INC 2,350,400 6,687,000 0.08%
64 IDERA PHARMACEUTICALS INCORPORATED COM NEW 1,613,076 6,581,000 0.08%
65 XENCOR INC COM 542,363 6,362,000 0.08%
66 AERIE PHARMACEUTICALS INC COM 299,356 6,343,000 0.08%
67 NOVAVAX INC COM 1,223,362 5,542,000 0.07%
68 IRONWOOD PHARMACEUTICALS INC 446,160 5,497,000 0.07%
69 REGADO BIOSCIENCES INC 400,000 5,008,000 0.06%
70 LIGAND PHARMACEUTICALS INC 73,400 4,937,000 0.06%
71 ULTRAGENYX PHARMACEUTICAL INC COM 100,000 4,889,000 0.06%
72 EPIZYME INC COM 214,012 4,873,000 0.06%
73 OSIRIS THERAPEUTICS INC NEW COM 361,530 4,747,000 0.06%
74 IGNYTA INC COM 571,000 4,739,000 0.06%
75 PORTOLA PHARMACEUTICALS INC 182,591 4,729,000 0.06%
76 CYTRX CORP 1,350,000 4,712,000 0.06%
77 BLUEBIRD BIO INC COM 198,260 4,508,000 0.06%
78 CELSUS THERAPEUTICS PLC 673,887 4,374,000 0.06%
79 RETROPHIN INC 197,178 4,194,000 0.05%
80 IONIS PHARMACEUTICAL 96,303 4,161,000 0.05%
81 BIODELIVERY SCIENCES INTL IN 421,005 3,553,000 0.05%
82 FURIEX PHARMACEUTICALS INC 40,309 3,507,000 0.04%
83 ENANTA PHARMACEUTICALS INC 80,957 3,237,000 0.04%
84 MACROGENICS INC 96,165 2,676,000 0.03%
85 LA JOLLA PHARMACEUTICAL CO 221,631 2,394,000 0.03%
86 SYNTA PHARMACEUTICALS CORP 500,000 2,155,000 0.03%
87 MAST THERAPEUTICS INC COM 3,000,000 2,040,000 0.03%
88 ORASURE TECHNOLOGIES INC 234,664 1,870,000 0.02%
89 RIGEL PHARMACEUTICAL INC 481,972 1,870,000 0.02%
90 KARYOPHARM THERAPEUTICS INC COM 59,095 1,825,000 0.02%
91 AUXILIUM PHARMACEUTICALS INC 58,544 1,591,000 0.02%
92 ACHAOGEN INC COM 100,000 1,546,000 0.02%
93 ACHILLION PHARMACEUTICALS IN 438,337 1,442,000 0.02%
94 OPHTHOTECH CORP 36,776 1,314,000 0.02%
95 CATALYST PHARMACEUTICALS INC 569,853 1,288,000 0.02%
96 ZIOPHARM ONCOLOGY INC 244,619 1,120,000 0.01%
97 Receptos Inc 23,900 1,002,000 0.01%
98 AMICUS THERAPEUTICS INC COM 481,697 997,000 0.01%
99 ACCELERON PHARMA INC 28,765 992,000 0.01%
100 TESARO INCORPORATED 31,218 920,000 0.01%
Page 2 of 3

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001144204-14-031196, filed 2014.05.15).

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.