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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 (2015Q4)
Portfolio Summary: 133 holdings with a total value of $12,071,272,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 INCYTE CORP 19,475,316 2,112,098,000 17.50%
2 SEATTLE GENETICS INC 37,293,728 1,673,743,000 13.87%
3 ALEXION PHARMACEUTICALS 6,542,599 1,248,001,000 10.34%
4 ABBVIE INC 14,373,538 851,488,000 7.05%
5 ACADIA PHARMACEUTICALS INC 20,481,442 730,163,000 6.05%
6 Incyte Corporation 274,500,000 596,530,000 4.94% PRN
7 Incyte Corporation 259,000,000 556,688,000 4.61% PRN
8 GENOMIC HEALTH INC 13,659,264 480,806,000 3.98%
9 Anacor Pharmaceuticals Inc 4,198,520 474,307,000 3.93%
10 BIOMARIN PHARMACEUTICAL INC 4,115,083 431,096,000 3.57%
11 DYAX CORP COM CVR 8,310,017 312,623,000 2.59%
12 DBV TECHNOLOGIES S A 5,462,019 198,326,000 1.64%
13 ACORDA THERAPEUTICS INC 3,580,112 153,157,000 1.27%
14 ANACOR PHARMACEUTICALS INC 42,000,000 152,294,000 1.26% PRN
15 BIOCRYST PHARMACEUTICALS 14,217,779 146,727,000 1.22%
16 BioMarin Pharmaceutical Inc. 22,379,000 115,158,000 0.95% PRN
17 CLOVIS ONCOLOGY INC 129,300,000 110,982,000 0.92% PRN
18 BELLICUM PHARMACEUTICALS INC 4,865,647 98,627,000 0.82%
19 GILEAD SCIENCES 20,944,000 93,469,000 0.77% PRN
20 MIRATI THERAPEUTICS INC 2,955,074 93,380,000 0.77%
21 Cerus Corp 13,553,275 85,657,000 0.71%
22 AQUINOX PHARMACEUTICALS INC 6,747,332 84,207,000 0.70%
23 HERON THERAPEUTICS INC 2,907,784 77,638,000 0.64%
24 IMMUNOGEN INC 4,452,445 60,420,000 0.50%
25 ACORDA THERAPEUTICS INC 51,583,000 59,297,000 0.49% PRN
26 Spark Therapeutics, Inc. 1,262,382 57,199,000 0.47%
27 INVITAE CORP 6,554,967 53,816,000 0.45%
28 NEUROCRINE BIOSCIENCES INC 850,739 48,126,000 0.40%
29 Versartis, Inc. 3,241,783 40,166,000 0.33%
30 SANGAMO THERAPEUTICS INC 4,055,876 37,030,000 0.31%
31 HALOZYME THERAPEUTICS INC 1,931,057 33,465,000 0.28%
32 INTRA CELLULAR THERAPIES INC 609,166 32,767,000 0.27%
33 MEDIVATION INC 659,752 31,892,000 0.26%
34 PROGENICS PHARMACEUTICALS 4,350,808 26,670,000 0.22%
35 GILEAD SCIENCES INC 249,995 25,297,000 0.21%
36 TG THERAPEUTICS INC 2,003,991 23,908,000 0.20%
37 Exelexis 20,000,000 23,260,000 0.19% PRN
38 GALAPAGOS NV 369,276 23,220,000 0.19%
39 ATYR PHARMA INC 2,335,125 22,954,000 0.19%
40 ACHILLION PHARMACEUTICALS IN 2,000,000 21,580,000 0.18%
41 IDERA PHARMACEUTICALS INC 6,983,107 21,578,000 0.18%
42 Catalyst Pharmaceuticals Inc 8,275,630 20,275,000 0.17%
43 ALKERMES PLC 250,251 19,865,000 0.16%
44 XENOPORT INC 3,475,672 19,081,000 0.16%
45 NOVAVAX INC 2,195,687 18,422,000 0.15%
46 Array BioPharma Inc. 4,310,666 18,191,000 0.15%
47 INSMED INC 1,000,000 18,150,000 0.15%
48 ADVANCED ACCELERATOR APPLIC 567,454 17,744,000 0.15%
49 AEGERION PHARMACEUTICALS INC 26,517,000 17,552,000 0.15% PRN
50 DERMA SCIENCES INC COM PAR .01 3,752,390 17,148,000 0.14%
Page 1 of 3

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001144204-16-082790, filed 2016.02.16).

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.