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Institutional Investment Manager
EcoR1 Capital, LLC
EcoR1 Capital, LLC (CIK: 0001587114) incorporated in Delaware, located at 357 Tehama Street #3, San Francisco, CA. Institutional holdings reported to the SEC.

Institutional Holdings (2015Q3)
Portfolio Summary: 25 holdings with a total value of $219,698,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 FIBROGEN INC COM 1,230,391 26,970,000 12.28%
2 Atara Biotherapeutics Inc 803,458 25,261,000 11.50%
3 ARRAY BIOPHARMA INC 3 06/01/2020 22,534,000 22,210,000 10.11% PRN
4 RETROPHIN INC COM 1,007,660 20,415,000 9.29%
5 EPIZYME INC COM 1,492,700 19,196,000 8.74%
6 ASSEMBLY BIOSCIENCES INC 1,887,069 18,040,000 8.21%
7 KITE PHARMA INCORPORATED 281,400 15,668,000 7.13%
8 FLEX PHARMA INC COM 933,691 11,214,000 5.10%
9 COLLEGIUM PHARMACEUTICAL INC COM 465,118 10,284,000 4.68%
10 Life Technologies Corp 840,462 8,623,000 3.92%
11 Nabriva Therapeutics AG 835,530 7,938,000 3.61%
12 KINDRED BIOSCIENCES INC 1,323,431 6,882,000 3.13%
13 GENVEC INC 1,986,413 4,589,000 2.09%
14 CELLADON CORP 2,843,170 2,985,000 1.36%
15 ONCOTHYREON INC COM N/C EFF 6/ 943,500 2,585,000 1.18%
16 AKARI THERAPEUTICS PLC 100,709 2,417,000 1.10%
17 FORWARD PHARMA A/S 101,995 2,403,000 1.09%
18 FIVE PRIME THERAPEUTICS INC 149,000 2,293,000 1.04%
19 CALITHERA BIOSCIENCES INC 415,480 2,256,000 1.03%
20 GILEAD SCIENCES INC 3,255 2,148,000 0.98% Call
21 Orexigen Therapeutics, Inc. 937,958 1,979,000 0.90%
22 QLT INC 638,900 1,699,000 0.77%
23 VALEANT PHARMACEUTICALS INTL 1,265 1,347,000 0.61% Call
24 Catalyst Biosciences 56,000 261,000 0.12%
25 REGULUS THERAPEUTICS INC 1,280 35,000 0.02% Call

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001140361-15-041435, filed 2015.11.16).

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.