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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 (2016Q2)
Portfolio Summary: 32 holdings with a total value of $253,622,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 IRONWOOD PHARMACEUTICALS INC COM CL A 2,430,451 31,778,000 12.53%
2 GALAPAGOS NV 439,385 24,373,000 9.61%
3 RETROPHIN INC COM 1,225,084 21,819,000 8.60%
4 CYTOKINETICS INC 2,139,697 20,306,000 8.01%
5 ASSEMBLY BIOSCIENCES INC 2,943,164 16,335,000 6.44%
6 FIBROGEN INC COM 788,745 12,943,000 5.10%
7 ACCELERON PHARMA 371,381 12,620,000 4.98%
8 GILEAD SCIENCES INC 150,000 12,513,000 4.93% Call
9 ALLERGAN PLC 50,000 11,555,000 4.56% Call
10 INTRA CELLULAR THERAPIES INC COM 244,950 9,509,000 3.75%
11 DERMIRA INC 272,000 7,956,000 3.14%
12 EPIZYME INC COM 755,046 7,732,000 3.05%
13 IRONWOOD PHARMACEUTICALS INC 581,500 7,606,000 3.00% Call
14 KURA ONCOLOGY INC 2,465,286 6,681,000 2.63%
15 INTELLIA THERAPEUTICS INC 310,695 6,633,000 2.62%
16 ACHAOGEN INC COM 1,571,708 5,957,000 2.35%
17 BEIGENE LTD 175,380 5,226,000 2.06%
18 KINDRED BIOSCIENCES INC 1,432,765 5,072,000 2.00%
19 Nabriva Therapeutics AG 562,741 4,221,000 1.66%
20 Syndax Pharmaceuticals Inc 357,365 3,520,000 1.39%
21 COLLEGIUM PHARMACEUTICAL INC COM 281,776 3,339,000 1.32%
22 XENCOR INC COM 168,000 3,190,000 1.26%
23 ENANTA PHARMACEUTICALS INC COM 136,882 3,018,000 1.19%
24 EDITAS MEDICINE INCORPORATED 85,469 2,085,000 0.82%
25 ARRAY BIOPHARMA INC 520,000 1,851,000 0.73% Call
26 FORWARD PHARMA A/S 84,332 1,532,000 0.60%
27 IMMUNOGEN INC 299,500 922,000 0.36% Call
28 AKARI THERAPEUTICS PLC 63,468 856,000 0.34%
29 TESARO INC 9,200 773,000 0.30%
30 ADVAXIS INC COM NEW 92,800 751,000 0.30%
31 TARGACEPT INC 669,166 669,000 0.26% PRN
32 EIGER BIOPHARMACEUTICALS INC 14,190 281,000 0.11%

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001140361-16-076455, 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.