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EcoR1 Capital, LLC
Track EcoR1 Capital, LLC's latest SEC 13F filing: top biotech and life-sciences stock positions, portfolio weights, largest holdings, and quarter-over-quarter changes.
Updated quarterly · Last refreshed Aug 27, 2026
Showing 6 Stocks Out Of 28. Click On The Tickers For More Details
| Stock | Compnay Name | Shares Held | Market Value | % of Portfolio | QoQ Change |
|---|---|---|---|---|---|
 MBX | MBX BIOSCIENCES INC | 388.50 K | 21.45 M | 1 | |
 ETON | ETON PHARMACEUTICALS INC | 2.17 M | 78.62 M | 3.8 | |
 ERAS | ERASCA INC | 330.00 K | 6.04 M | 0.3 | |
 NRIX | NURIX THERAPEUTICS INC | 270.00 K | 6.55 M | 0.3 | |
 ORIC | ORIC PHARMACEUTICALS INC | 6.73 M | 72.86 M | 3.5 | |
 ZBIO | ZENAS BIOPHARMA INC | 789.50 K | 20.04 M | 1 |
Market Value
$ 1.81 B
Holdings
28
Period
Q2 2026
Holdings in Top 20
%
QoQ Changes
-12.71 %