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EcoR1 Capital, LLC
hedge fundUpdated 27 days agoManaged by Ecor1 Capital, Llc • Latest filing Q2 2026
Portfolio value
$2.1B
Q2 2026
Filings
14
Quarterly 13F history
Top-10 concentration
98.1%
Weight of largest holdings
Annualized return
-8.8%
Implied from 13F holdings
Portfolio value history
13F-disclosed portfolio value over 14 quarters
Show data table
| Period | Portfolio value |
|---|---|
| Q1 2023 | $3.1B |
| Q2 2023 | $4.1B |
| Q3 2023 | $3B |
| Q4 2023 | $3.9B |
| Q1 2024 | $4B |
| Q2 2024 | $3.3B |
| Q3 2024 | $2.9B |
| Q4 2024 | $2.6B |
| Q1 2025 | $1.7B |
| Q2 2025 | $1.7B |
| Q3 2025 | $2.1B |
| Q4 2025 | $2.2B |
| Q1 2026 | $2.4B |
| Q2 2026 | $2.1B |
Top holdings
33 positions as of Q2 2026
| # | Stock | Value | Shares | % Portfolio | Change |
|---|---|---|---|---|---|
| 1 | Z ZYME ZYMEWORKS INC | $600.4M | 22.97M | 29.19% | — |
| 2 | A ADI ANAPTYSBIO INC | $531.9M | 7.88M | 25.86% | — |
| 3 | A AKTS AKTIS ONCOLOGY INC | $155.5M | 4.82M | 7.56% | — |
| 4 | C CGON CG ONCOLOGY INC | $106.2M | 1.49M | 5.16% | — |
| 5 | E ETON ETON PHARMACEUTICALS INC | $78.6M | 2.17M | 3.82% | — |
| 6 | C CRSP CRISPR THERAPEUTICS AG | $75.8M | 1.39M | 3.68% | — |
| 7 | O ORIC ORIC PHARMACEUTICALS INC | $72.9M | 6.73M | 3.54% | — |
| 8 | ? N/A FIRST TRACKS BIOTHERAPEUTICS | $63.9M | 3.17M | 3.11% | — |
| 9 | G GLPGF LAKEFRONT BIOTHERAPEUTICS NV | $50M | 1.67M | 2.43% | — |
| 10 | N NGNE NEUROGENE INC | $40M | 1.27M | 1.94% | — |
| 11 | C CGON CG ONCOLOGY INC | $39.9M | 561.5K | 1.94% | — |
| 12 | S STOK STOKE THERAPEUTICS INC | $24M | 735.0K | 1.17% | — |
| 13 | ? N/A FULCRUM THERAPEUTICS INC | $24M | 6.55M | 1.17% | — |
| 14 | L LEGN LEGEND BIOTECH CORP | $23.1M | 800.0K | 1.12% | — |
| 15 | ? N/A BRIDGEBIO ONCOLOGY THERAPEUT | $21.5M | 2.82M | 1.05% | — |
| 16 | M MBX MBX BIOSCIENCES INC | $21.4M | 388.5K | 1.04% | — |
| 17 | Z ZBIO ZENAS BIOPHARMA INC | $20M | 789.5K | 0.97% | — |
| 18 | ? N/A ATARA BIOTHERAPEUTICS INC | $17.8M | 1.55M | 0.87% | — |
| 19 | R RLAY RELAY THERAPEUTICS INC | $13.1M | 697.9K | 0.63% | — |
| 20 | A AURA AURA BIOSCIENCES INC | $11.8M | 1.67M | 0.58% | — |