EcoR1 Capital, LLC

EcoR1 Capital, LLC is an Investment Adviser institutional filer with the SEC under CIK 1587114, reporting 31 portfolio positions, with 20 historical 13F filings on file. Most recent reporting period: 2026-06-30.

A Form 13F reports a manager's US-listed stock and option positions only. It does not include real estate, private funds, bonds, cash or non-US holdings, so a 13F portfolio value is not the firm's total assets under management (AUM).

• State of incorporation: DE
• Filing type: 13F-HR
• Latest reporting period: 2026-06-30
• Last filed: 2026-08-14

Top 10 portfolio positions

The largest reported holdings in EcoR1 Capital, LLC's most recent 13F filing, ranked by reported market value.

1. ZYMEWORKS INC (ZYME)
2. ANAPTYSBIO INC (ANAB)
3. AKTIS ONCOLOGY INC (AKTS)
4. CG ONCOLOGY INC (CGON)
5. ETON PHARMACEUTICALS INC (ETON)
6. CRISPR THERAPEUTICS AG (CRSP)
7. ORIC PHARMACEUTICALS INC (ORIC)
8. FIRST TRACKS BIOTHERAPEUTICS (TRAX)
9. LAKEFRONT BIOTHERAPEUTICS NV (GLPG)
10. NEUROGENE INC (NGNE)