Avidity Partners

Portfolio Co Investors 2026 for Avidity Partners: investors, rounds, and co-investor patterns from StartupFundraising.com research, updated for 2026.

Avidity Partners accounts for 19 tracked companies with verified cap-table data, 19 of which disclose round sizes totalling $3.2B. The median disclosed raise is $127M, and the largest is Innovaccer at $675M, ahead of Endeavor BioMedicines ($292M) and Crossover Health ($292M).

The names that recur most often on these co-invested cap tables are Avidity Partners (19 companies), Casdin Capital (4 companies), Omega Funds (3 companies), Longitude Capital (3 companies), Invus (3 companies), OrbiMed (3 companies). By latest disclosed round, the market skews Series A (5), Series C (5), Series B (4), Series D (2).

Best funded Avidity Partners companies

  1. Innovaccer — $675M (latest: Series F)
  2. Endeavor BioMedicines — $292M (latest: Series A)
  3. Crossover Health — $292M (latest: Series D)
  4. Amunix — $193M (latest: Series B)
  5. Artios Pharma — $186M (latest: Series C)
  6. ESCAPE Bio — $184M (latest: Series C)
  7. Century Therapeutics — $160M (latest: Series C)
  8. Quanta Therapeutics — $142M (latest: Series D)
  9. Cyteir Therapeutics — $140M (latest: Series C)
  10. BioTheryX — $127M
  11. Nested Therapeutics — $125M (latest: Series A)
  12. 858 Therapeutics — $110M (latest: Series A)
  13. MBrace Therapeutics — $110M (latest: Series B)
  14. Dianthus Therapeutics — $100M (latest: Series A)
  15. connectRN — $100M (latest: Series B)

Avidity Partners Management LP — related firms and companies (56)

Avidity Partners Management LP profile · All research reports

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