Most Active Biotech Investors in Seattle 2026

8 firms writing Biotech checks in Seattle, led by InCube Ventures, Social Starts, Dimension Capital — ranked by verified deal count with the companies behind.

Biotech in Seattle accounts for 11 tracked companies with verified cap-table data, 11 of which disclose round sizes totalling $1.9B. The median disclosed raise is $187M, and the largest is Athira Pharma at $289M, ahead of ProfoundBio ($250M) and Avalyn Pharma ($211M).

The names that recur most often on these biotech cap tables are RA Capital Management (3 companies), T. Rowe Price (2 companies), Janus Henderson Investors (2 companies), OrbiMed (2 companies), National Institute on Aging (1 company), Ally Bridge Group (1 company). By latest disclosed round, the market skews Series B (4), Series A (4), Series C (2), IPO (1).

Best funded Biotech in Seattle companies

  1. Athira Pharma — $289M (latest: IPO)
  2. ProfoundBio — $250M (latest: Series B)
  3. Avalyn Pharma — $211M (latest: Series B)
  4. Outpace Bio — $200M (latest: Series A)
  5. Curevo — $192M (latest: Series B)
  6. Callio Therapeutics — $187M (latest: Series A)
  7. Lumen Bioscience — $185M (latest: Series C)
  8. Umoja Biopharma — $153M (latest: Series C)
  9. Tasso — $120M (latest: Series B)
  10. Cajal Neuroscience — $96M (latest: Series A)
  11. Arzeda — $12M (latest: Series A)

Sector × city funding reports (20)

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•By Alejandro Cremades