Most Active Biotech Investors in Watertown 2026

7 firms writing Biotech checks in Watertown, led by Atlas Venture, Casdin Capital, ARCH Venture Partners — ranked by verified deal count with the companies.

Biotech in Watertown accounts for 10 tracked companies with verified cap-table data, 10 of which disclose round sizes totalling $2.4B. The median disclosed raise is $200M, and the largest is Treeline Biosciences at $1.1B, ahead of Triveni Bio ($277M) and Diagonal Therapeutics ($253M).

The names that recur most often on these biotech cap tables are Atlas Venture (3 companies), OrbiMed (2 companies), Fidelity Management & Research Company (2 companies), Janus Henderson Investors (2 companies), Deep Track Capital (2 companies), Cormorant Asset Management (2 companies). By latest disclosed round, the market skews Series A (3), Series B (2), Series C (1), Growth (1).

Best funded Biotech in Watertown companies

  1. Treeline Biosciences — $1.1B (latest: Series A)
  2. Triveni Bio — $277M (latest: Series C)
  3. Diagonal Therapeutics — $253M (latest: Series B)
  4. Remix Therapeutics — $211M (latest: Growth)
  5. Soufflé Therapeutics — $200M (latest: Series A)
  6. Nocion Therapeutics — $122M (latest: Series B)
  7. Lyra Therapeutics — $75M (latest: IPO)
  8. Progentos Therapeutics — $65M (latest: Series A)
  9. Nexo Therapeutics — $60M
  10. Arsenal Medical — $40M (latest: Seed)

Sector × city funding reports (20)

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•By Alejandro Cremades