Third Rock Ventures

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

Third Rock Ventures accounts for 40 tracked companies with verified cap-table data, 40 of which disclose round sizes totalling $8.9B. The median disclosed raise is $150M, and the largest is Revolution Medicines at $2.1B, ahead of Tubulis ($575M) and Candid Therapeutics ($370M).

The names that recur most often on these co-invested cap tables are Third Rock Ventures (40 companies), Casdin Capital (8 companies), GV (5 companies), Nextech Invest (5 companies), RA Capital Management (5 companies), Foresite Capital (4 companies). By latest disclosed round, the market skews Series A (16), Series B (9), Series C (8), IPO (3).

Best funded Third Rock Ventures companies

  1. Revolution Medicines — $2.1B (latest: IPO)
  2. Tubulis — $575M (latest: Series A)
  3. Candid Therapeutics — $370M (latest: Series A)
  4. Thrive Earlier Detection — $367M (latest: Series B)
  5. Decibel Therapeutics — $341M (latest: Series C)
  6. Seaport Therapeutics — $330M (latest: Series A)
  7. Flare Therapeutics — $287M (latest: Series C)
  8. Pliant Therapeutics — $251M (latest: IPO)
  9. Terremoto Biosciences — $250M (latest: Series B)
  10. ARTBIO — $245M (latest: Series B)
  11. Asher Bio — $215M (latest: Series C)
  12. Marea Therapeutics — $190M (latest: Series B)
  13. Syremis Therapeutics — $165M (latest: Series A)
  14. Corvia Medical — $163M (latest: Series U)
  15. Casma Therapeutics — $162M (latest: Grant)

Third Rock Ventures GP VII, L.P. — related firms and companies (56)

Third Rock Ventures GP VII, L.P. profile · All research reports

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