Co-investors · VC firm · United States

Who invests with Third Rock Ventures

33 investors have backed two or more of the 36 startups Third Rock Ventures has backed in rounds we track. Grouped by kind, each ranked by how many of these startups it shares; Casdin Capital shares the most, 14.

33co-investors
3kinds
Casdin Capitalmost shared (14)
VC firmsmost common kind

Third Rock Ventures's whole portfolioThird Rock Ventures's profile

VC firms

15

Private equity and asset managers

11

Corporate investors

7

Segment by segment

VC firms

15 investors

  1. Casdin CapitalVC firmUnited States14 backed
  2. DeerfieldVC firmUnited States7 backed
  3. FidelityVC firmUnited States7 backed
  4. Wellington ManagementVC firmUnited States6 backed
  5. The Column GroupVC firmUnited States4 backed
  6. Bessemer Venture PartnersVC firmUnited States4 backed
  7. Polaris PartnersVC firmUnited States3 backed
  8. FPFlagship Pioneering, LLCVC firmUnited States3 backed

Private equity and asset managers

11 investors

  1. RA Capital ManagementPrivate equityUnited States6 backed
  2. OrbiMedPrivate equityUnited States5 backed
  3. Janus Henderson InvestorsPrivate equityUnited Kingdom4 backed
  4. Foresite CapitalPrivate equityUnited States4 backed
  5. Nextech InvestPrivate equitySwitzerland3 backed
  6. Frazier Healthcare PartnersPrivate equityUnited States3 backed
  7. Perceptive AdvisorsAsset managerUnited States3 backed
  8. Cormorant Asset ManagementPrivate equityUnited States2 backed

Corporate investors

7 investors

  1. Google VenturesCorporate investorUnited States3 backed
  2. PfizerCorporate investorUnited States2 backed
  3. IpsenCorporate investorFrance2 backed
  4. SR OneCorporate investorUnited States2 backed
  5. PHPartners HealthCare InnovationCorporate investorUnited States2 backed
  6. PharmstandardCorporate investor-2 backed
  7. Access IndustriesCorporate investorUnited States2 backed

How this map is made. Every investor here has backed two or more of the same startups as Third Rock Ventures, in rounds we track. Grouped by kind, each ranked by how many startups it shares with Third Rock Ventures. Rebuilt nightly; updated 15 November 2026.

More portfolio maps

All portfolios
Sector portfolioThird Rock Ventures' Biotech portfolio30 startups · $6.7BCo-investorsWho invests with Techstars991 co-investorsCo-investorsWho invests with SV Angel988 co-investorsCo-investorsWho invests with Andreessen Horowitz977 co-investorsCo-investorsWho invests with Alumni Ventures911 co-investorsCo-investorsWho invests with Sequoia Capital827 co-investors

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