Y Combinator

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

Y Combinator accounts for 271 tracked companies with verified cap-table data, 271 of which disclose round sizes totalling $48B. The median disclosed raise is $83M, and the largest is EquipmentShare at $3.2B, ahead of Zepto ($1.9B) and MessageBird ($1.8B).

The names that recur most often on these co-invested cap tables are Y Combinator (271 companies), General Catalyst (22 companies), Khosla Ventures (22 companies), Sequoia Capital (21 companies), Accel (20 companies), Andreessen Horowitz (19 companies). By latest disclosed round, the market skews Series B (96), Series A (50), Series C (41), Seed (18).

Best funded Y Combinator companies

  1. EquipmentShare — $3.2B (latest: IPO)
  2. Zepto — $1.9B (latest: Series F)
  3. MessageBird — $1.8B (latest: Series A)
  4. Rappi — $1.7B (latest: Series F)
  5. Aurora — $1.7B (latest: Seed)
  6. Flexport — $1.3B (latest: Growth)
  7. Astranis — $1.2B (latest: Series E)
  8. Meesho — $1.1B (latest: IPO)
  9. Human Interest — $1B (latest: Growth)
  10. Flock Safety — $950M (latest: Growth)
  11. Replit — $878M (latest: Series D)
  12. Solugen — $640M (latest: Series D)
  13. Checkr — $550M (latest: Series E)
  14. GoCardless — $529M (latest: Series G)
  15. Vanta — $504M (latest: Series C)

Y Combinator — related firms and companies (56)

Y Combinator profile · All research reports

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•By Alejandro Cremades