Y Combinator focuses on investing in early-stage startups with high growth potential, often before they have a finished product or significant revenue, across various innovative sectors like AI and climate tech. Their strategy involves providing seed funding of $500,000, mentorship, and an intensive three-month accelerator program to help founders build and scale their companies.
Deal activity increased 60% year-over-year (162 deals in the last 12 months). Their most common stage is seed (46% of deals). Average disclosed round size is $25.9M (across 939 rounds with reported amounts).
Portfolio
1,049
Fund Size
$12.2B
Top Stage
Seed
Last 12 Mo
162
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
1049 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Latent | Series A | $80M | Apr 2026 |
 Nexus | Seed | $4.3M | Apr 2026 |
 Variance | Series A | $21.5M | Apr 2026 |
 Conntour | Seed | $7M | Mar 2026 |
 Glimpse | Series A | $35M | Mar 2026 |
 Trayd | Series A | $10M | Mar 2026 |
 Conduit | Seed | $6M | Mar 2026 |
| LLatent Health | Series A | $80M | Mar 2026 |
 Gumloop | Series B | $50M | Mar 2026 |
 Juicebox | Series B | $80M | Mar 2026 |
 Legora | Series D | $550M | Mar 2026 |
 Escape | Series A | $18M | Mar 2026 |
 AgentMail | Seed | $6M | Mar 2026 |
| LLio | Series A | $30M | Mar 2026 |
| SScience Corporation | Series C | $230M | Mar 2026 |
 Denki | Seed | $4.1M | Mar 2026 |
 Trace | Seed | $3M | Feb 2026 |
 Encord | Series C | $60M | Feb 2026 |
 Harper | Series A | $46.8M | Feb 2026 |
 Letter AI | Series B | $40M | Feb 2026 |
 Humand | Series A | $66M | Feb 2026 |
| MManufact | Seed | $6.3M | Feb 2026 |
 Santé | Series A | $7.6M | Feb 2026 |
 Simple AI | Seed | $14M | Feb 2026 |
 Bretton AI | Series B | $75M | Feb 2026 |
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Top Co-Investors
Andreessen Horowitz60 shared
SV Angel55 shared
Soma Capital53 shared
Initialized Capital49 shared
General Catalyst48 shared
Founders Fund39 shared
Khosla Ventures36 shared
Sequoia Capital35 shared
Liquid 2 Ventures32 shared
Pioneer Fund29 shared
Accel29 shared
Tiger Global Management26 shared
FundersClub26 shared
Kleiner Perkins26 shared
Rebel Fund26 shared
First Round Capital24 shared
Goodwater Capital24 shared
Index Ventures22 shared
Gradient Ventures21 shared
Bain Capital Ventures20 shared
Last updated: 10 April 2026