Key facts
- Y Combinator is a other based in Mountain View, California with 1505 tracked portfolio companies.
- Notable positions include OpenAI, Stripe, Kalshi, Scale AI, Helion.
- Private Market View records 19 deal participations by Y Combinator.
- Y Combinator’s most recent recorded investment was in Mar 2026, one of 1 in the last 12 months.
- Y Combinator has 6 funds on record, raising $381.0M across the 2 that report a size.
- The team roster lists 31 people.
About Y Combinator
Founded in 2005, Y Combinator is an accelerator/incubator based in Mountain View, California. The firm seeks to provide resources and investments to startups operating in the business-to-business software and services, education, consumer, healthcare, real estate and construction, financial technology, industrials, and government sectors.
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- ·The book's top 25 — of 1505 recorded positions
- ·Every recorded deal — 19 rounds
- ·Watchlist + alerts for Y Combinator's activity
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Portfolio, priced
1505 companies · by our current valuations| Company | Industry | Valuation | First invested | Role |
|---|---|---|---|---|
| OpenAI | Software Development Applications | $894.3B | — | |
| Stripe | Other Financial Services | $184.4B | — | |
| Kalshi | Other Financial Services | $35.0B | — | |
| Scale AI | Business/Productivity Software | $29.0B | — | |
| Helion | Alternative Energy Equipment | $15.0B | — | |
| Whatnot | — | $11.5B | — | |
| Replit | Software Development Applications | $9.3B | — | |
| Gusto | Business/Productivity Software | $9.3B | — | |
| Stoke Space | E-Commerce | $9.0B | — | |
| Flock Safety | Electronic Equipment and Instruments | $8.4B | — | |
| Benchling | Other Healthcare Technology Systems | $6.1B | — | |
| EquipmentShare | Other Commercial Services | $5.6B | — | |
| Legora | Business/Productivity Software | $5.5B | — | |
| Checkr | Business/Productivity Software | $4.6B | — | |
| Vanta | — | $4.2B | — | |
| + 1490 more companies · a free account shows the top of the book | ||||
Recent deals
19 recordedFunds
6 recorded- Y Combinator Fund II (Y Combinator)—
- Y Combinator ES26, LLC2026$228.3M
- Y Combinator ES24, LLC2024$152.7M
- Y Combinator ES20, LLC2020—
- Y Combinator Continuity Affiliates Fund I, L.P.2016—
- Y COMBINATOR CONTINUITY FUND I, L.P.2015—
$381.0M raised across the 2 funds that report a size
Team
31 people on record — 14 with verified contacts
Partners, principals, and the people who answer a pitch. Pro members reveal contacts with credits.
Frequently asked
- What companies does Y Combinator invest in?
- Y Combinator has 1505 recorded portfolio companies, including OpenAI, Stripe, Kalshi, Scale AI.
- What is Y Combinator's AUM?
- Y Combinator manages approximately $3.2B in assets.
- Is Y Combinator actively investing?
- Y Combinator's most recent recorded investment was in Mar 2026, with 1 investments in the last 12 months.