Y Combinator

Other · Mountain View, California

Founded in 2005, Y Combinator is an accelerator/incubator based in Mountain View, California. 1,506 portfolio companies, 34 recorded rounds and 6 funds are on record.

AUM
$3.2B
Portfolio companies
1,506
Recorded deals
34
1 in last 12M
Last investment
Mar 2026

Y Combinator's book

1506 companies · priced for members
CompanyValuationRole
OpenAI▮▮
Stripe▮▮
Kalshi▮▮
+ 1,503 more companies · all 1,506, priced and dated
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Y Combinator portfolio at a glance

1,506 portfolio companies are on record for Y Combinator, including OpenAI, Stripe and Kalshi.

639 of the 1,506 carry a recorded valuation and 11 have recorded secondary-market trades, the names a secondary buyer or seller can price.

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  • ·The top 10 names in the book — of 1506 recorded positions
  • ·The 10 latest deals — of 34 rounds
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