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

Deal history

34 participations
DateCompanyRaisedRole
—OpenAI▮▮
Sep 2026Hubble Network▮▮
Sep 2026Numeral Two▮▮
+ 31 more deals · all 34, priced and dated
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Investment activity

Y Combinator joined 8 recorded rounds in the last two years (6 in the last 12 months), up from 1 in the two years before. By year: 6 in 2026, 2 in 2025 and 1 in 2023. Across all 34 recorded rounds, 15 were seed, 11 were later-stage and 7 were early-stage. Y Combinator is recorded as lead on 3 of them. 5 rounds landed in the last 90 days. Y Combinator most often invests alongside Founders Fund (7 shared rounds), Initialized Capital (6 shared rounds) and FundersClub (4 shared rounds). Most recently: Numeral Two (Series C, Sep 2026) and Hubble Network (Series C, Sep 2026).

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