Y Combinator's Stake in OpenAI (0.6%)
Y Combinator holds a 0.6% stake in OpenAI, which is valued at over $5 billion given OpenAI's $852 billion valuation. This stake originated from YC Research, an offshoot of Y Combinator, when Sam Altman was president of YC and helped seed OpenAI in 2016. The financial interest raises questions about potential bias in public endorsements of Altman by Y Combinator co-founders, particularly Paul Graham.
- ▪Y Combinator owns approximately 0.6% of OpenAI.
- ▪This stake is worth over $5 billion based on OpenAI's $852 billion valuation.
- ▪OpenAI was initially seeded by YC Research in 2016 when Sam Altman was president of Y Combinator.
- ▪Paul Graham, a Y Combinator co-founder, has been quoted as a character reference for Sam Altman despite holding a significant financial interest in OpenAI.
- ▪Gary Marcus previously highlighted that Altman has an indirect financial stake in OpenAI through his ownership in Y Combinator.
Opening excerpt (first ~120 words) tap to expand
Y Combinator’s Stake in OpenAI Monday, 4 May 2026 Speaking of companies with valuable minority stakes in AI companies, there’s one thing that stuck in my craw about the blockbuster Ronan Farrow / Andrew Marantz investigative piece on Sam Altman and OpenAI last month for The New Yorker. It didn’t come up during Nilay Patel’s excellent interview with Farrow on Decoder, either. Sam Altman was the president of Y Combinator for several years, and left to become the full-time CEO of OpenAI. The New Yorker quotes Y Combinator co-founder Paul Graham multiple times, in the context of Altman’s trustworthiness.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Hacker News: Front Page.
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