Quoting John Gruber
Y Combinator holds approximately a 0.6 percent stake in OpenAI, according to an anonymous source familiar with OpenAI investors. Based on OpenAI's current valuation of $852 billion, the stake is worth over $5 billion. The exact size of Y Combinator's ownership has been difficult to confirm publicly.
- ▪Y Combinator owns about 0.6 percent of OpenAI.
- ▪OpenAI has a current valuation of $852 billion.
- ▪The value of Y Combinator's stake exceeds $5 billion.
- ▪The information comes from an anonymous source with knowledge of OpenAI investors.
- ▪Details about Y Combinator's stake are not publicly disclosed and are difficult to obtain.
Opening excerpt (first ~120 words) tap to expand
So it’s well known that Y Combinator owns some stake in OpenAI. But how big is that stake? This seems like devilishly difficult information to obtain. I asked around and a little birdie who knows several OpenAI investors came back with an answer: Y Combinator owns about 0.6 percent of OpenAI. At OpenAI’s current $852 billion valuation, that’s worth over $5 billion.
Excerpt limited to ~120 words for fair-use compliance. The full article is at Simon Willison's Weblog.