Looks like he was an angel investor in a lot of BIG startups, so not too surprising: https://en.wikipedia.org/wiki/Sam_Altman#Pre-YC_angel_investing https://en

Looks like he was an angel investor in a lot of BIG startups, so not too surprising: https://en.wikipedia.org/wiki/Sam_Altman#Pre-YC_angel_investing https://en.wikipedia.org/wiki/Sam_Altman#Pre-YC_angel_invest...