Looks like he was an angel investor in a lot of BIG startups, so not too surprising:<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Sam_Altman#Pre-YC_angel_investing" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Sam_Altman#Pre-YC_angel_invest...</a>