- OpenAI CEO Sam Altman owns multi-million dollar properties in San Francisco, Napa, and Hawaii.
- Altman, who was fired and then reinstated as CEO of OpenAI this month, has tried to keep a relatively low profile.
- When BI set out to catalog his assets, we found a giant estate that's previously unknown.
Years before the recent drama at OpenAI turned CEO Sam Altman into a household name, the former Y Combinator president went on an extraordinary 18-month, $85 million real-estate shopping spree, according to records reviewed by Business Insider — including a previously unreported $43 million Hawaii estate on land that locals describe as historically significant.