Odaily Planet Daily News OpenAI CEO Sam Altman has invested in more than 400 companies, with holdings worth at least $2.8 billion. As the CEO of OpenAI, Altman does not hold shares in OpenAI, and his annual salary at the company is about $65,000. But reports say that Altman's net worth recently broke the $2 billion mark. Although he does not hold shares in OpenAI, Altman is one of the most prolific individual investors in Silicon Valley. Today it was reported that he has invested in more than 400 companies, and as of the beginning of this year, his shares in these companies are worth at least $2.8 billion. Altman's investment companies include payment company Stripe, short-term rental platform Airbnb, social news forum Reddit, and Musk's brain-computer interface company Neuralink. (Sina Finance)