Sam Altman, CEO of OpenAI, owns about 12.2 million shares of Reddit (NYSE: RDDT), a stake now worth close to $2 billion, making him one of its largest individual shareholders despite holding no direct equity in OpenAI. Regulatory filings around Reddit's 2024 initial public offering showed entities affiliated with Altman owned about 8.7% of the company, making him its third-largest shareholder. He began investing in Reddit's 2014 Series B round and added $60 million in 2021. After Reddit's post-earnings surge in late 2024, the stake was valued at north of $1 billion, though some shares sit in funds where his economic interest is smaller. Altman has repeatedly said he holds no direct equity in OpenAI and takes a modest salary, though investigations revealed small, indirect holdings he has mostly sold. As of late 2024, he had no ongoing, material economic stake in OpenAI's core entity. Reddit's AI licensing business has become a meaningful revenue stream: in 2024, Reuters and other outlets reported a roughly $60 million-per-year data deal with Alphabet, and analysis of Reddit's filings plus Adweek's coverage suggests OpenAI pays on the order of $70 million annually.