(FILES) OpenAI CEO Sam Altman speaks during the US Federal Reserve Board of Governors' "Integrated Review of the Capital Framework for Large Banks Conference" at the Federal Reserve in Washington, DC, on July 22, 2025. ChatGPT maker OpenAI is preparing to file for a stock market listing in the coming days, possibly as early as Friday, the Wall Street Journal reported on May 20, 2026, citing people familiar with the matter. Valued at $852 billion in a recent funding round, OpenAI is working with bankers at Goldman Sachs and Morgan Stanley on a draft prospectus it plans to file confidentially with regulators, with the aim of going public as early as September, according to the report. (Photo by Mandel NGAN / AFP via Getty Images)