(FILES) Open AI CEO Sam Altman speaks during a press conference with Kakao CEO Chung Shin-a at a hotel in Seoul on February 4, 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 Jung Yeon-je / AFP via Getty Images)