OpenAI confidentially files for initial public offering on US stock market

OpenAI has filed confidentially to go public on the US stock market, with an expected valuation exceeding $850 billion, making it one of the largest IPO (initial public offering, when a private company first sells shares to the public) listings in history. The company announced the filing preemptively because it expected the confidential submission to become public anyway, and stated it has not yet decided on a timeline for going public.