OpenAI confidentially files for IPO, adding to a blockbuster tech line-up as the AI giant joins Anthropic and SpaceX in going to market.

OpenAI's confidential filing lands days before SpaceX is set to go public and a week after Anthropic announced its confidential disclosure with the SEC.

June 8 : ChatGPT-maker OpenAI confidentially filed for a U.S. initial public offering on Monday, joining rival Anthropic in a push toward the stock market as investors seek…

Claude-maker Anthropic filed to go public on June 1, while competitor SpaceX will debut on the Nasdaq on June 12.