Anthropic, OpenAI and SpaceX Line Up IPOs, Sparking a Race for Advisers

AI leaders Anthropic and OpenAI, along with rocket maker SpaceX, have filed confidential IPO paperwork with the U.S. SEC in quick succession, triggering a rare scramble among top law firms and investment banks for the work. Anthropic filed a confidential draft registration statement on June 1, 2026, preserving the option of a public listing while saying the actual timing depends on market conditions (Reuters, Yahoo Finance). OpenAI filed its own confidential paperwork days later, and SpaceX, which submitted a confidential S-1 in April, listed on NASDAQ on June 12.