Anthropic confidentially files for US IPO, beating OpenAI - Reuters

Anthropic has confidentially filed for a U.S. initial public offering, according to a Reuters report published June 1, 2026. The filing gives the company an early lead over rival OpenAI in what the article describes as a race that will define the future business shape of artificial intelligence.

The confidential filing means the details of the IPO, including the number of shares and expected price range, are not publicly available at this stage. The move positions Anthropic as a frontrunner in the competition among AI companies to access public capital markets.

Anthropic was founded by former OpenAI employees and has positioned itself as a safety-focused AI developer. The IPO filing comes as both companies seek to scale their operations and commercialize their technology. The timing and size of the offering have not been disclosed.