On June 1, 2026, Anthropic, PBC announced that it had confidentially submitted a draft registration statement on Form S-1 to the U.S. Securities and Exchange Commission for a proposed initial public offering of common stock. The company said the filing gives it the option to go public after the SEC completes its review, and that any offering would depend on market conditions and other factors. The number of shares and the price had not yet been set.
The move came just days after Anthropic’s $65 billion Series H closed at a $965 billion post-money valuation, positioning the company for what would be one of the largest technology IPOs in history. By filing confidentially, Anthropic took an early procedural step ahead of rival OpenAI, which was reported to be preparing its own filing.
For a general reader, a confidential S-1 is the standard, low-risk way large private companies begin testing the public markets without committing to a timeline. The significance here is the scale: a frontier AI lab approaching public-market status at close to a trillion-dollar valuation signals that AI model development has matured into one of the most capital-intensive sectors in technology.