
Anthropic confidentially files S-1 at $965B valuation, beating OpenAI to the IPO line; targets fall 2026 listing
Anthropic confidentially submitted a draft registration statement on Form S-1 to the SEC on Monday, June 1, 2026, becoming the first major AI lab to formally begin the IPO process and beating rival OpenAI to public markets. The filing follows a ~$65 billion Series H round that pushed Anthropic's post-money valuation to roughly $965 billion — eclipsing OpenAI's valuation for the





