Signal Anthropic Files Confidential IPO Paperwork, Valuation Reaches $965 Billion

Summary

Anthropic confidentially submitted a draft S-1 registration statement to the SEC on 1 June 2026, saying this gives it the option to go public after SEC review, without yet setting a share price, share count or listing date. The $965 billion valuation stems from a $65 billion Series H-1 round in May 2026, co-led by Altimeter Capital, Dragoneer, Greenoaks, Sequoia Capital, Capital Group, Coatue and D1 Capital Partners, following a $30 billion Series G round in February 2026 at a $380 billion valuation. This makes Anthropic more valuable than OpenAI, which was valued at $852 billion after a March 2026 funding round; OpenAI was reported to be preparing its own confidential IPO filing. Anthropic's revenue run rate reportedly reached $47 billion as of May 2026, up from $10 billion in annual revenue the prior year. One industry guide reported the filing targets an October 2026 Nasdaq listing led by Goldman Sachs, JPMorgan and Morgan Stanley, aiming to raise more than $60 billion, with Wedbush Securities analysts calling it the start of “an opening of the floodgates” for a long-dormant IPO market.