Anthropic Files Confidential IPO at ~$965B Valuation, Beating OpenAI by a Week

Summary: Anthropic filed a confidential Form S-1 with the SEC, kicking off what could be the largest AI IPO in history — just days after closing a $65B funding round and more than a week before rival OpenAI did the same.

Key Facts

• June 1, 2026: Confidential draft Form S-1 submitted to the SEC
• Implied valuation: approximately $965 billion — near the $1 trillion mark
• $65 billion Series H funding round closed immediately before the filing
• Share count and offering price are not yet set; timing depends on market conditions
• Filed seven days ahead of OpenAI's own confidential submission on June 8

Why It Matters

Two of the world's most valuable AI companies entering the public markets simultaneously signals that frontier AI has graduated from venture-backed bets to mainstream Wall Street assets. Anthropic's near-trillion valuation will set a benchmark that shapes how all frontier AI investment is priced going forward.

Read More

• Anthropic files to go public — TechCrunch
• Anthropic confidentially files IPO prospectus — CNBC