Anthropic, the AI company behind the Claude chatbot, confidentially filed a draft S-1 registration statement with the SEC on June 1, 2026. The move sets the stage for what could be one of the largest public market debuts in history, with the company potentially crossing the trillion-dollar threshold before retail investors even get a chance to buy in.
The filing landed just four days after Anthropic closed a massive $65 billion Series H funding round on May 28, pushing its private valuation to $965 billion.
From $380 billion to $965 billion in four months
Back in February 2026, the company was valued at $380 billion. By late May, that number had more than doubled to $965 billion.
The IPO itself is expected to land sometime in the fall of 2026, though that timeline depends on market conditions. Confidential S-1 filings give companies flexibility to quietly work through the SEC review process before committing to a public offering date.
