Anthropic Files Confidential S-1 With SEC — Sets Stage for Trillion-Dollar IPO

The Washington Post·high signal

Anthropic submitted a confidential draft registration statement (Form S-1) to the SEC on June 1, 2026, leapfrogging OpenAI in the race to go public. The filing follows last week's $65B Series H at $965B valuation and positions Anthropic as one of three potential trillion-dollar IPO debuts this year alongside SpaceX and OpenAI. For builders: this signals Anthropic's long-term stability as a platform bet — enterprise commitments and API pricing likely to remain aggressive through the IPO window.