Anthropic Files Confidential IPO Papers with $965 Billion Valuation

AI startup Anthropic confidentially filed a draft registration statement with the U.S. Securities and Exchange Commission on June 1, 2026, to launch an initial public offering. The company is targeting a market debut as early as October 2026 and has selected Morgan Stanley, Goldman Sachs, and JPMorgan Chase as underwriters. This move places Anthropic ahead of its primary rival, OpenAI, in the race to go public.

The filing follows a May 28 Series H funding round that raised $65 billion, valuing the company at $965 billion and surpassing OpenAI's last reported valuation of $852 billion. Anthropic's growth is driven by the launch of Claude Opus 4.8 and the Claude Code tool, contributing to an annual revenue run rate of approximately $47 billion. To sustain this growth, Anthropic secured a $100 billion 10-year commitment with Amazon Web Services and a $1.25 billion monthly lease for Nvidia chips and compute capacity from SpaceX's Colossus data centers.

Despite its commercial success, the company faces a legal dispute with the U.S. Department of Defense, which designated Anthropic a supply chain risk after CEO Dario Amodei refused the military unrestricted access to its AI models. OpenAI CEO Sam Altman responded to the filing by stating his company intends to go public but is currently prioritizing technology delivery over the timing of the financing event.