Artificial intelligence giant Anthropic, the company behind the Claude family of AI models, has officially started the clock on what could be one of the largest IPOs in U.S. history. On June 1, 2026, Anthropic confidentially submitted a draft Form S-1 registration statement to the U.S. Securities and Exchange Commission, initiating its initial public offering process.
The filing comes just days after Anthropic closed a $65 billion Series H funding round co-led by Altimeter Capital, Dragoneer, Sequoia Capital, and other top-tier institutional investors, pushing its post-money valuation to $965 billion — surpassing rival OpenAI, which was valued at $852 billion in March 2026. Analysts at Wedbush Securities describe a trillion-dollar market debut as the base case if market conditions cooperate.
Anthropic’s explosive growth underpins the filing. The company’s revenue run-rate hit approximately $47 billion in May 2026, up from roughly $10 billion the prior year — a near 5x annual jump. Claude is now embedded across Amazon Bedrock and major enterprise workflows, and the company’s coding assistant, Claude Code, has become a top tool among software developers. Fintech firm Ramp reported that more businesses used Anthropic than OpenAI for the first time in May 2026.
No share count, pricing, or listing date has been set. Anthropic is one of three highly anticipated AI IPOs expected in 2026, alongside SpaceX and OpenAI.
Source: TechCrunch – Anthropic Files to Go Public