Claude maker Anthropic files for IPO with the SEC

June 1, 2026 | Source: THE DECODER

Tags: Anthropic, IPO, SEC, Claude, AI valuation, OpenAI

Anthropic, valued at just under $1 trillion after its $65 billion Series H, has confidentially filed an S-1 registration with the SEC—formally beginning what could be the largest IPO in history as both OpenAI and SpaceX also prepare for public debuts.

Details

Anthropic announced Monday it has confidentially submitted a draft S-1 registration to the US Securities and Exchange Commission, formally beginning the IPO process. Key details—share count, price, and timing—have not been set. The company said the IPO 'will depend on market conditions and other factors.'\n\nThe filing comes days after Anthropic closed a $65 billion Series H funding round that pushed its post-money valuation to $965 billion, making it the world's most valuable startup. Its annualized revenue has been reported at $47 billion, though the company still operates at a loss due to compute and payroll costs.\n\nAnthropic is structured as a Public Benefit Corporation (PBC), a format that requires balancing social benefit with profit—a potential complication for traditional public market investors. Rival OpenAI is also preparing for an IPO, reportedly targeting as early as September 2026, while SpaceX is set to debut June 12 at a $1.75 trillion valuation. The three companies are each racing to secure capital for increasingly expensive frontier model training.