Anthropic Files for IPO at $965 Billion - On Track for the Largest Public Offering Ever

Anthropic has submitted a confidential draft registration statement to the SEC, marking the first formal step towards a potential initial public offering. The filing comes just four days after the AI company closed a £65 billion Series H funding round, demonstrating remarkably swift movement from private fundraising to public market preparation. The timing follows Anthropic's recent £65 billion funding round that valued the company at £965 billion post-money, already surpassing OpenAI's most recent valuation. The company's annualised revenue has reportedly reached close to £47 billion, driven primarily by enterprise adoption of its Claude AI system for coding applications and autonomous agents. Reports suggest Anthropic is targeting an IPO valuation between £1.75 trillion and £1.8 trillion, with potential proceeds of up to £75 billion. If realised, this would represent the largest initial public offering in history by a considerable margin. The confidential S-1 filing provides Anthropic with the option to proceed with a public listing once SEC review concludes, though it carries no obligation to actually list. The rapid progression from major private funding to IPO preparation signals strong investor confidence in Anthropic's market position and growth trajectory. While a confidential S-1 filing represents preparation rather than commitment, the scale and speed of these moves indicate institutional investors' belief in the company's public market readiness.