Anthropic Confidentially Files for IPO at $965 Billion Valuation

Anthropic, the San Francisco-based AI company behind the Claude model family, has confidentially filed for an initial public offering with the U.S. Securities and Exchange Commission, according to three sources with direct knowledge of the matter. The company is seeking a valuation of approximately $965 billion, which would make it one of the largest technology IPOs in history.

The confidential filing, submitted under the JOBS Act provisions that allow companies to keep their S-1 documents private until closer to the actual offering, signals that Anthropic believes market conditions are favorable for a public debut. The company was last valued at $61.5 billion in a private funding round led by Menlo Ventures in late 2025, meaning the IPO would represent an almost 16x markup in under a year.

Claude's Meteoric Rise

Anthropic's trajectory has accelerated dramatically since the release of Claude 3.5 Sonnet in mid-2025, which established the company as a leader in enterprise AI deployment. Claude models are now deeply integrated into Amazon Web Services through the Bedrock platform, and the company has secured multi-billion-dollar commitments from both Amazon and Google. Corporate adoption of Claude for coding, legal document analysis, and customer service automation has driven revenue growth that insiders describe as "exponential."

The company's focus on AI safety — enshrined in its founding as a public benefit corporation and its departure from OpenAI by siblings Dario and Daniela Amodei — has also resonated with enterprises and governments seeking trustworthy AI partners. Anthropic's constitutional AI approach and emphasis on interpretability research have become key differentiators in a crowded market.

What a Near-Trillion-Dollar IPO Means

The proposed $965 billion valuation places Anthropic in rarefied territory, exceeding the combined market capitalizations of most pre-IPO tech companies. Analysts note that the figure likely includes projections of future AI market dominance based on Anthropic's enterprise contracts and the rapid expansion of the AI-as-a-service sector, which is projected to exceed $1 trillion annually by 2028.

Goldman Sachs and Morgan Stanley are reported to be the lead underwriters for the offering. The IPO is expected to commence roadshows in late summer 2026, with a public listing on the NYSE under the ticker symbol "ANTH" tentatively planned for September. Anthropic declined to comment on what it characterized as "market speculation."

"Anthropic's IPO will be a watershed moment for the AI industry. It's the first pure-play frontier AI company to test public market appetite at this scale." — VC investor with knowledge of AI sector dynamics

Source: CNBC, The Information, and Financial Times reports based on sources familiar with the filing.