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Anthropic Files S-1 for IPO at $965 Billion, Heating Up the Race with OpenAI

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Anthropic, the creator of Claude, has taken another monumental step by confidentially submitting a Form S-1 to the SEC, paving the way for an IPO that could value the company at up to $965 billion.

Context

This move comes shortly after Anthropic closed a $65 billion Series H round led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, reaching a post-money valuation of $965 billion. For the first time, Anthropic has surpassed OpenAI in private valuation.

Anthropic confidentially submitted a draft registration statement on Form S-1 to the SEC for a proposed initial public offering of our common stock. This gives us the option to go public after the SEC completes its review, the company stated.

IPO details

  • Target valuation: ~$965 billion
  • Prior round: $65 billion Series H
  • Share count: Not yet determined
  • Price: Not yet determined
  • Timeline: Dependent on SEC review and market conditions
  • Status: Confidential S-1 (Rule 135 of Securities Act)

The race with OpenAI

Anthropic's IPO intensifies the competition between the world's two largest AI companies. While OpenAI is seeking $40 billion in a new round at a ~$300 billion valuation, Anthropic already commands a higher private valuation and is racing to go public first.

The timing is significant: Anthropic, once seen as the runner-up in the AI market, now surpasses its rival in valuation and could become the first major native AI company to go public.

What to expect

  • The confidential S-1 allows Anthropic to keep financial details private until the public launch
  • The company will need to navigate regulatory scrutiny over AI safety
  • The IPO could be one of the largest tech offerings of 2026
  • A successful Anthropic IPO could further validate the generative AI sector

Implications: If realized, Anthropic's IPO will be a historic milestone for the AI industry — validating not only the company's business model but also demonstrating that AI safety can be a competitive advantage valued by the market.

Source: Anthropic Blog