Anthropic files for a proposed IPO, with key terms undecided

Anthropic filed its Form S-1 registration statement with the SEC for a proposed IPO of Class A common stock.[1] The filing is dated October 26, 2026.[2] Anthropic intends to list the shares on the Nasdaq Global Select Market under the ticker ANT.[1] The company has not determined how many shares it will offer or the offering price range, and the preliminary prospectus leaves both the share amounts and estimated price range blank.[1][2] The securities cannot be sold before the registration statement becomes effective.[1]

The filing says both Anthropic and selling stockholders would sell shares in the offering, although their respective share amounts are blank in the preliminary prospectus.[2] Anthropic says it would receive no proceeds from Class A shares sold by selling stockholders.[2] The filing also says there had been no public market for Anthropic’s Class A stock before the offering.[2] For investors and financial teams assessing the proposed transaction, that means important inputs—including the price, total share count, and split between company and selling-stockholder shares—are not specified in the evidence available here.[1][2]

Anthropic says its public-benefit structure requires it to balance shareholder interests, the interests of people affected by its conduct, and its stated public-benefit purpose: responsible development and maintenance of advanced AI for humanity’s long-term benefit.[2] The company created a Long-Term Benefit Trust to help ensure it is managed in a way that balances its public-benefit goals.[2] Anthropic says the Trust is intended to operate independently and have financially disinterested trustees with expertise across several fields.[2] The filing says the Trust generally has authority to elect and remove Class T directors, who together would make up a majority of authorized board members.[2] Class T shares have no economic rights and generally do not vote on stockholder matters.[2]

CNBC’s description also said an OpenAI funding round could value the company at more than $1 trillion.[3] That is a reported potential valuation, not a confirmed transaction value in the evidence provided.[3] CNBC’s description said Kate Rooney would break down the week’s AI headlines, and a CNBC live-updates headline said Anthropic expects to spend at least $542 billion on data centers in coming years.[3][4] The available evidence does not provide further details on that spending headline or the OpenAI funding round, so professionals should treat them as separate reported items rather than completed transactions or settled figures.