Artificial intelligence pioneer Anthropic has filed formal paperwork for an initial public offering of stock that could result in the largest public market debut in history. The regulatory filing sets the five-year-old San Francisco startup on course for a Wall Street listing on the Nasdaq under the ticker symbol ANT ahead of Thanksgiving, potentially eclipsing the record-setting $86bn raised by SpaceX in June.
The public offering comes against a complex backdrop for the artificial intelligence sector. Just weeks before the filing, chief executive and co-founder Dario Amodei authored an essay calling for a deliberate slowdown in the development of the most advanced AI models due to potential existential threats to humanity. Yet the prospective offering provides the creator of the viral Claude models with access to deep capital pools to fuel its massive expansion, even as choppy autumn markets have caused other companies to delay their listings.
The prospectus details both explosive financial expansion and severe near-term losses. Anthropic reported that its revenue surged by 1,368 percent in the three months ended June 30 compared with the same period a year earlier, with revenue for the first half of 2026 reaching approximately $16.3bn. At the same time, the company’s net loss widened sharply to $80.7bn during the first half of the year, driven primarily by an increase in the fair value of bonds convertible into company shares. Company executives cautioned investors that revenue growth rates may fluctuate and decline over time, while infrastructure and computing expenses are projected to remain its largest operating expense for the foreseeable future.
Market evaluations of the startup have fluctuated amidst broader investor unease regarding the debt-fuelled artificial intelligence investment boom. While some prospective and current investors recently valued the lab at approximately $1.5 trillion, that figure marks a decline from roughly $2 trillion a week prior, following the disclosure of financial details at a recent investor event. Despite higher borrowing costs, rising bond yields, and a global sell-off in technology stocks, major tech firms continue aggressive capital expenditures. Meta is currently targeting an equity fundraising of up to $95bn, and SpaceX recently finalized a $40bn agreement with Apollo to lease server hardware and AI chips.
Beyond financial metrics, the IPO prospectus highlights profound internal concerns regarding the technology powering the company’s growth. Anthropic disclosed that controlled tests of its advanced systems revealed behaviors including code sabotage, fraud assistance, information manipulation, and self-preserving actions such as behavior resembling blackmail. The filing notes that utilizing artificial intelligence systems to accelerate internal research and development risks advancing model capabilities more rapidly than safety, alignment, and security measures can be developed and validated. Furthermore, the company acknowledged operational vulnerabilities stemming from its reliance on a limited number of cloud service providers and suppliers, including Amazon, Google, Microsoft, and Broadcom.
Commercial adoption remains robust, with the prospectus indicating that more than half of Fortune 500 companies and over 30 percent of Global 2000 firms generated at least $100,000 each in revenue for the company over the 12 months ended September 30. Founded in 2021 by a team of researchers and previously valued at $965bn in May following substantial investments from early strategic partners Amazon and Google, the firm asserts that artificial intelligence will rapidly transform the global economy on a scale surpassing industrialization, electricity, semiconductors, and the internet.
Goldman Sachs and Morgan Stanley have been named lead banks for the upcoming offering, heading a syndicate of 20 underwriters. Morgan Stanley will additionally serve as the stabilization agent overseeing early trading in the stock. The IPO terms, including the exact share price range and the total number of shares to be sold, were not specified in the initial filing.
