Anthropic Files for Record-Breaking Stock Offering

The cost of access to artificial intelligence infrastructure is shifting as one of the industry's largest private players prepares to sell shares to the public. Anthropic, the developer behind the Claude models, submitted final paperwork to the Securities and Exchange Commission on Monday. The filing signals an initial public offering that could raise hundreds of billions of dollars, placing the company in direct competition with other massive tech entities for investor capital.

The prospectus suggests a company valuation between $1.5 trillion and $2 trillion. That figure would place Anthropic alongside SpaceX, which listed in June with a valuation of approximately $1.8 trillion. The registration statement, known as a Form S-1, did not specify the number of shares up for sale or the price range. The ticker symbol for the upcoming listing is ANT.

Financial metrics in the filing show a rapid swing in performance. Revenue for the first half of the year reached $16.3 billion, a 1,300% increase from the prior year. Adjusted operating income hit $1.6 billion during that same period, reversing a loss of $1.8 billion seen in the first half of 2025. Despite this improvement, the company reported a net loss of nearly $81 billion for the six-month period, up from a $13 billion loss in the comparable period last year.

The move to public markets comes as the company faces operational and political headwinds. Anthropic was founded five years ago by Dario Amodei and a group of researchers who left OpenAI. The firm has since become the primary competitor to OpenAI in the large language model market. However, tensions have arisen with the U.S. Department of Defense over the use of the company's models in military applications.

In 2026, the Pentagon designated Anthropic a supply chain risk, a label typically reserved for entities linked to foreign adversaries. The Department of Defense took this action after Amodei opposed the use of the company's technology for autonomous weapons and mass surveillance of Americans. Anthropic is currently involved in two federal lawsuits challenging the designation. These legal battles remain ongoing as the company prepares for its public debut.

Market conditions for AI stocks have been volatile. Investors are weighing the potential economic benefits of the technology against the high costs of building data centers and the risk of overvaluation. CoreWeave, a data center provider, saw its stock price drop this month as bond yields rose. Major tech firms including Intel, Meta, and Nvidia have also seen share prices slide in recent weeks due to concerns about financing expansion while interest rates remain elevated.

Raj Joshi, senior vice president in the corporate finance group at Moody's, described the swing in Anthropic's adjusted operating income as a strong positive for the AI ecosystem. He noted that the transition from losses to positive adjusted income signals a shift in how investors view the sector's viability. Jim Angel, a markets specialist at Georgetown University, said that going public allows existing investors to cash out and provides the company with easier access to capital for growth.

Anthropic had a post-money valuation of $965 billion in its last private fundraising round in May. The company's prospectus included a statement claiming that AI will transform the global economy in ways comparable to industrialization and the internet. The filing also detailed risks, including the potential for models to develop faster than safety measures can be implemented and the possibility of political backlash against the company's regulatory stance.

The IPO could take place as early as November. OpenAI, which makes ChatGPT, has also planned a public offering but has paused those efforts. Sam Altman, the leader of OpenAI, described a listing this year as ill-advised given current safety concerns. Anthropic's entry into the public market will serve as a test of investor appetite for AI businesses at current price levels.