Anthropic’s S-1 Opens the Books Ahead of a Major IPO

Anthropic, the company behind Claude, filed public S-1 paperwork and said it plans to list on the Nasdaq under the ticker symbol ANT. The filing gives investors a detailed look at the company’s vision, financial results, major shareholders, and risks ahead of its IPO. Business Insider reported that Anthropic was valued at $965 billion in May, underscoring how closely Wall Street and AI experts are watching the deal.

Anthropic reported revenue of $4.6 billion and a net loss of about $42 billion in 2025. In the first six months of this year, revenue rose to $16.3 billion, while net loss reached $80.7 billion, which the company attributed in large part to an accounting adjustment. Its five biggest customers drove around 25% of revenue in the first nine months of the year, a growth engine that Anthropic also flagged as a potential risk if customers switch AI providers.

The filing shows how expensive it is to meet demand for Claude, coding, and workplace AI tools. Anthropic expects at least $265.6 billion in fixed or minimum-guaranteed cloud, computing, and infrastructure commitments through June 30, with additional agreements that could raise the total. Business Insider reported that Anthropic disclosed about $637 billion in compute and infrastructure spending with named companies over coming years, including arrangements involving Broadcom, Microsoft, Google, SpaceX, Amazon, Nscale, and Lambda.

Anthropic devoted more than 90 pages to risk factors, including the possibility that a “catastrophic AI-related incident” could cause damages beyond what the insurance industry could cover. The company warned that harmful incidents involving its models could damage its reputation as a safety-focused AI company, reduce demand, trigger legal claims, and draw regulatory scrutiny. It also said it may not detect or prevent every harmful use or output from its models.

The filing says CEO Dario Amodei received total compensation valued at nearly $18 million in 2025, while president Daniela Amodei received about $16.4 million. Dario Amodei’s package included about $2.7 million in personal security costs, and the largest portions of both executives’ packages were stock and options. Anthropic’s seven cofounders will retain majority voting control after the IPO through one Class F common stock share carrying 50.1% of shareholder votes.