What Anthropic’s S-1 says about growth, losses and founder stakes

Anthropic reported $16.3 billion in revenue for the first half of 2026, while posting a $693 million operating loss. Its 335-page S-1 filing also describes founder shareholdings and 93 pages of risks. Here is what the disclosures say and what they leave open.

What revenue did Anthropic report?

The S-1 reports $16.3 billion in revenue for the first half of 2026. That is 14x the revenue reported for the same period in 2025, according to the source account. The comparison describes past performance and does not, by itself, set out what revenue will be next.

What does the filing say about losses?

Anthropic reported a $693 million operating loss for the first half of 2026, down about two-thirds from the prior year, according to the source account. It also reported a net loss of $80 billion. The account attributes about 90% of that net loss to a change in the fair value of convertible notes, derivative liabilities and SAFEs; these are financing-related items named in the filing.

Does the S-1 forecast future revenue?

No second-half forecast appears in the source account’s description of the S-1. Reuters has reported that Anthropic could reach a $110 billion annualised revenue run rate by year-end, citing analysts who met with company executives. A run rate expresses revenue at an annual pace based on a particular point or period; here, the figure is a reported possibility, not a company forecast in the filing.

How much stock do the founders hold?

According to the S-1, each of Anthropic’s seven founders holds between 230,000 and 246,000 shares of Class A stock. The source account names Dario Amodei, Daniela Amodei, Tom Brown, Jack Clark, Jared Kaplan, Sam McCandlish and Christopher Olah among the co-founders. The available details give a share range for each founder but do not explain voting rights or provide a fuller ownership breakdown.

What risks does Anthropic identify?

Risk factors take up 93 pages of the filing, running from page 27 to page 120. Anthropic says slower revenue growth could limit its ability to fund frontier AI development and attract or retain talent. It also raises the challenge of servicing debt while covering operating costs.

The filing also discusses potential risks from AI models and agents. The source account reports that Anthropic says future models may meaningfully assist malicious actors pursuing dangerous weapons. This is a risk described by the company, not a claim that such assistance has already occurred.

The reported figures give readers a view of growth alongside ongoing losses. The source account does not detail how later revenue or costs may change. Further disclosures will clarify how the company describes its finances and the risks it has identified.