Anthropic Says 5% to 7% of 2026 Revenue Came From Policy-Violating Customers, and a Founder-Held Share Carries 50.1% of Votes

Since Anthropic made its Form S-1 public on Monday, Oct. 26, with a possible Nasdaq debut under the ticker ANT the week of Nov. 16, the headline numbers have dominated. The smaller disclosures deserve more attention.

Revenue that may not recur

According to an analysis of the filing by Steven Waterhouse, who writes the AI Waves newsletter, Anthropic estimates that 5% to 7% of revenue in the first nine months of 2026 came from customers it later found violating its usage policy or commercial terms. Anthropic tightened enforcement in August and September and expects that share to fall, with some cost to growth, Waterhouse reports.

That is a company-supplied estimate. On first-half revenue of $16.3 billion, it is a meaningful slice.

The filing also gives a customer breakdown. Anthropic says it has more than 14,000 enterprise customers, about 250 of which each contribute $10 million or more in annual revenue. For the nine months ended Sept. 30, no single customer was more than 10% of revenue, and the top five were about 25%. A draft of the prospectus, as seen by the Wall Street Journal, showed about one-fifth of first-half revenue coming from just two customers. Anthropic warned that it expects to keep leaning on a limited number of customers.

Who controls the company

Public buyers would get economic exposure, not control. A special share held through an entity organized by Anthropic's seven co-founders carries 50.1% of voting power. The company's Long-Term Benefit Trust generally keeps the ability to appoint a board majority.

An investor can like the business and still dislike that arrangement. TradingView put it plainly: buying into the company means accepting an unusually concentrated governance structure.

The quarter that isn't there

The filing covers the first half of 2026. It does not include results for the quarter that ended Sept. 30, even though it uses nine-month customer data.

The Financial Times has reported third-quarter revenue of $16.8 billion. The filing neither confirms nor replaces that figure. The filing does show second-quarter revenue of $11.6 billion, up from $4.7 billion in the first quarter, according to Waterhouse's analysis.

The operating picture improved quickly within the half. The first-half operating loss narrowed to $693 million. Adjusted operating income was a positive $1.62 billion, though adjusted figures exclude certain expenses. Waterhouse reports that operating income turned positive at $974 million in the second quarter, and that compute cost fell from 251% of revenue in the first quarter of 2025 to 48% in the second quarter of 2026.

Those are Waterhouse's figures from his reading of the filing. Anthropic buys compute 12 to 18 months before delivery, so the cost follows the delivery schedule rather than quarterly demand.

Renting, not owning

Anthropic spent $482 million on property and equipment in the first half, against $8.9 billion of compute expense. The chips are rented from cloud providers and equipment lessors.

The providers are also a risk. Anthropic says Amazon Web Services, Google and Microsoft increasingly view it as a competitor and have limited the capacity they are willing to provide. It is building out data centers through long-term leases and third-party operators, some with limited operating history. It also warned that political opposition to data center construction could become more organized across jurisdictions.

The company's own filing cautions that its historical growth rates "are not indicative of future performance or our ability to sustain or forecast future revenue growth." It also warns its models might "behave in unintended, misaligned, and autonomous ways," and says it depends on advanced chip manufacturing in Taiwan.

The favorable read

Not everyone treats the filing as a warning label. Raj Joshi, a senior vice president in Moody's corporate finance group, called the swing in adjusted operating income from negative to positive "a strong positive for the AI ecosystem," in a statement to NPR.

Jacob Bourne, an analyst at Emarketer, said the decision to go ahead signals "a willingness to face heightened public scrutiny." On social media, investor commentary stressed that most of the $80.7 billion first-half net loss was a $72.4 billion accounting charge tied to the fair value of convertible notes and other financing instruments, not cash out the door.

What comes next

Anthropic has not set a share count or price range. Goldman Sachs and Morgan Stanley are leading the offering. The Wall Street Journal has reported a target of the week of Nov. 16, and the timing could change. Reported valuation talk runs from $1.5 trillion to $2 trillion, versus the $965 billion mark from its May round. The prospectus does not contain an IPO valuation.

The open items are the price range, the amount raised and whether Anthropic adds third-quarter results before it prices.