What Anthropic's listing papers really show

Anthropic, the company behind Claude, filed its S-1 on 26 October 2026. It is the first full look at its accounts. Read quickly, the numbers look alarming: a loss of $80.7 billion in the first 6 months of 2026. Read closely, they tell a different story, about paper losses, huge compute bills and a share count that is set to grow 7 times.

Anthropic's $80.7 billion loss is mostly on paper

Anthropic's January to June 2026 results line by line, in $ billion: revenue 16.3, costs minus 17.0, operating loss minus 0.7, interest earned 1.1, notes marked up minus 72.4, other mark-ups minus 8.8, net loss minus 80.7. The 2 paper mark-ups make almost all of the loss.

The strange part is that the better Anthropic does, the bigger this loss gets. Some of its lenders are paid back in shares, through convertible notes. Every rise in Anthropic's value makes those shares worth more, and the accounts book the rise as a cost. In January to June 2026 that cost was $72.4 billion, and similar deals with Google and Amazon added $8.8 billion more. No cash left the company.

The business itself lost only $0.7 billion, and the $1.1 billion it earned on its cash more than covered that.

Amazon's $6.2 billion loan is now worth $108.6 billion

What Anthropic owed on Amazon's notes on 30 June 2026, in $ billion: 6.2 lent, 102.4 gained since, 108.6 in all.

Most of that paper loss is Amazon's gain. In 2023 and 2024, Amazon lent Anthropic $6.2 billion that turns into shares at $2.09 and $5.05 each. In May and June 2026, new investors paid $589.01 for a preferred share that converts into 10 ordinary shares, or $58.90 a share.

So on 30 June 2026, Anthropic carried the loan at $108.6 billion, about 17.5 times what Amazon put in. Turned into shares, it would be about 12% of the company, the most Amazon may hold unless it waives the cap. Amazon is also Anthropic's cloud supplier and sells AI of its own.

85% of Anthropic's $133 billion of losses is on paper

All of Anthropic's losses from 2021 to 30 June 2026, in $ billion: 113.2 from notes marked up, 19.7 from running the business.

Add up every loss since Anthropic began in 2021 and the total is $132.9 billion. Of that, $113.2 billion is the same paper effect. Strip it out and the real cost of building Anthropic so far is $19.7 billion, about the $20 billion it raised from investors in 2025 alone. For a company of this size, the real burn has been small.

Anthropic's revenue passed its compute bill in 2026

Anthropic's revenue and compute costs each quarter, in $ billion. Revenue rose from 0.4 in January to March 2025 to 11.6 in April to June 2026; compute rose from 0.9 to 5.6. Revenue passed compute in January to March 2026.

Compute, the chips and data centres that run Claude, is Anthropic's biggest cost. It books that capacity 12 to 18 months before it arrives, so the bill climbs in steps, whatever demand does. Revenue grew from $376 million in January to March 2025 to $11.6 billion in April to June 2026, and compute fell from 251% of revenue to 48%.

So profit swings with when new compute is delivered, not with demand. Anthropic itself warns that its margins may shrink each time a big batch of new compute arrives.

SpaceXAI alone will cost 1.7x Anthropic's Q2 compute

A month of Anthropic's revenue and compute, in $ billion: revenue 3.85 and all compute 1.85 a month in April to June 2026, against 3.10 a month for the SpaceXAI deal alone from December 2026.

April to June 2026 was the first quarter Anthropic made an operating profit, $1.0 billion. It may be a high point. Once its deal with SpaceXAI, the AI arm of SpaceX, is fully running in December 2026, it will cost about $3.1 billion a month on its own. That is 1.7 times what Anthropic spent each month on all its compute in that quarter.

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