Why Anthropic’s IPO Prospectus Is Missing So Many Key Figures

On Monday, Anthropic filed its long-awaited IPO prospectus. The document explains parts of the company’s business, plans, and risks before it becomes a publicly traded company. The filing, called an S-1, is hundreds of pages long, but some important information is missing, including certain financial figures.

“Claude has experienced the fastest enterprise adoption of any technology in history, as demonstrated by revenue growing from $0 at commercial launch in the first quarter of 2023 to $_____ for the three months ended September 30, 2026,” reads the first of dozens of examples where information has been left out.

It is fairly common for companies to hide certain details in their S-1 filings. Securities and Exchange Commission rules allow companies some flexibility to do this, especially when the information is considered “confidential.”

Even so, it is useful to understand exactly what companies choose to leave out. In Anthropic’s case, most of the missing details concern its financial results for the latest quarter, which ended in September, and lease agreements connected to its spending on computing resources. Experts expect the company to reveal many of these details before it goes public. But leaving them out for now may point to the uncertainty involved in investing in artificial intelligence, as companies try to secure enough computing power.

Anthropic did not respond to a request for comment.

Michael Dambra, a professor of accounting and law at the University at Buffalo School of Management, tells WIRED there are “practical reasons” why the company’s third-quarter numbers are missing. September 30 was only a few weeks ago, and “closing the books for a company of this size takes time.”

Companies can also face legal responsibility for incorrect statements in their registration documents. This gives them a strong reason not to publish numbers before they have been carefully checked, Dambra says. SEC rules require that “Anthropic would need to update the filing with third-quarter financials” if the company goes public any later than around mid-November, he says.

As for data center lease agreements, Erica Neuman, a professor of accounting at Youngstown State University, says it is “not unusual” for companies to hide confidential details in documents attached to their contracts. These details could include lease terms.

However, Neuman says it is important to examine whether Anthropic’s redactions make it impossible, or harder, for investors to understand the company’s financial commitments and whether those commitments could affect its cash flow.

Many of Anthropic’s financial commitments are related to computing resources, which the S-1 calls the “most significant operating cost in our business.” These resources are also a business risk for the company. Anthropic says it could face both a shortage of computing power and the risk of investing too much in it. (Parts of the AI industry have warned that shortages of computer chips could slow AI development.)

Anthropic’s prospectus focuses more on the risk of investing too much. It says the company needs to invest in computing resources ahead of demand, and these investments may look “irresponsibly large” at first.

Anthropic says it treats chips as “a single, fungible pool from multiple strategic partners,” including Amazon, Google, Nvidia, and AMD. In other words, it views the chips it gets from these partners as one shared supply that can be used across its business. The company says it has signed contracts “with an aggregate committed spend of more than $_____, substantially all of which is related to compute and infrastructure.” Some of these contracts are due to be completed before December 2030, while others may continue through 2045.

Although the prospectus discusses uncertainties around computing resources, including limits on available land and electricity, Patrick Moorhead, CEO and chief analyst at Moor Insights & Strategy, says investors need more information.

“It’s about characterizing the odds and impact individually across each of the areas. Anthropic owes investors more information, such as a probability of these individual issues, characterizing the percentage chance and the degree of the impact,” he tells WIRED. He says simply stating that something “could materially impact” the company is not enough.

Anthropic does give some striking estimates in the footnotes. Since December 31, 2025, it has started or changed leases for “compute and infrastructure” with total “future minimum payment obligations” of about $417 billion. Since June 30, it has added another $245 billion in future payments, all related to infrastructure agreements. It has also expanded “certain existing commercial agreements” that it says “have not yet been finalized.” These could add another $125 billion to $150 billion in future payments.

Anthropic says that including “short term” agreements with “minimum non-cancelable payments” adds another $21 billion. If the company goes ahead with all these agreements, it estimates that it will owe at least $808 billion in total.

Ben Bajarin, chief executive and a principal analyst at Creative Strategies who follows the chip industry, says this is probably only the first version of Anthropic’s prospectus. He expects an updated version to fill in many of the missing details.

Even though hiding information in S-1 filings is common, Dambra calls the practice “controversial.” Companies may say they are “protecting proprietary information,” but critics accuse them of using redactions “opportunistically” to “avoid disclosing politically or socially sensitive information,” he says.

Dambra also says that hiding information can have a cost. He points out that companies that leave information out of their S-1 filings have been more likely to set their shares at a price below what the market would later support when they first sell shares to the public.

When companies hide information in their S-1 filings, Dambra says, they usually know they have created an “information gap” between themselves and outside investors. Because they understand that investors may view this missing information with “suspicion,” companies may try to persuade investors to take part in the IPO by setting a lower starting share price.

It is not clear what Anthropic’s starting share price will be or how investors will understand the missing information in its S-1 filing. But Bajarin says that, when it comes to working out the numbers based on access to chips and infrastructure, the entire AI industry is still in one form of “blank” or another. So there is a real risk.

“All of this,” he says, “just shows how absurdly early we are in enterprise adoption of an AI market that will be more than $3 trillion yearly and likely growing.”