Anthropic Has Committed More Than $100 Billion to AWS, and Its Prospectus Could Reveal More Details About This Contract

Anthropic, the company behind the Claude artificial intelligence (AI) models, plans to publish its initial public offering (IPO) prospectus after Monday's Labor Day holiday, The Information reported late last month. A listing may follow as soon as late September or in October. Amazon (NASDAQ:AMZN) shareholders have a more specific reason than most to open the document when it lands.

On April 20, Anthropic committed to spend "more than $100 billion over the next ten years" with Amazon Web Services (AWS), Amazon's cloud computing segment. That promise is equal to about a fifth of AWS's backlog of contracted work, which reached about $496 billion in June.

Missed Nvidia in 2009? This Rare Signal Is Flashing Again. In 2009, a "Double Down" signal flashed for a little-known chipmaker called Nvidia. For the first time in years, that same "Total Conviction" signal is flashing for a company 1/100th the size of Nvidia. Continue »

In other words, Amazon has already told investors how much one of its biggest cloud customers intends to spend. What no Amazon filing can show is whether the customer's own finances support it. That's what the prospectus is for.

The contract is already in Amazon's filings

April's agreement covers up to 5 gigawatts of capacity on Amazon's own silicon -- Graviton processors and Trainium2 through Trainium4 AI chips, with an option on future generations.

Amazon's filings show what a deal that size does to the backlog. AWS's backlog (commitments in customer contracts with original terms longer than one year that haven't yet been recognized as revenue) had grown to about $496 billion by June 30. That was up from about $364 billion in March, and from $195 billion in the middle of 2025 -- growth of 154% year over year, including a $132 billion jump in a single quarter. And the Anthropic deal wasn't alone. The filing also discloses a $100 billion, eight-year expansion of AWS's existing $38 billion commitment from OpenAI, announced a quarter earlier.

Not only is AWS's contracted future far bigger than it was a year ago, but more of it also sits years away from becoming revenue. The weighted-average remaining life of the segment's long-term contracts stretched from 4.0 years to 6.4 years over those 12 months.

Of course, a backlog is signed work, not guaranteed revenue. Amazon says the amount and timing of what it recognizes "will be driven by customer usage and our performance in accordance with contractual obligations."