Amazon’s Anthropic investment could be worth $272 billion at IPO

Amazon recorded $92.5 billion for its Anthropic nonvoting preferred stock and an estimated fair value of $146.2 billion for its convertible notes at September 30. Together, that was $238.7 billion before the IPO.

The prospective $271.8 billion value is $33.1 billion above those combined recorded amounts. That difference compares private-security accounting measurements at September 30 with a hypothetical valuation at the proposed IPO price. It does not establish the additional accounting gain Amazon would recognize when the offering closes.

Conversion also has limits. Anthropic’s prospectus lists $6.203 billion in outstanding Amazon notes that, without an ownership cap, could convert into about 1.84 billion nonvoting Class N shares. Amazon has elected to retain its 12% cap for the offering. The cap uses a capitalization measure that includes shares underlying equity awards and other convertible securities.

The principal that cannot convert within the cap remains in non-interest-bearing rollover notes. Further conversions can occur at subsequent quarter ends, subject to the cap, which Amazon may waive. The final offering size and capitalization will determine the immediate conversion. Amazon also expects a customary IPO lock-up, followed by continuing securities-law restrictions on sales.

Economic exposure does not confer equivalent voting power. Anthropic is a Delaware public benefit corporation, required to balance shareholder interests with responsible AI development for humanity’s long-term benefit and the interests of people materially affected by its conduct. Its Long-Term Benefit Trust, intended to be an independent body of financially disinterested trustees, generally has authority to elect and remove a majority of authorized board members. A separate share class to be held by an entity owned by the co-founders will carry 50.1% of the general stockholder vote. Amazon’s shares are nonvoting.

An AWS Trainium2 chip. Amazon and Anthropic collaborate on Trainium hardware and software used to train and run Claude. Image: Amazon. Source: Amazon strategic collaboration announcement.

Financing and computing supply reinforce each other

The relationship was already established well before the IPO. In its November 2024 partnership announcement, Anthropic named AWS its primary cloud and training partner and said a new $4 billion investment would bring Amazon’s total investment to $8 billion. It also described engineers working with AWS’s Annapurna Labs on Trainium, Amazon’s custom AI chips, and the software needed to use them.

Amazon said in its April 2026 expansion announcement that more than 100,000 customers ran Claude models on AWS. It said Anthropic was already training and deploying Claude on Project Rainier, a cluster with nearly half a million Trainium2 chips. The expanded agreement envisaged access to up to five gigawatts of capacity; that figure describes planned access, rather than capacity already delivered.

Anthropic’s prospectus discloses a commitment to spend at least $110 billion with Amazon from May 2026 through April 2036, regardless of actual usage. A shortfall generally requires payment of the difference, subject to adjustments and exceptions. Anthropic cannot cancel except for Amazon’s uncured material breach.

A further $15 billion Amazon financing facility becomes available in $5 billion increments as specified computing-capacity milestones are reached. Those future funds are separate from the $18 billion already invested. Amazon’s quarterly filing also records contractual obligations related to the performance of its chips: the arrangement ties financing to infrastructure delivery as well as tying Anthropic to spending.

Long commitments can address an immediate constraint. Anthropic says customer demand has exceeded available computing capacity. It says $5 billion of compute delivered under short-term commitments in the third quarter cost significantly more than comparable capacity under multi-year commitments, reducing revenue per dollar of compute from the preceding quarter. The contracts reserve future supply, while exposing Anthropic to payments even if usage disappoints.

Amazon is a major partner among competing suppliers

Google, part of Alphabet and another cloud supplier, could have an interest worth $139 billion at $78 a share, according to the same filing-based calculations. Together, the two companies’ prospective interests would total roughly $411 billion.

The investment bases differ. Google’s $33.3 billion investment figure includes a planned $10 billion purchase in the private placement accompanying the IPO. Chipmaker Nvidia has also agreed to buy $10 billion of shares in that placement. The prospectus says the $26 billion placement across seven technology companies would close immediately after the public offering, subject to conditions, and issue nonvoting Class N shares at the IPO price.

Anthropic also has substantial minimum spending agreements with other cloud providers. The prospectus gives these amounts and periods; they cover different agreements and durations and do not establish comparable unit prices:

Claude is distributed through AWS, Google Cloud and Microsoft Azure. Anthropic says it maintains direct customer contracts, sets pricing and pays cloud distribution partners a fee. It trains and serves Claude across Amazon Trainium, Google TPUs, Nvidia GPUs and AMD GPUs, giving it alternatives to a single chip supplier. Amazon, meanwhile, separately invested $50 billion in rival AI developer OpenAI, according to its quarterly filing.

These overlapping roles raise competition questions. A January 2025 staff study by the Federal Trade Commission, the U.S. competition and consumer-protection agency, examined Amazon–Anthropic alongside Alphabet–Anthropic and Microsoft–OpenAI. It identified commitments to spend substantial portions of cloud partners’ investments on their services and flagged potential switching costs and access to sensitive business information. The study used information available through January 2025; it was not a finding on the proposed IPO or the subsequent contracts.

Company-reported revenue and compute and infrastructure expenses for the nine months ended September 30. Expenses include research, model development and internal workloads as well as customer-serving computing; the gap is not operating profit. Source: Anthropic SEC registration statement.

The next test is delivery and demand after pricing

Final pricing and capitalization will determine how much of Amazon’s investment converts immediately. Lock-up restrictions and the eventual trading price will shape its opportunities to realize that value.

The operating business supporting the valuation has expanded sharply. Anthropic’s financial disclosures show $33.242 billion in revenue for the nine months ended September 30, 2026, against $2.545 billion a year earlier—about 13.1 times as much. Its operating loss narrowed to $1.260 billion from $5.224 billion over the same periods; the earlier loss included a $1.5 billion litigation settlement charge. Compute and infrastructure expenses rose to $18.808 billion from $4.381 billion. Those expenses cover research, model development, customer-serving and internal workloads, so they are not simply the cost of serving paying customers.

Its $104.039 billion net loss included $94.324 billion in fair-value changes on convertible notes, derivative liabilities and other financing instruments. That loss is not a measure of operating cash consumption. Anthropic generated $6.6 billion in operating cash flow during the nine months and held $95.6 billion in cash and cash equivalents plus $36.3 billion in short-term investments at September 30, before IPO proceeds.

The prospectus puts aggregate committed spending under purchase commitments and lease agreements, including arrangements entered into after September 30, at approximately $900.9 billion, substantially all for computing and infrastructure. The commitments span many years, with substantially all spending after 2030 expected by 2045. About $70.7 billion was expected to be paid in the 12 months following September 30, 2026, including $4.2 billion tied to arrangements with contingent conditions or termination rights before commencement.

The evidence to watch after pricing is whether suppliers deliver capacity on schedule and whether customer usage supports the spending as it comes due. Those results will bear on both the value of Amazon’s securities and the cloud revenue promised by the partnership.

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