Wall Street increasingly views a potential Anthropic IPO as credible rather than speculative. Reports have cited a possible listing valued at as much as $2 trillion as early as October, following the artificial intelligence company’s confidential S-1 filing earlier this summer.
In May, Anthropic said its annualized revenue run rate had surpassed $47 billion, and the company later reported ARR of $65 billion in July. A $2 trillion market valuation would equal nearly 31 times that July ARR figure. An offering of that size would also exceed Space Exploration Technologies’ roughly $1.8 trillion June listing as the largest IPO on record.
Amazon (NASDAQ: AMZN) has become one of Anthropic’s most significant backers during the artificial intelligence boom. Examining the size and structure of Amazon’s stake helps clarify its potential effect on the company and its shareholders.
How Amazon Built Its Anthropic Position
Amazon Web Services formed a strategic partnership with Anthropic in September 2023. Under the agreement, AWS became Anthropic’s primary platform for training and serving Claude, its generative AI model. Amazon initially invested $1.25 billion as part of a broader $4 billion commitment and completed the remaining $2.75 billion tranche in March 2024. By then, Claude was available through Amazon Bedrock, and the companies had begun exploring custom silicon together.
Amazon expanded the relationship in November 2024 with another $4 billion investment. Although the company did not disclose Anthropic’s valuation as part of that transaction, private-market estimates placed the AI start-up at approximately $40 billion.
Anthropic’s valuation subsequently rose sharply. It was valued at $61.5 billion in March 2025 and $183 billion that September. Earlier this year, a Series G financing reportedly valued the company at $380 billion. Anthropic then raised $65 billion in Series H funding at a post-money valuation of $965 billion.
Before the Series H round, Amazon invested another $5 billion in Anthropic and retained the option to commit as much as $20 billion more if specified commercial milestones were met. In exchange, Anthropic pledged more than $100 billion in AWS spending over 10 years and demand for up to 5 gigawatts of computing capacity.
Amazon does not publicly disclose its exact ownership percentage in Anthropic. Based on the company’s filings, however, the position had a carrying value of $190.4 billion as of June 30, consisting of $97.9 billion in convertible notes and $92.5 billion in nonvoting preferred stock. Against Anthropic’s $965 billion valuation, that suggests an ownership interest of roughly 19.7%. The estimate remains subject to change until Anthropic’s public S-1 provides a detailed capitalization table.
What a $2 Trillion Anthropic IPO Could Mean for Amazon
A 19.7% ownership interest in a company valued at $2 trillion would be worth approximately $394 billion. That would be roughly 30 times Amazon’s current carrying value, before accounting for any portion of the additional $20 billion investment it may still make.
Amazon has already marked the Anthropic position well above its original cost. Consequently, a $2 trillion IPO valuation would not generate nearly $400 billion in entirely new unrealized gains. Instead, it would increase the position from its current carrying value of about $190 billion to roughly $394 billion, an incremental rise of approximately $204 billion.
The strategic value extends beyond the equity holding. Amazon gained a major cloud customer, a prominent showcase for its Trainium and Inferentia chips, and exposure to the model layer of generative AI. Anthropic’s long-term AWS commitment represents one part of the arrangement, while the potential appreciation of Amazon’s ownership stake provides another source of value.
Why Anthropic Matters to Amazon Investors
Anthropic is no longer an insignificant part of Amazon’s investment portfolio. The key questions are how much of a potential $2 trillion valuation is already reflected in Amazon’s share price and how much could still be recognized if the IPO proceeds at that level.
With Amazon’s market capitalization at approximately $2.8 trillion, a $394 billion Anthropic stake would represent about 14% of the company’s total value. In a hypothetical $10,000 Amazon investment, roughly $1,430 would correspond to the value attributed to Anthropic if public markets fully recognized the stake.
Amazon already carries the investment at $190.4 billion, equivalent to about 7% of its market value. Moving that stake to an estimated $394 billion would create an additional $204 billion in value, or roughly another 7% of Amazon’s total market capitalization.
If investors incorporated that increase dollar for dollar, a $10,000 Amazon position could gain about $740. A successful Anthropic listing therefore might add several hundred dollars of look-through value to a modest Amazon holding, in addition to the value already reflected through Amazon’s current carrying amount.
