Amazon’s Anthropic investment could eclipse venture capital IPO gains
Anthropic’s S-1 indicates that Amazon could be the largest financial beneficiary when the AI company goes public, even as venture firms including Menlo Ventures, Sequoia, Sound Ventures and Spark Capital are expected to make billions. At Anthropic’s $965 billion private valuation, however, even very large venture positions represent relatively small ownership percentages.
Amazon held $6.2 billion in convertible notes outstanding as of June 30, representing Anthropic’s entire debt load. Amazon valued those notes at $97.9 billion in its own filings. The structure means Amazon’s early investment may convert into equity at the IPO or in a sale, after Anthropic’s valuation rose sharply through later financing rounds.
Convertible notes create a large potential equity position
Anthropic reported $72.4 billion for the first half of 2026 under the income-statement line for changes in the fair value of convertible notes, derivative liabilities and SAFEs. The company described this as a non-cash charge: no cash left Anthropic, but the rising value of what it may owe noteholders had to be reflected in its accounts.
The notes could convert into as many as 1.84 billion shares. A cap limits Amazon to 12% of Anthropic’s partially diluted share count, which includes certain unissued shares such as stock options. Amazon can waive the cap. Notes that cannot convert because of the limit will remain outstanding and may convert in later quarters, subject to the same restriction.
Amazon’s exposure goes beyond the notes. Its quarterly report for the period ended June 30 said it invested $10 billion in non-voting preferred stock during the second quarter, split as $5 billion in each of Anthropic’s two latest funding rounds. Together with $8 billion invested in notes from 2023 through 2025, Amazon’s aggregate investment is about $18 billion.
Cloud spending adds a second commercial dimension
The relationship also gives Amazon a substantial infrastructure customer. Anthropic has committed to spend at least $110 billion on AWS over the next decade, extending the commercial significance of the investment beyond the value of shares. That commitment builds on Amazon investment and AWS commitment to Anthropic and ties Anthropic’s expansion directly to AWS demand.
Google also has a major interest in Anthropic. Court filings reported by The New York Times indicated that Google held about 14% of Anthropic early last year, although PitchBook analyst Harrison Rolfes estimated its current stake at closer to 5.6% after later large funding rounds. Google invested a further $10 billion in April and has at least $114 billion in Anthropic cloud commitments through 2033.
Strategic investors face both gains and tension
Anthropic’s filing highlights how its ownership differs from a conventional venture-backed IPO. Its scale means a 1% stake is worth nearly $10 billion at the stated private valuation; Bloomberg-reported figures put Menlo Ventures’ roughly $14 billion position at only about 1.5%. Strategic investors therefore combine potential listing gains with long-term cloud revenue.
The S-1 also cautions that some cloud providers build competing AI models and may not always share Anthropic’s interests. For businesses, the filing underlines the need to evaluate major AI partnerships across ownership terms, conversion limits, infrastructure commitments and the competitive roles of suppliers.