Amazon's Convertible Notes in Anthropic Reach $97.9 Billion Book Value
nashnova research
After Anthropic filed its S-1, Amazon's convertible-note position has swelled to a book value of $97.9 billion — locking in the dual role of largest shareholder and most important cloud supplier on a total investment of roughly $18 billion.
Where does the $97.9 billion book value come from?
Amazon holds convertible notes with a principal balance of $6.2 billion — Anthropic's entire debt.
As Anthropic's valuation climbed through successive funding rounds, the shares those notes convert into ballooned in value. As of June 30, 2026, Amazon marked the position at $97.9 billion.
This means → Amazon turned $6.2 billion in principal into nearly 16× the paper return. The convertible notes are the single most valuable piece of this deal.
What limits does the convertible carry?
The S-1 shows the notes can convert into a maximum of 1.84 billion shares, capping Amazon's stake at 12% of partially diluted equity.
Amazon may waive that cap. Any portion that cannot convert stays as debt and rolls into future quarters.
In plain terms = the cap works like a gate — Amazon can open it, but until it does, shares trickle in batch by batch. How Amazon handles this gate after the IPO prices is the key thing to watch.
How much has Amazon invested in total — and what else did it get?
Beyond the notes, Amazon put in an additional $10 billion in Q2 2026 for non-voting preferred stock, on top of the $8 billion deployed into convertibles from 2023 to 2025 — roughly $18 billion in total.
Separately, Anthropic has committed to spending at least $110 billion on AWS over the next decade.
This means → Amazon is not just a financial investor. It has locked in largest shareholder + top cloud supplier simultaneously — cloud revenue is secured regardless of how Anthropic's stock moves.
Where do Google and the VCs stand?
Google held about 14% of Anthropic in early 2025 and kept adding, investing another $10 billion in April this year. After multiple dilutive rounds, PitchBook analyst Harrison Rolfes estimates Google's current stake at roughly 5.6%. Google also secured a cloud commitment of at least $114 billion through 2033.
Prominent VCs — Menlo Ventures, Sequoia Capital, Sound Ventures, Spark Capital — all fell below the S-1's 5% major-shareholder disclosure threshold. At Anthropic's $96.5 billion private valuation, Menlo Ventures' roughly $14 billion position amounts to only about 1.5%.
This reflects a return-distribution logic dominated by Big Tech, not traditional venture capital — the players with the most money and the deepest lock-in take the largest share.
How does Anthropic itself view this structure?
The S-1 flags a risk: some cloud providers are simultaneously building competing AI models, and their interests may not always align with Anthropic's.
Because of the surging note valuation, Anthropic's H1 2026 income statement recorded $72.4 billion in non-cash charges under "fair-value changes in convertible notes, derivative liabilities, and SAFEs."
In plain terms = that $72.4 billion is not cash going out the door. It is a paper loss that accounting rules force Anthropic to book as the notes grow more valuable — no direct impact on cash flow, but it makes the financial statements look very rough.
市场有风险，内容仅供研究参考，不构成投资建议。