VCs will make billions on Anthropic’s IPO, but Amazon is set to make much (much) more

When Anthropic files for its public listing, venture capital firms including Menlo Ventures, Sequoia, Sound Ventures, and Spark Capital are each expected to book multi-billion-dollar gains. Yet according to the company's S-1, none of those firms crosses the 5% ownership threshold required for inclusion in the principal stockholders' table — a rarity in tech IPO history, explained largely by Anthropic's near-$1 trillion private valuation compressing percentage stakes across the board.

The deeper story in the S-1 is who does own Anthropic in a meaningful way: Amazon.

**Amazon's Structural Dominance** Amazon first committed up to $4 billion to Anthropic in 2023, structuring much of that investment as convertible notes rather than outright equity. As of June 30, 2026, those notes carry $6.2 billion in principal — Anthropic's entire reported debt load. But because Anthropic's valuation soared through successive funding rounds, Amazon's own quarterly filings mark the fair value of those notes at $97.9 billion, a figure that reflects the enormous appreciation of the underlying shares they will convert into.

To account for that swelling obligation, Anthropic recorded a non-cash charge of $72.4 billion on its income statement for the first half of 2026 under the line item covering changes in fair value of convertible notes, derivative liabilities, and SAFEs. No cash left the company, but the accounting entry illustrates the scale of Amazon's embedded position.

The notes could convert into as many as 1.84 billion Anthropic shares, though a cap limits Amazon to 12% of the company's partially diluted share count — a limit Amazon can waive. Notes that cannot convert immediately will roll into later quarters under the same constraint.

Beyond the convertible structure, Amazon separately invested $10 billion in nonvoting preferred stock in the second quarter of 2026, placing $5 billion into each of Anthropic's two most recent funding rounds. Combined with earlier note investments, Amazon's total outlay reportedly reaches approximately $18 billion.

**The Cloud Commitment That Compounds the Stake** Financial ownership is only part of Amazon's position. Anthropic has committed to spend at least $110 billion on AWS over the next ten years — a revenue stream that will flow regardless of IPO timing or post-listing share price movements. For HR-technology vendors and enterprise teams selecting AI vendors, this figure signals that Anthropic's infrastructure future is tightly coupled to Amazon's cloud.

**Google's Parallel Position** Google is not a passive bystander. Court filings reported by The New York Times indicated Google held approximately 14% of Anthropic as of early 2025, though subsequent large funding rounds are estimated to have diluted that figure to roughly 5.6%, according to PitchBook analyst Harrison Rolfes. Google invested an additional $10 billion in April 2026. It has also secured at least $114 billion in cloud commitments from Anthropic through 2033 — a figure that slightly exceeds even Amazon's commitment.

The S-1 itself flags an inherent tension: both Amazon and Google develop competing AI foundation models, and their commercial interests will not always align with Anthropic's.

**Why HR Tech Leaders Should Pay Attention** For the HR technology ecosystem, Anthropic's IPO is more than a capital-markets event. Anthropic's Claude models are embedded in or evaluated for a widening range of workforce applications — from AI-assisted recruiting and skills intelligence to manager copilots and workforce analytics platforms. The S-1's disclosures confirm that the infrastructure layer beneath these tools is controlled in substantial part by Amazon and Google, both of which also field their own competing AI products. Procurement, vendor-risk, and build-vs-buy decisions in HR technology increasingly hinge on this concentrated AI supply chain — and the Anthropic IPO has just put its structure on the public record.