When Anthropic gears up to go public, its early backers—including Menlo Ventures, Sequoia, Sound Ventures, and Spark Capital—are expected to capture gains in the billions. But the single largest winner could be Amazon, thanks to its early and expansive financial bet on the AI startup.
Biggest Stakes Belong to Strategic Partners, Not VCs
Despite its high profile, none of Anthropic’s venture capital investors hold enough shares—5% or more—to appear in the S-1’s principal stockholder table. That’s unusual for a tech IPO, where lead VCs often control double-digit ownership. Still, thanks to Anthropic’s private valuation of $965 billion, even a 1% stake translates into nearly $10 billion in value. For example, Menlo Ventures’s $14 billion position works out to about 1.5% of the company.
Amazon’s Massive Long Game
Amazon’s exposure comes via two major vehicles. First are convertible notes—debt that transforms into shares when Anthropic IPOs or is sold. As of June 30, Amazon holds $6.2 billion in these notes, which make up Anthropic’s total debt. But boosted valuation has inflated their worth: the notes alone were valued in Amazon’s filings at about $97.9 billion.
Second, Amazon has also wired money into preferred equity—specifically, scoring $10 billion of non‐voting preferred stock during Anthropic’s second quarter via $5 billion investments in two consecutive funding rounds. Combined with $8 billion invested between 2023−2025 in notes, Amazon’s total investment in the company comes to roughly $18 billion.
Other Major Players and Revenue Streams
Google is also primed for a significant upside. Once holding approximately 14% of Anthropic, its stake has likely dropped through dilution in later funding rounds—estimates now hover near 5.6%. Beyond its stake, Google has secured cloud compute commitments from Anthropic totaling at least $114 billion through 2033.
Anthropic itself is committed to spending no less than $110 billion on Amazon Web Services (AWS) over the next decade—meaning Amazon not only gains through ownership but also through ongoing infrastructure and cloud services revenue.
What This Means
While VCs will see major payouts from Anthropic’s IPO, their slices are smaller than typical because of the company’s steep valuation. The real surprise is how much early strategic partnerships—with Amazon especially—are profiting through carefully structured investments and multi-year cloud contracts.
The takeaway: these financial moves underscore a growing trend in AI startup funding where strategic investors, especially cloud providers, intentionally invest large sums in equity, debt, and contracts. Amazon effectively hedged its rivalry with Anthropic by becoming one of its biggest financial backers, setting itself up to dominate not just the future of Anthropic’s public valuation, but its revenue as well. Going forward, a key thing to watch is how governance and strategic control balance between Amazon and Anthropic, especially as Amazon options may be capped but still have room to expand—as well as how cloud providers will navigate their role when they’re both partners and competitors.
