Amazon, Tech Giants, and Venture Capitalists Set for Historic Windfalls in Anthropic’s Blockbuster IPO

Many investors stand to win big when artificial intelligence pioneer Anthropic goes public. Massive stakes held by venture capital heavyweights including Menlo Ventures, Sequoia Capital, Sound Ventures, and Spark Capital are expected to return billions of dollars to their respective funds and limited partners, marking one of the most lucrative chapters in the history of startup investing.

Yet according to Anthropic’s recently filed S-1 registration statement with the U.S. Securities and Exchange Commission, none of those prominent venture capital firms owns 5% of the company, the traditional threshold required for inclusion in the principal stockholders’ table. That absence is highly unusual for a major initial public offering. In a typical technology IPO, lead venture investors hold double-digit-percentage stakes in the startups they backed through their earliest and riskiest stages of growth.

The primary reason for this statistical anomaly is Anthropic’s unprecedented sheer size. At its towering $965 billion private valuation, a single 1% stake in the artificial intelligence enterprise is worth nearly $10 billion. Consequently, Menlo Ventures’ roughly $14 billion position represents only about 1.5% of the company, according to recently reported figures. Other early and growth-stage backers find themselves in a similar mathematical reality, where billions of dollars in paper gains translate into surprisingly modest single-digit ownership percentages.

While traditional venture capital firms may lack sizable percentage stakes due to the astronomical expansion of the company’s valuation, Anthropic purposefully sold massive stakes to strategic partners—major corporations that operate simultaneously as its crucial business allies. Among them, retail and cloud computing giant Amazon is positioned to become the single largest financial beneficiary of the impending public listing.

Amazon first backed Anthropic in 2023 with a landmark commitment to invest up to $4 billion in the artificial intelligence startup. In the months and years that followed, Amazon steadily poured billions more into the enterprise to secure its position at the forefront of the generative AI boom. Instead of taking standard equity stock upfront, Amazon structured much of its early multi-billion-dollar investment in the form of convertible notes, a specific type of debt instrument that automatically converts into common shares upon the occurrence of a qualifying event like an IPO or corporate sale.

According to Anthropic’s S-1 filing, Amazon held convertible notes with a staggering $6.2 billion in principal outstanding as of June 30. That figure represents the entirety of Anthropic’s reported debt load. However, as Anthropic’s private valuation soared across successive, highly competitive funding rounds, the underlying shares that those notes will eventually convert into became vastly more valuable. Amazon’s own corporate financial filings valued its note holdings at an eye-watering $97.9 billion as of June 30.

As the market value of Amazon’s convertible notes surged into the tens of billions of dollars, Anthropic was required under accounting rules to record the growing value of what it owes on its corporate balance sheet. The company reported these massive adjustments on its income statement under the line item designated as the "change in fair value of convertible notes, derivative liabilities, and SAFEs." That single accounting line totaled $72.4 billion for the first half of 2026 alone. Crucially, this charge is entirely non-cash, meaning no actual money left Anthropic’s corporate treasury to finance the adjustment.

According to the S-1 documentation, Amazon’s convertible notes could theoretically convert into as many as 1.84 billion shares of stock. However, a contractual cap limits Amazon to owning no more than 12% of Anthropic’s "partially diluted" share count—a metric that accounts for certain unissued shares, such as employee stock options. Amazon retains the legal right to waive this cap if it chooses. Any notes that cannot immediately convert due to the restriction will remain outstanding and convert in subsequent quarters, subject to the exact same statutory and contractual limits.

The convertible notes, however, represent only a portion of Amazon’s sprawling financial involvement with the artificial intelligence lab. The technology giant further invested $10 billion in nonvoting preferred stock—a direct form of equity—during the second quarter, according to Amazon’s quarterly financial report for the period ending June 30. Amazon accomplished this by deploying $5 billion into each of Anthropic’s last two major funding rounds. Combined with the $8 billion it invested via convertible notes from 2023 through 2025, Amazon’s cumulative financial investment in Anthropic reaches approximately $18 billion.

Beyond its monumental stock gains upon completion of the public offering, Amazon is also positioned to continuously earn significant ongoing revenue from Anthropic. The artificial intelligence developer has committed to spend at least $110 billion on Amazon Web Services over the next ten years, cementing a deeply intertwined commercial relationship that bridges cloud infrastructure and cutting-edge model training.

Google, another foundational backer, is likewise set for a major financial windfall derived from both the impending stock market listing and its extensive cloud computing arrangements with Anthropic. The search giant held approximately 14% of Anthropic as of early last year, according to confidential court filings that were later reported by The New York Times. Google has continued to invest substantial sums since then, including a $10 billion injection in April.

While Google’s initial holdings were inevitably diluted in subsequent, massive funding rounds, PitchBook analyst Harrison Rolfes estimated in commentary provided to TechCrunch that Google’s current stake sits closer to 5.6%. Alongside its equity position, Google has also secured at least $114 billion in cloud computing commitments from Anthropic through the year 2033, ensuring a multi-decade revenue stream between the two technological powerhouses.

While the venture capital firms set for historic paydays have little practical reason to complain about owning fractions of a percent of a nearly trillion-dollar company, Anthropic’s S-1 filing makes it abundantly clear that the absolute biggest financial winners of the IPO may well be major tech conglomerates like Amazon. These corporations backed a would-be rival early in its lifecycle and now sell it the vast majority of the specialized computing power required to train and run its frontier models.

At the same time, the regulatory filing itself includes cautionary warnings for prospective public market investors. The S-1 explicitly notes that some of these same cloud providers actively build their own rival artificial intelligence models in-house and that their strategic corporate incentives may not always align with the long-term goals and safety frameworks of Anthropic.