Anthropic’s upcoming public offering is set to deliver multi‑billion dollar payouts to its early venture backers, yet the most lucrative outcome may belong to Amazon, the cloud giant that has woven deep financial and operational ties with the AI startup.
Venture capital returns
Investors such as Menlo Ventures, Sequoia, Sound Ventures and Spark Capital own stakes that, according to the company’s S‑1 filing, will translate into billions of dollars once the shares begin trading. None of these firms, however, hold a 5 percent stake—the threshold for inclusion in the principal stockholders table—making Anthropic’s capital structure unusual for a technology IPO.
At a private valuation of $965 billion, a 1 percent interest is worth roughly $10 billion. Bloomberg estimates Menlo’s position at about $14 billion, which equates to roughly 1.5 percent of the company. The other venture firms hold similarly modest percentage stakes, but the absolute dollar values remain sizable.
Amazon’s convertible‑note strategy
Amazon entered the Anthropic partnership in 2023 with a pledge to invest up to $4 billion. Since that initial commitment, the retailer‑turned‑cloud provider has added billions more, primarily through convertible notes rather than direct equity. The S‑1 indicates that as of June 30, Amazon’s notes total $6.2 billion in principal, representing Anthropic’s entire debt load.
Because the notes convert to equity at the time of an IPO or sale, their market value has surged alongside Anthropic’s rising valuation. Amazon’s own filings value the notes at $97.9 billion as of the same date. The conversion could yield as many as 1.84 billion Anthropic shares, though a cap limits Amazon to 12 percent of the company’s “partially diluted” share count. The cap can be waived, and any notes that cannot convert now may do so in later quarters under the same limitation.
The rapid appreciation of the notes forced Anthropic to record a non‑cash charge of $72.4 billion on its income statement for the first half of 2026 under the line “change in fair value of convertible notes, derivative liabilities, and SAFEs.” No cash left the company, but the accounting impact underscores the scale of Amazon’s exposure.
Beyond the notes, Amazon invested $10 billion in non‑voting preferred stock during the second quarter, allocating $5 billion to each of Anthropic’s two most recent funding rounds. Combined with the $8 billion of notes issued between 2023 and 2025, Amazon’s total commitment to Anthropic approaches $18 billion.
Anthropic has also promised to spend at least $110 billion on Amazon Web Services over the next decade, guaranteeing a long‑term revenue stream for the cloud provider.
Other strategic partners
Google, another major cloud competitor, held roughly 14 percent of Anthropic early last year, according to court filings reported by The New York Times. Subsequent funding rounds likely diluted that position; PitchBook analyst Harrison Rolfes estimates Google now controls about 5.6 percent after a $10 billion investment in April.
In parallel, Google secured cloud commitments worth at least $114 billion through 2033, positioning it to benefit from Anthropic’s growth alongside Amazon.
The S‑1 filing cautions that cloud providers such as Amazon and Google also develop rival AI models, suggesting that their interests may not always align with Anthropic’s. Nonetheless, the document makes clear that the financial upside for these tech giants dwarfs the payouts anticipated for the venture capital firms.
In sum, while VCs will likely see billions returned from the IPO, Amazon’s convertible‑note holdings, preferred‑stock investment and long‑term AWS contract position it to capture a substantially larger share of Anthropic’s future value.
Helene Elliott is the Lead Science & Space Reporter at News Raise. She reports on aerospace missions, astrophysics discoveries, quantum research, and environmental technology.
