Amazon to Reap Massive Gains from Anthropic IPO, Surpassing VCs
Venture firms are set for billions in Anthropic's IPO, but S-1 filings reveal Amazon will secure far greater returns through massive convertible notes.

Stock photo for illustration only, not from the actual event
- VC firms including Menlo Ventures and Sequoia are poised to make billions from Anthropic's upcoming IPO.
- Amazon holds tens of billions in convertible notes that could convert into as many as 1.84 billion shares.
- Amazon's total investment reaches about $18 billion alongside a massive AWS cloud spending commitment.
Anthropic's journey toward the public market is set to generate immense wealth for its early backers. Venture capital firms that invested early, such as Menlo Ventures, Sequoia, Sound Ventures, and Spark Capital, all expect multi-billion-dollar returns when the artificial intelligence pioneer lists its shares.
However, according to Anthropic's S-1 filing, none of those venture capital firms own 5%, the threshold required to appear in the principal stockholders' table. That absence is highly unusual for a major tech IPO, where lead investors typically hold double-digit percentage stakes. Anthropic's massive scale explains the anomaly: at a private valuation of $965 billion, a 1% stake is worth nearly $10 billion. For instance, Menlo's roughly $14 billion position represents only about 1.5% of the company, according to recent figures.

Stock photo for illustration only, not from the actual event
While venture firms hold modest percentage stakes, Anthropic sold substantial equity to strategic partners who also serve as business allies. Amazon stands out as single-handedly the largest financial beneficiary of the IPO. Amazon initially backed Anthropic in 2023 with a commitment to invest up to $4 billion, pouring billions more into the AI firm since then.
Rather than taking direct equity upfront, Amazon structured much of its investment through convertible notes, a debt instrument that converts into shares upon an IPO or sale. The S-1 filing shows that Amazon held notes with $6.2 billion in principal outstanding as of June 30, representing Anthropic's entire debt load. As Anthropic's valuation soared across funding rounds, the underlying shares became far more valuable, with Amazon's own filings valuing those note holdings at $97.9 billion as of June 30.
Convertible notes are widely favored in high-growth tech startups because they allow investors to provide crucial capital early on without forcing an immediate equity valuation. The debt automatically converts into shares at a later liquidity event, such as an IPO. In Anthropic's case, the unprecedented appreciation of these notes illustrates how massive valuation jumps can drastically reshape corporate balance sheets and future equity distribution.
Beyond the notes, Amazon invested an additional $10 billion in nonvoting preferred stock during the second quarter by contributing $5 billion across Anthropic's last two funding rounds. Combined with earlier backing, Amazon's total investment reaches approximately $18 billion. In addition to equity gains, Amazon will secure ongoing revenue through Anthropic's commitment to spend at least $110 billion on AWS over the next decade.
Google is similarly positioned for a major windfall from both equity appreciation and cloud computing agreements. Court filings cited by media reports indicate Google held about 14% of Anthropic early last year and has invested more since, including $10 billion in April. Although subsequent massive funding rounds diluted Google's position to an estimated 5.6%, according to PitchBook analyst Harrison Rolfes, the search giant has also secured at least $114 billion in cloud commitments through 2033.
Source: TechCrunch
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