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

What happened: Anthropic's S-1 shows its venture investors hold stakes below the 5% threshold for the principal stockholders' table, while Amazon is positioned as a major beneficiary through convertible notes and preferred stock. Key numbers: Private valuation $965 billion. Why it matters: The S-1 indicates the largest IPO winners may be tech giants like Amazon, which backed a would-be rival early and now supplies much of its computing power. The filing warns that some cloud providers also build rival AI models and may not always want the same things Anthropic does. Market: +1.6% today ($253.10), +11.7% YTD, 0.9x vol — as of 23:45 UTC Verified: Q3_2026 (Oct 29) revenue $203.9B vs $203.9B est; next print ~Jan 28 Coverage: 4 outlets in 24h

Anthropic's S-1 shows its venture investors hold stakes below the 5% threshold for the principal stockholders' table, while Amazon is positioned as a major beneficiary through convertible notes and preferred stock.

The S-1 indicates the largest IPO winners may be tech giants like Amazon, which backed a would-be rival early and now supplies much of its computing power. The filing warns that some cloud providers also build rival AI models and may not always want the same things Anthropic does. Market: +1.6% today ($253.10), +11.7% YTD, 0.9x vol — as of 23:45 UTC Verified: Q3_2026 (Oct 29) revenue $203.9B vs $203.9B est; next print ~Jan 28