Compute · the Ledger · Equity stake
Amazon agrees to invest $50B in OpenAI: $15B in the current round plus a $35B commitment tied to milestones or an IPO
Signed · announced 27 Feb 2026 · the week to 27 Feb 2026
- Size
- $50B
$15.0B of Series C preferred due 2026-03-31, plus a $35.0B equity commitment letter that lapses if not invested by 2028-12-31.
The parties
- Amazoncompany pageInvestor
- OpenAIcompany pageTook the investment
The source
Amazon 8-K, 2026-02-27Regulatory filing
Signed alongside the expanded AWS agreement (see openai-aws-expansion-2026-02).
The same parties, other deals
- Nvidia gives SB Energy residual value guaranties, capped at $105B, on ~4.25 GW of Ohio data center leases to OpenAI$105B · 17 Aug 2026
- Anthropic commits more than $100B over ten years to AWS for up to 5 GW; Amazon invests $5B now and up to $20B more$100B · 20 Apr 2026
- OpenAI expands its AWS agreement by $100B over eight years, including ~2 GW of Trainium capacity$100B · 27 Feb 2026
- OpenAI agrees to deploy 750 MW of Cerebras inference compute; Cerebras's S-1 values the deal at more than $20B$20B · 14 Jan 2026
- OpenAI signs a $38B, seven-year agreement for AWS capacity on Nvidia GB200 and GB300 GPUs$38B · 3 Nov 2025
- OpenAI recapitalizes; Microsoft's stake is ~27% (~$135B) and OpenAI contracts to buy an incremental $250B of Azure services$250B · 28 Oct 2025