Compute · the Ledger · Equity stake
OpenAI, SoftBank, Oracle and MGX announce Stargate, intending to invest $500B in US AI infrastructure over four years
Announced · announced 21 Jan 2025 · the week to 24 Jan 2025
- Size
- $500B
- Term
- 4 years
A stated intention ('intends to invest'), not a binding commitment; $100B to be deployed immediately.
The parties
- OpenAIcompany pageInvestor
- SoftBankInvestor
- Oraclecompany pageInvestor
- MGXInvestor
The source
OpenAI announcement, 2025-01-21Company press release
Equity funders SoftBank, OpenAI, Oracle and MGX; SoftBank has financial responsibility, OpenAI operational responsibility. Technology partners Arm, Microsoft, Nvidia, Oracle, OpenAI.
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
- Amazon agrees to invest $50B in OpenAI: $15B in the current round plus a $35B commitment tied to milestones or an IPO$50B · 27 Feb 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