Microsoft Maintains 27% Stake in OpenAI as Companies Restructure $135 Billion AI Partnership

Oct 28, 2025 11:39 pm CST

Microsoft and OpenAI have restructured their landmark AI partnership, with Microsoft retaining a 27% stake valued at $135 billion while OpenAI transitions to a public benefit corporation. The new agreement provides both companies greater independence while maintaining collaboration through 2032, with OpenAI committing to $250 billion in Azure cloud services and gaining freedom to develop products with third parties.