OpenAI is giving its long-time backer Microsoft Corp. a 27% ownership stake as part of a restructuring plan that took nearly a year to negotiate, the company said in a blog post on Tuesday.
This move removes a major uncertainty for both companies and clears the path for the ChatGPT maker to become a for-profit business.
The partnership, which began in 2019 when OpenAI was a non-profit, has been revised. Under the new terms, Microsoft's rights to OpenAI's AI models are extended through 2032.
The new arrangement allows Microsoft to pursue artificial general intelligence (AGI) AI.
The announcement immediately impacted Microsoft's valuation, helping its market cap cross the $4 trillion mark for the second time.
We completed our recapitalization.
The non-profit, the OpenAI Foundation, is now one of the best resourced philanthropies ever, with equity valued at ~$130B. It continues to control the OpenAI for-profit, which is now a public benefit corporation.https://t.co/TevJDA3QwBOctober 28, 2025AdvertisementThe next chapter of the Microsoft–OpenAI partnership: https://t.co/9R5oXOl42m pic.twitter.com/zezQd9JmIu
October 28, 2025What Does This Mean?
The deal, which values OpenAI at a staggering $500 billion, is a clear signal that the company is moving forward with an aggressive for-profit strategy, despite being founded as a non-profit research group. The new Public Benefit Corporation structure allows OpenAI to pursue commercial growth and raise large amounts of capital, while its original non-profit foundation remains in control to ensure the company's mission of developing safe and beneficial AI remains the top priority.
For Microsoft, the 27% stake is estimated to be worth approximately $135 billion. This deepens its alliance with the AI leader. The new agreement also secures Microsoft's access to OpenAI's cutting-edge AI technology and models until at least 2032, extending the terms of their original partnership.
AdvertisementThe restructuring resolves major financial constraints that had previously limited OpenAI's ability to secure outside funding and computing resources. Although Microsoft is a major winner, the new terms also give OpenAI more flexibility. Crucially, Microsoft no longer holds the exclusive right to be OpenAI's sole cloud computing provider. However, OpenAI has committed to purchasing an additional $250 billion in Microsoft Azure cloud services in a massive new contract, reinforcing Azure as a core partner.
This development provides a clearer, more simplified path for OpenAI's future, potentially paving the way for a future public stock offering. For now, the arrangement balances the need for vast commercial resources to build the next generation of AI with the ethical oversight of its founding non-profit board.
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