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Microsoft's 27% stake in OpenAI is now worth $135 billion after a major partnership restructuring.
On October 28, 2025, Microsoft announced it now holds a 27% stake in OpenAI Group Public Benefit Corporation, valued at about $135 billion, following a major restructuring of their partnership.
The investment, initially made in 2019, was met with skepticism, including from Bill Gates, who warned CEO Satya Nadella it could be a total loss.
Despite early doubts, the collaboration has proven highly successful, with Microsoft securing exclusive rights to OpenAI’s intellectual property and Azure API access.
The announcement boosted Microsoft’s stock nearly 2%, reflecting strong market confidence in the alliance.
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La participación del 27% de Microsoft en OpenAI ahora vale 135 mil millones de dólares después de una importante reestructuración de la asociación.