Microsoft CEO Satya Nadella Testifies in Musk v. Altman Trial as $13 Billion OpenAI Investment Faces Scrutiny

Neutral (-0.2)Impact: High

Published on May 11, 2026 (2 hours ago) · By Vibe Trader

Microsoft CEO Satya Nadella testified in federal court in Oakland, California, as part of the Musk v. Altman trial, which scrutinizes Microsoft's $13 billion investment in OpenAI and the company's involvement in the AI firm's shift from a nonprofit to a for-profit structure [1]. The trial centers on Elon Musk's lawsuit against OpenAI, CEO Sam Altman, and president Greg Brockman, alleging they abandoned OpenAI's nonprofit mission and that Microsoft aided in this alleged breach of charitable trust [1].

Microsoft has been a significant backer of OpenAI since 2019, with investments including $1 billion in 2019, $2 billion in 2021, and $10 billion in 2023, totaling over $13 billion [1]. Musk testified that Microsoft's $10 billion investment was the 'key tipping point' that led him to believe OpenAI was violating its nonprofit mission, prompting him to initiate legal action [1]. Musk stated, 'I was concerned they were really trying to steal the charity' [1].

OpenAI's transition to a for-profit subsidiary after Musk's departure in 2018 enabled it to attract substantial outside funding, swelling its valuation to over $850 billion [1]. In October, OpenAI completed a recapitalization that maintained its nonprofit status while granting equity in its for-profit business. Microsoft disclosed it held a roughly 27% stake in OpenAI's for-profit unit, valued at around $135 billion [1].

The relationship between Microsoft and OpenAI has shown signs of strain in recent months, despite both companies continuing to describe their partnership as strategic and core to their businesses [1].

CONCLUSION

The Musk v. Altman trial has brought significant scrutiny to Microsoft's multi-billion dollar investment in OpenAI and the AI firm's shift to a for-profit model. With high-profile testimony and large financial stakes, the outcome could have major implications for the governance and funding of artificial intelligence ventures.

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