Business Lawsuit trial

Elon Musk's Lawsuit Against OpenAI and Microsoft

Analysis based on 8 articles · First reported Mar 13, 2026 · Last updated Mar 18, 2026

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Market Impact

Direct

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Market Impact

The lawsuit could have a significant impact on the valuation of OpenAI and potentially Microsoft, depending on the outcome of the damages claim. It also highlights the ongoing debate about the commercialization of AI and the ethical considerations involved.

Artificial intelligence Software Technology

Event Summary

Elon Musk is suing OpenAI and Microsoft, alleging that OpenAI defrauded him by abandoning its nonprofit mission after he provided initial funding. The trial, presided over by US District Judge Yvonne Gonzalez Rogers, is scheduled to begin on April 28 in Oakland, California. Musk is seeking between $79 billion and $134 billion in damages. Key figures like Sam Altman, Greg Brockman, Ilya Sutskever, and possibly Satya Nadella will testify. The judge has made rulings on admissible evidence, including limiting questions about Musk's alleged ketamine use but allowing limited questioning about his attendance at Burning Man. The jury's damages determination will likely be advisory, and punitive damages are unlikely to be pursued.

Key Actions

95 Elon Musk sued for fraud OpenAI

90 Elon Musk sued for fraud Microsoft

85 OpenAI converted to for-profit structure

80 Microsoft invested $13 billion OpenAI

70 Yvonne Gonzalez Rogers ruled to limit questioning on ketamine use Elon Musk

60 Yvonne Gonzalez Rogers expressed skepticism about damages report C. Paul Wazzan

Entities Involved

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Elon Musk

Elon Musk is suing OpenAI and Microsoft for allegedly defrauding him by abandoning its nonprofit roots. He is seeking between $79 billion and $134 billion in damages. His credibility may be questioned during the trial regarding his alleged ketamine use.

Importance 95 Sentiment 0

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OpenAI

OpenAI is being sued by Elon Musk for allegedly defrauding him. The company has moved to a for-profit structure and denies Musk's allegations. Its co-founders, Sam Altman and Greg Brockman, will testify.

Importance 90 Sentiment -10

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Microsoft

Microsoft is a co-defendant in the lawsuit due to its $13 billion investment in OpenAI. The company denies Elon Musk's allegations and its CEO, Satya Nadella, is a possible witness.

Importance 80 Sentiment -5

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Sam Altman

Sam Altman, CEO of OpenAI, is a co-defendant in the lawsuit filed by Elon Musk. He will testify during the trial regarding the company's founding and its shift to a for-profit structure.

Importance 70 Sentiment 0

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Greg Brockman

Greg Brockman, a co-founder of OpenAI, is a co-defendant in the lawsuit. He will testify about the company's founding and its intentions regarding its nonprofit structure.

Importance 65 Sentiment 0

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Yvonne Gonzalez Rogers

Yvonne Gonzalez Rogers is the US District Judge overseeing the trial. She has made rulings on admissible evidence and testimony, including limiting questions about Elon Musk's ketamine use.

Importance 60 Sentiment 0

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C. Paul Wazzan

C. Paul Wazzan is a financial economist and Elon Musk's sole expert witness. He calculated that Musk could be entitled to between $79 billion and $134 billion in damages, though the judge expressed skepticism about his report.

Importance 50 Sentiment 0

+ 4 more entities View on Dashboard

Relationships

Sam Altman related ↔ OpenAI

Greg Brockman related ↔ OpenAI

Ilya Sutskever related ↔ OpenAI

Satya Nadella related ↔ Microsoft

Shivon Zilis related ↔ OpenAI

Shivon Zilis related ↔ Elon Musk

Elon Musk related ↔ OpenAI

Elon Musk related ↔ Sam Altman

Elon Musk related ↔ Microsoft

OpenAI related ↔ Microsoft

+ 1 more relationships View on Dashboard

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