Musk v Altman trial opens in California with OpenAI’s structure on the line

TL;DR:

• A federal trial in Oakland began Monday with Elon Musk accusing Sam Altman, Greg Brockman and Microsoft of breaching the founding agreement of OpenAI by converting it to a for-profit entity.
• Musk is seeking removal of Altman and Brockman, more than $134bn in damages directed to OpenAI’s non-profit arm, and a reversal of the corporate restructuring.
• The case lands weeks before OpenAI’s planned ~$1tn IPO, with material implications for UK enterprises whose AI-vendor strategies and Microsoft Azure deployments depend on the company’s continued structure.

Jury selection began on Monday at a federal courthouse in Oakland in Musk v Altman, the long-trailed lawsuit that pits Tesla and X owner Elon Musk against OpenAI chief executive Sam Altman, president Greg Brockman and Microsoft. Judge Yvonne Gonzalez Rogers told prospective jurors the case “won’t get technical at all” and is, at its core, about “promises and breaches of promises”. Altman and Brockman attended; Musk did not.

The remaining claims — breach of charitable trust and unjust enrichment — accuse Altman and OpenAI of soliciting Musk’s roughly $38m of early funding under a non-profit, safety-focused remit and then “flipping the narrative” once the technology had advanced, monetising it through the Microsoft partnership and a for-profit affiliate. Musk dropped fraud claims on Friday. OpenAI rejects the allegations, saying Musk himself agreed in 2017 that a for-profit arm was needed and that his contributions were tax-deductible donations rather than equity.

What is at stake

Musk is asking for the removal of Altman and Brockman, more than $134bn in damages — which he says would be redirected to OpenAI’s non-profit foundation — and a reversal of the company’s 2025 restructuring into a for-profit corporation overseen by the original non-profit. The trial is scheduled to last about three weeks, with Musk, Altman and Microsoft chief executive Satya Nadella all expected to testify.

The timing is awkward for OpenAI. The company is preparing for an IPO at roughly a $1tn valuation later this year, and only this Monday announced a separate restructuring of its Microsoft pact that ends Microsoft’s exclusive distribution rights and lets OpenAI sell directly through Amazon and Google Cloud. A judgment that unwinds the for-profit conversion would touch every commercial commitment OpenAI has made since 2023, including its $250bn Azure spend and its growing list of cloud, chip and consumer-device partnerships.

Why UK readers should watch

For UK enterprises, the case is more than a Silicon Valley spectacle. A material share of UK financial services, professional services and public-sector AI deployments — including those running through Microsoft 365 Copilot or via the newly opened AWS distribution route — sit on top of OpenAI models. Any structural ruling that delays the IPO, restricts the for-profit arm’s ability to raise capital, or revisits the legitimacy of past contracts would feed directly into UK procurement risk and vendor-due-diligence reviews. UK boards relying on a single OpenAI-backed stack should treat the next three weeks as a reminder to map dependencies and check that contingency vendors — Anthropic, Google, open-weight models — are real options, not paper ones.

Looking forward

Opening statements were due on Tuesday. Beyond the headline damages, the more consequential signal will be how Judge Gonzalez Rogers treats the original non-profit charter as a binding constraint on the company’s commercial behaviour. That question — whether AI labs founded under public-interest banners can later convert into trillion-dollar private firms — will outlast this case and shape regulator and investor scrutiny on both sides of the Atlantic.