Full Breakdown
Elon Musk vs. OpenAI: Trial Over Charitable Trust and Unjust Enrichment
4/25/2026, 11:10:48 AM
Trial Set for Oakland: Core Allegations
A U.S. District Court in Oakland, California, will hear Elon Musk’s lawsuit against OpenAI, Sam Altman, and co-founder Greg Brockman. After Judge Yvonne Gonzalez Rogers dismissed fraud claims on April 24 2026, the case proceeds on breach of charitable trust and unjust enrichment. Musk seeks up to $150 billion in damages, to be paid to OpenAI’s nonprofit arm.
Origins of the Dispute
Musk co-founded OpenAI in 2015 and left its board in 2018. In 2019 OpenAI created a for-profit subsidiary, a step Musk alleges violated the original nonprofit charter. The shift preceded Musk’s launch of the competing AI firm xAI in 2023.
Principal Actors
- Elon Musk – CEO of Tesla, SpaceX, and xAI; plaintiff.
- Sam Altman – CEO of OpenAI; defendant.
- Greg Brockman – OpenAI co-founder; defendant.
- Microsoft Corp. – Major OpenAI investor; co-defendant.
- Judge Yvonne Gonzalez Rogers – Presiding federal judge.
- Legal scholars – Sam Brunson (Loyola), Peter Molk (University of Florida), Deven Desai (Georgia Tech).
Timeline of Legal Actions
- 2015 – OpenAI founded by Musk, Altman, others.
- 2018 – Musk departs OpenAI board.
- 2019 – OpenAI establishes for-profit arm.
- 2024 – Musk files four lawsuits; two dismissed, two remain.
- April 24 2026 – Fraud claims dismissed; trial scheduled.
- April 27 2026 – Jury selection begins.
- April 28 2026 – Opening arguments.
- Mid-May 2026 – Liability phase concludes; remedies phase set for May 18.
Financial Stakes and Claims
Musk’s complaint originally listed 26 claims; four survived to trial (breach of charitable trust, unjust enrichment, fraud, constructive fraud). Reported damages range from $134 billion to $150 billion. OpenAI’s prospective IPO could value the company at roughly $1 trillion.
Official Positions
Musk argues OpenAI broke its founding promise, misled investors, and enriched its executives, demanding restitution to the nonprofit and removal of Altman and Brockman. OpenAI contends Musk is using litigation to gain competitive advantage for xAI, asserts lack of standing, and cites Musk’s withdrawal of pledged funding as justification for its for-profit restructuring. Microsoft maintains its investment does not constitute wrongdoing.
Critiques from Legal Scholars
Sam Brunson characterizes the trial as “only ended up … because Elon Musk can pay his attorneys to argue a losing case.” Peter Molk notes that Musk’s departure “doesn’t mean you can break any agreement we have.” Deven Desai warns that court documents “will make it harder … for OpenAI to keep claiming that’s what it’s about” and suggests the suit may be aimed at undermining Altman’s leadership ahead of the IPO.
Conflicting Figures and Gaps
Sources differ on the exact damages sought ($134 billion vs. $150 billion) and on the number of surviving claims (four versus a broader set of 26). The status of fraud allegations varies: some reports state they were dismissed by the judge, others note Musk voluntarily dropped them to streamline the case.
Verbatim Quotes
- “only ended up at trial because Elon Musk can pay his attorneys to argue a losing case,” — Sam Brunson, professor of law, Loyola University Chicago
- “If I were doing this on contingency, I’d assume I wouldn’t be getting paid.” — Sam Brunson
- “This suit is the latest move in Elon Musk’s increasingly blusterous campaign to harass OpenAI for his own competitive advantage,” — OpenAI filing
- “Since launching a competing artificial intelligence company, xAI, Musk has been trying to leverage the judicial system for an edge. The effort should fail.” — OpenAI filing
- “The court documents and testimonies will make it harder and harder for OpenAI to keep claiming that’s what it’s about.” — Deven Desai, professor of business law and ethics, Georgia Institute of Technology
- “My walking away doesn’t mean you can break any agreement we have,” — Peter Molk, professor of law, University of Florida
Implications for OpenAI’s IPO and the AI Sector
The trial’s outcome could dictate whether OpenAI must revert to a pure nonprofit model, alter its governance, or face financial penalties, all of which would affect investor confidence ahead of a projected $1 trillion IPO. A ruling against OpenAI may also reshape competitive dynamics between OpenAI, xAI, and other AI firms by clarifying the permissible scope of for-profit activities within entities originally chartered as nonprofit research labs.
Next Steps in the Litigation
The liability phase, involving nine jurors, will run through mid-May. Judge Rogers will then decide damages and any structural remedies in a separate phase beginning May 18. Both parties have allocated roughly 20 hours of trial time, and testimony is expected from Musk, Altman, Brockman, and Microsoft CEO Satya Nadella. The court’s final rulings will determine whether OpenAI proceeds with its IPO as planned or must restructure its corporate form.
