AI · Musk v. Altman · May 18, 2026Verdict

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The Jury Took Less Than Two Hours — and Musk Lost Before They Reached the Merits.

The 30-second summary — May 18, 2026

The verdict. A nine-member federal advisory jury in Oakland deliberated less than two hours on Monday and unanimously found that Elon Musk’s claims against Sam Altman, Greg Brockman, OpenAI Inc., the OpenAI for-profit entities, and Microsoft were time-barred under the applicable statutes of limitations. Hon. Yvonne Gonzalez Rogers (N.D. Cal., Obama appointee, 2011) immediately adopted the advisory verdict as the court’s own finding and entered judgment for the defendants.

What the court did NOT decide. The court never reached the merits. Whether OpenAI breached its founding agreement, whether Altman and Brockman self-dealt, whether Microsoft aided and abetted — all of that is undecided on the record. Musk lost on the calendar, not the substance.

Musk’s own 2019 testimony was the kill shot. From the stand: “If you’ve got a capped-profit situation, it hasn’t violated the nonprofit’s goal. There was no basis for me to file a lawsuit at that time.” That sentence dated his knowledge of OpenAI’s for-profit shift to 2019 — five years before he filed in February 2024. The three-year breach-of-charitable-trust limitations period and the two-year unjust-enrichment limitations period both expired well before he sued.

OpenAI counsel William Savitt (Wachtell, Lipton, Rosen & Katz), on the courthouse steps: “It says: you brought your claims too late, and you did it because you were sitting on them to use them as a weapon of a competitor who can’t compete in the marketplace.”

Musk’s lawyer Marc Toberoff after verdict: “This one is not over. I can sum it up in one word: appeal.” The appeal will be to the Ninth Circuit.

The competitive subplot. Musk founded xAI in March 2023 — exactly the period he now says he discovered the alleged breach. Under direct examination April 30, 2026, Musk admitted xAI/Grok had been trained by distilling OpenAI’s models. Shivon Zilis’s Week 2 testimony added that Musk had tried to poach Altman to xAI. Those facts are now in the trial record.

The donations number. Musk’s actual transfers to OpenAI through 2020: ~$38–44 million per court record — not the “$1 billion+” figure widely circulated in 2024 press, which conflated pledge with actual transfer.

Elon Musk lost his federal lawsuit against OpenAI on Monday, May 18, 2026, in U.S. District Court for the Northern District of California in Oakland. A nine-member advisory jury, after deliberations of less than two hours, unanimously found that Musk’s claims were time-barred under the applicable statutes of limitations. Presiding judge Yvonne Gonzalez Rogersimmediately adopted the advisory verdict as the court’s own finding and entered judgment for the defendants. The court never reached the merits.

The dispositive fact, per the jury’s finding, was the date Musk discovered (or should have discovered) the conduct he sued over. OpenAI’s defense argued the for-profit shift was visible by 2017 (when Musk himself proposed a for-profit subsidiary) and certainly by 2019 (capped-profit subsidiary launch + first $1B Microsoft investment). Musk testified at trial that he only “discovered” the breach in 2022 when Microsoft prepared its $10B round. The advisory jury did not believe him — in part because Musk himself, from the witness stand, said of the 2019 capped-profit structure: “If you’ve got a capped-profit situation, it hasn’t violated the nonprofit’s goal. There was no basis for me to file a lawsuit at that time.”

OpenAI’s lead trial counsel William Savitt(Wachtell, Lipton, Rosen & Katz) framed the outcome on the courthouse steps as a determination not just about timing but about motivation: “you brought your claims too late, and you did it because you were sitting on them to use them as a weapon of a competitor who can’t compete in the marketplace.” Musk’s lead counsel Marc Toberoff: “This one is not over. I can sum it up in one word: appeal.”

• Caption: Musk v. Altman, et al.
• Court: U.S. District Court for the Northern District of California (Oakland courthouse; jury trial).
• Docket: 4:24-cv-04722.
• Filing history: Filed February 29, 2024 in San Francisco County Superior Court; refiled in federal court August 5, 2024 after Musk voluntarily dismissed the state action.
• Judge: Hon. Yvonne Gonzalez Rogers (born Feb 1, 1965, Houston; Princeton BA ’87 cum laude; UT-Austin School of Law JD ’91). Federal appointment: nominated by President Obama May 4, 2011; Senate-confirmed 89-6 Nov 15, 2011. First Latina federal judge in the N.D. Cal.
• Trial length: approximately three weeks.
• Jury type: nine-member advisory jury.
• Deliberation: less than two hours.
• Claims that went to the jury: breach of charitable trust (3-year limitations period) and unjust enrichment (2-year limitations period).
• Claims dismissed earlier: false advertising and breach of fiduciary duty (Judge Gonzalez Rogers, May 1, 2025).
• Relief Musk had sought: disgorgement up to ~$150 billion (Local News Matters cites the demand at trial as $134B), removal of Altman and Brockman, dismantling of the for-profit entity.
• Microsoft outcome: aiding-and-abetting claim dismissed with the other claims.

“If you've got a capped-profit situation, it hasn't violated the nonprofit's goal. There was no basis for me to file a lawsuit at that time.”

Elon Musk — on the witness stand, Musk v. Altman, Oakland, May 2026 (testifying about 2019 events)

Statute-of-limitations defenses turn on what the plaintiff knew, and when. The above sentence — Musk’s own characterization of his 2019 position on OpenAI’s capped-profit structure — was the defense’s closing argument in a single sentence. If the capped-profit structure that existed in 2019 did not yet, in Musk’s own view at the time, “violate the nonprofit’s goal,” then either it did not yet violate the goal (no breach until later) or it did and Musk had reason to know it did. The first interpretation kills his fraud theory (no breach happened in 2019). The second kills his timeliness (he had reason to know more than three years before he filed). Both kill the case. The jury picked the second.

Other Musk testimony pulled from the trial record by MIT Technology Review: “I was not opposed to there being a small for-profit that provides funding to the nonprofit, as long as the tail didn’t wag the dog.” “This does seem like the opposite of open. OpenAI is essentially captured by Microsoft.” “I was disturbed to see OpenAI with a $20B valuation. This is a bait and switch.” “The for-profit is the tail wagging the dog.”

Musk founded xAIin March 2023 — exactly the period during which, in his trial testimony, he had not yet decided that OpenAI was “the opposite of open.” OpenAI’s defense theme throughout the trial was that the lawsuit functioned as a competitive weapon, not a charitable-trust enforcement action. Two pieces of testimony from the trial record made that theme operationally vivid:

• April 30, 2026 — Musk admitted xAI/Grok was trained by distilling OpenAI’s models. Distillation is the AI-training technique in which a smaller model learns by mimicking the outputs of a larger one. xAI did this by querying OpenAI’s API, capturing the responses, and using those responses to train Grok — with OpenAI’s commercial models as the implicit teacher. The admission is now in the trial record.
• Week 2 — Shivon Zilis’s testimony. The Neuralink executive (and mother to several of Musk’s children) testified that Musk had tried to poach Sam Altman to xAI. Recruiting your former co-founder to your competitor while suing him for stealing the original charity is, to put it mildly, an inconvenient fact pattern for a “betrayed by a fraudster” theory of the case.

“This one is not over. I can sum it up in one word: appeal.”

Marc Toberoff — Musk's lead trial counsel, after the verdict

Musk’s appeal goes to the U.S. Court of Appeals for the Ninth Circuit. The narrow legal question on appeal will be whether Judge Gonzalez Rogers properly adopted the advisory jury’s limitations finding — and whether the underlying calendar math was right. Statute-of-limitations questions on appellate review are not deferential: the Ninth Circuit reviews legal conclusions de novo. But the trial record now contains Musk’s own 2019 sworn statement that the capped-profit structure had not yet violated the nonprofit’s goal. That record is the boulder appellate counsel will need to roll up the hill.

Musk’s public X posts the evening of the verdict: “The judge & jury never actually ruled on the merits of the case, just on a calendar technicality.” “Altman & Brockman did in fact enrich themselves by stealing a charity.” “I will be filing an appeal with the Ninth Circuit, because creating a precedent to loot charities is incredibly destructive to charitable giving in America.”

The trial unfolded during a period in which Musk had left a prominent White House DOGE role in 2025; xAI had signed a Pentagon deal in February 2026 to deploy Grok inside DoD classified systems (Axios); and the Trump-administration Center for AI Standards and Innovation (CAISI)had signed pre-deployment evaluation agreements in May 2026 with Google DeepMind, Microsoft, and xAI — placing the same federal AI-safety regulator above all the parties to this lawsuit at the moment the verdict landed.

None of those overlapping facts altered the calendar. Musk’s 2024 filing was, by his own 2019 statement and by his own 2023 founding of a competing AI company, too late to litigate the 2015 founding agreement of OpenAI. The verdict is not a judgment about whether OpenAI honored its nonprofit mission. It is a judgment about whether Musk waited too long to sue if he believed it hadn’t. The jury said yes. The court agreed. Appeal pending.