Musk v. Altman OpenAI trial

The headline number that stunned courtroom observers — $130 to $150 billion in damages — does not represent what Musk personally lost. It represents what his lawyers say the OpenAI Foundation lost when its restricted charitable assets were channeled into a for-profit subsidiary now valued at roughly $1 trillion. The damages math traces backward from that valuation: when OpenAI completed its Public Benefit Corporation conversion on October 28, 2025, the OpenAI Foundation kept about 26% of the new equity, reported around $130 billion, while Microsoft took roughly 27% and employees and investors split the remaining 47%. Musk's theory is that the foundation's stake should have been the entire enterprise — that the charity, not Microsoft and not employee shareholders, was the rightful owner of everything ChatGPT became.

That is why his approximately $38 million in early donations matter so disproportionately. Musk does not need that $38 million to have grown into $130 billion to win the damages he seeks. Under his expert David Schizer's charitable-trust theory, the donations created a restricted purpose: any commercial value derived from assets developed under that purpose belongs to the trust, not to the people who later restructured around it. If a judge accepts that framing, the relevant valuation is OpenAI's, not the donation's. That is also why all damages would flow to the OpenAI Foundation rather than to Musk himself — a detail his team has emphasized to blunt the obvious 'this is just sour grapes' counter.

The nine jurors selected on April 27 will not decide this case. They will issue a verdict on liability that Judge Yvonne Gonzalez Rogers can adopt, ignore, or partially follow when she writes her binding ruling, expected by mid-May. This is what 'advisory jury' means in federal equity practice: the jury's role is to surface a community read on the facts, but the law gives the judge final authority because Musk's surviving claims — unjust enrichment and breach of charitable trust — are equitable, not legal, in nature. Damages flow only if the judge agrees a charitable-trust duty existed and was breached.

That is where the deepest doctrinal fight sits. Rose Chan Loui of UCLA Law has argued the entire premise is wrong: 'OpenAI is not a trust. OpenAI is a corporation. And so really they should be looking at … the law of charitable nonprofit organizations.' The distinction is not academic. Trust law imposes near-absolute fidelity to a donor's specified purpose; nonprofit corporation law gives boards much wider latitude to evolve a mission. Northwestern's Jill Horwitz pushes a related skepticism on standing — enforcement of charitable purpose has historically belonged to state attorneys general, not to ex-donors or ex-board members. If Judge Gonzalez Rogers agrees with either expert, the advisory jury's view of the facts may not matter at all, because Musk fails as a matter of law before the facts are reached.

OpenAI's opening, distilled by lead counsel into the line 'We are here because Mr. Musk didn't get his way at OpenAI,' did not require new investigation. The defense plans to put Musk's own paper trail on screen. In a November 2015 founding email, Musk himself proposed a 'standard C corp with a parallel nonprofit' — almost exactly the dual structure he is now suing to undo. In 2017, he pushed harder for a for-profit conversion, this time on the condition that he hold majority control; when Altman and Brockman declined, Musk wrote 'This is the final straw' and warned he would 'no longer fund OpenAI.' Altman's response, that he 'remain[ed] enthusiastic about the non-profit structure,' is the email OpenAI most wants the jury to remember.

Reddit's r/singularity thread on the leaked Brockman diary excerpts captured the awkward symmetry well — commenters called Brockman's habit of journaling about for-profit plans a 'huge mistake,' but several also noted that the same record cuts both ways: it shows Musk pushing for commercialization first and only objecting after he failed to take 'absolute control.' Combined with the 2023 launch of xAI and OpenAI's argument that Musk's Microsoft-related claims appeared only after that launch, the defense's narrative is not that the charity was preserved — it is that Musk's preferred version of selling out simply lost. That reframing does not require the judge to decide whether the for-profit pivot was right. It only requires her to decide whether Musk has clean enough hands to be the one challenging it.

Even legal scholars skeptical of Musk's standing — Loyola's Sam Brunson called the case a 'longshot' and noted that 'unless they made an explicit promise to him that they would never create a for-profit subsidiary, it's hard to see how he was defrauded' — agree the downside scenarios for the defendants are catastrophic. Microsoft is a co-defendant on aiding-and-abetting theory, exposed to joint liability on a damages award that could match or exceed its entire $10 billion January 2023 investment at the original $20 billion OpenAI valuation. A finding of aiding-and-abetting would also taint Microsoft's broader AI strategy at exactly the moment its Copilot and Azure OpenAI businesses are being underwritten by that same partnership. Add the requested governance relief — Altman removed as an officer and as a director of the nonprofit board, Brockman removed as an officer — and an adverse ruling becomes simultaneously a damages event, a leadership event, and a partnership event.

The second-order effect runs further. The OpenAI restructuring is the template every other AI lab eyeing a nonprofit-to-PBC conversion would have copied: Anthropic-style public benefit governance, foundation-held equity, capped employee and investor returns. If Judge Gonzalez Rogers gives any version of Musk's theory legal weight — even a narrow one that recognizes donor standing in cases of mission-defining restricted gifts — every future AI nonprofit conversion gains a new litigation surface, where any sufficiently large early donor could claim a charitable trust was created. That is the precedent risk Musk's team has emphasized in framing the case as existential for U.S. charitable giving. It is also why the ruling will be read as carefully by Anthropic's lawyers, by state attorneys general, and by donors to every other research-mission charity, as it will be by the parties in this courtroom.