Musk v. Altman: $134B OpenAI Trial Opens in Oakland

Federal jury selection in Musk v. Altman (Northern District of California, case 4:24-cv-04722) begins Monday, April 28, 2026, in the Oakland courthouse, with opening arguments scheduled for Tuesday and proceedings expected to conclude by mid-May. The case is presided over by Judge Yvonne Gonzalez Rogers. Musk, who helped co-found OpenAI in 2015 and departed its board in 2018, alleges that Altman, OpenAI president Greg Brockman, and Microsoft fraudulently induced his early donations by promising OpenAI would remain a nonprofit operated for the benefit of humanity, then converted the company into a for-profit structure that benefitted private shareholders. Per Musk's January filing, he is seeking up to $134 billion in damages, directed not to himself but to OpenAI's nonprofit entity. OpenAI, in an April post on X, called the suit "baseless" and described it as "a harassment campaign that's driven by ego, jealousy and a desire to slow down a competitor."

Per Musk's amended complaint and reporting by Local News Matters, the relief he seeks goes well beyond money. His filing asks the court to remove Altman and Brockman as officers and directors, force Altman, Brockman, and Microsoft to disgorge benefits allegedly extracted from the nonprofit's assets, unwind the October 2025 restructuring that had been approved by California and Delaware regulators, and direct the disputed value to what the filing calls "the OpenAI charity." Musk's attorneys argue the case is about preventing "subordination of a public charity to private, for-profit interests" and emphasise he seeks no personal monetary recovery. OpenAI's response, reported in the same coverage, called the amended filing "a legal ambush," alleging Musk contradicted months of prior positioning by shifting remedies shortly before trial.

Per reporting by CNBC and The Ringer, the witness list includes Musk, Altman, Brockman, OpenAI co-founder Ilya Sutskever, and Microsoft CEO Satya Nadella. The Ringer's trial primer indicates expected exhibits include a February 2023 email from Altman to Musk reading, in part, "i dont think openai would have happened without you - and it really fucking hurts when you publicly attack openai"; Musk's reply emphasising that "the fate of civilization is at stake"; internal memos attributed to Sutskever informally referred to as "The Ilya Memos"; and diary entries from Brockman. Damages expert Dr. C. Paul Wazzan, per the same coverage, has been engaged to support Musk's $79 to 134 billion valuation range. Musk's legal team includes Marc Toberoff, Steven Molo, Jennifer Schubert, and Jaymie Parkkinen; the defense is represented by Wachtell Lipton (William Savitt), Morrison and Foerster, and Dechert LLP.

According to The Ringer, Musk's aggressive renewed posture toward OpenAI followed what reporting describes as his annoyance at Altman's closeness with President Trump in early 2025, after which Musk made a bid to acquire OpenAI that the OpenAI board declined. SF Standard reports that Brockman and his wife contributed approximately $25 million to a pro-Trump political action committee in 2025, a donation that has drawn attention given the timing of Musk's public break with the White House over the same period. Judge Gonzalez Rogers, per trial coverage, has publicly indicated that witnesses will receive no special treatment or deference regardless of political standing.

*The following is Let's Data Science commentary on industry-wide implications, not a claim about the parties' internal plans or strategy.*

Trials that interrogate the governance structure of a frontier AI lab are rare. Comparable disputes in technology have historically settled before exhibits entered the public record; this proceeding, per multiple reports, is expected to produce days of internal-communications discovery covering OpenAI's 2019 conversion from nonprofit research entity to capped-profit model, the November 2023 board action that briefly removed Altman, the Microsoft partnership negotiations, and the valuation mechanics that turned charitable assets into for-profit equity. For practitioners, the interesting question is less the verdict than the discovery trail. A public record of how frontier labs have navigated the charitable-mission versus commercial-pressure tradeoff would become a de facto reference point for regulators, AGs of other states, and future AI governance disputes. Reporting notes OpenAI's estimated $852 billion valuation and its anticipated 2026 IPO path meaningfully increase the stakes: an adverse ruling, even a narrow one, could delay the offering or invite regulatory reassessment in jurisdictions watching the precedent.

Per court filings, the trial is scheduled to run through mid-May 2026 with a 12-person jury. Observers following the sector will look for (a) whether the more pointed internal communications between Altman, Brockman, Musk, and Sutskever enter the public record during testimony, (b) how the judge rules on evidentiary motions concerning Microsoft's role as co-defendant, (c) any movement in OpenAI's IPO timeline as proceedings progress, and (d) whether either side signals openness to settlement before verdict. Prediction markets, per SF Standard, favoured Altman at roughly 2-to-1 odds as of April 23, 2026.