Musk-Altman Trial Surfaces Competing Claims Over OpenAI's Mission and Assets

After three weeks of testimony in a federal courtroom in Oakland, California, the most consequential technology trial in a generation now rests with a nine-person advisory jury. Elon Musk's lawsuit against Sam Altman, Greg Brockman, OpenAI, and Microsoft alleges that the leaders of the ChatGPT maker "stole a charity" and transformed it into a vehicle for personal enrichment [1]. OpenAI counters that Musk abandoned the organization in 2018 when he couldn't get control, then filed suit only after launching his own competing AI company [2].

The stakes are staggering. Musk seeks up to $150 billion in damages and the removal of Altman and Brockman from OpenAI's leadership [3]. A ruling against OpenAI could force the unwinding of its commercial transformation and reshape the global AI industry. Judge Yvonne Gonzalez Rogers, who will issue the final binding decision after receiving the advisory jury's findings, has indicated she will rule by mid-May 2026 [4].

The Money Trail: Who Gave What

The financial origins of OpenAI are central to Musk's claims — and far murkier than either side prefers to acknowledge.

When OpenAI was announced in December 2015, its backers pledged $1 billion collectively. The group included Musk, Altman, Brockman, Reid Hoffman, Peter Thiel, Jessica Livingston, Amazon Web Services, and Infosys [5]. But pledges and payments diverged sharply. By 2021, only $133.2 million had actually been collected [5].

Musk's own contributions have been a moving target. He once publicly claimed to have invested $100 million. OpenAI's records show the figure was below $45 million, and independent reporting has traced approximately $38 million in actual donations [6]. A portion was routed through the Musk Foundation to Y Combinator's nonprofit arm before reaching OpenAI [6]. During trial testimony, Musk acknowledged there was no written contract governing the terms of his donation or binding OpenAI to any specific structure [7].

This absence of a formal agreement is legally significant. Musk's central claim — that OpenAI betrayed a promise to remain a nonprofit — rests on oral understandings and the organization's founding charter rather than any signed contract between him and the other co-founders [7].

From Nonprofit to $852 Billion Corporation

OpenAI's trajectory from research nonprofit to one of the most valuable private companies in history has been rapid.

Source: CNBC, Bloomberg, TechCrunch

Data as of Mar 31, 2026CSV

Microsoft's initial $1 billion investment in 2019 began the shift. A $10 billion commitment in January 2023 accelerated it. By October 2024, OpenAI raised $6.6 billion at a $157 billion valuation. SoftBank led a $40 billion round in March 2025 at $300 billion. And in March 2026, OpenAI closed a $122 billion funding round — one of the largest in private market history — at a post-money valuation of $852 billion [8][9].

The formal restructuring came in October 2025, when OpenAI completed its conversion from a nonprofit-controlled entity to a Public Benefit Corporation (PBC). Under the new structure, the OpenAI Foundation retained a 26% stake valued at roughly $130 billion, while Microsoft received conventional equity representing approximately 27% [10].

Source: CNBC, Motley Fool

Data as of Oct 28, 2025CSV

California Attorney General Rob Bonta signed off on the deal after an 18-month investigation, requiring that charitable assets be dedicated to their intended purpose and that the Foundation retain board appointment authority [11]. Consumer advocacy groups, including Public Citizen, have criticized the arrangement, arguing that a 26% stake inadequately compensates for the full value of assets built under nonprofit status [12].

Who Profits: The Financial Stakes for Insiders

The restructuring created enormous financial incentives for OpenAI's leadership and employees. OpenAI pays an average of $1.5 million per employee in stock-based compensation — the highest of any major tech startup in history [13]. The company's approximately 4,000 employees collectively hold an estimated 47% of OpenAI's equity through a combination of traditional stock and novel Profit Participation Units (PPUs), which vest over four years with biannual liquidity events [14].

Joshua Achiam, OpenAI's Chief Futurist, disclosed equity holdings worth over $10 million during his trial testimony [4]. In August 2025, OpenAI launched retention bonuses targeting nearly 1,000 employees, with payouts ranging from $300,000 to $1.5 million [15].

If the court rules against OpenAI's restructuring, the consequences for employee compensation would be severe. Stock-based compensation now consumes roughly half of OpenAI's annual revenue, and the company has projected $3 billion in additional stock compensation expenses by 2030 [13]. A forced return to nonprofit status could render much of this equity worthless or require a complete renegotiation of compensation structures.

Microsoft's stake, valued at approximately $228 billion at the $852 billion valuation, is the single largest external financial interest in the outcome [10]. Despite this, Microsoft does not hold a seat on OpenAI's board — a condition of the restructuring deal with the California Attorney General [10]. During trial testimony, Microsoft CEO Satya Nadella stated that Musk never raised concerns to him about Microsoft's investment in OpenAI [16].

The Competitive Motive Question

OpenAI's defense rests heavily on the argument that Musk's lawsuit is a competitive weapon, not a principled governance claim.

The timeline supports this reading in part. Musk left OpenAI's board in February 2018. He founded xAI in July 2023 as a direct competitor. His initial lawsuit was filed in 2024, after xAI had begun operations [17].

During week one of the trial, Musk made a damaging admission: xAI "partly" trains its Grok model by distilling OpenAI's models — using outputs from OpenAI's systems to train its own, a practice that likely violates OpenAI's terms of service [17]. This undercut Musk's claim to be a disinterested champion of the nonprofit mission.

OpenAI's lawyer William Savitt argued in closing that Musk was "never committed to OpenAI being a nonprofit" and brought suit to undermine a competitor [3]. Internal communications introduced at trial showed that Musk had once encouraged OpenAI to consider a for-profit structure and even proposed a merger with Tesla [18].

But the competitive-motive framing has limits. Musk's concerns about OpenAI's direction predate xAI's founding. His departure from the board in 2018 followed disagreements about governance and the pace of commercialization. And regardless of his motives, the legal questions about charitable asset protection exist independently of who raised them.

What the Documents Show

The trial surfaced hundreds of internal communications — texts, emails, and diary entries — from Musk, Altman, and other key figures [18].

Among the most significant: Musk's lawyer Steven Molo presented a February 2023 text from Altman to Musk in which the OpenAI CEO wrote, "I'm tremendously thankful for everything you've done to help. I don't think that OpenAI would have happened without you" [2]. Molo used this to argue that Musk's foundational role was acknowledged even by those now opposing him.

On the other side, OpenAI introduced communications showing Musk had sought "total control" over any for-profit entity and pushed for a merger with Tesla [2][18]. Altman testified that the co-founders rejected this because "no single person should control artificial general intelligence" [2].

Former OpenAI Chief Scientist Ilya Sutskever, who briefly led the board coup that removed Altman in November 2023, testified that he had gathered evidence of Altman's "pattern of deception and poor management" — but later voted to reinstate Altman and expressed regret over the removal [4]. Five witnesses, including Sutskever and former board members, testified that Altman had been untruthful in various contexts [3].

Altman himself, when asked on the stand whether he always tells the truth, replied: "I'm sure there are some times in my life when I did not" [2]. He described his 2023 board removal as "an incredible betrayal that was very public and very painful" [4].

The Legal Precedent: Blue Cross and Beyond

The question of what happens to charitable assets when a nonprofit converts to for-profit status has legal precedent in California, though none at OpenAI's scale.

The most cited case is Blue Cross of California's conversion in the 1990s. When the health insurer transferred assets to a for-profit subsidiary, the state intervened and required distribution of over $3.2 billion in nonprofit assets to charitable healthcare foundations [19]. The California Supreme Court has held that all assets held by a corporation organized for charitable purposes are deemed held in trust for that purpose [19].

Tax law expert Daniel Hemel, testifying for OpenAI, noted that 92 of the 100 largest U.S. charities operate for-profit subsidiaries, citing the $30 billion Hershey Company as an example of a major corporation controlled by a nonprofit parent [4]. Harvard Law professor John Coates challenged the analysis of Musk's expert witness, David Schizer, calling his nonprofit governance framework "repeatedly in error or flatly wrong" [4].

The California Attorney General's office holds primary enforcement authority over charitable assets in the state. Under California law, a nonprofit public benefit corporation cannot convert to for-profit status without prior written consent from the Attorney General, and all charitable assets must be transferred to another charity or otherwise preserved for their intended purpose [19].

AG Bonta's October 2025 agreement with OpenAI represents his office's determination that the restructuring satisfies these requirements — with the $130 billion Foundation stake serving as the charitable asset preservation mechanism [11]. Critics argue this valuation is based on a speculative market price for a pre-revenue company and could prove illusory [12].

The Musk Paradox: Absent Plaintiff, Present Competitor

One of the trial's stranger subplots: Musk's physical absence from the courtroom. After testifying during week one, Musk traveled to China as part of a presidential delegation, prompting his lawyer to apologize for his absence [20]. Judge Gonzalez Rogers had warned that Musk could be called back to court [20].

Meanwhile, Altman attended the full trial, including closing arguments on May 14 [3]. The optics reinforced OpenAI's narrative that Musk is a detached billionaire using the courts for competitive advantage rather than a devoted co-founder fighting for a cause.

Forensic accountant Louis Dudney testified that all of Musk's donations were used for OpenAI's nonprofit mission, not diverted [4]. But the broader question — whether a donor can retroactively impose conditions on a gift made without written terms — remains the case's central legal puzzle.

What Comes Next

The nine-person advisory jury began deliberations on Monday, May 18, 2026 [4]. Because this is an equity case, their verdict is advisory only — Judge Gonzalez Rogers will issue the binding ruling.

The possible outcomes range widely. A full victory for Musk could theoretically force OpenAI to unwind its for-profit structure, return to nonprofit governance, and disgorge up to $134 billion in gains [4]. A full victory for OpenAI would validate the restructuring and clear the path for a potential IPO.

More likely is something in between: the court could find that certain obligations were breached without ordering a complete unwinding, or could impose additional conditions on the restructuring without reversing it.

Whatever the ruling, the case has already established that the conversion of a nonprofit into a for-profit tech giant — particularly one built with donated resources and public trust — will face serious legal scrutiny. The Blue Cross precedent set the floor at $3.2 billion [19]. OpenAI's restructuring involves assets worth hundreds of billions. The gap between those figures represents uncharted legal territory for California's charitable trust doctrine.

The trial has also exposed the personal tensions, contradictory communications, and competing financial interests that shaped the most important AI organization of the past decade. Whether those revelations ultimately benefit Musk's legal claims or simply air Silicon Valley's internal disputes for public consumption is now for the judge to decide.