Musk v. OpenAI Trial Begins as $840 Billion IPO Hangs in Balance

A nine-person jury seated Monday in Oakland federal court will decide whether OpenAI’s transformation from nonprofit research lab to commercial powerhouse violated its founding charter — a verdict that could block the company’s planned fourth-quarter IPO or force operational unwinding worth hundreds of billions.

The trial, with opening arguments beginning Tuesday, lands at the worst possible moment for OpenAI’s capital structure. The company closed a $110 billion funding round in February at an $840 billion post-money valuation and is targeting a Q4 2026 public listing. Jury deliberations will conclude weeks before OpenAI would file its S-1 registration statement, creating direct IPO jeopardy if remedies include operational constraints or structural spinoffs.

What Survives of Musk’s Claims

Of 26 original claims filed across multiple lawsuits, only two remain: unjust enrichment and breach of charitable trust. Both hinge on whether Sam Altman and other OpenAI leadership violated fiduciary duties when they pivoted from the 2015 nonprofit mission to the current for-profit structure.

Musk’s legal team framed the dispute in stark terms. “The perfidy and deceit are of Shakespearean proportions,” his lawyers wrote in court filings, according to NPR. In January filings, Musk sought up to $134 billion in wrongful gains, though he has since requested those funds return to OpenAI’s nonprofit parent rather than his pocket.

OpenAI countered that the lawsuit amounts to “a baseless and jealous bid to derail a competitor,” according to a company statement. The defence will likely argue that Musk — who contributed more than $44 million as OpenAI’s largest individual backer — forfeited control when he left the board in 2018 and subsequently launched xAI, now merged with SpaceX in a $1.25 trillion deal.

Structural Evolution Under Scrutiny

OpenAI was founded in 2015 as a charity dedicated to developing artificial intelligence “to benefit humanity,” free from shareholder profit pressures. That structure lasted until 2019, when the organisation created a capped-profit subsidiary limiting investor returns to 100x, with any excess flowing to the nonprofit parent.

The 2019 pivot enabled OpenAI to raise institutional capital while theoretically preserving its mission. Microsoft invested billions under this structure. But in October 2025, OpenAI restructured again, becoming a public benefit corporation in which the nonprofit retains a 26% stake plus warrants, while investors including Microsoft hold the majority.

Greg Brockman, OpenAI’s president, wrote in an autumn 2017 diary entry: “This is the only chance we have to get out from Elon,” according to documents cited by Al Jazeera. The remark suggests leadership viewed Musk’s departure as clearing the path for commercial acceleration.

IPO Mechanics at Risk

OpenAI is laying groundwork for a fourth-quarter public listing, targeting an S-1 filing in Q3 and trading debut before year-end. The company crossed $25 billion in annualized revenue at end-February, up from $21.4 billion at year-end 2025, but internal projections show losses of $14 billion in 2026 alone. Profitability is not expected until around 2030.

If the jury finds for Musk, remedies could include an injunction blocking the IPO until governance changes are implemented, forced divestiture of for-profit assets back to the nonprofit, or operational constraints limiting commercial partnerships. According to NPR, Casey Newton said: “My understanding is that the thrust of it is to try to stop OpenAI in its tracks… Prevent them from developing future models and essentially knock one player out of the AI race.”

Even if OpenAI prevails, the trial creates SEC disclosure obligations. Any material Litigation affecting corporate structure or governance must be detailed in the S-1, potentially spooking institutional investors or forcing valuation haircuts. Competitors including Anthropic are also preparing public offerings, creating timing pressure to exit before market saturation.

Precedent for AI Governance

The legal theory underpinning Musk’s breach of charitable trust claim faces skepticism from nonprofit law scholars. Sam Brunson, a professor at Loyola University Chicago, told Fortune: “As a general rule, the answer to that is no. If I donate to an organization, I’ve given up that money, and if it turns out that I don’t like what they do subsequently, my recourse is to stop donating to them.”

But the trial could establish new doctrine for AI-specific governance. No major AI lab has previously undergone courtroom scrutiny of its transition from research nonprofit to commercial entity at this scale. If the jury finds that OpenAI’s mission pivot constituted actionable breach, every AI startup with dual nonprofit-for-profit structures — including Anthropic and DeepMind’s original formation — faces heightened compliance risk.

Dan Ives, Wedbush analyst, described the proceedings as “a tech soap opera that all investors will be watching,” according to CNN. Beyond the immediate OpenAI IPO stakes, the trial outcome shapes disclosure standards for AI companies navigating the tension between public benefit missions and shareholder value maximisation.

What to Watch

Opening arguments on Tuesday will reveal whether Musk’s legal team focuses on documentary evidence of internal communications — like the Brockman diary entry — or leans on expert testimony about nonprofit governance standards. OpenAI’s defence strategy likely centres on statute of limitations arguments (Musk left the board in 2018) and the claim that donors lack standing to challenge nonprofit decisions years after contribution.

The trial runs roughly four weeks, putting verdict timing in late May. Watch for any preliminary injunction motions that could freeze OpenAI’s corporate restructuring ahead of the S-1 filing. If the jury returns a plaintiff verdict with structural remedies, expect immediate appeals that could drag into Q4 — overlapping with the IPO window and potentially forcing postponement into 2027. For investors, the key disclosure will be how OpenAI characterises litigation risk in its eventual S-1, and whether underwriters demand valuation discounts or governance concessions as IPO conditions.