Musk Lawsuit vs OpenAI: IPO Derailment Risk in 2026 – Trial Update

In a high-stakes legal battle that could reshape the future of artificial intelligence, a lawyer for OpenAI accused Elon Musk on Wednesday of filing a baseless lawsuit designed to “tie the company in knots” and derail its plans for an initial public offering (IPO) later this year. The accusation came during closing arguments in the closely watched Musk lawsuit against OpenAI CEO Sam Altman, a case that has laid bare the personal and corporate feud between two of Silicon Valley’s most powerful figures.

The trial, which began last week in a San Francisco federal court, has seen a nine-person jury hear testimony about the founding of OpenAI, its transition from a non-profit to a for-profit entity, and Musk’s claims that the company betrayed its original mission. According to CNBC, Judge Yvonne Gonzalez Rogers seated the jury on April 27, with opening arguments commencing the following day. The proceedings have drawn intense scrutiny from investors, tech executives, and policymakers, as the outcome could set a precedent for how AI companies are governed and financed.

Key Allegations in the Musk Lawsuit

During closing arguments on Wednesday, OpenAI’s lead counsel argued that Musk’s legal action was not about upholding the company’s original non-profit charter, but rather a calculated move to destabilize the organization ahead of its highly anticipated IPO. “This is not a lawsuit about principles,” the lawyer told the court, as reported by Yahoo Finance. “This is a billionaire using the courts to tie OpenAI in knots and scare off investors.” The lawyer further claimed that Musk, who co-founded OpenAI in 2015 before leaving the board in 2018, had grown resentful of the company’s success under Altman’s leadership.

The lawsuit, filed by Musk in early 2025, alleges that OpenAI and Altman breached their fiduciary duties by abandoning the company’s original mission of developing artificial general intelligence (AGI) for the benefit of humanity. Musk contends that the shift to a for-profit structure and the pursuit of commercial partnerships with Microsoft violated the founding agreement. However, OpenAI’s legal team has presented evidence showing that Musk himself proposed a for-profit structure in 2017 and even sought majority control of the company before leaving. “He wanted to own it, and when he couldn’t, he tried to destroy it,” the lawyer added.

Impact on OpenAI's IPO Plans

The trial has also exposed the deep personal animosity between Musk and Altman, with both men taking the stand to testify about their fractured relationship. According to Digitimes, the courtroom has become a stage for airing grievances that range from disagreements over AI safety protocols to personal slights. The report notes that the feud “cracks open in court as IPO plans loom,” with internal emails and text messages being entered into evidence that show a deteriorating partnership.

OpenAI has been preparing for what is expected to be one of the largest tech IPOs in history, with valuations rumored to exceed $150 billion. The company’s transition from a capped-profit model to a fully for-profit corporation was seen as a necessary step to attract the capital required for scaling its AI models. However, the Musk lawsuit has cast a shadow over these plans, with some investment banks reportedly adopting a wait-and-see approach until the litigation is resolved. Legal experts say that if Musk wins, the court could order OpenAI to restructure its governance or even return to its non-profit roots, effectively killing the IPO.

AI Governance Implications

In his closing statement, Musk’s attorney maintained that the lawsuit was about accountability. “Elon Musk walked away from OpenAI because it stopped being what it promised to be,” the attorney said. “This court has the power to hold Sam Altman and his board accountable for that betrayal.” The jury is expected to begin deliberations on Thursday.

Regardless of the verdict, the trial has already had a chilling effect on the AI industry, with other companies re-evaluating their own governance structures. As the world waits for the jury’s decision, one thing is clear: the outcome of this Musk lawsuit will not only determine the fate of OpenAI’s IPO but also set a critical legal benchmark for the future of artificial intelligence development.