Shivon Zilis testified at the Musk v. OpenAI trial, with documents showing Musk knew of the for-profit shift, undermining his deception claim.
Shivon Zilis, a former OpenAI board member and the mother of four of Elon Musk's children, took the stand on Day 7 of the ongoing federal trial in Oakland, California, delivering testimony that directly challenged Musk's central factual contention in his lawsuit against OpenAI and its leadership [1]. OpenAI's attorneys presented contemporaneous internal documents during her examination showing that Musk was aware of the company's creation of a for-profit subsidiary and was described as "supportive in spirit," even though he ultimately declined to invest in the restructured entity [1]. That documentary record cuts against the narrative Musk has advanced throughout the litigation: that OpenAI's transition away from its nonprofit structure was a surprise, and a betrayal of the founding mission he helped finance [1].
The trial is proceeding before U.S. District Judge Yvonne Gonzalez Rogers in the Northern District of California [1]. Musk filed suit against OpenAI, its chief executive Sam Altman, and affiliated parties, alleging breach of contract and related claims arising from OpenAI's gradual shift toward a for-profit operating model. The case has drawn sustained attention because Musk was a founding donor and early backer of OpenAI before departing its board in 2018. Zilis served on OpenAI's board during a period when the restructuring debates were active, and her dual role, as both a board participant and a close personal associate of Musk, positioned her as a singular witness to internal deliberations [1].
The significance of her testimony lies in its sourcing. Unlike characterizations offered by adversarial witnesses, Zilis's account was anchored to private communications produced in discovery, giving the documentary evidence additional credibility before the jury [1]. If the jury credits those documents, Musk's claim that he was deceived about the for-profit transition becomes materially harder to sustain. The testimony also surfaced the overlapping personal and professional relationships embedded in this dispute, a factor that complicates any clean narrative either side might prefer to present [1].
The trial is now in its second week, with testimony expected to continue as OpenAI works through its witness list [1]. The court has not yet indicated when closing arguments will be scheduled. Musk's legal team will have the opportunity to cross-examine witnesses and present its own evidence in rebuttal. How Judge Gonzalez Rogers instructs the jury on the nonprofit governance questions at the heart of the case may ultimately matter as much as any individual witness's account.