The Real Story Behind the Musk-Zilis Trial Is Not About Sperm Donations
Shivon Zilis testified on Tuesday that Elon Musk told her to stay close to OpenAI's board and keep information flowing back to him — and that he intended to recruit three to four OpenAI employees to Tesla. She has two children with Musk. She is also a central witness in his $134 billion lawsuit against the lab he helped found, now being decided in a San Francisco courtroom.
The testimony, delivered May 6 during the live trial, is significant for a reason that has little to do with the personal details: Zilis was not merely a conflicted board member with a personal relationship to the plaintiff. Her own text messages, entered into the court record, show Musk directed her to use that access in his interest — to serve as an intelligence pipeline into an organization he is now suing for $134 billion.
"Do you prefer I stay close and friendly to OpenAI to keep info flowing or begin to disassociate?" Zilis texted Musk in 2018, according to court filings cited by The Guardian. "The Trust game is about to get tricky so any guidance on how to do right by you is appreciated."
"Close and friendly," Musk replied, as Vanity Fair reported from the same text exchange. "But we are going to actively try to move three or four people from OpenAI to Tesla. More than that will join over time, but we won't actively recruit them."
The message was sent while Zilis still sat on OpenAI's board. She remained there until 2023, serving as a director from 2020.
The governance question this creates is not subtle. Musk is arguing in court that OpenAI's transition to a for-profit structure betrayed the nonprofit's founding mission and harmed competitors — including, by implication, his own xAI. But his own communications with a board member he fathered children with show he was simultaneously treating the board as a source of both information and personnel for a competing commercial venture. Under Delaware corporate law, which governs most nonprofit boards, a director owes a fiduciary duty of loyalty to the organization's members — not to a third party who is simultaneously a litigation adversary and the parent of the director's children. If Zilis was acting as Musk's agent inside the board, that arrangement conflicted with those duties. Whether it also undermines his standing as a plaintiff claiming to have been harmed by the very board she was on is a question the court has yet to resolve.
Greg Brockman, OpenAI's president and co-founder who remains at the lab, testified that after Musk departed the board in 2018, Zilis effectively served as a proxy for him in restructuring discussions. "Zilis was kind of our proxy Elon in some ways," Brockman said, "and very involved in the restructuring of OpenAI into a for-profit entity." That testimony, if credited, places Zilis at the center of the very decisions Musk's lawsuit now challenges — while simultaneously acting as his informal recruiter from that same board.
The mechanism connecting the intel pipeline to the specific restructuring decisions at the center of the $134 billion claim is visible in the documentary record, per the court docket. Emails cited by Vanity Fair show Zilis briefing Musk in real time on the terms being discussed inside the board: she sent him updates on a proposed $500 million funding round, flagged when Altman was preparing a fixed-return structure for an OpenAI subsidiary, and passed along board-level restructuring options including whether OpenAI might become a subsidiary of Tesla. Musk responded to at least one exchange with "Ok by me" — a reply OpenAI's lawyers have argued amounts to acquiescence to the for-profit shift he now claims harmed him. The causal chain the court must trace is whether those private communications influenced how Zilis voted or lobbied inside board deliberations, or whether she was simply keeping a former cofounder informed. That distinction is load-bearing for the damages claim.
Brockman also told the court: "We trusted her to keep the Elon conflict under control." OpenAI's lawyers, presenting the defense case, have used Zilis's communications with Musk as load-bearing evidence that the relationship was not arms-length. Altman-side lawyers have separately pointed to emails where Zilis told Musk the Tesla subsidiary option "solves the funding issue immediately" and that Altman and Brockman were adamant Musk "not have control" of OpenAI — suggesting she was conveying negotiating positions rather than blocking his influence.
What remains less clear is what Zilis disclosed to the full board about Musk's commercial intentions during the restructuring discussions themselves. OpenAI's lawyers have introduced email evidence — including messages where Zilis briefed Musk on an upcoming funding round and where he responded "Ok by me" to a proposed for-profit subsidiary structure — suggesting Musk had more direct visibility into and influence over restructuring terms than his current litigation position implies. The Altman side has argued this shows Musk was aware of and acquiesced to the for-profit shift. The counter-argument is that board-level decisions required full board approval and that Zilis's private communications do not establish board authorization. What the board collectively knew, and when, is a factual dispute the documentary record has not yet fully resolved.
Zilis denied having funneled information to Musk while on the board. "Funnel? Certainly not," she said when asked directly. She told the court she initially agreed to keep the sperm donation confidential, citing security concerns, and signed a confidentiality agreement with Musk specifically about their children — a document whose scope could determine what she was permitted to disclose in her board role. The court has yet to rule on whether that agreement also covered her board deliberations.
The existence of the relationship itself was not public until Business Insider reported the twins in 2022. Zilis said she told Altman the father was Musk when she learned Business Insider was about to break the story.
Zilis is a witness for Musk, which Altman-side lawyers have been quick to exploit. But the textual evidence — the texts themselves, the Brockman proxy testimony, and the email exchanges introduced by OpenAI's defense — are largely consistent with her account, suggesting the dispute is less about whether the channels existed and more about whether they were proper.
The Altman side has presented its own evidence on the personal-relationship side. In one exchange cited by Vanity Fair, Altman texted Zilis asking whether he should tweet something complimentary about Musk after receiving a direct message asking not to appear in a photo from OpenAI's founding day. "BTW, good idea for me to tweet something nice about Elon?" Altman wrote. "Have been meaning to do this after he DMd about not being in the photo from the first day of OpenAI." The exchange — offered without evident concern about what it might suggest about board governance — suggests Altman treated the Musk relationship as a personal irritation rather than a structural conflict requiring recusal.
Zilis left OpenAI's board in March 2023 as Musk launched xAI as a direct competitor. In a text exchange introduced as evidence, Zilis messaged a friend after xAI's launch: "When the father of your babies starts a competitive effort and will recruit out of OpenAI there is nothing to be done."
Musk's legal team is seeking $134 billion in damages and the undoing of OpenAI's for-profit restructuring, with proceeds redirected to the nonprofit arm, according to court filings cited by BBC. He has argued the restructuring effectively converted a charitable enterprise into a commercial operation serving Microsoft's interests at the expense of the original mission.
The ruling in this case, whatever it is, will be read closely by every nonprofit AI lab in the country. OpenAI was not unique in its structure — the ability to accept commercial investment while maintaining a nonprofit parent is a feature many advanced AI labs have adopted to attract talent and capital without surrendering a mission-governance layer. If the court finds that a director's simultaneous personal relationship with a commercial adversary constitutes a fiduciary breach — or that a founder's private communications with a board member undermine the restructuring they later challenge — the precedent reshapes how those boards can operate. Nonprofit status cannot be a shield for governance arrangements that look different in practice than they appear on paper.
What to watch next: the court is expected to receive additional documentary evidence, including communications between Zilis and OpenAI's leadership during the 2018–2023 restructuring period. Whether those documents show Zilis disclosed Musk's commercial intentions to the full board — or kept the intel pipeline to herself — may determine whether this remains a civil dispute or becomes something more complicated for both sides.