Taylor said in 2023 text that he would only join board if Altman were reinstated
Bret Taylor, chairman of the OpenAI board, arrives to court at the Ronald V. Dellums Federal Building on May 12, 2026 in Oakland, Calif.
Benjamin Fanjoy | Getty Images
After OpenAI’s nonprofit board briefly ousted Altman in 2023, Taylor said in a text message that he would only join OpenAI’s board if Altman was reinstated and would be on the board as well.
A lawyer representing Musk showed the text message to Taylor on the witness stand and asked if, when Taylor set forth that requirement, he had determined at that point that Altman was a liar or hadn’t always been transparent with the board.
“That’s correct,” Taylor replied. “I did not know all the facts at the time.”
Taylor said he had known Altman for about a decade by that time.
— Jordan Novet
Altman says Musk wanted to pass a controlling stake in OpenAI to his children
Elon Musk, chief executive officer of Tesla Inc., inside the federal court in Oakland, California, US, on Thursday, April 30, 2026.
David Paul Morris | Bloomberg | Getty Images
Defense lead counsel William Savitt asked Altman about his discussions with Musk over his stake in a possible for-profit affiliate of OpenAI.
“He only trusted himself to make non-obvious decisions,” Altman said.
“Elon had long since decided for the rest of his career he was only gonna work on companies that he totally controlled,” he said.
Altman said the idea of giving Musk a controlling stake in OpenAI long-term made him “extremely uncomfortable,” adding that his cofounders shared many of his concerns.
The cofounders asked Musk about what should happen to his OpenAI controlling stake if he died. Altman said his response was unsatisfactory to him and others because Musk said perhaps his controlling shares and votes should pass to his children.
—Lora Kolodny
OpenAI board observer from Microsoft was not part of sensitive discussions, Taylor says
Bret Taylor testifies during Elon Musk’s lawsuit trial over OpenAI’s for-profit conversion at a federal courthouse in Oakland, California, U.S., May 12, 2026 in a courtroom sketch.
Vicki Behringer | Reuters
Dee Templeton, the Microsoft executive who joined the nonprofit’s board after Altman’s brief ouster, wasn’t involved with sensitive deliberations, Taylor said.
The statement came in response to questions from Jay Jurata, a Dechert lawyer representing Microsoft in the Musk v. Altman trial.
Templeton, today a Microsoft corporate vice president and deputy chief technology officer, attended one or two OpenAI nonprofit board meetings, Taylor said.
Taylor said he wasn’t sure why Templeton got a spot on the board, but understood why Microsoft would have some sort of representation, given that “The company had recently almost imploded.”
Jurata asked Taylor if Templeton, as a board observer, had voting rights, and Taylor said she did not.
Then Jurata asked if the board observer had been part of “competitively sensitive discussions” that involved OpenAI or Microsoft, and again, Taylor said no.
— Jordan Novet
Altman takes the witness stand
CEO of OpenAI Sam Altman arrives at the courthouse on the day of the trial in Elon Musk’s lawsuit over OpenAI for-profit conversion at a federal courthouse in Oakland, California, U.S., May 12, 2026.
Carlos Barria | Reuters
Altman is up at the witness stand, and his testimony is underway. He is wearing a blue suit with a tie, and he’s answering question about his background. He said he was “always interested” in AI.
Taylor stepped down and exited the courtroom.
–Ashley Capoot
Taylor’s cross-examination is underway
A lawyer for OpenAI, William Savitt, just finished asking Taylor questions. A lawyer for Musk is now kicking off Taylor’s cross-examination.
Savitt asked Taylor about Musk’s bid to acquire OpenAI last year, which Taylor said the board unanimously voted to reject. Taylor also answered questions about the OpenAI nonprofit’s work, including its work in life sciences and AI resilience.
Taylor said the nonprofit has not accelerated its charitable activity because of Musk’s lawsuit.
“Absolutely not,” Taylor testified.
–Ashley Capoot
Taylor takes the stand, Altman watches from the courtroom
Bret Taylor, Chairman of the board of directors of OpenAI, arrives at the courthouse on the day of the trial in Elon Musk’s lawsuit over OpenAI for-profit conversion at a federal courthouse in Oakland, California, U.S., May 12, 2026.
Manuel Orbegozo | Reuters
Taylor is back on the witness stand, and proceedings are underway. He is wearing a charcoal grey suit with a grey tie.
Altman just walked into the courtroom, and he took a seat near his lawyers. He is resting his elbow on the arm of the wooden bench, and he looks relaxed.
–Ashley Capoot
After Altman, OpenAI chief futurist, and safety chair expected to testify
Joshua Achiam (R), Chief Futurist at OpenAI, arrives at the federal courthouse during proceedings in the trial over Elon Musk’s lawsuit against OpenAI in Oakland, California, on May 12, 2026.
Josh Edelson | AFP | Getty Images
While all eyes are on Altman, the company’s legal team has additional internal members on their witness list who are expected to take the stand on Wednesday.
According to filings, OpenAI’s remaining witnesses include Zico Kolter, an OpenAI Foundation board member and chair of the Safety and Security Committee at the ChatGPT maker, and Chief Futurist Josh Achiam.
Altman was called as a witness by OpenAI rather than Musk’s legal team. That means Musk’s legal team can cross-examine him and challenge his credibility or knowledge. But it also limits the scope of what Musk’s lawyers can ask Altman to only issues covered in his direct examination by defense counsel.
— Lora Kolodny
Lawyers, reporters and members of the public are heading into the courtroom
Outside the federal court in Oakland, California, US, on Monday, May 12, 2026.
Ashley Capoot | CNBC
I just took my seat inside the courtroom. There’s a long line of reporters and members of the public that are still making their way through the doors.
Lawyers for Musk and OpenAI are also filing in. There’s no sign of any witnesses yet, including Taylor or Altman.
–Ashley Capoot
Altman faces government inquiry over potential conflicts of interest
CEO of OpenAI Sam Altman walks at the courthouse during a recess of the trial in Elon Musk’s lawsuit over OpenAI for-profit conversion at a federal courthouse in Oakland, California, U.S., May 4, 2026.
Manuel Orbegozo | Reuters
The House Oversight and Government Reform Committee sent Altman a letter on Friday seeking information about how OpenAI identifies and prevents conflicts of interest.
In the letter, Committee Chair Rep. James Comer said that Brockman holds stakes in two startups that Altman backs and holds a percentage of his family fund, which was disclosed “in litigation about the original nonprofit status of OpenAI.” Comer also mentioned OpenAI’s proposed investment in Helion, a nuclear fusion company that Altman personally invested in.
“These details further raise concerns to the Committee about potential conflicts of interest arising from your use of OpenAI to potentially bolster the value of other companies and startups which you hold a financial stake in,” the letter said.
Comer is requesting information about OpenAI’s audit committee, which handles conflicts of interest, and all relevant policies, past and present, for directors and officers at OpenAI.
Comer said he wants answers by no later than May 22.
–Ashley Capoot
Here’s what Bret Taylor has said so far
Bret Taylor, co-founder and chief executive officer of Sierra International Group Inc., arrives for the morning session at the Allen & Co. Media and Technology Conference in Sun Valley, Idaho, US, on Wednesday, July 9, 2025.
David Paul Morris | Bloomberg | Getty Images
Taylor took the stand toward the end of Monday’s proceedings. He is the chairman of OpenAI’s board, a role he agreed to take on during the chaotic period where Altman was briefly ousted as CEO in 2023. Taylor said it was a rough few days for the company.
“I would describe it as dire,” Taylor testified. “It felt like the organization might collapse if a resolution was not reached.”
Taylor also spoke about OpenAI’s corporate structure before and after its recapitalization last year.
He said the new setup is a lot more straightforward for employees and investors, but that OpenAI’s nonprofit is still in control. Taylor added that some investors, including SoftBank and Thrive Capital, made their investments conditional on moving to the new structure.
Taylor spoke very fast on Monday, and Judge Gonzalez Rogers repeatedly asked him to slow down to ensure the court reporter could transcribe everything he said.
–Ashley Capoot
Takeaways from Microsoft CEO Satya Nadella’s testimony
Microsoft CEO Satya Nadella is questioned by a Microsoft attorney during Elon Musk’s lawsuit trial over OpenAI’s for-profit conversion at a federal courthouse in Oakland, California, U.S., May 11, 2026 in a courtroom sketch.
Vicki Behringer | Reuters
Microsoft CEO Satya Nadella took the stand and testified on Monday.
The company has been one of OpenAI’s major backers since 2019, investing more than $13 billion into the startup. Musk named Microsoft as a defendant in the lawsuit, as he alleges the company aided and abetted OpenAI’s purported breach of charitable trust.
Nadella said Musk never contacted him with concerns that Microsoft’s investments in OpenAI were in violation of any special terms or commitments.
He said on the stand that he was “very proud” that Microsoft took the risk to invest in OpenAI when “no one else was willing” to bet on the fledgling lab.
Nadella also spoke about his recollection of the period where Altman was removed and reinstated as CEO of OpenAI in late 2023. He said his priority was maintaining continuity for Microsoft, and that he tried to seek out more information about what happened, which was largely unavailable.
“It was sort of amateur city, as far as I’m concerned,” Nadella testified.
–Ashley Capoot
