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Jensen Huang, the chief executive of Nvidia, resigned on Thursday after it was revealed that he had an affair with an executive who reported to him, as well as a woman who US officials identified as a Chinese spy.

The chip company’s 10-member board met for several hours Wednesday night and agreed to name Colette Kress, the company’s chief financial officer, as interim chief executive until a permanent successor is named. plate he said Thursday that it will begin looking for a permanent replacement and will consider internal and external candidates.

Nvidia also named Harvey Jones, a longtime tech entrepreneur and investor, as chairman of the chip company. In a statement, Mr. Jones said the board has confidence in Ms. Kress and the executive team and expects “the company’s operations, customer commitments and product roadmap to continue without interruption.”

Mr. Huang’s departure opens an uncertain chapter for Nvidia, a leading maker of artificial intelligence chips, and will have far-reaching ripple effects. The Silicon Valley firm is a cornerstone of the artificial intelligence boom and one of the world’s most valuable public companies, controlling an estimated 90 percent of the market for computer chips used in the big artificial intelligence projects that power the U.S. economy.

This dominance has made Mr. Huang one of the world’s richest people and an ally of President Trump. Mr Trump had previously been informed of Mr Huang’s relationship with a woman believed to be a property of Chinese intelligence, but had taken no action. Over the past week, he has defended Mr Huang, saying he was an “honest man” who did not know the woman was a Chinese agent.

Few Silicon Valley executives — with the possible exception of Tesla and SpaceX’s Elon Musk and Apple’s Steve Jobs — have been as synonymous with their companies as Mr. Huang, 63. He founded Nvidia in 1993. As CEO, he oversees all aspects of its business, and members of his family have steadily risen through the company’s ranks. With a 3.56 percent stake, it is also Nvidia’s largest individual shareholder. The company has such a tight grip that there is no clear successor.

“Jensen is very much command and control,” said Patrick Moorhead, founder of Moor Insights & Strategy, a technology research firm. “Just as no one replaced Steve Jobs and ran the company like him, no one can replace Jensen. There has to be a different operating system.”

Any impact may be widespread, as Nvidia has also pumped money into artificial intelligence startups, cloud companies, data centers and other chip suppliers. With Mr. Huang at the helm, the company has spread its tentacles across the AI ​​industry and positioned itself at the epicenter.

Public scrutiny of Mr. Huang began after The New York Times first reported last month that U.S. intelligence agencies had discovered he had developed a close relationship with a Chinese national and chip buyer that U.S. officials believed was gathering information for Beijing.

The buyer of the chip was Alice Huang, or Huang Le, whose biography said she worked in China as a TV reporter before becoming a top executive at Singapore-based Megaspeed, which has become one of Nvidia’s biggest customers in Southeast Asia. Megaspeed has purchased more than $4.8 billion worth of chips since June 2024.

The relationship has raised US national security questions, given that the US government has banned Chinese companies from buying advanced chips. It has also raised geopolitical concerns as the United States and China vie for dominance in AI

China has denied the spying allegations. Ms. Huang did not respond to requests for comment.

Nvidia’s board has been largely supportive of Mr. Huang, who is also a board member. Other members include external executives and early investors and long-time partners of the company. They have served on the board for a combined 161 years, and many have a long history with Mr. Huang.

But after The Financial Times reported last week that Mr Huang’s relationship with Ms Huang was romantic, Nvidia’s board announced on Sunday that it was launching an investigation into his conduct. She hired the law firm Wachtell, Lipton, Rosen & Katz to help her conduct the investigation.

On the same day, Mr. Huang admitted that he had been unfaithful to his wife, Lori Huang, to whom he has been married for 41 years. He said he was “proud and grateful to be an American” and apologized for his behavior.

“My family bears no responsibility for my decisions — I do,” he said in a message to Nvidia employees. “Please give them privacy. His two children, Madison and Spencer, also work at the company.

Mr. Huang’s admission of the affair and the company’s investigation immediately set off a firestorm. Shares of Nvidia have fallen by about a third from their peak in early October, shedding more than $1.5 trillion in market value.

On Wednesday, The Times reported that Mr. Huang also had an extramarital affair with Kimberly Powell, a vice president at Nvidia who reports to him. Under the Nvidia banner code of conductemployees are told to “avoid situations where our actions create conflict” including “personal relationships,” and the company says it “promptly investigates reports of inappropriate behavior.” Many companies have policies that prohibit managers from having relationships with subordinates.

Mr Huang and Ms Powell, 48, were caught on video making love at a hotel in San Jose, California, during an Nvidia conference in March. Ms. Powell, who is married, did not respond to requests for comment.

After The Times approached Nvidia about the second affair on Wednesday, the board began discussing Mr. Huang’s future at the company.

Ms. Kress is a Nvidia veteran, having joined the company 13 years ago. She previously worked at Microsoft and Cisco. In a memo to employees Thursday, she said she has “deep faith in this company” and each of its employees.

“This company has achieved so much because of the work you all bring to it every day,” Ms. Kress said. “You are our greatest strength” She added that a company meeting will be held on Wednesday to discuss its future.

Nvidia reported its next quarterly earnings on Tuesday.

Kalley Huang contributed reporting.