The Republican chairs of three US House committees have asked Nvidia chief executive Jensen Huang to appear for a joint closed-door briefing on November 18, after reporting that US intelligence officials believe he was the target of a Chinese espionage operation.

The letter came from John Moolenaar, who chairs the House Select Committee on China, Brian Mast of Foreign Affairs, and Rick Crawford of Intelligence. "Recent reports raise significant national security concerns regarding the People's Republic of China's access to sensitive US technology and information," they wrote. "The issue of PRC infiltration and access to cutting-edge US technology is core to the investigative work of our three committees this Congress. It is vital that Congress determines the extent to which US national security has been placed at risk."

The reports in question were published by the New York Times last week. They centre on a Chinese woman named Alice Huang, an executive at Megaspeed, a Singapore-based cloud company that has bought billions of dollars of Nvidia's chips. According to the Times, US intelligence officials believe the Nvidia chief executive was the target of a Chinese spy operation; he had not received a "defensive briefing" — the warning the intelligence community usually, though not always, gives to potential espionage targets.

Nvidia rejected the characterisation. "Meetings with customers are part of a CEO's job. Jensen talks with thousands of customer executives every year," the company said. "Our regional cloud customers receive ordinary business information — not sensitive Nvidia trade secrets — and zero information relevant to national security." Nvidia said it was confident Washington would have told the company if it considered someone a threat to US industry, and that it regularly receives updates about people of concern. It said its chief executive travels with an "outstanding security team," and on Thursday would not say whether he would attend.

The backdrop is a supply chain under sustained scrutiny. Megaspeed was founded in 2023 as a spin-off of a Chinese gaming company and had already been examined over potential chip smuggling, though no charges followed. When Nvidia learned of the US concerns, it conducted unannounced on-site inspections at Megaspeed's Singapore operations and found no evidence that its chips were being diverted into China, according to people familiar with the matter.

Enforcement elsewhere has been more visible. Earlier this year Wally Liaw, a co-founder of Supermicro, one of Nvidia's key supply chain partners, was arrested in the United States and charged with smuggling Nvidia chips into China; he denies wrongdoing and has pleaded not guilty. Separately, roughly 600,000 of Nvidia's H200 accelerators are reported to be sitting in Hong Kong awaiting Chinese import approval — a stockpile that shows how much of the demand export controls were designed to manage now turns on decisions in Beijing rather than Washington.

The format matters. This is a closed-door briefing, not a public hearing, and no transcript is expected; the public record will consist of whatever the committees and Nvidia choose to say afterwards. But the summons moves the personal conduct of Nvidia's founder inside a congressional investigation at a moment when both chambers are drafting export-enforcement legislation — and it puts a company whose market value rests on being the trusted supplier of American AI infrastructure in the position of explaining a relationship with a customer the US government considers a counterintelligence concern.