Singapore has barred former Megaspeed executive Alice Huang from re-entering the country after finding that she gave police inaccurate information about her role in the company, the Ministry of Home Affairs said on Thursday, while also saying the United States gave it only limited help in its investigation.

The ministry said Singapore police and the Attorney-General's Chambers concluded in February that there was insufficient evidence to establish that Huang had committed offences over suspected inaccurate declarations about server purchases. Her passport was returned on February 26 and she left Singapore the same day.

But investigators assessed that Huang, a Hong Kong resident who was Megaspeed's chief executive, chairperson and one of its key controllers, had provided information she knew to be inaccurate to downplay her role in the company. She was issued a stern warning and barred from re-entering Singapore, the ministry said.

Singapore police and customs opened an independent investigation in February 2025 into several companies and their key officers, including Singapore-incorporated Megaspeed, over suspected false declarations in the purchase of servers and related offences. The ministry stressed that the probe was not based on any request from any country, and that Huang was not based in Singapore and was not investigated for espionage.

The ministry said it had repeatedly sought help from the United States to obtain information from Supermicro, a California-based server supplier, after the company provided limited cooperation. The issue was raised with U.S. authorities at a meeting on July 7, 2025, and repeated several times to the U.S. Department of Justice and the Federal Bureau of Investigation since September 2025. "Despite these repeated requests, Singapore has to date received limited information or assistance in respect of the company," the ministry said.

The companies under investigation had bought servers and exported them through Singapore to Malaysia without the equipment entering the Singapore market, and police are examining whether the servers were then routed to other destinations contrary to the declarations made. The U.S. Bureau of Industry and Security conducted a voluntary post-shipment verification check at Megaspeed on June 24, 2025, in Huang's presence, which was the first time Singapore became aware of American interest in the company and Huang.

Megaspeed came under renewed scrutiny after reports that U.S. authorities believe Alice Huang works for China's Ministry of State Security, and that she was linked to an extramarital affair with Nvidia co-founder Jensen Huang, who resigned as the chipmaker's chief executive on Thursday. Washington has not provided evidence for the spy claim, and Beijing on Thursday asked the United States to stop fabricating what it called "spy" narratives as a pretext for a technological blockade. Investigations into Megaspeed and six other individuals are still ongoing, and none of the six has been in Singapore since the investigations began.