The assertion by Super Micro, whose cofounder was arrested earlier this year on charges of smuggling Nvidia chips to China, comes as observers look for possible connections between two companies whose business dealings with Nvidia are under scrutiny.

“Megaspeed is not, and has never been, a Supermicro customer,” a spokesperson told Fortune in a statement. The company also said it “has been responsive to inquiries and has fully cooperated with U.S. and Taiwanese officials, while also voluntarily providing information and engaging with all requests from Singapore authorities to date.”

Supermicro’s statement came after Singapore’s Ministry of Home Affairs said Thursday that the Singapore Police Force and Customs had opened investigations into Megaspeed and Alice Huang, a former top executive there who had an affair with Nvidia’s Jensen Huang, and who some authorities believe was acting as a spy for China.

Singapore authorities said they had asked Supermicro for information and had received only “limited cooperation.” The ministry said the Supermicro cooperation matter was first raised with U.S. authorities on July 7, 2025 and then repeatedly afterward with the Department of Justice and the FBI.

Alice Huang, who isn’t related to ex-Nvidia CEO Jensen Huang, drew intense scrutiny after reports that she and the Nvidia co-founder were having an affair, which came out before his resignation on Wednesday. The U.S. Attorney’s Office in Manhattan is reportedly looking into whether entities linked to her helped smuggle Supermicro hardware with Nvidia GPUs into China. Multiple probes have been initiated into export control breaches related to Alice and her businesses, including Megaspeed. Jensen, Nvidia, and Supermicro have not been charged with wrongdoing. 

However, Jensen’s downfall has cast a dark cloud over Supermicro at an intensely complicated moment for the hardware and liquid cooling tech company. One of Supermicro’s three co-founders, Charles Liang, is a longtime friend of Jensen’s and the two both hail from Taiwan. They’ve shared the stage at multiple massive Computex tech events in Taiwan, including in 2024 when Jensen was photographed having drinks with Alice. Both cofounded their companies in 1993 and Supermicro’s close relationship with Nvidia has been a boon for customers hoping to be first in line for the latest generations of high-performing chips Nvidia churns out. 

Another Supermicro cofounder, Yih-Shyan “Wally” Liaw, was arrested and charged in March along with two others for allegedly working to route about $2.5 billion in servers with Nvidia’s H200 and B200 GPUs into China through a Southeast Asian front company. Liaw has pleaded not guilty, and his trial has been pushed to March 2027. A co-defendant, Ting-Wei “Willy” Sun, pleaded guilty in October. Supermicro has said it was a victim of the scheme and conducted an internal investigation finding no evidence current members of senior management were aware of the alleged conspiracy. Supermicro’s stock fell nearly 4% this week.

In August, prosecutors in Keelung, Taiwan indicted nine people over 130 Supermicro servers with Nvidia B300 chips that were allegedly cleared for shipment using forged data-center inspection records. Some 74 of the servers made it to China and customs intercepted the rest. The defendants include two former Supermicro Taiwan employees and a former Nvidia Taiwan employee, who face breach of trust and document forgery charges. In Taiwan, unauthorized AI chip exports to China aren’t currently considered a criminal offense, which is why the charges relate to forgery and breach-of-trust charges. Neither Nvidia nor Supermicro was charged.

The company said in a statement that it “maintains a robust compliance program and continues to work closely with authorities and industry partners to combat diversion and help protect American innovation.” The company has disclosed a grand jury subpoena and inquiries from the SEC, the Commerce Department’s Bureau of Industry and Security, and foreign authorities.