Nvidia faces a U.S. Department of Justice antitrust investigation alongside separate inquiries into Singapore-based Megaspeed International and Super Micro, according to Semafor, which cited two administration officials. The Megaspeed inquiry follows a report that companies linked to Alice Huang invested in Chinese AI lab DeepSeek and pledged Nvidia H100 and H200 accelerators, although the investment amount and whether the commitment was fulfilled remain unconfirmed. Semafor said the Megaspeed and Super Micro investigations focused on Huang, whom it described as an alleged Chinese spy, but did not establish that Nvidia was implicated in those allegations. The report also said former Nvidia CEO Jensen Huang admitted an extramarital affair with Alice Huang before resigning; it gave no indication prosecutors intend to bring criminal charges against Nvidia or either Huang. Nvidia shares remained about 5% lower after Jensen Huang’s departure, while Super Micro shares fell 10.5%.