Supermicro stock tumbles after smuggling charges

An unsealed federal indictment names Yih‑Shyan “Wally” Liaw, Ruei‑Tsang “Steven” Chang and Ting‑Wei “Willy” Sun for allegedly conspiring to divert U.S.‑assembled high‑performance servers with advanced AI GPUs to China, according to a U.S. Attorney’s Office press release dated March 19, 2026. (justice.gov) Prosecutors say the trio arranged roughly $2.5 billion in server sales to an intermediary in Southeast Asia and that about $510 million worth of servers containing restricted Nvidia B200 and H200 GPUs were ultimately repackaged and sent to destinations in China. (nbcnews.com) The indictment alleges schemes using false paperwork, staged “dummy” servers to mislead inspectors and multistep transshipment routes to conceal final destinations, tactics the DOJ says were used to evade U.S. export controls. (justice.gov) Investigators additionally describe hands‑on tampering to move serial numbers between working and dummy units as part of the scheme, per detailed reporting on the indictment’s allegations. (tomshardware.com) Liaw and Sun were arrested and are expected to be presented in the Northern District of California while Chang remains at large, and Supermicro said it placed the two employees on administrative leave and terminated the contractor named in the indictment. (justice.gov) (supermicro.com) Following the unsealed charges, company filings show Liaw resigned from Supermicro’s board effective March 20, 2026, a move confirmed in contemporaneous reporting. (cnbc.com) The market impact wiped roughly $5 billion from Supermicro’s valuation on the trading session that followed and the shares closed at about $20.53 on March 20, 2026, while the company still operates under previous scrutiny after its auditor resigned in October 2024 citing concerns about internal controls and governance. (money.usnews.com) (marketbeat.com) (sec.gov)