Trump blocks HieFo’s $3M purchase of Emcore assets over China-related national-security concerns
President Donald Trump on Friday blocked U.S. photonics firm HieFo Corp’s $3 million acquisition of New Jersey-based aerospace and defense specialist Emcore’s assets, citing China-related national-security concerns. The decision prevents transfer of Emcore’s sensitive photonics technology and signals tighter scrutiny of defense-linked transactions.