Trump Blocks HieFo Chip Deal With Emcore, Citing Security (1)

President Donald Trump is blocking HieFo Corp. from acquiring semiconductor-related assets from Emcore Corp., citing national security reasons.

The order, released Friday, notes that HieFo, a Delaware-based company, was organized and is controlled by a Chinese citizen and targets the firm’s acquisition of “assets comprising the digital chips and related wafer design, fabrication, and processing businesses of” Emcore.

The companies in 2024 announced that they had completed a deal to sell New Jersey-based Emcore’s chips business and indium phosphide wafer fabrication operations for $2.92 million.

Trump’s order says that deal “threatens to impair the national security of the United ...