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Onsemi Agrees to Sell Two Chip Plants as It Narrows Manufacturing Footprint

The sales are meant to concentrate production at higher-scale sites, preserve customer supply with transition agreements, deliver about $35 million in annual savings by 2028.

An Onsemi logo appears in this illustration taken August 25, 2025. REUTERS/Dado Ruvic/Illustration

Overview

  • Onsemi announced on Tuesday that it has signed definitive agreements to sell its Tarlac, Philippines plant to Greatek Electronics and its Mountain Top, Pennsylvania plant to Silex Microsystems.
  • The Tarlac deal is expected to close within three to six months and includes a long-term supply agreement meant to keep output steady during the handover.
  • The Mountain Top sale carries a January 2028 closing date to give Onsemi time to move production to other facilities and avoid abrupt disruptions.
  • Onsemi says the two divestitures will start producing cost savings in 2027 and should reach roughly $35 million in annual savings by 2028; the company did not disclose the sale prices.
  • The moves reflect a broader industry trend of shifting less competitive packaging and test work to specialized providers and could pressure near-term investor sentiment as markets weigh execution timing against longer-term margin gains.