# Silex Microsystems to acquire and convert onsemi MEMS fab in Pennsylvania

Silex Microsystems has submitted its planned acquisition of an onsemi facility in Mountain Top, Pennsylvania, to CFIUS. The $40 million asset purchase includes the facility, property, infrastructure and manufacturing equipment, with completion expected around the turn of 2027 and 2028.

- Type: Acquisition
- Announced: 2026-11-04
- Where: Mountain Top, Pennsylvania, United States
- Value: $40.0M
- Status: announced
- Products: MEMS devices, optical circuit switches
- Sectors: [Semiconductors and Industrial Electronics](https://endata.com/sectors/semiconductors-electronics.md)

## Companies

- [onsemi](https://endata.com/companies/15223.md) (target)
- [Silex Microsystems](https://endata.com/companies/16092.md) (acquirer)

## Sources

- [electronicsbrief.com](https://www.electronicsbrief.com/articles/silex-files-for-us-approval-as-pennsylvania-mems-fab-plans-progress), 2026-11-05: "Silex has submitted its planned Pennsylvania fab acquisition to the Committee on Foreign Investment in the United States, according to its third-quarter report released on 4 November."

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.