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Ametek has a WARN Act filing history stretching from November 1998 to December 2025, with 13 notices affecting 1,680 employees in total. Filings are concentrated in Illinois (4) and Ohio (3), with additional notices across 3 other states. Notices include 8 layoffs and 3 facility closures and 2 layoffs. The largest single filing affected 268 employees in Woodstock, NY (April 2020).

Under the WARN Act (Worker Adjustment and Retraining Notification Act), employers with 100 or more employees are required to provide 60 days advance notice before conducting plant closures or mass layoffs. These notices are filed with state labor departments and are public record.

Filing Identities (10)

This page aggregates WARN Act notices filed under 10 related names:

AMETEK
AMETEK Bison Gear & Engineering, Inc.
AMETEK Hughes-Treitler
AMETEK PRESTOLITE MOTORS USA
AMETEK Rotron (Woodstock)
AMETEK Speciality Motors
AMETEK Specialty Motors
AMETEK Westchester Plastics
Ametek
Ametek M & CT Division

Layoff History

Employees affected over time

All WARN Act Notices

Location	Effective Date	Employees	Type
St. Charles, IL	Dec 19, 2025	—	layoff
St. Charles, IL	Dec 18, 2025	—	layoff
St. Charles, IL	Jul 21, 2025	167	closing
St. Charles, IL	Jul 20, 2025	167	closing
Garden City, NY	Apr 6, 2020	170	layoff
Woodstock, NY	Apr 2, 2020	268	layoff
Wapakoneta, OH	Apr 2, 2020	78	layoff
Sellersville, PA	Sep 1, 2008	—	layoff
Chambersburg, PA	Jun 16, 2003	179	closure
Chambersburg, PA	Jun 16, 2003	179	closure
Decatur, AL	Dec 15, 2000	250	closure
Cambridge, OH	Oct 16, 1999	148	layoff
Cambridge, OH	Nov 29, 1998	74	layoff