Koppers Inc. Layoffs - WARN Act Notices
112 Employees Affected
2 Locations
2 Notices Filed
Apr 21, 2026 Most Recent
Koppers Inc. has a WARN Act filing history stretching from August 2016 to April 2026, with 2 notices affecting 112 employees in total. Filings span South Carolina (1) and Pennsylvania (1). All classified notices are layoffs.
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.
Layoff History
Employees affected over time