*Updated* Charles River Laboratories filed 2 WARN Act notices in 2026, affecting a total of 142 employees. All filings are in Massachusetts. 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

All WARN Act Notices

Location Effective Date Employees Type
Wilmington, MA Apr 24, 2026 71 layoff
Wilmington, MA Jan 6, 2026 71 layoff