Charles River Laboratories has a WARN Act filing history stretching from September 2014 to March 2026, with 21 notices affecting 605 employees in total. Filings are concentrated in Illinois (10) and Maryland (7), with additional notices across 3 other states. Notices include 11 layoffs and 8 facility closures and 2 layoffs. The largest single filing affected 94 employees in Skokie, IL (January 2025).

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 (2)

This page aggregates WARN Act notices filed under 2 related names:

Charles River Laboratories
Charles River Laboratories, Inc.

Layoff History

Employees affected over time

All WARN Act Notices

Location	Effective Date	Employees	Type
Cabover Drive Hanover, MD	Mar 23, 2026	20	closure
Wilmington, MA	Jan 6, 2026	68	layoff
Durham, NC	Oct 24, 2025	37	closure
Skokie, IL	May 30, 2025	—	layoff
Skokie, IL	May 29, 2025	—	layoff
Skokie, IL	May 2, 2025	—	layoff
Skokie, IL	May 1, 2025	—	layoff
Skokie, IL	Mar 31, 2025	—	layoff
Skokie, IL	Mar 30, 2025	—	layoff
Frederick, MD	Mar 28, 2025	7	closure
Frederick, MD	Mar 28, 2025	13	closure
Skokie, IL	Feb 3, 2025	1	layoff
Skokie, IL	Feb 2, 2025	1	layoff
Skokie, IL	Jan 31, 2025	94	closing
Skokie, IL	Jan 30, 2025	94	closing
Frederick, MD	Sep 30, 2024	13	layoff
Frederick, MD	May 13, 2024	14	closure
South San Francisco, CA	Sep 19, 2023	55	closure
South San Francisco, CA	Sep 18, 2023	55	closure
Unknown, MD	Nov 13, 2017	57	closure
Unknown, MD	Sep 25, 2014	76	layoff

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