WARN ACT DATABASE — Data Updated Weekly

Johns Manville Layoffs - WARN Act Notices

1,063 Employees Affected
6 Locations
10 Notices Filed
Apr 19, 2026 Most Recent
Affected States: California , Ohio , New Jersey , Alabama , Kentucky

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Johns Manville has a WARN Act filing history stretching from May 2000 to April 2026, with 10 notices affecting 1,063 employees in total. Filings are concentrated in California (3) and New Jersey (3), with additional notices across 3 other states. Notices include 6 layoffs and 4 facility closures. The largest single filing affected 170 employees in BERLIN, NJ (January 2009). Filing activity has slowed, with only 1 notice in the past 12 months.

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 (4)

This page aggregates WARN Act notices filed under 4 related names:

Layoff History

Employees affected over time

All WARN Act Notices

Location Effective Date Employees Type
Willows, CA Apr 19, 2026 90 closure
Willows, CA Sep 25, 2023 54 closure
Willows, CA Sep 24, 2023 54 closure
Defiance, OH Apr 6, 2020 35 layoff
BERLIN, NJ Jan 31, 2009 170 layoff
BERLIN, NJ Jan 30, 2009 170 layoff
BERLIN, NJ Jan 30, 2009 170 layoff
Waterville, OH Jan 27, 2007 100 layoff
Phenix City, AL Dec 31, 2006 150 closure
Boone, KY May 2, 2000 70 layoff