Johns Manville Layoff History

Johns Manville has filed 1 official WARN Act notice with state labor departments in 2026. These notices cover approximately 90 employees across California.

Layoffs at major employers like Johns Manville are often driven by restructuring after mergers or acquisitions, cost-cutting in response to changing market conditions, the consolidation of overlapping roles following integrations, or broader industry downturns. The WARN Act filings listed here represent only the legally required public notices — actual workforce reductions may be larger.

The Worker Adjustment and Retraining Notification (WARN) Act requires employers with 100 or more workers to provide 60 days' advance written notice before a mass layoff or plant closing. Failure to do so entitles affected employees to up to 60 days of back pay and benefits. WARN filings are public record — LayoffCentral.com aggregates them directly from state labor department databases.

Johns Manville's most recent WARN Act filing was recorded on 2026-04-19. WARN data often surfaces layoffs before press releases or news coverage, making it one of the earliest signals of corporate workforce reductions.