Merck has a WARN Act filing history stretching from November 2003 to November 2025, with 18 notices affecting 6,061 employees in total. Filings span New Jersey (16) and Pennsylvania (2). All classified notices are layoffs. The largest single filing affected 4,400 employees (November 2003). Filing activity has slowed, with only 3 notices 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 (2)

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

Merck
Merck & Co.

Layoff History

Employees affected over time

All WARN Act Notices

Location	Effective Date	Employees	Type
Rahway, NJ	Nov 14, 2025	58	layoff
Rahway, NJ	Nov 13, 2025	58	layoff
Rahway, NJ	Nov 13, 2025	58	layoff
Kenilworth, NJ	Nov 14, 2016	64	layoff
Kenilworth, NJ	Nov 13, 2016	64	layoff
Kenilworth, NJ	Nov 13, 2016	64	layoff
North Wales, PA	Feb 3, 2014	152	layoff
Kenilworth, NJ	Oct 1, 2013	113	layoff
Kenilworth, NJ	Sep 30, 2013	113	layoff
Kenilworth, NJ	Sep 30, 2013	113	layoff
Kenilworth, NJ	Dec 5, 2012	150	layoff
Kenilworth, NJ	Dec 4, 2012	150	layoff
Kenilworth, NJ	Dec 4, 2012	150	layoff
Springfield, NJ	Dec 20, 2011	50	layoff
Springfield, NJ	Dec 19, 2011	50	layoff
Springfield, NJ	Dec 19, 2011	50	layoff
Unknown, PA	Nov 1, 2003	4,400	layoff
Rahway, NJ	N/A	204	layoff

Were You Affected by a Layoff?

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