Merck & Co., Inc. has a WARN Act filing history stretching from July 2009 to March 2024, with 19 notices affecting 3,978 employees in total. Filings are concentrated in Pennsylvania (9) and New Jersey (9), with additional notices across 1 other state. Notices include 16 layoffs and 2 facility closures and 1 layoff. The largest single filing affected 600 employees in North Wales, Landsdale, PA (August 2014). There have been no new filings 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.

Layoff History

Employees affected over time

All WARN Act Notices

Location	Effective Date	Employees	Type
North Sumneytown Pike North Wales, PA	Mar 15, 2024	5	layoff
North Wales, PA	Mar 15, 2024	5	layoff
North Sumneytown Pike North Wales, PA	Mar 15, 2024	5	layoff
North Wales, Lansdale, PA	Jan 3, 2020	500	layoff
North Wales, PA	Sep 12, 2016	148	layoff
North Wales, Landsdale, PA	Aug 26, 2014	600	layoff
West Point, PA	Oct 1, 2013	500	layoff
Union, NJ	Jan 19, 2011	54	layoff
Union, NJ	Jan 18, 2011	54	layoff
Union, NJ	Jan 18, 2011	54	layoff
Lafayette, NJ	Sep 27, 2010	90	layoff
Lafayette, NJ	Sep 26, 2010	90	layoff
Lafayette, NJ	Sep 26, 2010	90	layoff
KENILWORTH, NJ	Feb 9, 2010	500	layoff
KENILWORTH, NJ	Feb 8, 2010	500	layoff
KENILWORTH, NJ	Feb 8, 2010	500	layoff
Allentown, PA	Jan 28, 2010	80	closure
Seattle, WA	Jul 31, 2009	40	closure
Avenue C Riverside, PA	N/A	163	closing

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