Merck & Co Layoffs & WARN Notices — WARN Index

Merck & Co: 29 WARN layoff notices since 2003, affecting 4,666 workers in 7 states. Latest filing September 1, 2026.

WARN notices filed by Merck & Co

• Merck & Co: Rahway, NJ · 54 workers · September 1, 2026
• Merck & Co: Rahway, NJ · 88 workers · June 1, 2026
• Merck: Rahway, NJ · 204 workers · November 1, 2025
• Merck & Co.: Rahway, NJ · 58 workers · August 1, 2025
• Merck & Co., Inc.: Riverside, PA · 163 workers · March 14, 2025
• Merck & Co., Inc.: North Wales, PA · 5 workers · January 1, 2024
• Merck & Co., Inc. ("Merck"); Merck Sharp & Dohme Corp.; Acceleron Pharma Inc. ("Acceleron"): Cambridge, MA · 170 workers · March 16, 2022
• Merck & Co., Inc.: Lansdale, PA · 500 workers · October 1, 2019
• MERCK & CO INC., Varicella Bulk Manufacturing Facility: Durham, NC · 150 workers · July 25, 2019
• Merck & Co., Inc.: Charlotte, NC · 50 workers · December 5, 2017
• Merck & Co., Inc.: Miami Lakes, FL · 112 workers · September 15, 2016
• Merck: Kenilworth, NJ · 64 workers · September 1, 2016
• Merck & Co., Inc.: North Wales, PA · 148 workers · August 1, 2016
• Merck - Branchburg: Branchburg, NJ · 172 workers · January 1, 2015
• Merck (Merck, Sharp and Dohme Corporation): Whitehouse Station, NJ · 50 workers · September 1, 2014
• Merck & Co., Inc.: Landsdale, PA · 600 workers · July 1, 2014
• Merck: Pennsylvania · 152 workers · December 1, 2013
• Merck & Co., Inc.: West Point, PA · 500 workers · October 1, 2013
• Merck: Kenilworth, NJ · 113 workers · July 1, 2013
• Merck: Kenilworth, NJ · 150 workers · October 1, 2012
• Merck: Springfield, NJ · 50 workers · October 1, 2011
• MERCK & CO., INC. (SIERRA THERAPEUTICS, INC.): SAN FRANCISCO, CA · 67 workers · July 28, 2011
• Merck & Co. Inc.: Union, NJ · 54 workers · November 1, 2010
• Merck & Co, Inc: Lafayette, NJ · 90 workers · July 1, 2010
• MERCK & CO. INC.: KENILWORTH, NJ · 500 workers · December 1, 2009
• Merck & Co. Inc.: Allentown, PA · 80 workers · November 1, 2009
• Merck & Co., Inc.: Seattle, WA · 40 workers · June 8, 2009
• Merck & Co., Inc.: San Diego, CA · 108 workers · January 19, 2005
• Merck & Co., Inc.: San Diego, CA · 174 workers · November 19, 2003

Layoffs in: California · Florida · Massachusetts · North Carolina · New Jersey · Pennsylvania · Washington