US WARN layoff notices › Employers › M › Merck &
Official state WARN filings by Merck & since 1988, normalized from state labor department sources. Latest notice: 2026-09-01.
Filed under 7 spellings in state records, merged on this page: Merck; MERCK & CO INC., Varicella Bulk Manufacturing Facility; Merck & Co., Inc. ("Merck"); Merck Sharp & Dohme Corp.; Acceleron Pharma Inc. ("Acceleron"); Merck (Merck, Sharp and Dohme Corporation); Merck - Branchburg; Merck Sharp & Dohme.
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| Notice date | State | Location | Employees | Effective date | Type |
|---|---|---|---|---|---|
| 2026-09-01 | New Jersey | Rahway | 54 | 2026-12-11 | — |
| 2026-06-01 | New Jersey | Rahway | 88 | 2026-09-04 | — |
| 2026-02-24 | North Carolina | Durham, Durham County | 147 | 2026-05-01 | Layoff |
| 2025-11-01 | New Jersey | Rahway | 204 | 2026-02-20 | — |
| 2025-08-01 | New Jersey | Rahway | 58 | 2025-11-14 | — |
| — | Pennsylvania | North Wales, Montgomery | 5 | 2024-03-15 | Layoff |
| 2022-03-16 | Massachusetts | Cambridge | 170 | 2022-05-31 | — |
| 2019-10-01 | Pennsylvania | Lansdale, Montgomery | 500 | 2020-01-03 | Layoff |
| 2019-07-25 | North Carolina | Durham County | 150 | 2019-09-25 | Closure |
| 2019-01-22 | California | Palo Alto, Santa Clara | 20 | 2019-03-19 | Closure Permanent |
| 2017-12-05 | North Carolina | Charlotte | 50 | 2018-02-23 | Closure |
| 2017-10-01 | Pennsylvania | North Wales, Montgomery | 1,800 | 2018-01-01 | Layoff |
| 2016-09-15 | Florida | Miami Lakes, FL 33014 | 112 | 2016-11-15 | — |
| 2016-09-01 | New Jersey | Kenilworth | 64 | 2016-11-14 | — |
| 2016-08-01 | Pennsylvania | North Wales, Montgomery | 148 | 2016-09-12 | Closing |
| 2015-01-01 | New Jersey | Branchburg | 172 | 2015-03-16 | — |
| 2014-09-01 | New Jersey | Whitehouse Station | 50 | 2014-11-28 | — |
| 2014-07-01 | Pennsylvania | Landsdale, Montgomery | 600 | 2014-08-26 | Permanent Layoff |
| 2014-01-01 | Pennsylvania | North Wales, Montgomery | 114 | 2014-03-31 | Closure |
| 2013-12-01 | Pennsylvania | PO Box 1000, Montgomery | 152 | 2014-02-03 | Plant Closure |
| 2013-10-01 | Pennsylvania | West Point, Montgomery | 500 | 2013-12-23 | Permanent Layoff |
| 2013-07-01 | New Jersey | Kenilworth | 113 | 2013-10-01 | — |
| 2012-10-01 | New Jersey | Kenilworth | 150 | 2012-12-05 | — |
| 2011-10-01 | New Jersey | Springfield | 50 | 2011-12-20 | — |
| 2010-11-01 | New Jersey | Union | 54 | 2011-01-19 | — |
| 2010-07-01 | New Jersey | Lafayette | 90 | 2010-09-27 | — |
| 2009-12-01 | New Jersey | KENILWORTH | 500 | 2010-02-09 | — |
| 2009-06-08 | Washington | Seattle | 40 | 2009-07-31 | Closure |
| — | Pennsylvania | Riverside, Montour | 163 | — | Closing |
Source: state WARN Act disclosures, normalized in the free US WARN notices dataset (CSV/JSON, no login, no delay, notices 1988+). WARN notices are advance notifications of plant closings and mass layoffs; actual layoff counts and dates can change after filing.
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