US WARN layoff notices › Employers › M › Merck &
Official state WARN filings by Merck & since 1988, normalized from state labor department sources. Latest notice: 2026-06-01.
| Notice date | State | Location | Employees | Effective date | Type |
|---|---|---|---|---|---|
| 2026-06-01 | New Jersey | Rahway | 88 | 2026-09-04 | — |
| 2025-08-01 | New Jersey | Rahway | 58 | 2025-11-14 | — |
| — | Pennsylvania | North Wales, Montgomery | 5 | 2024-03-15 | Layoff |
| 2016-09-15 | Florida | Miami Lakes, FL 33014 | 112 | 2016-11-15 | — |
| 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.
