Merck & Co., Inc.
Public company- Headquarters
- RAHWAY, New Jersey
- Ticker
- MRK
- CIK
- 0000310158
WARN notices since 2024
Workers affected since 2024
Executive changes, last 12 months
Last event
Workers affected over time
Cumulative workers in WARN notices since 2024
| Notice date | Workers affected | Cumulative |
|---|---|---|
| Mar 15, 2024 | 5 | 5 |
| Nov 14, 2025 | 58 | 63 |
| Feb 20, 2026 | 204 | 267 |
| Sep 4, 2026 | 88 | 355 |
| Nov 7, 2026 | 54 | 409 |
Leadership
| Role and person | Since | Change |
|---|---|---|
| DirectorPaul J. Diaz | Oct 13, 2026 | Appointed |
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layoffs from Dec 11, 2026
WARN noticeWARN notice: Rahway, NJ
Merck & Co filed a WARN notice with the New Jersey WARN list covering 54 workers in Rahway. The layoffs take effect on Dec 11, 2026.
Source: New Jersey WARN list, filed Nov 7, 2026Site: Rahway, NJ
Workers affected: 54
- WARN notice
WARN notice: Rahway, NJ
Merck & Co filed a WARN notice with the New Jersey WARN list covering 88 workers in Rahway. The layoffs take effect on Sep 4, 2026.
Source: New Jersey WARN list, filed Sep 4, 2026Site: Rahway, NJ
Workers affected: 88
- WARN notice
WARN notice: Rahway, NJ
Merck filed a WARN notice with the New Jersey WARN list covering 204 workers in Rahway. The layoffs take effect on Feb 20, 2026.
Source: New Jersey WARN list, filed Feb 20, 2026Site: Rahway, NJ
Workers affected: 204
- WARN notice
WARN notice: Rahway, NJ
Merck & Co. filed a WARN notice with the New Jersey WARN list covering 58 workers in Rahway. The layoffs take effect on Nov 14, 2025.
Source: New Jersey WARN list, filed Nov 14, 2025Site: Rahway, NJ
Workers affected: 58
- WARN notice
WARN notice: North Wales, PA
Merck & Co., Inc. filed a WARN notice with the Pennsylvania WARN list covering 5 workers at 351 North Sumneytown Pike , North Wales, PA 19454. The layoffs take effect on Mar 15, 2024.
Source: Pennsylvania WARN list, filed Mar 15, 2024Site: North Wales, PA
Workers affected: 5
- WARN notice
WARN notice: Kenilworth, NJ
Merck filed a WARN notice with the New Jersey WARN list covering 64 workers in Kenilworth. The layoffs take effect on Nov 14, 2016.
Source: New Jersey WARN list, filed Nov 14, 2016Site: Kenilworth, NJ
Workers affected: 64
- WARN notice
WARN notice: Branchburg, NJ
Merck - Branchburg filed a WARN notice with the New Jersey WARN list covering 172 workers in Branchburg. The layoffs take effect on Mar 16, 2015.
Source: New Jersey WARN list, filed Mar 16, 2015Site: Branchburg, NJ
Workers affected: 172
- WARN notice
WARN notice: Whitehouse Station, NJ
Merck (Merck, Sharp and Dohme Corporation) filed a WARN notice with the New Jersey WARN list covering 50 workers in Whitehouse Station. The layoffs take effect on Nov 28, 2014.
Source: New Jersey WARN list, filed Nov 28, 2014Site: Whitehouse Station, NJ
Workers affected: 50
Last verified Nov 8, 2026