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
Watch this company
Its new filings appear in your weekly digest, free. Alert emails start on Starter.
Watch Merck & Co., Inc.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 |
Related companies
Same industry and state, with recent events.
- BRISTOL MYERS SQUIBB CO
WARN notice: Princeton, NJ
- JOHNSON & JOHNSON
WARN notice: New Brunswick, NJ
- ELITE PHARMACEUTICALS INC /NV/
Class I director appointed: John W. LaRocca, Esq.
- INSMED Inc
Class II director appointed: Paul Hudson
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 at Rahway. The layoffs take effect on 2026-12-11.
Source: New Jersey WARN list, filed Nov 7, 2026Site: Rahway, NJ
Workers affected: 54
- Executive appointment
Director appointed: Paul J. Diaz
Paul J. Diaz was named Director of Merck & Co., Inc., effective November 1, 2026. The company reported the change in an 8-K that cites Item 5.02.
Source: SEC 8-K, filed Oct 13, 2026Role: Director
- WARN notice
WARN notice: Rahway, NJ
Merck & Co filed a WARN notice with the New Jersey WARN list covering 88 workers at Rahway. The layoffs take effect on 2026-09-04.
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 at Rahway. The layoffs take effect on 2026-02-20.
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 at Rahway. The layoffs take effect on 2025-11-14.
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 2024-03-15.
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 at Kenilworth. The layoffs take effect on 2016-11-14.
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 at Branchburg. The layoffs take effect on 2015-03-16.
Source: New Jersey WARN list, filed Mar 16, 2015Site: Branchburg, NJ
Workers affected: 172
Last verified Nov 8, 2026