Merck & Co., Inc. (MRK) Layoffs
Merck & Co., Inc.
Layoffs
From state WARN notices, SEC filings and news reports. Reported: news reports only. Confirmed: an official filing exists.
Merck & Co., Inc. had 4 layoffs in the last 12 months, affecting 500 workers where the number was stated, and 27 in all (the earliest dated November 30, 2005). Most were in New Jersey, North Carolina, Pennsylvania.
Layoffs, 12 months
4
500 workers where stated
Layoffs in all
27
Earliest dated Nov 30, 2005
Workers in all
24,779
Where the sources state it
Newest layoff
Sep 1, 2026
Announced date
| Date | Place | Workers | Status | Sources |
|---|---|---|---|---|
| Sep 1, 2026 | Rahway, NJ | 54 | Confirmed | WARN notice |
| Jun 1, 2026 | Rahway, NJ | 88 | Confirmed | WARN notice |
| Feb 24, 2026 | Durham, NC | 154 | Confirmed | WARN notice |
| Nov 1, 2025 | Rahway, NJ | 204 | Confirmed | WARN notice |
| Aug 1, 2025 | Rahway, NJ | 58 | Confirmed | WARN notice |
| Jul 29, 2025 | United States | not stated | Confirmed | SEC 8-K |
| Mar 1, 2025 | Riverside, PA | 163 | Confirmed | WARN notice |
| Jan 1, 2024 | North Wales, PA | 5 | Confirmed | WARN notice |
| Apr 30, 2019 | United States | not stated | Confirmed | SEC 8-K |
| Jan 18, 2019 | Santa Clara, CA | 20 | Confirmed | WARN notice |
| Dec 5, 2017 | Charlotte, NC | 50 | Confirmed | WARN notice |
| Sep 1, 2016 | Kenilworth, NJ | 64 | Confirmed | WARN notice |
| Jan 1, 2015 | Branchburg, NJ | 172 | Confirmed | WARN notice |
| Sep 1, 2014 | Whitehouse Station, NJ | 50 | Confirmed | WARN notice |
| Oct 1, 2013 | United States | 8,500 | Confirmed | SEC 8-K |
| Jul 1, 2013 | Kenilworth, NJ | 113 | Confirmed | WARN notice |
| Oct 1, 2012 | Kenilworth, NJ | 150 | Confirmed | WARN notice |
| Oct 1, 2011 | Springfield, NJ | 50 | Confirmed | WARN notice |
| Jul 29, 2011 | United States | not stated | Confirmed | SEC 8-K |
| Nov 1, 2010 | Union, NJ | 54 | Confirmed | WARN notice |
| Jul 8, 2010 | United States | not stated | Confirmed | SEC 8-K |
| Jul 1, 2010 | Lafayette, NJ | 90 | Confirmed | WARN notice |
| Feb 16, 2010 | United States | not stated | Confirmed | SEC 8-K |
| Dec 1, 2009 | Kenilworth, NJ | 500 | Confirmed | WARN notice |
| Jun 8, 2009 | Seattle, WA | 40 | Confirmed | WARN notice |
The 25 newest of 27 layoffs. All US layoffs
Merck & Co., Inc. layoffs by year
| Year | Layoffs | Workers |
|---|---|---|
| 2026 | 3 | 296 |
| 2025 | 4 | 425 |
| 2024 | 1 | 5 |
| 2019 | 2 | 20 |
| 2017 | 1 | 50 |
| 2016 | 1 | 64 |
| 2015 | 1 | 172 |
| 2014 | 1 | 50 |
| 2013 | 2 | 8,613 |
| 2012 | 1 | 150 |
By the year a layoff was announced. Workers where the notice, filing or report states the number.
Merck & Co., Inc. layoffs by state
| State | Layoffs | Workers |
|---|---|---|
| New Jersey | 13 | 1,647 |
| North Carolina | 2 | 204 |
| Pennsylvania | 2 | 168 |
| Washington | 1 | 40 |
| California | 1 | 20 |
All years. Company-wide filings without a place are not in this table.
Merck & Co., Inc. layoffs at a glance
Yes: Merck & Co., Inc. has announced 4 layoffs in the last 12 months, affecting 500 workers. DataPorium tracks 27 layoffs at Merck & Co., Inc. covering 24,779 workers where the number is stated, from state WARN notices, SEC filings and news reports; the newest was announced on September 1, 2026.
The newest layoff was announced on September 1, 2026 (Rahway, NJ), affecting 54 workers. It is confirmed by a state WARN notice.
Most of Merck & Co., Inc.'s layoffs with a known place were in New Jersey (13 layoffs), North Carolina (2 layoffs) and Pennsylvania (2 layoffs).
From state WARN notices, SEC filings and news reports; newest layoff announced September 1, 2026.
Questions and answers
Has Merck & Co., Inc. had layoffs recently?
Yes. Merck & Co., Inc. had 4 layoffs in the last 12 months; the newest was announced on September 1, 2026.
How many workers has Merck & Co., Inc. laid off?
24,779 workers in all, where a notice, filing or report states the number, of them 500 in the last 12 months. Some layoffs do not state a number, so the real total can be higher.
Where did Merck & Co., Inc. have layoffs?
New Jersey (13 layoffs, 1,647 workers), North Carolina (2 layoffs, 204 workers), Pennsylvania (2 layoffs, 168 workers), Washington (1 layoff, 40 workers) and California (1 layoff, 20 workers).
Where does the Merck & Co., Inc. layoff data come from?
From state WARN notices (advance notices of mass layoffs and plant closings), SEC Form 8-K Item 2.05 filings and news reports. A layoff known only from news reports is marked Reported until an official filing confirms it.
