COMPANY DOSSIER

Is Charles River Laboratories laying off workers?

Yes. Charles River Laboratories filed 5 WARN notices in the last 12 months covering 301 jobs. The most recent was filed Mar 25, 2026 for Wilmington, Massachusetts, effective Apr 24, 2026. Across every year on record since 2014: 15 notices covering 691 jobs.

691 roles affected across 15 filings in 5 states.

Canary status: SingingEVIDENCE-BASED · NOT A PREDICTION
No WARN filing or SEC event in the recent window — quiet on the wire right now.
CanaryWhistle's own assessment, computed from the public filings listed on this page. It is a read of hiring and workforce activity, not a statement about Charles River Laboratories's solvency or creditworthiness. Not a credit rating and not financial advice. See our sources and method.
◆ NATIONAL FOOTPRINT · 5 states. Each state files its own WARN notice, so small per-state counts are slices of one distributed layoff. Ranked by jobs cut:
Massachusetts281Maryland200Illinois94California79North Carolina37

Filing history

Charles River Laboratories has filed 15 WARN notices between 2014 and 2026, cutting 691 jobs in total. Up 99% year-on-year: 301 jobs cut in the last 12 months vs 151 the year before.

76
57
24
55
121
196
162
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'26
Corporate signalsSEC · PBGC · PRIMARY SOURCES

Material corporate events on record for Charles River Laboratories, beyond the WARN notice, that fill in the wider story of a company under pressure. Each links to its official source. No other layoff tracker connects these.

Mar 13, 2027Contract EndingAward 75N93024C00003 to CHARLES RIVER LABORATORIES, INC., $95,846,494, ends 2027-03-13.SEC filing →
Feb 28, 2027Contract EndingAward 75N98025F00012 to CHARLES RIVER LABORATORIES, INC., $8,558,497.38, ends 2027-02-28.SEC filing →
Feb 28, 2027Contract EndingAward 75N98026F00002 to CHARLES RIVER LABORATORIES, INC., $5,314,984.98, ends 2027-02-28.SEC filing →

Every filing

Wilmington, Massachusetts
Filed Mar 25, 2026 (7mo ago) · Effective Apr 24, 2026 · official filing →
71
Layoff
Wilmington, Massachusetts
Filed Feb 19, 2026 (8mo ago) · Effective Apr 24, 2026 · official filing →
71
Layoff
Hanover, Maryland
Filed Feb 2, 2026 (8mo ago) · Effective Mar 23, 2026 · official filing →
20
Closure
Wilmington, Massachusetts
Filed Dec 16, 2025 (10mo ago) · Effective Jan 6, 2026 · official filing →
71
Layoff
Wilmington, Massachusetts
Filed Nov 10, 2025 (11mo ago) · Effective Jan 6, 2026 · official filing →
68
Layoff
Frederick, Maryland
Filed Apr 2, 2025 (1y ago) · Effective Mar 28, 2025 · official filing →
13
Closure
Frederick, Maryland
Filed Jan 29, 2025 (1y ago) · Effective Mar 28, 2025 · official filing →
7
Closure
Filed Jan 28, 2025 (1y ago) · Effective Oct 24, 2025 · official filing →
37
Closure
Skokie, Illinois
Filed Nov 7, 2024 (1y ago) · Effective · · official filing →
94
Layoff
Frederick, Maryland
Filed Aug 2, 2024 (2y ago) · Effective Sep 30, 2024 · official filing →
13
Layoff
Frederick, Maryland
Filed Mar 14, 2024 (2y ago) · Effective May 13, 2024 · official filing →
14
Closure
South San Francisco, California
Filed Jul 19, 2023 (3y ago) · Effective Sep 19, 2023 · official filing →
55
Closure
San Diego, California
Filed Mar 19, 2019 (7y ago) · Effective May 20, 2019 · official filing →
24
Closure
Frederick, Maryland
Filed Nov 13, 2017 (9y ago) · Effective · · official filing →
57
Layoff
Frederick, Maryland
Filed Jul 9, 2014 (12y ago) · Effective Sep 25, 2014 · official filing →
76
Layoff

Questions

Is Charles River Laboratories laying off employees?

Yes. Charles River Laboratories filed 5 WARN notices in the last 12 months covering 301 jobs. The most recent was filed Mar 25, 2026 for Wilmington, Massachusetts, effective Apr 24, 2026. Across every year on record since 2014: 15 notices covering 691 jobs.

How many jobs is Charles River Laboratories cutting?

301 jobs in WARN notices filed in the last 12 months. 691 jobs across all 15 official WARN filings on record since 2014, in 5 states.

When do the Charles River Laboratories layoffs take effect?

The most recent filing lists an effective date of Apr 24, 2026. The WARN Act requires roughly 60 days' advance notice, so the filing date precedes the job losses.

Is Charles River Laboratories on a list you care about?

Paste your suppliers, customers or holdings at /monitor and see which of them have filed a layoff that has not happened yet. A WARN notice is filed about 60 days before the jobs go, so those are still ahead of you. Free to check, no account, and we do not store your list.

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