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US WARN intelligence

Contra Costa County, California WARN notices

Contra Costa County, California has 308 non-cancelled imported WARN notices reporting 18,751 workers affected. 19 notices have future effective dates. These totals cover imported records only.

What the official notice history shows

During the last 365 days, this imported archive contains 37 eligible official filings for Contra Costa County, California, reporting 803 affected workers. 0 worker counts are unavailable. The newest official notice date is Sep 28, 2026.

308 non-cancelled direct government records and 0 attributed secondary records appear in the full archive. Recent official event types: layoff, closure. These figures describe notices, not unique people or completed layoffs. Grouped company names do not establish ownership.

Compare original weekly and monthly official-data reports → · How dates, names and counts are interpreted

308Non-cancelled notices
18,751Reported workers
19Future effective dates
Coverage is limited to connected sources and imported date ranges. 0 notices have unavailable worker counts. Company groups match normalized names; aliases below preserve exact employer names from filings. Methodology →

Notice history by year

202633 notices · 729 reported workers
202536 notices · 1,226 reported workers
202449 notices · 1,831 reported workers
202324 notices · 1,720 reported workers
202214 notices · 878 reported workers
202110 notices · 655 reported workers
2020109 notices · 8,469 reported workers
201914 notices · 1,858 reported workers
201814 notices · 972 reported workers
20175 notices · 413 reported workers
Corteva Agriscience →California →Pittsburg →Shell Catalyst & Technologies →Martinez →John Muir Physician Network - 1450 Treat Blvd. →Walnut Creek →John Muir Behavioral Health - 2740 Grant Street →Concord →John Muir Health - 177 La Casa Via →John Muir Health - 2740 Grant Street →John Muir Health - 3480 Buskirk Ave. →Pleasant Hill →John Muir Health - 5003 Commercial Circle →John Muir Health - 2540 East Street →

Filings and attributed reports

Company / locationWorkersEffective dateNotice dateType / source
Corteva AgriscienceContra Costa, CA2Jul 3, 2026Apr 21, 2026layoffSource ↗
Sentinel TransportationContra Costa, CA7May 31, 2026Mar 30, 2026layoffSource ↗
Corteva AgriscienceContra Costa, CA3Jun 5, 2026Mar 17, 2026layoffSource ↗
Heritage Bank of Commerce (Walnut Creek)Suite 100 Walnut Creek, CA4Apr 17, 2026Feb 27, 2026layoffSource ↗
Heritage Bank of Commerce (Danville)Contra Costa, CA4Apr 17, 2026Feb 27, 2026layoffSource ↗
Raley'sContra Costa, CA43Apr 28, 2026Feb 20, 2026closureSource ↗
Corteva AgriscienceContra Costa, CA3Apr 24, 2026Feb 18, 2026closureSource ↗
Corteva AgriscienceContra Costa, CA1Feb 27, 2026Jan 22, 2026layoffSource ↗
HenkelContra Costa, CA13Jan 30, 2026Nov 20, 2025closureSource ↗
VerizonBldg 11 Walnut Creek, CA54Jan 23, 2026Nov 20, 2025layoffSource ↗
Corteva AgriscienceContra Costa, CA4Feb 27, 2026Nov 18, 2025layoffSource ↗
Corteva AgriscienceContra Costa, CA3Jan 2, 2026Oct 21, 2025layoffSource ↗
Kaiser Foundation Hospitals (501)Contra Costa, CA1Sep 17, 2025Oct 6, 2025layoffSource ↗
Kaiser Foundation Hospitals-AntiochContra Costa, CA1Sep 8, 2025Sep 8, 2025layoffSource ↗
Kaiser Foundation Hospitals - Walnut CreekContra Costa, CA1Sep 8, 2025Sep 8, 2025layoffSource ↗
Web To DoorContra Costa, CA67Oct 27, 2025Aug 26, 2025layoffSource ↗
ChevronSuite 200 San Ramon, CA68Oct 23, 2025Aug 22, 2025layoffSource ↗
Corteva AgriscienceContra Costa, CA10Oct 24, 2025Aug 19, 2025layoffSource ↗
Southwest Key ProgramsContra Costa, CA3Oct 5, 2025Aug 6, 2025closureSource ↗
Southwest Key Programs, Inc. - Casa Pleasant HillContra Costa, CA47Jul 31, 2025Jul 31, 2025layoffSource ↗
Corteva AgriscienceContra Costa, CA4Sep 26, 2025Jul 15, 2025layoffSource ↗
Corteva AgriscienceContra Costa, CA11Aug 1, 2025Jun 10, 2025layoffSource ↗
Wells FargoContra Costa, CA1May 27, 2025May 27, 2025layoffSource ↗
Wells Fargo -1755Contra Costa, CA6May 13, 2025May 13, 2025layoffSource ↗
Wells Fargo - 1655Contra Costa, CA4May 13, 2025May 13, 2025layoffSource ↗

308 notices · Source check Oct 8, 2026