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San Mateo County, California WARN notices

San Mateo County, California has 581 non-cancelled imported WARN notices reporting 46,943 workers affected. 6 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 47 eligible official filings for San Mateo County, California, reporting 6,121 affected workers. 0 worker counts are unavailable. The newest official notice date is Sep 14, 2026.

580 non-cancelled direct government records and 1 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

581Non-cancelled notices
46,943Reported workers
6Future 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

202638 notices · 5,521 reported workers
202562 notices · 3,309 reported workers
202448 notices · 3,865 reported workers
2023129 notices · 5,388 reported workers
202244 notices · 4,115 reported workers
202142 notices · 2,917 reported workers
2020170 notices · 18,271 reported workers
201923 notices · 1,595 reported workers
201817 notices · 1,372 reported workers
20177 notices · 515 reported workers
20161 notices · 75 reported workers
Oracle America →California →Redwood City →LeeMAH Electronics →Brisbane →Arsenal Biosciences →South San Francisco →Cellares →FLYING FOOD GROUP →Burlingame →Visa →Foster City →Yerba Mate Co., LLC - South San Francisco →Flagship Facilities Services →Genentech →

Filings and attributed reports

Company / locationWorkersEffective dateNotice dateType / source
Gilead SciencesSan Mateo, CA149May 27, 2025Mar 27, 2025layoffSource ↗
NkartaSan Mateo, CA52Mar 31, 2025Mar 26, 2025layoffSource ↗
NkartaSan Mateo, CA1Mar 31, 2025Mar 26, 2025layoffSource ↗
CARGO TherapeuticsSan Mateo, CA84May 19, 2025Mar 18, 2025closureSource ↗
Sutro BiopharmaSan Mateo, CA62Aug 1, 2025Mar 13, 2025layoffSource ↗
Sutro BiopharmaSan Mateo, CA3Aug 1, 2025Mar 13, 2025layoffSource ↗
Penney OpCoSan Mateo, CA82May 17, 2025Mar 12, 2025closureSource ↗
Bristol Myers SquibbSan Mateo, CA57Apr 22, 2025Feb 26, 2025layoffSource ↗
Kaiser Foundation HospitalsSan Mateo, CA1Apr 25, 2025Feb 24, 2025layoffSource ↗
Flagship Facility ServicesSan Mateo, CA35Feb 14, 2025Feb 14, 2025layoffSource ↗
Flagship Facility ServicesSan Mateo, CA19Feb 14, 2025Feb 14, 2025layoffSource ↗
Flagship Facility ServicesSan Mateo, CA23Feb 14, 2025Feb 14, 2025layoffSource ↗
Flagship Facility ServicesSan Mateo, CA1Feb 14, 2025Feb 14, 2025layoffSource ↗
Flagship Facility ServicesSan Mateo, CA18Feb 14, 2025Feb 14, 2025layoffSource ↗
Flagship Facility ServicesSan Mateo, CA10Feb 14, 2025Feb 14, 2025layoffSource ↗
Flagship Facility ServicesSan Mateo, CA9Feb 14, 2025Feb 14, 2025layoffSource ↗
Flagship Facility ServicesSan Mateo, CA4Feb 14, 2025Feb 14, 2025layoffSource ↗
Flagship Facility ServicesSan Mateo, CA8Feb 14, 2025Feb 14, 2025layoffSource ↗
WalmartSan Mateo, CA79Jun 13, 2025Feb 5, 2025layoffSource ↗
LogRhythm4th Floor Foster City, CA39Feb 4, 2025Feb 4, 2025layoffSource ↗
CARGO TherapeuticsSan Mateo, CA81Apr 1, 2025Jan 30, 2025layoffSource ↗
Astellas Gene TherapiesSan Mateo, CA21Jan 29, 2025Jan 29, 2025layoffSource ↗
Kaiser Foundation HospitalsSan Mateo, CA1Mar 22, 2025Jan 21, 2025layoffSource ↗
Draegers SupermarketsSan Mateo, CA71Mar 10, 2025Jan 10, 2025closureSource ↗
CytomX TherapeuticsSuite 400 South San Francisco, CA46Jan 17, 2025Jan 6, 2025layoffSource ↗

581 notices · Source check Oct 10, 2026

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