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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
Bristol Myers SquibbSan Mateo, CA114Jun 25, 2024Apr 29, 2024layoffSource ↗
Freenome5th Floor South San Francisco, CA118Jun 22, 2024Apr 23, 2024layoffSource ↗
Gilead SciencesSan Mateo, CA58Jun 28, 2024Apr 23, 2024layoffSource ↗
Twenty Twenty TherapeuticsSan Mateo, CA76Jun 26, 2024Apr 23, 2024closureSource ↗
Rivian AutomotiveSan Mateo, CA1Jun 18, 2024Apr 19, 2024layoffSource ↗
Aura ManagementSan Mateo, CA20Jun 25, 2024Apr 18, 2024closureSource ↗
SanofiSan Mateo, CA100Jun 3, 2024Apr 3, 2024closureSource ↗
GenentechSan Mateo, CA436Jun 5, 2024Apr 3, 2024layoffSource ↗
TelecareSan Mateo, CA100Jun 3, 2024Apr 3, 2024closureSource ↗
CatalentSan Mateo, CA40May 24, 2024Mar 5, 2024closureSource ↗
CatalentSan Mateo, CA50May 24, 2024Mar 5, 2024closureSource ↗
Bay Area PL ServicesUnit 100 San Bruno, CA87May 4, 2024Mar 4, 2024layoffSource ↗
The Ronin ProjectSan Mateo, CA131Mar 1, 2024Mar 4, 2024closureSource ↗
Sony Interactive EntertainmentSan Mateo, CA118Mar 16, 2024Feb 27, 2024layoffSource ↗
Balfour Beatty US CivilsSan Mateo, CA222Apr 26, 2024Feb 26, 2024layoffSource ↗
Janssen Research & DevelopmentSan Mateo, CA55Apr 26, 2024Feb 23, 2024closureSource ↗
Marriott San Mateo HotelSan Mateo, CA127May 1, 2024Feb 21, 2024closureSource ↗
Del Monte Capitol MeatSan Mateo, CA92Mar 31, 2024Feb 1, 2024closureSource ↗
Activision BlizzardSte. 610 Foster City, CA76Mar 30, 2024Jan 25, 2024layoffSource ↗
Riot GamesSan Mateo, CA6Mar 25, 2024Jan 22, 2024layoffSource ↗
Plenty UnlimitedSan Mateo, CA55Jan 18, 2024Jan 19, 2024layoffSource ↗
AllakosSuite 500 San Carlos, CA59Jan 18, 2024Jan 16, 2024layoffSource ↗
NevroSan Mateo, CA63Mar 8, 2024Jan 8, 2024layoffSource ↗
Trove RecommerceSan Mateo, CA62Apr 1, 2024Dec 21, 2023closureSource ↗
Trove RecommerceSan Mateo, CA60Mar 1, 2024Dec 21, 2023closureSource ↗

581 notices · Source check Oct 11, 2026

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