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San Mateo County WARN Layoff Notices

155 WARN filings on record affecting 13,850 workers in San Mateo County, California.

Sourced from California EDD public WARN records. Updated 2026-08-13.

What is on record

Every mass layoff, closure, or relocation notice filed with the California Employment Development Department for San Mateo County, as published by the state. Kcalbin resolves employer names that the state files under multiple site or building labels, so one employer counts once.

Filings on record

155

Distinct WARN notices

Workers affected

13,850

Sum of reported headcounts

Employers

98

After name resolution

Coverage. California filings run from April 2023 to the present and are rebuilt from the CA EDD fiscal-year archives plus the live rolling report, refreshed hourly. 2023 is a partial year (records begin 25 April 2023). See methodology.

Labor market context

WARN filings say what an employer has announced. They do not say what the surrounding labor market can absorb. San Mateo County's own unemployment figures, from the BLS Local Area Unemployment Statistics series, are shown alongside for that reason.

Unemployment rate

3.1%

BLS LAUS, 2026-05

Labor force

404,523

Civilian labour force, same period

Range, last 12 months

3.1%–4.3%

Monthly low to high

Most-affected employers in San Mateo County

Ranked by number of separate notices filed. Site-level variants of the same employer are combined.

EmployerFilingsWorkers
Meta Platforms, Inc133,251
Genentech, Inc71,121
Gilead Sciences, Inc6512
Kaiser Foundation Hospitals524
Robinhood Markets, Inc489
Walmart4534
Oracle America, Inc4644
Astellas Gene Therapies, Inc448
Visa3538
Cruise LLC3433
Illumina, Inc386
The Primary School2122
Sangamo Therapeutics, Inc2106
Chan Zuckerberg Initiative, LLC270
Informatica LLC2125

Filings by year

YearFilings
202322
202447
202555
202631

Recent filings

Most recent first, by effective layoff date.

CompanyWorkersLayoff dateNotice date
Visa3202026-10-012026-07-31
LeeMAH Electronics2122026-09-082026-07-07
Robinhood Markets, Inc632026-09-012026-06-16
Yerba Mate Co., LLC12026-09-012026-07-27
Walmart882026-08-212026-06-19
Verily Health Inc582026-08-072026-06-08
Genentech, Inc1032026-07-292026-06-26
Acumen LLC & The SPHERE582026-07-262026-05-28
Meta Platforms, Inc2,5502026-07-222026-05-22
Flagship Facilities Services, LLC52026-07-192026-06-26
The Primary School222026-06-302026-04-28
The Primary School1002026-06-302026-04-28
Gilead Sciences, Inc1082026-06-302026-04-30
Vine Hospitality422026-06-232026-06-21
Sangamo Therapeutics, Inc42026-06-222026-06-22
Oracle America, Inc3102026-06-012026-04-01
Gilead Sciences, Inc512026-05-292026-03-25
Meta Platforms, Inc1242026-05-222026-03-30
Sanitation Specialists152026-05-222026-03-12
C3.ai, Inc712026-04-262026-02-23
Resonetics, LLC612026-04-212026-01-20
Heritage Bank of Commerce52026-04-172026-02-27
Chan Zuckerberg Initiative, LLC322026-03-302026-01-29
Chan Zuckerberg Initiative, LLC382026-03-302026-01-29
Meta Platforms, Inc22026-03-202026-02-02
Meta Platforms, Inc2192026-03-202026-01-16
Meta Platforms, Inc62026-03-202026-02-02
Meta Platforms, Inc22026-03-202026-02-02
Meta Platforms, Inc392026-03-202026-02-02
Meta Platforms, Inc12026-03-202026-02-02
Informatica LLC352026-02-282026-01-12
Transdev Services, Inc772025-12-312025-10-30
Dairyland Produce, LLC222025-12-242025-10-23
Meta Platforms, Inc12025-12-222025-10-22
Meta Platforms, Inc32025-12-222025-10-22
Meta Platforms, Inc2612025-12-222025-10-22
Meta Platforms, Inc212025-12-222025-10-22
Alector LLC752025-12-222025-10-21
Meta Platforms, Inc222025-12-222025-10-22
Genentech, Inc1182025-11-282025-10-24
Canyon Ranch Woodside562025-11-212025-09-24
Carbon, Inc782025-11-172025-09-15
San Bruno CityNet Services132025-11-152025-09-15
Arsenal Biosciences, Inc1002025-11-142025-09-16
Agile Physical Therapy192025-11-142025-09-12
Oracle America, Inc42025-11-102025-10-01
Oracle America, Inc1872025-11-032025-09-02
Oracle America, Inc1432025-10-132025-08-13
Sutro Biopharma, Inc542025-09-302025-09-29
Kaiser Foundation Hospitals202025-09-172025-10-06
Genentech, Inc872025-09-152025-07-16
Walmart1062025-08-222025-05-23
Genentech, Inc1412025-08-182025-06-26
Prothena Biosciences Inc912025-08-012025-06-02
Sutro Biopharma, Inc652025-08-012025-03-13
Planned Parenthood Mar Monte, Inc12025-07-242025-07-24
Planned Parenthood Mar Monte, Inc192025-07-242025-07-24
Eikon Therapeutics Inc552025-07-212025-05-21
PMAB-5, LLC632025-07-182025-05-16
Genentech, Inc1432025-07-142025-05-29
257 Unitek Learning Education Group Corp12025-07-032025-04-30
Cruise LLC852025-07-032025-07-03
NGM Biopharmaceuticals, Inc852025-06-302025-04-29
Walmart792025-06-132025-02-05
Pacific Biosciences of California, Inc702025-06-082025-04-09
Gilead Sciences, Inc1492025-05-272025-03-27
CARGO Therapeutics, Inc842025-05-192025-03-18
Penney OpCo LLC822025-05-172025-03-12
Pliant Therapeutics692025-05-012025-05-01
Kaiser Foundation Hospitals12025-04-252025-02-24
Bristol Myers Squibb572025-04-222025-02-26
CARGO Therapeutics, Inc812025-04-012025-01-30
Nkarta, Inc532025-03-312025-03-26
Kaiser Foundation Hospitals12025-03-222025-01-21
Gilead Sciences, Inc1042025-03-142024-11-13
Draegers Supermarkets712025-03-102025-01-10
Insitro, Inc632025-03-092025-05-08
Advance Stores Company, Incorporated and its subsidiary82025-03-092024-11-14
Flagship Facility Services LLC1272025-02-142025-02-14
LogRhythm Inc392025-02-042025-02-04
Astellas Gene Therapies, Inc212025-01-292025-01-29
Visa1922025-01-212024-11-21
CytomX Therapeutics, Inc462025-01-172025-01-06
23andMe, Inc312025-01-102024-11-19
Visa262025-01-032024-11-01
Astellas Gene Therapies, Inc102025-01-012024-10-23
Stachs LLC432024-12-312024-10-16
Equinix872024-12-062024-11-08
Kaiser Foundation Hospitals12024-11-222024-09-23
GoPro, Inc732024-11-082024-10-29
Astellas Gene Therapies, Inc72024-10-212024-08-27
GRAIL, Inc1792024-10-142024-08-13
Genentech, Inc932024-10-082024-08-22
Konica Minolta Business Solutions U.S.A., Inc202024-09-302024-07-29
Exabeam, Inc432024-09-162024-07-16
Walmart2612024-08-092024-05-17
La Petite Baleen Inc772024-08-052024-06-03
Bolt Biotherapeutics, Inc382024-07-152024-05-14
BioMarin Pharmaceutical Inc32024-07-132024-05-14
Indeed Inc872024-07-122024-05-13

Other California counties

Los Angeles County · Santa Clara County · San Diego County · Orange County · Alameda County · San Francisco County · San Bernardino County · Riverside County · Sacramento County · Contra Costa County · Fresno County · Kern County

All California WARN data

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