WARN Act Layoffs in San Mateo County, California
WARN Act mass layoff and plant closure notices in San Mateo County, California, updated daily.
Data updated
41
Notices (2026)
5,743
Workers Affected
Meta
Biggest Filing (2,212)
Information & Technology
Top Industry
Data Insights
Industry Breakdown
Workers affected by industry sector
Layoff Types
Workers affected by notice type
Latest WARN Notices in San Mateo County
| Company | City | Employees | Notice Date | Type |
|---|---|---|---|---|
| Oracle | Oakland | 279 | Layoff | |
| LeeMah Electronics | Menlo Park | 62 | Closure | |
| Arsenal Biosciences | South San Francisco | 58 | Layoff | |
| Cellares | Menlo Park | 100 | Layoff | |
| LeeMAH Electronics | City Of Industry | 205 | Closure | |
| Flying Food Group | Inglewood | 72 | Closure | |
| Visa | Foster City | 320 | Layoff | |
| Yerba Mate Co., LLC - South San Francisco | Menlo Park | 1 | Layoff | |
| LeeMAH Electronics | City Of Industry | 212 | Closure | |
| Genentech | South South San Francisco | 103 | Layoff | |
| Flagship Facilities Services | Menlo Park | 5 | ||
| Sangamo Therapeutics | Brisbane | 4 | ||
| Vine Hospitality (Left Bank Menlo Park Partners, LP) | Menlo Park | 42 | ||
| Walmart | San Bruno | 88 | ||
| Robinhood Markets | Menlo Park | 63 | ||
| Verily Health | Menlo Park | 58 | ||
| Acumen LLC & The SPHERE | Menlo Park | 58 | ||
| Meta | Menlo Park | 2,212 | ||
| Meta | Menlo Park | 338 | ||
| Gilead Sciences | Foster City | 108 |
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Cities in San Mateo County
Menlo Park (218)
South San Francisco (142)
Redwood City (112)
San Mateo (68)
Burlingame (57)
Brisbane (50)
San Bruno (29)
Foster City (27)
Daly City (25)
San Carlos (24)
Belmont (21)
South San (19)
San Francisco (18)
Fremont (15)
Half Moon Bay (10)
South South San Francisco (9)
Los Angeles (6)
Millbrae (5)
San Diego (4)
Oakland (4)
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San Mateo County, California Layoff FAQ
How many layoffs have been announced in San Mateo County, California?
San Mateo County, California has had 41 WARN Act notices (2026) affecting 5,743 workers.
What was the largest recent layoff in San Mateo County, California?
The largest WARN filing in San Mateo County, California was by Meta, affecting 2,212 workers.
What is the WARN Act?
The Worker Adjustment and Retraining Notification (WARN) Act is a federal law requiring employers with 100 or more employees to provide 60 calendar days' advance notice of plant closings and mass layoffs. Some states have stricter mini-WARN laws with lower thresholds or longer notice periods.
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