WARN Act filings affecting workers in San Mateo, California.
Last updated: Apr 22, 2026 · Showing last 24 months
San Mateo, CA has recorded 44 WARN filings affecting 2,639 workers over the past 24 months. The largest filer is Meta, with 701 workers affected. Of these, 5 involved facility closures and 39 were layoff events. Filing dates range from Jan 29, 2025 through Apr 1, 2026. Meta accounts for 27% of affected workers in San Mateo. San Mateo represents 4% of California workers affected by WARN filings in this period.
If your employer filed a WARN notice affecting workers in San Mateo, you are entitled to 60 days advance written notice before your last day. During the notice period, you remain employed with regular pay and benefits. If your employer gave less than 60 days notice, you may be entitled to back pay and benefits for each day of the shortfall. After your last day, file for unemployment insurance with your state workforce agency as soon as possible. Review your COBRA options to continue health coverage for up to 18 months. Visit your local America's Job Center for free career counseling, resume help, and retraining vouchers.
Apply online at your state workforce agency. You may be eligible before your last day.
Continue your employer health plan for up to 18 months, or compare lower-cost options on the Health Insurance Marketplace.
Employers with 100 or more employees must give 60 days written notice before mass layoffs or plant closings.
Free career counseling, resume help, job search assistance, and retraining programs through CareerOneStop.
Interview prep, job search management, and career planning tools to help you land your next role.
We don't have a job center listed for San Mateo specifically, but you can find nearby centers on the California page.
All data on this site is sourced from official WARN Act filings published by state workforce agencies. Filings are updated regularly but may not reflect same-day submissions. Coverage varies by state.
| Company | Type | Workers | Effective | Filed |
|---|---|---|---|---|
| Oracle 4x in 12 mo 500 Oracle Parkway Redwood City CA 94065 |
Layoff | 310 | 2026-06-01 | 2026-04-01 |
| Meta 12x in 12 mo 311 Airport Boulevard Burlingame CA 94010 |
Layoff | 124 | 2026-05-22 | 2026-03-30 |
| Gilead Sciences 333 Lakeside Drive San Mateo CA 94404 |
Layoff | 51 | 2026-05-29 | 2026-03-25 |
| Sanitation Specialists 320B Shaw Road South San Francisco CA 94080 |
Closure | 15 | 2026-05-22 | 2026-03-12 |
| Heritage Bank of Commerce 400 S. El Camino Real, Suite 150 Mateo CA 94402 |
Layoff | 5 | 2026-04-17 | 2026-02-27 |
| C3.ai 1400 Seaport Boulevard Redwood City CA 94063 |
Layoff | 71 | 2026-04-26 | 2026-02-23 |
| Meta 12x in 12 mo 305 Constitution Dr. Menlo Park CA 94025 |
Layoff | 39 | 2026-03-20 | 2026-02-02 |
| Meta 12x in 12 mo 1 Hacker Way Menlo Park CA 94025 |
Layoff | 6 | 2026-03-20 | 2026-02-02 |
| Meta 12x in 12 mo 180 Jefferson Drive Menlo Park CA 94025 |
Layoff | 2 | 2026-03-20 | 2026-02-02 |
| Meta 12x in 12 mo 190 Jefferson Drive Menlo Park CA 94025 |
Layoff | 1 | 2026-03-20 | 2026-02-02 |
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