US WARN intelligence
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
Notice history by year
Filings and attributed reports
| Company / location | Workers | Effective date | Notice date | Type / source |
|---|---|---|---|---|
| ActelionSouth San, CA | 34 | Feb 28, 2018 | Nov 3, 2017 | layoffSource ↗ |
| Hemming Horse LLP (HM LLP)San Mateo, CA | 30 | Dec 31, 2017 | Oct 27, 2017 | closureSource ↗ |
| Swissport SASan Francisco, CA | 68 | Dec 15, 2017 | Oct 5, 2017 | layoffSource ↗ |
| Menzies AviationSan Francisco, CA | 260 | Oct 11, 2017 | Aug 3, 2017 | layoffSource ↗ |
| The Ritz-Carlton, Half Moon BayHalf Moon Bay, CA | 7 | Sep 20, 2017 | Jul 21, 2017 | closureSource ↗ |
| Novartis PharmaceuticalsSan Carlos, CA | 75 | Jan 31, 2017 | Nov 28, 2016 | layoffSource ↗ |