WARN Act filings affecting workers in Contra Costa, California.
Last updated: Oct 16, 2026 · Showing last 24 months
Contra Costa, CA has recorded 17 WARN filings affecting 360 workers over the past 24 months. The largest filer is John Muir Health, with 25 workers affected. Of these, 2 involved facility closures and 15 were layoff events. Filing dates range from Jul 1, 2026 through Sep 28, 2026. Contra Costa represents 2% of California workers affected by WARN filings in this period.
Federal WARN generally requires 60 days notice for covered events, subject to exceptions. State laws may impose different requirements. Check your own written notice and Department of Labor guidance; public filing dates alone do not establish compliance. Your state workforce agency can help with unemployment benefits and local reemployment services.
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Federal WARN generally requires 60 days notice for covered employers and qualifying events, subject to exceptions. State rules may differ.
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Data on this site comes from WARN Act filings published by state workforce agencies. Where a state does not publish a usable list, filings come from a third-party compilation and are marked on each row. Filings are updated regularly but may not reflect same-day submissions. Coverage varies by state.
| Company | Type | Workers | Effective | Recorded |
|---|---|---|---|---|
| Corteva Agriscience 901 Loveridge Road Pittsburg CA 94565 |
Layoff | 2 | 2026-10-30 Recorded: 2026-09-28 |
2026-09-28 |
| Shell Catalyst & Technologies 10 Mococo Road Martinez CA 94553 |
Closure | 64 | 2026-11-30 Recorded: 2026-09-09 |
2026-09-09 |
| John Muir Health - Treat Blvd 1400 Treat Boulevard Walnut Creek CA 94597 |
Layoff | 23 | 2026-10-28 Recorded: 2026-08-27 |
2026-08-27 |
| John Muir Health 5x in 12 mo 1450 Treat Boulevard Walnut Creek CA 94597 |
Layoff | 4 | 2026-10-28 Recorded: 2026-08-27 |
2026-08-27 |
| John Muir Health 5x in 12 mo 1601 Ygnacio Valley Road Walnut Creek CA 94597 |
Layoff | 15 | 2026-10-28 Recorded: 2026-08-27 |
2026-08-27 |
| John Muir Health - 177 La Casa Via 177 La Casa Via Walnut Creek CA 94598 |
Layoff | 2 | 2026-10-28 Recorded: 2026-08-27 |
2026-08-27 |
| John Muir Health 5x in 12 mo 2540 East Street Concord CA 94520 |
Layoff | 3 | 2026-10-28 Recorded: 2026-08-27 |
2026-08-27 |
| John Muir Health 5x in 12 mo 2740 Grant Street Concord CA 94520 |
Layoff | 2 | 2026-10-28 Recorded: 2026-08-27 |
2026-08-27 |
| John Muir Health 5x in 12 mo 3480 Buskirk Avenue Pleasant Hill CA 94523 |
Layoff | 1 | 2026-10-28 Recorded: 2026-08-27 |
2026-08-27 |
| John Muir Physician Network 1450 Treat Boulevard Walnut Creek CA 94597 |
Layoff | 6 | 2026-10-28 Recorded: 2026-08-27 |
2026-08-27 |
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