US WARN layoff notices › Employers › Arsenal Biosciences
Official state WARN filings by Arsenal Biosciences since 2024, normalized from state labor department sources. Latest notice: 2026-09-01.
| Notice date | State | Location | Employees | Effective date | Type |
|---|---|---|---|---|---|
| 2026-09-01 | California | San Mateo County | 58 | 2026-10-29 | Layoff Permanent |
| 2025-09-17 | California | San Mateo County | 100 | 2025-11-14 | Layoff Permanent |
Source: state WARN Act disclosures, normalized in the free US WARN notices dataset (CSV/JSON, no login, no delay, notices 2024+). WARN notices are advance notifications of plant closings and mass layoffs; actual layoff counts and dates can change after filing.
