Official filing · original source linked
Arsenal Biosciences WARN notice — South San Francisco, 2026-08-31
Arsenal Biosciences, Inc. reported 58 workers affected in South San Francisco. Notice date: Aug 31, 2026; planned effective date: Oct 29, 2026.
- Raw employer name
- Arsenal Biosciences, Inc.
- Canonical company
- Arsenal Biosciences →
- Workers affected
- 58
- Event type
- layoff
- Filing status
- filed
- Notice / received date
- Aug 31, 2026
- Effective date
- Oct 29, 2026
- County
- San Mateo →
- State
- California →
- ZIP
- 94080
- Reported location
- South San Francisco
- Published address
- 329 Oyster Point Blvd South San Francisco CA 94080
- Source classification
- Layoff Permanent
- Source agency
- California Employment Development Department
Related company filings
| Company / location | Workers | Effective date | Notice date | Type / source |
|---|---|---|---|---|
| Arsenal BiosciencesSan Mateo, CA | 100 | Nov 14, 2025 | Sep 16, 2025 | layoffSource ↗ |
Dates and counts are the supplied source’s reported values. Secondary-provider locations are unstructured; they are not confirmed worksite addresses. Check the original document for phased dates, updates and exceptions.