Arsenal Biosciences layoffs in California
Arsenal Biosciences has filed 1 WARN notice in California since July 2026, covering 58 workers at 1 site in San Mateo County. It was processed by the EDD on Sep 1, 2026. The latest notice (58 workers) takes effect on Oct 29, 2026.
About this data: figures are collected automatically from California Employment Development Department and checked before publication. They are for general information only and are not advice. Confirm with the source before acting. Last verified Oct 8, 2026, 4:16 PM ET. Report an error →
Employer names and worker counts are as reported in WARN notices filed with the California Employment Development Department and may be amended by the filer. Employers who believe a listing is inaccurate can email editor@moneytrackerdaily.com with the filing reference.
All California WARN notices · Methodology · Download CSV · Cite this
Summary
All 1 notice
| Processed | Employer (as filed) | County | Site | Workers | Type | Industry | Effective | Source |
|---|---|---|---|---|---|---|---|---|
| Sep 1, 2026 | Arsenal Biosciences, Inc. | San Mateo | 329 Oyster Point Blvd South San Francisco CA 94080 | 58 | Layoff, permanent | Professional Scientific and Technical Services | Oct 29, 2026 | Listing |
Methodology
- What is included
- Every California WARN notice we have stored whose employer name matches this employer once site names, addresses and legal suffixes such as "Inc." or "LLC" are set aside, from all years collected, not only the current one. Totals are calculated by us from the notices.
- Last updated
- Oct 8, 2026, 4:16 PM ET
- Download
- CSV of the notices on this page
- Cite this
Money Tracker Daily, "Arsenal Biosciences layoffs in California", updated October 8, 2026, https://moneytrackerdaily.com/trackers/layoffs/california/company/arsenal-biosciences. Data: California Employment Development Department, WARN Report.
- Reuse
- The figures on this page may be reused with credit to Money Tracker Daily and a link to this page (CC BY 4.0). The underlying data comes from the California Employment Development Department and remains subject to its terms.
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