California · City
Layoffs in South San Francisco
Since January 29, 2025, our records for South San Francisco include 2 verified layoff stories covering at least 203 jobs and 13 WARN notices naming 874 workers.
Stories
WARN notices in South San Francisco
| Notice date | Employer | Location | Workers | Type | Effective | Filing |
|---|---|---|---|---|---|---|
| Arsenal Biosciences, Inc. | South San Francisco · San Mateo County | 58 | Layoff, permanent | Oct 29, 2026 | State report | |
| Cellares Corporation Our story | South San Francisco · San Mateo County | 100 | Layoff, permanent | Oct 20, 2026 | State report | |
| Yerba Mate Co., LLC - South San Francisco | South San Francisco · San Mateo County | 1 | Layoff, permanent | Sep 1, 2026 | State report | |
| Genentech, Inc. Our story | South San Francisco · San Mateo County | 103 | Layoff, permanent | Jul 29, 2026 | State report | |
| Sanitation Specialists | South San Francisco · San Mateo County | 15 | Closure, permanent | May 22, 2026 | State report | |
| Genentech, Inc. | South San Francisco · San Mateo County | 118 | Layoff, permanent | Nov 28, 2025 | State report | |
| Alector LLC | South San Francisco · San Mateo County | 75 | Layoff, permanent | Dec 22, 2025 | State report | |
| Sutro Biopharma, Inc. | South San Francisco · San Mateo County | 45 | Layoff, permanent | Sep 30, 2025 | State report | |
| Arsenal Biosciences, Inc. | South San Francisco · San Mateo County | 100 | Layoff, permanent | Nov 14, 2025 | State report | |
| Planned Parenthood Mar Monte, Inc. | South San Francisco · San Mateo County | 10 | Layoff, permanent | Sep 24, 2025 | State report | |
| Genentech, Inc. | South San Francisco · San Mateo County | 87 | Layoff, permanent | Sep 15, 2025 | State report | |
| genentech, Inc. | South San Francisco · San Mateo County | 141 | Layoff, permanent | Aug 18, 2025 | State report | |
| Astellas Gene Therapies, Inc. | South San Francisco · San Mateo County | 21 | Layoff, permanent | Jan 29, 2025 | State report |
Rules and resources in California
Notice rules
Under the federal WARN Act, employers with 100 or more employees generally must give 60 days’ written notice before a plant closing or mass layoff.
California has its own rules (California WARN Act (Cal-WARN)):
- Applies to employers with 75 or more employees, counting full-time and part-time workers.
- Covers a layoff of 50 or more employees within a 30-day period, a plant or facility closure, or a relocation of operations.
- Employers must give written notice at least 60 days in advance.