Genentech, Inc. layoff notices at a glance
Genentech, Inc. has filed 11 WARN notices with the California Employment Development Department between Nov 1, 2017 and Jun 25, 2026, naming 1,717 workers. 1 was a closure and 10 were layoffs; 11 permanent, 0 temporary. The largest single notice named 436 workers in San Mateo County on Apr 3, 2024. Its latest notice, 103 workers in San Mateo County dated Jun 25, 2026, was 1.8% of the 5,840 workers named in all 57 San Mateo County notices of fiscal year 2025-2026. 7 of the notices show fewer than 60 days between the notice date and the effective date (see how to read this).
Industry as reported to the EDD: Professional Scientific and Technical Services.
Every notice, newest first
| Notice date | Effective | County | City | Workers | Type | Days notice |
|---|---|---|---|---|---|---|
| Jun 25, 2026 | Jul 28, 2026 | San Mateo | South San Francisco | 103 | Layoff, permanent | 33 under 60 |
| Oct 24, 2025 | Nov 28, 2025 | San Mateo | South San Francisco | 118 | Layoff, permanent | 35 under 60 |
| Jul 16, 2025 | Sep 15, 2025 | San Mateo | South San Francisco | 87 | Layoff, permanent | 61 |
| Jun 26, 2025 | Aug 18, 2025 | San Mateo | South San Francisco | 141 | Layoff, permanent | 53 under 60 |
| May 29, 2025 | Jul 14, 2025 | San Mateo | South San Francisco | 143 | Layoff, permanent | 46 under 60 |
| Aug 22, 2024 | Oct 8, 2024 | San Mateo | South San Francisco | 93 | Layoff, permanent | 47 under 60 |
| Apr 3, 2024 | Jun 5, 2024 | San Mateo | South San Francisco | 436 | Layoff, permanent | 63 |
| Mar 23, 2023 | May 24, 2023 | San Mateo | South San Francisco | 271 | Layoff, permanent | 62 |
| Feb 13, 2020 | Mar 18, 2020 | San Mateo | South San Francisco | 114 | Closure, permanent | 34 under 60 |
| Nov 29, 2018 | Dec 19, 2018 | San Mateo | South San | 83 | Layoff, permanent | 20 under 60 |
| Nov 1, 2017 | Dec 31, 2017 | Solano | Vacaville | 128 | Layoff, permanent | 60 |
Sites named on the notices
- 1 DNA Way South San Francisco CA 94080 (Jun 25, 2026, 103 workers)
- 1 DNA Way South South San Francisco CA 94080 (Apr 3, 2024, 436 workers)
Also filed as: Genentech, Inc.
Where the notices landed
- San Mateo County10 notices, 1,589 workers
- Solano County1 notice, 128 workers
- South San Francisco9 notices, 1,506 workers
- Vacaville1 notice, 128 workers
- South San1 notice, 83 workers
Local pages: San Mateo County employment law guide, Solano County employment law guide.
How to read this record
Notice date is the date on the employer's letter. Effective is the first day of separations it announced. Days notice is the gap between them; California Labor Code 1401 calls for 60 days from a covered employer, and section 1402 makes a short notice worth a day of pay and benefits for every day it is short, up to 60.
For Genentech, Inc. the shortest gap shown is 20 days. That is a reason to check whether an exception in 1401(c) or 1402.5 applied, whether the workers received the letter earlier than the EDD did, and whether anyone was let go before the effective date. It is not, by itself, a finding against the employer.
Full statute walk-through: the California 60-day rule, section by section.
If you work, or worked, at Genentech, Inc.
Keep the notice, every email about the selection, and your final pay stub. A free review covers four things in one call: whether the notice period was honored and paid, whether final pay and vacation payout arrived on time, whether the selection pattern raises an age, pregnancy or leave, or retaliation question, and what a proposed severance release is actually worth before you sign it. Call (800) 371-3088 or send the notice.
Source: California EDD WARN reports, fiscal years 2017-2018 to 2025-2026. Record last checked against the EDD on Oct 30, 2026. Back to the layoff tracker.
About this data: Notices come from the California Employment Development Department WARN reports (fiscal years 2014-2015 to today) and are reloaded from the EDD every Tuesday and Thursday. Employer names appear as the employer wrote them on the notice, grouped where the names clearly refer to the same company. A notice is not a finding that any law was broken. This page is general information, not legal advice about your situation.