Sutro Biopharma, Inc. layoff notices at a glance
Sutro Biopharma, Inc. has filed 5 WARN notices with the California Employment Development Department between Mar 13, 2025 and Sep 29, 2025, naming 119 workers. All were layoffs rather than closures; 5 permanent, 0 temporary. The largest single notice named 62 workers in San Mateo County on Mar 13, 2025. Its latest notice, 45 workers in San Mateo County dated Sep 29, 2025, was 0.8% of the 5,840 workers named in all 57 San Mateo County notices of fiscal year 2025-2026. 3 of the notices show fewer than 60 days between the notice date and the effective date (see how to read this).
Every notice, newest first
| Notice date | Effective | County | City | Workers | Type | Days notice |
|---|---|---|---|---|---|---|
| Sep 29, 2025 | Sep 30, 2025 | San Mateo | South San Francisco | 45 | Layoff, permanent | 1 under 60 |
| Sep 29, 2025 | Sep 30, 2025 | San Mateo | San Carlos | 8 | Layoff, permanent | 1 under 60 |
| Sep 29, 2025 | Sep 30, 2025 | San Mateo | Remote | 1 | Layoff, permanent | 1 under 60 |
| Mar 13, 2025 | Aug 1, 2025 | San Mateo | San Carlos | 62 | Layoff, permanent | 141 |
| Mar 13, 2025 | Aug 1, 2025 | San Mateo | South San Francisco | 3 | Layoff, permanent | 141 |
Sites named on the notices
- 111 Oyster Point Blvd South San Francisco CA 94080 (Sep 29, 2025, 45 workers)
- 870 Industrial Rd San Carlos CA 94070 (Sep 29, 2025, 8 workers)
- Remote Remote CA 94080 (Sep 29, 2025, 1 workers)
- 870 Industrial Road San Carlos CA 94070 (Mar 13, 2025, 62 workers)
Where the notices landed
- San Mateo County5 notices, 119 workers
- San Carlos2 notices, 70 workers
- South San Francisco2 notices, 48 workers
- Remote1 notice, 1 workers
Local pages: San Mateo 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 Sutro Biopharma, Inc. the shortest gap shown is 1 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 Sutro Biopharma, 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 2024-2025 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.