Onsemi layoff notices at a glance
Onsemi has filed 2 WARN notices with the California Employment Development Department between Sep 19, 2022 and Mar 12, 2025, naming 139 workers. 1 was a closure and 1 was a layoff; 2 permanent, 0 temporary. The largest single notice named 88 workers in Santa Clara County on Sep 19, 2022. Its latest notice, 51 workers in Santa Clara County dated Mar 12, 2025, was 0.6% of the 8,183 workers named in all 179 Santa Clara County notices of fiscal year 2024-2025. 1 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 |
|---|---|---|---|---|---|---|
| Mar 12, 2025 | May 11, 2025 | Santa Clara | San Jose | 51 | Layoff, permanent | 60 |
| Sep 19, 2022 | Nov 17, 2022 | Santa Clara | San Jose | 88 | Closure, permanent | 59 under 60 |
Sites named on the notices
- 150 Rose Orchard Way San Jose CA 95134 (Mar 12, 2025, 51 workers)
- 1704 Automation Pkwy San Jose CA 95131 (Sep 19, 2022, 88 workers)
Where the notices landed
- Santa Clara County2 notices, 139 workers
- San Jose2 notices, 139 workers
Local pages: San Jose employment lawyer, Santa Clara 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 Onsemi the shortest gap shown is 59 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 Onsemi
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 2022-2023 to 2024-2025. 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.