Illumina, Inc. Worldwide Headquarters layoff notices at a glance
Illumina, Inc. Worldwide Headquarters has filed 6 WARN notices with the California Employment Development Department between Jul 13, 2023 and Jan 14, 2026, naming 264 workers. All were layoffs rather than closures; 6 permanent, 0 temporary. The largest single notice named 172 workers in San Diego County on Apr 17, 2025. Its latest notice, 4 workers in San Diego County dated Jan 14, 2026, was 0.1% of the 5,892 workers named in all 170 San Diego County notices of fiscal year 2025-2026. 2 of the notices show fewer than 60 days between the notice date and the effective date (see how to read this). 1 notice carries a notice date later than the effective date it announces, which usually means the letter reached the EDD after the separations had begun.
Every notice, newest first
| Notice date | Effective | County | City | Workers | Type | Days notice |
|---|---|---|---|---|---|---|
| Jan 14, 2026 | Mar 16, 2026 | San Diego | San Diego | 4 | Layoff, permanent | 61 |
| Jan 14, 2026 | Mar 9, 2026 | San Diego | San Diego | 1 | Layoff, permanent | 54 under 60 |
| Nov 13, 2025 | Nov 11, 2025 | San Diego | San Diego | 8 | Layoff, permanent | 2 days after effective date |
| Nov 5, 2025 | Jan 5, 2026 | San Diego | San Diego | 4 | Layoff, permanent | 61 |
| Apr 17, 2025 | Jun 16, 2025 | San Diego | San Diego | 172 | Layoff, permanent | 60 |
| Jul 13, 2023 | Aug 14, 2023 | San Diego | San Diego | 75 | Layoff, permanent | 32 under 60 |
Sites named on the notices
- 5200 Illumina Way San Diego CA 92122 (Jan 14, 2026, 4 workers)
Also filed as: Illumina, Inc Worldwide Headquarters.
Where the notices landed
- San Diego County6 notices, 264 workers
- San Diego6 notices, 264 workers
Local pages: San Diego employment lawyer, San Diego 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 Illumina, Inc. Worldwide Headquarters the shortest gap shown is 32 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.
One notice is dated after the effective date on the same filing. Notice given after the layoff has started is the clearest case the statute addresses: section 1402 counts every day between the separation and the notice as a day owed, up to 60.
Full statute walk-through: the California 60-day rule, section by section.
If you work, or worked, at Illumina, Inc. Worldwide Headquarters
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 2023-2024 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.