Illumina has 6 WARN notices on file in California since February 2025, covering 142 workers, according to official state records. The most recent notice was recorded on Dec 23, 2025, with an effective date of Dec 22, 2025.
WARN notices cover planned layoffs and closures that meet the legal thresholds at a single site, so they do not show every job cut. Checked every hour.
Illumina layoffs over time
Workers affected each month. Hover or tap a bar.
Hover or tap a month to see the details.
Sources: SEC filings, company statements and state WARN notices. Announced cuts and WARN notices can describe the same layoff.
Every Illumina WARN notice
| Date | State | Location | Workers | Type | Effective |
|---|---|---|---|---|---|
| Dec 23, 2025 | CA | San Diego County | 1 | Layoff Permanent | Dec 22, 2025 |
| Dec 12, 2025 | CA | San Diego County | 7 | Layoff Permanent | Dec 8, 2025 |
| Dec 4, 2025 | CA | San Diego County | 3 | Layoff Permanent | Feb 17, 2026 |
| Nov 21, 2025 | CA | San Diego County | 7 | Layoff Permanent | Jan 19, 2026 |
| Nov 7, 2025 | CA | San Diego County | 28 | Layoff Permanent | Jan 5, 2026 |
| Feb 13, 2025 | CA | San Diego County | 96 | Layoff Permanent | Apr 14, 2025 |
Date is when the state received or processed the notice. Company names and locations as filed.
Illumina layoffs FAQ
How many people has Illumina laid off?
According to WARN notices filed in California, Illumina has reported layoffs or closures affecting 142 workers in 6 notices since February 2025. WARN notices only cover qualifying layoffs at a single site, so the company total may be different.
When was the latest Illumina WARN notice?
The most recent notice in our records is dated Dec 23, 2025 and covers 1 worker in San Diego County, with an effective date of Dec 22, 2025.
Where does this Illumina layoff data come from?
From the official WARN notice records published by California state agencies, which we check twice a day. Each notice is shown as filed.
Other recent WARN notices in California
- Levy layoffs (latest notice Oct 28, 2026)
- Artiva Biotherapeutics layoffs (latest notice Oct 28, 2026)
- Walt Disney Parks & Resorts US layoffs (latest notice Oct 27, 2026)
- Tawa layoffs (latest notice Oct 27, 2026)
- Intel layoffs (latest notice Oct 22, 2026)
- 24Hr Homecare layoffs (latest notice Oct 22, 2026)
Related
- Layoffs by company: all employers we track
- Layoffs today
- WARN notices tracker by state
- Layoff notice requirements by state
- How to negotiate severance
- Health insurance and COBRA after a layoff
Sources
Illumina layoffs on the map, 2026
WARN notices filed by Illumina with the states we track. Tap a state to see each notice.
Tap a red state for details.
California: 5 workers, 2 notices
- Jan 23 · San Diego County · 1 workers · Layoff Permanent
- Jan 23 · San Diego County · 4 workers · Layoff Permanent
Illumina WARN notices by month, 2026
Source: WARN notices published by state labor departments, collected by GoLayoffs. WARN counts workers at specific sites and does not include every job cut a company announces. See all notices in the WARN tracker.