Total Workers Affected
16
Across all WARN notices
Employer · WARN Act history · Professional & Technical Services
Illumina, Inc. Worldwide Headquarters
16 workers across 3 WARN notices, primarily in CA - recorded in the current PlainLayoffs dataset.
- 16
- Workers cut
- 3
- WARN notices
- 1
- State
- 5
- Avg / notice
Illumina, Inc. Worldwide Headquarters has 3 recorded WARN filings affecting 16 workers
According to WARN Act filings submitted to state workforce agencies, Illumina, Inc. Worldwide Headquarters has 3 recorded filings covering 16 workers across 1 state, primarily CA, the 5,735th-largest recorded WARN footprint among 6,916 tracked employers. WARN only covers mass layoffs at employers with 100+ employees, so this is a floor on the employer's actual workforce changes.
The verdict
Illumina, Inc. Worldwide Headquarters put 16 workers on WARN notice across 3 filings - the 5,735th-largest WARN footprint of 6,916 tracked employers.
- #5,735
- of 6,916 employers by workers affected
- Top 83%
- larger than 17% of tracked employers
- 3
- Recorded WARN filings
- 1
- state affected, led by CA
Where Illumina, Inc. Worldwide Headquarters Falls Among Tracked Employers
6,916 employers with a WARN filing, bucketed by total workers affected
Number of Notices
3
Recorded WARN Act filings
Latest Event Date
Jan 2026
Most recent filing
Not all layoffs appear in WARN data, see our methodology for the federal + state coverage thresholds.
Reported Layoff Scale (by Workers Affected) 30.0%
16 workers across recorded WARN events, a raw count, not adjusted for the employer's total headcount.
WARN Notice History
2026
Mass Layoff
Illumina Way San Diego, CA · Manufacturing
Effective: Jan 14, 2026
4
workers
Filed Jan 14, 2026
2025
Mass Layoff
Illumina Way San Diego, CA · Professional & Technical Services
Effective: Nov 13, 2025
8
workers
Filed Nov 13, 2025
Mass Layoff
Illumina Way San Diego, CA · Professional & Technical Services
Effective: Nov 5, 2025
4
workers
Filed Nov 5, 2025
How Illumina, Inc. Worldwide Headquarters compares in Professional & Technical Services
| # | Employer | Workers cut | Notices | Lead state |
|---|---|---|---|---|
| 1 | 12,127 | 17 | CA | |
| 2 | Cisco Systems | 9,221 | 4 | CA |
| 3 | Salesforce | 7,406 | 4 | CA |
| 4 | STARTEK | 1,275 | 4 | VA |
| 5 | Alorica | 915 | 4 | VA |
| 6 | Charter Communications | 889 | 8 | WI |
| 7 | Intel Corporation | 865 | 6 | CA |
| 8 | Oracle America | 815 | 11 | CA |
| 9 | Illumina, Inc. Worldwide Headquarters (this page) | 16 | 3 | CA |
What this means for CA workers
Illumina, Inc. Worldwide Headquarters has 3 recorded WARN filings covering 16 workers, most recently on Jan 14, 2026.
- If you are affected, file for unemployment and contact your state's rapid-response program inside the WARN Act's 60-day notice window. What to do after a layoff
- Check whether the required notice pay was provided, the WARN Act can entitle workers to up to 60 days of pay when notice is skipped. Estimate WARN pay
- See recorded WARN notices in CA, where Illumina, Inc. Worldwide Headquarters's filings were reported. CA layoffs
WARN Act filings only capture layoffs of 50+ workers at sites of 100+ employees, so smaller reductions, contractor non-renewals, and voluntary separations are not shown here.
Reading the Illumina, Inc. Worldwide Headquarters WARN Record
Illumina, Inc. Worldwide Headquarters has 3 WARN Act filings in this dataset, covering 16 workers between Nov 5, 2025 and Jan 14, 2026. As with any WARN count, the true figure runs somewhat higher (why). By total workers affected, Illumina, Inc. Worldwide Headquarters ranks #417 of 630 tracked employers in CA. Among the 8 other Professional & Technical Services employers with recorded WARN filings, the median is 1,095 affected workers -- Illumina, Inc. Worldwide Headquarters's 16 sits well below that group's typical scale. Every recorded filing was reported to CA's workforce agency, in the Professional & Technical Services sector -- a single-state footprint, unlike the multi-state pattern common among larger employers.
Averaging 5 workers per notice, Illumina, Inc. Worldwide Headquarters's filings fall into a pattern that suggests targeted team or department cuts that still crossed the WARN reporting threshold. The 3 notices on file represent distinct events, each triggering a 60-day advance warning obligation that fed into state rapid-response systems.
Workers on CA-based Illumina, Inc. Worldwide Headquarters notices should contact the CA workforce agency directly, response teams, severance negotiation guidance, and TAA (Trade Adjustment Assistance) screening move fastest in the days immediately following a notice. See what to do after a layoff for the full benefits timeline. This record reflects filed notices only; subsequent hiring, rescinded closures, or facility reopenings are not tracked by WARN disclosures.
Frequently Asked Questions
Is Illumina, Inc. Worldwide Headquarters laying off workers? ▼
Illumina, Inc. Worldwide Headquarters has filed 3 WARN Act notices affecting 16 workers across 1 state. The most recent notice was filed on Jan 14, 2026.
How many people has Illumina, Inc. Worldwide Headquarters laid off? ▼
According to WARN Act filings, Illumina, Inc. Worldwide Headquarters has affected 16 workers total, averaging 5 workers per notice.
What states has Illumina, Inc. Worldwide Headquarters had layoffs in? ▼
Illumina, Inc. Worldwide Headquarters has filed WARN notices in 1 state: CA.
What is a WARN Act notice? ▼
The Worker Adjustment and Retraining Notification (WARN) Act requires employers with 100+ employees to provide 60 days advance notice of plant closings and mass layoffs affecting 50 or more workers. Not all layoffs require WARN notice.
What benefits are available after an Illumina, Inc. Worldwide Headquarters layoff? ▼
Workers affected by a WARN-notified layoff may be eligible for unemployment insurance, COBRA health coverage continuation, job retraining through the Trade Adjustment Assistance program, and severance packages if offered by the employer. State workforce agencies often provide additional rapid response services.
How does Illumina, Inc. Worldwide Headquarters's layoff history compare to the industry? ▼
Illumina, Inc. Worldwide Headquarters has affected 16 workers across 3 WARN filings in the Professional & Technical Services sector. The federal WARN Act only captures layoffs affecting 50 or more workers, so actual workforce changes may be larger.
Data sourced from official state WARN-Act layoff registries. See our methodology for details. Retrieved and formatted by PlainLayoffs Editorial
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from state WARN Act filings. Consult a qualified professional before making decisions based on this data.
Download the data behind this page
The full PlainLayoffs employer roster, covering every recorded employer including Illumina, Inc. Worldwide Headquarters, is available as CSV. Underlying WARN Act filings are public records; see our methodology for the compilation method.
Every figure on PlainLayoffs is rendered directly from public WARN Act filings and state workforce agency records, no number is typed in by an editor. This employer's notice history is rendered directly from state WARN Act filings. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026. A WARN filing is a legally required notice, not a judgment of a company's management or financial health; rankings here reflect filed notice volume only.
| Publisher | PlainLayoffs |
| Sources | Public state WARN-Act layoff registries |