Employer record, California WARN filings

Illumina, Inc. Layoff Notices in California

Benjamin Eghbali, Esq.Legal notes by Benjamin Eghbali, Esq.

Illumina, Inc.: 26 notices, 797 workers, Feb 12, 2018 to Dec 22, 2025. Every filing the EDD has on record, with the 60-day notice math.

Every WARN notice filed with the California EDD since July 2014: 17,562 notices, 8,284 employers, 1,453,182 workers.

Illumina, Inc. layoff notices at a glance

Illumina, Inc. has filed 26 WARN notices with the California Employment Development Department between Feb 12, 2018 and Dec 22, 2025, naming 797 workers. All were layoffs rather than closures; 22 permanent, 0 temporary, 4 with the type left blank. The largest single notice named 206 workers in San Diego County on Nov 14, 2022. Its latest notice, 1 workers in San Diego County dated Dec 22, 2025, was 0% of the 5,892 workers named in all 170 San Diego County notices of fiscal year 2025-2026. 8 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 dateEffectiveCountyCityWorkersTypeDays notice
Dec 22, 2025Dec 22, 2025San DiegoSan Diego1Layoff, permanent0 under 60
Dec 11, 2025Dec 8, 2025San DiegoSan Diego7Layoff, permanent3 days after effective date
Dec 4, 2025Feb 17, 2026San DiegoSan Diego3Layoff, permanent75
Nov 20, 2025Jan 19, 2026San DiegoSan Diego7Layoff, permanent60
Nov 6, 2025Jan 5, 2026San DiegoSan Diego28Layoff, permanent60
Feb 12, 2025Apr 14, 2025San DiegoSan Diego96Layoff, permanent61
Sep 4, 2024Nov 6, 2024San DiegoSan Diego3Layoff, permanent63
Jul 31, 2024Oct 1, 2024San DiegoSan Diego49Layoff, permanent62
Jan 11, 2024Mar 12, 2024San DiegoSan Diego111Layoff, permanent61
Aug 7, 2023Sep 6, 2023San MateoSan Mateo1Layoff, permanent30 under 60
Jul 13, 2023Aug 14, 2023San DiegoSan Diego76Layoff, permanent32 under 60
Jul 13, 2023Aug 14, 2023San MateoSan Mateo14Layoff, permanent32 under 60
Jul 13, 2023Aug 14, 2023AlamedaHayward3Layoff, permanent32 under 60
Jun 21, 2023Jul 21, 2023San MateoFoster City71Layoff, permanent30 under 60
Jun 21, 2023Jul 21, 2023San DiegoSan Diego14Layoff, permanent30 under 60
Jun 21, 2023Jul 21, 2023AlamedaHayward1Layoff, permanent30 under 60
Jan 23, 2023Mar 24, 2023San DiegoSan Diego1Layoff, permanent60
Nov 14, 2022Jan 13, 2023San DiegoSan Diego206Layoff, permanent60
Nov 14, 2022Jan 13, 2023San MateoSan Mateo20Layoff, permanent60
Nov 14, 2022Jan 13, 2023AlamedaHayward4Layoff, permanent60
Nov 14, 2022Jan 13, 2023San DiegoSan Diego1Layoff, permanent60
Aug 30, 2019Nov 5, 2019San MateoFoster City19Layoff, type not stated67
Feb 12, 2018Apr 13, 2018San DiegoSan Diego55Layoff, type not stated60
Feb 12, 2018Apr 13, 2018San FranciscoSan Francisco3Layoff, type not stated60
Feb 12, 2018Apr 13, 2018Santa ClaraSanta Clara2Layoff, type not stated60
Feb 12, 2018Apr 13, 2018AlamedaHayward1Layoff, permanent60

Sites named on the notices

  • 5200 Illumina Way San Diego CA 92122 (Dec 22, 2025, 1 workers)
  • 200 Lincoln Centre Drive San Mateo CA 94404 (Aug 7, 2023, 1 workers)
  • 4795 Executive Drive San Diego CA 92121 (Jul 13, 2023, 76 workers)
  • 25861 Industrial Blvd. Hayward CA 94545 (Jul 13, 2023, 3 workers)
  • 200 Lincoln Centre Drive Foster City CA 94404 (Jun 21, 2023, 71 workers)
  • 25861 Industrial Blvd Hayward CA 94545 (Jun 21, 2023, 1 workers)

Where the notices landed

Local pages: San Diego employment lawyer, San Mateo employment lawyer, Hayward employment lawyer, San Diego County employment law guide, 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 Illumina, Inc. the shortest gap shown is 0 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.

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 2017-2018 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.

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