Employer record, California WARN filings

Thermo Fisher Scientific Layoff Notices in California

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

Thermo Fisher Scientific: 36 notices, 1,494 workers, Oct 13, 2016 to Jan 27, 2026. 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.

Thermo Fisher Scientific layoff notices at a glance

Thermo Fisher Scientific has filed 36 WARN notices with the California Employment Development Department between Oct 13, 2016 and Jan 27, 2026, naming 1,494 workers. 4 were closures and 32 were layoffs; 35 permanent, 1 temporary. The largest single notice named 183 workers in San Diego County on Jan 31, 2023. Its latest notice, 173 workers in San Diego County dated Jan 27, 2026, was 2.9% of the 5,892 workers named in all 170 San Diego County notices of fiscal year 2025-2026. 17 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 dateEffectiveCountyCityWorkersTypeDays notice
Jan 27, 2026Mar 18, 2026San DiegoCarlsbad173Layoff, temporary50 under 60
Jul 29, 2025Sep 15, 2025San DiegoCarlsbad52Layoff, permanent48 under 60
Jul 29, 2025Sep 15, 2025San DiegoCarlsbad33Layoff, permanent48 under 60
Apr 29, 2025Jun 28, 2025Los AngelesCerritos11Closure, permanent60
Mar 28, 2024May 31, 2024San DiegoCarlsbad74Closure, permanent64
Nov 15, 2023Feb 1, 2024SonomaPetaluma74Layoff, permanent78
Jun 29, 2023Aug 27, 2023San DiegoCarlsbad66Layoff, permanent59 under 60
Jun 29, 2023Aug 27, 2023San DiegoCarlsbad27Layoff, permanent59 under 60
Jun 29, 2023Aug 27, 2023San DiegoCarlsbad5Layoff, permanent59 under 60
Jun 22, 2023Aug 22, 2023San MateoSouth San Francisco64Layoff, permanent61
Jun 22, 2023Aug 22, 2023AlamedaPleasanton38Layoff, permanent61
Jun 22, 2023Aug 22, 2023San DiegoSan Diego6Layoff, permanent61
Jun 22, 2023Aug 22, 2023San DiegoSan Diego2Layoff, permanent61
May 25, 2023Jul 22, 2023San DiegoCarlsbad33Layoff, permanent58 under 60
May 25, 2023Jun 26, 2023San DiegoCarlsbad32Layoff, permanent32 under 60
May 25, 2023Jul 24, 2023San DiegoCarlsbad8Layoff, permanent60
May 25, 2023Jun 26, 2023San DiegoCarlsbad6Layoff, permanent32 under 60
May 25, 2023Jul 22, 2023San DiegoCarlsbad3Layoff, permanent58 under 60
May 25, 2023Jun 19, 2023San DiegoCarlsbad2Layoff, permanent25 under 60
May 25, 2023Jun 19, 2023San DiegoCarlsbad2Layoff, permanent25 under 60
May 25, 2023Jun 27, 2023San DiegoCarlsbad1Layoff, permanent33 under 60
May 25, 2023Jun 23, 2023San DiegoCarlsbad1Layoff, permanent29 under 60
Apr 11, 2023Jun 10, 2023San DiegoSan Diego137Layoff, permanent60
Apr 11, 2023Jun 10, 2023San DiegoSan Diego52Layoff, permanent60
Apr 11, 2023Jun 10, 2023San DiegoSan Diego29Layoff, permanent60
Mar 7, 2023May 6, 2023San DiegoSan Diego123Layoff, permanent60
Mar 7, 2023May 6, 2023San DiegoSan Diego19Layoff, permanent60
Mar 7, 2023May 6, 2023San DiegoSan Diego12Layoff, permanent60
Jan 31, 2023Jan 31, 2023San DiegoSan Diego183Layoff, permanent0 under 60
Jan 31, 2023Jan 31, 2023San DiegoSan Diego32Layoff, permanent0 under 60
Jan 31, 2023Jan 31, 2023San DiegoSan Diego15Layoff, permanent0 under 60
Nov 15, 2022Jan 31, 2023San MateoSouth San Francisco49Layoff, permanent77
Nov 15, 2022Jan 31, 2023AlamedaPleasanton46Layoff, permanent77
Oct 13, 2016Sep 30, 2017San DiegoSan Diego44Closure, permanent352
Oct 13, 2016Mar 31, 2017Santa ClaraSanta Clara38Layoff, permanent169
Oct 13, 2016Dec 30, 2016Contra CostaHercules2Closure, permanent78

Sites named on the notices

  • 5781 Van Allen Way Carlsbad CA 92008 (Jan 27, 2026, 173 workers)
  • 5823 Newton Dr Carlsbad CA 92008 (Jul 29, 2025, 52 workers)
  • 11080 E Artesia Blvd, Suite A Cerritos CA 90703 (Apr 29, 2025, 11 workers)
  • 5791 Van Allen Way Carlsbad CA 92008 (Mar 28, 2024, 74 workers)
  • 2200 S McDowell Blvd Ext Petaluma CA 94954 (Nov 15, 2023, 74 workers)
  • 5823 Newton Drive Carlsbad CA 92008 (Jun 29, 2023, 27 workers)
  • 180 Oyster Point Blvd South San Francisco CA 94080 (Jun 22, 2023, 64 workers)
  • 6055 Sunol Blvd Building C Pleasanton CA 94566 (Jun 22, 2023, 38 workers)
  • 6190 Cornerstone Court San Diego CA 92121 (Jun 22, 2023, 6 workers)
  • 9440 Carroll Park Drive San Diego CA 92121 (Jun 22, 2023, 2 workers)
  • 9600 Kearny Villa Road San Diego CA 92126 (Apr 11, 2023, 29 workers)
  • 180 OYSTER POINT BLVD South San Francisco CA 94080 (Nov 15, 2022, 49 workers)
  • 6055 SUNOL BLVD BUILDING C Pleasanton CA 94566 (Nov 15, 2022, 46 workers)

Where the notices landed

Local pages: San Diego employment lawyer, Carlsbad 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 Thermo Fisher Scientific 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 marked temporary. A temporary layoff that runs past six months is treated as a termination under the federal Act, and the employer should issue a new notice before that point.

Full statute walk-through: the California 60-day rule, section by section.

If you work, or worked, at Thermo Fisher Scientific

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 2016-2017 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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