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REPORTED · WARN NOTICE✓ VERIFIEDAdded Jul 27, 2026

Illumina, Inc. Layoff — August 2023

SOURCEOFFICIAL FILINGCalifornia Employment Development Department· filed July 13, 2023View the filing ↗

EMPLOYEES AFFECTED
168
SHARE OF WORKFORCE
~3.4%
EFFECTIVE DATE
Aug 14, 2023
168 OF 5,000 EMPLOYEES

What we know

Location: Illumina Way San Diego, CA · 4 locations (San Diego County).

A WARN notice for this layoff is recorded on July 13, 2023.

Disclosed through an official WARN filing with the CA state workforce agency.

Summary

Illumina, Inc. disclosed this layoff in an official WARN (Worker Adjustment and Retraining Notification) notice recorded by the CA state workforce agency on July 13, 2023. The notice covers 168 employees in Illumina Way San Diego, CA (San Diego County), with the layoff effective August 14, 2023.

The state lists each affected employee separately by work location, so this filing spans 4 CA communities: Executive Drive San Diego, Hayward, Illumina Way San Diego, Lincoln Centre Drive San Mateo.

That is roughly 3.4% of the 5,000 people Illumina, Inc. employs.

LayoffTalk has tracked 20 layoff events at Illumina, Inc. since January 2023, including 1,041 jobs documented in official WARN filings, with 3 additional events known from news reporting.

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SOURCE
Official WARN notice
View state filing ↗
I
Illumina, Inc.ILMN
Health Care · 5,000 employees
20
EVENTS TRACKED
1,041
JOBS IN WARN FILINGS
View company profile

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CREATED JUL 27, 2026LAST UPDATED AUG 11, 2026