US WARN layoff notices › Employers › I › Illumina

Illumina — WARN Act layoff notices

Official state WARN filings by Illumina since 1988, normalized from state labor department sources. Latest notice: 2026-01-23.

Filed under 4 spellings in state records, merged on this page: Illumina Inc. World Headquarters; Illumina, Inc Worldwide Headquarters; Illumina, Inc. Worldwide Headquarters.

33notices
1,125workers affected
1state
Notice dateStateLocationEmployeesEffective dateType
2026-01-23CaliforniaSan Diego County12026-03-09Layoff Permanent
2026-01-23CaliforniaSan Diego County42026-03-16Layoff Permanent
2025-12-23CaliforniaSan Diego County12025-12-22Layoff Permanent
2025-12-12CaliforniaSan Diego County72025-12-08Layoff Permanent
2025-12-04CaliforniaSan Diego County32026-02-17Layoff Permanent
2025-11-21CaliforniaSan Diego County72026-01-19Layoff Permanent
2025-11-14CaliforniaSan Diego County82025-11-11Layoff Permanent
2025-11-07CaliforniaSan Diego County282026-01-05Layoff Permanent
2025-11-06CaliforniaSan Diego County42026-01-05Layoff Permanent
2025-04-17CaliforniaSan Diego County1722025-06-16Layoff Permanent
2025-02-13CaliforniaSan Diego County962025-04-14Layoff Permanent
2024-09-05CaliforniaSan Diego County32024-11-06Layoff Permanent
2024-08-01CaliforniaSan Diego County492024-10-01Layoff Permanent
2024-01-29CaliforniaSan Diego County1112024-03-12Layoff Permanent
2023-09-14CaliforniaSan Mateo County12023-09-06Layoff Permanent
2023-08-15CaliforniaSan Diego County752023-08-14Layoff Permanent
2023-08-15CaliforniaSan Mateo County142023-08-14Layoff Permanent
2023-08-15CaliforniaAlameda County32023-08-14Layoff Permanent
2023-08-15CaliforniaSan Diego County762023-08-14Layoff Permanent
2023-07-13CaliforniaSan Diego County142023-07-21Layoff Permanent
2023-07-13CaliforniaAlameda County12023-07-21Layoff Permanent
2023-07-13CaliforniaSan Mateo County712023-07-21Layoff Permanent
2023-07-13CaliforniaSan Diego County642023-07-21Layoff Permanent
2023-02-01CaliforniaSan Diego County12023-03-24Layoff Permanent
2022-11-30CaliforniaSan Diego County12023-01-13Layoff Permanent
2022-11-30CaliforniaAlameda County42023-01-13Layoff Permanent
2022-11-30CaliforniaSan Diego County2062023-01-13Layoff Permanent
2022-11-30CaliforniaSan Mateo County202023-01-13Layoff Permanent
2019-12-06CaliforniaFoster City, San Mateo County192019-11-05Layoff Unknown at this time
2018-02-13CaliforniaSan Francisco, San Francisco32018-04-13Layoff Unknown at this time
2018-02-13CaliforniaSanta Clara, Santa Clara22018-04-13Layoff Unknown at this time
2018-02-13CaliforniaSan Diego, San Diego County552018-04-13Layoff Unknown at this time
2018-02-12CaliforniaHayward, Alameda County12018-04-13Layoff Permanent

Source: state WARN Act disclosures, normalized in the free US WARN notices dataset (CSV/JSON, no login, no delay, notices 1988+). WARN notices are advance notifications of plant closings and mass layoffs; actual layoff counts and dates can change after filing.

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