US WARN layoff notices › Employers › O › Onsemi

Onsemi — WARN Act layoff notices

Official state WARN filings by Onsemi since 1988, normalized from state labor department sources. Latest notice: 2025-03-12.

3notices

192workers affected

2states

Notice date	State	Location	Employees	Effective date	Type
2025-03-12	California	Santa Clara County	51	2025-05-11	Layoff Permanent
2024-06-13	Maine	South Portland, Running Hill rd; South Portland, Maine 04106	53	—	WARN
2022-09-20	California	Santa Clara County	88	2022-11-17	Closure 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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