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Genentech — WARN Act layoff notices

Official state WARN filings by Genentech since 1988, normalized from state labor department sources. Latest notice: 2026-07-01.

Filed under 2 spellings in state records, merged on this page: Genentech, Inc. and Genentech.

16notices
2,587workers affected
1state
Notice dateStateLocationEmployeesEffective dateType
2026-07-01CaliforniaSan Mateo County1032026-07-29Layoff Permanent
2026-02-04CaliforniaSan Mateo County1412025-08-18Layoff Permanent
2025-10-27CaliforniaSan Mateo County1182025-11-28Layoff Permanent
2025-07-17CaliforniaSan Mateo County872025-09-15Layoff Permanent
2025-05-29CaliforniaSan Mateo County1432025-07-14Layoff Permanent
2024-08-22CaliforniaSan Mateo County932024-10-08Layoff Permanent
2024-04-09CaliforniaSan Mateo County4362024-06-05Layoff Permanent
2023-03-27CaliforniaSan Mateo County2712023-05-24Layoff Permanent
2021-11-10CaliforniaSan Mateo County522022-01-04Layoff Permanent
2020-07-24CaliforniaSouth San Francisco, San Mateo County4742020-09-18Layoff Permanent
2020-02-20CaliforniaSouth San Francisco, San Mateo County1142020-03-18Closure Permanent
2019-03-29CaliforniaSouth San, San Mateo County542019-05-16Layoff Permanent
2019-01-29CaliforniaSouth San, San Mateo County672019-03-29Layoff Permanent
2018-12-05CaliforniaSouth San, San Mateo County832018-12-19Layoff Permanent
2018-08-09CaliforniaSouth San, San Mateo County2232018-08-31Layoff Permanent
2017-11-01CaliforniaVacaville, Solano County1282017-12-31Layoff 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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