US WARN layoff notices › Employers › A › Amgen
Official state WARN filings by Amgen since 1988, normalized from state labor department sources. Latest notice: 2023-07-17.
| Notice date | State | Location | Employees | Effective date | Type |
|---|---|---|---|---|---|
| 2023-07-17 | California | San Mateo County | 4 | 2023-09-01 | Closure Permanent |
| 2023-03-17 | California | Ventura County | 425 | 2023-05-26 | Layoff Permanent |
| 2023-02-01 | California | Ventura County | 305 | 2023-03-31 | Layoff Permanent |
| 2022-07-08 | California | Alameda County | 2 | 2022-12-02 | Closure Permanent |
| 2021-05-06 | California | Newbury Park, Ventura County | 61 | 2021-07-09 | Layoff Permanent |
| 2021-02-23 | California | Thousand Oaks, Ventura County | 531 | 2021-04-02 | Layoff Permanent |
| 2021-02-10 | California | Newbury Park, Ventura County | 531 | 2021-04-02 | Layoff Permanent |
| 2019-10-31 | California | Thousand Oaks, Ventura County | 172 | 2019-12-31 | Layoff Permanent |
| 2017-11-02 | California | Thousand Oaks, Ventura County | 121 | 2017-12-31 | Layoff Permanent |
| 2017-04-12 | California | Thousand Oaks | 494 | 2017-06-16 | Layoff Permanent |
| 2014-10-28 | California | Newbury Park | 349 | 2014-12-22 | Layoff Permanent |
| 2014-10-22 | Washington | Seattle | 274 | 2014-12-31 | Closure |
| 2009-05-14 | Washington | Bothell | 101 | 2009-07-13 | Layoff |
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.
