Amgen has a WARN Act filing history stretching from July 2009 to September 2023, with 4 notices affecting 383 employees in total. Filings span California (2) and Washington (2). Notices include 3 facility closures and 1 layoff. The largest single filing affected 274 employees in Seattle, WA (December 2014). There have been no new filings in the past 12 months.

Under the WARN Act (Worker Adjustment and Retraining Notification Act), employers with 100 or more employees are required to provide 60 days advance notice before conducting plant closures or mass layoffs. These notices are filed with state labor departments and are public record.

Layoff History

Employees affected over time

All WARN Act Notices

Location	Effective Date	Employees	Type
San Carlos, CA	Sep 1, 2023	4	closure
San Carlos, CA	Aug 31, 2023	4	closure
Seattle, WA	Dec 31, 2014	274	closure
Bothell, WA	Jul 13, 2009	101	layoff

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