Horizon Therapeutics, a subsidiary of Amgen, will lay off employees at its facility in Rockville, Maryland. The filing indicates that 22 employees will be affected.
Horizon Therapeutics to Lay Off Employees
Horizon Therapeutics USA, Inc. has filed a WARN notice on March 9, 2026. The notice states that the company will conduct a permanent layoff at its facility at 9605 Medical Center Drive, Suite 325, in Rockville. The layoffs are scheduled to begin on May 8, 2026.
The notice was filed under the Worker Adjustment and Retraining Notification (WARN) Act. It requires employers to give advance notice of large-scale layoffs or the closure of facilities. This allows workers and local governments to make preparations in case of employment transitions.
Horizon Therapeutics specializes in medicines for rare and rheumatic diseases. Amgen acquired Horizon Therapeutics in October 2023 in a $27.8 billion deal. Following the acquisition, Horizon’s therapies and research programs were integrated into Amgen’s broader portfolio.
Amgen is a global biotechnology company that develops medicines for serious illnesses. The company works on medicines that treat serious illnesses like oncology, cardiovascular disease, inflammation, and rare diseases.
Amgen has research and manufacturing plants in a number of countries and has multiple employees around the world as a part of its international network of biopharmaceutical companies.
The filing provides advance notice of the job cuts at the Rockville facility. No additional details about the layoffs were included in the filing.
