Below is a full breakdown of Horizon Therapeutics USA Inc’s layoff activity, including affected locations, employee totals by event. In 2026, the largest impact occurred in Maryland where 22 employees were affected.
Biotechnology Research
In October 2023, Amgen completed its $27.8 billion acquisition of Horizon Therapeutics. After the acquisition closed, Amgen began migrating Horizon’s web presence to Amgen’s main domain. As part of that transition, horizontherapeutics.com now automatically redirects to amgen.com. Amgen discovers, develops, manufactures and delivers innovative medicines to fight some of the world’s toughest diseases. Harnessing the best of biology and technology, Amgen reaches millions of patients with its medicines, helping make people’s lives easier, fuller and longer.
Website
www.horizontherapeutics.com
Headquarters
Suite 325 Rockville, Maryland
1
Total Events
22
Employees Affected
1
States Affected
| Company Name | City | State | Affected Employees | Notice Date | Layoff Date |
|---|---|---|---|---|---|
| Horizon Therapeutics USA Inc | Suite 325 Rockville | Maryland | 22 | Mar 9, 2026 | May 8, 2026 |
Events and employees affected by month
1 state reported
