Mass-layoff and plant-closure filings reported by Horizon Therapeutics USA Inc in 2026, sourced from official state WARN records.
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.
1 filings in 2026
Filings
1
WARN notices so far
Workers affected
22
in 2026 so far
States
1
Top state
Maryland
22 affected
Peak month
May
22 affected
Horizon Therapeutics USA Inc layoffs month by month in 2026
Workers affected by the month each layoff took effect.
All Horizon Therapeutics USA Inc filings in 2026
Every WARN notice on record for this year, newest first.
Horizon Therapeutics USA Inc layoffs by state in 2026
1 states reported Horizon Therapeutics USA Inc layoffs, ranked by workers affected. Open a state for its full history.