Employer · WARN Act history · Manufacturing
Horizon Therapeutics USA
22 workers across 1 WARN notice, primarily in MD - recorded in the current PlainLayoffs dataset.
- 22
- Workers cut
- 1
- WARN notice
- 1
- State
- 22
- Avg / notice
Horizon Therapeutics USA has 1 recorded WARN filing affecting 22 workers
According to WARN Act filings submitted to state workforce agencies, Horizon Therapeutics USA has 1 recorded filing covering 22 workers across 1 state, primarily MD, the 5,608th-largest recorded WARN footprint among 7,009 tracked employers. WARN notices cover qualifying reported events, so this record is not a complete count of the employer's workforce changes.
Horizon Therapeutics USA is a minor share of Manufacturing WARN activity — under 0.1% of the sector's 211,445 workers across 776 employers, ranking #677 in Manufacturing.
DOL WARN employer filing desk
Employer HORIZON-THER · Horizon Therapeutics USA 22 workers · 1 filings
NOTC-SINGLE · WORK-LIGHT · PHOTO-UNK · RUNWAY-EXACT · STAT-SINGLE · BOOK-SINGLE · TYPE-LAYOFF
- NOTC-SINGLE 1 filing
- WORK-LIGHT #5,608
- PHOTO-UNK No peer
- RUNWAY-EXACT 60d
- STAT-SINGLE MD
- BOOK-SINGLE 1 agency
- TYPE-LAYOFF 1 layoff
Stamps derive from filed notice_date, effective_date, workers_affected, state agency source, and filing type in this dataset, not a prediction of future layoffs.
Employer Profile
Not all layoffs appear in WARN data, see our methodology for the federal + state coverage thresholds. Latest filing: Mar 2026.
WARN Notice History
2026
Montgomery County, MD · Manufacturing
Effective: May 8, 2026
22
workers
Filed Mar 9, 2026
Four checks on this Horizon Therapeutics USA filing
What is the largest Horizon Therapeutics USA WARN filing on record? ▼
The largest row is the mass layoff filed for Montgomery County, MD on Mar 9, 2026, covering 22 workers in Manufacturing.
Where were Horizon Therapeutics USA's WARN notices filed? ▼
This is a one-event record from Maryland DLLR; the named location is Montgomery County, not a company-wide headcount change. States represented in this record: MD.
Does Horizon Therapeutics USA's filing history show a recurring pattern? ▼
One filing cannot establish a recurring layoff cadence. It records a specific WARN-covered event and should not be read as a forecast of this employer's workforce.
How much advance notice appears in Horizon Therapeutics USA's record? ▼
The measurable notice runway lands exactly on the federal 60-day baseline; verify the source dates before treating that timing as final.
See also: MD WARN filings · Manufacturing industry WARNs · WARN Act guide
Source: State WARN Act layoff registries Horizon Therapeutics USA notice history aggregated from state workforce agency filings · September 2026 A WARN filing is a required notice, not a judgment of the employer's management or finances. Coverage follows states with structured public registries; this public-record summary is not legal advice, financial advice, or employment advice.
Every figure on PlainLayoffs is rendered directly from public WARN Act filings and state workforce agency records, no number is typed in by an editor. This employer's notice history is rendered directly from state WARN Act filings. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 2026. A WARN filing is a legally required notice, not a judgment of a company's management or financial health; rankings here reflect filed notice volume only.