Layoffs Tracker›Prothena Biosciences Inc
WARN Act · Public Record
Prothena Biosciences Inc
WARN Act filings on record for Prothena Biosciences Inc. Each filing represents a notice submitted to a state workforce agency for a qualifying mass layoff or plant closing.
1
filing
91
employees affected (total)
CA
state
All filings
Ordered by announcement date, most recent first. Source links open the original state agency record.
| State | Location | Employees | Announced | Effective |
|---|---|---|---|---|
| CA | San Mateo County | 91 | Jun 2, 2025 | Aug 1, 2025 |
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About this data: WARN Act filings are public records submitted to state workforce agencies when employers plan mass layoffs of 50+ employees or plant closings affecting 100+ workers. Some filings are later rescinded or modified — this tracker reflects raw filed data and may include filings that did not result in actual layoffs. Data is updated weekly from primary state agency sources.