Arsenal Biosciences Layoffs
Location South San Francisco, CA · United States · Subscribe (RSS)
1
Layoff round
100
Employees laid off
—
Funding stage
—
Total raised
Arsenal Biosciences has 1 publicly reported layoff round on record (most recent September 16, 2025). A total of about 100 employees were affected across these rounds.
Layoff history
September 16, 2025WARN notice
Arsenal Biosciences cut 100 employees
100 laid off Location South San Francisco, CA Effective November 14, 2025 Facility 329 Oyster Point Blvd. South San Francisco CA 94080
Arsenal Biosciences disclosed a workforce reduction affecting its South San Francisco, CA operations in September 16, 2025. Approximately 100 roles were eliminated.
Reason: Layoff Permanent
Data for Arsenal Biosciences is compiled from public WARN Act filings and reporting linked above. See our methodology.