Koppers Inc filed a WARN notice in 2026 with the state of South Carolina on February 20, 2026, laying off 66 employees effective April 21, 2026. This filing relates to Koppers Inc’s South Carolina operations and is sourced directly from official state WARN records.
Chemical Manufacturing
We provide fully integrated, sustainability-based product, services, and solutions to infrastructure industries around the world.
Website
www.koppers.com
Headquarters
Florence, South Carolina
66
Affected Employees
April 21, 2026
Layoff Date
February 20, 2026
Notice Date
