Koppers Inc. Layoffs & WARN Notices — WARN Index

Koppers Inc.: 3 WARN layoff notices since 2016, affecting 160 workers in 3 states. Latest filing February 20, 2026.

WARN notices filed by Koppers Inc.

• Koppers Inc.: Florence, SC · 66 workers · February 20, 2026
• Koppers, Inc.: Follansbee, WV · 48 workers · June 4, 2019
• Koppers Inc.: Clairton, PA · 46 workers · June 1, 2016

Layoffs in: Pennsylvania · South Carolina · West Virginia