Koppers Holdings Inc.
Public company- Headquarters
- PITTSBURGH, Pennsylvania
- Ticker
- KOP
- CIK
- 0001315257
WARN notices since 2024
1
First: Apr 21, 2026
Workers affected since 2024
66
Across 1 notice
Executive changes, last 12 months
0
0 appointments, 0 departures
Last event
Apr 21, 2026
WARN noticeWARN notice: Florence, SC
Workers affected over time
Cumulative workers in WARN notices since 2024
Not enough notices to chart yet.
Leadership
No executive changes on record.
Related companies
Same industry and state, with recent events.
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WARN notice: Jasper, TX
- TREX CO INC
Senior Vice President and Chief Commercial Officer appointed: Brian J. Taylor
- WARN notice
WARN notice: Florence, SC
Koppers Inc. filed a WARN notice with the South Carolina WARN list on Apr 21, 2026 covering 66 workers in Florence.
Source: South Carolina WARN list, filed Apr 21, 2026Site: Florence, SC
Workers affected: 66
Only one public record so far. We add events as soon as a new filing lands; watch Koppers Holdings Inc. to get them in your digest.
Last verified Nov 7, 2026