8-K/AThe WireRed Alert
Executive Change
Filed May 7, 2026 · 1mo ago · Accession 0001315257-26-000030
Plain English
Material event — a significant development the company must disclose promptly.
Read the source below for the full document.
Filing details
- Company
- Koppers Holdings Inc.
- Ticker
- KOP
- CIK
- 1315257
- Form type
- 8-K/A
- Filing date
- May 7, 2026
- Report date
- Nov 5, 2025
- Document
- kop-20251105.htm
- Size
- 140 KB