DEF 14AThe Ballot
Koppers Holdings Inc. files DEF 14A
Filed Mar 27, 2026 · 3mo ago · Accession 0001315257-26-000026
Plain English
Proxy statement — executive pay, board nominees, and shareholder votes.
Read the source below for the full document.
Filing details
- Company
- Koppers Holdings Inc.
- Ticker
- KOP
- CIK
- 1315257
- Form type
- DEF 14A
- Filing date
- Mar 27, 2026
- Report date
- May 7, 2026
- Document
- kop-20260327.htm
- Size
- 8.3 MB