Recent News

• 04.25.2025 - Koppers Holdings Inc. Schedules First Quarter 2025 Conference Call
• 03.31.2025 - Koppers Holdings Announces Availability of 2024 Annual Report
• 03.20.2025 - Sidoti Small Cap Conference

Recent Filings

• 04.23.2025 - SCHEDULE 13G/A Statement of Beneficial Ownership by Certain Investors
• 04.14.2025 - 4 Statement of changes in beneficial ownership of securities
• 04.11.2025 - DEFA14A Additional definitive proxy soliciting materials and Rule 14(a)(12) material
• 03.28.2025 - DEF 14A Other definitive proxy statements
• 03.28.2025 - ARS Annual Report to Security Holders
• 03.26.2025 - 4 Statement of changes in beneficial ownership of securities
• 03.26.2025 - 4 Statement of changes in beneficial ownership of securities
• 03.26.2025 - 4 Statement of changes in beneficial ownership of securities
• 03.26.2025 - 4 Statement of changes in beneficial ownership of securities
• 03.26.2025 - 4 Statement of changes in beneficial ownership of securities