| 2026-08-06 | Earnings deck | Download Presentation |
| 2026-08-06 | Press release | KOPPERS REPORTS SECOND QUARTER 2026 RESULTS |
| 2026-08-06 | Press release | Koppers Management Meeting with Financial Community in Montreal and Toronto |
| 2026-08-05 | Press release | Koppers Holdings Inc. Declares Quarterly Cash Dividend |
| 2026-07-23 | Press release | Koppers Holdings Inc. Schedules Second Quarter 2026 Conference Call |
| 2026-06-25 | Press release | Koppers Publishes 2025 Corporate Sustainability Report Highlighting Record Safety and Emissions Performance and Refreshe |
| 2026-06-15 | Presentation | KOP Presentation Singular Research Conference |
| 2026-06-15 | Press release | Koppers Announces Participation in Upcoming June Investor Conferences |
| 2026-06-11 | Presentation | KOP Presentation Sidoti Conference |
| 2026-06-11 | Presentation | KOP Presentation Wells Fargo Conference |
| 2026-06-08 | Press release | Koppers Management Participating in Wells Fargo Industrials & Materials Conference |
| 2026-05-27 | Presentation | KOP Presentation Barrington Research Conference |
| 2026-05-22 | Press release | Koppers Management Participating in Barrington Research Spring Investment Conference |
| 2026-05-15 | Press release | Koppers Management Participating in Barclays Leveraged Finance Conference |
| 2026-05-11 | Press release | Koppers Announces Appointment of Eric Brenner as Chief Financial Officer and Treasurer |
| Press release | Download Earnings Release |
| 2026-05-08 | Press release | Koppers Announces Conditional Plan to Discontinue Production Activities at Facility in Stickney, Illinois |
| Press release | Koppers Holdings Inc. Schedules First Quarter 2026 Conference Call |
| 2026-04-15 | Presentation | KOP Presentation March-April 2026 |
| 2026-02-26 | Press release | KOPPERS REPORTS FOURTH QUARTER AND FULL-YEAR 2025 RESULTS; PROVIDES 2026 OUTLOOK |
| 2026-01-29 | Press release | Koppers Holdings Inc. Schedules Fourth Quarter and Full-Year 2025 Conference Call |
| 2025-11-20 | Presentation | KOP Presentation SW IDEAS |
| Press release | Download Earnings Release |
| 2025-11-07 | Presentation | Download Presentation |
| Press release | Koppers Holdings Inc. Schedules Third Quarter 2025 Conference Call |
| Press release | Download Earnings Release |
| Press release | Koppers Holdings Inc. Schedules Second Quarter 2025 Conference Call |
| Press release | Download Earnings Release |
| Press release | Koppers Holdings Inc. Schedules First Quarter 2025 Conference Call |
| 2025-02-27 | Press release | Download Earnings Release |
| 2025-02-27 | Press release | Koppers Holdings Inc. Schedules Fourth Quarter and Full-Year 2024 Conference Call |
| 2024-11-08 | Press release | Download Earnings Release |
| 2024-11-08 | Press release | Koppers Reports Third Quarter 2024 Results; Reaffirms 2024 Outlook |
| 2024-10-25 | Press release | Koppers Holdings Inc. Schedules Third Quarter 2024 Conference Call |
| 2024-08-08 | Earnings deck | Koppers Q2 2024 Results |
| 2024-08-08 | Press release | Download Earnings Release |
| 2024-07-25 | Press release | Koppers Holdings Inc. Schedules Second Quarter 2024 Conference Call |
| 2024-05-03 | Press release | Koppers Reports First Quarter 2024 Results; Provides Updated 2024 Outlook |
| 2024-02-28 | Press release | Koppers Reports Fourth Quarter and Full-Year 2023 Results; Provides 2024 Outlook |
| 2023-11-03 | Press release | Koppers Reports Third Quarter 2023 Results; Reaffirms 2023 Outlook |