Koppers Holdings Inc (KOP)

Koppers Publishes 2025 Corporate Sustainability Report Highlighting Record Safety and Emissions Performance and Refreshed 2030 Strategy

Koppers Publishes 2025 Corporate Sustainability Report Highlighting Record Safety and Emissions Performance...

Form 4 - Statement of changes in beneficial ownership of securities

Form 4 - Statement of changes in beneficial ownership of securities

Form 4 - Statement of changes in beneficial ownership of securities

Sidoti Events, LLC's June Small-Cap Virtual Conference

NEW YORK, NY / ACCESS Newswire / June 16, 2026 / Sidoti Events, LLC, an affiliate of Sidoti & Company, LLC, has released the presentation...

Koppers Announces Participation in Upcoming June Investor Conferences

Koppers Announces Participation in Upcoming June Investor Conferences PR Newswire PITTSBURGH, June 15...

Koppers Management Participating in Wells Fargo Industrials & Materials Conference

Koppers Management Participating in Wells Fargo Industrials & Materials Conference PR Newswire...

Form 4 - Statement of changes in beneficial ownership of securities

Form 4 - Statement of changes in beneficial ownership of securities

Form 3 - Initial statement of beneficial ownership of securities

Koppers Management Participating in Barrington Research Spring Investment Conference

Koppers Management Participating in Barrington Research Spring Investment Conference PR Newswire...

Form SCHEDULE 13D - General Statement of Acquisition of Beneficial Ownership

Koppers Management Participating in Barclays Leveraged Finance Conference

Koppers Management Participating in Barclays Leveraged Finance Conference PR Newswire PITTSBURGH, May 15...

Form 4 - Statement of changes in beneficial ownership of securities

Form 4 - Statement of changes in beneficial ownership of securities