Koppers Has Released our 2025 Annual Report!

SEC Filings
Filing date Form Description Filing Group View
4 Statement of changes in beneficial ownership of securities
3,4,5
4 Statement of changes in beneficial ownership of securities
3,4,5
4 Statement of changes in beneficial ownership of securities
3,4,5
4 Statement of changes in beneficial ownership of securities
3,4,5
4 Statement of changes in beneficial ownership of securities
3,4,5
4 Statement of changes in beneficial ownership of securities
3,4,5
3 Initial filing by director officer or owner of more than ten percent
3,4,5
4 Statement of changes in beneficial ownership of securities
3,4,5
SCHEDULE 13D SCHEDULE 13D - Description
Other
4 Statement of changes in beneficial ownership of securities
3,4,5