Koppers Has Published Our 2025 Sustainability Report Highlighting Record Safety and Emissions Performance and Refreshed 2030 Strategy

SEC Filings
Filing date Form Description Filing Group View
144 Filed by "insiders" prior intended sale of restricted stock.
Other
144 Filed by "insiders" prior intended sale of restricted stock.
Other
8-K Report of unscheduled material events or corporate event
Current Reports
EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
10-Q Quarterly report which provides a continuing view of a company's financial position
Quarterly Filings
EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
SCHEDULE 13G/A SCHEDULE 13G/A - Description
Other
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