Koppers Has Released Our 2024 Corporate Sustainability 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
8-K/A Amendment to a previously filed 8-K
Current Reports
EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
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
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
8-K Report of unscheduled material events or corporate event
Current Reports
EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA