Koppers Has Released Our 2024 Corporate Sustainability Report!

SEC Filings
Filing date Form Description Filing Group View
4/A Amendment to a previously filed 4
3,4,5
8-K Report of unscheduled material events or corporate event
Current Reports
EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
10-K Annual report which provides a comprehensive overview of the company for the past year
Annual Filings
EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
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
SCHEDULE 13G/A SCHEDULE 13G/A - Description
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