Koppers Highlights Sustainability Achievements Including Notable Greenhouse Gas Reduction

SEC Filings
Filing date Form Description Filing Group View
144

Filed by "insiders" prior intended sale of restricted stock. Non-EDGAR filing

Other
144

Filed by "insiders" prior intended sale of restricted stock. Non-EDGAR filing

Other
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
8-K

Report of unscheduled material events or corporate event

Current Reports
EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
SC 13G/A

An amendment to the SC 13G filing

Other
SC 13G/A

An amendment to the SC 13G filing

Other
SC 13G/A

An amendment to the SC 13G filing

Other