Koppers Reports Achievements in Safety, Sustainability and Financial Performance

SEC Filings
Filing date Form Description Filing Group View
8-K

Report of unscheduled material events or corporate event

Current Reports
8-K

Report of unscheduled material events or corporate event

Current Reports
SC 13G

A statement of beneficial ownership of common stock by certain persons

Other
SC 13G

A statement of beneficial ownership of common stock by certain persons

Other
SC 13G

A statement of beneficial ownership of common stock by certain persons

Other
8-K

Report of unscheduled material events or corporate event

Current Reports
4

Statement of changes in beneficial ownership of securities

3,4,5
4

Statement of changes in beneficial ownership of securities

3,4,5
424B1

Form of prospectus that discloses information previously omitted from the prospectus

Registration Statements
4

Statement of changes in beneficial ownership of securities

3,4,5