Koppers Reports Achievements in Safety, Sustainability and Financial Performance

SEC Filings
Filing date Form Description Filing Group View
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
10-Q

Quarterly report which provides a continuing view of a company's financial position

Quarterly Filings
EX-101.INS - XBRL INSTANCE DOCUMENT
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
4

Statement of changes in beneficial ownership of securities

3,4,5
424B3

Form of prospectus reflecting facts events constituting substantive change from last form

Registration Statements
4

Statement of changes in beneficial ownership of securities

3,4,5
4

Statement of changes in beneficial ownership of securities

3,4,5