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
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
4

Statement of changes in beneficial ownership of securities

3,4,5
10-Q

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

Quarterly Filings
SC 13G

A statement of beneficial ownership of common stock by certain persons

Other
ARS

An annual report to security holders

Annual Filings
DEF 14A

Official notification to shareholders of matters to be brought to a vote ("Proxy")

Proxy Filings