Koppers Highlights Sustainability Achievements Including Notable Greenhouse Gas Reduction

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/A

Amendment to a previously filed 4

3,4,5
4

Statement of changes in beneficial ownership of securities

3,4,5
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
4/A

Amendment to a previously filed 4

3,4,5
PRE 14A

A preliminary proxy statement providing notification matters to be brought to a vote

Proxy Filings