Koppers Highlights Sustainability Achievements Including Notable Greenhouse Gas Reduction

SEC Filings
Filing date Form Description Filing Group View
SC 13G/A

An amendment to the SC 13G filing

Other
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
144

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

Other
4

Statement of changes in beneficial ownership of securities

3,4,5
144

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

Other
4

Statement of changes in beneficial ownership of securities

3,4,5
144

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

Other