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

Statement of changes in beneficial ownership of securities

3,4,5
4

Statement of changes in beneficial ownership of securities

3,4,5
8-K

Report of unscheduled material events or corporate event

Current Reports
SC 13G/A

An amendment to the SC 13G filing

Other
5

Annual filing director officer or owner of more than ten percent.

3,4,5
SC 13G/A

An amendment to the SC 13G filing

Other