Koppers Reports Achievements in Safety, Sustainability and Financial Performance

SEC Filings
Filing date Form Description Filing Group View
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
5

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

3,4,5
5

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

3,4,5
5

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

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
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