Koppers Reports Achievements in Safety, Sustainability and Financial Performance

SEC Filings
Filing date Form Description Filing Group View
3/A

An amendment to a 3 filing. Non-EDGAR filing

3,4,5
3/A

An amendment to a 3 filing. Non-EDGAR filing

3,4,5
3

Initial filing by director officer or owner of more than ten percent.

3,4,5
3

Initial filing by director officer or owner of more than ten percent.

3,4,5
3

Initial filing by director officer or owner of more than ten percent.

3,4,5
3

Initial filing by director officer or owner of more than ten percent.

3,4,5
3

Initial filing by director officer or owner of more than ten percent.

3,4,5
3

Initial filing by director officer or owner of more than ten percent.

3,4,5
3

Initial filing by director officer or owner of more than ten percent.

3,4,5
3

Initial filing by director officer or owner of more than ten percent.

3,4,5