Investor Relations

Customers come back to Koppers because they know they can depend on us for quality, timeliness and attention to detail.

SEC Filings

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

An amendment to the SC 13G filing

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
10-Q

Quarterly report which provides a continuing view of a company's financial position

Quarterly Filings
EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
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
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