Koppers Reports Achievements in Safety, Sustainability and Financial Performance

SEC Filings
Filing date Form Description Filing Group View
UPLOAD

UPLOAD

Other
DEF 14A

Official notification to shareholders of matters to be brought to a vote ("Proxy")

Proxy Filings
EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
ARS

An annual report to security holders

Annual Filings
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
EX-101.LAB - XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
3

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

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
EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
4

Statement of changes in beneficial ownership of securities

3,4,5