Koppers to sell China chemicals plant; expects 4Q earnings below forecast | Pittsburgh Post-Gazette
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Investor Relations | Koppers Holdings, Inc.
New Koppers CEO overseeing a major company transition | Pittsburgh Post-Gazette
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Personalities of Pittsburgh: Jimmi Sue Smith and the 'next evolution' of Koppers Holdings Inc. - Pittsburgh Business Times
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Is Koppers Holdings Inc.'s (NYSE:KOP) ROE Of 40% Impressive?
Koppers Holdings Publishes Digital 2021 Annual Report | citybiz
Koppers Holdings Inc (KOP) Stock 10 Year History
Glancy Prongay & Murray LLP, a Leading Securities Fraud Law Firm, Announces Investigation of Koppers Holdings Inc. (KOP) on Behalf of Investors | Business Wire
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koppers-railroad-crosstie-acquisition - Pittsburgh Business Times
Koppers Completes Purchase of Property in Louisiana | citybiz