KOP - Koppers Holdings Inc (KOP) Q4 2020 Earnings Call Transcript February, 24 2021 05:00 PM Koppers Holdings Inc. Image source: The Motley Fool. Koppers Holdings Inc (NYSE: KOP) Q4 2020 Earnings Call Feb 24, 2021 , 11:00 a.m. ET Operator Continue reading For further details see: Koppers Holdings Inc (KOP) Q4 2020 Earnings Call Transcript