KOP - Koppers Holdings inc (KOP) Q3 2021 Earnings Call Transcript November, 04 2021 08:32 PM Koppers Holdings Inc. Image source: The Motley Fool. Koppers Holdings inc (NYSE: KOP) Q3 2021 Earnings Call Nov 4, 2021 , 11:00 a.m. ET Operator Continue reading For further details see: Koppers Holdings inc (KOP) Q3 2021 Earnings Call Transcript