CCO - Clear Channel Outdoor Holdings Inc (CCO) Q1 2021 Earnings Call Transcript May, 10 2021 06:00 PM Clear Channel Outdoor Holdings Inc. Class A Image source: The Motley Fool. Clear Channel Outdoor Holdings Inc (NYSE: CCO) Q1 2021 Earnings Call May 10, 2021 , 8:30 a.m. ET Operator Continue reading For further details see: Clear Channel Outdoor Holdings Inc (CCO) Q1 2021 Earnings Call Transcript