OTTR - Otter Tail Corp (OTTR) Q4 2020 Earnings Call Transcript February, 16 2021 09:30 PM Otter Tail Corporation Image source: The Motley Fool. Otter Tail Corp (NASDAQ: OTTR) Q4 2020 Earnings Call Feb 16, 2021 , 11:00 a.m. ET Operator Continue reading For further details see: Otter Tail Corp (OTTR) Q4 2020 Earnings Call Transcript