OTTR - Otter Tail (OTTR) Q4 2021 Earnings Call Transcript February, 15 2022 09:30 PM Otter Tail Corporation Image source: The Motley Fool. Otter Tail (NASDAQ: OTTR) Q4 2021 Earnings Call Feb 15, 2022 , 10:00 a.m. ET Operator Continue reading For further details see: Otter Tail (OTTR) Q4 2021 Earnings Call Transcript