OTTR - Otter Tail Corporation (OTTR) Q3 2021 Earnings Call Transcript November, 02 2021 05:31 PM Otter Tail Corporation Image source: The Motley Fool. Otter Tail Corporation (NASDAQ: OTTR) Q3 2021 Earnings Call Nov 2, 2021 , 11:00 a.m. ET Operator Continue reading For further details see: Otter Tail Corporation (OTTR) Q3 2021 Earnings Call Transcript