OTTR - Otter Tail Corporation (OTTR) Q2 2021 Earnings Call Transcript August, 03 2021 07:01 PM Otter Tail Corporation Image source: The Motley Fool. Otter Tail Corporation (NASDAQ: OTTR) Q2 2021 Earnings Call Aug 3, 2021 , 11:00 a.m. ET Operator Continue reading For further details see: Otter Tail Corporation (OTTR) Q2 2021 Earnings Call Transcript