X0306 4 2022-04-11 0001466593 Otter Tail Corp OTTR 0001205398 STAKE JAMES B 215 S CASCADE ST FERGUS FALLS MN 56537-2801 1 Common Stock 2022-04-11 4 A 0 1900 A 46794 D Shares of Common Stock acquired under the 2014 Stock Incentive Plan, which is a grant of Restricted Stock. The shares granted on 4/11/2022 will vest in near-equal installments of one-third per year beginning April 8, 2023. The grant has a fair market value of $63.135. Total direct holdings include shares acquired individually in the Dividend Reinvestment Plan and acquired pursuant to Restricted Stock Award distributions. /s/ James B Stake by Ella Leapaldt, Attorney-in-Fact 2022-04-12