Form 4 Filing for Otter Tail Corp (OTTR) - Director Stock Acquisition

Steven P. Rasche, a director at Otter Tail Corp (OTTR), acquired 1900 shares of Common Stock on April 13, 2026, under the 2023 Stock Incentive Plan. This was a grant of Restricted Stock with a fair market value of $91.15 per share. The shares vest in three equal annual installments starting April 8, 2027. Following this transaction, Rasche directly holds 2000 shares of Common Stock. The filing was made on April 14, 2026.