Form 4 Filing for Otter Tail Corp

Thomas J. Webb, a director at Otter Tail Corp, acquired 1500 shares of Common Stock on April 13, 2026, under the 2023 Stock Incentive Plan. This grant of Restricted Stock will vest in three equal annual installments starting April 8, 2027. The fair market value of this grant was $91.15 per share. Following this transaction, Mr. Webb directly holds 17,600 shares of Common Stock. The filing was signed on April 14, 2026, by his attorney-in-fact.