Otter Tail Corp Director Nathan Partain Receives Restricted Stock Award

This SEC Form 4 filing reports that Nathan I. Partain, a director of Otter Tail Corp (OTTR), received a restricted stock award on April 13, 2026. Partain acquired 2,000 shares of common stock under the company's 2023 Stock Incentive Plan, with the shares having a fair market value of $91.15 per share. The restricted stock award will vest in near-equal installments of one-third per year beginning April 8, 2027. Following this transaction, Partain directly owns 10,969 shares of Otter Tail common stock. Additionally, the filing discloses indirect holdings of 1,600 shares held in an IRA and 67,561 shares held in a trust. The filing was signed by James A. Versteeg as attorney-in-fact for Nathan Partain on April 14, 2026.