X0508 4 2025-12-31 0001161728 MGE ENERGY INC MGEE 0001425077 DEWEY LONDA J 133 S BLAIR STREET PO BOX 1231 MADISON WI 53701-1231 true false false false false Common Stock 2025-12-31 4 M false 2062 A 7651 D Common Stock 2025-12-31 4 D false 516 D 7135 D Restricted Stock Units 2025-12-31 4 M false 2062 0 D common stock 2062 0 D On March 1, 2023, the reporting person was granted 1,144 restricted stock units (RSU's) that vested on December 31, 2025. On March 3, 2025, the reporting person was granted 918 RSU's that vested on December 31, 2025. The reporting person elected to receive 25% of the award in cash. Represents RSU's which are converted to common stock on a one-to-one basis when vested. /s/ Londa J. Dewey 2026-01-05