X0508 4 2025-12-31 0001161728 MGE ENERGY INC MGEE 0001732234 Berbee James G 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 8989.2321 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. Includes adjustments for accrued dividends pursuant to dividend reinvestment and exempt from Sec 16 under Rule 16a-11 Represents RSU's which are converted to common stock on a one-to-one basis when vested. /s/ James G. Berbee 2026-01-05