X0206 3/A 2021-05-01 2021-05-10 0 0001161728 MGE ENERGY INC MGEE 0001859913 Lorenz James Jerome 623 RAILROAD STREET PO BOX 1231 MADISON WI 53701-1231 0 1 0 0 VP Energy Operations MGEE Common Stock 1238.5162 D (1) Includes restricted stock units (RSUs) of 493 which were granted prior to becoming a Section 16 reporting officer. The RSU are converted to common stock on a one-to-one basis when vested. The RSUs vest on December 31, 2023. /s/ James J. Lorenz 2021-05-01