<SEC-DOCUMENT>0001161728-23-000023-index.html : 20230329 <SEC-HEADER>0001161728-23-000023.hdr.sgml : 20230329 <ACCEPTANCE-DATETIME>20230329091322 ACCESSION NUMBER: 0001161728-23-000023 CONFORMED SUBMISSION TYPE: DEFA14A PUBLIC DOCUMENT COUNT: 3 FILED AS OF DATE: 20230329 DATE AS OF CHANGE: 20230329 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MGE ENERGY INC CENTRAL INDEX KEY: 0001161728 STANDARD INDUSTRIAL CLASSIFICATION: ELECTRIC, GAS & SANITARY SERVICES [4900] IRS NUMBER: 392040501 STATE OF INCORPORATION: WI FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: DEFA14A SEC ACT: 1934 Act SEC FILE NUMBER: 000-49965 FILM NUMBER: 23772058 BUSINESS ADDRESS: STREET 1: 133 SOUTH BLAIR STREET STREET 2: P.O. BOX 1231 CITY: MADISON STATE: WI ZIP: 53701-1231 BUSINESS PHONE: (608) 252-7000 MAIL ADDRESS: STREET 1: 133 SOUTH BLAIR STREET STREET 2: P.O. BOX 1231 CITY: MADISON STATE: WI ZIP: 53701-1231 </SEC-HEADER> <DOCUMENT> <TYPE>DEFA14A <SEQUENCE>1 <FILENAME>f20230329_defa_14a_notice.htm <DESCRIPTION>ADDITIONAL PROXY MATERIAL <TEXT> Document 1 - file: f20230329_defa_14a_notice.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>2 <FILENAME>f20230329defa14anotice1.jpg <TEXT> Document 2 - file: f20230329defa14anotice1.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>3 <FILENAME>f20230329defa14anotice2.jpg <TEXT> Document 3 - file: f20230329defa14anotice2.jpg
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