<SEC-DOCUMENT>0001193125-26-208987-index.html : 20260506 <SEC-HEADER>0001193125-26-208987.hdr.sgml : 20260506 <ACCEPTANCE-DATETIME>20260506161337 ACCESSION NUMBER: 0001193125-26-208987 CONFORMED SUBMISSION TYPE: 424B5 PUBLIC DOCUMENT COUNT: 4 FILED AS OF DATE: 20260506 DATE AS OF CHANGE: 20260506 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MGE ENERGY INC CENTRAL INDEX KEY: 0001161728 STANDARD INDUSTRIAL CLASSIFICATION: ELECTRIC, GAS & SANITARY SERVICES [4900] ORGANIZATION NAME: 01 Energy & Transportation EIN: 392040501 STATE OF INCORPORATION: WI FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 424B5 SEC ACT: 1933 Act SEC FILE NUMBER: 333-293693 FILM NUMBER: 26948562 BUSINESS ADDRESS: STREET 1: 133 SOUTH BLAIR STREET STREET 2: PO BOX 1231 CITY: MADISON STATE: WI ZIP: 53701-1231 BUSINESS PHONE: (608) 252-7000 MAIL ADDRESS: STREET 1: 133 SOUTH BLAIR STREET STREET 2: PO BOX 1231 CITY: MADISON STATE: WI ZIP: 53701-1231 </SEC-HEADER> <DOCUMENT> <TYPE>424B5 <SEQUENCE>1 <FILENAME>copy_of_05-06-2026_prosp.htm <DESCRIPTION>424B5 <TEXT> Document 1 - file: copy_of_05-06-2026_prosp.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>2 <FILENAME>img238466634_0.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 2 - file: img238466634_0.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>3 <FILENAME>img238466634_1.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 3 - file: img238466634_1.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>4 <FILENAME>img238466634_2.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 4 - file: img238466634_2.jpg
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