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MADISON GAS & ELECTRIC CO

For the period ended Oct 1, 2026. Filed Oct 5, 2026.

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A notice of a major event between regular reports, such as results, a deal or a change of executives. It is often the first formal record of the news.

Oct 1, 2026 · Filed Oct 5, 2026

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MGEE$80.26+2.4%Stored close · as of Nov 6, 2026
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UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549
October 1, 2026Date of report (date of earliest event reported)
CommissionFile No.Name of Registrant, State of Incorporation, Addressof Principal Executive Offices, and Telephone No.IRS EmployerIdentification No.
000-49965MGE Energy, Inc.(a Wisconsin Corporation)133 South Blair StreetMadison, Wisconsin 53788(608) 252-7000 | mgeenergy.com39-2040501
000-1125Madison Gas and Electric Company(a Wisconsin Corporation)133 South Blair StreetMadison, Wisconsin 53788(608) 252-7000 | mge.com39-0444025

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered
Common Stock, $1 Par Value Per ShareMGEEThe NASDAQ Stock Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.