MADISON GAS & ELECTRIC CO

For the period ended Jun 19, 2026. Filed Jun 23, 2026.

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Jun 19, 2026 · Filed Jun 23, 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
June 19, 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.
000-49965	MGE Energy, Inc.(a Wisconsin Corporation)133 South Blair StreetMadison, Wisconsin 53788(608) 252-7000 \| mgeenergy.com	39-2040501
000-1125	Madison Gas and Electric Company(a Wisconsin Corporation)133 South Blair StreetMadison, Wisconsin 53788(608) 252-7000 \| mge.com	39-0444025

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 class	Trading symbol(s)	Name of each exchange on which registered
Common Stock, $1 Par Value Per Share	MGEE	The 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).

MGE Energy, Inc. ☐ Madison Gas and Electric Company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

MGE Energy, Inc. ☐Madison Gas and Electric Company ☐

On June 19, 2026, James J. Lorenz, Vice President – Energy Operations of Madison Gas and Electric Company (the “Company”), notified the Company of his intention to retire effective December 31, 2026. Mr. Lorenz will continue to serve in his current role until his retirement date. Effective January 1, 2027, John T. Robson, currently Assistant Vice President – Energy Engineering and Production of the Company, will be appointed Vice President – Energy Operations, succeeding Mr. Lorenz in that role.

(d) Exhibits.

Exhibit No.	Description
104	Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrants have duly caused this report to be signed on their behalf by the undersigned hereunto duly authorized.

	MGE Energy, Inc.Madison Gas and Electric Company
	(Registrants)
Date: June 23, 2026	/s/ Jenny L. Lagerwall
	Jenny L. LagerwallAssistant Vice President - Accounting and Controller(Chief Accounting Officer)

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