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))

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 ☐

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

1

Item 8.01. Other Events.

On November 3, 2021, Madison Gas and Electric Company (MGE) today announced plans to end the use of coal as a primary fuel at Elm Road Generating Station (Elm Road) located in Oak Creek, Wisconsin. MGE is a minority owner of Elm Road, owning 8.33%. The approximately 1,230‐megawatt (MW) coal-fired plant is owned by WEC Energy Group, whose subsidiary serves as operator, and by WPPI Energy, Inc. This transition is expected to reduce the use of coal at Elm Road substantially by 2030 and to eliminate coal as an energy source at Elm Road by 2035.

MGE issued a press release on November 3, 2021, announcing the plan regarding Elm Road. A copy of the press release is attached hereto as Exhibit 99.1.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. Such statements include the risks and uncertainties related to the COVID-19 pandemic. Such forward-looking statements are based on MGE Energy’s current expectations, estimates and assumptions regarding future events, which are inherently uncertain. We caution you not to place undue reliance on any forward-looking statements, which are made as of the date of this press release. We undertake no obligation to revise or update publicly any such forward-looking statements to reflect any change in expectations or in events, conditions or circumstances on which any such statements may be based. For a further description of the risks and uncertainties that could cause actual results to differ from those expressed in these forward-looking statements, as well as risks relating to our business in general, please refer to the “Risk Factors” sections in our Annual Report on Form 10-K for the year ended December 31, 2020, filed with the Securities and Exchange Commission.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

2

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.

3