MGEE / MGE Energy, Inc. - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

MGE Energy, Inc.
US ˙ NasdaqGS ˙ US55277P1049

Mga Batayang Estadistika
LEI 549300BYWGHSXX2TEO67
CIK 1161728
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to MGE Energy, Inc.
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
August 15, 2025 EX-99.1

1

EXHIBIT 99.1 News MGE Energy Increases Dividend for 50th Consecutive Year Madison, Wis., August 15, 2025—The board of directors of MGE Energy, Inc. (Nasdaq: MGEE), today increased the regular quarterly dividend rate 5.6% to $0.4750 per share on the outstanding shares of the company’s common stock. The dividend is payable Sept. 15, 2025, to shareholders of record Sept. 1, 2025. This raises the annu

August 15, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 15, 2025 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

August 6, 2025 EX-99.2

EX-99.2

August 6, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 6, 2025 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE E

August 6, 2025 EX-99.1

MGE Energy, Inc. (In thousands, except per-share amounts)

EXHIBIT 99.1 News MGE Energy Reports Second-Quarter 2025 Earnings Madison, Wis., August 06, 2025—MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the second quarter of 2025. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the second quarter of 2025 were $26.5 million, or $0.73 per share, compared to $23.8 million, or $0.66 per share, for the same peri

August 6, 2025 10-Q

Filing Format Forward-Looking Statements Where to Find More Information

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: June 30, 2025 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorpor

May 22, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 20, 2025 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ene

May 16, 2025 EX-99.1

EX-99.1

May 16, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 16, 2025 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ene

May 7, 2025 10-Q

Filing Format Forward-Looking Statements Where to Find More Information

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: March 31, 2025 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorpo

May 7, 2025 EX-99.1

MGE Energy, Inc. (In thousands, except per-share amounts)

EXHIBIT 99.1 News MGE Energy Reports First-Quarter 2025 Earnings Madison, Wis., May 07, 2025—MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the first quarter of 2025. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the first quarter of 2025 were $41.6 million, or $1.14 per share, compared to $33.8 million, or $0.93 per share, for the same period in

May 7, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 7, 2025 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ener

April 21, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by registrant: ☒ Filed by a Party other than the Registrant: ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Stateme

April 8, 2025 DEFR14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Amendment No. 1 Filed by registrant: ☒ Filed by a Party other than the Registrant: ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definiti

April 4, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by registrant: ☒ Filed by a Party other than the Registrant: ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Stateme

April 4, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by registrant: ☒ Filed by a Party other than the Registrant: ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Stateme

April 4, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by registrant: ☒ Filed by a Party other than the Registrant: ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Stateme

April 4, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by registrant: ☒ Filed by a Party other than the Registrant: ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy Stateme

February 26, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 21, 2025 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

February 25, 2025 EX-99.1

EX-99.1

February 25, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 25, 2025 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

February 25, 2025 EX-99.1

MGE Energy, Inc. (In thousands, except per-share amounts)

EXHIBIT 99.1 News MGE Energy Reports Fourth-Quarter and Full-Year 2024 Earnings Madison, Wis., Feb. 25, 2025—MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the fourth quarter and full year of 2024. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the full year of 2024 were $120.6 million, or $3.33 per share, compared to $117.7 million, or $3.25 per s

February 25, 2025 10-K

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended: December 31, 2024 ☐ Transition report pursuant to Sect

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended: December 31, 2024 ☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorporatio

February 25, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 25, 2025 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

February 25, 2025 EX-19.1

MGE ENERGY, INC. INSIDER STOCK TRADING POLICY

EXHIBIT 19.1 MGE ENERGY, INC. INSIDER STOCK TRADING POLICY This Policy is intended to elaborate on, and to explain several important considerations underlying, the provisions of our Code of Ethics restricting the purchase or sale of Company securities based on confidential or insider information. “We,” “our” and “Company” refer to MGE Energy, Inc. and its subsidiaries. Our common stock is publicly

February 25, 2025 EX-97.1

MGE ENERGY, INC. POLICY ON RECOUPMENT OF INCENTIVE COMPENSATION

EXHIBIT 97.1 MGE ENERGY, INC. POLICY ON RECOUPMENT OF INCENTIVE COMPENSATION Introduction The Board of Directors (the “Board”) of MGE Energy, Inc. (the “Company”) has adopted this Policy on Recoupment of Incentive Compensation (this “Policy”), which provides for the recoupment of compensation in certain circumstances in the event of a restatement of financial results by the Company. This Policy sh

February 25, 2025 EX-21

Subsidiaries of MGE Energy, Inc.

EXHIBIT 21 Subsidiaries of MGE Energy, Inc. As of December 31, 2024, the company held the following subsidiaries (all of which are formed or organized as Wisconsin entities): • Madison Gas and Electric Company – a regulated utility that generates and distributes electricity to approximately 167,000 customers in Dane County, Wisconsin, and purchases and distributes natural gas to approximately 178,

December 4, 2024 EX-99.1

Wisconsin energy companies announce plan to continue operations at Columbia Energy Center, commit to exploring conversion to natural gas

Wisconsin energy companies announce plan to continue operations at Columbia Energy Center, commit to exploring conversion to natural gas This necessary next step furthers reliability, supports customer growth and maintains affordability while continuing to advance co-owners’ sustainability goals.

December 4, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 December 4, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

November 8, 2024 EX-99.1

EX-99.1

November 8, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 8, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

November 6, 2024 EX-99.1

MGE Energy, Inc. (In thousands, except per-share amounts)

EXHIBIT 99.1 News MGE Energy Reports Third-Quarter 2024 Earnings Madison, Wis., Nov. 6, 2024—MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the third quarter of 2024. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the third quarter of 2024 were $40.9 million, or $1.13 per share, compared to $37.9 million, or $1.05 per share, for the same period in

November 6, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 6, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

November 6, 2024 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: September 30, 2024 ☐ Transition Report Pursuan

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: September 30, 2024 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Inc

November 6, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 6, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

November 6, 2024 EX-99.1

EX-99.1

November 5, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 October 31, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

November 5, 2024 EX-4.1

Madison Gas and Electric Company $25,000,000 5.30% Senior Notes, Series A, due December 1, 2039 $25,000,000 5.59% Senior Notes, Series B, due December 1, 2054 Note Purchase Agreement Dated October 31, 2024 Table of Contents

Execution Version Madison Gas and Electric Company $25,000,000 5.30% Senior Notes, Series A, due December 1, 2039 $25,000,000 5.59% Senior Notes, Series B, due December 1, 2054 Note Purchase Agreement Dated October 31, 2024 Table of Contents Section Heading Page Section 1. Authorization of Notes 1 Section 2. Sale and Purchase of Notes 1 Section 3. Closing 2 Section 4. Conditions to Closing 2 Secti

August 16, 2024 EX-99.1

1

EXHIBIT 99.1 News MGE Energy Increases Dividend for 49th Consecutive Year Madison, Wis., August 16, 2024—The board of directors of MGE Energy, Inc. (Nasdaq: MGEE), today increased the regular quarterly dividend rate 5.3% to $0.45 per share on the outstanding shares of the company's common stock. The dividend is payable Sept. 15, 2024, to shareholders of record Sept. 1, 2024. This raises the annual

August 16, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 16, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

August 7, 2024 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: June 30, 2024 ☐ Transition Report Pursuant to

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: June 30, 2024 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorpor

August 7, 2024 EX-99.1

EX-99.1

August 7, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 7, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE E

August 7, 2024 EX-10.1

DISABILITY INCOME INSURANCE POLICY

Platinum Advantage Insurance Policy NAME 1 Standard Insurance Company INSURED: NAME POLICY NUMBER: DISABILITY INCOME INSURANCE POLICY This is a non-participating Disability Income Insurance Policy.

August 7, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 7, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE E

August 7, 2024 EX-99.1

MGE Energy, Inc. (In thousands, except per-share amounts)

EXHIBIT 99.1 News MGE Energy Reports Second-Quarter 2024 Earnings Madison, Wis., August 07, 2024—MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the second quarter of 2024. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the second quarter of 2024 were $23.8 million, or $0.66 per share, compared to $28.7 million, or $0.79 per share, for the same peri

May 23, 2024 8-K

Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 21, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ene

May 9, 2024 EX-99.1

EX-99.1

May 9, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 9, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ener

May 8, 2024 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: March 31, 2024 ☐ Transition Report Pursuant to

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: March 31, 2024 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorpo

May 8, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 8, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ener

May 8, 2024 EX-99.1

MGE Energy, Inc. (In thousands, except per-share amounts)

EXHIBIT 99.1 News MGE Energy Reports First-Quarter 2024 Earnings Madison, Wis., May 08, 2024—MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the first quarter of 2024. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the first quarter of 2024 were $33.8 million, or $0.93 per share, compared to $31.1 million, or $0.86 per share, for the same period in

April 24, 2024 DEFA14A

Additional information mailed to MGE Energy shareholders on or about April 24, 2024.

Additional information mailed to MGE Energy shareholders on or about April 24, 2024.

April 5, 2024 DEFA14A

Additional information mailed to MGE Energy shareholders on or about April 5, 2024.

Additional information mailed to MGE Energy shareholders on or about April 5, 2024.

April 5, 2024 DEFA14A

Additional information mailed to MGE Energy shareholders on or about April 5, 2024.

Additional information mailed to MGE Energy shareholders on or about April 5, 2024.

April 5, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by registrant: ☒ Filed by a Party other than the Registrant: ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy Stateme

April 5, 2024 DEFA14A

Our world is increasingly connected… with energy powering those connections.

The following is a transcription of Chairman, President and CEO Jeffrey Keebler's video message prepared by MGE Energy, Inc.

March 21, 2024 SC 13G

MGEE / MGE Energy, Inc. / MILLENNIUM MANAGEMENT LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 MGE ENERGY, INC. (Name of Issuer) COMMON STOCK, PAR VALUE $1.00 PER SHARE (Title of Class of Securities) 55277P104 (CUSIP Number) MARCH 14, 2024 (Date of event which requires filing of this statement) Check the appropriate box to designate the rule pursuant to which this S

February 21, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 21, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

February 21, 2024 EX-97.1

Policy on Recoupment of Incentive Compensation

EXHIBIT 97.1 MGE ENERGY, INC. POLICY ON RECOUPMENT OF INCENTIVE COMPENSATION Introduction The Board of Directors (the “Board”) of MGE Energy, Inc. (the “Company”) has adopted this Policy on Recoupment of Incentive Compensation (this “Policy”), which provides for the recoupment of compensation in certain circumstances in the event of a restatement of financial results by the Company. This Policy sh

February 21, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 16, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

February 21, 2024 10-K

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended: December 31, 2023 ☐ Transition report pursuant to Sect

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended: December 31, 2023 ☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorporatio

February 21, 2024 EX-21

Subsidiaries of MGE Energy, Inc.

EXHIBIT 21 Subsidiaries of MGE Energy, Inc. As of December 31, 2023, the company held the following subsidiaries (all of which are formed or organized as Wisconsin entities): • Madison Gas and Electric Company – a regulated utility that generates and distributes electricity to approximately 163,000 customers in Dane County, Wisconsin, and purchases and distributes natural gas to approximately 176,

February 21, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 21, 2024 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

February 21, 2024 EX-99.1

EX-99.1

February 21, 2024 EX-19.1

Insider Trading Policies and Procedures

EXHIBIT 19.1 MGE ENERGY, INC. INSIDER STOCK TRADING POLICY This Policy is intended to elaborate on, and to explain several important considerations underlying, the provisions of our Code of Ethics restricting the purchase or sale of Company securities based on confidential or insider information. “We,” “our” and “Company” refer to MGE Energy, Inc. and its subsidiaries. Our common stock is publicly

February 21, 2024 EX-99.1

MGE Energy, Inc. (In thousands, except per-share amounts)

EXHIBIT 99.1 News MGE Energy Reports Fourth-Quarter and Full-Year 2023 Earnings Madison, Wis., Feb. 21, 2024—MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the fourth quarter and full year of 2023. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the full year of 2023 were $117.7 million, or $3.25 per share, compared to $111.0 million, or $3.07 per s

February 13, 2024 SC 13G/A

MGEE / MGE Energy, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0092-mgeenergyinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 14)* Name of issuer: MGE Energy Inc Title of Class of Securities: Common Stock CUSIP Number: 55277P104 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the ru

December 19, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 December 15, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

November 8, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 08, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

November 8, 2023 EX-99.1

EX-99.1

November 2, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 2, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

November 2, 2023 EX-99.1

1 MGE Energy, Inc. (In thousands, except per-share amounts)

EXHIBIT 99.1 News MGE Energy Reports Third-Quarter 2023 Earnings Madison, Wis., Nov. 02, 2023—MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the third quarter of 2023. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the third quarter of 2023 were $37.9 million, or $1.05 per share, compared to $33.7 million, or $0.93 per share, for the same period in

November 2, 2023 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: September 30, 2023 ☐ Transition Report Pursuan

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: September 30, 2023 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Inc

November 2, 2023 EX-99.1

EX-99.1

November 2, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 2, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

September 18, 2023 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 September 15, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 M

September 18, 2023 EX-3.1

Amended and Restated Bylaws of MGE Energy, Inc.

Exhibit 3.1 Amended and Restated Bylaws of MGE Energy, Inc. (a Wisconsin Corporation) September , 2023 Table of Contents Article I. Offices 1 1.01 Principal and Business Offices. 1 1.02 Registered Office. 1 Article II. Shareholders 1 2.01 Annual Meeting. 1 2.02 Special Meeting. 1 2.03 Place of Meeting. 5 2.04 Notice of Meeting. 5 2.05 Closing of Stock Transfer Records or Fixing of Record Date. 6 2

September 6, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 31, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

September 6, 2023 EX-4.1

$40,000,000 5.61% Senior Notes, Series A, due September 15, 2034 $30,000,000 5.91% Senior Notes, Series B, due December 1, 2053 Note Purchase Agreement Dated August 31, 2023 Table of Contents

Execution Version Exhibit 4.1 Madison Gas and Electric Company $40,000,000 5.61% Senior Notes, Series A, due September 15, 2034 $30,000,000 5.91% Senior Notes, Series B, due December 1, 2053 Note Purchase Agreement Dated August 31, 2023 Table of Contents Section Heading Page Section 1. Authorization of Notes 1 Section 2. Sale and Purchase of Notes 1 Section 3. Closing 2 Section 4. Conditions to Cl

August 18, 2023 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 18, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

August 18, 2023 EX-99.1

1

EXHIBIT 99.1 News MGE Energy Increases Dividend for 48th Consecutive Year Madison, Wis., August 18, 2023—The board of directors of MGE Energy, Inc. (Nasdaq: MGEE), today increased the regular quarterly dividend rate approximately 5% to $0.4275 per share on the outstanding shares of the company's common stock. The dividend is payable Sept. 15, 2023, to shareholders of record Sept. 1, 2023. This rai

August 4, 2023 EX-99.1

EX-99.1

August 4, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 4, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE E

August 3, 2023 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: June 30, 2023 ☐ Transition Report Pursuant to

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: June 30, 2023 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorpor

August 3, 2023 EX-99.1

MGE Energy, Inc. (In thousands, except per-share amounts)

EXHIBIT 99.1 News MGE Energy Reports Second-Quarter 2023 Earnings Madison, Wis., Aug. 03, 2023—MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the second quarter of 2023. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the second quarter of 2023 were $28.7 million, or $0.79 per share, compared to $21.8 million, or $0.60 per share, for the same period

August 3, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 3, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE E

May 18, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 16, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ene

May 8, 2023 EX-25

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION D

EXHIBIT 25.1 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) || THE BANK OF NE

May 8, 2023 S-3ASR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 Registration Statement Under the Securities Act of 1933

Form S-3 (ASR) Registration No. 333- Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 Registration Statement Under the Securities Act of 1933 MGE Energy, Inc. (Exact name of registrant as specified in its charter) Madison Gas and Electric Company (Exact name of registrant as specified in its charter) Wisconsin (State or other jurisdiction of in

May 8, 2023 EX-FILING FEES

Calculation of Filing Fee Tables Form S-3 (Form Type) MGE Energy, Inc. (Exact Name of Registrant as Specified in its Charter) Not Applicable (Translation of Registrant’s Name into English) Table 1: Newly Registered and Carry Forward Securities

EX-FILING FEES 13 ex107.htm EXHIBIT 107 EX-FILING FEES EXHIBIT 107 Calculation of Filing Fee Tables Form S-3 (Form Type) MGE Energy, Inc. (Exact Name of Registrant as Specified in its Charter) Not Applicable (Translation of Registrant’s Name into English) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registere

May 5, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 5, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ener

May 5, 2023 EX-99

EX-99

May 4, 2023 EX-99

MGE Energy, Inc. (In thousands, except per-share amounts)

EXHIBIT 99.1 News MGE Energy Reports First-Quarter 2023 Earnings Madison, Wis., May 04, 2023—MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the first quarter of 2023. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the first quarter of 2023 were $31.1 million, or $0.86 per share, compared to $34.4 million, or $0.95 per share, for the same period in

May 4, 2023 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: March 31, 2023 ☐ Transition Report Pursuant to

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: March 31, 2023 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorpo

May 4, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 4, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ener

April 21, 2023 DEFA14A

Reminder to vote information mailed to MGE Energy shareholders on or about April 24, 2023.

Reminder to vote information mailed to MGE Energy shareholders on or about April 24, 2023.

March 29, 2023 DEFA14A

1

The following is a transcription of Chairman, President and CEO Jeffrey Keebler's video message prepared by MGE Energy, Inc.

March 29, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by registrant: ☒ Filed by a Party other than the Registrant: ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy Stateme

March 29, 2023 DEFA14A

Additional information mailed to MGE Energy shareholders on or about March 29, 2023.

Additional information mailed to MGE Energy shareholders on or about March 29, 2023.

March 29, 2023 DEFA14A

Additional information mailed to MGE Energy shareholders on or about March 29, 2023.

Additional information mailed to MGE Energy shareholders on or about March 29, 2023.

March 8, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 March 6, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE En

February 23, 2023 EX-99

EX-99

February 23, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 17, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

February 22, 2023 EX-10

Second Amended and Restated Credit Agreement dated as of November 8, 2022, among Madison Gas and Electric Company, the Lenders party thereto and JPMorgan Chase Bank, N.A., as Administrative Agent.

EXHIBIT 10.2 SECOND AMENDED AND RESTATED CREDIT AGREEMENT DATED AS OF NOVEMBER 8, 2022 AMONG MADISON GAS AND ELECTRIC COMPANY, AS BORROWER, THE LENDERS, JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT, AND BANK OF AMERICA, N.A. AND U.S. BANK NATIONAL ASSOCIATION, AS SYNDICATION AGENTS, JPMORGAN CHASE BANK, N.A., AS LEAD ARRANGER AND SOLE BOOK RUNNER Table of Contents Page ARTICLE I DEFINITIONS;

February 22, 2023 EX-10

2023 Deferred Compensation Supplemental Executive Retirement Plan

EXHIBIT 10.32 MADISON GAS AND ELECTRIC COMPANY 2023 DEFERRED COMPENSATION SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN Effective as of January 1, 2023 1 TABLE OF CONTENTS Page Article 1 PURPOSE; EFFECTIVE DATE 6 1.1 Purpose 6 1.2 Effective Date 6 1.3 Plan Type 6 Article 2 DEFINITIONS 7 2.1 Account(s) 7 2.2 Administrator 7 2.3 Beneficiary 7 2.4 Board 7 2.5 Change in Control 7 2.6 Code 9 2.7 Company 9 2.8

February 22, 2023 EX-10

Second Amended and Restated Credit Agreement dated as of November 8, 2022, among MGE Energy, Inc., the Lenders party thereto and JPMorgan Chase Bank, N.A., as Administrative Agent.

EXHIBIT 10.1 SECOND AMENDED AND RESTATED CREDIT AGREEMENT DATED AS OF NOVEMBER 8, 2022 AMONG MGE ENERGY, INC., AS BORROWER, THE LENDERS, JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT, AND BANK OF AMERICA, N.A. AND U.S. BANK NATIONAL ASSOCIATION, AS SYNDICATION AGENTS, JPMORGAN CHASE BANK, N.A., AS LEAD ARRANGER AND SOLE BOOK RUNNER Table of Contents Page ARTICLE I DEFINITIONS; ETC 1 1.1. Defi

February 22, 2023 EX-10

Income Continuation Agreement - Johnson

EXHIBIT 10.35 INCOME CONTINUATION AGREEMENT This Income Continuation Agreement (Agreement) is entered into as of the day of , 2016 by and between Madison Gas and Electric Company, a Wisconsin corporation (MGE), and Tamara J. Johnson (Employee), and shall be effective as of January 1, 2016. WHEREAS, MGE values the efforts, abilities, and accomplishments of the Employee, and recognizes that the Empl

February 22, 2023 EX-21

Subsidiaries of MGE Energy, Inc.

EXHIBIT 21 Subsidiaries of MGE Energy, Inc. As of December 31, 2022, the company held the following subsidiaries (all of which are formed or organized as Wisconsin entities): • Madison Gas and Electric Company – a regulated utility that generates and distributes electricity to approximately 161,000 customers in Dane County, Wisconsin, and purchases and distributes natural gas to approximately 173,

February 22, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 22, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

February 22, 2023 EX-10

Income Continuation Agreement - Hobbie

EXHIBIT 10.34 INCOME CONTINUATION AGREEMENT This Income Continuation Agreement (Agreement) is entered into as of the day of , 2016 by and between Madison Gas and Electric Company, a Wisconsin corporation (MGE), and Lynn K. Hobbie (Employee), and shall be effective as of January 1, 2016. This Agreement supersedes any and all previous Income Continuation Agreements entered into by and between the Em

February 22, 2023 EX-10

Amendment to Madison Gas and Electric Company Deferred Compensation Agreement

EXHIBIT 10.31 AMENDMENT TO MADISON GAS AND ELECTRIC COMPANY DEFERRED COMPENSATION AGREEMENT Pursuant to Section 10 of the Deferred Compensation Agreement effective December 16, 2022, between (“Employee”) and Madison Gas and Electric Company (the “Agreement”), the Agreement is hereby amended as follows, effective January 1, 2023. 1. Section 4.d shall be revised to read as follows: For each calendar

February 22, 2023 EX-10

Second Amended and Restated Credit Agreement dated as of November 8, 2022, among Madison Gas and Electric Company, the Lenders party thereto and U.S. Bank National Association, as Administrative Agent.

EXHIBIT 10.4 Execution Version DEAL CUSIP NUMBER: 557498AE2 FACILITY CUSIP NUMBER: 557498AF9 SECOND AMENDED AND RESTATED CREDIT AGREEMENT DATED AS OF NOVEMBER 8, 2022 AMONG MADISON GAS AND ELECTRIC COMPANY, AS BORROWER, THE LENDERS, U.S. BANK NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT, AND ASSOCIATED BANK, N.A., AS SYNDICATION AGENT U.S. BANK NATIONAL ASSOCIATION LEAD ARRANGER AND SOLE BOOK RUN

February 22, 2023 EX-99

1 MGE Energy, Inc. (In thousands, except per share amounts)

EXHIBIT 99.1 News MGE Energy Reports Fourth-Quarter and Full Year 2022 Earnings Madison, Wis., Feb. 22, 2023—MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the fourth quarter of 2022 and for the full year of 2022. MGE Energy's earnings for the full year of 2022 were $111.0 million, or $3.07 per share, compared to $105.8 million, or $2.92 per share, for the same period in the

February 22, 2023 10-K

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended: December 31, 2022 ☐ Transition report pursuant to Sect

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended: December 31, 2022 ☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorporatio

February 9, 2023 SC 13G/A

MGEE / MGE Energy, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0083-mgeenergyinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 13)* Name of issuer: MGE Energy Inc. Title of Class of Securities: Common Stock CUSIP Number: 55277P104 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the r

February 1, 2023 EX-10.1

FIRST AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT

FIRST AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT THIS FIRST AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT (this “Amendment”), dated as of January 30, 2023, is entered into by and among MADISON GAS AND ELECTRIC COMPANY, a Wisconsin corporation (the “Borrower”), the Lenders party hereto, and JPMORGAN CHASE BANK, N.

February 1, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 January 30, 2023 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

December 16, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 December 16, 2022 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

November 10, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 10, 2022 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

November 10, 2022 EX-99.1

EX-99.1

November 9, 2022 8-K

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 8, 2022 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

November 3, 2022 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: September 30, 2022 ☐ Transition Report Pursuan

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: September 30, 2022 ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Inc

November 3, 2022 EX-4.1

Madison Gas and Electric Company $25,000,000 5.43% Senior Notes, Series A, due December 1, 2032 $15,000,000 5.43% Senior Notes, Series B, due February 15, 2033 $35,000,000 5.53% Senior Notes, Series C, due February 15, 2035 Note Purchase Agreement Da

EXHIBIT 4.1 Madison Gas and Electric Company $25,000,000 5.43% Senior Notes, Series A, due December 1, 2032 $15,000,000 5.43% Senior Notes, Series B, due February 15, 2033 $35,000,000 5.53% Senior Notes, Series C, due February 15, 2035 Note Purchase Agreement Dated November 1, 2022 Table of Contents Section Heading Page Section 1. Authorization of Notes 1 Section 2. Sale and Purchase of Notes 1 Se

November 3, 2022 EX-99.1

1 MGE Energy, Inc. (In thousands, except per share amounts)

EXHIBIT 99.1 News MGE Energy Reports Third-Quarter 2022 Earnings Madison, Wis., Nov. 03, 2022?MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the third quarter of 2022. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the third quarter of 2022 were $33.7 million, or $0.93 cents per share, compared to $34.9 million, or $0.97 cents per share, for the sa

November 3, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 3, 2022 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

September 13, 2022 CORRESP

* * * * *

Jared J. Bushek Vice President Finance, Chief Information Officer and Treasurer 608-252-7238 September 13, 2022 Sent Via EDGAR Securities and Exchange Commission Division of Corporation Finance Office of Energy & Transportation 100 F Street, Northeast Washington D.C. 20549 Attention: Ms. Jenifer Gallagher Staff Accountant Office of Energy & Transportation Mr. Karl Hiller Branch Chief Office of Ene

August 19, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 19, 2022 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

August 19, 2022 EX-99.1

1

EXHIBIT 99.1 News MGE Energy Increases Dividend for 47th Consecutive Year Madison, Wis., Aug 19, 2022?The board of directors of MGE Energy, Inc. (Nasdaq: MGEE), today increased the regular quarterly dividend rate approximately 5% to $0.4075 per share on the outstanding shares of the company's common stock. The dividend is payable Sept. 15, 2022, to shareholders of record Sept. 1, 2022. This raises

August 4, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 4, 2022 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE E

August 4, 2022 EX-99.1

1 MGE Energy, Inc. (In thousands, except per share amounts)

EXHIBIT 99.1 News MGE Energy Reports Second-Quarter 2022 Earnings Madison, Wis., Aug 04, 2022?MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the second quarter of 2022. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the second quarter of 2022 were $21.8 million, or $0.60 cents per share, compared to $22.9 million, or $0.63 cents per share, for the

August 4, 2022 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: June 30, 2022 ☐ Transition Report Pursuant to

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: June 30, 2022 ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorpor

May 19, 2022 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 17, 2022 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ene

May 9, 2022 DEFA14A

Reminder to vote your shares posted on mgeenergy.com on Friday, May 6, 2022.

DEFA14A 1 f20220509defa-14aaddition1.htm Reminder to vote your shares posted on mgeenergy.com on Friday, May 6, 2022. VOTE YOUR SHARES We encourage all shareholders to exercise their right and responsibility to vote their shares. Whether shareholders own shares through a brokerage firm or are directly registered with MGE Energy, we make voting easy. Return your vote form through the mail or vote o

May 5, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 5, 2022 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ener

May 5, 2022 EX-99.1

1 MGE Energy, Inc. (In thousands, except per share amounts)

EXHIBIT 99.1 News MGE Energy Reports First-Quarter 2022 Earnings Madison, Wis., May 05, 2022?MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the first quarter of 2022. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the first quarter of 2022 were $34.4 million, or $0.95 cents per share, compared to $34.9 million, or $0.97 cents per share, for the sam

May 5, 2022 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: March 31, 2022 ☐ Transition Report Pursuant to

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: March 31, 2022 ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorpo

April 14, 2022 DEFA14A

Reminder to vote information mailed to MGE Energy shareholders on Friday, April 15, 2022.

Reminder to vote information mailed to MGE Energy shareholders on Friday, April 15, 2022.

March 30, 2022 DEFA14A

Technology in Action Technology to decarbonize our grid …to engage customers in energy …to electrify transportation

The following is a transcription of Chairman, President and CEO Jeffrey Keebler's video message prepared by MGE Energy, Inc.

March 30, 2022 DEF 14A

2021 Director Compensation

BOARD OF DIRECTORS INFORMATION How Our Board Operates Board meetings are typically held at the Company's corporate headquarters in Madison, Wisconsin; however, in the interest of public health and safety during the COVID-19 pandemic, board meetings were held virtually.

February 23, 2022 EX-21

Subsidiaries of MGE Energy, Inc.

EXHIBIT 21 Subsidiaries of MGE Energy, Inc. As of December 31, 2021, the company held the following subsidiaries (all of which are formed or organized as Wisconsin entities): ? Madison Gas and Electric Company ? a regulated utility that generates and distributes electricity to approximately 159,000 customers in Dane County, Wisconsin, and purchases and distributes natural gas to approximately 169,

February 23, 2022 10-K

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended: December 31, 2021 ☐ Transition report pursuant to Sect

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended: December 31, 2021 ? Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorporatio

February 23, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 23, 2022 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

February 23, 2022 EX-99.1

1 MGE Energy, Inc. (In thousands, except per share amounts)

EXHIBIT 99.1 News MGE Energy Reports Fourth-Quarter and Full Year 2021 Earnings Madison, Wis., Feb. 23, 2022?MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the fourth quarter of 2021 and for the full year of 2021. MGE Energy's GAAP (Generally Accepted Accounting Principles) earnings for the full year of 2021 were $105.8 million, or $2.92 per share, compared to $92.4 million,

February 9, 2022 SC 13G/A

MGEE / MGE Energy, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 12)* Name of issuer: MGE Energy Inc. Title of Class of Securities: Common Stock CUSIP Number: 55277P104 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ??Ru

November 4, 2021 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: September 30, 2021 ☐ Transition Report Pursuan

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: September 30, 2021 ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Inc

November 4, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 4, 2021 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

November 4, 2021 EX-99.1

1 MGE Energy, Inc. (In thousands, except per share amounts)

EXHIBIT 99.1 News MGE Energy Reports Third-Quarter Earnings Madison, Wis., Nov. 4, 2021?MGE Energy, Inc. (Nasdaq: MGEE), today reported financial results for the third quarter of 2021. MGE Energy?s GAAP (Generally Accepted Accounting Principles) earnings for the third quarter of 2021 were $34.9 million, or $0.97 per share, compared to $31.8 million, or $0.88 per share, for the same period in the p

November 3, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 3, 2021 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

November 3, 2021 EX-99.1

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MGE Announces Plans to End Remaining Use of Coal Plan to end the use of coal as a primary fuel at Elm Road will help MGE achieve its carbon reduction goals.

October 15, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 October 15, 2021 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

August 20, 2021 EX-99

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EXHIBIT 99.1 News MGE Energy Increases Dividend for 46th Consecutive Year Madison, Wis., Aug 20, 2021?The board of directors of MGE Energy, Inc. (Nasdaq: MGEE) today increased the regular quarterly dividend rate approximately 5% to $0.3875 per share on the outstanding shares of the company's common stock. The dividend is payable Sept. 15, 2021, to shareholders of record Sept. 1, 2021. This raises

August 20, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 20, 2021 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

August 5, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 5, 2021 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE E

August 5, 2021 EX-99

MGE Energy, Inc.

EX-99 2 ex991.htm EXHIBIT 99.1 EXHIBIT 99.1 News MGE Energy Reports Second-Quarter Earnings Madison, Wis., Aug 05, 2021—MGE Energy, Inc. (Nasdaq: MGEE) today reported financial results for the second quarter of 2021. MGE Energy’s GAAP (Generally Accepted Accounting Principles) earnings for the second quarter of 2021 were $22.9 million, or $0.63 per share, compared to $18.8 million, or $0.53 per sh

August 5, 2021 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: June 30, 2021 ☐ Transition Report Pursuant to

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: June 30, 2021 ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorpor

July 21, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 July 16, 2021 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE En

May 20, 2021 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 18, 2021 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ene

May 13, 2021 EX-4

$60,000,000 2.48% Senior Notes, Series A, due August 15, 2031 $40,000,000 2.63% Senior Notes, Series B, due June 15, 2033 Note Purchase Agreement Dated May 10, 2021 TABLE OF CONTENTS

EXECUTION VERSION Exhibit 4.1 Madison Gas and Electric Company $60,000,000 2.48% Senior Notes, Series A, due August 15, 2031 $40,000,000 2.63% Senior Notes, Series B, due June 15, 2033 Note Purchase Agreement Dated May 10, 2021 TABLE OF CONTENTS SECTIONHEADINGPAGE Section 1.Authorization of Notes1 Section 2.Sale and Purchase of Notes1 Section 3.Closing2 Section 4.Conditions to Closings2 Section 4.

May 13, 2021 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 10, 2021 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ene

May 6, 2021 EX-99

MGE Energy, Inc.

EXHIBIT 99.1 News MGE Energy Reports First-Quarter Earnings Madison, Wis., May 06, 2021?MGE Energy, Inc. (Nasdaq: MGEE) today reported financial results for the first quarter of 2021. MGE Energy?s GAAP (Generally Accepted Accounting Principles) earnings for the first quarter of 2021 were $ 34.9 million, or $ 0.97 per share, compared to $ 26.0 million, or $ 0.75 per share, for the same period in th

May 6, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 6, 2021 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ener

May 6, 2021 10-Q

Quarterly Report - FORM 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: March 31, 2021 ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorpo

April 26, 2021 DEFA14A

- FORM DEFA 14A

DEFA14A 1 f20200426-defa-14aaddition.htm FORM DEFA 14A [Reminder to vote information mailed to MGE Energy shareholders on Monday, April 26, 2021.]

April 21, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 April 16, 2021 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE E

March 31, 2021 DEFA14A

Powering Forward Sustainably

The following is a transcription of Chairman, President and CEO Jeffrey Keebler's video message prepared by MGE Energy, Inc.

March 31, 2021 DEF 14A

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS OF MGE ENERGY, INC.

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS OF MGE ENERGY, INC. March 31, 2021 Regardless of whether you plan to attend the meeting, please take a moment to vote your proxy. Based on restrictions and guidance from federal, state, and local public health agencies concerning COVID-19, MGE Energy is holding its Annual Meeting virtually, using the same format as last year's meeting. As always, we encoura

March 31, 2021 DEFA14A

[Additional information mailed to MGE Energy shareholders on or about March 31, 2021.]

[Additional information mailed to MGE Energy shareholders on or about March 31, 2021.]

February 24, 2021 EX-10

Form of Notice of Grant of Performance Unit Award Agreement for Employees pursuant to the MGE Energy Inc., 2021 Long-Term Incentive Plan

Exhibit 10.44 MGE ENERGY, INC. NOTICE OF GRANT OF PERFORMANCE UNITS ? Employee MGE Energy, Inc., a Wisconsin corporation (the ?Company?) has granted to the Participant an award (the ?Award?) of certain units pursuant to the MGE Energy, Inc. 2021 Long-Term Incentive Plan (the ?Plan?), each of which represents the right to receive on the applicable Settlement Date Shares or cash, as follows: Partici

February 24, 2021 EX-21

Subsidiaries of MGE Energy, Inc.

EX-21 10 ex21.htm EXHIBIT 21: SUBSIDIARIES OF MGEE EXHIBIT 21 Subsidiaries of MGE Energy, Inc. As of December 31, 2020, the company held the following subsidiaries (all of which are formed or organized as Wisconsin entities): • Madison Gas and Electric Company – a regulated utility that generates and distributes electricity to approximately 157,000 customers in Dane County, Wisconsin, and purchase

February 24, 2021 EX-99

MGE Energy, Inc.

EXHIBIT 99.1 News MGE Energy Reports Fourth-Quarter Earnings Madison, Wis., Feb. 24, 2021?MGE Energy, Inc. (Nasdaq: MGEE) today reported financial results for the fourth quarter and full year of 2020. MGE Energy?s GAAP (Generally Accepted Accounting Principles) earnings for the full year of 2020 were $92.4 million, or $2.60 per share, compared to $86.9 million, or $2.51 per share, for the same per

February 24, 2021 EX-10

Form of Performance Unit Award Agreement

Exhibit 10.43 MGE ENERGY, INC. PERFORMANCE UNITS AWARD AGREEMENT ? Employee MGE Energy, Inc., a Wisconsin corporation (the ?Company?), has granted to the Participant named in the Notice of Grant of Performance Units (the ?Grant Notice?) to which this Performance Units Award Agreement (the ?Agreement?) is attached an Award consisting of Performance Units (each a ?Unit?) subject to the terms and con

February 24, 2021 EX-10

Form of Notice of Grant of Restricted Stock Award Agreement for Employees and Directors pursuant to the MGE Energy Inc., 2021 Long-Term Incentive Plan

Exhibit 10.47 MGE ENERGY, INC. NOTICE OF GRANT OF RESTRICTED STOCK AWARDS ? Employee or Director MGE Energy, Inc., a Wisconsin corporation (the ?Company?) has granted to the Participant an award (the ?Award?) of certain Restricted Stock Awards pursuant to the MGE Energy, Inc. 2021 Long-Term Incentive Plan (the ?Plan?), each of which represents the right to receive on the Grant Date one (1) Share o

February 24, 2021 EX-10

Form of Restricted Stock Units Agreement for Employees pursuant to the MGE Energy Inc., 2021 Long-Term Incentive Plan

Exhibit 10.48 MGE ENERGY, INC. RESTRICTED STOCK UNITS AWARD AGREEMENT ? Employee MGE Energy, Inc., a Wisconsin corporation (the ?Company?), has granted to the Participant named in the Notice of Grant of Restricted Stock Units (the ?Grant Notice?) to which this Restricted Stock Units Award Agreement (the ?Agreement?) is attached an Award consisting of Restricted Stock Units (each a ?Unit?) subject

February 24, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 24, 2021 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

February 24, 2021 EX-10

Form of Notice of Grant of Restricted Stock Units Agreement for Employees and Directors pursuant to the MGE Energy Inc., 2021 Long-Term Incentive Plan

Exhibit 10.50 MGE ENERGY, INC. NOTICE OF GRANT OF RESTRICTED STOCK UNITS - Employee or Director MGE Energy, Inc., a Wisconsin corporation (the ?Company?) has granted to the Participant an award (the ?Award?) of certain units pursuant to the MGE Energy, Inc. 2021 Long-Term Incentive Plan (the ?Plan?), each of which represents the right to receive on the applicable Settlement Date one (1) Share of C

February 24, 2021 10-K

Annual Report - FORM 10-K

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ?Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended: December 31, 2020 ?Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorporation,

February 24, 2021 EX-10

Form of Restricted Stock Award Agreement for Employees pursuant to the MGE Energy Inc., 2021 Long-Term Incentive Plan

Exhibit 10.45 MGE ENERGY, INC. RESTRICTED STOCK AWARD AGREEMENT ? EMPLOYEE MGE Energy, Inc., a Wisconsin corporation (the ?Company?), has granted to the Participant named in the Notice of Grant of Restricted Stock Award (the ?Grant Notice?) to which this Restricted Stock Award Agreement (the ?Agreement?) is attached an Award consisting of Shares of Restricted Stock (each a ?Share?) subject to the

February 24, 2021 EX-10

Form of Restricted Stock Award Agreement for Directors pursuant to the MGE Energy Inc., 2021 Long-Term Incentive Plan

Exhibit 10.46 MGE ENERGY, INC. RESTRICTED STOCK AWARD AGREEMENT ? DIRECTOR MGE Energy, Inc., a Wisconsin corporation (the ?Company?), has granted to the Participant named in the Notice of Grant of Restricted Stock Award (the ?Grant Notice?) to which this Restricted Stock Award Agreement (the ?Agreement?) is attached an Award consisting of Shares of Restricted Stock (each a ?Share?) subject to the

February 24, 2021 EX-10

Form of Restricted Stock Units Agreement for Directors pursuant to the MGE Energy Inc., 2021 Long-Term Incentive Plan

Exhibit 10.49 MGE ENERGY, INC. RESTRICTED STOCK UNITS AWARD AGREEMENT ? Director MGE Energy, Inc., a Wisconsin corporation (the ?Company?), has granted to the Participant named in the Notice of Grant of Restricted Stock Units (the ?Grant Notice?) to which this Restricted Stock Units Award Agreement (the ?Agreement?) is attached an Award consisting of Restricted Stock Units (each a ?Unit?) subject

February 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)* Name of issuer: MGE Energy Inc. Title of Class of Securities: Common Stock CUSIP Number: 55277P104 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Ru

February 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: MGE Energy Inc. Title of Class of Securities: Common Stock CUSIP Number: 55277P104 Date of Event Which Requires Filing of this Statement: January 29, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rul

February 2, 2021 EX-99

Exhibit 99.1

Exhibit 99.1 Exhibit 99.1 MGE Continues Cost-Effective Transition Away from Fossil Fuels with Planned Retirement of Columbia Energy Center Co-owners' plan to retire Columbia Energy Center earlier than initially planned will help manage costs for customers and achieve carbon reduction goals. Madison, Wis., Feb. 2, 2021—Madison Gas and Electric (MGE), Alliant Energy and Wisconsin Public Service (WPS

February 2, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 2, 2021 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

December 18, 2020 S-8

- FORM S-8

Form S-8 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 Registration Statement Under the Securities Act of 1933 MGE Energy, Inc. (Exact name of registrant as specified in its charter) Wisconsin (State or other jurisdiction of incorporation or organization) 39-2040501 (I.R.S. Employer Identification No.) 133 South Blair Street Madison, Wiscons

November 5, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 5, 2020 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

November 5, 2020 10-Q

Quarterly Report - FORM 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: September 30, 2020 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Inc

November 5, 2020 EX-99

MGE Energy, Inc.

EXHIBIT 99.1 News MGE Energy Reports Third-Quarter Earnings Madison, Wis., Nov. 5, 2020—MGE Energy, Inc. (Nasdaq: MGEE) today reported financial results for the third quarter of 2020. MGE Energy’s earnings for the third quarter of 2020 were $31.8 million, or 88 cents per share, compared to $30.7 million, or 88 cents per share, for the same period in the prior year. During the third quarter of 2020

August 26, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 21, 2020 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

August 6, 2020 EX-99

MGE Energy, Inc.

EXHIBIT 99.1 Contact: Kaya Freiman Corporate Communications Manager 608-252-7276 | [email protected] Ken Frassetto Investor Relations 608-252-4723 | [email protected] News MGE Energy Reports Second-Quarter Earnings Madison, Wis., Aug. 6, 2020—MGE Energy, Inc. (Nasdaq: MGEE) today reported financial results for the second quarter of 2020. MGE Energy’s earnings for the second quarter of 2020 were $1

August 6, 2020 10-Q

Quarterly Report - FORM 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: June 30, 2020 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorpor

August 6, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 6, 2020 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE E

July 17, 2020 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 July 17, 2020 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE En

July 17, 2020 EX-99

EXHIBIT 99.1

EXHIBIT 99.1 News MGE Energy Increases Dividend for 45th Consecutive Year Madison, Wis., July 17, 2020—The board of directors of MGE Energy, Inc. (Nasdaq: MGEE) today increased the regular quarterly dividend rate 5% to $0.37 per share on the outstanding shares of the company's common stock. The dividend is payable Sept. 15, 2020, to shareholders of record Sept. 1, 2020. This raises the annualized

May 21, 2020 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 19, 2020 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ene

May 15, 2020 EX-1

Underwriters Agreement dated May 12, 2020 by and among MGE Energy, Inc., Morgan Stanley & Co. LLC, and BofA Securities, Inc., acting severally on behalf of themselves and the several underwriters named therein.

Exhibit 1.1 Exhibit 1.1 EXECUTION VERSION 1,300,000 Shares MGE ENERGY, INC. COMMON STOCK ($1.00 PAR VALUE PER SHARE) UNDERWRITING AGREEMENT May 12, 2020 May 12, 2020 To the Managers named in Schedule I hereto for the Underwriters named in Schedule II hereto Ladies and Gentlemen: MGE Energy, Inc., a Wisconsin corporation (the “Company”), proposes to issue and sell to the several underwriters named

May 15, 2020 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 15, 2020 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ene

May 14, 2020 424B2

CALCULATION OF REGISTRATION FEE

Prospectus Supplement CALCULATION OF REGISTRATION FEE Title of Each Class of Securities to be Registered Maximum Aggregate Offering Price Amount of Registration Fee(1)(2) MGE Energy, Inc.

May 12, 2020 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 12, 2020 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ene

May 12, 2020 424B2

SUBJECT TO COMPLETION, DATED MAY 12, 2020 Preliminary Prospectus Supplement (To Prospectus dated May 12, 2020) 1,300,000 Shares Common Stock

Form 424B2 The information in this preliminary prospectus supplement is not complete and may be changed.

May 12, 2020 EX-25

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION D

Exhibit 25.1 EXHIBIT 25.1 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) || T

May 12, 2020 S-3ASR

- FORM 3ASR

Form S-3ASR Registration No. 333- Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 Registration Statement Under the Securities Act of 1933 MGE Energy, Inc. (Exact name of registrant as specified in its charter) Madison Gas and Electric Company (Exact name of registrant as specified in its charter) Wisconsin (State or other jurisdiction of incor

May 8, 2020 8-K/A

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 7, 2020 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE En

May 8, 2020 EX-99

MGE Energy, Inc.

EXHIBIT 99.1 News MGE Energy Reports First-Quarter Earnings Madison, Wis., May 7, 2020—MGE Energy, Inc. (Nasdaq: MGEE) today reported financial results for the first quarter of 2020. MGE Energy's earnings for the first quarter of 2020 were $26.0 million, or 75 cents per share, compared to $24.0 million, or 69 cents per share, for the same period in the prior year. During the first quarter of 2020,

May 7, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 7, 2020 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE Ener

May 7, 2020 10-Q

Quarterly Report - FORM 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: March 31, 2020 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorpo

May 7, 2020 EX-99

MGE Energy, Inc.

EXHIBIT 99.1 News MGE Energy Reports First-Quarter Earnings Madison, Wis., May 7, 2020—MGE Energy, Inc. (Nasdaq: MGEE) today reported financial results for the first quarter of 2020. MGE Energy's earnings for the first quarter of 2020 were $26.0 million, or 75 cents per share, compared to $24.0 million, or 69 cents per share, for the same period in the prior year. During the first quarter of 2020,

April 28, 2020 DEFA14A

- FORM DEFA 14A

Form DEFA-14a [Reminder to vote information mailed to MGE Energy shareholders on Tuesday, April 28, 2020.]

April 24, 2020 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 April 20, 2020 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE E

April 24, 2020 EX-4

LOAN AGREEMENT CITY OF MADISON, WISCONSIN MADISON GAS AND ELECTRIC COMPANY Dated as of April 1, 2020

EXHIBIT 4.1 EXHIBIT 4.1 LOAN AGREEMENT Between CITY OF MADISON, WISCONSIN and MADISON GAS AND ELECTRIC COMPANY Dated as of April 1, 2020 NOTE: THIS LOAN AGREEMENT HAS BEEN ASSIGNED TO, AND IS SUBJECT TO A SECURITY INTEREST IN FAVOR OF, U.S. BANK NATIONAL ASSOCIATION, AS TRUSTEE UNDER AN INDENTURE OF TRUST DATED AS OF APRIL 1, 2020, WITH THE CITY OF MADISON, WISCONSIN, AS AMENDED OR SUPPLEMENTED. I

April 24, 2020 EX-4

BOND PURCHASE AND COVENANTS AGREEMENT MADISON GAS AND ELECTRIC COMPANY, U.S. BANK NATIONAL ASSOCIATION Dated as of April 1, 2020 Relating to City of Madison, Wisconsin Industrial Development Revenue Refunding Bonds (Madison Gas and Electric Company P

EXHIBIT 4.2 EXHIBIT 4.2 BOND PURCHASE AND COVENANTS AGREEMENT between MADISON GAS AND ELECTRIC COMPANY, and U.S. BANK NATIONAL ASSOCIATION Dated as of April 1, 2020 Relating to $19,300,000 City of Madison, Wisconsin Industrial Development Revenue Refunding Bonds (Madison Gas and Electric Company Project) Series 2020A TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 1 1.01. Certain Defined Terms 1 1.02

March 31, 2020 DEF 14A

MGE Energy, Inc., 2021 Long-Term Incentive Plan

Converted by EDGARwiz NOTICE OF ANNUAL MEETING OF SHAREHOLDERS OF MGE ENERGY, INC.

March 30, 2020 DEFA14A

MGEE / MGE Energy, Inc. DEFA14A - - ADDITIONAL PROXY MATERIAL

Form DEFA14A The following is a transcription of Chairman, President and CEO Jeffrey Keebler's video message prepared by MGE Energy, Inc.

March 30, 2020 DEFA14A

MGEE / MGE Energy, Inc. DEFA14A - - ADDITIONAL PROXY MATERIAL

Form DEFA14A [Additional information mailed to MGE Energy shareholders on or about March 30, 2020.]

March 24, 2020 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 March 20, 2020 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE E

March 24, 2020 EX-3

i

Exhibit 3.2 Exhibit 3.2 Amended and Restated Bylaws of MGE Energy, Inc. (a Wisconsin Corporation) March 20, 2020 Table of Contents Article I. Offices 1 1.01 Principal and Business Offices. 1 1.02 Registered Office. 1 Article II. Shareholders 1 2.01 Annual Meeting. 1 2.02 Special Meeting. 1 2.03 Place of Meeting. 1 2.04 Notice of Meeting. 2 2.05 Closing of Stock Transfer Records or Fixing of Record

March 24, 2020 EX-3

Amendment to Section 2.01, 2.03, and 2. 04 of MGE Energy, Inc.'s Amended and Restated Bylaws

Exhibit 3.1 Amendment to Section 2.01, 2.03, and 2. 04 of MGE Energy, Inc.'s Amended and Restated Bylaws 2.01 Annual Meeting. The annual meeting of the shareholders shall be held at such date, time and place, if any, as may be fixed by or under the authority of the Board of Directors, for the purpose of electing Directors and for the transaction of such other business as may have been properly bro

February 27, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 February 26, 2020 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MG

February 27, 2020 EX-10

MGE Energy, Inc., 2020 Performance Unit Plan

Exhibit 10.40 EXHIBIT 10.40 MGE ENERGY, INC. 2020 PERFORMANCE UNIT PLAN MGE ENERGY, INC. 2020 PERFORMANCE UNIT PLAN 1. Purpose; Effective Date The purpose of the 2020 Performance Unit Plan (the “Plan”) of MGE Energy, Inc. and its subsidiaries and affiliates (the “Company”) is to attract, retain and motivate key employees by providing those employees incentives and reward for performance at the Com

February 27, 2020 10-K

Annual Report - FORM 10-K

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended: December 31, 2019 ☐Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorporation,

February 27, 2020 EX-4

Description of Common Stock

Exhibit 4.4 EXHIBIT 4.4 MGE Energy, Inc. DESCRIPTION OF COMMON STOCK MGE Energy, Inc.'s (the "Company") common stock, $1 par value per share, is registered under Section 12(b) of the Securities Exchange Act of 1934, as amended, and is traded on the Nasdaq Stock Market. The Company's authorized stock presently consists solely of common stock. The summary of the general terms and provisions of the C

February 27, 2020 EX-21

Subsidiaries of MGE Energy, Inc.

EXHIBIT 21 Subsidiaries of MGE Energy, Inc. As of December 31, 2019, the company held the following subsidiaries (all of which are formed or organized as Wisconsin entities): • Madison Gas and Electric Company – a regulated utility that generates and distributes electricity to approximately 155,000 customers in Dane County, Wisconsin, and purchases and distributes natural gas to approximately 163,

February 27, 2020 EX-99

MGE Energy, Inc.

EXHIBIT 99.1 News MGE Energy Reports Fourth-Quarter Earnings Madison, Wis., Feb. 26, 2020—MGE Energy, Inc. (Nasdaq: MGEE) today reported financial results for the fourth quarter and full year of 2019. MGE Energy’s GAAP (Generally Accepted Accounting Principles) earnings for the full year of 2019 were $86.9 million, or $2.51 per share, compared to $84.2 million, or $2.43 per share, for the same per

February 27, 2020 EX-10

Form of 2020 Performance Unit Award Agreement

Exhibit 10.41 EXHIBIT 10.41 MGE ENERGY, INC. 2020 PERFORMANCE UNIT PLAN AWARD AGREEMENT Participant Name: [Name] Number of Units: Total Units [Will equal performance units and restricted units] Number of Initial Performance Units: [Performance Units] (subject to adjustment as described in Exhibit 2 of this Agreement) Number of Restricted Units: [Restricted Units] Grant Date: [Grant Date] Grant Yea

February 12, 2020 SC 13G/A

MGEE / MGE Energy, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 9)* Name of issuer: MGE Energy Inc Title of Class of Securities: Common Stock CUSIP Number: 55277P104 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule

November 6, 2019 EX-99

MGE Energy, Inc.

EXHIBIT 99.1 News MGE Energy Reports Third-Quarter Earnings Madison, Wis., Nov. 6, 2019—MGE Energy, Inc. (Nasdaq: MGEE) today reported financial results for the third quarter of 2019. MGE Energy’s earnings for the third quarter of 2019 were $30.7 million, or 88 cents per share, compared to $29.5 million, or 85 cents per share, for the same period in the prior year. During the third quarter of 2019

November 6, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 November 6, 2019 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

November 6, 2019 10-Q

Quarterly Report - FORM 10-Q

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: September 30, 2019 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Inc

September 4, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 29, 2019 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

September 3, 2019 EX-4

Table of Contents

Exhibit 4.1 EXHIBIT 4.1 Madison Gas and Electric Company $50,000,000 2.94% Senior Notes due November 15, 2029 Note Purchase Agreement Dated August 28, 2019 Table of Contents Section Heading Page Section 1. Authorization of Notes 1 Section 2. Sale and Purchase of Notes 1 Section 3. Closing 1 Section 4. Conditions to Closing 2 Section 4.1. Representations and Warranties 2 Section 4.2. Performance; N

September 3, 2019 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 28, 2019 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

August 16, 2019 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 16, 2019 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE

August 16, 2019 EX-99

EXHIBIT 99.1

EXHIBIT 99.1 News MGE Energy Increases Dividend for 44th Consecutive Year Madison, Wis., Aug. 16, 2019—The board of directors of MGE Energy, Inc. (Nasdaq: MGEE) today increased the regular quarterly dividend rate over 4% to $0.3525 per share on the outstanding shares of the company’s common stock. The dividend is payable Sept. 15, 2019, to shareholders of record Sept. 1, 2019. This raises the annu

August 7, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 August 7, 2019 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965 MGE E

August 7, 2019 EX-99

MGE Energy, Inc.

EXHIBIT 99.1 News MGE Energy Reports Second-Quarter Earnings Madison, Wis., Aug. 7, 2019—MGE Energy, Inc. (Nasdaq: MGEE) today reported financial results for the second quarter of 2019. MGE Energy’s earnings for the second quarter of 2019 were $15.5 million, or 45 cents per share, compared to $18.3 million, or 53 cents per share, for the same period in the prior year. During the second quarter of

August 7, 2019 10-Q

Quarterly Report -

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QuarterlyReport Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: June 30, 2019 ☐ TransitionReport Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File No. Name of Registrant, State of Incorporat

May 16, 2019 8-K

Submission of Matters to a Vote of Security Holders

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 14, 2019 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-4996

May 16, 2019 8-K

Current Report

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May 8, 2019 EX-99

MGE Energy, Inc. (In thousands, except per share amounts) Three Months Ended March 31, 2019 2018 Operating revenue $167,569 $157,632 Operating income $30,512 $26,188 Net income $24,007 $20,001 Earnings per share (basic and diluted) $0.69 $0.58 Weight

Exhibit 99.1 EXHIBIT 99.1 News MGE Energy Reports First-Quarter Earnings Madison, Wis., May 8, 2019—MGE Energy, Inc. (Nasdaq: MGEE) today reported financial results for the first quarter of 2019. MGE Energy's earnings for the first quarter of 2019 were $24.0 million, or 69 cents per share, compared to $20.0 million, or 58 cents per share, for the same period in the prior year. During the first qua

May 8, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 May 8, 2019 Date of report (date of earliest event reported) Commission File No. Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 000-49965

May 8, 2019 8-K

Current Report

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May 8, 2019 10-Q

Quarterly Report - FORM 10-Q PDF

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May 8, 2019 10-Q

Quarterly Report - FORM 10-Q

Form 10-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q [X] Quarterly Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 For the quarterly period ended: March 31, 2019 [ ] Transition Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 For the transition period from to . Commission File No. Name of Registrant,

April 30, 2019 DEFA14A

MGEE / MGE Energy, Inc. DEFA14A FORM DEFA14A

Form DEFA14A Reminder to vote flyer mailed to MGE Energy Shareholders on or about May 1, 2019.

April 30, 2019 DEFA14A

MGEE / MGE Energy, Inc. DEFA14A FORM DEFA14A PDF

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April 5, 2019 DEFA14A

MGEE / MGE Energy, Inc. ADDITIONAL PROXY MATERIAL

Form DEFA14A Reminder to vote sleeve mailed to MGE Energy Shareholders on or about April 5, 2019.

April 5, 2019 DEFA14A

MGEE / MGE Energy, Inc. ADDITIONAL PROXY MATERIAL PDF

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March 26, 2019 DEFA14A

MGEE / MGE Energy, Inc. VIDEO MESSAGE PDF

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March 26, 2019 DEFA14A

MGEE / MGE Energy, Inc. VIDEO MESSAGE PDF

Form DEFA14A The following is a transcription of Chairman, President and CEO Jeffrey Keebler's video message prepared by MGE Energy, Inc.

March 25, 2019 DEF 14A

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS OF MGE ENERGY, INC.

Form DEF 14A NOTICE OF ANNUAL MEETING OF SHAREHOLDERS OF MGE ENERGY, INC. March 25, 2019 Instructions on making a reservation are provided on page 3 of this proxy statement. Regardless of whether you plan to attend, please take a moment to vote your proxy. The meeting will be held as follows: Date: Time: Place: Tuesday, May 14, 2019 11:00 a.m., local time Madison Marriott West 1313 John Q. Hammons

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