# EDGAR Filing Document

**Accession Number:** 0001161728
**File Stem:** 0001161728-26-000006
**Filing Date:** 2026-4
**Character Count:** 2224
**Document Hash:** ac6ef1aace7f4a22da61dc252fd2fda1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001161728-26-000006.hdr.sgml**: 20260402

**ACCESSION NUMBER**: 0001161728-26-000006

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260402

**DATE AS OF CHANGE**: 20260402

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MGE ENERGY INC
- **CENTRAL INDEX KEY:** 0001161728
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC, GAS & SANITARY SERVICES [4900]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 392040501
- **STATE OF INCORPORATION:** WI
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-49965
- **FILM NUMBER:** 26831151

**BUSINESS ADDRESS:**
- **STREET 1:** 133 SOUTH BLAIR STREET
- **STREET 2:** PO BOX 1231
- **CITY:** MADISON
- **STATE:** WI
- **ZIP:** 53701-1231
- **BUSINESS PHONE:** (608) 252-7000

**MAIL ADDRESS:**
- **STREET 1:** 133 SOUTH BLAIR STREET
- **STREET 2:** PO BOX 1231
- **CITY:** MADISON
- **STATE:** WI
- **ZIP:** 53701-1231

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|:---|
| &nbsp;&nbsp; <br>**UNITED STATES**<br>**SECURITIES AND EXCHANGE COMMISSION**<br>**Washington, D.C. 20549**<br>|
| **SCHEDULE 14A**<br>**Proxy Statement Pursuant to Section 14(a) of the**<br>**Securities Exchange Act of 1934** |
| &nbsp;&nbsp; <br>Filed by registrant: ☒&nbsp;&nbsp;&nbsp;&nbsp;Filed by a Party other than the Registrant: ☐<br>Check the appropriate box:<br>☐ Preliminary Proxy Statement<br>☐ **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))**<br>☐ Definitive Proxy Statement<br>☒ Definitive Additional Materials<br>☐ Soliciting Material under §240.14a-12<br>**MGE Energy, Inc.**<br>**(Name of Registrant as Specified In Its Charter)**<br>**(Name of Person(s) Filing Proxy Statement, if other than the Registrant)**<br>Check the appropriate box:<br>☒ No Fee Required<br>☐ Fee paid previously with preliminary materials<br>☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a6(i)(1) and 0-11<br>|

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**Additional information mailed to MGE Energy shareholders on or about April 2, 2026.**

![img151685933_0.jpg](img151685933_0.jpg)

![img151685933_1.jpg](img151685933_1.jpg)

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