MGE Energy (MGEE) posts investor slides for 2026 AGA Financial Forum

Rhea-AI Filing Summary

MGE Energy, Inc. and its subsidiary Madison Gas and Electric Company furnished a current report describing a new investor presentation. On May 8, 2026, MGE Energy posted updated financial presentation slides on its Investor Relations website, also attaching them as Exhibit 99.1. Company representatives plan to use these slides in upcoming investor meetings at the 2026 AGA Financial Forum in Scottsdale, Arizona on May 17-18, 2026. The materials are furnished under Regulation FD, meaning they are provided for information purposes but are not deemed filed with the SEC.

8-K Event Classification

2 items: 7.01, 9.01

2 items

Item 7.01 Regulation FD Disclosure Disclosure

Material non-public information disclosed under Regulation Fair Disclosure, often investor presentations or guidance.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

Key Figures

Filing date: May 8, 2026 Investor forum dates: May 17-18, 2026 Exhibit 99.1: Presentation Slides +1 more

4 metrics

Filing date May 8, 2026 Date the current report and presentation disclosure were made

Investor forum dates May 17-18, 2026 Dates of the 2026 AGA Financial Forum in Scottsdale, Arizona

Exhibit 99.1 Presentation Slides Slides posted on Investor Relations website and furnished with the 8-K

Exhibit 104 Cover Page Interactive Data File Inline XBRL cover page tags embedded in the document

Key Terms

Regulation FD, Investor Relations website, Exhibit 99.1, Cover Page Interactive Data File, +1 more

5 terms

Regulation FD regulatory

"Item 7.01. Regulation FD Disclosure."

Regulation FD is a rule that prevents company insiders, like executives, from sharing important information with some people before others get it. It matters because it helps ensure all investors have equal access to key news, making the stock market fairer and reducing chances of insider trading.

Investor Relations website financial

"posted a financial presentation on its Investor Relations website."

An investor relations website is a company's online page where it shares important information with current and potential investors, like financial results, company news, and future plans. It’s like a company’s official report card that helps people understand how the business is doing and decide whether to invest or stay informed.

Exhibit 99.1 regulatory

"A copy of the presentation is attached as Exhibit 99.1."

Exhibit 99.1 is a label used in regulatory filings to identify a specific attached document, most often a company press release or investor presentation filed with securities regulators. For investors it matters because it marks an official, contemporaneous source of information directly tied to a filing—like the original news article pinned to a legal record—so traders and analysts treat it as an authoritative statement that can move a stock or clarify a company’s situation.

Cover Page Interactive Data File technical

"104 | | Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document)."

Inline XBRL technical

"the cover page XBRL tags are embedded in the Inline XBRL document"

Inline XBRL is a file format for financial filings that embeds machine-readable data tags directly inside the human-readable report, so the same document can be read by people and parsed by software. For investors it makes extracting, comparing and verifying financial numbers faster and more reliable—like a grocery list where each item also has a barcode—reducing manual errors and speeding up analysis.

Understanding 8-K Material Events →

0001161728falsefalse00000613390001161728mgee:MgeMember2026-05-082026-05-0800011617282026-05-082026-05-08

		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, 2026 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 Energy, Inc. (a Wisconsin Corporation) 133 South Blair Street Madison, Wisconsin 53788 (608) 252-7000 | mgeenergy.com		39-2040501
000-1125		Madison Gas and Electric Company (a Wisconsin Corporation) 133 South Blair Street Madison, Wisconsin 53788 (608) 252-7000 | mge.com		39-0444025

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

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

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

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

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

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

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

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

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

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

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

1

Item 7.01. Regulation FD Disclosure.

On May 8, 2026, MGE Energy, Inc. posted a financial presentation on its Investor Relations website. A copy of the presentation is attached as Exhibit 99.1. Representatives of MGE Energy, Inc. will be participating in upcoming meetings with investors at the 2026 AGA Financial Forum in Scottsdale, Arizona, May 17-18, 2026. This Form 8-K and the attached exhibits are furnished to, but not filed with, the Securities and Exchange Commission.
 

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

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

2

SIGNATURES

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

	MGE Energy, Inc. Madison Gas and Electric Company
	(Registrants)
Date: May 8, 2026	/s/ Jenny L. Lagerwall
	Jenny L. Lagerwall Assistant Vice President - Accounting and Controller (Chief Accounting Officer)

3

FAQ

What did MGE Energy (MGEE) disclose in this 8-K filing?

MGE Energy disclosed that it posted a new financial presentation on its Investor Relations website and attached the same slides as Exhibit 99.1. The information is furnished under Regulation FD, providing investors with updated materials used in upcoming investor meetings.

Where can investors find the new MGE Energy (MGEE) presentation?

Investors can access the new MGE Energy presentation on the company’s Investor Relations website. The same presentation is also included as Exhibit 99.1 to the 8-K, allowing interested parties to review the exact slides used in investor discussions.

What is Exhibit 99.1 in the MGE Energy (MGEE) 8-K?

Exhibit 99.1 consists of presentation slides that MGE Energy plans to use in upcoming investor meetings. These slides were posted on the company’s Investor Relations website and furnished to the SEC to provide consistent information to all market participants.

Why is the MGE Energy (MGEE) information described as furnished, not filed?

The company states that the current report and its exhibits are furnished, not filed, with the SEC. This means the material is provided for disclosure under Regulation FD, rather than becoming part of the company’s formal filed financial statements or periodic reports.

What upcoming investor event will use MGE Energy (MGEE) presentation slides?

Company representatives will use the presentation slides at the 2026 AGA Financial Forum in Scottsdale, Arizona, scheduled for May 17-18, 2026. The same slides are available as Exhibit 99.1, giving all investors access to the content used in those meetings.

Filing Exhibits & Attachments

2 documents

Press Releases

• EX-99.1 EX-99.1 92.1 KB

Other Documents

• EX-101 XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT 50.7 KB