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MGE ENERGY INC

For the period ended Dec 31, 2025. Filed Feb 24, 2026.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Feb 24, 2026

MGEE$80.19-0.1%Stored close · as of Nov 9, 2026

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Item 9B. Other Information

During the three months ended December 31, 2025, no director or officer of MGE Energy or Madison Gas and Electric adopted orterminated a Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement, as defined in Item 408(a) of Regulation S-K.

MGE

On February 19, 2026, Madison Gas and Electric Company (“MGE”) entered into an Asset Sale Agreement, pursuant to which MGE has agreed to acquire a 33.4% ownership interest in the RockGen Energy Center, a simple‑cycle natural gas‑fired electric generating facility located near Cambridge, Wisconsin.

The ownership interest represents approximately 168 MW of existing gas‑fired electric generation capacity. The aggregate purchase price for the ownership interest is $203 million, subject to customary purchase price adjustments.

The consummation of the transaction is subject to the receipt of required regulatory approvals, including approval from the PSCW, and the satisfaction of other customary closing conditions. If such approvals are obtained and conditions satisfied, the transaction is currently expected to close in late 2027.

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