Derivative and Hedging Instruments

6 Months Ended

Jun. 30, 2025

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative and Hedging Instruments

Derivative and Hedging Instruments - MGE Energy and MGE.

a.Purpose.

As part of its regular operations, MGE enters into contracts, including options, swaps, futures, forwards, and other contractual commitments, to manage its exposure to commodity prices. To the extent that these contracts are derivatives, MGE assesses whether or not the normal purchases or normal sales exclusion applies. For contracts to which this exclusion cannot be applied, the derivatives are recognized in the consolidated balance sheets at fair value. MGE's financial commodity derivative activities are conducted in accordance with its electric and gas risk management program, which is approved by the PSCW and limits the volume MGE can hedge with specific risk management strategies. The maximum length of time over which cash flows related to energy commodities can be hedged is four years. If the derivative qualifies for regulatory deferral, the derivatives are marked to fair value and are offset with a corresponding regulatory asset or liability depending on whether the derivative is in a net loss or net gain position, respectively. The deferred gain or loss is recognized in earnings in the delivery month applicable to the instrument. Gains and losses related to hedges qualifying for regulatory treatment are refundable or recoverable in gas rates through the Purchased Gas Adjustment (PGA) or in electric rates as a component of the fuel rules mechanism.

b.Notional Amounts.

The gross notional volume of open derivatives is as follows:

	June 30, 2025			December 31, 2024
Commodity derivative contracts		279,520	MWh		307,640	MWh
Commodity derivative contracts		6,662,500	Dth		6,285,000	Dth
FTRs		5,159	MW		2,131	MW

c.Financial Statement Presentation.

MGE purchases and sells exchange-traded and over-the-counter options, swaps, and future contracts. These arrangements are primarily entered into to help stabilize the price risk associated with gas or power purchases. These

transactions are employed by both MGE's gas and electric segments. Additionally, as a result of the firm transmission agreements that MGE holds on electricity transmission paths in the MISO market, MGE holds financial transmission rights (FTRs). An FTR is a financial instrument that entitles the holder to a stream of revenues or charges based on the differences in hourly day-ahead energy prices between two points on the transmission grid. The fair values of these instruments are offset with a corresponding regulatory asset/liability depending on whether the instruments are in a net loss/gain position. Depending on the nature of the instrument, the gain or loss associated with these transactions will be reflected as cost of gas sold, fuel for electric generation, or purchased power expense in the delivery month applicable to the instrument. As of June 30, 2025, and December 31, 2024, the fair value of exchange traded derivatives and FTRs exceeded their cost basis by $0.7 million and $0.1 million, respectively.

The following table summarizes the fair value of the derivative instruments on the consolidated balance sheets. All derivative instruments in this table are presented on a gross basis and are calculated prior to the netting of instruments with the same counterparty under a master netting agreement as well as the netting of collateral. For financial statement purposes, instruments are netted with the same counterparty under a master netting agreement as well as the netting of collateral.

	Derivative		Derivative
(In thousands)	Assets		Liabilities		Balance Sheet Location
June 30, 2025
Commodity derivative contracts(a)	$	1,455	$	1,192	Other current assets
Commodity derivative contracts(a)		223		47	Other deferred charges
FTRs		258		—	Other current assets
December 31, 2024
Commodity derivative contracts(a)	$	927	$	1,121	Other current liabilities
Commodity derivative contracts(a)		286		140	Other deferred liabilities and other
FTRs		108		—	Other current assets

(a)As of June 30, 2025, no collateral was posted against derivative positions. As of December 31, 2024, collateral of less than $0.1 million was posted against and netted with derivative liability positions. The fair value of the derivatives disclosed in this table has not been adjusted for the collateral posted.

The following table shows the effect of netting arrangements for recognized derivative assets and liabilities that are subject to a master netting arrangement or similar arrangement on the consolidated balance sheets.

Offsetting of Derivative Assets and Liabilities

(In thousands)	Gross Amounts		Gross Amounts Offset in Balance Sheets			Collateral Posted Against Derivative Positions			Net Amount Presented in Balance Sheets
June 30, 2025
Assets
Commodity derivative contracts	$	1,678	$	(1,239	)	$	—		$	439
FTRs		258		—			—			258
Liabilities
Commodity derivative contracts		1,239		(1,239	)		—			—
December 31, 2024
Assets
Commodity derivative contracts	$	1,213	$	(1,213	)	$	—		$	—
FTRs		108		—			—			108
Liabilities
Commodity derivative contracts		1,261		(1,213	)		(48	)		—

The following tables summarize the unrealized and realized gains/losses related to the derivative instruments on the consolidated balance sheets and the consolidated statements of income.

	2025						2024
(In thousands)	Current and Long-Term Regulatory Asset (Liability)			Other Current Assets			Current and Long-Term Regulatory Asset (Liability)			Other Current Assets
Three Months Ended June 30:
Balance as of April 1,	$	(1,860	)	$	78		$	3,009		$	275
Unrealized loss		2,118			—			758			—
Realized (loss) gain reclassified to a deferred account		(288	)		288			(537	)		537
Realized (loss) gain reclassified to income statement		(667	)		30			(1,284	)		(285	)
Balance as of June 30,	$	(697	)	$	396		$	1,946		$	527
Six Months Ended June 30:
Balance as of January 1,	$	(60	)	$	388		$	5,226		$	1,569
Unrealized loss		362			—			2,898			—
Realized (loss) gain reclassified to a deferred account		263			(263	)		(2,694	)		2,694
Realized (loss) gain reclassified to income statement		(1,262	)		271			(3,484	)		(3,736	)
Balance as of June 30,	$	(697	)	$	396		$	1,946		$	527

	Realized Losses (Gains)
	2025					2024
(In thousands)	Fuel for Electric Generation/ Purchased Power		Cost of Gas Sold			Fuel for Electric Generation/ Purchased Power		Cost of Gas Sold
Three Months Ended June 30:
Commodity derivative contracts	$	198	$	—		$	1,328	$	—
FTRs		439		—			241		—
Six Months Ended June 30:
Commodity derivative contracts	$	596	$	(203	)	$	3,754	$	3,265
FTRs		598		—			201		—

MGE's commodity derivative contracts and FTRs are subject to regulatory deferral. These derivatives are marked to fair value and are offset with a corresponding regulatory asset or liability. Realized gains and losses are deferred on the consolidated balance sheets and are recognized in earnings in the delivery month applicable to the instrument. As a result of the treatment described above, there are no unrealized gains or losses that flow through earnings.

Certain counterparties extend MGE a credit limit. If MGE exceeds these limits, the counterparties may require collateral to be posted. As of June 30, 2025, and December 31, 2024, no counterparties were in a net liability position.

Nonperformance of counterparties to the non-exchange traded derivatives could expose MGE to credit loss. However, MGE enters into transactions only with companies that meet or exceed strict credit guidelines, and it monitors these counterparties on an ongoing basis to mitigate nonperformance risk in its portfolio. As of June 30, 2025, no counterparties had defaulted.