MGE ENERGY INC (MGEE) FY 2024 MD&A

Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations.

General

MGE Energy is an investor-owned public utility holding company operating through subsidiaries in five business segments:

•
Regulated electric utility operations, conducted through MGE, which generate and distribute electricity to approximately 167,000 customers in Dane County, Wisconsin,

•
Regulated gas utility operations, conducted through MGE, which distribute natural gas to approximately 178,000 customers in seven south-central and western Wisconsin counties,

•
Nonregulated energy operations, conducted through MGE Power and its subsidiaries, which owns interests in electric generating capacity that is leased to MGE,

•
Transmission investments, representing our equity investment in ATC, which owns and operates electric transmission facilities primarily in Wisconsin, and ATC Holdco, a company created to facilitate out-of-state electric transmission development and investments, and

•
All other, which includes investing in companies and property that relate to the regulated operations and financing the regulated operations, through its wholly owned subsidiaries CWDC, MAGAEL, and North Mendota, and corporate operations and services.

Our primary focus is our core utility customers, which are served by MGE as well as creating long-term value for our shareholders. MGE seeks to meet its customers' expectations for reasonably priced, reliable electric and gas service provided in a responsible manner. That responsibility is manifested in actions MGE has taken, and will continue to take, to achieve its goals of 80% carbon reduction by 2030 (from 2005 levels) and net-zero carbon by 2050, including:

•
reducing the proportion that coal generation represents in its generation mix, as evidenced by its announcements of the retirement of Columbia (a coal generation plant) and the planned change in the Elm Road Units fuel source from coal to natural gas, and

•
growing ownership of renewable generation sources.

MGE will continue to focus on growing earnings while controlling operating and fuel costs. MGE's goal is to provide safe and efficient operations in addition to providing customer value. We believe it is critical to maintain a strong credit rating consistent with financial strength in MGE in order to accomplish these goals.

The ownership/leasing structure for our nonregulated energy operations was adopted under applicable state regulatory guidelines for MGE's participation in these generation facilities, consisting principally of a stable return on the equity investment in the new generation facilities over the term of the related leases. The nonregulated energy operations include an ownership interest in two coal-fired generating units in Oak Creek, Wisconsin and a partial ownership of a cogeneration project on the UW-Madison campus. A third party operates the units in Oak Creek, and MGE operates the cogeneration project. Due to the nature of MGE's participation in these facilities, the results of MGE Energy's nonregulated operations are also consolidated into MGE's consolidated financial position and results of operations under applicable accounting standards.

We have not included a discussion of results of operations and changes in financial position for the year ended December 31, 2023, as compared to the year ended December 31, 2022. That discussion can be found in Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations in our annual report on Form 10-K for the year ended December 31, 2023, which was filed with the SEC on February 21, 2024.

Executive Overview

We principally earn revenue and generate cash from operations by providing electric and natural gas utility services, including electric power generation and electric power and gas distribution. The earnings and cash flows from the utility business are sensitive to various external factors, including, but not limited to:

•
Weather, and its impact on customer sales,

•
Economic conditions, including current business activity and employment and their impact on customer demand,

•
Rates, regulation and regulatory issues, and their impact on the timing and recovery of costs,

•
Energy commodity prices, including natural gas prices,

•
Equity price risk pertaining to pension related assets,

•
Credit market conditions, including interest rates and our debt credit rating,

29

•
Environmental laws and regulations, including adopted and pending environmental rule changes, and

•
Other factors listed in Item 1A. Risk Factors of this Report.

During the year ended December 31, 2024, MGE Energy's earnings were $120.6 million or $3.33 per share compared to $117.7 million or $3.25 per share for the same period in the prior year. MGE's earnings for the year ended December 31, 2024, were $89.4 million compared to $90.5 million for the same period in the prior year.

MGE Energy's net income (loss) was derived from our business segments as follows:

Our net income during 2024 compared to 2023 primarily reflects the effects of the following factors:

Electric Utility

An increase in electric investments, as part of the 2024 rate case, contributed to earnings for 2024. Unfavorable weather contributed to lower electric residential sales during 2024, compared to the same period in the prior year.

Gas Utility

Lower gas retail sales resulting from warmer than normal weather in the first quarter of 2024 contributed to lower gas earnings in 2024. Gas retail sales decreased approximately 4% and heating degree days (a measure for determining the impact of weather during the heating season) decreased by approximately 6% in 2024 compared to the same period in the prior year.

Nonregulated Energy

An increase in electric generation lease revenue from the Elm Road Units and WCCF assets contributed to earnings during 2024, compared to the same period in the prior year.

Transmission Investments

In 2024, our share of ATC's earnings reflected an increase in net income for the reduction of estimated possible loss of approximately $0.8 million inclusive of interest and net of tax, related to the October 2024 developments in the MISO transmission owners complaints on authorized return on equity. See additional information in "Other Matters" below.

All Other

The decrease in net loss for all other operations during 2024 compared to 2023, is primarily related to a $1.5 million (pre-tax) voluntary contribution to the Madison Gas and Electric Foundation in 2023.

Significant Events

The following events affected our results of operations in 2024:

2024/2025 Rate Proceeding: In December 2023, the PSCW approved a 1.54% increase to electric rates and 2.44% increase to gas rates for 2024. The PSCW also approved a 4.17% increase to electric rates and 1.32% increase to gas rates in 2025. The PSCW approved a 2025 Fuel Cost Plan in December 2024. The plan lowered the 2025 increase in electric rates to 2.63%, reflecting lower expected fuel costs. See "Other Matters" below for additional information on the 2024/2025 rate proceeding.

The 2024/2025 rate order includes an earnings sharing mechanism, under which, if MGE earns above the 9.7% ROE authorized in the rate order: (i) MGE will retain 100% of earnings for the first 15 basis points above the authorized ROE; (ii) 50% of the next 60 basis points will be required to be deferred and returned to customers; and (iii) 100% of any remaining excess earnings will be required to be refunded to customers. The earnings calculation excludes fuel rules adjustments.

30

Large Scale Utility Projects: Large scale generation projects recently completed or under construction, are shown in the following table. Incurred costs are reflected in "Property, plant, and equipment, net" for projects placed in service, or "Construction work in progress" for projects under construction on the consolidated balance sheets.

(a)
Excluding AFUDC.

(b)
MGE received specific approval to recover 100% AFUDC on Paris, Darien, and Koshkonong. After tax, MGE recognized $4.8 million, $2.7 million, and $0.2 million of AFUDC equity earnings through December 31, 2024, on Paris, Darien, and Koshkonong, respectively, during construction. AFUDC has been excluded from the costs incurred in the table above.

(c)
Estimated date of commercial operation.

(d)
Estimated costs are expected to exceed PSCW previously approved CA levels. Notifications are provided to the PSCW when costs increase above CA levels. MGE has requested, and will continue to request, recovery of the updated estimated costs in its rate case proceedings.

(e)
Pending approval by the PSCW.

West Riverside. In June 2024, MGE purchased an additional 25 MW of capacity of West Riverside for approximately $25 million. After purchase, MGE owns 50 MW of capacity of West Riverside. West Riverside is a natural gas-fired generating plant.

Deferred Fuel Costs - Subject to Refund: As of December 31, 2024, MGE had deferred $3.0 million of 2024 fuel savings. These costs will be subject to the PSCW's annual review of 2024 fuel costs, expected to be completed during 2025. See Footnote 9.b. of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report for further information regarding fuel proceedings.

2023 Annual Fuel Proceeding: MGE had fuel savings in 2023. As of December 31, 2023, MGE had deferred $7.2 million of 2023 fuel costs. The PSCW has completed the annual review of 2023 fuel costs and approved MGE's return of these savings over a three-month period from October 2024 through December 2024. There was no change to the costs to be refunded as a result of the fuel rules proceedings from the amount MGE deferred in 2023.

Equity Issuance Plans: In September 2024, MGE Energy began issuing new shares of common stock to participants in our Direct Stock Purchase and Dividend Reinvestment Plan.

ATC Return on Equity: As discussed in "Other Matters" below, ATC's authorized ROE, which is used in calculating its rates and revenues, was the subject of a challenge before FERC. A decrease in ATC's ROE could result in lower equity earnings and distributions from ATC in the future. MGE Energy derived approximately 7.4% and 6.4% of net income for 2024 and 2023, respectively, from the investment in ATC.

During 2025, several items may affect our financial condition and results of operations, including:

Environmental Initiatives: There are proposed legislative rules and initiatives involving matters related to air emissions, water effluent, hazardous materials, and greenhouse gases, all of which affect generation plant capital expenditures and operating costs as well as future operational planning. Legislation and rulemaking addressing climate change and related matters could significantly affect the costs of owning and operating fossil-fueled generating plants. MGE would expect to seek and receive recovery of any such

31

costs in rates. However, it is difficult to estimate the amount of such costs due to the uncertainty as to the timing and form of any legislation or rules, the timing and effects of any judicial review, and the scope and time of the recovery of costs in rates, which may occur after those costs have been incurred and paid.

Future Generation - 80% carbon reduction target by 2030 (from 2005 levels): MGE has outlined initiatives to achieve our target.

•
Transitioning away from coal. Columbia: MGE, along with the other plant co-owners, announced plans to retire Columbia Unit 1 and Unit 2 by the end of 2029. Final timing and retirement dates for Units 1 and 2 are subject to change depending on operational, regulatory, capacity needs, and other factors impacting one or more of the Columbia co-owners. MGE has a plan, which it continues to evaluate, to replace the generation from Columbia while maintaining electric service reliability. In December 2024, MGE and Columbia's co-owners announced plans to explore converting at least one unit of Columbia to natural gas before the end of 2029.

Elm Road Units: MGE, along with the plant co-owner, announced plans to end the use of coal as a primary fuel at the Elm Road Units and transition the plant to natural gas. Transition plans and costs will be subject to PSCW approval. MGE's remaining use of coal is expected to be further reduced as the Elm Road Units transition to natural gas. By the end of 2030, coal is expected to be used only as a backup fuel at the Elm Road Units. This transition will help MGE meet its 2030 carbon reduction goals. By the end of 2032, MGE expects that the Elm Road Units will be fully transitioned away from coal, which will eliminate coal as an internal generation source for MGE.

•
Growing renewable generation. MGE is seeking to acquire a joint interest in several renewable generation projects. See our 2025-2029 capital expenditures forecast included under "Liquidity and Capital Resources" below for information on these projects.

Environmental Initiatives – Natural gas distribution: Building upon our long-standing commitment to providing affordable, sustainable energy, MGE has set a goal to achieve net-zero methane emissions from its natural gas distribution system by 2035. If MGE can accelerate plans to achieve net-zero methane emissions from its natural gas system—through the evolution of new technologies, such as renewable natural gas—it will. MGE is working to reduce overall emissions from its natural gas distribution system in a quick and cost-effective manner. For customers who want to reduce their environmental footprint further, MGE introduced a renewable natural gas program in May 2024, after approval by the PSCW. MGE purchases renewable thermal credits on behalf of customers who voluntarily elect in the program to offset the emissions associated with the customer's monthly natural gas usage.

Solar Procurement Disruptions: MGE is monitoring import regulations under the Uyghur Forced Labor Protection Act and the U.S. Department of Commerce new solar tariffs. These disruptions have a potential to impact current and future solar projects which may result in an increase in costs or delays in construction timelines. In the event that such disruptions cause costs to exceed the levels approved for specific projects, we have filed, and expect to continue to file, notifications with the PSCW and expect to request recovery of any increases in MGE's future rate proceedings. See "Other Matters" below for additional information on the solar procurement disruptions.

Executive Order – Tariffs: MGE is monitoring the actions of the Trump Administration with respect to certain proposed import tariffs on foreign goods, including those from Canada, Mexico, and/or China. These tariffs have a potential impact on cost of operations and on current and future capital projects. See "Other Matters" below for additional information on the executive orders on Tariffs.

32

The following discussion is based on the business segments as discussed in Footnote 22 of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report.

Results of Operations

Year Ended December 31, 2024, Versus the Year Ended December 31, 2023

Electric sales and revenues

The following table compares MGE's electric revenues and electric kWh sales by customer class for each of the years indicated:

Electric revenue increased $7.9 million during 2024 compared to 2023, due to the following:

•
Rate changes. In December 2023, the PSCW authorized MGE to increase 2024 rates for retail electric customers by approximately 1.54%. Rates charged to retail customers during 2024 were $6.5 million higher than those charged during 2023. See Footnote 9 of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report for further information on the rate increase. Any increase in rates associated with fuel or purchase power costs are generally offset in fuel and purchased power costs and do not have a significant impact on net income.

•
Customer fixed and demand charges. During 2024, fixed and demand charges increased $2.6 million primarily attributable to the increase in demand charges for commercial customers.

•
Sales to the market. Sales to the market typically occur when MGE has more generation and purchases in the MISO market than are needed for its customer demand. The excess electricity is then sold to other utilities or power marketers in the MISO market. During 2024, market volumes increased compared to 2023, reflecting increase in sales. However, the cost of capacity sold decreased offsetting the revenue generated from increased sales to the market from excess generation and purchases. The revenue generated from these sales is included in fuel rules costs. See fuel rules discussion in Footnote 9 of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report.

•
Volume. During 2024, residential sales decreased by approximately 1% compared to 2023. The decrease was driven by unfavorable weather.

•
Revenue subject to refund. For cost recovery mechanisms, any over-collection of revenues resulting from costs authorized to be collected from customers in rates exceeding actual costs is recorded as a reduction of revenue in the period incurred, as the over-collection is expected to be refunded to customers in a subsequent period. In the year the over-collection is refunded, rates are reduced and offset as revenue subject to refund. There is no net income impact in the year the costs are refunded.

33

Electric fuel and purchased power

The $3.6 million decrease in fuel for electric generation was due to an approximately 17% decrease in the average cost, partially offset by an approximately 13% increase in internal generation. Renewable generation increased approximately 26% driven by new generation sources including Badger Hollow II.

Excluding deferred fuel costs, purchased power decreased $9.7 million. The decrease in purchased power was due to an approximately 30% decrease in market purchases as a result of increased internal generation. Furthermore, there was an approximately 4% increase in average cost partially offsetting the decrease in market purchases. Deferred fuel cost recovered in 2024 is $6.7 million compared to $5.4 million in 2023.

Fuel and purchased power costs are generally offset by electric revenue and do not have a significant impact on net income. MGE expects to seek and receive recovery of fuel and purchased power costs outside the fuel rules bandwidth in customer rates. See Footnote 9 of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report for further information on the fuel rules bandwidth.

Gas deliveries and revenues

The following table compares MGE's gas revenues and gas therms delivered by customer class during each of the years indicated:

Gas revenue decreased $21.4 million during 2024 compared to 2023, due to the following:


Rate changes. In December 2023, the PSCW authorized MGE to increase 2024 rates for retail gas customers by 2.44%.

MGE recovers the cost of natural gas in its gas segment through the purchased gas adjustment clause (PGA). Under the PGA, MGE is able to pass through to its gas customers the cost of gas. Changes in PGA recoveries affect revenues but do not change net income in view of the pass-through treatment of the costs. Payments for natural gas decreased driving lower rates during 2024.

The average retail rate per therm excluding customer fixed charges for 2024, decreased approximately 7% compared to 2023, reflecting a decrease in natural gas commodity costs (recovered through the PGA).

•
Volume. For 2024, retail gas deliveries decreased approximately 4% compared to 2023 primarily attributable to unfavorable weather conditions in the first half of 2024.

34

•
Other. Other gas revenues decreased in 2024 compared to 2023 primarily related to lower residential customer fixed charges. The PSCW approved a reduction in the customer fixed charge component of the residential gas rate in the 2024 rate proceeding.

Cost of gas sold

Cost of gas sold decreased $24.0 million in 2024 compared to 2023. Cost per therm decreased approximately 19% and therms delivered decreased approximately 4%. MGE recovers the cost of natural gas in its gas segment through the PGA as described under "Gas deliveries and revenues" above.

Consolidated operations and maintenance expenses

For 2024, operations and maintenance expenses increased $12.7 million, compared to 2023. The following contributed to the net change:

•
Increased customer accounts costs are primarily related to collection of deferred bad debt expense from prior years. MGE has received approval to recover deferred bad debt expense from 2020 through 2023 over a two-year period beginning in 2024. Bad debt expense is generally offset by electric revenue and does not have a significant impact on net income.

•
Increased transmission costs are primarily a result of an increase in transmission rate and collection of deferred costs from prior years. Transmission costs represent ATC and MISO network transmission expenses authorized to collect in rates. The PSCW has approved MGE to defer as a regulatory asset or liability, the difference between actual costs included in rates and to be recovered or refunded in a future rate proceeding. Transmission cost is generally offset by electric revenue and does not have a significant impact on net income.

•
Increased electric production expenses are primarily related to operating and maintenance costs for Columbia and renewable generating facilities. MGE continues to add new renewable generation sites including the second phase of Badger Hollow which went online in December 2023.

•
Increased electric distribution expenses in 2024 are primarily related to the May 2024 storm response costs.

•
Decreased administrative and general costs are primarily related to a decrease in pension and other postretirement service costs. These costs are generally offset by electric revenue and do not have a significant impact on net income.

Consolidated depreciation expense

Electric depreciation expense increased $6.8 million and gas depreciation expense increased $1.2 million for 2024, compared to 2023. MGE purchased West Riverside in March 2023 and Badger Hollow II was placed in service in December 2023. The timing of the in-service dates contributed to the increase in electric depreciation expense.

Electric and gas other income and interest expense

Electric other income decreased $9.8 million and gas other income decreased $5.7 million during 2024, compared to 2023, primarily related to pension and other postretirement other than service costs.

Electric interest expense increased $2.2 million and gas interest expense increased $0.8 million during 2024, compared to 2023, primarily related to new long-term debt issuances. See Footnote 14 of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report for additional information on the new debt issuances.

35

Nonregulated Energy Operations - MGE Energy and MGE

The nonregulated energy operations are conducted through certain of MGE Energy's subsidiaries: MGE Power Elm Road (the Elm Road Units) and MGE Power West Campus (WCCF), which have been formed to own and lease electric generating capacity to assist MGE. For 2024 and 2023, net income at the nonregulated energy operations segment was $24.1 million and $22.4 million, respectively.

Transmission Investment Operations - MGE Energy

The transmission investment segment holds our interest in ATC and ATC Holdco, and its income reflects our equity in the earnings of those investments. ATC Holdco was formed in December 2016 to pursue transmission development opportunities that typically have long development and investment lead times before becoming operational. During 2024 and 2023, other income from the transmission investment segment primarily reflected ATC's operations and was $12.3 million and $10.6 million, respectively. In October 2024, FERC issued a ruling eliminating the risk premium in the ROE calculation resulting in a 4-basis point reduction in the base ROE from 10.02% to 9.98%. See Footnote 7 of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report and "Other Matters" below for additional information concerning ATC and summarized financial information regarding ATC.

All Other Operations - MGE Energy

Other income

The increase of $2.1 million in other income from all other operations during 2024 compared to 2023, is primarily related to a $1.5 million (pre-tax) voluntary contribution to the Madison Gas and Electric Foundation, MGE's philanthropic arm, in 2023.

Consolidated Income Taxes - MGE Energy and MGE

See Footnote 10 of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report for the effective tax rate reconciliation.

Noncontrolling Interest, Net of Tax - MGE

Noncontrolling interest, net of tax, reflects the accounting required for MGE Energy's interest in MGE Power Elm Road (the Elm Road Units) and MGE Power West Campus (WCCF). MGE Energy owns 100% of MGE Power Elm Road and MGE Power West Campus; however, due to the contractual agreements for these projects with MGE, the entities are considered VIEs with respect to MGE and their results are consolidated with those of MGE, the primary beneficiary of the VIEs. The following table shows MGE Energy's noncontrolling interest, net of tax, reflected on MGE's consolidated statement of income:

Liquidity and Capital Resources

MGE Energy and MGE expect to have adequate liquidity to support future operations and capital expenditures over the next twelve months. Available resources include cash and cash equivalents, operating cash flows, liquid assets, borrowing working capacity under revolving credit facilities, and access to equity and debt capital markets. In September 2024, MGE Energy began issuing new shares of common stock to participants in our Direct Stock Purchase and Dividend Reinvestment Plan. MGE Energy expects to generate funds from operations and both long-term and short-term debt financing. See "Credit Facilities" below for information regarding MGE Energy's and MGE's credit facilities.

Cash Flows

The following summarizes cash flows for MGE Energy and MGE during 2024 and 2023:

36

Cash Provided by Operating Activities

Cash flows from operating activities for MGE Energy and MGE principally reflect the receipt of customer payments for electric and gas service and outflows related to fuel for electric generation, purchased power, gas, and operation and maintenance expenditures.

The principal increases (decreases) in cash flows from operating activities during 2024, compared to 2023, were as follows:

Capital Requirements and Investing Activities

Cash outflows for MGE Energy and MGE principally reflect capital expenditures. See "Capital Expenditures" below for more information.

MGE Energy

MGE Energy's cash used for investing activities increased $11.5 million for 2024 when compared to 2023.

Capital expenditures for 2024 were $236.9 million. This amount represents an increase of $14.9 million from the expenditures made in 2023. This increase primarily reflects an increase in electric and gas utility expenditures.

Proceeds from the sale of investments increased $1.6 million during 2024, when compared to 2023.

Capital contributions in ATC and other investments decreased $2.2 million for 2024 when compared to 2023.

MGE

MGE's cash used for investing activities increased $15.0 million for 2024 when compared to 2023.

Capital expenditures for 2024 were $236.9 million. This amount represents an increase of $14.9 million from the expenditures made in 2023. This increase primarily reflects an increase in electric and gas utility expenditures.

Capital Expenditures

The following table shows MGE Energy's actual capital expenditures for both 2023 and 2024, and forecasted capital expenditures for 2025 through 2029:

Forecasted capital expenditures are based upon management's assumptions with respect to future events, including the timing and amount of expenditures associated with environmental compliance initiatives, legislative and regulatory action, supply chain and market disruptions, customer demand and support for electrification and renewable energy resources, energy conservation

37

programs, load growth, the timing of any required regulatory approvals, and the adequacy of rate recovery. Actual events may differ materially from these assumptions and result in material changes to those forecasted amounts.

MGE is targeting at least 80% carbon reduction from electric generation by 2030 (from 2005 levels) and net-zero carbon electricity by 2050. Solar, wind, and battery storage projects are a major step toward deep decarbonization and greater use of clean energy sources in pursuit of our goal. In addition, natural gas generation projects help enable MGE's clean energy transition and ensure reliability for customers as the energy supply is decarbonized. MGE continues to evaluate solar, wind, battery storage, and natural gas generation projects that align with its goals as legacy fossil fuel-fired facilities are retired.

The following table provides further detail of MGE Energy's forecasted capital expenditures, separating spending into capital project categories for 2025 through 2029:

(a)
Includes solar and wind generation and battery storage.

Our forecasted capital expenditures reflect the following significant renewable projects that are currently under construction or pending regulatory approval:

(a)
Approved by the PSCW.

(b)
Excluding AFUDC.

(c)
MGE received PSCW approval to recover 100% AFUDC.

(d)
See Footnote 6 of Notes to Consolidated Financial Statements in Part II, Item 8 of this Report for information on costs incurred.

(e)
Pending approval by the PSCW.

(f)
Estimated costs are expected to exceed PSCW previously approved CA levels. Notifications are provided to the PSCW when costs increase above CA levels. MGE has and will continue to request recovery of the updates in its rate case proceedings.

38

MGE continues to assess the potential impact of procurement disruptions on current and future solar projects that may result in an increase in costs or delays in construction timelines. In the event that such disruptions cause costs to exceed the levels approved for specific projects, we have filed, and expect to continue to file, notifications with the PSCW and expect to request recovery of any increases in MGE's future rate proceedings. See further information on procurement disruptions discussed earlier under "Executive Overview."

Columbia Energy Storage Project: In August 2024, MGE was included in a Joint Application to develop an Energy Dome closed-loop gas-to-liquid solution. This project would use vaporized liquid carbon dioxide to power an electric generating turbine. The project was awarded with a grant from the U.S. Department of Energy Office of Clean Energy Demonstrations. The grant will reduce the total estimated project expenses. MGE holds a 19% ownership interest in this project and the cost, after grant, is expected to be approximately $12 million. This project is pending approval from the PSCW.

Other local solar and battery storage projects: In 2025 through 2026, electric renewable capital expenditures include local investments in solar generation and battery storage. Forecasted total capital expenditures for those years is approximately $35 million.

West Riverside: In June 2024, MGE purchased an additional 25 MW of capacity of West Riverside for approximately $25 million. After purchase, MGE owns 50 MW of capacity of West Riverside. West Riverside is a natural gas-fired generating plant.

Electric and Gas Distribution: In 2025 through 2029, electric and gas capital expenditures include investment in enhanced metering solutions to provide customers with more timely and detailed energy use information. Investments in advanced metering infrastructure will provide additional benefits including outage and demand response and automated meter reading capabilities. Forecasted total capital expenditures for those years is approximately $52 million.

Financing Activities

The principal sources and uses of cash are related to short-term and long-term borrowings and repayments and the payment of cash dividends.

The principal increases (decreases) in cash flows from financing activities during 2024, compared to 2023, were as follows:

(a)
The noncontrolling interest arises from the accounting required for the entities, which are not owned by MGE but are consolidated as VIEs.

(b)
During 2024, MGE issued $50 million of senior unsecured notes that were used to assist with financing additional capital expenditures and other corporate obligations. During 2023, MGE issued $120 million of senior unsecured notes that were used to repay $30 million of maturing unsecured senior notes and to assist with financing additional capital expenditures and other corporate obligations. In addition, during 2023 $19.3 million of Industrial Development Revenue Bonds were tendered by their holders as required by the terms of the bonds and remarketed as permitted by those terms.

Dividend Restrictions

Dividend payments by MGE to MGE Energy are subject to restrictions arising under a PSCW rate order and, to a lesser degree, MGE's first mortgage bonds. The PSCW order restricts any dividends that MGE may pay MGE Energy if its common equity ratio, calculated in the manner used in the rate proceeding, is less than 55%. MGE's thirteen month rolling average common equity ratio as of December 31, 2024, is 57.6%, as determined under the calculation used in the rate proceeding. This restriction did not restrict MGE's payment of dividends in 2024. Cash dividends of $34.5 million and $41.0 million, respectively, were paid by MGE to MGE Energy in 2024 and 2023. The rate proceeding calculation includes indebtedness imputed amounts for MGE's outstanding purchase power capacity payments and other PSCW adjustments but does not include the indebtedness associated with MGE Power Elm Road and MGE Power West Campus, which are consolidated into MGE's financial statements but are not direct obligations of MGE.

39

MGE has covenanted with the holders of its first mortgage bonds not to declare or pay any dividend or make any other distribution on or purchase any shares of its common stock unless, after giving effect thereto, the aggregate amount of all such dividends and distributions and all amounts applied to such purchases, after December 31, 1945, shall not exceed the earned surplus (retained earnings) accumulated subsequent to December 31, 1945. As of December 31, 2024, approximately $754.6 million was available for the payment of dividends under this covenant.

MGE Power West Campus has covenanted with the holders of its outstanding senior secured notes not to declare or make distributions to us in the event that, both before and after giving effect to such distribution, its total debt to total capitalization would exceed 0.65 to 1.00 or its projected debt service coverage ratio for the following four fiscal quarters would be less than 1.25 to 1.00. Projected debt service coverage considers the projected revenues available for debt service, after deducting expenses other than debt service, in relation to projected debt service on indebtedness.

MGE Power Elm Road has covenanted with the holders of its outstanding senior secured notes not to declare or make distributions to us in the event that, both before and after giving effect to such distribution, its projected debt service coverage ratio for the following four fiscal quarters would be less than 1.25 to 1.00. Projected debt service coverage considers the projected revenues available for debt service, after deducting expenses other than debt service, in relation to projected debt service on indebtedness.

Credit Facilities

As of December 31, 2024, MGE Energy and MGE had the following aggregate bank commitments and available capacity under their credit agreements:

Borrowings under the Credit Agreements may bear interest at a rate based upon either a "floating rate" or an "Adjusted Term SOFR Rate," plus an adder based upon the credit ratings assigned to MGE's senior unsecured long-term debt securities. The "floating rate" is calculated on a daily basis as the highest of a prime rate and several adjusted interest rate indices (as set forth in the Credit Agreements), subject to a floor of one percent per annum or zero, depending on the credit agreement. The "floating rate" adder ranges from zero to 0.125%. The "Adjusted Term SOFR Rate" is calculated as provided in the Credit Agreements. The "Adjusted Term SOFR Rate" adder ranges from 0.625% to 1.125%.

The credit agreements require the borrower to maintain a ratio of consolidated debt to consolidated total capitalization not to exceed a maximum of 65%. In the case of MGE, the ratio calculation excludes assets, liabilities, revenues, and expenses included in MGE's financial statements as a result of the consolidation of VIEs, such as MGE Power Elm Road and MGE Power West Campus. As of December 31, 2024, the ratio of consolidated debt to consolidated total capitalization for each of MGE Energy and MGE, as calculated under the credit agreements' covenant, were 38.5% and 41.4%, respectively. See Footnote 13 of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report for additional information regarding the credit facilities.

Capitalization Ratios

MGE Energy's capitalization ratios were as follows:

(a)
Includes the current portion of long-term debt.

Credit Ratings

MGE Energy's and MGE's access to the capital markets, including, in the case of MGE, the commercial paper market, and their respective financing costs in those markets, may depend on the credit ratings of the entity that is accessing the capital markets.

40

None of MGE Energy's or MGE's borrowing is subject to default or prepayment as a result of a downgrading of credit ratings, although a downgrading of MGE's credit ratings would increase fees and interest charges under both MGE Energy's and MGE's credit agreements and may affect the collateral required to be posted under derivative transactions.

Contractual Obligations and Commercial Commitments for MGE Energy and MGE

MGE Energy's and MGE's contractual obligations as of December 31, 2024, representing future cash obligations that are considered to be firm commitments, are as follows:

(a)
Long-term debt consisting of secured first mortgage bonds, unsecured medium-term notes, and Industrial Development Revenue Bonds issued by MGE, and private placement debt issued by MGE, MGE Power Elm Road, and MGE Power West Campus.

(b)
Short-term debt consisting of commercial paper for MGE. See Footnote 13 of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report.

(c)
Amount represents interest expense on long-term debt. See Footnote 14 of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report for further discussion of the long-term debt outstanding as of December 31, 2024.

(d)
Leases. See Footnote 5 of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report.

(e)
Purchase obligations consist primarily of the purchase of electricity and natural gas, electric transmission, natural gas storage capacity, natural gas pipeline transportation, and the purchase and transport of coal. See Footnote 16.c. of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report.

(f)
Construction obligations consist primarily of Paris, Darien, and other renewable projects.

(g)
Other obligations are primarily related to investment commitments, environmental projects, and uncertain tax positions.

The above amounts do not include any contributions for MGE's pension and postretirement plans. MGE does not expect to need to make any required contributions to the qualified plans for 2025. The contributions for years after 2025 are not yet currently estimated. Due to uncertainties in the future economic performance of plan assets, discount rates, and other key assumptions, estimated contributions are subject to change. MGE may also elect to make additional discretionary contributions to the plans.

The above amounts do not include future capital calls by ATC and ATC Holdco. In January 2025, MGE Transco made a $2.5 million contribution to ATC. The amount and timing of future capital calls to these entities is uncertain and primarily dependent on the operations and expansion of ATC and the development activities by ATC Holdco.

MGE Energy's and MGE's commercial commitments as of December 31, 2024, representing commitments triggered by future events and including financing arrangements to secure obligations of MGE Energy and MGE, are as follows:

41

(a)
Amount includes the facilities discussed in (b) plus an additional line of credit. MGE Energy has available at any time a $50 million committed revolving credit agreement, expiring in November 2027. As of December 31, 2024, MGE Energy had no borrowings outstanding under this credit facility.

(b)
Amount includes two committed revolving credit agreements totaling $130 million expiring in November 2027. These credit facilities are used to support commercial paper issuances. As of December 31, 2024, MGE had no commercial paper outstanding backed by the facilities and no borrowings outstanding. As of December 31, 2024, MGE had $0.6 million of letters of credit issued inside credit facilities.

Other Matters

Rate Matters

In December 2023, the PSCW approved the 2024/2025 rate application for an increase of 1.54% for electric rates and a 2.44% increase for gas rates in 2024. The PSCW also approved a 4.17% increase for electric rates and a 1.32% increase to gas rates for 2025. The PSCW approved a 2025 Fuel Cost Plan in December 2024. The plan lowered the 2025 increase in electric rates to 2.63%.

Details related to MGE's 2024/2025 rate proceeding are shown in the table below:

(a)
Average rate base amounts reflect MGE's allocated share of rate base and do not include construction work in progress (CWIP) or a cash working capital allowance and were calculated using a forecasted 13-month average for the test periods. The PSCW provides a return on selected CWIP and a cash working capital allowance by adjusting the percentage return on rate base.

(b)
50% of the forecasted 13-month average CWIP for the test periods which earns an AFUDC return. Projects eligible to earn 100% AFUDC are excluded from this balance and discussed further in the Management Discussion and Analysis of Financial Condition and Results of Operations - Significant Events section.

(c)
Authorized returns on common equity may not be indicative of actual returns earned or projections of future returns, as actual returns will be affected by the volume of electricity or gas sold.

See Footnote 9.a. of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report for further discussion of rate proceedings.

ATC

MISO transmission owners, including ATC, are involved in two complaints filed at FERC by several parties challenging that the base ROE in effect for MISO transmission owners, including ATC, was no longer just and reasonable. Each complaint provided for a 15-month statutory refund period: November 12, 2013 through February 11, 2015 (the "First Complaint Period") and February 12, 2015 through May 11, 2016 (the "Second Complaint Period").

In May 2020, FERC issued an order further refining the methodology for setting authorized ROE. This refined methodology increased the authorized ROE from 9.88% to 10.02%. This base ROE is effective for the First Complaint Period and for all periods following September 2016. This order also dismissed the second complaint. Accordingly, no refunds were ordered for the Second Complaint Period.

Several petitions for review of FERC’s prior orders were filed with the United States Court of Appeals for the District of Columbia Circuit (the "Court") and an oral argument was held in November 2021. In August 2022, the Court ruled that four of the five arguments made by the complaining parties were unpersuasive. However, the Court agreed that FERC’s decision to reintroduce a risk-premium model into its ROE methodology was arbitrary and capricious. The Court vacated the underlying orders for the First Complaint Period and remanded to FERC for further proceedings. In October 2024, FERC issued a ruling eliminating the risk premium in the ROE calculation resulting in a 4-basis point reduction in the base ROE from 10.02% to 9.98%. FERC also affirmed its prior decision to dismiss the second complaint. ATC must provide refunds, with interest, by December 2025 covering the First Complaint Period and all periods following September 2016. Prior to the ruling, MGE Energy's share of ATC’s earnings reflected a possible loss of approximately $1.2 million, inclusive of interest and net of tax, for a possible additional refund for the First Complaint Period and

42

for the period following the Second Complaint Period. As a result of the October 2024 ruling, during the fourth quarter 2024 earnings in ATC reflected an approximately $0.8 million reduction of the reserve.

We derived approximately 7.4% and 6.4% of our net income for 2024 and 2023, respectively from our investment in ATC.

Uyghur Forced Labor Protection Act

In June 2021, the U.S. Customs and Border Protection (CBP) issued a Withhold Release Order (WRO) against silica-based products made by Hoshine Silicon Industry Co. Ltd., a company located in China's Xinjiang Uyghur Autonomous Region. As a result of this WRO, CBP is holding many solar panels imported into the United States until importers can prove that the panels do not contain materials originating from this region. The Uyghur Forced Labor Protection Act (UFLPA), a federal law that became effective on June 21, 2022, further established that all goods mined, produced, or manufactured wholly or in part in Xinjiang or by certain defined entities are prohibited from U.S. importation. Suppliers for MGE's current solar projects were able to provide the CBP sufficient documentation to meet WRO compliance requirements, and MGE expects the same will be true for UFLPA purposes, however we cannot currently predict what, if any, impact the UFLPA will have on the overall supply of solar panels into the United States and the related impact to timing and cost of solar projects included in MGE's capital plan. In the event that such disruptions cause costs to exceed the levels approved for specific projects, we have filed and expect to continue to file a notification with the PSCW and expect to request recovery of any cost increases in MGE's future rate proceedings.

U.S. Department of Commerce - Solar Cells and Modules

In August 2023, the U.S. Department of Commerce issued its final determination on a solar tariff investigation that began in 2022, finding that Chinese manufacturers were circumventing tariffs on solar panels by shipping them through four Southeast Asian countries. A 24-month exemption from tariffs for solar panel and module imports from these four countries was in effect from June 2022 until June 6, 2024. In May 2024, the Biden Administration announced that bifacial solar panels would be subject to safeguard tariffs under Section 201 of the Trade Act of 1974, from which they were previously excluded. President Biden also directed U.S. Trade Representatives to increase tariffs under Section 301 from 25% to 50% on solar cells and modules. MGE continues to assess the potential impact of these tariffs on current and future solar projects which may result in an increase in costs or delays in construction timelines. In the event that such disruptions cause costs to exceed the levels approved for specific projects, we have filed and expect to continue to file a notification with the PSCW and expect to request recovery of any cost increases in MGE's future rate proceedings.

Executive Order on Tariffs

On February 1, 2025, President Trump issued an executive order implementing a 25% additional tariff on imports from Canada and Mexico and a 10% additional tariff on imports from China. Energy resources from Canada will have a lower 10% tariff. On February 3, 2025, the Canada and Mexico tariff was immediately paused for one month. MGE continues to assess the potential impact of these tariffs to MGE's cost of operations and on current and future capital expenditures including solar or battery storage projects. These tariffs may cause an increase in costs or delays in construction timelines.

Critical Accounting Estimates - MGE Energy and MGE

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an on-going basis, estimates are evaluated, including those related to regulatory assets and liabilities, unbilled revenues, pension obligations, and income taxes. Estimates are based on historical experience and on various assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Those values may differ from these estimates under different assumptions or conditions. We believe the following critical accounting estimates affect the more significant judgments used in the preparation of the consolidated financial statements.

Regulatory Assets/Liabilities

Regulatory assets represent costs that have been deferred to future periods when it is probable that the regulator will allow future recovery of those costs through rates. MGE bases its assessment of recovery on precedents established by the regulatory body. Regulatory liabilities represent previous collections from customers that are expected to be refunded to customers in future periods. Regulatory assets and regulatory liabilities typically include deferral of energy costs, the normalization of income taxes, pension and other postretirement costs, the deferral of certain operating expenses, and non-ARO removal costs. The accounting for these regulatory assets and liabilities is in accordance with regulatory accounting standards.

43

MGE continually assesses whether the regulatory assets and liabilities meet the criteria for probability of future recovery or deferral. This assessment considers factors such as changes in the regulatory environment, recent rate orders to other regulated entities under the same jurisdiction, and the status of any pending or potential deregulation legislation. If future recovery of costs becomes no longer probable, the assets and liabilities would be recognized as current-period revenues or expenses.

Amortization of regulatory assets and liabilities is provided over the recovery or deferral period as allowed in the related regulatory agreement.

Unbilled Revenues

Revenues from the sale of electricity and gas are recorded when they are delivered to customers. Sales quantity is measured by customers' meters. Due to the large volume of those meters, it is impractical to read all of them at month end. Meters are read on a systematic basis throughout the month based on established meter-reading schedules. Consequently, at the end of any month, there exists a quantity of electricity and gas that has been delivered to customers but has not been captured by the meter readings. As a result, management must estimate revenue related to electricity and gas delivered to customers between meter-read dates and the end of the reporting period. These estimates include:

•
The amount of electricity expected to be lost in the process of its transmission and distribution to customers (referred to as line loss) and the amount of electricity actually delivered to customers.

•
The amount of gas expected to be lost in the process of distribution to customers and the amount of gas actually delivered to customers.

•
The mix of sales between customer rate classes having different rates, which is based upon historical utilization assumptions.

MGE monitors the reasonableness of the unbilled revenue estimate through the review of ratios such as unbilled electric consumption compared to billed electric sales. To confirm the reasonableness of unbilled gas, the estimated unbilled consumption is compared to various other statistics, including percent of gas available for sale, change in unbilled month-to-month and change in unbilled compared to the prior year.

Pension and Other Postretirement Benefit Plans

MGE provides employees with certain retirement (pension) and postretirement (health care and life insurance) benefits. In order to measure the expense and obligations associated with these benefits, management must make a variety of estimates, including discount rates used to value certain liabilities, the expected return on plan assets set aside to fund these costs, the rate of compensation increase, employee turnover rates, retirement rates, health care trends, mortality rates, and other factors. These accounting estimates may change due to the uncertainty attached to the estimate as well as the fact that these estimates are difficult to measure. Different estimates used could result in recognizing different amounts of expense over different periods of time. Recovery in rates is expected.

MGE uses third-party specialists to assist with evaluating its assumptions and measurement of the costs and obligations associated with these retirement benefits. The discount rate and expected return on plan assets are based primarily on available investment yields and the historical performance of plan assets. They are critical accounting estimates because they are subject to management's judgment.

•
Assumed return on assets. This assumption represents the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested (or to be invested) to provide for the benefits included in the projected benefit obligation. For 2024, MGE used an assumed return on assets of 7.24% for pension and 6.81% for other postretirement benefits. In 2025, the pension asset assumption will decrease to 7.00% and the postretirement benefit assumption will increase to 7.00%. The annual expected rate of return is based on projected long-term equity and bond returns, maturities and asset allocations. Holding other assumptions constant, for every 1% reduction in the expected rate of return on plan assets, annual pension and other postretirement cost would increase by approximately $4.4 million, before taxes.

•
Discount rate. The discount rate represents the rate at which pension obligations could effectively be settled on a present-value basis. MGE uses high-grade bond yields as a benchmark for determining the appropriate discount rate. MGE uses individual spot rates rather than a weighted average of the yield curve spot rates to measure the service cost and interest cost components for net periodic benefit cost. Holding other assumptions constant, a 0.5% decrease in the discount rate on the obligation balance as of December 31, 2024, would decrease annual pension and other postretirement cost by approximately $0.2 million, before taxes.

•
Medical trend assumptions. The health care cost trend rate is the assumed rate of increase in per-capita health care charges.

44

•
Mortality rate assumption. Expected mortality rates are used in the valuation to determine the expected duration of future benefit payments to the plan participants. MGE utilizes mortality tables and projection scales developed by the society of actuaries. These tables and scales were last updated in 2021.

See Footnote 11 of the Notes to Consolidated Financial Statements in Part II, Item 8 of this Report for additional discussion of these plans.

Income Tax Provision

MGE Energy's and MGE's income tax provisions, including both current and deferred components, are based on estimates, assumptions, calculations, and interpretation of tax statutes for the current and future years. Determination of current-year federal and state income tax will not be settled for years.

Management regularly makes assessments of tax return outcomes relative to financial statement tax provisions and adjusts the tax provisions in the period when facts become final.

Additionally, in determining the current income tax provision, an assessment is completed on temporary differences resulting from differing treatments of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are recorded in the balance sheets. For deferred tax assets, a likelihood assessment is completed to determine if these assets will be recovered through adjustments to future taxable income. Future tax benefits are recognized to the extent that realization of such benefits is more likely than not. A valuation allowance is recorded for those benefits that do not meet this criterion. An allowance is recorded reducing the asset to a value that is believed to be recoverable based on the expectation of future taxable income. The accounting estimate related to the valuation allowance is believed to be a critical accounting estimate because it is highly susceptible to change from period to period as it requires management to make assumptions about the future income over the lives of the deferred tax assets, and the impact of increasing or decreasing the valuation allowance is potentially material to the results of operations.