Earnings release
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News Release Media Contact: Gillian Moore 24-Hour: 800.559.3853 Analyst Contact: Mike Switzer Office: 704.382.6473 November 5, 2026 Duke Energy reports third-quarter 2026 financial results ▪ Third-quarter 2026 reported and adjusted EPS of $1.99 ▪ Company narrows 2026 adjusted EPS guidance range to $6.70 to $6.80; strong year-to-date performance positions company to deliver results near the top end ▪ Executing record generation build to add 16 gigawatts of capacity by 2031, supporting customer value, economic growth and reliable service CHARLOTTE, N.C. – Duke Energy (NYSE: DUK) today announced third-quarter 2026 reported EPS, prepared in accordance with Generally Accepted Accounting Principles (GAAP), and adjusted EPS of $1.99. This is compared to reported and adjusted EPS of $1.81 for the third quarter of 2025. Adjusted EPS excludes the impact of certain items that are included in reported EPS. Higher third-quarter 2026 adjusted results were driven by recovery of infrastructure investments to reliably serve customers in our growing jurisdictions and favorable weather. These items were partially offset by higher depreciation on a growing asset base, impacts from minority interest investments, higher interest expense, and a higher effective tax rate. The company is narrowing its 2026 adjusted EPS guidance range to $6.70 to $6.80 and reaffirming its long-term adjusted EPS growth rate of 5% to 7% through 2030 off the 2025 guidance range midpoint of $6.30, with confidence to earn in the top half of the range beginning in 2028. Management does not forecast reported GAAP EPS and related long-term growth rates. “We delivered strong results through the first three quarters of the year, reflecting disciplined execution as we continue investing in the reliable service our customers depend on while keeping costs as low as possible,” said Harry Sideris, Duke Energy president and chief executive officer. “The growth across our states creates a significant opportunity, and our focus is on making sure that growth benefits everyone – protecting existing customers, strengthening reliability and supporting the communities we serve. We are well positioned to deliver on our 2026 priorities and create lasting value for our customers, communities and shareholders.” 1
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Duke Energy News Release 2 Business segment results In addition to the following summary of third-quarter 2026 business segment performance, comprehensive tables with detailed EPS drivers for the third quarter compared to prior year are provided at the end of this news release. The discussion below of third-quarter results includes both GAAP segment income and adjusted segment income, which is a non-GAAP financial measure. The tables at the end of this news release present a full reconciliation of GAAP reported results to adjusted results. Electric Utilities and Infrastructure On a reported basis and adjusted basis, Electric Utilities and Infrastructure recognized third-quarter 2026 segment income of $1,817 million, compared to segment income of $1,658 million in the third quarter of 2025. This represents an increase of $0.20 per share. Higher quarterly results were primarily driven by recovery of infrastructure investments to reliably serve customers in our growing jurisdictions and favorable weather, partially offset by higher depreciation on a growing asset base, impacts from minority interest investments, and higher interest expense. Gas Utilities and Infrastructure On a reported and adjusted basis, Gas Utilities and Infrastructure recognized third-quarter 2026 segment loss of $19 million, compared to segment loss of $26 million in the third quarter of 2025. This represents an increase of $0.01 per share. Higher quarterly results were primarily driven by lower O&M expense. Other Other primarily includes interest expense on holding company debt, other unallocated corporate costs and results from Duke Energy’s captive insurance company. On a reported and adjusted basis, Other recognized a third-quarter 2026 segment loss of $247 million, compared to segment loss of $225 million in the third quarter of 2025. This represents a decrease of $0.03 per share. Lower quarterly results were primarily driven by higher captive claims and lower returns on investments. Effective tax rate Duke Energy's consolidated reported effective tax rate for the third quarter of 2026 was 15.3% compared to 10.8% in the third quarter of 2025. The increase in the reported effective tax rate was primarily due to a decrease in the amortization of excess deferred income taxes. Duke Energy's consolidated adjusted effective tax rate was 15.5% for the third quarter of 2026 compared to 10.8% in the third quarter of 2025. The increase in the adjusted effective tax rate was primarily due to a decrease in the amortization of excess deferred income taxes. The tables at the end of this news release present a reconciliation of the reported effective tax rate to the adjusted effective tax rate. 2
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Duke Energy News Release 3 Earnings conference call for analysts An earnings conference call for analysts is scheduled at 10 a.m. ET today to discuss third-quarter 2026 financial results and other business and financial updates. The conference call will be hosted by Harry Sideris, president and chief executive officer, and Brian Savoy, executive vice president and chief financial officer. The call can be accessed via the investors' section (duke-energy.com/investors) of Duke Energy’s website or by dialing 833.461.5787 in the U.S. or 585.542.9983 outside the U.S. The confirmation code is 463805206. Please call in 10 to 15 minutes prior to the scheduled start time. Non-GAAP financial measures Management evaluates financial performance in part based on non-GAAP financial measures, including adjusted earnings, adjusted EPS and adjusted effective tax rate. Adjusted earnings and adjusted EPS represent income (loss) from continuing operations available to Duke Energy Corporation common stockholders in dollar and basic per share amounts, adjusted for the dollar and per share impact of special items. The adjusted effective tax rate is calculated using pretax earnings and income tax expense, both adjusted to include the impact of noncontrolling interests and preferred dividends and to exclude the impact of special items. Special items represent certain charges and credits, which management believes are not indicative of Duke Energy's ongoing performance. There were no special items included in the periods presented. Management uses these non-GAAP financial measures for planning, forecasting, and to report financial results to the Board of Directors, employees, and stockholders, as well as analysts and investors. The most directly comparable GAAP measures for adjusted earnings, adjusted EPS and the adjusted effective tax rate are Net Income (Loss) Available to Duke Energy Corporation common stockholders (GAAP reported earnings (loss)), Basic earnings (loss) per share Available to Duke Energy Corporation common stockholders (GAAP reported earnings (loss) per share), and the reported effective tax rate, respectively. Due to the forward-looking nature of forecasted adjusted EPS and related growth rates, the information to reconcile those amounts to the most directly comparable GAAP financial measure is not available, as management is unable to project special items, such as legal settlements, impacts of regulatory orders or asset impairments, for future periods. 3
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Duke Energy News Release 4 Management evaluates segment performance based on segment income and other net loss. Segment income and other net loss are defined as income (loss) from continuing operations net of income attributable to noncontrolling interests and preferred stock dividends. Segment income and other net loss include intercompany revenues and expenses that are eliminated in the Condensed Consolidated Financial Statements. Management also uses adjusted segment income and adjusted other net loss as measures of historical and anticipated future segment performance. Adjusted segment income and adjusted other net loss are non-GAAP financial measures, as they represent segment income and other net loss adjusted for special items, as discussed above. Management believes the presentation of adjusted segment income and adjusted other net loss provide useful information to investors, as they provide additional relevant comparison of a segment’s or Other's performance across periods. The most directly comparable GAAP measures for adjusted segment income and adjusted other net loss are segment income and other net loss. Due to the forward-looking nature of forecasted adjusted segment income and forecasted adjusted other net loss and related growth rates, the information to reconcile these amounts to the most directly comparable GAAP financial measures are not available, as management is unable to project special items, as discussed above. Duke Energy’s adjusted earnings, adjusted EPS, adjusted effective tax rate, adjusted segment income, and adjusted other net loss may not be comparable to similarly titled measures of another company because other companies may not calculate the measures in the same manner. Duke Energy Duke Energy (NYSE: DUK), a Fortune 150 company headquartered in Charlotte, N.C., is one of America’s largest energy holding companies. The company's electric utilities serve 8.7 million customers in North Carolina, South Carolina, Florida, Indiana, Ohio and Kentucky, and collectively own 55,700 megawatts of energy capacity. Its natural gas utilities serve 1.6 million customers in North Carolina, South Carolina, Ohio and Kentucky. Duke Energy is executing an energy modernization strategy, keeping customer value at the forefront as it invests in electric grid upgrades and efficient generation resources to strengthen the system and serve growing energy needs. More information is available at duke-energy.com. Follow Duke Energy on X, LinkedIn, Instagram, TikTok and Facebook for stories about the people and innovations powering its communities. Forward-Looking Information This document includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Forward-looking statements are based on management’s beliefs and assumptions and can often be identified by terms and phrases that include “anticipate,” “believe,” “intend,” “estimate,” “expect,” “continue,” “should,” “could,” “may,” “plan,” “project,” “predict,” “will,” “potential,” “forecast,” “target,” “guidance,” “outlook” or other similar terminology. Various factors may cause actual results to be materially different than the suggested outcomes within forward-looking statements; accordingly, there is no assurance that such results will be realized. These factors include, but are not limited to: 4
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Duke Energy News Release 5 ◦ The ability to implement our business strategy, including meeting forecasted load growth demand, grid and fleet modernization objectives, and reducing carbon emissions, while balancing customer reliability and keeping costs as low as possible for our customers; ◦ State, federal and foreign legislative and regulatory initiatives, including costs of compliance with existing and future environmental requirements and/or uncertainty of applicability or changes to such legislative and regulatory initiatives, including those related to climate change, as well as rulings that affect cost and investment recovery or have an impact on rate structures or market prices; ◦ The extent and timing of costs and liabilities to comply with federal and state laws, regulations and legal requirements related to coal ash remediation, including amounts for required closure of certain ash impoundments, are uncertain and difficult to estimate; ◦ The ability to timely recover eligible costs, including amounts associated with coal ash impoundment retirement obligations, asset retirement and construction costs related to carbon emissions reductions, and costs related to significant weather events, particularly in periods of heightened customer affordability concerns, bill volatility or public and political scrutiny, and to earn an adequate return on investment through rate case proceedings and the regulatory process; ◦ The costs associated with life extension, power uprate projects, fuel-cycle extensions or decommissioning nuclear facilities could prove to be more extensive than amounts estimated and all costs may not be fully recoverable through the regulatory process; ◦ The impact of extraordinary external events, such as a global pandemic, trade wars or military conflict, and their collateral consequences, including the disruption of global supply chains or the economic activity in our service territories; ◦ Costs and effects of legal and administrative proceedings, settlements, investigations and claims; ◦ Industrial, commercial and residential decline in service territories or customer bases resulting from sustained downturns of the economy, storm damage, reduced customer usage due to cost pressures from inflation, tariffs, or fuel costs, worsening economic health of our service territories, reductions in customer usage patterns, or lower than anticipated load growth, particularly if usage of electricity by data centers is less than currently projected, energy efficiency efforts, natural gas building and appliance electrification, and use of alternative energy sources, such as self-generation and distributed generation technologies; ◦ Federal and state regulations, laws and other efforts designed to promote and expand the use of energy efficiency measures, natural gas electrification, and distributed generation technologies, such as private solar and battery storage, in Duke Energy service territories could result in a reduced number of customers, excess generation resources as well as stranded costs; ◦ Advancements in technology, including artificial intelligence; ◦ Additional competition in electric and natural gas markets, municipalization and continued industry consolidation; ◦ The influence of weather and other natural phenomena on operations, financial position, and cash flows, including the economic, operational and other effects of severe storms, hurricanes, droughts, earthquakes and tornadoes, including extreme weather associated with climate change; ◦ Changing or conflicting investor, customer and other stakeholder expectations and demands, particularly regarding environmental, social and governance matters and costs related thereto; ◦ The ability to successfully operate electric generating facilities and deliver electricity to customers, including direct or indirect effects to the Company resulting from an incident that affects the United States electric grid or generating resources; ◦ Operational interruptions to our natural gas distribution and transmission activities; ◦ The availability of adequate interstate pipeline transportation capacity and natural gas supply; ◦ The impact on facilities and business from a terrorist or other attack, war, vandalism, cybersecurity threats, data security breaches, operational events, information technology failures or other catastrophic events, such as severe storms, fires, explosions, pandemic health events or other similar occurrences; ◦ The inherent risks associated with the operation of nuclear facilities, including environmental, health, safety, regulatory and financial risks, including the financial stability of third-party service providers; 5
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Duke Energy News Release 6 ◦ The timing and extent of changes in commodity prices, including any impact from increased tariffs, export controls and interest rates, and the ability to timely recover such costs through the regulatory process, where appropriate, and their impact on liquidity positions and the value of underlying assets; ◦ The results of financing efforts, including the ability to obtain financing on favorable terms, which can be affected by various factors, including credit ratings, interest rate fluctuations, compliance with debt covenants and conditions, an individual utility’s generation portfolio, and general market and economic conditions; ◦ Credit ratings of the Duke Energy Registrants may be different from what is expected; ◦ Declines in the market prices of equity and fixed-income securities and resultant cash funding requirements for defined benefit pension plans, other post-retirement benefit plans and nuclear decommissioning trust funds; ◦ Construction and development risks associated with the completion of the Duke Energy Registrants’ capital investment projects, including risks related to financing, timing and receipt of necessary regulatory approvals, obtaining and complying with terms of permits, meeting construction budgets and schedules, obtaining sufficient skilled labor and satisfying operating and environmental performance standards, as well as the ability to recover costs from customers in a timely manner, or at all; ◦ Changes in rules for regional transmission organizations, including changes in rate designs and new and evolving capacity markets, and risks related to obligations created by the default of other participants; ◦ The ability to control operation and maintenance costs; ◦ The level of creditworthiness of counterparties to transactions; ◦ The ability to obtain adequate insurance at acceptable costs and recover on claims made; ◦ Employee workforce factors, including the potential inability to attract and retain key personnel; ◦ The ability of subsidiaries to pay dividends or distributions to Duke Energy Corporation holding company (the Parent); ◦ The performance of projects undertaken by our businesses and the success of efforts to invest in and develop new opportunities; ◦ The effect of accounting and reporting pronouncements issued periodically by accounting standard-setting bodies and the SEC; ◦ The impact of United States tax legislation to our financial condition, results of operations or cash flows and our credit ratings; ◦ The impacts from potential impairments of goodwill or investment carrying values; ◦ Asset or business acquisitions and dispositions may not be consummated or yield the anticipated benefits, which could adversely affect our financial condition, credit metrics or ability to execute strategic and capital plans; ◦ The (i) failure to realize the anticipated benefits, synergies and value creation expected from the utility combination by which Duke Energy Progress will merge into Duke Energy Carolinas (the Combination), including as a result of difficulties or delays in integrating the contributed assets and operations and/or the incurring of significant costs in connection with the Combination; and (ii) the risk that the combined entity may not perform as expected following the consummation of the Combination due to unforeseen liabilities, its level of indebtedness, integration challenges, market conditions, ratings downgrades or other factors beyond the control of the parties; and ◦ The actions of activist shareholders could disrupt our operations, impact our ability to execute on our business strategy, or cause fluctuations in the trading price of our common stock. Additional risks and uncertainties are identified and discussed in the Duke Energy Registrants' reports filed with the SEC and available at the SEC's website at sec.gov. In light of these risks, uncertainties and assumptions, the events described in the forward-looking statements might not occur or might occur to a different extent or at a different time than described. Forward- looking statements speak only as of the date they are made and the Duke Energy Registrants expressly disclaim an obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. 6
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DUKE ENERGY CORPORATION REPORTED TO ADJUSTED EARNINGS RECONCILIATION Three Months Ended September 30, 2026 (Dollars in millions, except per share amounts) ReportedEarnings DiscontinuedOperations TotalAdjustments AdjustedEarnings SEGMENT INCOME (LOSS) Electric Utilities and Infrastructure $ 1,817 $ — $ — $ 1,817 Gas Utilities and Infrastructure (19) — — (19) Total Reportable Segment Income 1,798 — — 1,798 Other (247) — — (247) Net Income Available to Duke Energy Corporation Common Stockholders $ 1,551 $ — $ — $ 1,551 EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 1.99 $ — $ — $ 1.99 Note: Total EPS adjustments may not cross-foot due to rounding. Weighted Average Shares, basic (reported and adjusted) – 780 million 7
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DUKE ENERGY CORPORATION REPORTED TO ADJUSTED EARNINGS RECONCILIATION Nine Months Ended September 30, 2026 (Dollars in millions, except per share amounts) Special Items ReportedEarnings Legal andRegulatorySettlements AssetSales DiscontinuedOperations TotalAdjustments AdjustedEarnings SEGMENT INCOME (LOSS) Electric Utilities and Infrastructure $ 4,342 $ 189 A$ — $ — $ 189 $ 4,531 Gas Utilities and Infrastructure 523 — (171) B — (171) 352 Total Reportable Segment Income 4,865 189 (171) — 18 4,883 Other (714) — — — (714) Discontinued Operations 13 — — (13) C (13) — Net Income Available to Duke Energy CorporationCommon Stockholders $ 4,164 $ 189 $ (171) $ (13) $ 5 $ 4,169 EPS AVAILABLE TO DUKE ENERGY CORPORATIONCOMMON STOCKHOLDERS $ 5.34 $ 0.24 $ (0.22) $ (0.02) $ 0.01 $ 5.35 Note: Total EPS adjustments may not cross-foot due to rounding. A – Duke Energy Carolinas and Duke Energy Progress recorded a total of $248 million pretax within Operations, maintenance and other, Impairment of assets and other charges, and Operating Revenues on the Condensed Consolidated Statements of Operations due to certain legal settlements, as well as regulatory settlements related to the Duke Energy Carolinas' and Duke Energy Progress' North Carolina rate cases and establishment of a regulatory liability associated with an energy efficiency program. Segment income amount for these matters is net of a $59 million tax benefit. B – Net of $196 million tax expense, which includes the impact of nondeductible goodwill related to the sale of Piedmont's Tennessee business. • $368 million recorded within Gains on Sales of Other Assets and Other, net, and $7 million recorded within Property and other taxes on the Condensed Consolidated Statements of Operations related to the sale of Piedmont's Tennessee business. • $6 million recorded within Gains on Sales of Other Assets and Other, net on the Condensed Consolidated Statements of Operations related to the sale of certain renewable natural gas investments. C – Recorded in Income (Loss) from Discontinued Operations, net of tax, on the Condensed Consolidated Statements of Operations. Weighted Average Shares, basic (reported and adjusted) – 779 million 8
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DUKE ENERGY CORPORATION REPORTED TO ADJUSTED EARNINGS RECONCILIATION Three Months Ended September 30, 2025 (Dollars in millions, except per share amounts) ReportedEarnings DiscontinuedOperations TotalAdjustments AdjustedEarnings SEGMENT INCOME (LOSS) Electric Utilities and Infrastructure $ 1,658 $ — $ — $ 1,658 Gas Utilities and Infrastructure (26) — — (26) Total Reportable Segment Income 1,632 — — 1,632 Other (225) — — (225) Net Income Available to Duke Energy Corporation Common Stockholders $ 1,407 $ — $ — $ 1,407 EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 1.81 $ — $ — $ 1.81 Note: Total EPS adjustments may not cross-foot due to rounding. Weighted Average Shares, basic (reported and adjusted) – 778 million 9
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DUKE ENERGY CORPORATION REPORTED TO ADJUSTED EARNINGS RECONCILIATION Nine Months Ended September 30, 2025 (Dollars in millions, except per share amounts) ReportedEarnings DiscontinuedOperations TotalAdjustments AdjustedEarnings SEGMENT INCOME (LOSS) Electric Utilities and Infrastructure $ 4,128 $ — $ — $ 4,128 Gas Utilities and Infrastructure 329 — — 329 Total Reportable Segment Income 4,457 — — 4,457 Other (713) — — (713) Discontinued Operations (1) 1 A 1 — Net Income Available to Duke Energy Corporation Common Stockholders $ 3,743 $ 1 $ 1 $ 3,744 EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 4.81 $ — $ — $ 4.81 Note: Total EPS adjustments may not cross-foot due to rounding. A – Recorded in Income (Loss) from Discontinued Operations, net of tax, on the Condensed Consolidated Statements of Operations. Weighted Average Shares, basic (reported and adjusted) – 777 million 10
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DUKE ENERGY CORPORATION EFFECTIVE TAX RECONCILIATION September 2026 (Dollars in millions) Three Months Ended September 30, 2026 Nine Months Ended September 30, 2026 Balance Effective TaxRate Balance Effective TaxRate Reported Income From Continuing Operations Before Income Taxes $ 1,949 $ 5,151 Legal and Regulatory Settlements — 248 Asset Sales — (367) Noncontrolling Interests (100) (196) Preferred Dividends (14) (43) Adjusted Pretax Income $ 1,835 $ 4,793 Reported Income Tax Expense From Continuing Operations $ 299 15.3 % $ 792 15.4 % Legal and Regulatory Settlements — 59 Asset Sales — (196) Noncontrolling Interest Portion of Income Taxes (15) (31) Adjusted Tax Expense $ 284 15.5 % $ 624 13.0 % Three Months Ended September 30, 2025 Nine Months Ended September 30, 2025 Balance Effective TaxRate Balance Effective TaxRate Reported Income From Continuing Operations Before Income Taxes $ 1,630 $ 4,354 Noncontrolling Interests (38) (93) Preferred Dividends (14) (41) Adjusted Pretax Income $ 1,578 $ 4,220 Reported Income Tax Expense From Continuing Operations $ 176 10.8 % $ 488 11.2 % Noncontrolling Interest Portion of Income Taxes (5) (12) Adjusted Tax Expense $ 171 10.8 % $ 476 11.3 % (a) Income tax related to non-pass-through entities for tax purposes. (a) (a) 11
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DUKE ENERGY CORPORATION EARNINGS VARIANCES September 2026 QTD vs. Prior Year (Dollars per share) ElectricUtilities andInfrastructure GasUtilities andInfrastructure Other Consolidated 2025 QTD Reported and Adjusted Earnings Per Share $ 2.13 $ (0.03) $ (0.29) $ 1.81 Weather 0.08 — — 0.08 Volume 0.10 — — 0.10 Riders and Other Retail Margin 0.10 (0.01) — 0.09 Rate case impacts, net 0.16 — — 0.16 Wholesale 0.03 — — 0.03 Operations and maintenance, net of recoverables — 0.01 — 0.01 Interest Expense (0.04) — — (0.04) AFUDC Equity 0.02 — — 0.02 Depreciation and amortization (0.08) — — (0.08) Other (0.17) 0.01 (0.03) (0.19) Total variance $ 0.20 $ 0.01 $ (0.03) $ 0.18 2026 QTD Reported and Adjusted Earnings Per Share $ 2.33 $ (0.02) $ (0.32) $ 1.99 Note: Earnings Per Share amounts are calculated using the consolidated statutory income tax rate for all drivers. Basic weighted average sharesoutstanding increased from 778 million to 780 million. Totals may not foot or cross-foot due to rounding. (a) Includes block and seasonal pricing. (b) Electric Utilities and Infrastructure includes higher grid modernization riders and transmission revenues (+$0.03), North Carolina Power Bill Reduction Act (SB266) impacts (+$0.02), and the DEI Generation Cost Tracker (+$0.01). (c) Electric Utilities and Infrastructure includes impacts from DEP North Carolina Year 3 rates, effective October 2025, and DEP South Carolina rates, effective February 2026 (+$0.05), DEC North Carolina Year 3 rates, effective January 2026, and DEC South Carolina rates, effective March 2026 (+$0.04), DEI Step 2 rates, effective March 2026 (+$0.04) and DEF Year 2 rates, effective January 2026 (+$0.03). (d) Electric Utilities and Infrastructure excludes rate case impacts. (e) Electric Utilities and Infrastructure includes timing of PTCs (-$0.08), minority interest impacts (-$0.07) and higher property taxes (-$0.02). (a) (b) (c) (d) (d) (e) 12
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DUKE ENERGY CORPORATION EARNINGS VARIANCES September 2026 YTD vs. Prior Year (Dollars per share) ElectricUtilities andInfrastructure GasUtilities andInfrastructure Other DiscontinuedOperations Consolidated 2025 YTD Reported and Adjusted Earnings Per Share $ 5.31 $ 0.42 $ (0.92) $ — $ 4.81 Weather 0.09 — — — 0.09 Volume 0.22 — — — 0.22 Riders and Other Retail Margin 0.31 0.01 — — 0.32 Rate case impacts, net 0.39 0.01 — — 0.40 Wholesale 0.08 — — — 0.08 Operations and maintenance, net of recoverables (0.08) — — — (0.08) Interest Expense (0.11) — (0.02) — (0.13) AFUDC Equity 0.07 — — — 0.07 Depreciation and amortization (0.25) (0.01) — — (0.26) Other (0.21) 0.02 0.02 — (0.17) Total variance $ 0.51 $ 0.03 $ — $ — $ 0.54 2026 YTD Adjusted Earnings Per Share $ 5.82 $ 0.45 $ (0.92) $ — $ 5.35 Legal and Regulatory Settlements (0.24) — — — (0.24) Asset Sales — 0.22 — — 0.22 Discontinued Operations — — — 0.02 0.02 2026 YTD Reported Earnings Per Share $ 5.58 $ 0.67 $ (0.92) $ 0.02 $ 5.34 Note: Earnings Per Share amounts are calculated using the consolidated statutory income tax rate for all drivers. Basic weighted average sharesoutstanding increased from 777 million to 779 million. Totals may not foot or cross-foot due to rounding. (a) Includes block and seasonal pricing. (b) Electric Utilities and Infrastructure includes higher grid modernization riders and transmission revenues (+$0.10), SB266 impacts (+$0.09), and the DEI Generation Cost Tracker (+$0.02). Gas Utilities and Infrastructure includes higher capital riders and higher rates in South Carolina, partially offset by lower earnings due to the sale of the Tennessee business. (c) Electric Utilities and Infrastructure includes impacts from DEP North Carolina Year 3 rates, effective October 2025, and DEP South Carolina rates, effective February 2026 (+$0.10), DEI Step 2 rates, effective March 2026 (+$0.10), DEC North Carolina Year 3 rates, effective January 2026, and DEC South Carolina rates, effective March 2026 (+$0.09), DEF Year 2 rates, effective January 2026 (+$0.08), and DEK rates, effective July 2025 (+$0.02). Gas Utilities and Infrastructure includes impacts from DEK rates, effective January 2026. (d) Electric Utilities and Infrastructure includes higher storm costs (-$0.03) and increased bad debt expense (-$0.02) in the current year. (e) Electric Utilities and Infrastructure excludes rate case impacts. (f) Electric Utilities and Infrastructure includes minority interest impacts (-$0.12) and higher property taxes (-$0.06). (a) (b) (c) (d) (e) (e) (f) 13
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DUKE ENERGY CORPORATION CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (In millions, except per share amounts) Three Months Ended Nine Months Ended September 30, September 30, 2026 2025 2026 2025 Operating Revenues Regulated electric $ 8,677 $ 8,106 $ 23,583 $ 22,138 Regulated natural gas 358 361 2,073 1,928 Nonregulated electric and other 69 75 218 233 Total operating revenues 9,104 8,542 25,874 24,299 Operating Expenses Fuel used in electric generation and purchased power 2,738 2,289 7,072 6,266 Cost of natural gas 117 110 772 642 Operation, maintenance and other 1,373 1,762 4,510 4,916 Depreciation and amortization 1,709 1,626 5,098 4,721 Property and other taxes 433 438 1,259 1,281 Impairment of assets and other charges (2) — 47 3 Total operating expenses 6,368 6,225 18,758 17,829 Gains (Losses) on Sales of Other Assets and Other, net 11 17 405 37 Operating Income 2,747 2,334 7,521 6,507 Other Income and Expenses Equity in earnings (losses) of unconsolidated affiliates 22 16 39 38 Other income and expenses, net 147 182 483 497 Total other income and expenses 169 198 522 535 Interest Expense 967 902 2,892 2,688 Income From Continuing Operations Before Income Taxes 1,949 1,630 5,151 4,354 Income Tax Expense From Continuing Operations 299 176 792 488 Income From Continuing Operations 1,650 1,454 4,359 3,866 Income (Loss) From Discontinued Operations, net of tax — — 13 (1) Net Income 1,650 1,454 4,372 3,865 Less: Net Income Attributable to NCI 85 33 165 81 Net Income Attributable to Duke Energy Corporation 1,565 1,421 4,207 3,784 Less: Preferred Dividends 14 14 43 41 Net Income Available to Duke Energy Corporation Common Stockholders $ 1,551 $ 1,407 $ 4,164 $ 3,743 Earnings Per Share – Basic and Diluted Income from continuing operations available to Duke Energy Corporation commonstockholders Basic and Diluted $ 1.99 $ 1.81 $ 5.32 $ 4.81 Income (loss) from discontinued operations attributable to Duke Energy Corporationcommon stockholders Basic and Diluted $ — $ — $ 0.02 $ — Net income available to Duke Energy Corporation common stockholders Basic and Diluted $ 1.99 $ 1.81 $ 5.34 $ 4.81 Weighted average shares outstanding Basic and Diluted 780 778 779 777 14
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DUKE ENERGY CORPORATION CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (In millions) September 30, 2026 December 31, 2025 ASSETS Current Assets Cash and cash equivalents $ 451 $ 245 Receivables (net of allowance for doubtful accounts of $213 at 2026 and $194 at 2025) 4,994 4,230 Inventory (includes $1,137 at 2026 and $669 at 2025 related to VIEs) 4,734 4,569 Regulatory assets (includes $205 at 2026 and $204 at 2025 related to VIEs) 2,563 1,934 Assets held for sale — 109 Other (includes $86 at 2026 and $88 at 2025 related to VIEs) 644 526 Total current assets 13,386 11,613 Property, Plant and Equipment Cost (includes $6,188 at 2026 and $2,913 at 2025 related to VIEs) 200,880 190,409 Accumulated depreciation and amortization (includes ($164) at 2026 and ($89) at 2025 related to VIEs) (63,127) (60,450) Net property, plant and equipment 137,753 129,959 Other Noncurrent Assets Goodwill 19,010 19,010 Regulatory assets (includes $2,970 at 2026 and $3,108 at 2025 related to VIEs) 14,355 14,379 Nuclear decommissioning trust funds 13,281 12,889 Operating lease right-of-use assets, net 1,189 1,241 Investments in equity method unconsolidated affiliates 350 330 Assets held for sale — $ 2,148 Other 4,539 4,167 Total other noncurrent assets 52,724 54,164 Total Assets $ 203,863 $ 195,736 LIABILITIES AND EQUITY Current Liabilities Accounts payable (includes $374 at 2026 and $296 at 2025 related to VIEs) $ 5,018 $ 5,223 Notes payable and commercial paper 2,341 2,624 Taxes accrued 1,160 975 Interest accrued 842 922 Current maturities of long-term debt (includes $167 at 2026 and $118 at 2025 related to VIEs) 6,116 7,104 Asset retirement obligations 462 579 Regulatory liabilities 1,365 1,271 Liabilities associated with assets held for sale — 84 Other 2,341 2,265 Total current liabilities 19,645 21,047 Long-Term Debt (includes $3,136 at 2026 and $3,308 at 2025 related to VIEs) 84,332 80,108 Other Noncurrent Liabilities Deferred income taxes 13,740 12,377 Asset retirement obligations 8,870 9,046 Regulatory liabilities 15,410 15,682 Operating lease liabilities 991 1,033 Accrued pension and other post-retirement benefit costs 340 396 Investment tax credits 1,019 969 Liabilities associated with assets held for sale — $ 170 Other 1,974 1,889 Total other noncurrent liabilities 42,344 41,562 Commitments and Contingencies Equity Preferred stock, Series A, $0.001 par value, 40 million depositary shares authorized and outstanding at2026 and 2025 973 973 Common stock, $0.001 par value, 2 billion shares authorized; 780 million and 778 million sharesoutstanding at 2026 and 2025 1 1 Additional paid-in capital 47,397 45,614 Retained earnings 6,708 5,056 Accumulated other comprehensive income (loss) 298 198 Total Duke Energy Corporation stockholders' equity 55,377 51,842 Noncontrolling Interests 2,165 1,177 Total equity 57,542 53,019 Total Liabilities and Equity $ 203,863 $ 195,736 15
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DUKE ENERGY CORPORATION CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (In millions) Nine Months Ended September 30, 2026 2025 CASH FLOWS FROM OPERATING ACTIVITIES Net Income $ 4,372 $ 3,865 Adjustments to reconcile net income to net cash provided by operating activities 3,517 4,807 Net cash provided by operating activities 7,889 8,672 CASH FLOWS FROM INVESTING ACTIVITIES Net cash used in investing activities (10,824) (9,976) CASH FLOWS FROM FINANCING ACTIVITIES Net cash provided by financing activities 3,130 1,622 Net increase (decrease) in cash, cash equivalents and restricted cash 195 318 Cash, cash equivalents and restricted cash at beginning of period 363 421 Cash, cash equivalents and restricted cash at end of period $ 558 $ 739 16
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DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited) Three Months Ended September 30, 2026 (In millions) ElectricUtilities andInfrastructure GasUtilities andInfrastructure OtherEliminations/Adjustments DukeEnergy Operating Revenues Regulated electric $ 8,691 $ — $ — $ (14) $ 8,677 Regulated natural gas — 380 — (22) 358 Nonregulated electric and other 56 10 41 (38) 69 Total operating revenues 8,747 390 41 (74) 9,104 Operating Expenses Fuel used in electric generation and purchased power 2,756 — — (18) 2,738 Cost of natural gas — 117 — — 117 Operation, maintenance and other 1,349 114 (35) (55) 1,373 Depreciation and amortization 1,520 107 88 (6) 1,709 Property and other taxes 396 35 2 — 433 Impairment of assets and other charges (2) — — — (2) Total operating expenses 6,019 373 55 (79) 6,368 Gains (Losses) on Sales of Other Assets and Other, net 6 — 6 (1) 11 Operating Income (Loss) 2,734 17 (8) 4 2,747 Other Income and Expenses Equity in earnings (losses) of unconsolidated affiliates — 7 15 — 22 Other income and expenses, net 154 12 2 (21) 147 Total Other Income and Expenses 154 19 17 (21) 169 Interest Expense 592 63 329 (17) 967 Income (Loss) from Continuing Operations before Income Taxes 2,296 (27) (320) — 1,949 Income Tax Expense (Benefit) from Continuing Operations 394 (8) (87) — 299 Income (Loss) from Continuing Operations 1,902 (19) (233) — 1,650 Less: Net Income Attributable to Noncontrolling Interest 85 — — — 85 Net Income (Loss) Attributable to Duke Energy Corporation 1,817 (19) (233) — 1,565 Less: Preferred Dividends — — 14 — 14 Segment Income/Other Net Loss $ 1,817 $ (19) $ (247) $ — $ 1,551 17
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DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited) Nine Months Ended September 30, 2026 (In millions) ElectricUtilities andInfrastructure GasUtilities andInfrastructure OtherEliminations/Adjustments DukeEnergy Operating Revenues Regulated electric $ 23,626 $ — $ — $ (43) $ 23,583 Regulated natural gas — 2,139 — (66) 2,073 Nonregulated electric and other 174 33 123 (112) 218 Total operating revenues 23,800 2,172 123 (221) 25,874 Operating Expenses Fuel used in electric generation and purchased power 7,129 — — (57) 7,072 Cost of natural gas — 772 — — 772 Operation, maintenance and other 4,397 376 (105) (158) 4,510 Depreciation and amortization 4,532 332 254 (20) 5,098 Property and other taxes 1,132 120 7 — 1,259 Impairment of assets and other charges 47 — — — 47 Total operating expenses 17,237 1,600 156 (235) 18,758 Gains (Losses) on Sales of Other Assets and Other, net 13 374 18 — 405 Operating Income (Loss) 6,576 946 (15) 14 7,521 Other Income and Expenses Equity in earnings (losses) of unconsolidated affiliates — 17 22 — 39 Other income and expenses, net 446 40 66 (69) 483 Total Other Income and Expenses 446 57 88 (69) 522 Interest Expense 1,765 191 991 (55) 2,892 Income (Loss) from Continuing Operations before Income Taxes 5,257 812 (918) — 5,151 Income Tax Expense (Benefit) from Continuing Operations 750 289 (247) — 792 Income (Loss) from Continuing Operations 4,507 523 (671) — 4,359 Less: Net Income Attributable to Noncontrolling Interest 165 — — — 165 Net Income (Loss) Attributable to Duke Energy Corporation 4,342 523 (671) — 4,194 Less: Preferred Dividends — — 43 — 43 Segment Income/Other Net Loss $ 4,342 $ 523 $ (714) $ — $ 4,151 Discontinued Operations 13 Net Income Available to Duke Energy Corporation CommonStockholders $ 4,164 Segment Income/Other Net Loss $ 4,342 $ 523 $ (714) $ — $ 4,151 Special Items 189 (171) — — 18 Adjusted Earnings $ 4,531 $ 352 $ (714) $ — $ 4,169 (a) See Reported to Adjusted Earnings Reconciliation for a detailed reconciliation of Segment Income/Other Net Loss to Adjusted Earnings. (a) 18
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DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited) Three Months Ended September 30, 2025 (In millions) ElectricUtilities andInfrastructure GasUtilities andInfrastructure OtherEliminations/Adjustments DukeEnergy Operating Revenues Regulated electric $ 8,122 $ — $ — $ (16) $ 8,106 Regulated natural gas — 384 — (23) 361 Nonregulated electric and other 58 10 40 (33) 75 Total operating revenues 8,180 394 40 (72) 8,542 Operating Expenses Fuel used in electric generation and purchased power 2,309 — — (20) 2,289 Cost of natural gas — 110 — — 110 Operation, maintenance and other 1,728 125 (38) (53) 1,762 Depreciation and amortization 1,448 106 79 (7) 1,626 Property and other taxes 394 41 2 1 438 Impairment of assets and other charges (1) — — 1 — Total operating expenses 5,878 382 43 (78) 6,225 Gains (Losses) on Sales of Other Assets and Other, net 12 — 5 — 17 Operating Income (Loss) 2,314 12 2 6 2,334 Other Income and Expenses Equity in earnings (losses) of unconsolidated affiliates — 5 12 (1) 16 Other income and expenses, net 164 14 28 (24) 182 Total Other Income and Expenses 164 19 40 (25) 198 Interest Expense 522 67 332 (19) 902 Income (Loss) from Continuing Operations before Income Taxes 1,956 (36) (290) — 1,630 Income Tax Expense (Benefit) from Continuing Operations 264 (10) (79) 1 176 Income (Loss) from Continuing Operations 1,692 (26) (211) (1) 1,454 Less: Net Income Attributable to Noncontrolling Interest 34 — — (1) 33 Net Income (Loss) Attributable to Duke Energy Corporation 1,658 (26) (211) — 1,421 Less: Preferred Dividends — — 14 — 14 Segment Income/Other Net Loss $ 1,658 $ (26) $ (225) $ — $ 1,407 19
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DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited) Nine Months Ended September 30, 2025 (In millions) ElectricUtilities andInfrastructure GasUtilities andInfrastructure OtherEliminations/Adjustments DukeEnergy Operating Revenues Regulated electric $ 22,183 $ — $ — $ (45) $ 22,138 Regulated natural gas — 1,996 — (68) 1,928 Nonregulated electric and other 182 31 122 (102) 233 Total operating revenues 22,365 2,027 122 (215) 24,299 Operating Expenses Fuel used in electric generation and purchased power 6,326 — — (60) 6,266 Cost of natural gas — 642 — — 642 Operation, maintenance and other 4,746 379 (59) (150) 4,916 Depreciation and amortization 4,184 325 233 (21) 4,721 Property and other taxes 1,143 129 8 1 1,281 Impairment of assets and other charges (2) — 5 — 3 Total operating expenses 16,397 1,475 187 (230) 17,829 Gains (Losses) on Sales of Other Assets and Other, net 21 — 16 — 37 Operating Income (Loss) 5,989 552 (49) 15 6,507 Other Income and Expenses Equity in earnings (losses) of unconsolidated affiliates — 11 27 — 38 Other income and expenses, net 461 40 75 (79) 497 Total Other Income and Expenses 461 51 102 (79) 535 Interest Expense 1,587 197 968 (64) 2,688 Income (Loss) From Continuing Operations Before Income Taxes 4,863 406 (915) — 4,354 Income Tax Expense (Benefit) from Continuing Operations 653 77 (243) 1 488 Income (Loss) from Continuing Operations 4,210 329 (672) (1) 3,866 Less: Net Income Attributable to Noncontrolling Interest 82 — — (1) 81 Net Income (Loss) Attributable to Duke Energy Corporation 4,128 329 (672) — 3,785 Less: Preferred Dividends — — 41 — 41 Less: Preferred Redemption Costs — — — — — Segment Income/Other Net Loss $ 4,128 $ 329 $ (713) $ — $ 3,744 Discontinued Operations (1) Net Income Available to Duke Energy Corporation CommonStockholders $ 3,743 20
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DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS (Unaudited) September 30, 2026 (In millions) ElectricUtilities andInfrastructure GasUtilities andInfrastructure Other Eliminations/Adjustments DukeEnergy Current Assets Cash and cash equivalents $ 105 $ 9 $ 337 $ — $ 451 Receivables, net 4,771 217 6 — 4,994 Receivables from affiliated companies 208 108 1,261 (1,577) — Notes receivable from affiliated companies 929 — 85 (1,014) — Inventory 4,577 122 35 — 4,734 Regulatory assets 2,326 152 85 — 2,563 Other 512 42 127 (37) 644 Total current assets 13,428 650 1,936 (2,628) 13,386 Property, Plant and Equipment Cost 181,215 17,235 2,498 (68) 200,880 Accumulated depreciation and amortization (58,539) (3,562) (1,025) (1) (63,127) Net property, plant and equipment 122,676 13,673 1,473 (69) 137,753 Other Noncurrent Assets Goodwill 17,380 1,630 — — 19,010 Regulatory assets 13,234 665 455 1 14,355 Nuclear decommissioning trust funds 13,281 — — — 13,281 Operating lease right-of-use assets, net 639 1 549 — 1,189 Investments in equity method unconsolidated affiliates 1 184 165 — 350 Investment in consolidated subsidiaries 598 6 82,675 (83,279) — Other 2,846 340 1,978 (625) 4,539 Total other noncurrent assets 47,979 2,826 85,822 (83,903) 52,724 Total Assets 184,083 17,149 89,231 (86,600) 203,863 Segment reclassifications, intercompany balances and other (1,838) (116) (84,646) 86,600 — Segment Assets $ 182,245 $ 17,033 $ 4,585 $ — $ 203,863 21
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DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY (Unaudited) September 30, 2026 (In millions) ElectricUtilities andInfrastructure GasUtilities andInfrastructure Other Eliminations/Adjustments DukeEnergy Current Liabilities Accounts payable $ 3,825 $ 306 $ 887 $ — $ 5,018 Accounts payable to affiliated companies 825 47 549 (1,421) — Notes payable to affiliated companies 47 542 426 (1,015) — Notes payable and commercial paper — — 2,341 — 2,341 Taxes accrued 1,111 69 (31) 11 1,160 Interest accrued 563 58 221 — 842 Current maturities of long-term debt 3,984 376 1,764 (8) 6,116 Asset retirement obligations 462 — — — 462 Regulatory liabilities 1,294 71 — — 1,365 Other 1,743 82 712 (196) 2,341 Total current liabilities 13,854 1,551 6,869 (2,629) 19,645 Long-Term Debt 53,928 4,395 26,069 (60) 84,332 Long-Term Debt Payable to Affiliated Companies 618 7 — (625) — Other Noncurrent Liabilities Deferred income taxes 13,820 1,445 (1,521) (4) 13,740 Asset retirement obligations 8,775 95 — — 8,870 Regulatory liabilities 14,365 1,018 27 — 15,410 Operating lease liabilities 585 1 405 — 991 Accrued pension and other post-retirement benefit costs (67) 29 379 (1) 340 Investment tax credits 1,018 — — 1 1,019 Other 1,363 121 679 (189) 1,974 Total other noncurrent liabilities 39,859 2,709 (31) (193) 42,344 Equity Total Duke Energy Corporation stockholders' equity 73,661 8,485 56,324 (83,093) 55,377 Noncontrolling interests 2,163 2 — — 2,165 Total equity 75,824 8,487 56,324 (83,093) 57,542 Total Liabilities and Equity 184,083 17,149 89,231 (86,600) 203,863 Segment reclassifications, intercompany balances and other (1,838) (116) (84,646) 86,600 — Segment Liabilities and Equity $ 182,245 $ 17,033 $ 4,585 $ — $ 203,863 22
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ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Three Months Ended September 30, 2026 (In millions) DukeEnergyCarolinas DukeEnergyProgress DukeEnergyFlorida DukeEnergyOhio DukeEnergyIndianaEliminations/Other ElectricUtilities andInfrastructure Operating Revenues $ 3,055 $ 2,242 $ 1,867 $ 591 $ 1,108 $ (116) $ 8,747 Operating Expenses Fuel used in electric generation and purchased power 959 844 518 178 380 (123) 2,756 Operation, maintenance and other 497 380 242 106 133 (9) 1,349 Depreciation and amortization 507 361 341 84 224 3 1,520 Property and other taxes 100 53 140 93 10 — 396 Impairment of assets and other charges — (2) — — — — (2) Total operating expenses 2,063 1,636 1,241 461 747 (129) 6,019 Gains (Losses) on Sales of Other Assets and Other, net 3 — 2 2 — (1) 6 Operating Income 995 606 628 132 361 12 2,734 Other Income and Expenses, net 85 42 20 2 9 (4) 154 Interest Expense 217 135 135 35 80 (10) 592 Income Before Income Taxes 863 513 513 99 290 18 2,296 Income Tax Expense 126 100 89 18 38 23 394 Less: Net Income Attributable to Noncontrolling Interest — — — — — 85 85 Segment Income $ 737 $ 413 $ 424 $ 81 $ 252 $ (90) $ 1,817 (a) Includes results of the wholly owned subsidiary, Duke Energy Kentucky. (b) Includes an equity component of allowance for funds used during construction of $51 million for Duke Energy Carolinas, $32 million for Duke Energy Progress, $5 million for Duke Energy Florida, $2 million for Duke Energy Ohio and $7 million for Duke Energy Indiana. (c) Includes a noncontrolling interest in Duke Energy Indiana and Florida Progress. (a) (b) (c) 23
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ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Nine Months Ended September 30, 2026 (In millions) DukeEnergyCarolinas DukeEnergyProgress DukeEnergyFlorida DukeEnergyOhio DukeEnergyIndianaEliminations/Other ElectricUtilities andInfrastructure Operating Revenues $ 8,237 $ 6,343 $ 5,154 $ 1,661 $ 2,935 $ (530) $ 23,800 Operating Expenses Fuel used in electric generation and purchased power 2,522 2,254 1,413 496 1,000 (556) 7,129 Operation, maintenance and other 1,549 1,237 792 299 507 13 4,397 Depreciation and amortization 1,564 1,143 943 240 631 11 4,532 Property and other taxes 297 134 390 263 48 — 1,132 Impairment of assets and other charges 27 20 — — — — 47 Total operating expenses 5,959 4,788 3,538 1,298 2,186 (532) 17,237 Gains (Losses) on Sales of Other Assets and Other, net 5 1 5 2 — — 13 Operating Income 2,283 1,556 1,621 365 749 2 6,576 Other Income and Expenses, net 220 139 53 10 33 (9) 446 Interest Expense 667 414 389 102 219 (26) 1,765 Income Before Income Taxes 1,836 1,281 1,285 273 563 19 5,257 Income Tax Expense 176 196 245 49 77 7 750 Less: Net Income Attributable to Noncontrolling Interest — — — — — 165 165 Segment Income $ 1,660 $ 1,085 $ 1,040 $ 224 $ 486 $ (153) $ 4,342 (a) Includes results of the wholly owned subsidiary, Duke Energy Kentucky. (b) Includes an equity component of allowance for funds used during construction of $136 million for Duke Energy Carolinas, $90 million for Duke Energy Progress, $11 million for Duke Energy Florida, $9 million for Duke Energy Ohio and $23 million for Duke Energy Indiana. (c) Includes a noncontrolling interest in Duke Energy Indiana and Florida Progress. (a) (b) (c) 24
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ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS (Unaudited) September 30, 2026 (In millions) DukeEnergyCarolinas DukeEnergyProgress DukeEnergyFlorida DukeEnergyOhio DukeEnergyIndiana Eliminations/Adjustments ElectricUtilities andInfrastructure Current Assets Cash and cash equivalents $ 22 $ 37 $ 21 $ 9 $ 16 $ — $ 105 Receivables, net 1,807 1,179 735 399 512 139 4,771 Receivables from affiliated companies 241 43 67 44 31 (218) 208 Notes receivable from affiliated companies 1,068 478 — — — (617) 929 Inventory 1,510 1,341 942 172 613 (1) 4,577 Regulatory assets 1,174 742 171 25 217 (3) 2,326 Other 78 150 107 24 157 (4) 512 Total current assets 5,900 3,970 2,043 673 1,546 (704) 13,428 Property, Plant and Equipment Cost 66,232 47,641 35,066 9,821 22,387 68 181,215 Accumulated depreciation and amortization (21,353) (17,757) (9,074) (2,599) (7,827) 71 (58,539) Net property, plant and equipment 44,879 29,884 25,992 7,222 14,560 139 122,676 Other Noncurrent Assets Goodwill — — — 596 — 16,784 17,380 Regulatory assets 4,722 4,324 2,137 383 901 767 13,234 Nuclear decommissioning trust funds 7,598 5,413 271 — — (1) 13,281 Operating lease right-of-use assets, net 80 345 181 4 28 1 639 Investments in equity method unconsolidated affiliates — — 1 — — — 1 Investment in consolidated subsidiaries 55 10 3 529 1 — 598 Other 1,630 765 674 96 286 (605) 2,846 Total other noncurrent assets 14,085 10,857 3,267 1,608 1,216 16,946 47,979 Total Assets 64,864 44,711 31,302 9,503 17,322 16,381 184,083 Segment reclassifications, intercompany balances and other (1,376) (606) (81) (574) (36) 835 (1,838) Reportable Segment Assets $ 63,488 $ 44,105 $31,221 $ 8,929 $17,286 $ 17,216 $ 182,245 (a) Includes balances of the wholly owned subsidiary Duke Energy Kentucky. (b) Includes the elimination of intercompany balances, purchase accounting adjustments, and Duke Energy Indiana Holdco, LLC balances. (a) (b) 25
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ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY (Unaudited) September 30, 2026 (In millions) DukeEnergyCarolinas DukeEnergyProgress DukeEnergyFlorida DukeEnergyOhio DukeEnergyIndiana Eliminations/Adjustments ElectricUtilities andInfrastructure Current Liabilities Accounts payable $ 1,497 $ 929 $ 623 $ 305 $ 467 $ 4 $ 3,825 Accounts payable to affiliated companies 349 383 112 16 115 (150) 825 Notes payable to affiliated companies — — 523 78 62 (616) 47 Taxes accrued 335 170 224 312 73 (3) 1,111 Interest accrued 201 91 143 45 83 — 563 Current maturities of long-term debt 1,666 902 1,357 42 27 (10) 3,984 Asset retirement obligations 188 159 1 6 108 — 462 Regulatory liabilities 612 346 89 69 178 — 1,294 Other 683 476 358 107 120 (1) 1,743 Total current liabilities 5,531 3,456 3,430 980 1,233 (776) 13,854 Long-Term Debt 20,214 14,064 10,207 3,532 5,531 380 53,928 Long-Term Debt Payable to Affiliated Companies 300 150 — 18 150 — 618 Other Noncurrent Liabilities Deferred income taxes 4,770 3,084 3,338 917 1,649 62 13,820 Asset retirement obligations 3,478 3,974 162 88 874 199 8,775 Regulatory liabilities 8,039 4,170 876 228 1,079 (27) 14,365 Operating lease liabilities 72 344 142 4 24 (1) 585 Accrued pension and other post-retirement benefit costs 8 130 81 66 79 (431) (67) Investment tax credits 360 226 248 5 178 1 1,018 Other 721 435 147 59 31 (30) 1,363 Total other noncurrent liabilities 17,448 12,363 4,994 1,367 3,914 (227) 39,859 Equity Total Duke Energy Corporation stockholders equity 21,371 14,678 12,671 3,606 6,494 14,841 73,661 Noncontrolling interests — — — — — 2,163 2,163 Total equity 21,371 14,678 12,671 3,606 6,494 17,004 75,824 Total Liabilities and Equity 64,864 44,711 31,302 9,503 17,322 16,381 184,083 Segment reclassifications, intercompany balances and other (1,376) (606) (81) (574) (36) 835 (1,838) Reportable Segment Liabilities and Equity $ 63,488 $ 44,105 $31,221 $ 8,929 $17,286 $ 17,216 $ 182,245 (a) Includes balances of the wholly owned subsidiary Duke Energy Kentucky. (b) Includes the elimination of intercompany balances, purchase accounting adjustments and Duke Energy Indiana Holdco, LLC balances. (c) Includes a noncontrolling interest in Duke Energy Indiana and Florida Progress. (a) (b) (c) 26
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GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Three Months Ended September 30, 2026 (In millions) DukeEnergyOhio PiedmontNatural GasLDC MidstreamPipelinesandStorage Eliminations/Adjustments GasUtilities andInfrastructure Operating Revenues $ 127 $ 259 $ 4 $ — $ 390 Operating Expenses Cost of natural gas 15 102 — — 117 Operation, maintenance and other 31 80 2 1 114 Depreciation and amortization 36 69 1 1 107 Property and other taxes 23 13 — (1) 35 Total operating expenses 105 264 3 1 373 Gains (Losses) on Sales of Other Assets and Other, net — — (1) 1 — Operating Income (Loss) 22 (5) — — 17 Other Income and Expenses Equity in earnings (losses) of unconsolidated affiliates — — 7 — 7 Other income and expenses, net 1 10 — 1 12 Total other income and expenses 1 10 7 1 19 Interest Expense 20 44 — (1) 63 Income (Loss) Before Income Taxes 3 (39) 7 2 (27) Income Tax Expense (Benefit) (1) (11) 2 2 (8) Segment Income (Loss) $ 4 $ (28) $ 5 $ — $ (19) (a) Includes results of the wholly owned subsidiary Duke Energy Kentucky. (b) Primarily earnings from investments in Sabal Trail and Cardinal pipelines, as well as Hardy and Pine Needle storage facilities. (a) (b) 27
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GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Nine Months Ended September 30, 2026 (In millions) DukeEnergyOhio PiedmontNatural GasLDC MidstreamPipelines andStorage Eliminations/Adjustments GasUtilities andInfrastructure Operating Revenues $ 601 $ 1,558 $ 13 $ — $ 2,172 Operating Expenses Cost of natural gas 169 603 — — 772 Operation, maintenance and other 107 260 8 1 376 Depreciation and amortization 115 212 4 1 332 Property and other taxes 78 43 — (1) 120 Total operating expenses 469 1,118 12 1 1,600 Gains (Losses) on Sales of Other Assets and Other, net — 652 5 (283) 374 Operating Income (Loss) 132 1,092 6 (284) 946 Other Income and Expenses, net Equity in earnings (losses) of unconsolidated affiliates — — 17 — 17 Other income and expenses, net 4 35 — 1 40 Other Income and Expenses, net 4 35 17 1 57 Interest Expense 57 133 2 (1) 191 Income (Loss) Before Income Taxes 79 994 21 (282) 812 Income Tax Expense (Benefit) 16 248 23 2 289 Segment Income (Loss) $ 63 $ 746 $ (2) $ (284) $ 523 (a) Includes results of the wholly owned subsidiary Duke Energy Kentucky. (b) Includes earnings from investments in Sabal Trail and Cardinal pipelines, as well as Hardy and Pine Needle storage facilities. (c) The gain on sale is $284 million lower at the Gas Utilities and Infrastructure segment level due to higher allocated goodwill related to the Piedmont Tennessee Disposal Group than at Piedmont Natural Gas LDC. (a) (b) (c) 28
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GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS (Unaudited) September 30, 2026 (In millions) DukeEnergyOhio PiedmontNatural GasLDC MidstreamPipelinesand Storage Eliminations/Adjustments GasUtilities andInfrastructure Current Assets Cash and cash equivalents $ 4 $ 1 $ 4 $ — $ 9 Receivables, net 58 160 — (1) 217 Receivables from affiliated companies — 128 72 (92) 108 Inventory 70 52 — — 122 Regulatory assets 78 74 — — 152 Other — 37 4 1 42 Total current assets 210 452 80 (92) 650 Property, Plant and Equipment Cost 5,293 11,867 75 — 17,235 Accumulated depreciation and amortization (1,318) (2,227) (17) — (3,562) Net property, plant and equipment 3,975 9,640 58 — 13,673 Other Noncurrent Assets Goodwill 324 39 — 1,267 1,630 Regulatory assets 326 290 — 49 665 Operating lease right-of-use assets, net — 1 — — 1 Investments in equity method unconsolidated affiliates — — 179 5 184 Investment in consolidated subsidiaries — — — 6 6 Other 30 293 16 1 340 Total other noncurrent assets 680 623 195 1,328 2,826 Total Assets 4,865 10,715 333 1,236 17,149 Segment reclassifications, intercompany balances and other — (129) (102) 115 (116) Reportable Segment Assets $ 4,865 $ 10,586 $ 231 $ 1,351 $ 17,033 (a) Includes balances of the wholly owned subsidiary Duke Energy Kentucky. (b) Includes the elimination of intercompany balances and purchase accounting adjustments. (a) (b) 29
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GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY (Unaudited) September 30, 2026 (In millions) DukeEnergyOhio PiedmontNatural GasLDC MidstreamPipelinesand Storage Eliminations/Adjustments GasUtilities andInfrastructure Current Liabilities Accounts payable $ 66 $ 230 $ 9 $ 1 $ 306 Accounts payable to affiliated companies 3 124 11 (91) 47 Notes payable to affiliated companies 44 498 — — 542 Taxes accrued 5 59 5 — 69 Interest accrued 11 48 — (1) 58 Current maturities of long-term debt 35 340 — 1 376 Regulatory liabilities 20 51 — — 71 Other 6 75 2 (1) 82 Total current liabilities 190 1,425 27 (91) 1,551 Long-Term Debt 843 3,462 52 38 4,395 Long-Term Debt Payable to Affiliated Companies 7 — — — 7 Other Noncurrent Liabilities Deferred income taxes 501 892 50 2 1,445 Asset retirement obligations 69 26 — — 95 Regulatory liabilities 223 784 — 11 1,018 Operating lease liabilities — 1 — — 1 Accrued pension and other post-retirement benefit costs 23 6 — — 29 Investment tax credits — — — — — Other 46 74 — 1 121 Total other noncurrent liabilities 862 1,783 50 14 2,709 Equity Total Duke Energy Corporation stockholders' equity 2,963 4,045 202 1,275 8,485 Noncontrolling interests — — 2 — 2 Total equity 2,963 4,045 204 1,275 8,487 Total Liabilities and Equity 4,865 10,715 333 1,236 17,149 Segment reclassifications, intercompany balances and other — (129) (102) 115 (116) Reportable Segment Liabilities and Equity $ 4,865 $ 10,586 $ 231 $ 1,351 $ 17,033 (a) Includes balances of the wholly owned subsidiary Duke Energy Kentucky. (b) Includes the elimination of intercompany balances and purchase accounting adjustments. (a) (b) 30
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Electric Utilities and Infrastructure Quarterly Highlights September 2026 Three Months Ended September 30, Nine Months Ended September 30, 2026 2025 % Inc. (Dec.) % Inc. (Dec.)Weather Normal 2026 2025 % Inc. (Dec.) % Inc. (Dec.)Weather Normal Gigawatt-hour (GWh) Sales Residential 28,694 26,800 7.1% 2.7% 73,748 71,353 3.4% 1.3% Commercial 24,273 23,375 3.8% 2.3% 62,869 61,544 2.2% 1.8% Industrial 12,508 12,297 1.7% 0.1% 34,680 35,012 (0.9%) (0.9%) Other Energy Sales 122 95 28.4% n/a 376 349 7.7% n/a Unbilled Sales (1,486) (1,603) 7.3% n/a (464) (608) 23.7% n/a Total Retail Sales 64,111 60,964 5.2% 2.0% 171,209 167,650 2.1% 1.0% Wholesale and Other 13,036 11,916 9.4% 35,834 34,633 3.5% Total Consolidated Electric Sales – ElectricUtilities and Infrastructure 77,147 72,880 5.9% 207,043 202,283 2.4% Average Number of Customers (Electric) Residential 7,671,614 7,549,514 1.6% 7,642,163 7,522,577 1.6% Commercial 1,053,870 1,048,926 0.5% 1,052,155 1,047,251 0.5% Industrial 14,731 15,001 (1.8%) 14,777 15,144 (2.4%) Other Energy Sales 22,443 22,923 (2.1%) 22,605 23,060 (2.0%) Total Retail Customers 8,762,658 8,636,364 1.5% 8,731,700 8,608,032 1.4% Wholesale and Other 51 53 (3.8%) 53 53 —% Total Average Number of Customers –Electric Utilities and Infrastructure 8,762,709 8,636,417 1.5% 8,731,753 8,608,085 1.4% Sources of Electric Energy (GWh) Generated – Net Output Coal 12,780 10,833 18.0% 33,730 29,965 12.6% Nuclear 18,863 19,593 (3.7%) 55,328 57,769 (4.2%) Hydro 131 300 (56.3%) 505 1,198 (57.8%) Natural Gas and Oil 29,696 28,056 5.8% 74,498 71,981 3.5% Renewable Energy 1,312 1,119 17.2% 3,607 3,131 15.2% Total Generation 62,782 59,901 4.8% 167,668 164,044 2.2% Purchased Power and Net Interchange 18,049 16,580 8.9% 49,115 47,746 2.9% Total Sources of Energy 80,831 76,481 5.7% 216,783 211,790 2.4% Less: Line Loss and Other 3,684 3,601 2.3% 9,740 9,507 2.5% Total GWh Sources 77,147 72,880 5.9% 207,043 202,283 2.4% Owned Megawatt (MW) Capacity Summer 52,169 50,692 Winter 55,944 55,270 Nuclear Capacity Factor (%) 94 98 (a) Except as indicated in footnote (b), represents non-weather-normalized billed sales, with energy delivered but not yet billed (i.e., unbilled sales) reflected as a single amount and not allocated to the respective retail classes. (b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales). (c) Statistics reflect Duke Energy's ownership share of jointly owned stations. (d) Generation by source is reported net of auxiliary power. (e) Purchased power includes renewable energy purchases. (f) Based on winter capacity for Fossil, Nuclear and Hydro generation stations, and nameplate capacity for Renewable generation stations. (g) Statistics reflect 100% of jointly owned stations. (b) (b) (a) (c) (d) (e) (c)(f) (g) 31
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Duke Energy Carolinas Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information September 2026 Three Months Ended September 30, Nine Months Ended September 30, 2026 2025 %Inc. (Dec.) % Inc. (Dec.) WeatherNormal 2026 2025 %Inc. (Dec.) % Inc. (Dec.) WeatherNormal GWh Sales Residential 9,691 8,804 10.1% 25,173 24,107 4.4% Commercial 9,242 8,745 5.7% 24,014 23,400 2.6% Industrial 5,349 5,317 0.6% 14,745 14,848 (0.7%) Other Energy Sales 65 61 6.6% 199 194 2.6% Unbilled Sales (625) (669) 6.6% (305) (319) 4.4% Total Retail Sales 23,722 22,258 6.6% 2.3% 63,826 62,230 2.6% 1.1% Wholesale and Other 3,552 3,058 16.2% 9,436 8,812 7.1% Total Consolidated Electric Sales – DukeEnergy Carolinas 27,274 25,316 7.7% 73,262 71,042 3.1% Average Number of Customers Residential 2,599,296 2,548,828 2.0% 2,587,247 2,536,524 2.0% Commercial 403,228 403,029 —% 403,030 402,595 0.1% Industrial 5,712 5,801 (1.5%) 5,734 5,847 (1.9%) Other Energy Sales 10,625 10,755 (1.2%) 10,666 10,798 (1.2%) Total Retail Customers 3,018,861 2,968,413 1.7% 3,006,677 2,955,764 1.7% Wholesale and Other 27 27 —% 27 27 —% Total Average Number of Customers – Duke Energy Carolinas 3,018,888 2,968,440 1.7% 3,006,704 2,955,791 1.7% Sources of Electric Energy (GWh) Generated – Net Output Coal 3,026 2,649 14.2% 8,570 7,472 14.7% Nuclear 11,021 11,688 (5.7%) 32,902 34,840 (5.6%) Hydro (41) 126 (132.5%) 30 593 (94.9%) Natural Gas and Oil 9,809 8,945 9.7% 23,030 21,415 7.5% Renewable Energy 93 83 12.0% 232 227 2.2% Total Generation 23,908 23,491 1.8% 64,764 64,547 0.3% Purchased Power and Net Interchange 4,540 2,852 59.2% 11,810 9,522 24.0% Total Sources of Energy 28,448 26,343 8.0% 76,574 74,069 3.4% Less: Line Loss and Other 1,174 1,027 14.3% 3,312 3,027 9.4% Total GWh Sources 27,274 25,316 7.7% 73,262 71,042 3.1% Owned MW Capacity Summer 19,842 19,745 Winter 20,934 20,842 Nuclear Capacity Factor (%) 94 98 Heating and Cooling Degree Days Actual Heating Degree Days 14 1 1,300.0% 1,753 1,771 (1.0%) Cooling Degree Days 1,198 969 23.6% 1,825 1,573 16.0% Variance from Normal Heating Degree Days 8.5% (90.3%) (7.8%) (7.6%) Cooling Degree Days 17.8% (3.9%) 19.1% 3.5% (a) Except as indicated in footnote (b), represents non-weather-normalized billed sales, with energy delivered but not yet billed (i.e., unbilled sales) reflected as a single amount and not allocated to the respective retail classes. (b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales). (c) Statistics reflect Duke Energy's ownership share of jointly owned stations. (d) Generation by source is reported net of auxiliary power. (e) Purchased power includes renewable energy purchases. (f) Based on winter capacity for Fossil, Nuclear and Hydro generation stations, and nameplate capacity for Renewable generation stations. (g) Statistics reflect 100% of jointly owned stations. (b) (b) (a) (c) (d) (e) (c)(f) (g) 32
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Duke Energy Progress Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information September 2026 Three Months Ended September 30, Nine Months Ended September 30, 2026 2025 %Inc. (Dec.) % Inc. (Dec.) WeatherNormal 2026 2025 %Inc. (Dec.) % Inc. (Dec.) WeatherNormal GWh Sales Residential 5,978 5,436 10.0% 15,893 15,202 4.5% Commercial 4,801 4,570 5.1% 12,319 12,005 2.6% Industrial 2,537 2,475 2.5% 7,045 7,307 (3.6%) Other Energy Sales 21 21 —% 63 63 —% Unbilled Sales (376) (530) 29.1% (256) (608) 57.9% Total Retail Sales 12,961 11,972 8.3% 2.7% 35,064 33,969 3.2% 1.2% Wholesale and Other 7,779 6,899 12.8% 21,403 20,145 6.2% Total Consolidated Electric Sales –Duke Energy Progress 20,740 18,871 9.9% 56,467 54,114 4.3% Average Number of Customers Residential 1,559,059 1,530,754 1.8% 1,551,755 1,524,192 1.8% Commercial 250,053 249,167 0.4% 249,809 248,833 0.4% Industrial 2,940 3,026 (2.8%) 2,951 3,047 (3.2%) Other Energy Sales 2,349 2,380 (1.3%) 2,358 2,392 (1.4%) Total Retail Customers 1,814,401 1,785,327 1.6% 1,806,873 1,778,464 1.6% Wholesale and Other 9 8 12.5% 9 8 12.5% Total Average Number of Customers – Duke Energy Progress 1,814,410 1,785,335 1.6% 1,806,882 1,778,472 1.6% Sources of Electric Energy (GWh) Generated – Net Output Coal 3,509 2,115 65.9% 7,327 6,164 18.9% Nuclear 7,842 7,905 (0.8%) 22,426 22,929 (2.2%) Hydro 80 116 (31.0%) 272 433 (37.2%) Natural Gas and Oil 6,680 6,321 5.7% 18,998 17,836 6.5% Renewable Energy 92 58 58.6% 254 176 44.3% Total Generation 18,203 16,515 10.2% 49,277 47,538 3.7% Purchased Power and Net Interchange 3,143 3,048 3.1% 8,695 8,301 4.7% Total Sources of Energy 21,346 19,563 9.1% 57,972 55,839 3.8% Less: Line Loss and Other 606 692 (12.4%) 1,505 1,725 (12.8%) Total GWh Sources 20,740 18,871 9.9% 56,467 54,114 4.3% Owned MW Capacity Summer 12,911 12,585 Winter 14,116 13,880 Nuclear Capacity Factor (%) 95 97 Heating and Cooling Degree Days Actual Heating Degree Days 4 — —% 1,671 1,606 4.0% Cooling Degree Days 1,285 1,040 23.6% 2,016 1,809 11.4% Variance from Normal Heating Degree Days (42.5%) (100.0%) (3.3%) (7.9%) Cooling Degree Days 17.2% (4.4%) 20.2% 8.8% (a) Except as indicated in footnote (b), represents non-weather-normalized billed sales, with energy delivered but not yet billed (i.e., unbilled sales) reflected as a single amount and not allocated to the respective retail classes. (b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales). (c) Statistics reflect Duke Energy's ownership share of jointly owned stations. (d) Generation by source is reported net of auxiliary power. (e) Purchased power includes renewable energy purchases. (f) Based on winter capacity for Fossil, Nuclear and Hydro generation stations, and nameplate capacity for Renewable generation stations. (g) Statistics reflect 100% of jointly owned stations. (b) (b) (a) (c) (d) (e) (c)(f) (g) 33
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Duke Energy Florida Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information September 2026 Three Months Ended September 30, Nine Months Ended September 30, 2026 2025 %Inc. (Dec.) % Inc. (Dec.) WeatherNormal 2026 2025 %Inc. (Dec.) % Inc. (Dec.) WeatherNormal GWh Sales Residential 7,394 7,093 4.2% 17,751 17,333 2.4% Commercial 4,767 4,701 1.4% 12,235 12,067 1.4% Industrial 833 823 1.2% 2,351 2,457 (4.3%) Other Energy Sales 7 6 16.7% 20 20 —% Unbilled Sales (371) (172) —% 355 343 3.5% Total Retail Sales 12,630 12,451 1.4% 1.5% 32,712 32,220 1.5% 0.9% Wholesale and Other 627 587 6.8% 1,603 1,612 (0.6%) Total Electric Sales – Duke Energy Florida 13,257 13,038 1.7% 34,315 33,832 1.4% Average Number of Customers Residential 1,849,168 1,822,296 1.5% 1,843,048 1,816,531 1.5% Commercial 215,393 213,293 1.0% 214,761 212,584 1.0% Industrial 1,591 1,564 1.7% 1,568 1,587 (1.2%) Other Energy Sales 3,452 3,519 (1.9%) 3,475 3,540 (1.8%) Total Retail Customers 2,069,604 2,040,672 1.4% 2,062,852 2,034,242 1.4% Wholesale and Other 11 13 (15.4%) 13 13 —% Total Average Number of Customers –Duke Energy Florida 2,069,615 2,040,685 1.4% 2,062,865 2,034,255 1.4% Sources of Electric Energy (GWh) Generated – Net Output Coal 1,179 1,211 (2.6%) 3,750 2,904 29.1% Natural Gas and Oil 11,122 11,047 0.7% 27,641 28,672 (3.6%) Renewable Energy 1,117 969 15.3% 3,093 2,705 14.3% Total Generation 13,418 13,227 1.4% 34,484 34,281 0.6% Purchased Power and Net Interchange 281 291 (3.4%) 875 742 17.9% Total Sources of Energy 13,699 13,518 1.3% 35,359 35,023 1.0% Less: Line Loss and Other 442 480 (7.9%) 1,044 1,191 (12.3%) Total GWh Sources 13,257 13,038 1.7% 34,315 33,832 1.4% Owned MW Capacity Summer 12,004 10,980 Winter 12,915 12,569 Heating and Cooling Degree Days Actual Heating Degree Days — — —% 416 359 15.9% Cooling Degree Days 1,578 1,579 (0.1%) 3,082 3,055 0.9% Variance from Normal Heating Degree Days —% —% 9.6% (3.8%) Cooling Degree Days 6.0% 5.7% 11.9% 10.0% (a) Except as indicated in footnote (b), represents non-weather-normalized billed sales, with energy delivered but not yet billed (i.e., unbilled sales) reflected as a single amount and not allocated to the respective retail classes. (b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales). (c) Statistics reflect Duke Energy's ownership share of jointly owned stations. (d) Generation by source is reported net of auxiliary power. (e) Purchased power includes renewable energy purchases. (f) Based on winter capacity for Fossil, Nuclear and Hydro generation stations, and nameplate capacity for Renewable generation stations. (b) (b) (a) (c) (d) (e) (c)(f) 34
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Duke Energy Ohio Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information September 2026 Three Months Ended September 30, Nine Months Ended September 30, 2026 2025 %Inc. (Dec.) % Inc. (Dec.) WeatherNormal 2026 2025 %Inc. (Dec.) % Inc. (Dec.) WeatherNormal GWh Sales Residential 2,863 2,769 3.4% 7,413 7,254 2.2% Commercial 2,919 2,854 2.3% 7,671 7,500 2.3% Industrial 1,192 1,285 (7.2%) 3,363 3,507 (4.1%) Other Energy Sales 18 (6) (400.0%) 59 34 73.5% Unbilled Sales (36) (110) 67.3% (37) 28 (232.1%) Total Retail Sales 6,956 6,792 2.4% 0.5% 18,469 18,323 0.8% 0.6% Wholesale and Other 259 159 62.9% 888 406 118.7% Total Electric Sales – Duke Energy Ohio 7,215 6,951 3.8% 19,357 18,729 3.4% Average Number of Customers Residential 844,069 838,473 0.7% 842,989 837,981 0.6% Commercial 77,348 76,385 1.3% 76,900 76,430 0.6% Industrial 1,908 2,018 (5.5%) 1,941 2,057 (5.6%) Other Energy Sales 2,499 2,584 (3.3%) 2,538 2,614 (2.9%) Total Retail Customers 925,824 919,460 0.7% 924,368 919,082 0.6% Wholesale and Other 1 1 —% 1 1 —% Total Average Number of Customers –Duke Energy Ohio 925,825 919,461 0.7% 924,369 919,083 0.6% Sources of Electric Energy (GWh) Generated – Net Output Coal 940 707 33.0% 2,585 2,062 25.4% Natural Gas and Oil 247 159 55.3% 492 294 67.3% Renewable Energy 2 — —% 6 —% Total Generation 1,189 866 37.3% 3,083 2,356 30.9% Purchased Power and Net Interchange 6,622 6,548 1.1% 18,054 18,196 (0.8%) Total Sources of Energy 7,811 7,414 5.4% 21,137 20,552 2.8% Less: Line Loss and Other 596 463 28.7% 1,780 1,823 (2.4%) Total GWh Sources 7,215 6,951 3.8% 19,357 18,729 3.4% Owned MW Capacity Summer 1,085 1,080 Winter 1,173 1,173 Heating and Cooling Degree Days Actual Heating Degree Days 20 18 11.1% 2,780 2,989 (7.0%) Cooling Degree Days 960 843 13.9% 1,320 1,194 10.6% Variance from Normal Heating Degree Days (58.0%) (62.3%) (8.5%) (1.7%) Cooling Degree Days 23.0% 8.1% 17.7% 6.5% (a) Except as indicated in footnote (b), represents non-weather-normalized billed sales, with energy delivered but not yet billed (i.e., unbilled sales) reflected as a single amount and not allocated to the respective retail classes. (b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales). (c) Statistics reflect Duke Energy's ownership share of jointly owned stations. (d) Generation by source is reported net of auxiliary power. (e) Purchased power includes renewable energy purchases. (f) Based on winter capacity for Fossil, Nuclear and Hydro generation stations, and nameplate capacity for Renewable generation stations. (b) (b) (a) (c) (d) (e) (c)(f) 35
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Duke Energy Indiana Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information September 2026 Three Months Ended September 30, Nine Months Ended September 30, 2026 2025 %Inc. (Dec.) % Inc. (Dec.) WeatherNormal 2026 2025 %Inc. (Dec.) % Inc. (Dec.) WeatherNormal GWh Sales Residential 2,768 2,698 2.6% 7,518 7,457 0.8% Commercial 2,544 2,505 1.6% 6,630 6,572 0.9% Industrial 2,597 2,397 8.3% 7,176 6,893 4.1% Other Energy Sales 11 13 (15.4%) 35 38 (7.9%) Unbilled Sales (78) (122) 36.1% (221) (52) (325.0%) Total Retail Sales 7,842 7,491 4.7% 2.5% 21,138 20,908 1.1% 0.9% Wholesale and Other 819 1,213 (32.5%) 2,504 3,658 (31.5%) Total Electric Sales – Duke EnergyIndiana 8,661 8,704 (0.5%) 23,642 24,566 (3.8%) Average Number of Customers Residential 820,022 809,163 1.3% 817,124 807,349.44 1.2% Commercial 107,848 107,052 0.7% 107,655 106,808.67 0.8% Industrial 2,580 2,592 (0.5%) 2,583 2,606.22 (0.9%) Other Energy Sales 3,518 3,685 (4.5%) 3,568 3,716.11 (4.0%) Total Retail Customers 933,968 922,492 1.2% 930,930 920,480.44 1.1% Wholesale and Other 3 4 (25.0%) 3 4 (25.0%) Total Average Number of Customers – Duke Energy Indiana 933,971 922,496 1.2% 930,933 920,484.44 1.1% Sources of Electric Energy (GWh) Generated – Net Output Coal 4,126 4,151 (0.6%) 11,498 11,363 1.2% Hydro 92 58 58.6% 203 172 18.0% Natural Gas and Oil 1,838 1,584 16.0% 4,337 3,764 15.2% Renewable Energy 8 9 (11.1%) 22 23 (4.3%) Total Generation 6,064 5,802 4.5% 16,060 15,322 4.8% Purchased Power and Net Interchange 3,463 3,841 (9.8%) 9,681 10,985 (11.9%) Total Sources of Energy 9,527 9,643 (1.2%) 25,741 26,307 (2.2%) Less: Line Loss and Other 866 939 (7.8%) 2,099 1,741 20.6% Total GWh Sources 8,661 8,704 (0.5%) 23,642 24,566 (3.8%) Owned MW Capacity Summer 6,327 6,302 Winter 6,806 6,806 Heating and Cooling Degree Days Actual Heating Degree Days 22 18 22.2% 2,949 3,179 (7.2%) Cooling Degree Days 981 864 13.5% 1,340 1,218 10.0% Variance from Normal Heating Degree Days (60.8%) (64.5%) (11.1%) (3.2%) Cooling Degree Days 26.7% 11.5% 19.7% 8.7% (a) Except as indicated in footnote (b), represents non-weather-normalized billed sales, with energy delivered but not yet billed (i.e., unbilled sales) reflected as a single amount and not allocated to the respective retail classes. (b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales). (c) Statistics reflect Duke Energy's ownership share of jointly owned stations. (d) Generation by source is reported net of auxiliary power. (e) Purchased power includes renewable energy purchases. (f) Based on winter capacity for Fossil, Nuclear and Hydro generation stations, and nameplate capacity for Renewable generation stations. (b) (b) (a) (c) (d) (e) (c)(f) 36
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Gas Utilities and Infrastructure Quarterly Highlights September 2026 Three Months Ended September 30, Nine Months Ended September 30, 2026 2025 %Inc. (Dec.) 2026 2025 %Inc. (Dec.) Total Sales Piedmont Natural Gas Local Distribution Company (LDC) throughput (dekatherms) 162,597,821 150,368,042 8.1% 479,543,610 457,572,934 4.8% Duke Energy Midwest LDC throughput (Mcf) 9,527,094 9,505,511 0.2% 58,452,917 63,843,944 (8.4%) Average Number of Customers – Piedmont Natural Gas Residential 904,401 1,090,804 (17.1%) 949,109 1,091,309 (13.0%) Commercial 91,286 108,349 (15.7%) 96,052 109,067 (11.9%) Industrial 758 925 (18.1%) 795 937 (15.2%) Power Generation 19 19 —% 19 19 —% Total Average Number of Gas Customers – Piedmont Natural Gas 996,464 1,200,097 (17.0%) 1,045,975 1,201,332 (12.9%) Average Number of Customers – Duke Energy Midwest Residential 523,671 521,730 0.4% 525,811 524,011 0.3% Commercial 33,868 33,337 1.6% 34,714 34,247 1.4% Industrial 1,895 2,080 (8.9%) 1,951 2,205 (11.5%) Other 114 116 (1.7%) 114 117 (2.6%) Total Average Number of Gas Customers – Duke Energy Midwest 559,548 557,263 0.4% 562,590 560,580 0.4% (a) Piedmont has a margin decoupling mechanism in North Carolina, weather normalization mechanisms in South Carolina and Tennessee and fixed-price contracts with most power generation customers that significantly eliminate the impact of throughput changes on earnings. Duke Energy Ohio's rate design also serves to offset this impact. On March 31, 2026, Piedmont closed on the sale of its Tennessee business. (a) (a) 37