Duke Energy — Aug 4, 2026 release

News Release                 Media Contact: Gillian Moore 24-Hour: 800.559.3853 Analyst Contact: Mike Switzer Office: 704.382.6473 August 4, 2026 Duke Energy reports second-quarter 2026 financial results ▪ Second-quarter 2026 reported EPS of $1.38 and adjusted EPS of $1.43; strong first half positions company to deliver full-year results within guidance range ▪ Constructive regulatory outcomes support critical investments to maintain reliability and deliver customer value ▪ Generation build supports growth in jurisdictions, fuels vibrant economies CHARLOTTE, N.C. – Duke Energy (NYSE: DUK) today announced second-quarter 2026 reported EPS of $1.38, prepared in accordance with Generally Accepted Accounting Principles (GAAP), and adjusted EPS of $1.43. This is compared to reported and adjusted EPS of $1.25 for the second quarter of 2025. Adjusted EPS excludes the impact of certain items that are included in reported EPS. The difference between second-quarter 2026 reported and adjusted EPS includes charges related to regulatory settlements. Higher second-quarter 2026 adjusted results were driven by recovery of infrastructure investments to reliably serve customers in our growing jurisdictions. These items were partially offset by higher depreciation on a growing asset base and interest expense. The company is reaffirming its 2026 adjusted EPS guidance of $6.55 to $6.80 and long-term adjusted EPS growth rate of 5% to 7% through 2030 off the 2025 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 had a strong first half of the year, achieving constructive regulatory outcomes, advancing strategic priorities and maintaining excellence in our operational and financial performance,” said Harry Sideris, Duke Energy president and chief executive officer. “Looking ahead, we are well-positioned to deliver on our commitments in 2026 and seize the growth opportunities in some of the most economically attractive states in the country. As we build the critical infrastructure our customers and communities need, we’re ensuring our investments support economic growth and create long-term value while providing reliable energy at the lowest possible cost.” 1 Duke Energy News Release    2 Business segment results In addition to the following summary of second-quarter 2026 business segment performance, comprehensive tables with detailed EPS drivers for the second quarter compared to prior year are provided at the end of this news release. The discussion below of second-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, Electric Utilities and Infrastructure recognized second-quarter 2026 segment income of $1,271 million, compared to segment income of $1,194 million in the second quarter of 2025. In addition to the drivers outlined below, second-quarter 2026 results include the impact of charges related to regulatory settlements, which were treated as special items and excluded from adjusted earnings. On an adjusted basis, Electric Utilities and Infrastructure recognized second-quarter 2026 segment income of $1,310 million, compared to segment income of $1,194 million in the second quarter of 2025. This represents an increase of $0.15 per share. Higher quarterly results were primarily driven by recovery of infrastructure investments to reliably serve customers in our growing jurisdictions, partially offset by higher depreciation on a growing asset base and interest expense. Gas Utilities and Infrastructure On a reported and adjusted basis, Gas Utilities and Infrastructure recognized second-quarter 2026 segment income of $10 million, compared to segment income of $6 million in the second quarter of 2025. Flat quarterly results were primarily driven by recovery of infrastructure investments to reliably serve customers in our growing jurisdictions, offset by lower earnings from the sale of Piedmont's Tennessee business. 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 second-quarter 2026 segment loss of $204 million, compared to segment loss of $228 million in the second quarter of 2025. This represents an increase of $0.03 per share. Higher quarterly results were primarily driven by higher returns on investments and lower interest expense. 2 Duke Energy News Release    3 Effective tax rate Duke Energy's consolidated reported effective tax rate for the second quarter of 2026 was 12.3% compared to 10.6% in the second quarter of 2025. The increase in the reported effective tax rate was primarily due to a decrease in the amortization of excess deferred taxes. Duke Energy's consolidated adjusted effective tax rate was 12.6% for the second quarter of 2026 compared to 10.6% in the second quarter of 2025. The increase in the adjusted effective tax rate was primarily due to a decrease in the amortization of excess deferred 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. Earnings conference call for analysts An earnings conference call for analysts is scheduled at 10 a.m. ET today to discuss second-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 websit e or by diali ng 585.542.9983 in the U.S. or 833.461.5787 outside the U.S. The confirmation code is 485914666. Please c all in 10 to 15 minutes prior to the scheduled start time. Special Items and Non-GAAP Reconciliation The following table presents a reconciliation of GAAP reported EPS to adjusted EPS for second-quarter 2026 and 2025 financial results: (In millions, except per share amounts) After-Tax Amount 2Q 2026 EPS 2Q 2025 EPS EPS, as reported $ 1.38   $ 1.25  Adjustments to reported EPS: Second quarter 2026 Regulatory Settlements $ 39   $ 0.05   Total adjustments (a) $ 0.05   $ —  EPS, adjusted $ 1.43   $ 1.25  (a)    Total EPS adjustments may not foot due to rounding. 3 Duke Energy News Release    4 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. Special items included within the financial statement periods presented, which management does not believe are reflective of ongoing costs, are described below: • Regulatory Settlements represent the impact of charges related to the Duke Energy Carolinas' North Carolina rate case settlements. 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. 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. 4 Duke Energy News Release    5 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: ◦ 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; 5 Duke Energy News Release    6 ◦ The costs of 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; ◦ 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; 6 Duke Energy News Release    7 ◦ 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. 7 DUKE ENERGY CORPORATION REPORTED TO ADJUSTED EARNINGS RECONCILIATION Three Months Ended June 30, 2026 (Dollars in millions, except per share amounts) Special Item Reported Earnings Regulatory Settlements Total Adjustments Adjusted Earnings SEGMENT INCOME (LOSS) Electric Utilities and Infrastructure $ 1,271   $ 39  A $ 39  $ 1,310  Gas Utilities and Infrastructure 10   —  —  10  Total Reportable Segment Income 1,281   39   39   1,320   Other (204) —  —  (204) Net Income Available to Duke Energy Corporation Common Stockholders $ 1,077   $ 39   $ 39   $ 1,116   EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 1.38   $ 0.05   $ 0.05   $ 1.43   Note: Total EPS adjustments may not cross-foot due to rounding. A – Duke Energy Carolinas and Duke Energy Progress recorded a total of $51 million pretax within Impairment of assets and other charges on the Condensed Consolidated Statements of Operations as a result of the Duke Energy Carolinas' North Carolina rate case settlements. Segment income for this matter is net of a $12 million tax benefit. Weighted Average Shares, basic (reported and adjusted) – 779 million 8 DUKE ENERGY CORPORATION REPORTED TO ADJUSTED EARNINGS RECONCILIATION Six Months Ended June 30, 2026 (Dollars in millions, except per share amounts) Special Items Reported Earnings Legal and Regulatory Settlements Asset Sales Discontinued Operations Total Adjustments Adjusted Earnings SEGMENT INCOME (LOSS) Electric Utilities and Infrastructure $ 2,525   $ 189  A $ —  $ —  $ 189  $ 2,714  Gas Utilities and Infrastructure 542   —  (171) B —  (171) 371  Total Reportable Segment Income 3,067   189   (171) —   18   3,085   Other (467) —  —  —  (467) Discontinued Operations 13   —  —  (13) C (13) —  Net Income Available to Duke Energy Corporation Common Stockholders $ 2,613   $ 189   $ (171) $ (13) $ 5   $ 2,618   EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 3.35   $ 0.24   $ (0.22) $ (0.02) $ 0.01   $ 3.36   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' North Carolina rate case 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 9 DUKE ENERGY CORPORATION REPORTED TO ADJUSTED EARNINGS RECONCILIATION Three Months Ended June 30, 2025 (Dollars in millions, except per share amounts) ​ Reported Earnings Discontinued Operations Total Adjustments Adjusted Earnings SEGMENT INCOME (LOSS) Electric Utilities and Infrastructure $ 1,194   $ —  $ —  $ 1,194  Gas Utilities and Infrastructure 6   —  —  6  Total Reportable Segment Income 1,200   —   —   1,200   Other (228) —  —  (228) Discontinued Operations (1) 1  A 1  —  Net Income Available to Duke Energy Corporation Common Stockholders $ 971   $ 1   $ 1   $ 972   EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 1.25   $ —   $ —   $ 1.25   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 DUKE ENERGY CORPORATION REPORTED TO ADJUSTED EARNINGS RECONCILIATION Six Months Ended June 30, 2025 (Dollars in millions, except per share amounts) ​ Reported Earnings Discontinued Operations Total Adjustments Adjusted Earnings SEGMENT INCOME (LOSS) Electric Utilities and Infrastructure $ 2,470   $ —  $ —  $ 2,470  Gas Utilities and Infrastructure 355   —  —  355  Total Reportable Segment Income 2,825   —   —   2,825   Other (488) —  —  (488) Discontinued Operations (1) 1  A 1  —  Net Income Available to Duke Energy Corporation Common Stockholders $ 2,336   $ 1   $ 1   $ 2,337   EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 3.00   $ —   $ —   $ 3.00   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 11 DUKE ENERGY CORPORATION EFFECTIVE TAX RECONCILIATION June 2026 (Dollars in millions) Three Months Ended  June 30, 2026 Six Months Ended  June 30, 2026 Balance Effective Tax Rate Balance Effective Tax Rate Reported Income From Continuing Operations Before Income Taxes $ 1,305  $ 3,202  Legal and Regulatory Settlements 51  248  Asset Sales —  (367) Noncontrolling Interests (64) (96) Preferred Dividends (15) (29) Adjusted Pretax Income $ 1,277  $ 2,958  Reported Income Tax Expense From Continuing Operations $ 160  12.3  % $ 493  15.4  % Legal and Regulatory Settlements 12  59  Asset Sales —  (196) Noncontrolling Interest Portion of Income Taxes (a) (11) (16) Adjusted Tax Expense $ 161  12.6  % $ 340  11.5  % Three Months Ended  June 30, 2025 Six Months Ended  June 30, 2025 Balance Effective Tax Rate Balance Effective Tax Rate Reported Income From Continuing Operations Before Income Taxes $ 1,127  $ 2,724  Noncontrolling Interests (27) (55) Preferred Dividends (13) (27) Adjusted Pretax Income $ 1,087  $ 2,642  Reported Income Tax Expense From Continuing Operations $ 119  10.6  % $ 312  11.5  % Noncontrolling Interest Portion of Income Taxes (a) (4) (7) Adjusted Tax Expense $ 115  10.6  % $ 305  11.5  % (a)    Income tax related to non-pass-through entities for tax purposes. 12 DUKE ENERGY CORPORATION EARNINGS VARIANCES June 2026 QTD vs. Prior Year (Dollars per share) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Consolidated 2025 QTD Reported and Adjusted Earnings Per Share $ 1.54   $ 0.01   $ (0.30) $ 1.25   Weather (0.02) —  —  (0.02) Volume (a) 0.08  —  —  0.08  Riders and Other Retail Margin (b) 0.09  (0.01) —  0.08  Rate case impacts, net (c) 0.10  —  —  0.10  Wholesale 0.04  —  —  0.04  Interest Expense (d) (0.05) —  0.01  (0.04) AFUDC Equity 0.02  —  —  0.02  Depreciation and amortization (d) (0.09) —  —  (0.09) Other (0.02) 0.01  0.02  0.01  Total variance $ 0.15   $ —   $ 0.03   $ 0.18   2026 QTD Adjusted Earnings Per Share $ 1.69   $ 0.01   $ (0.27) $ 1.43   Regulatory Settlements (0.05) —  —  (0.05) 2026 QTD Reported Earnings Per Share $ 1.64   $ 0.01   $ (0.27) $ 1.38   Note: Earnings Per Share amounts are calculated using the consolidated statutory income tax rate for all drivers. Basic weighted average shares outstanding 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 North Carolina Power Bill Reduction Act (SB266) impacts. (c)    Electric Utilities and Infrastructure includes impacts from DEI Step 2 rates, effective March 2026 (+$0.03), DEC North Carolina Year 3 rates, effective January 2026, and DEC South Carolina rates, effective March 2026 (+$0.02), DEF Year 2 rates, effective January 2026 (+$0.02), DEP North Carolina Year 3 rates, effective October 2025, and DEP South Carolina rates, effective February 2026 (+$0.02) and DEK rates, effective July 2025 (+$0.01). (d)    Electric Utilities and Infrastructure excludes rate case impacts. 13 DUKE ENERGY CORPORATION EARNINGS VARIANCES June 2026 YTD vs. Prior Year (Dollars per share) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Discontinued Operations Consolidated 2025 YTD Reported and Adjusted Earnings Per Share $ 3.18   $ 0.45   $ (0.63) $ —   $ 3.00   Weather 0.02  —  —  —  0.02  Volume (a) 0.11  —  —  —  0.11  Riders and Other Retail Margin (b) 0.20  0.02  —  —  0.22  Rate case impacts, net (c) 0.23  0.01  —  —  0.24  Wholesale 0.05  —  —  —  0.05  Operations and maintenance, net of recoverables (d) (0.08) (0.01) —  —  (0.09) Interest Expense (e) (0.07) —  (0.02) —  (0.09) AFUDC Equity 0.04  —  —  —  0.04  Depreciation and amortization (e) (0.16) (0.01) —  —  (0.17) Other (f) (0.03) 0.01  0.05  —  0.03  Total variance $ 0.31   $ 0.02   $ 0.03   $ —   $ 0.36   2026 YTD Adjusted Earnings Per Share $ 3.49   $ 0.47   $ (0.60) $ —   $ 3.36   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 $ 3.25   $ 0.69   $ (0.60) $ 0.02   $ 3.35   Note: Earnings Per Share amounts are calculated using the consolidated statutory income tax rate for all drivers. Basic weighted average shares outstanding 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, SB266 impacts and higher transmission revenues. Gas Utilities and Infrastructure includes higher capital riders and customer growth in North Carolina and South Carolina. (c)    Electric Utilities and Infrastructure includes impacts from DEI Step 2 rates, effective March 2026 (+$0.06), DEC North Carolina Year 3 rates, effective January 2026, and DEC South Carolina rates, effective March 2026 (+$0.05), DEF Year 2 rates, effective January 2026 (+$0.05), DEP North Carolina Year 3 rates, effective October 2025, and DEP South Carolina rates, effective February 2026 (+$0.05) 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)    Other includes lower contributions to the Duke Energy Foundation and higher market returns in the current year. 14 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (In millions, except per share amounts) Three Months Ended Six Months Ended June 30, June 30, 2026 2025 2026 2025 Operating Revenues Regulated electric $ 7,103   $ 6,968  $ 14,906   $ 14,032  Regulated natural gas 418   462  1,715   1,567  Nonregulated electric and other 71   78  149   158  Total operating revenues 7,592   7,508  16,770   15,757  Operating Expenses Fuel used in electric generation and purchased power 1,915   1,878  4,334   3,977  Cost of natural gas 130   158  655   532  Operation, maintenance and other 1,385   1,655  3,137   3,154  Depreciation and amortization 1,700   1,583  3,389   3,095  Property and other taxes 374   415  826   843  Impairment of assets and other charges 49   3  49   3  Total operating expenses 5,553   5,692  12,390   11,604  Gains (Losses) on Sales of Other Assets and Other, net 10   14  394   20  Operating Income 2,049   1,830  4,774   4,173  Other Income and Expenses Equity in earnings (losses) of unconsolidated affiliates 10   11  17   22  Other income and expenses, net 203   183  336   315  Total other income and expenses 213   194  353   337  Interest Expense 957   897  1,925   1,786  Income From Continuing Operations Before Income Taxes 1,305   1,127  3,202   2,724  Income Tax Expense From Continuing Operations 160   119  493   312  Income From Continuing Operations 1,145   1,008  2,709   2,412  Income (Loss) From Discontinued Operations, net of tax —   (1) 13   (1) Net Income 1,145   1,007  2,722   2,411  Less: Net Income Attributable to NCI 53   23  80   48  Net Income Attributable to Duke Energy Corporation 1,092   984  2,642   2,363  Less: Preferred Dividends 15   13  29   27  Net Income Available to Duke Energy Corporation Common Stockholders $ 1,077   $ 971  $ 2,613   $ 2,336  Earnings Per Share – Basic and Diluted Income from continuing operations available to Duke Energy Corporation common stockholders Basic and Diluted $ 1.38   $ 1.25  $ 3.33   $ 3.00  Income (loss) from discontinued operations attributable to Duke Energy Corporation common stockholders Basic and Diluted $ —   $ —  $ 0.02   $ —  Net income available to Duke Energy Corporation common stockholders Basic and Diluted $ 1.38   $ 1.25  $ 3.35   $ 3.00  Weighted average shares outstanding Basic and Diluted 779   777  779   777  15 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (In millions) June 30, 2026 December 31, 2025 ASSETS Current Assets Cash and cash equivalents $ 673   $ 245  Receivables (net of allowance for doubtful accounts of $214 at 2026 and $194 at 2025) 4,482   4,230  Inventory (includes $1,013 at 2026 and $669 at 2025 related to VIEs) 4,665   4,569  Regulatory assets (includes $205 at 2026 and $204 at 2025 related to VIEs) 2,645   1,934  Assets held for sale —   109  Other (includes $145 at 2026 and $88 at 2025 related to VIEs) 684   526  Total current assets 13,149   11,613  Property, Plant and Equipment Cost (includes $3,610 at 2026 and $2,913 at 2025 related to VIEs) 197,562   190,409  Accumulated depreciation and amortization (includes ($138) at 2026 and ($89) at 2025 related to VIEs) (62,326) (60,450) Net property, plant and equipment 135,236   129,959  Other Noncurrent Assets Goodwill 19,010   19,010  Regulatory assets (includes $3,027 at 2026 and $3,108 at 2025 related to VIEs) 14,411   14,379  Nuclear decommissioning trust funds 13,590   12,889  Operating lease right-of-use assets, net 1,166   1,241  Investments in equity method unconsolidated affiliates 332   330  Assets held for sale —   $ 2,148  Other 4,197   4,167  Total other noncurrent assets 52,706   54,164  Total Assets $ 201,091   $ 195,736  LIABILITIES AND EQUITY Current Liabilities Accounts payable (includes $452 at 2026 and $296 at 2025 related to VIEs) $ 4,940   $ 5,223  Notes payable and commercial paper 2,330   2,624  Taxes accrued 1,035   975  Interest accrued 899   922  Current maturities of long-term debt (includes $147 at 2026 and $118 at 2025 related to VIEs) 6,666   7,104  Asset retirement obligations 570   579  Regulatory liabilities 1,422   1,271  Liabilities associated with assets held for sale —   84  Other 2,026   2,265  Total current liabilities 19,888   21,047  Long-Term Debt (includes $3,221 at 2026 and $3,308 at 2025 related to VIEs) 82,242   80,108  Other Noncurrent Liabilities Deferred income taxes 13,344   12,377  Asset retirement obligations 9,202   9,046  Regulatory liabilities 15,359   15,682  Operating lease liabilities 968   1,033  Accrued pension and other post-retirement benefit costs 348   396  Investment tax credits 976   969  Liabilities associated with assets held for sale —   $ 170  Other 1,901   1,889  Total other noncurrent liabilities 42,098   41,562  Commitments and Contingencies Equity Preferred stock, Series A, $0.001 par value, 40 million depositary shares authorized and outstanding at 2026 and 2025 973   973  Common stock, $0.001 par value, 2 billion shares authorized; 780 million and 778 million shares outstanding at 2026 and 2025 1   1  Additional paid-in capital 47,563   45,614  Retained earnings 6,005   5,056  Accumulated other comprehensive income (loss) 209   198  Total Duke Energy Corporation stockholders' equity 54,751   51,842  Noncontrolling Interests 2,112   1,177  Total equity 56,863   53,019  Total Liabilities and Equity $ 201,091   $ 195,736  16 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (In millions) Six Months Ended June 30, 2026 2025 CASH FLOWS FROM OPERATING ACTIVITIES Net Income $ 2,722   $ 2,411  Adjustments to reconcile net income to net cash provided by operating activities 1,550   2,629  Net cash provided by operating activities 4,272   5,040  CASH FLOWS FROM INVESTING ACTIVITIES Net cash used in investing activities (6,209) (6,264) CASH FLOWS FROM FINANCING ACTIVITIES Net cash provided by financing activities 2,424   1,245  Net increase (decrease) in cash, cash equivalents and restricted cash 487   21  Cash, cash equivalents and restricted cash at beginning of period 363   421  Cash, cash equivalents and restricted cash at end of period $ 850   $ 442  17 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited) Three Months Ended June 30, 2026 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Eliminations/Adjustments Duke Energy Operating Revenues Regulated electric $ 7,118  $ —  $ —  $ (15) $ 7,103   Regulated natural gas —  438  —  (20) 418   Nonregulated electric and other 57  11  40  (37) 71   Total operating revenues 7,175  449  40  (72) 7,592   Operating Expenses Fuel used in electric generation and purchased power 1,933  —  —  (18) 1,915   Cost of natural gas —  130  —  —  130   Operation, maintenance and other 1,339  127  (29) (52) 1,385   Depreciation and amortization 1,514  110  83  (7) 1,700   Property and other taxes 343  28  3  —  374   Impairment of assets and other charges 49  —  —  —  49   Total operating expenses 5,178  395  57  (77) 5,553   Gains (Losses) on Sales of Other Assets and Other, net 2  —  7  1  10   Operating Income (Loss) 1,999  54  (10) 6  2,049   Other Income and Expenses Equity in earnings (losses) of unconsolidated affiliates —  4  6  —  10   Other income and expenses, net 156  16  56  (25) 203   Total Other Income and Expenses 156  20  62  (25) 213   Interest Expense 602  61  313  (19) 957   Income (Loss) from Continuing Operations before Income Taxes 1,553  13  (261) —  1,305   Income Tax Expense (Benefit) from Continuing Operations 229  3  (72) —  160   Income (Loss) from Continuing Operations 1,324  10  (189) —  1,145   Less: Net Income Attributable to Noncontrolling Interest 53  —  —  —  53   Net Income (Loss) Attributable to Duke Energy Corporation 1,271  10  (189) —  1,092   Less: Preferred Dividends —  —  15  —  15   Segment Income/Other Net Loss $ 1,271  $ 10  $ (204) $ —  $ 1,077   Discontinued Operations —   Net Income Available to Duke Energy Corporation Common Stockholders $ 1,077   Segment Income/Other Net Loss $ 1,271  $ 10  $ (204) $ —  $ 1,077   Special Items 39  —  —  —  39   Adjusted Earnings (a) $ 1,310  $ 10  $ (204) $ —  $ 1,116   (a)    See Reported to Adjusted Earnings Reconciliation for a detailed reconciliation of Segment Income/Other Net Loss to Adjusted Earnings. 18 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited) Six Months Ended June 30, 2026 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Eliminations/Adjustments Duke Energy Operating Revenues Regulated electric $ 14,935  $ —  $ —  $ (29) $ 14,906   Regulated natural gas —  1,759  —  (44) 1,715   Nonregulated electric and other 118  23  82  (74) 149   Total operating revenues 15,053  1,782  82  (147) 16,770   Operating Expenses Fuel used in electric generation and purchased power 4,373  —  —  (39) 4,334   Cost of natural gas —  655  —  —  655   Operation, maintenance and other 3,048  262  (70) (103) 3,137   Depreciation and amortization 3,012  225  166  (14) 3,389   Property and other taxes 736  85  5  —  826   Impairment of assets and other charges 49  —  —  —  49   Total operating expenses 11,218  1,227  101  (156) 12,390   Gains (Losses) on Sales of Other Assets and Other, net 7  374  12  1  394   Operating Income (Loss) 3,842  929  (7) 10  4,774   Other Income and Expenses Equity in earnings (losses) of unconsolidated affiliates —  10  7  —  17   Other income and expenses, net 292  28  64  (48) 336   Total Other Income and Expenses 292  38  71  (48) 353   Interest Expense 1,173  128  662  (38) 1,925   Income (Loss) from Continuing Operations before Income Taxes 2,961  839  (598) —  3,202   Income Tax Expense (Benefit) from Continuing Operations 356  297  (160) —  493   Income (Loss) from Continuing Operations 2,605  542  (438) —  2,709   Less: Net Income Attributable to Noncontrolling Interest 80  —  —  —  80   Net Income (Loss) Attributable to Duke Energy Corporation 2,525  542  (438) —  2,629   Less: Preferred Dividends —  —  29  —   29   Segment Income/Other Net Loss $ 2,525  $ 542  $ (467) $ —  $ 2,600   Discontinued Operations 13   Net Income Available to Duke Energy Corporation Common Stockholders $ 2,613   Segment Income/Other Net Loss $ 2,525  $ 542  $ (467) $ —  $ 2,600   Special Items 189  (171) —  —  18   Adjusted Earnings (a) $ 2,714  $ 371  $ (467) $ —  $ 2,618   (a)    See Reported to Adjusted Earnings Reconciliation for a detailed reconciliation of Segment Income/Other Net Loss to Adjusted Earnings. 19 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited) Three Months Ended June 30, 2025 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Eliminations/Adjustments Duke Energy Operating Revenues Regulated electric $ 6,982  $ —  $ —  $ (14) $ 6,968   Regulated natural gas —  483  —  (21) 462   Nonregulated electric and other 63  10  40  (35) 78   Total operating revenues 7,045  493  40  (70) 7,508   Operating Expenses Fuel used in electric generation and purchased power 1,898  —  —  (20) 1,878   Cost of natural gas —  158  —  —  158   Operation, maintenance and other 1,594  129  (23) (45) 1,655   Depreciation and amortization 1,402  112  77  (8) 1,583   Property and other taxes 371  41  3  —  415   Impairment of assets and other charges (1) —  5  (1) 3   Total operating expenses 5,264  440  62  (74) 5,692   Gains (Losses) on Sales of Other Assets and Other, net 8  —  6  —  14   Operating Income (Loss) 1,789  53  (16) 4  1,830   Other Income and Expenses Equity in earnings (losses) of unconsolidated affiliates —  1  9  1  11   Other income and expenses, net 163  13  33  (26) 183   Total Other Income and Expenses 163  14  42  (25) 194   Interest Expense 535  65  318  (21) 897   Income (Loss) from Continuing Operations before Income Taxes 1,417  2  (292) —  1,127   Income Tax Expense (Benefit) from Continuing Operations 200  (4) (77) —  119   Income (Loss) from Continuing Operations 1,217  6  (215) —  1,008   Less: Net Income Attributable to Noncontrolling Interest 23  —  —  —  23   Net Income (Loss) Attributable to Duke Energy Corporation 1,194  6  (215) —  985   Less: Preferred Dividends —  —  13  —   13   Segment Income/Other Net Loss $ 1,194  $ 6  $ (228) $ —  $ 972   Discontinued Operations (1) Net Income Available to Duke Energy Corporation Common Stockholders $ 971   20 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited) Six Months Ended June 30, 2025 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Eliminations/Adjustments Duke Energy Operating Revenues Regulated electric $ 14,061  $ —  $ —  $ (29) $ 14,032   Regulated natural gas —  1,612  —  (45) 1,567   Nonregulated electric and other 124  21  82  (69) 158   Total operating revenues 14,185  1,633  82  (143) 15,757   Operating Expenses Fuel used in electric generation and purchased power 4,017  —  —  (40) 3,977   Cost of natural gas —  532  —  —  532   Operation, maintenance and other 3,018  254  (21) (97) 3,154   Depreciation and amortization 2,736  219  154  (14) 3,095   Property and other taxes 749  88  6  —  843   Impairment of assets and other charges (1) —  5  (1) 3   Total operating expenses 10,519  1,093  144  (152) 11,604   Gains (Losses) on Sales of Other Assets and Other, net 9  —  11  —  20   Operating Income (Loss) 3,675  540  (51) 9  4,173   Other Income and Expenses Equity in earnings (losses) of unconsolidated affiliates —  6  15  1  22   Other income and expenses, net 297  26  47  (55) 315   Total Other Income and Expenses 297  32  62  (54) 337   Interest Expense 1,065  130  636  (45) 1,786   Income (Loss) From Continuing Operations Before Income Taxes 2,907  442  (625) —  2,724   Income Tax Expense (Benefit) from Continuing Operations 389  87  (164) —  312   Income (Loss) from Continuing Operations 2,518  355  (461) —  2,412   Less: Net Income Attributable to Noncontrolling Interest 48  —  —  —  48   Net Income (Loss) Attributable to Duke Energy Corporation 2,470  355  (461) —  2,364   Less: Preferred Dividends —  —  27  —   27   Segment Income/Other Net Loss $ 2,470  $ 355  $ (488) $ —  $ 2,337   Discontinued Operations (1) Net Income Available to Duke Energy Corporation Common Stockholders $ 2,336   21 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS (Unaudited) June 30, 2026 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Eliminations/ Adjustments Duke Energy Current Assets Cash and cash equivalents $ 331  $ 8  $ 333  $ 1  $ 673   Receivables, net 4,260  208  14  —  4,482   Receivables from affiliated companies 207  103  1,117  (1,427) —   Notes receivable from affiliated companies 486  26  214  (726) —   Inventory 4,551  78  36  —  4,665   Regulatory assets 2,398  162  85  —  2,645   Other 435  32  288  (71) 684   Total current assets 12,668  617  2,087  (2,223) 13,149   Property, Plant and Equipment Cost 178,175  17,024  2,433  (70) 197,562   Accumulated depreciation and amortization (57,834) (3,536) (956) —  (62,326) Net property, plant and equipment 120,341  13,488  1,477  (70) 135,236   Other Noncurrent Assets Goodwill 17,380  1,630  —  —  19,010   Regulatory assets 13,275  675  461  —  14,411   Nuclear decommissioning trust funds 13,590  —  —  —  13,590   Operating lease right-of-use assets, net 670  2  494  —  1,166   Investments in equity method unconsolidated affiliates 1  180  151  —  332   Investment in consolidated subsidiaries 582  6  81,435  (82,023) —   Other 2,577  333  1,912  (625) 4,197   Total other noncurrent assets 48,075  2,826  84,453  (82,648) 52,706   Total Assets 181,084  16,931  88,017  (84,941) 201,091   Segment reclassifications, intercompany balances and other (1,413) (138) (83,390) 84,941  —   Segment Assets $ 179,671  $ 16,793  $ 4,627  $ —  $ 201,091   22 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY (Unaudited) June 30, 2026 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Eliminations/ Adjustments Duke Energy Current Liabilities Accounts payable $ 3,665  $ 293  $ 982  $ —  $ 4,940   Accounts payable to affiliated companies 653  60  555  (1,268) —   Notes payable to affiliated companies 187  301  238  (726) —   Notes payable and commercial paper —  —  2,330  —  2,330   Taxes accrued 1,022  121  (108) —  1,035   Interest accrued 574  49  276  —  899   Current maturities of long-term debt 4,104  57  2,514  (9) 6,666   Asset retirement obligations 570  —  —  —  570   Regulatory liabilities 1,343  80  —  (1) 1,422   Other 1,554  70  636  (234) 2,026   Total current liabilities 13,672  1,031  7,423  (2,238) 19,888   Long-Term Debt 52,744  4,715  24,845  (62) 82,242   Long-Term Debt Payable to Affiliated Companies 618  7  —  (625) —   Other Noncurrent Liabilities Deferred income taxes 13,203  1,405  (1,273) 9  13,344   Asset retirement obligations 9,108  94  —  —  9,202   Regulatory liabilities 14,312  1,019  28  —  15,359   Operating lease liabilities 608  1  359  —  968   Accrued pension and other post-retirement benefit costs (58) 29  377  —  348   Investment tax credits 975  1  —  —  976   Other 1,406  117  568  (190) 1,901   Total other noncurrent liabilities 39,554  2,666  59  (181) 42,098   Equity Total Duke Energy Corporation stockholders' equity 72,386  8,509  55,690  (81,834) 54,751   Noncontrolling interests 2,110  3  —  (1) 2,112   Total equity 74,496  8,512  55,690  (81,835) 56,863   Total Liabilities and Equity 181,084  16,931  88,017  (84,941) 201,091   Segment reclassifications, intercompany balances and other (1,413) (138) (83,390) 84,941  —   Segment Liabilities and Equity $ 179,671  $ 16,793  $ 4,627  $ —  $ 201,091   23 ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Three Months Ended June 30, 2026 (In millions) Duke Energy Carolinas Duke Energy Progress Duke Energy Florida Duke Energy Ohio (a) Duke Energy Indiana Eliminations/ Other Electric Utilities and Infrastructure Operating Revenues $ 2,416  $ 1,800  $ 1,666  $ 508  $ 861  $ (76) $ 7,175   Operating Expenses Fuel used in electric generation and purchased power 632  547  447  145  250  (88) 1,933   Operation, maintenance and other 451  356  231  96  187  18  1,339   Depreciation and amortization 531  396  306  74  202  5  1,514   Property and other taxes 91  22  127  83  19  1  343   Impairment of assets and other charges 27  22  —  —  —  —  49   Total operating expenses 1,732  1,343  1,111  398  658  (64) 5,178   Gains (Losses) on Sales of Other Assets and Other, net —  —  1  —  —  1  2   Operating Income 684  457  556  110  203  (11) 1,999   Other Income and Expenses, net (b) 72  54  18  4  13  (5) 156   Interest Expense 233  144  127  33  75  (10) 602   Income Before Income Taxes 523  367  447  81  141  (6) 1,553   Income Tax Expense 36  54  91  15  20  13  229   Less: Net Income Attributable to Noncontrolling Interest (c) —  —  —  —  —  53  53   Segment Income $ 487  $ 313  $ 356  $ 66  $ 121  $ (72) $ 1,271   (a)    Includes results of the wholly owned subsidiary, Duke Energy Kentucky. (b)    Includes an equity component of allowance for funds used during construction of $44 million for Duke Energy Carolinas, $30 million for Duke Energy Progress, $3 million for Duke Energy Florida, $4 million for Duke Energy Ohio and $7 million for Duke Energy Indiana. (c)    Includes a noncontrolling interest in Duke Energy Indiana and Florida Progress. 24 ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Six Months Ended June 30, 2026 (In millions) Duke Energy Carolinas Duke Energy Progress Duke Energy Florida Duke Energy Ohio (a) Duke Energy Indiana Eliminations/ Other Electric Utilities and Infrastructure Operating Revenues $ 5,182  $ 4,101  $ 3,287  $ 1,070  $ 1,827  $ (414) $ 15,053   Operating Expenses Fuel used in electric generation and purchased power 1,563  1,410  895  318  620  (433) 4,373   Operation, maintenance and other 1,052  857  550  193  374  22  3,048   Depreciation and amortization 1,057  782  602  156  407  8  3,012   Property and other taxes 197  81  250  170  38  —  736   Impairment of assets and other charges 27  22  —  —  —  —  49   Total operating expenses 3,896  3,152  2,297  837  1,439  (403) 11,218   Gains (Losses) on Sales of Other Assets and Other, net 2  1  3  —  —  1  7   Operating Income 1,288  950  993  233  388  (10) 3,842   Other Income and Expenses, net (b) 135  97  33  8  24  (5) 292   Interest Expense 450  279  254  67  139  (16) 1,173   Income Before Income Taxes 973  768  772  174  273  1  2,961   Income Tax Expense 50  96  156  31  39  (16) 356   Less: Net Income Attributable to Noncontrolling Interest (c) —  —  —  —  —  80  80   Segment Income $ 923  $ 672  $ 616  $ 143  $ 234  $ (63) $ 2,525   (a)    Includes results of the wholly owned subsidiary, Duke Energy Kentucky. (b)    Includes an equity component of allowance for funds used during construction of $85 million for Duke Energy Carolinas, $58 million for Duke Energy Progress, $6 million for Duke Energy Florida, $7 million for Duke Energy Ohio and $16 million for Duke Energy Indiana. (c)    Includes a noncontrolling interest in Duke Energy Indiana and Florida Progress. 25 ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS (Unaudited) June 30, 2026 (In millions) Duke Energy Carolinas Duke Energy Progress Duke Energy Florida Duke Energy Ohio (a) Duke Energy Indiana Eliminations/ Adjustments (b) Electric Utilities and Infrastructure Current Assets Cash and cash equivalents $ 38  $ 244  $ 22  $ 11  $ 16  $ —  $ 331   Receivables, net 1,616  1,106  723  362  445  8  4,260   Receivables from affiliated companies 246  106  136  32  30  (343) 207   Notes receivable from affiliated companies 1,122  —  —  56  184  (876) 486   Inventory 1,528  1,374  873  186  590  —  4,551   Regulatory assets 1,141  847  170  26  215  (1) 2,398   Other 115  134  70  8  117  (9) 435   Total current assets 5,806  3,811  1,994  681  1,597  (1,221) 12,668   Property, Plant and Equipment Cost 64,964  46,816  34,555  9,727  22,039  74  178,175   Accumulated depreciation and amortization (21,125) (17,446) (8,936) (2,643) (7,739) 55  (57,834) Net property, plant and equipment 43,839  29,370  25,619  7,084  14,300  129  120,341   Other Noncurrent Assets Goodwill —  —  —  596  —  16,784  17,380   Regulatory assets 4,765  4,246  2,132  379  975  778  13,275   Nuclear decommissioning trust funds 7,765  5,541  283  —  —  1  13,590   Operating lease right-of-use assets, net 87  357  192  5  30  (1) 670   Investments in equity method unconsolidated affiliates —  —  1  —  —  —  1   Investment in consolidated subsidiaries 56  11  4  510  1  —  582   Other 1,382  776  546  71  245  (443) 2,577   Total other noncurrent assets 14,055  10,931  3,158  1,561  1,251  17,119  48,075   Total Assets 63,700  44,112  30,771  9,326  17,148  16,027  181,084   Segment reclassifications, intercompany balances and other (1,448) (203) (160) (600) (222) 1,220  (1,413) Reportable Segment Assets $ 62,252  $ 43,909  $ 30,611  $ 8,726  $ 16,926  $ 17,247  $ 179,671   (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. 26 ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY (Unaudited) June 30, 2026 (In millions) Duke Energy Carolinas Duke Energy Progress Duke Energy Florida Duke Energy Ohio (a) Duke Energy Indiana Eliminations/ Adjustments (b) Electric Utilities and Infrastructure Current Liabilities Accounts payable $ 1,382  $ 909  $ 683  $ 231  $ 458  $ 2  $ 3,665   Accounts payable to affiliated companies 292  316  239  15  75  (284) 653   Notes payable to affiliated companies —  823  196  44  —  (876) 187   Taxes accrued 247  105  253  332  99  (14) 1,022   Interest accrued 227  146  87  42  71  1  574   Current maturities of long-term debt 1,650  1,094  1,357  (17) 27  (7) 4,104   Asset retirement obligations 239  179  1  6  144  1  570   Regulatory liabilities 611  374  64  69  226  (1) 1,343   Other 615  372  346  77  125  19  1,554   Total current liabilities 5,263  4,318  3,226  799  1,225  (1,159) 13,672   Long-Term Debt 20,235  12,909  10,195  3,492  5,523  390  52,744   Long-Term Debt Payable to Affiliated Companies 300  150  —  18  150  —  618   Other Noncurrent Liabilities Deferred income taxes 4,602  2,923  3,181  899  1,546  52  13,203   Asset retirement obligations 3,585  4,121  170  62  973  197  9,108   Regulatory liabilities 7,914  4,293  772  218  1,141  (26) 14,312   Operating lease liabilities 75  360  144  4  25  —  608   Accrued pension and other post-retirement benefit costs 10  131  82  64  78  (423) (58) Investment tax credits 347  195  248  5  180  —  975   Other 727  440  160  59  28  (8) 1,406   Total other noncurrent liabilities 17,260  12,463  4,757  1,311  3,971  (208) 39,554   Equity Total Duke Energy Corporation stockholders equity 20,642  14,272  12,593  3,706  6,279  14,894  72,386   Noncontrolling interests (c) —  —  —  —  —  2,110  2,110   Total equity 20,642  14,272  12,593  3,706  6,279  17,004  74,496   Total Liabilities and Equity 63,700  44,112  30,771  9,326  17,148  16,027  181,084   Segment reclassifications, intercompany balances and other (1,448) (203) (160) (600) (222) 1,220  (1,413) Reportable Segment Liabilities and Equity $ 62,252  $ 43,909  $ 30,611  $ 8,726  $ 16,926  $ 17,247  $ 179,671   (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. 27 GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Three Months Ended June 30, 2026 (In millions) Duke Energy Ohio (a) Piedmont Natural Gas LDC Midstream Pipelines and Storage (b) Eliminations/ Adjustments Gas Utilities and Infrastructure Operating Revenues $ 157  $ 288  $ 4  $ —  $ 449   Operating Expenses Cost of natural gas 33  97  —  —  130   Operation, maintenance and other 36  87  3  1  127   Depreciation and amortization 40  69  1  —  110   Property and other taxes 25  4  —  (1) 28   Total operating expenses 134  257  4  —  395   Operating Income (Loss) 23  31  —  —  54   Other Income and Expenses Equity in earnings (losses) of unconsolidated affiliates —  —  4  —  4   Other income and expenses, net 2  15  —  (1) 16   Total other income and expenses 2  15  4  (1) 20   Interest Expense 19  41  1  —  61   Income (Loss) Before Income Taxes 6  5  3  (1) 13   Income Tax Expense (Benefit) 2  1  1  (1) 3   Segment Income (Loss) $ 4  $ 4  $ 2  $ —  $ 10   (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. 28 GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Six Months Ended June 30, 2026 (In millions) Duke Energy Ohio (a) Piedmont Natural Gas LDC Midstream Pipelines and Storage (b) Eliminations/ Adjustments Gas Utilities and Infrastructure Operating Revenues $ 474  $ 1,299  $ 9  $ —  $ 1,782   Operating Expenses Cost of natural gas 154  501  —  —  655   Operation, maintenance and other 76  180  6  —  262   Depreciation and amortization 79  143  3  —  225   Property and other taxes 55  30  —  —  85   Total operating expenses 364  854  9  —  1,227   Gains (Losses) on Sales of Other Assets and Other, net (c) —  652  6  (284) 374   Operating Income (Loss) 110  1,097  6  (284) 929   Other Income and Expenses, net Equity in earnings (losses) of unconsolidated affiliates —  —  10  —  10   Other income and expenses, net 3  25  —  —  28   Other Income and Expenses, net 3  25  10  —  38   Interest Expense 37  89  2  —  128   Income (Loss) Before Income Taxes 76  1,033  14  (284) 839   Income Tax Expense (Benefit) 17  259  21  —  297   Segment Income (Loss) $ 59  $ 774  $ (7) $ (284) $ 542   (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. 29 GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS (Unaudited) June 30, 2026 (In millions) Duke Energy Ohio (a) Piedmont Natural Gas LDC Midstream Pipelines and Storage Eliminations/ Adjustments (b) Gas Utilities and Infrastructure Current Assets Cash and cash equivalents $ 5  $ —  $ 4  $ (1) $ 8   Receivables, net 59  149  —  —  208   Receivables from affiliated companies —  104  73  (74) 103   Notes receivable from affiliated companies 32  —  —  (6) 26   Inventory 44  35  —  (1) 78   Regulatory assets 78  84  —  —  162   Other —  25  4  3  32   Total current assets 218  397  81  (79) 617   Property, Plant and Equipment Cost 5,255  11,693  76  —  17,024   Accumulated depreciation and amortization (1,303) (2,216) (17) —  (3,536) Net property, plant and equipment 3,952  9,477  59  —  13,488   Other Noncurrent Assets Goodwill 324  39  —  1,267  1,630   Regulatory assets 327  296  —  52  675   Operating lease right-of-use assets, net —  1  —  1  2   Investments in equity method unconsolidated affiliates —  —  175  5  180   Investment in consolidated subsidiaries —  —  —  6  6   Other 30  288  16  (1) 333   Total other noncurrent assets 681  624  191  1,330  2,826   Total Assets 4,851  10,498  331  1,251  16,931   Segment reclassifications, intercompany balances and other (32) (106) (103) 103  (138) Reportable Segment Assets $ 4,819  $ 10,392  $ 228  $ 1,354  $ 16,793   (a)    Includes balances of the wholly owned subsidiary Duke Energy Kentucky. (b)    Includes the elimination of intercompany balances and purchase accounting adjustments. 30 GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY (Unaudited) June 30, 2026 (In millions) Duke Energy Ohio (a) Piedmont Natural Gas LDC Midstream Pipelines and Storage Eliminations/ Adjustments (b) Gas Utilities and Infrastructure Current Liabilities Accounts payable $ 61  $ 223  $ 9  $ —  $ 293   Accounts payable to affiliated companies 3  118  12  (73) 60   Notes payable to affiliated companies 26  281  —  (6) 301   Taxes accrued 54  67  —  —  121   Interest accrued 9  40  —  —  49   Current maturities of long-term debt 17  40  —  —  57   Regulatory liabilities 26  53  —  1  80   Other 3  66  1  —  70   Total current liabilities 199  888  22  (78) 1,031   Long-Term Debt 860  3,762  53  40  4,715   Long-Term Debt Payable to Affiliated Companies 7  —  —  —  7   Other Noncurrent Liabilities Deferred income taxes 473  878  53  1  1,405   Asset retirement obligations 68  26  —  —  94   Regulatory liabilities 226  783  —  10  1,019   Operating lease liabilities —  1  —  —  1   Accrued pension and other post-retirement benefit costs 23  6  —  —  29   Investment tax credits —  1  —  —  1   Other 35  80  —  2  117   Total other noncurrent liabilities 825  1,775  53  13  2,666   Equity Total Duke Energy Corporation stockholders' equity 2,960  4,073  200  1,276  8,509   Noncontrolling interests —  —  3  —  3   Total equity 2,960  4,073  203  1,276  8,512   Total Liabilities and Equity 4,851  10,498  331  1,251  16,931   Segment reclassifications, intercompany balances and other (32) (106) (103) 103  (138) Reportable Segment Liabilities and Equity $ 4,819  $ 10,392  $ 228  $ 1,354  $ 16,793   (a)    Includes balances of the wholly owned subsidiary Duke Energy Kentucky. (b)    Includes the elimination of intercompany balances and purchase accounting adjustments. 31 Electric Utilities and Infrastructure Quarterly Highlights June 2026 Three Months Ended June 30, Six Months Ended June 30, 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) Gigawatt-hour (GWh) Sales (a) Residential 19,649  19,328  1.7 % 2.1 % 45,054  44,553  1.1 % 0.5 % Commercial 19,525  19,267  1.3 % 1.7 % 38,596  38,169  1.1 % 1.4 % Industrial 11,434  11,751  (2.7 %) (0.5 %) 22,172  22,715  (2.4 %) (1.4 %) Other Energy Sales 124  138  (10.1 %) n/a 254  254  — % n/a Unbilled Sales 2,697  2,811  (4.1 %) n/a 1,022  995  2.7 % n/a Total Retail Sales 53,429  53,295  0.3 % 1.3 % 107,098  106,686  0.4 % 0.4 % Wholesale and Other 11,013  10,866  1.4 % 22,798  22,717  0.4 % Total Consolidated Electric Sales – Electric Utilities and Infrastructure 64,442  64,161  0.4 % 129,896  129,403  0.4 % Average Number of Customers (Electric) Residential 7,638,620  7,520,099  1.6 % 7,627,440  7,509,110  1.6 % Commercial 1,051,759  1,047,601  0.4 % 1,051,299  1,046,413  0.5 % Industrial 14,801  15,125  (2.1 %) 14,798  15,215  (2.7 %) Other Energy Sales 22,612  23,054  (1.9 %) 22,685  23,129  (1.9 %) Total Retail Customers 8,727,792  8,605,879  1.4 % 8,716,222  8,593,867  1.4 % Wholesale and Other 57  52  9.6 % 56  52  7.7 % Total Average Number of Customers – Electric Utilities and Infrastructure 8,727,849  8,605,931  1.4 % 8,716,278  8,593,919  1.4 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 9,169  7,785  17.8 % 20,950  19,132  9.5 % Nuclear 17,959  19,250  (6.7 %) 36,465  38,176  (4.5 %) Hydro 84  452  (81.4 %) 374  898  (58.4 %) Natural Gas and Oil 23,037  22,372  3.0 % 44,802  43,925  2.0 % Renewable Energy 1,310  1,171  11.9 % 2,295  2,012  14.1 % Total Generation (d) 51,559  51,030  1.0 % 104,886  104,143  0.7 % Purchased Power and Net Interchange (e) 15,827  16,214  (2.4 %) 31,066  31,166  (0.3 %) Total Sources of Energy 67,386  67,244  0.2 % 135,952  135,309  0.5 % Less: Line Loss and Other 2,944  3,083  (4.5 %) 6,056  5,906  2.5 % Total GWh Sources 64,442  64,161  0.4 % 129,896  129,403  0.4 % Owned Megawatt (MW) Capacity (c)(f) Summer 52,048  50,569  Winter 55,820  55,216  Nuclear Capacity Factor (%) (g) 93  99  (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. 32 Duke Energy Carolinas Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information June 2026 Three Months Ended June 30, Six Months Ended June 30, 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 6,400 6,165  3.8 % 15,482 15,303 1.2 % Commercial 7,438 7,265  2.4 % 14,772 14,655 0.8 % Industrial 4,890 4,977  (1.7 %) 9,396 9,531 (1.4 %) Other Energy Sales 65 77  (15.6 %) 134 133 0.8 % Unbilled Sales 935 1,080  (13.4 %) 320 350 (8.6 %) Total Retail Sales 19,728 19,564  0.8 % 1.6 % 40,104 39,972 0.3 % 0.4 % Wholesale and Other 2,680 2,604  2.9 % 5,884 5,754 2.3 % Total Consolidated Electric Sales – Duke Energy Carolinas 22,408 22,168  1.1 % 45,988 45,726 0.6 % Average Number of Customers Residential 2,586,496 2,536,178 2.0 % 2,581,223 2,530,372 2.0 % Commercial 402,857 402,816 — % 402,932 402,377 0.1 % Industrial 5,739 5,845 (1.8 %) 5,744 5,870 (2.1 %) Other Energy Sales 10,672 10,803 (1.2 %) 10,686 10,819 (1.2 %) Total Retail Customers 3,005,764 2,955,642 1.7 % 3,000,585 2,949,438 1.7 % Wholesale and Other 30 27 11.1 % 28 26 7.7 % Total Average Number of Customers – Duke Energy Carolinas 3,005,794 2,955,669 1.7 % 3,000,613 2,949,464 1.7 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 2,613  1,538  69.9 % 5,544 4,823 14.9 % Nuclear 10,474  11,363  (7.8 %) 21,881 23,152 (5.5 %) Hydro (55) 216  (125.5 %) 71 467 (84.8 %) Natural Gas and Oil 6,770  6,590  2.7 % 13,221 12,470 6.0 % Renewable Energy 80  87  (8.0 %) 139 144 (3.5 %) Total Generation (d) 19,882  19,794  0.4 % 40,856 41,056 (0.5 %) Purchased Power and Net Interchange (e) 3,516  3,432  2.4 % 7,270 6,670 9.0 % Total Sources of Energy 23,398  23,226  0.7 % 48,126 47,726 0.8 % Less: Line Loss and Other 990  1,058  (6.4 %) 2,138 2,000 6.9 % Total GWh Sources 22,408  22,168  1.1 % 45,988 45,726 0.6 % Owned MW Capacity (c)(f) Summer 19,842 19,745 Winter 20,934 20,842 Nuclear Capacity Factor (%) (g) 93 100 Heating and Cooling Degree Days Actual Heating Degree Days 142  127  11.8 % 1,739 1,770 (1.8 %) Cooling Degree Days 581  596  (2.5 %) 627 604 3.8 % Variance from Normal Heating Degree Days (30.6 %) (38.7 %) (7.9 %) (7.1 %) Cooling Degree Days 14.5 % 18.5 % 21.6 % 18.2 % (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. 33 Duke Energy Progress Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information June 2026 Three Months Ended June 30, Six Months Ended June 30, 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 3,989  3,886  2.7 % 9,915 9,766 1.5 % Commercial 3,719  3,695  0.6 % 7,518 7,435 1.1 % Industrial 2,316  2,375  (2.5 %) 4,508 4,832 (6.7 %) Other Energy Sales 21  21  — % 42 42 — % Unbilled Sales 615  669  (8.1 %) 120 (78) 253.8 % Total Retail Sales 10,660  10,646  0.1 % 1.9 % 22,103 21,997 0.5 % 0.4 % Wholesale and Other 6,780  6,412  5.7 % 13,624 13,246 2.9 % Total Consolidated Electric Sales – Duke Energy Progress 17,440  17,058  2.2 % 35,727 35,243 1.4 % Average Number of Customers Residential 1,551,088 1,523,129 1.8 % 1,548,103 1,520,911 1.8 % Commercial 249,885 249,001 0.4 % 249,687 248,667 0.4 % Industrial 2,940 3,043 (3.4 %) 2,956 3,057 (3.3 %) Other Energy Sales 2,357 2,391 (1.4 %) 2,363 2,399 (1.5 %) Total Retail Customers 1,806,270  1,777,564  1.6 % 1,803,109 1,775,034 1.6 % Wholesale and Other 9  8  12.5 % 9 8 12.5 % Total Average Number of Customers – Duke Energy Progress 1,806,279  1,777,572  1.6 % 1,803,118 1,775,042 1.6 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 1,803  1,773  1.7 % 3,818 4,049 (5.7 %) Nuclear 7,485  7,887  (5.1 %) 14,584 15,024 (2.9 %) Hydro 73  179  (59.2 %) 192 317 (39.4 %) Natural Gas and Oil 5,377  4,996  7.6 % 12,318 11,515 7.0 % Renewable Energy 102  68  50.0 % 162 118 37.3 % Total Generation (d) 14,840  14,903  (0.4 %) 31,074 31,023 0.2 % Purchased Power and Net Interchange (e) 3,257  2,761  18.0 % 5,552 5,253 5.7 % Total Sources of Energy 18,097  17,664  2.5 % 36,626 36,276 1.0 % Less: Line Loss and Other 657  606  8.4 % 899 1,033 (13.0 %) Total GWh Sources 17,440  17,058  2.2 % 35,727 35,243 1.4 % Owned MW Capacity (c)(f) Summer 12,865 12,585 Winter 14,067 13,880 Nuclear Capacity Factor (%) (g) 93 96 Heating and Cooling Degree Days Actual Heating Degree Days 122  83  47.0 % 1,667 1,606 3.8 % Cooling Degree Days 678  754  (10.1 %) 731 769 (4.9 %) Variance from Normal Heating Degree Days (28.2 %) (51.7 %) (3.2 %) (7.5 %) Cooling Degree Days 19.3 % 34.2 % 25.7 % 33.7 % (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. (g)    Statistics reflect 100% of jointly owned stations. 34 Duke Energy Florida Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information June 2026 Three Months Ended June 30, Six Months Ended June 30, 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 5,568 5,622 (1.0 %) 10,357 10,240 1.1 % Commercial 4,035 3,964 1.8 % 7,468 7,366 1.4 % Industrial 744 851 (12.6 %) 1,518 1,634 (7.1 %) Other Energy Sales 6 7 (14.3 %) 13 14 (7.1 %) Unbilled Sales 766 640 — % 726 515 41.0 % Total Retail Sales 11,119 11,084 0.3 % 0.8 % 20,082 19,769 1.6 % 0.5 % Wholesale and Other 623 642 (3.0 %) 976 1,025 (4.8 %) Total Electric Sales – Duke Energy Florida 11,742 11,726 0.1 % 21,058 20,794 1.3 % Average Number of Customers Residential 1,842,536 1,815,652 1.5 % 1,839,988 1,813,649 1.5 % Commercial 214,645 212,623 1.0 % 214,445 212,229 1.0 % Industrial 1,592 1,580 0.8 % 1,556 1,598 (2.6 %) Other Energy Sales 3,474 3,538 (1.8 %) 3,486 3,550 (1.8 %) Total Retail Customers 2,062,247 2,033,393 1.4 % 2,059,475 2,031,026 1.4 % Wholesale and Other 13 12 8.3 % 14 13 7.7 % Total Average Number of Customers – Duke Energy Florida 2,062,260 2,033,405 1.4 % 2,059,489 2,031,039 1.4 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 1,083 1,239 (12.6 %) 2,571 1,693 51.9 % Natural Gas and Oil 9,490 9,621 (1.4 %) 16,519 17,625 (6.3 %) Renewable Energy 1,116 1,007 10.8 % 1,976 1,736 13.8 % Total Generation (d) 11,689 11,867 (1.5 %) 21,066 21,054 0.1 % Purchased Power and Net Interchange (e) 349 343 1.7 % 594 451 31.7 % Total Sources of Energy 12,038 12,210 (1.4 %) 21,660 21,505 0.7 % Less: Line Loss and Other 296 484 (38.8 %) 602 711 (15.3 %) Total GWh Sources 11,742 11,726 0.1 % 21,058 20,794 1.3 % Owned MW Capacity (c)(f) Summer 11,929 10,855 Winter 12,840 12,515 Heating and Cooling Degree Days Actual Heating Degree Days —  —  — % 416 359 15.9 % Cooling Degree Days 1,237  1,261  (1.9 %) 1,504 1,476 1.9 % Variance from Normal Heating Degree Days (100.0 %) (100.0 %) 9.6 % (3.8 %) Cooling Degree Days 16.5 % 17.8 % 18.9 % 15.2 % (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. 35 Duke Energy Ohio Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information June 2026 Three Months Ended June 30, Six Months Ended June 30, 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 1,837 1,813 1.3 % 4,550 4,485 1.4 % Commercial 2,352 2,317 1.5 % 4,752 4,646 2.3 % Industrial 1,060 1,126 (5.9 %) 2,171 2,222 (2.3 %) Other Energy Sales 20 21 (4.8 %) 41 40 2.5 % Unbilled Sales 199 259 (23.2 %) (1) 138 (100.7 %) Total Retail Sales 5,468 5,536 (1.2 %) 0.4 % 11,513 11,531 (0.2 %) 0.6 % Wholesale and Other 362 135 168.1 % 628 247 154.3 % Total Electric Sales – Duke Energy Ohio 5,830 5,671 2.8 % 12,141 11,778 3.1 % Average Number of Customers Residential 842,056 837,594 0.5 % 842,449 837,735 0.6 % Commercial 76,725 76,391 0.4 % 76,676 76,453 0.3 % Industrial 1,944 2,051 (5.2 %) 1,958 2,076 (5.7 %) Other Energy Sales 2,552 2,605 (2.0 %) 2,558 2,629 (2.7 %) Total Retail Customers 923,277 918,641 0.5 % 923,641 918,893 0.5 % Wholesale and Other 1 1 — % 1 1 — % Total Average Number of Customers – Duke Energy Ohio 923,278 918,642 0.5 % 923,642 918,894 0.5 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 745 576 29.3 % 1,645 1,355 21.4 % Natural Gas and Oil 142 98 44.9 % 245 135 81.5 % Renewable Energy 3 — — % 4 — — % Total Generation (d) 890 674 32.0 % 1,894 1,490 27.1 % Purchased Power and Net Interchange (e) 5,525 5,602 (1.4 %) 11,432 11,648 (1.9 %) Total Sources of Energy 6,415 6,276 2.2 % 13,326 13,138 1.4 % Less: Line Loss and Other 585 605 (3.3 %) 1,185 1,360 (12.9 %) Total GWh Sources 5,830 5,671 2.8 % 12,141 11,778 3.1 % Owned MW Capacity (c)(f) Summer 1,085 1,080 Winter 1,173 1,173 Heating and Cooling Degree Days Actual Heating Degree Days 298 408 (27.0 %) 2,760 2,971 (7.1 %) Cooling Degree Days 340 344 (1.2 %) 360  351  2.6 % Variance from Normal Heating Degree Days (32.8 %) (8.0 %) (7.8 %) (0.7 %) Cooling Degree Days 0.6 % 1.8 % 5.7 % 3.1 % (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. 36 Duke Energy Indiana Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information June 2026 Three Months Ended June 30, Six Months Ended June 30, 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 1,855 1,842 0.7 % 4,750 4,759 (0.2 %) Commercial 1,981 2,026 (2.2 %) 4,086 4,067 0.5 % Industrial 2,424 2,422 0.1 % 4,579 4,496 1.8 % Other Energy Sales 12 12 — % 24 25 (4.0 %) Unbilled Sales 182 163 11.7 % (143) 70 (304.3 %) Total Retail Sales 6,454 6,465 (0.2 %) 1.2 % 13,296 13,417 (0.9 %) 0.1 % Wholesale and Other 568 1,073 (47.1 %) 1,686 2,445 (31.0 %) Total Electric Sales – Duke Energy Indiana 7,022 7,538 (6.8 %) 14,982 15,862 (5.5 %) Average Number of Customers Residential 816,444 807,546 1.1 % 815,677 806,443 1.1 % Commercial 107,647 106,770 0.8 % 107,559 106,687 0.8 % Industrial 2,586 2,606 (0.8 %) 2,584 2,614 (1.1 %) Other Energy Sales 3,557 3,717 (4.3 %) 3,592 3,732 (3.8 %) Total Retail Customers 930,234 920,639 1.0 % 929,412 919,476 1.1 % Wholesale and Other 4 4 — % 4 4 — % Total Average Number of Customers – Duke Energy Indiana 930,238 920,643 1.0 % 929,416 919,480 1.1 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 2,925 2,659 10.0 % 7,372 7,212 2.2 % Hydro 66 57 15.8 % 111 114 (2.6 %) Natural Gas and Oil 1,258 1,067 17.9 % 2,499 2,180 14.6 % Renewable Energy 9 9 — % 14 14 — % Total Generation (d) 4,258 3,792 12.3 % 9,996 9,520 5.0 % Purchased Power and Net Interchange (e) 3,180 4,076 (22.0 %) 6,218 7,144 (13.0 %) Total Sources of Energy 7,438 7,868 (5.5 %) 16,214 16,664 (2.7 %) Less: Line Loss and Other 416 330 26.1 % 1,232 802 53.6 % Total GWh Sources 7,022 7,538 (6.8 %) 14,982 15,862 (5.5 %) Owned MW Capacity (c)(f) Summer 6,327 6,304 Winter 6,806 6,806 Heating and Cooling Degree Days Actual Heating Degree Days 348 430 (19.1 %) 2,927 3,161 (7.4 %) Cooling Degree Days 343 352 (2.6 %) 359 354 1.4 % Variance from Normal Heating Degree Days (29.5 %) (12.3 %) (10.2 %) (2.2 %) Cooling Degree Days 0.1 % 2.4 % 4.1 % 2.3 % (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. 37 Gas Utilities and Infrastructure Quarterly Highlights June 2026 Three Months Ended June 30, Six Months Ended June 30, 2026 2025 % Inc. (Dec.) 2026 2025 % Inc. (Dec.) Total Sales Piedmont Natural Gas Local Distribution Company (LDC) throughput (dekatherms) (a) 132,770,392  125,745,045  5.6 % 316,945,789  307,204,892  3.2 % Duke Energy Midwest LDC throughput (Mcf) (a) 12,023,233  13,882,749  (13.4 %) 48,925,823  54,338,433  (10.0 %) Average Number of Customers – Piedmont Natural Gas Residential 907,523  1,090,225  (16.8 %) 971,464  1,091,561  (11.0 %) Commercial 91,772  109,004  (15.8 %) 98,435  109,426  (10.0 %) Industrial 755  940  (19.7 %) 814  943  (13.7 %) Power Generation 19  19  — % 19  19  — % Total Average Number of Gas Customers – Piedmont Natural Gas 1,000,069  1,200,188  (16.7 %) 1,070,732  1,201,949  (10.9 %) Average Number of Customers – Duke Energy Midwest Residential 525,236  523,704  0.3 % 526,881  525,151  0.3 % Commercial 34,503  34,119  1.1 % 35,136  34,702  1.3 % Industrial 1,951  2,200  (11.3 %) 1,979  2,267  (12.7 %) Other 114  117  (2.6 %) 114  117  (2.6 %) Total Average Number of Gas Customers – Duke Energy Midwest 561,804  560,140  0.3 % 564,110  562,237  0.3 % (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. 38