News Release Media Contact: Gillian Moore 24-Hour: 800.559.3853 Analyst Contact: Abby Motsinger Office: 704.382.7624 August 5, 2025 Duke Energy reports second-quarter 2025 financial results ▪ Second-quarter 2025 reported and adjusted EPS of $1.25 ▪ Strong first half performance puts the company on track to deliver full year results within guidance range ▪ Transaction proceeds support material strengthening of company’s credit profile and higher capital deployment at Duke Energy Florida CHARLOTTE, N.C. – Duke Energy (NYSE: DUK) today announced second-quarter 2025 reported EPS, prepared in accordance with Generally Accepted Accounting Principles (GAAP), and adjusted EPS of $1.25. This is compared to reported EPS of $1.13 and adjusted EPS of $1.18 for the second quarter of 2024. Adjusted EPS excludes the impact of certain items that are included in reported EPS. Higher second-quarter 2025 adjusted results were driven by the implementation of new rates and riders, partially offset by higher O&M expenses and interest expense. The company is reaffirming its 2025 adjusted EPS guidance range of $6.17 to $6.42 and long-term adjusted EPS growth rate of 5% to 7% through 2029 off the 2025 midpoint of $6.30. Management does not forecast reported GAAP EPS and related long-term growth rates. “We’ve had a strong start to the year, executing on our strategic priorities of advancing large-scale economic development projects, securing industry-leading regulatory and legislative outcomes, and strengthening the balance sheet,” said Harry Sideris, Duke Energy president and chief executive officer. “To position the company for the significant growth ahead, we recently announced two strategic transactions – an equity investment in Duke Energy Florida and the sale of our Piedmont Tennessee business. These efficient funding sources at compelling valuations materially strengthen our credit profile and help fund the increasing investments needed to meet unprecedented growth over the next decade.” Duke Energy News Release 2 Business segment results In addition to the following summary of second-quarter 2025 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 2025 segment income of $1,194 million, compared to segment income of $1,090 million in the second quarter of 2024. On an adjusted basis, Electric Utilities and Infrastructure recognized second-quarter 2025 segment income of $1,194 million, compared to segment income of $1,115 million in the second quarter of 2024. This represents an increase of $0.10 per share, excluding share dilution of $0.01 per share. Higher quarterly results were primarily due to the implementation of new rates, partially offset by higher O&M expense and interest expense. Gas Utilities and Infrastructure On a reported and adjusted basis, Gas Utilities and Infrastructure recognized second-quarter 2025 segment income of $6 million, compared to reported and adjusted segment income of $6 million in the second quarter of 2024. Flat quarterly results were primarily due to growth from rate increases and riders, offset by higher O&M expenses and depreciation on a growing asset base. 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 2025 segment loss of $228 million, compared to reported and adjusted segment loss of $200 million in the second quarter of 2024. This represents a decrease of $0.02 per share. Lower quarterly results were primarily due to higher interest expense. Duke Energy News Release 3 Effective tax rate Duke Energy's consolidated reported effective tax rate for the second quarter of 2025 was 10.6% compared to 13.1% in the second quarter of 2024. The decrease in the effective tax rate was primarily due to an increase in the amortization of income tax credits and lower state tax expense. Duke Energy's consolidated adjusted effective tax rate was 10.6% for the second quarter of 2025 compared to 13.4% in the second quarter of 2024. The decrease in the adjusted effective tax rate was primarily due to an increase in the amortization of income tax credits and lower state tax expense. 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 2025 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 dialing 833.470.1428 in the U.S. or 929.526.1599 outside the U.S. The confirmation code is 704713. 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 2025 and 2024 financial results: (In millions, except per share amounts) After-Tax Amount 2Q 2025 EPS 2Q 2024 EPS Earnings Per Share, as reported $ 1.25 $ 1.13 Adjustments to reported EPS: Second Quarter 2025 Discontinued Operations 1 — Second Quarter 2024 Regulatory Matters $ 25 $ 0.03 Discontinued Operations (a) 10 0.01 Total adjustments (b) $ — $ 0.05 EPS, adjusted $ 1.25 $ 1.18 (a) Represents the operating results related to the sale of the Commercial Renewables business disposal group. (b) Total EPS adjustments may not foot due to rounding. 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 matters primarily represents impairment charges related to the 2024 Duke Energy Carolinas' South Carolina rate case order. 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. 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 8.6 million customers in North Carolina, South Carolina, Florida, Indiana, Ohio and Kentucky, and collectively own 55,100 megawatts of energy capacity. Its natural gas utilities serve 1.7 million customers in North Carolina, South Carolina, Tennessee, Ohio and Kentucky. Duke Energy is executing an ambitious energy transition, keeping customer reliability and value at the forefront as it builds a smarter energy future. The company is investing in major electric grid upgrades and cleaner generation, including natural gas, nuclear, renewables and energy storage. More information is available at duke-energy.com and the Duke Energy News Center. Follow Duke Energy on X, LinkedIn, Instagram and Facebook, and visit illumination for stories about the people and innovations powering our energy transition. 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 our carbon emission reduction goals, while balancing customer reliability and affordability; ◦ 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, and to earn an adequate return on investment through rate case proceedings and the regulatory process; ◦ 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; Duke Energy News Release 6 ◦ The impact of extraordinary external events, such as a global pandemic 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 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 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 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; Duke Energy News Release 7 ◦ 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; 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. 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 A – Recorded in Loss from Discontinued Operations, net of tax, on the Condensed Consolidated Statements of Operations. Weighted Average Shares, basic (reported and adjusted) – 777 million 8 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 A – Recorded in Loss from Discontinued Operations, net of tax, on the Condensed Consolidated Statements of Operations. Weighted Average Shares, basic (reported and adjusted) – 777 million 9 DUKE ENERGY CORPORATION REPORTED TO ADJUSTED EARNINGS RECONCILIATION Three Months Ended June 30, 2024 (Dollars in millions, except per share amounts) Special Item Reported Earnings Regulatory Matters Discontinued Operations Total Adjustments Adjusted Earnings SEGMENT INCOME (LOSS) Electric Utilities and Infrastructure $ 1,090 $ 25 A $ — $ 25 $ 1,115 Gas Utilities and Infrastructure 6 — — — 6 Total Reportable Segment Income 1,096 25 — 25 1,121 Other (200) — — — (200) Discontinued Operations (10) — 10 B 10 — Net Income Available to Duke Energy Corporation Common Stockholders $ 886 $ 25 $ 10 $ 35 $ 921 EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 1.13 $ 0.03 $ 0.01 $ 0.05 $ 1.18 Note: Earnings Per Share amounts are adjusted for accumulated dividends for Series B Preferred Stock of $(0.02). Total EPS adjustments do not cross-foot due to rounding. A – Net of $6 million tax benefit at Duke Energy Carolinas and $2 million tax benefit at Duke Energy Progress. • $33 million recorded within Impairment of assets and other charges, $2 million recorded within Operations, maintenance and other, and an $11 million reduction recorded within Interest Expense on the Duke Energy Carolinas' Condensed Consolidated Statement of Operations related to the 2024 South Carolina rate case order. • $9 million recorded within Impairment of assets and other charges on the Duke Energy Progress' Condensed Consolidated Statement of Operations related to the 2024 South Carolina rate case order. B – Recorded in Loss from Discontinued Operations, net of tax, on the Condensed Consolidated Statements of Operations. Weighted Average Shares, basic (reported and adjusted) – 772 million 10 DUKE ENERGY CORPORATION REPORTED TO ADJUSTED EARNINGS RECONCILIATION Six Months Ended June 30, 2024 (Dollars in millions, except per share amounts) Special Item Reported Earnings Regulatory Matters Discontinued Operations Total Adjustments Adjusted Earnings SEGMENT INCOME (LOSS) Electric Utilities and Infrastructure $ 2,111 $ 25 A $ — $ 25 $ 2,136 Gas Utilities and Infrastructure 290 — — — 290 Total Reportable Segment Income 2,401 25 — 25 2,426 Other (403) — — — (403) Discontinued Operations (13) — 13 B 13 — Net Income Available to Duke Energy Corporation Common Stockholders $ 1,985 $ 25 $ 13 $ 38 $ 2,023 EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 2.57 $ 0.03 $ 0.02 $ 0.05 $ 2.62 A – Net of $6 million tax benefit at Duke Energy Carolinas and $2 million tax benefit at Duke Energy Progress. • $33 million recorded within Impairment of assets and other charges, $2 million recorded within Operations, maintenance and other, and an $11 million reduction recorded within Interest Expense on the Duke Energy Carolinas' Condensed Consolidated Statement of Operations related to the 2024 South Carolina rate case order. • $9 million recorded within Impairment of assets and other charges on the Duke Energy Progress' Condensed Consolidated Statement of Operations related to the 2024 South Carolina rate case order. B – Recorded in Loss from Discontinued Operations, net of tax, on the Condensed Consolidated Statements of Operations. Weighted Average Shares, basic (reported and adjusted) – 771 million 11 DUKE ENERGY CORPORATION EFFECTIVE TAX RECONCILIATION June 2025 (Dollars in millions) 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 % Three Months Ended June 30, 2024 Six Months Ended June 30, 2024 Balance Effective Tax Rate Balance Effective Tax Rate Reported Income From Continuing Operations Before Income Taxes $ 1,071 $ 2,403 Regulatory Matters 33 33 Noncontrolling Interests (26) (42) Preferred Dividends (14) (53) Adjusted Pretax Income $ 1,064 $ 2,341 Reported Income Tax Expense From Continuing Operations $ 140 13.1 % $ 318 13.2 % Regulatory Matters 8 8 Noncontrolling Interest Portion of Income Taxes (a) (5) (8) Adjusted Tax Expense $ 143 13.4 % $ 318 13.6 % (a) Income tax related to non-pass-through entities for tax purposes. 12 DUKE ENERGY CORPORATION EARNINGS VARIANCES June 2025 QTD vs. Prior Year (Dollars per share) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Discontinued Operations Consolidated 2024 QTD Reported Earnings Per Share $ 1.42 $ 0.01 $ (0.28) $ (0.01) $ 1.13 Regulatory Matters 0.03 — — — 0.03 Discontinued Operations — — — 0.01 0.01 2024 QTD Adjusted Earnings Per Share $ 1.45 $ 0.01 $ (0.28) $ — $ 1.18 Weather 0.01 — — — 0.01 Volume (a) 0.03 — — — 0.03 Riders and Other Retail Margin 0.01 0.01 — — 0.02 Rate case impacts, net (b) 0.19 0.01 — — 0.20 Wholesale (0.01) — — — (0.01) Operations and maintenance, net of recoverables (c) (0.08) (0.01) — — (0.09) Interest Expense (d) (0.04) — (0.04) — (0.08) AFUDC Equity 0.02 — — — 0.02 Depreciation and amortization (d) (0.03) (0.01) — — (0.04) Other — — 0.02 — 0.02 Total variance $ 0.10 $ — $ (0.02) $ — $ 0.08 Change in share count (0.01) — — — (0.01) 2025 QTD Reported and Adjusted Earnings Per Share $ 1.54 $ 0.01 $ (0.30) $ — $ 1.25 Note: Earnings Per Share amounts are calculated using the consolidated statutory income tax rate for all drivers. Basic weighted average shares outstanding increased from 772 million to 777 million. Totals may not foot or cross-foot due to rounding. (a) Includes block and seasonal pricing. (b) Electric Utilities and Infrastructure includes impacts from DEC North Carolina Year 2 rates, effective January 2025, and DEC South Carolina rates, effective August 2024 (+$0.08), DEF multiyear rate plan revenue increases, effective January 2025 (+$0.05), DEI rates, effective February 2025 (+0.04) and DEP North Carolina Year 2 rates, effective October 2024 (+$0.02). Gas Utilities and Infrastructure includes impacts from Piedmont rates, effective November 2024. (c) Electric Utilities and Infrastructure includes higher grid maintenance and generation outage costs, as well as other corporate costs in the current year. (d) Electric Utilities and Infrastructure excludes rate case impacts. 13 DUKE ENERGY CORPORATION EARNINGS VARIANCES June 2025 YTD vs. Prior Year (Dollars per share) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Discontinued Operations Consolidated 2024 YTD Reported Earnings Per Share $ 2.74 $ 0.37 $ (0.52) $ (0.02) $ 2.57 Regulatory Matters 0.03 — — — 0.03 Discontinued Operations — — — 0.02 0.02 2024 YTD Adjusted Earnings Per Share $ 2.77 $ 0.37 $ (0.52) $ — $ 2.62 Weather 0.08 — — — 0.08 Volume 0.15 — — — 0.15 Riders and Other Retail Margin (a) 0.10 0.04 — — 0.14 Rate case impacts, net (b) 0.33 0.08 — — 0.41 Wholesale 0.02 — — — 0.02 Operations and maintenance, net of recoverables (c) (0.12) (0.01) — — (0.13) Interest Expense (d) (0.08) (0.01) (0.08) — (0.17) AFUDC Equity 0.04 — — — 0.04 Depreciation and amortization (d) (0.05) (0.02) — — (0.07) Other (0.04) — (0.03) — (0.07) Total variance $ 0.43 $ 0.08 $ (0.11) $ — $ 0.40 Change in share count (0.02) — — — (0.02) 2025 YTD Reported and Adjusted Earnings Per Share $ 3.18 $ 0.45 $ (0.63) $ — $ 3.00 Note: Earnings Per Share amounts are calculated using the consolidated statutory income tax rate for all drivers. Basic weighted average shares outstanding increased from 771 million to 777 million. (a) Electric Utilities and Infrastructure includes higher grid modernization riders and transmission revenues. Gas Utilities and Infrastructure includes higher construction and pipeline integrity riders in Ohio and Kentucky, as well as higher revenues from the Tennessee Annual Review Mechanism and the South Carolina Rate Stabilization Act mechanism. (b) Electric Utilities and Infrastructure includes impacts from DEC North Carolina Year 2 rates, effective January 2025, and DEC South Carolina rates, effective August 2024 (+$0.15), DEF multiyear rate plan revenue increases, effective January 2025 (+$0.09), DEP North Carolina Year 2 rates, effective October 2024 (+$0.04) and DEI rates, effective February 2025 (+0.04). Gas Utilities and Infrastructure includes impacts from Piedmont rates, effective November 2024. (c) Electric Utilities and Infrastructure includes higher grid maintenance and generation outage costs, as well as other corporate costs in the current year. (d) Electric Utilities and Infrastructure excludes rate case impacts. 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, 2025 2024 2025 2024 Operating Revenues Regulated electric $ 6,968 $ 6,746 $ 14,032 $ 13,478 Regulated natural gas 462 347 1,567 1,213 Nonregulated electric and other 78 79 158 152 Total operating revenues 7,508 7,172 15,757 14,843 Operating Expenses Fuel used in electric generation and purchased power 1,878 2,228 3,977 4,563 Cost of natural gas 158 78 532 310 Operation, maintenance and other 1,655 1,320 3,154 2,699 Depreciation and amortization 1,583 1,409 3,095 2,796 Property and other taxes 415 393 843 779 Impairment of assets and other charges 3 43 3 44 Total operating expenses 5,692 5,471 11,604 11,191 Gains on Sales of Other Assets and Other, net 14 6 20 18 Operating Income 1,830 1,707 4,173 3,670 Other Income and Expenses Equity in earnings of unconsolidated affiliates 11 21 22 38 Other income and expenses, net 183 167 315 336 Total other income and expenses 194 188 337 374 Interest Expense 897 824 1,786 1,641 Income From Continuing Operations Before Income Taxes 1,127 1,071 2,724 2,403 Income Tax Expense From Continuing Operations 119 140 312 318 Income From Continuing Operations 1,008 931 2,412 2,085 Loss From Discontinued Operations, net of tax (1) (10) (1) (13) Net Income 1,007 921 2,411 2,072 Less: Net Income Attributable to Noncontrolling Interests 23 21 48 34 Net Income Attributable to Duke Energy Corporation 984 900 2,363 2,038 Less: Preferred Dividends 13 14 27 53 Net Income Available to Duke Energy Corporation Common Stockholders $ 971 $ 886 $ 2,336 $ 1,985 Earnings Per Share – Basic and Diluted Income from continuing operations available to Duke Energy Corporation common stockholders Basic and Diluted $ 1.25 $ 1.14 $ 3.00 $ 2.59 Loss from discontinued operations attributable to Duke Energy Corporation common stockholders Basic and Diluted $ — $ (0.01) $ — $ (0.02) Net income available to Duke Energy Corporation common stockholders Basic and Diluted $ 1.25 $ 1.13 $ 3.00 $ 2.57 Weighted average shares outstanding Basic and Diluted 777 772 777 771 15 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (In millions) June 30, 2025 December 31, 2024 ASSETS Current Assets Cash and cash equivalents $ 344 $ 314 Receivables (net of allowance for doubtful accounts of $199 at 2025 and $124 at 2024) 4,089 2,232 Receivables of VIEs (net of allowance for doubtful accounts of $85 at 2024) 11 1,889 Receivable from sales of Commercial Renewables Disposal Groups — 551 Inventory (includes $548 at 2025 and $494 at 2024 related to VIEs) 4,434 4,509 Regulatory assets (includes $120 at 2025 and 2024 related to VIEs) 2,269 2,756 Assets held for sale — 4 Other (includes $81 at 2025 and $90 at 2024 related to VIEs) 1,001 695 Total current assets 12,148 12,950 Property, Plant and Equipment Cost 186,261 180,806 Accumulated depreciation and amortization (59,613) (57,503) Net property, plant and equipment 126,648 123,303 Other Noncurrent Assets Goodwill 19,303 19,303 Regulatory assets (includes $1,651 at 2025 and $1,705 at 2024 related to VIEs) 14,172 14,254 Nuclear decommissioning trust funds 12,109 11,434 Operating lease right-of-use assets, net 1,209 1,148 Investments in equity method unconsolidated affiliates 332 353 Assets held for sale — $ 89 Other 3,792 3,509 Total other noncurrent assets 50,917 50,090 Total Assets $ 189,713 $ 186,343 LIABILITIES AND EQUITY Current Liabilities Accounts payable (includes $247 at 2025 and $214 at 2024 related to VIEs) $ 4,373 $ 5,479 Notes payable and commercial paper 3,473 3,584 Taxes accrued 837 851 Interest accrued 881 855 Current maturities of long-term debt (includes $110 at 2025 and $1,012 at 2024 related to VIEs) 5,046 4,349 Asset retirement obligations 636 650 Regulatory liabilities 1,257 1,425 Liabilities associated with assets held for sale 18 80 Other 1,887 2,084 Total current liabilities 18,408 19,357 Long-Term Debt (includes $1,782 at 2025 and $1,842 at 2024 related to VIEs) 78,914 76,340 Other Noncurrent Liabilities Deferred income taxes 11,990 11,424 Asset retirement obligations 9,316 9,342 Regulatory liabilities 15,047 14,694 Operating lease liabilities 1,020 957 Accrued pension and other post-retirement benefit costs 410 434 Investment tax credits 882 894 Liabilities associated with assets held for sale — $ 89 Other (includes $27 at 2024 related to VIEs) 1,696 1,556 Total other noncurrent liabilities 40,361 39,390 Commitments and Contingencies Equity Preferred stock, Series A, $0.001 par value, 40 million depositary shares authorized and outstanding at 2025 and 2024 973 973 Common stock, $0.001 par value, 2 billion shares authorized; 778 million and 776 million shares outstanding at 2025 and 2024 1 1 Additional paid-in capital 45,573 45,494 Retained earnings 4,141 3,431 Accumulated other comprehensive income 203 228 Total Duke Energy Corporation stockholders' equity 50,891 50,127 Noncontrolling interests 1,139 1,129 Total equity 52,030 51,256 Total Liabilities and Equity $ 189,713 $ 186,343 16 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (In millions) Six Months Ended June 30, 2025 2024 CASH FLOWS FROM OPERATING ACTIVITIES Net Income $ 2,411 $ 2,072 Adjustments to reconcile net income to net cash provided by operating activities 2,629 3,355 Net cash provided by operating activities 5,040 5,427 CASH FLOWS FROM INVESTING ACTIVITIES Net cash used in investing activities (6,264) (6,575) CASH FLOWS FROM FINANCING ACTIVITIES Net cash provided by financing activities 1,245 1,274 Net increase in cash, cash equivalents and restricted cash 21 126 Cash, cash equivalents and restricted cash at beginning of period 421 357 Cash, cash equivalents and restricted cash at end of period $ 442 $ 483 17 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 on Sales of Other Assets and Other, net 8 — 6 — 14 Operating Income 1,789 53 (16) 4 1,830 Other Income and Expenses Equity in earnings 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 18 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 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 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 19 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited) Three Months Ended June 30, 2024 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Eliminations/Adjustments Duke Energy Operating Revenues Regulated electric $ 6,763 $ — $ — $ (17) $ 6,746 Regulated natural gas — 369 — (22) 347 Nonregulated electric and other 57 12 40 (30) 79 Total operating revenues 6,820 381 40 (69) 7,172 Operating Expenses Fuel used in electric generation and purchased power 2,247 — — (19) 2,228 Cost of natural gas — 78 — — 78 Operation, maintenance and other 1,262 117 (8) (51) 1,320 Depreciation and amortization 1,246 96 73 (6) 1,409 Property and other taxes 351 38 4 — 393 Impairment of assets and other charges 42 — 1 — 43 Total operating expenses 5,148 329 70 (76) 5,471 Gains on Sales of Other Assets and Other, net 1 — 6 (1) 6 Operating Income 1,673 52 (24) 6 1,707 Other Income and Expenses Equity in earnings of unconsolidated affiliates 1 — 19 1 21 Other income and expenses, net 140 17 48 (38) 167 Total Other Income and Expenses 141 17 67 (37) 188 Interest Expense 488 61 306 (31) 824 Income (Loss) from Continuing Operations before Income Taxes 1,326 8 (263) — 1,071 Income Tax Expense (Benefit) from Continuing Operations 214 2 (77) 1 140 Income (Loss) from Continuing Operations 1,112 6 (186) (1) 931 Less: Net Income Attributable to Noncontrolling Interest 22 — — (1) 21 Net Income (Loss) Attributable to Duke Energy Corporation 1,090 6 (186) — 910 Less: Preferred Dividends — — 14 — 14 Segment Income/Other Net Loss $ 1,090 $ 6 $ (200) $ — $ 896 Discontinued Operations (10) Net Income Available to Duke Energy Corporation Common Stockholders $ 886 Segment Income/Other Net Loss $ 1,090 $ 6 $ (200) $ — $ 896 Special Item 25 — — — 25 Adjusted Earnings (a) $ 1,115 $ 6 $ (200) $ — $ 921 (a) See Reported to Adjusted Earnings Reconciliation for a detailed reconciliation of Segment Income/Other New Loss to Adjusted Earnings. 20 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited) Six Months Ended June 30, 2024 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Eliminations/Adjustments Duke Energy Operating Revenues Regulated electric $ 13,513 $ — $ — $ (35) $ 13,478 Regulated natural gas — 1,258 — (45) 1,213 Nonregulated electric and other 110 25 78 (61) 152 Total operating revenues 13,623 1,283 78 (141) 14,843 Operating Expenses Fuel used in electric generation and purchased power 4,602 — — (39) 4,563 Cost of natural gas — 310 — — 310 Operation, maintenance and other 2,578 246 (26) (99) 2,699 Depreciation and amortization 2,471 194 144 (13) 2,796 Property and other taxes 688 84 7 — 779 Impairment of assets and other charges 43 — 1 — 44 Total operating expenses 10,382 834 126 (151) 11,191 Gains on Sales of Other Assets and Other, net 7 — 11 — 18 Operating Income (Loss) 3,248 449 (37) 10 3,670 Other Income and Expenses Equity in earnings of unconsolidated affiliates 2 — 36 — 38 Other income and expenses, net 270 34 110 (78) 336 Total Other Income and Expenses 272 34 146 (78) 374 Interest Expense 987 122 600 (68) 1,641 Income (Loss) From Continuing Operations Before Income Taxes 2,533 361 (491) — 2,403 Income Tax Expense (Benefit) from Continuing Operations 387 71 (141) 1 318 Income (Loss) from Continuing Operations 2,146 290 (350) (1) 2,085 Less: Net Income Attributable to Noncontrolling Interest 35 — — (1) 34 Net Income (Loss) Attributable to Duke Energy Corporation 2,111 290 (350) — 2,051 Less: Preferred Dividends — — 53 — 53 Segment Income/Other Net Loss $ 2,111 $ 290 $ (403) $ — $ 1,998 Discontinued Operations (13) Net Income Available to Duke Energy Corporation Common Stockholders $ 1,985 Segment Income/Other Net Loss $ 2,111 $ 290 $ (403) $ — $ 1,998 Special Item 25 — — — 25 Adjusted Earnings (a) $ 2,136 $ 290 $ (403) $ — $ 2,023 (a) See Reported to Adjusted Earnings Reconciliation for a detailed reconciliation of Segment Income/Other New Loss to Adjusted Earnings. 21 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS (Unaudited) June 30, 2025 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other (a) Eliminations/ Adjustments Duke Energy Current Assets Cash and cash equivalents $ 63 $ 10 $ 270 $ 1 $ 344 Receivables, net 3,829 256 4 — 4,089 Receivables of variable interest entities, net 11 — — — 11 Receivables from affiliated companies 195 152 895 (1,242) — Notes receivable from affiliated companies 1,069 2 7 (1,078) — Inventory 4,331 66 37 — 4,434 Regulatory assets 2,044 136 89 — 2,269 Other 674 99 295 (67) 1,001 Total current assets 12,216 721 1,597 (2,386) 12,148 Property, Plant and Equipment Cost 164,779 18,245 3,313 (76) 186,261 Accumulated depreciation and amortization (53,818) (3,756) (2,038) (1) (59,613) Net property, plant and equipment 110,961 14,489 1,275 (77) 126,648 Other Noncurrent Assets Goodwill 17,379 1,924 — — 19,303 Regulatory assets 12,828 831 513 — 14,172 Nuclear decommissioning trust funds 12,109 — — — 12,109 Operating lease right-of-use assets, net 782 3 424 — 1,209 Investments in equity method unconsolidated affiliates 1 179 152 — 332 Investment in consolidated subsidiaries 515 6 77,127 (77,648) — Other 2,548 315 1,554 (625) 3,792 Total other noncurrent assets 46,162 3,258 79,770 (78,273) 50,917 Total Assets 169,339 18,468 82,642 (80,736) 189,713 Segment reclassifications, intercompany balances and other (1,919) (163) (78,654) 80,736 — Segment Assets $ 167,420 $ 18,305 $ 3,988 $ — $ 189,713 (a) Includes amounts in held for sale accounts related to the Commercial Renewables Disposal Groups. 22 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY (Unaudited) June 30, 2025 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other (a) Eliminations/ Adjustments Duke Energy Current Liabilities Accounts payable $ 3,501 $ 241 $ 632 $ (1) $ 4,373 Accounts payable to affiliated companies 864 47 207 (1,118) — Notes payable to affiliated companies 2 727 349 (1,078) — Notes payable and commercial paper — — 3,473 — 3,473 Taxes accrued 1,057 49 (269) — 837 Interest accrued 574 53 254 — 881 Current maturities of long-term debt 1,927 255 2,871 (7) 5,046 Asset retirement obligations 636 — — — 636 Regulatory liabilities 1,234 23 — — 1,257 Liabilities associated with assets held for sale — — 18 — 18 Other 1,413 86 577 (189) 1,887 Total current liabilities 11,208 1,481 8,112 (2,393) 18,408 Long-Term Debt 49,997 4,765 24,222 (70) 78,914 Long-Term Debt Payable to Affiliated Companies 618 7 — (625) — Other Noncurrent Liabilities Deferred income taxes 12,149 1,555 (1,714) — 11,990 Asset retirement obligations 9,224 93 — (1) 9,316 Regulatory liabilities 13,817 1,201 30 (1) 15,047 Operating lease liabilities 714 2 303 1 1,020 Accrued pension and other post-retirement benefit costs 181 29 200 — 410 Investment tax credits 881 1 — — 882 Other 1,169 165 549 (187) 1,696 Total other noncurrent liabilities 38,135 3,046 (632) (188) 40,361 Equity Total Duke Energy Corporation stockholders' equity 68,245 9,166 50,940 (77,460) 50,891 Noncontrolling interests 1,136 3 — — 1,139 Total equity 69,381 9,169 50,940 (77,460) 52,030 Total Liabilities and Equity 169,339 18,468 82,642 (80,736) 189,713 Segment reclassifications, intercompany balances and other (1,919) (163) (78,654) 80,736 — Segment Liabilities and Equity $ 167,420 $ 18,305 $ 3,988 $ — $ 189,713 (a) Includes amounts in held for sale accounts related to the Commercial Renewables Disposal Groups. 23 ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Three Months Ended June 30, 2025 (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 $ 2,231 $ 1,681 $ 1,885 $ 498 $ 821 $ (71) $ 7,045 Operating Expenses Fuel used in electric generation and purchased power 571 574 451 161 219 (78) 1,898 Operation, maintenance and other 488 333 495 87 189 2 1,594 Depreciation and amortization 482 319 290 83 222 6 1,402 Property and other taxes 85 45 130 80 17 14 371 Impairment of assets and other charges (1) — — — — — (1) Total operating expenses 1,625 1,271 1,366 411 647 (56) 5,264 Gains on Sales of Other Assets and Other, net 6 — — — — 2 8 Operating Income 612 410 519 87 174 (13) 1,789 Other Income and Expenses, net (b) 62 50 26 4 22 (1) 163 Interest Expense 200 139 116 32 56 (8) 535 Income Before Income Taxes 474 321 429 59 140 (6) 1,417 Income Tax Expense 39 40 81 9 20 11 200 Less: Net Income Attributable to Noncontrolling Interest (c) — — — — — 23 23 Segment Income $ 435 $ 281 $ 348 $ 50 $ 120 $ (40) $ 1,194 (a) Includes results of the wholly owned subsidiary, Duke Energy Kentucky. (b) Includes an equity component of allowance for funds used during construction of $34 million for Duke Energy Carolinas, $22 million for Duke Energy Progress, $6 million for Duke Energy Florida, $2 million for Duke Energy Ohio and $8 million for Duke Energy Indiana. (c) Includes a noncontrolling interest in Duke Energy Indiana. 24 ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Six Months Ended June 30, 2025 (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 $ 4,755 $ 3,699 $ 3,329 $ 985 $ 1,679 $ (262) $ 14,185 Operating Expenses Fuel used in electric generation and purchased power 1,374 1,299 832 310 479 (277) 4,017 Operation, maintenance and other 962 724 777 179 382 (6) 3,018 Depreciation and amortization 914 676 564 159 414 9 2,736 Property and other taxes 187 105 242 166 35 14 749 Impairment of assets and other charges (1) — — — — — (1) Total operating expenses 3,436 2,804 2,415 814 1,310 (260) 10,519 Gains on Sales of Other Assets and Other, net 6 — 1 — — 2 9 Operating Income 1,325 895 915 171 369 — 3,675 Other Income and Expenses, net (b) 123 89 47 8 32 (2) 297 Interest Expense 400 267 234 63 116 (15) 1,065 Income Before Income Taxes 1,048 717 728 116 285 13 2,907 Income Tax Expense 92 98 141 18 38 2 389 Less: Net Income Attributable to Noncontrolling Interest (c) — — — — — 48 48 Segment Income $ 956 $ 619 $ 587 $ 98 $ 247 $ (37) $ 2,470 (a) Includes results of the wholly owned subsidiary, Duke Energy Kentucky. (b) Includes an equity component of allowance for funds used during construction of $66 million for Duke Energy Carolinas, $41 million for Duke Energy Progress, $11 million for Duke Energy Florida, $5 million for Duke Energy Ohio and $15 million for Duke Energy Indiana. (c) Includes a noncontrolling interest in Duke Energy Indiana. 25 ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS (Unaudited) June 30, 2025 (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 $ 7 $ 24 $ 16 $ 7 $ 9 $ — $ 63 Receivables, net 1,241 934 801 380 463 10 3,829 Receivables of variable interest entities, net 1 5 4 — — 1 11 Receivables from affiliated companies 210 31 72 23 — (141) 195 Notes receivable from affiliated companies 27 949 — 7 235 (149) 1,069 Inventory 1,524 1,323 767 166 550 1 4,331 Regulatory assets 656 614 562 38 176 (2) 2,044 Other 354 157 85 2 84 (8) 674 Total current assets 4,020 4,037 2,307 623 1,517 (288) 12,216 Property, Plant and Equipment Cost 60,065 43,320 31,665 9,183 20,492 54 164,779 Accumulated depreciation and amortization (19,637) (16,550) (8,034) (2,459) (7,174) 36 (53,818) Net property, plant and equipment 40,428 26,770 23,631 6,724 13,318 90 110,961 Other Noncurrent Assets Goodwill — — — 596 — 16,783 17,379 Regulatory assets 3,985 4,654 2,105 398 1,050 636 12,828 Nuclear decommissioning trust funds 6,880 4,922 308 — — (1) 12,109 Operating lease right-of-use assets, net 88 403 250 6 35 — 782 Investments in equity method unconsolidated affiliates — — 1 — — — 1 Investment in consolidated subsidiaries 56 10 4 444 1 — 515 Other 1,198 770 490 64 260 (234) 2,548 Total other noncurrent assets 12,207 10,759 3,158 1,508 1,346 17,184 46,162 Total Assets 56,655 41,566 29,096 8,855 16,181 16,986 169,339 Segment reclassifications, intercompany balances and other (320) (1,080) (93) (477) (241) 292 (1,919) Reportable Segment Assets $ 56,335 $ 40,486 $ 29,003 $ 8,378 $ 15,940 $ 17,278 $ 167,420 (a) Includes balances of the wholly owned subsidiary Duke Energy Kentucky. (b) Includes the elimination of intercompany balances, purchase accounting adjustments and Commercial Transmission and Duke Energy Indiana Holdco, LLC balances. 26 ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY (Unaudited) June 30, 2025 (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 $ 1,346 $ 581 $ 977 $ 230 $ 365 $ 2 $ 3,501 Accounts payable to affiliated companies 492 391 63 18 67 (167) 864 Notes payable to affiliated companies — — 67 83 — (148) 2 Taxes accrued 278 107 340 229 83 20 1,057 Interest accrued 228 156 86 41 63 — 574 Current maturities of long-term debt 23 582 1,235 91 4 (8) 1,927 Asset retirement obligations 259 222 1 7 148 (1) 636 Regulatory liabilities 571 272 83 37 270 1 1,234 Other 477 310 352 66 209 (1) 1,413 Total current liabilities 3,674 2,621 3,204 802 1,209 (302) 11,208 Long-Term Debt 18,022 13,483 9,785 3,341 4,941 425 49,997 Long-Term Debt Payable to Affiliated Companies 300 150 — 18 150 — 618 Other Noncurrent Liabilities Deferred income taxes 4,199 2,510 3,013 873 1,503 51 12,149 Asset retirement obligations 3,716 4,123 196 69 1,105 15 9,224 Regulatory liabilities 6,893 4,799 660 237 1,254 (26) 13,817 Operating lease liabilities 78 404 197 5 31 (1) 714 Accrued pension and other post-retirement benefit costs 21 137 88 69 82 (216) 181 Investment tax credits 309 142 241 5 185 (1) 881 Other 672 264 155 69 21 (12) 1,169 Total other noncurrent liabilities 15,888 12,379 4,550 1,327 4,181 (190) 38,135 Equity Total Duke Energy Corporation stockholders equity 18,771 12,933 11,557 3,367 5,700 15,917 68,245 Noncontrolling interests (c) — — — — — 1,136 1,136 Total equity 18,771 12,933 11,557 3,367 5,700 17,053 69,381 Total Liabilities and Equity 56,655 41,566 29,096 8,855 16,181 16,986 169,339 Segment reclassifications, intercompany balances and other (320) (1,080) (93) (477) (241) 292 (1,919) Reportable Segment Liabilities and Equity $ 56,335 $ 40,486 $ 29,003 $ 8,378 $ 15,940 $ 17,278 $ 167,420 (a) Includes balances of the wholly owned subsidiary Duke Energy Kentucky. (b) Includes the elimination of intercompany balances, purchase accounting adjustments and Commercial Transmission and Duke Energy Indiana Holdco, LLC balances. (c) Includes a noncontrolling interest in Duke Energy Indiana. 27 GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Three Months Ended June 30, 2025 (In millions) Duke Energy Ohio (a) Piedmont Natural Gas LDC Midstream Pipelines and Storage (b) Eliminations/ Adjustments Gas Utilities and Infrastructure Operating Revenues $ 156 $ 335 $ 3 $ (1) $ 493 Operating Expenses Cost of natural gas 35 124 — (1) 158 Operation, maintenance and other 27 101 — 1 129 Depreciation and amortization 39 71 2 — 112 Property and other taxes 21 19 2 (1) 41 Total operating expenses 122 315 4 (1) 440 Operating Income (Loss) 34 20 (1) — 53 Other Income and Expenses Equity in earnings of unconsolidated affiliates — — 1 — 1 Other income and expenses, net 2 11 — — 13 Total other income and expenses 2 11 1 — 14 Interest Expense 18 47 1 (1) 65 Income (Loss) Before Income Taxes 18 (16) (1) 1 2 Income Tax Expense (Benefit) 3 (7) — — (4) Segment Income (Loss) $ 15 $ (9) $ (1) $ 1 $ 6 (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, 2025 (In millions) Duke Energy Ohio (a) Piedmont Natural Gas LDC Midstream Pipelines and Storage (b) Eliminations/ Adjustments Gas Utilities and Infrastructure Operating Revenues $ 435 $ 1,192 $ 7 $ (1) $ 1,633 Operating Expenses Cost of natural gas 136 396 — — 532 Operation, maintenance and other 56 195 — 3 254 Depreciation and amortization 75 141 4 (1) 219 Property and other taxes 51 37 3 (3) 88 Total operating expenses 318 769 7 (1) 1,093 Operating Income 117 423 — — 540 Other Income and Expenses, net Equity in earnings of unconsolidated affiliates — — 6 — 6 Other income and expenses, net 4 22 — — 26 Other Income and Expenses, net 4 22 6 — 32 Interest Expense 34 94 2 — 130 Income Before Income Taxes 87 351 4 — 442 Income Tax Expense 17 69 1 — 87 Segment Income $ 70 $ 282 $ 3 $ — $ 355 (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. 29 GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS (Unaudited) June 30, 2025 (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 $ 3 $ 2 $ 5 $ — $ 10 Receivables, net 62 195 — (1) 256 Receivables from affiliated companies — 88 135 (71) 152 Notes receivable from affiliated companies 4 — — (2) 2 Inventory 15 51 — — 66 Regulatory assets 5 131 — — 136 Other 17 79 3 — 99 Total current assets 106 546 143 (74) 721 Property, Plant and Equipment Cost 5,043 13,129 73 — 18,245 Accumulated depreciation and amortization (1,233) (2,512) (11) — (3,756) Net property, plant and equipment 3,810 10,617 62 — 14,489 Other Noncurrent Assets Goodwill 324 49 — 1,551 1,924 Regulatory assets 324 446 — 61 831 Operating lease right-of-use assets, net — 3 — — 3 Investments in equity method unconsolidated affiliates — — 174 5 179 Investment in consolidated subsidiaries — — — 6 6 Other 23 273 18 1 315 Total other noncurrent assets 671 771 192 1,624 3,258 Total Assets 4,587 11,934 397 1,550 18,468 Segment reclassifications, intercompany balances and other (5) (90) (135) 67 (163) Reportable Segment Assets $ 4,582 $ 11,844 $ 262 $ 1,617 $ 18,305 (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, 2025 (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 $ 40 $ 195 $ 6 $ — $ 241 Accounts payable to affiliated companies 4 96 18 (71) 47 Notes payable to affiliated companies 47 682 — (2) 727 Taxes accrued 11 42 (3) (1) 49 Interest accrued 8 45 — — 53 Current maturities of long-term debt 49 205 — 1 255 Regulatory liabilities 16 7 — — 23 Other 4 81 — 1 86 Total current liabilities 179 1,353 21 (72) 1,481 Long-Term Debt 858 3,799 59 49 4,765 Long-Term Debt Payable to Affiliated Companies 7 — — — 7 Other Noncurrent Liabilities Deferred income taxes 448 1,037 68 2 1,555 Asset retirement obligations 63 29 — 1 93 Regulatory liabilities 230 959 — 12 1,201 Operating lease liabilities — 2 — — 2 Accrued pension and other post-retirement benefit costs 23 6 — — 29 Investment tax credits — 1 — — 1 Other 21 146 — (2) 165 Total other noncurrent liabilities 785 2,180 68 13 3,046 Equity Total Duke Energy Corporation stockholders' equity 2,758 4,602 246 1,560 9,166 Noncontrolling interests — — 3 — 3 Total equity 2,758 4,602 249 1,560 9,169 Total Liabilities and Equity 4,587 11,934 397 1,550 18,468 Segment reclassifications, intercompany balances and other (5) (90) (135) 67 (163) Reportable Segment Liabilities and Equity $ 4,582 $ 11,844 $ 262 $ 1,617 $ 18,305 (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 2025 Three Months Ended June 30, Six Months Ended June 30, 2025 2024 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) 2025 2024 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) Gigawatt-hour (GWh) Sales (a) Residential 19,328 19,564 (1.2 %) (0.5 %) 44,553 42,268 5.4 % 1.6 % Commercial 19,267 19,423 (0.8 %) 0.4 % 38,169 37,592 1.5 % 1.0 % Industrial 11,751 11,835 (0.7 %) (2.2 %) 22,715 23,284 (2.4 %) (1.6 %) Other Energy Sales 138 129 7.0 % n/a 254 265 (4.2 %) n/a Unbilled Sales 2,811 2,734 2.8 % n/a 995 940 5.9 % n/a Total Retail Sales 53,295 53,685 (0.7 %) (0.6 %) 106,686 104,349 2.2 % 0.7 % Wholesale and Other 10,866 11,301 (3.8 %) 22,717 21,247 6.9 % Total Consolidated Electric Sales – Electric Utilities and Infrastructure 64,161 64,986 (1.3 %) 129,403 125,596 3.0 % Average Number of Customers (Electric) Residential 7,520,099 7,391,580 1.7 % 7,509,110 7,373,551 1.8 % Commercial 1,047,601 1,043,945 0.4 % 1,046,413 1,042,841 0.3 % Industrial 15,125 15,708 (3.7 %) 15,215 15,756 (3.4 %) Other Energy Sales 23,054 23,723 (2.8 %) 23,129 23,781 (2.7 %) Total Retail Customers 8,605,879 8,474,956 1.5 % 8,593,867 8,455,929 1.6 % Wholesale and Other 52 51 2.0 % 52 51 2.0 % Total Average Number of Customers – Electric Utilities and Infrastructure 8,605,931 8,475,007 1.5 % 8,593,919 8,455,980 1.6 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 7,785 9,985 (22.0 %) 19,132 19,374 (1.2 %) Nuclear 19,250 17,950 7.2 % 38,176 37,032 3.1 % Hydro 452 447 1.1 % 898 1,428 (37.1 %) Natural Gas and Oil 22,372 22,921 (2.4 %) 43,925 42,802 2.6 % Renewable Energy 1,171 1,038 12.8 % 2,012 1,706 17.9 % Total Generation (d) 51,030 52,341 (2.5 %) 104,143 102,342 1.8 % Purchased Power and Net Interchange (e) 16,214 15,355 5.6 % 31,166 29,483 5.7 % Total Sources of Energy 67,244 67,696 (0.7 %) 135,309 131,825 2.6 % Less: Line Loss and Other 3,083 2,710 13.8 % 5,906 6,229 (5.2 %) Total GWh Sources 64,161 64,986 (1.3 %) 129,403 125,596 3.0 % Owned Megawatt (MW) Capacity (c) Summer 50,569 50,430 Winter 55,216 54,944 Nuclear Capacity Factor (%) (f) 99 95 (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) Statistics reflect 100% of jointly owned stations. 32 Duke Energy Carolinas Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information June 2025 Three Months Ended June 30, Six Months Ended June 30, 2025 2024 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) 2025 2024 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 6,165 6,256 (1.5 %) 15,303 14,497 5.6 % Commercial 7,265 7,432 (2.2 %) 14,655 14,664 (0.1 %) Industrial 4,977 4,985 (0.2 %) 9,531 9,671 (1.4 %) Other Energy Sales 77 68 13.2 % 133 136 (2.2 %) Unbilled Sales 1,080 1,151 (6.2 %) 350 475 (26.3 %) Total Retail Sales 19,564 19,892 (1.6 %) (1.1 %) 39,972 39,443 1.3 % 0.1 % Wholesale and Other 2,604 2,592 0.5 % 5,754 5,429 6.0 % Total Consolidated Electric Sales – Duke Energy Carolinas 22,168 22,484 (1.4 %) 45,726 44,872 1.9 % Average Number of Customers Residential 2,536,178 2,480,757 2.2 % 2,530,372 2,473,067 2.3 % Commercial 402,816 402,323 0.1 % 402,377 402,055 0.1 % Industrial 5,845 5,959 (1.9 %) 5,870 5,964 (1.6 %) Other Energy Sales 10,803 11,064 (2.4 %) 10,819 11,092 (2.5 %) Total Retail Customers 2,955,642 2,900,103 1.9 % 2,949,438 2,892,178 2.0 % Wholesale and Other 27 24 12.5 % 26 25 4.0 % Total Average Number of Customers – Duke Energy Carolinas 2,955,669 2,900,127 1.9 % 2,949,464 2,892,203 2.0 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 1,538 2,696 (43.0 %) 4,823 5,611 (14.0 %) Nuclear 11,363 10,894 4.3 % 23,152 22,729 1.9 % Hydro 216 209 3.3 % 467 861 (45.8 %) Natural Gas and Oil 6,590 6,158 7.0 % 12,470 12,060 3.4 % Renewable Energy 87 99 (12.1 %) 144 172 (16.3 %) Total Generation (d) 19,794 20,056 (1.3 %) 41,056 41,433 (0.9 %) Purchased Power and Net Interchange (e) 3,432 3,273 4.9 % 6,670 5,480 21.7 % Total Sources of Energy 23,226 23,329 (0.4 %) 47,726 46,913 1.7 % Less: Line Loss and Other 1,058 845 25.2 % 2,000 2,041 (2.0 %) Total GWh Sources 22,168 22,484 (1.4 %) 45,726 44,872 1.9 % Owned MW Capacity (c) Summer 19,745 19,688 Winter 20,842 20,735 Nuclear Capacity Factor (%) (f) 100 97 Heating and Cooling Degree Days Actual Heating Degree Days 127 124 2.4 % 1,770 1,599 10.7 % Cooling Degree Days 596 624 (4.5 %) 604 627 (3.7 %) Variance from Normal Heating Degree Days (38.7 %) (40.8 %) (7.1 %) (17.6 %) Cooling Degree Days 18.5 % 22.6 % 18.2 % 21.5 % (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) Statistics reflect 100% of jointly owned stations. 33 Duke Energy Progress Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information June 2025 Three Months Ended June 30, Six Months Ended June 30, 2025 2024 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) 2025 2024 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 3,886 3,912 (0.7 %) 9,766 9,044 8.0 % Commercial 3,695 3,619 2.1 % 7,435 7,251 2.5 % Industrial 2,375 2,328 2.0 % 4,832 4,551 6.2 % Other Energy Sales 21 21 — % 42 43 (2.3 %) Unbilled Sales 669 704 (5.0 %) (78) 183 (142.6 %) Total Retail Sales 10,646 10,584 0.6 % 0.4 % 21,997 21,072 4.4 % 1.3 % Wholesale and Other 6,412 6,630 (3.3 %) 13,246 12,270 8.0 % Total Consolidated Electric Sales – Duke Energy Progress 17,058 17,214 (0.9 %) 35,243 33,342 5.7 % Average Number of Customers Residential 1,523,129 1,495,566 1.8 % 1,520,911 1,491,114 2.0 % Commercial 249,001 248,278 0.3 % 248,667 247,992 0.3 % Industrial 3,043 3,213 (5.3 %) 3,057 3,226 (5.2 %) Other Energy Sales 2,391 2,440 (2.0 %) 2,399 2,446 (1.9 %) Total Retail Customers 1,777,564 1,749,497 1.6 % 1,775,034 1,744,778 1.7 % Wholesale and Other 8 9 (11.1 %) 8 8 — % Total Average Number of Customers – Duke Energy Progress 1,777,572 1,749,506 1.6 % 1,775,042 1,744,786 1.7 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 1,773 2,116 (16.2 %) 4,049 3,918 3.3 % Nuclear 7,887 7,056 11.8 % 15,024 14,303 5.0 % Hydro 179 168 6.5 % 317 429 (26.1 %) Natural Gas and Oil 4,996 5,656 (11.7 %) 11,515 10,773 6.9 % Renewable Energy 68 56 21.4 % 118 115 2.6 % Total Generation (d) 14,903 15,052 (1.0 %) 31,023 29,538 5.0 % Purchased Power and Net Interchange (e) 2,761 2,708 2.0 % 5,253 4,845 8.4 % Total Sources of Energy 17,664 17,760 (0.5 %) 36,276 34,383 5.5 % Less: Line Loss and Other 606 546 11.0 % 1,033 1,041 (0.8 %) Total GWh Sources 17,058 17,214 (0.9 %) 35,243 33,342 5.7 % Owned MW Capacity (c) Summer 12,585 12,567 Winter 13,880 13,770 Nuclear Capacity Factor (%) (f) 96 91 Heating and Cooling Degree Days Actual Heating Degree Days 83 96 (13.5 %) 1,606 1,369 17.3 % Cooling Degree Days 754 729 3.4 % 769 738 4.2 % Variance from Normal Heating Degree Days (51.7 %) (45.0 %) (7.5 %) (22.7 %) Cooling Degree Days 34.2 % 29.6 % 33.7 % 28.4 % (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) Statistics reflect 100% of jointly owned stations. 34 Duke Energy Florida Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information June 2025 Three Months Ended June 30, Six Months Ended June 30, 2025 2024 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) 2025 2024 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 5,622 5,539 1.5 % 10,240 9,910 3.3 % Commercial 3,964 4,019 (1.4 %) 7,366 7,344 0.3 % Industrial 851 848 0.4 % 1,634 1,680 (2.7 %) Other Energy Sales 7 7 — % 14 15 (6.7 %) Unbilled Sales 640 620 — % 515 547 (5.9 %) Total Retail Sales 11,084 11,033 0.5 % (1.4 %) 19,769 19,496 1.4 % (0.3 %) Wholesale and Other 642 829 (22.6 %) 1,025 1,205 (14.9 %) Total Electric Sales – Duke Energy Florida 11,726 11,862 (1.1 %) 20,794 20,701 0.4 % Average Number of Customers Residential 1,815,652 1,789,071 1.5 % 1,813,649 1,785,483 1.6 % Commercial 212,623 211,119 0.7 % 212,229 210,708 0.7 % Industrial 1,580 1,682 (6.1 %) 1,598 1,699 (5.9 %) Other Energy Sales 3,538 3,616 (2.2 %) 3,550 3,624 (2.0 %) Total Retail Customers 2,033,393 2,005,488 1.4 % 2,031,026 2,001,514 1.5 % Wholesale and Other 12 13 (7.7 %) 13 13 — % Total Average Number of Customers – Duke Energy Florida 2,033,405 2,005,501 1.4 % 2,031,039 2,001,527 1.5 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 1,239 1,029 20.4 % 1,693 1,622 4.4 % Natural Gas and Oil 9,621 9,657 (0.4 %) 17,625 17,392 1.3 % Renewable Energy 1,007 874 15.2 % 1,736 1,404 23.6 % Total Generation (d) 11,867 11,560 2.7 % 21,054 20,418 3.1 % Purchased Power and Net Interchange (e) 343 645 (46.8 %) 451 898 (49.8 %) Total Sources of Energy 12,210 12,205 — % 21,505 21,316 0.9 % Less: Line Loss and Other 484 343 41.1 % 711 615 15.6 % Total GWh Sources 11,726 11,862 (1.1 %) 20,794 20,701 0.4 % Owned MW Capacity (c) Summer 10,855 10,791 Winter 12,515 12,483 Heating and Cooling Degree Days Actual Heating Degree Days — — — % 359 294 22.1 % Cooling Degree Days 1,261 1,207 4.5 % 1,476 1,436 2.8 % Variance from Normal Heating Degree Days (100.0 %) (100.0 %) (3.8 %) (22.4 %) Cooling Degree Days 17.8 % 13.8 % 15.2 % 13.3 % (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. 35 Duke Energy Ohio Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information June 2025 Three Months Ended June 30, Six Months Ended June 30, 2025 2024 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) 2025 2024 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 1,813 1,937 (6.4 %) 4,485 4,319 3.8 % Commercial 2,317 2,386 (2.9 %) 4,646 4,458 4.2 % Industrial 1,126 1,333 (15.5 %) 2,222 2,591 (14.2 %) Other Energy Sales 21 18 16.7 % 40 41 (2.4 %) Unbilled Sales 259 109 137.6 % 138 24 475.0 % Total Retail Sales 5,536 5,783 (4.3 %) (2.2 %) 11,531 11,433 0.9 % 0.2 % Wholesale and Other 135 127 6.3 % 247 257 (3.9 %) Total Electric Sales – Duke Energy Ohio 5,671 5,910 (4.0 %) 11,778 11,690 0.8 % Average Number of Customers Residential 837,594 831,819 0.7 % 837,735 830,951 0.8 % Commercial 76,391 75,968 0.6 % 76,453 75,871 0.8 % Industrial 2,051 2,220 (7.6 %) 2,076 2,234 (7.1 %) Other Energy Sales 2,605 2,792 (6.7 %) 2,629 2,796 (6.0 %) Total Retail Customers 918,641 912,799 0.6 % 918,893 911,852 0.8 % Wholesale and Other 1 1 — % 1 1 — % Total Average Number of Customers – Duke Energy Ohio 918,642 912,800 0.6 % 918,894 911,853 0.8 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 576 482 19.5 % 1,355 1,247 8.7 % Natural Gas and Oil 98 107 (8.4 %) 135 145 (6.9 %) Total Generation (d) 674 589 14.4 % 1,490 1,392 7.0 % Purchased Power and Net Interchange (e) 5,602 5,788 (3.2 %) 11,648 11,485 1.4 % Total Sources of Energy 6,276 6,377 (1.6 %) 13,138 12,877 2.0 % Less: Line Loss and Other 605 467 29.6 % 1,360 1,187 14.6 % Total GWh Sources 5,671 5,910 (4.0 %) 11,778 11,690 0.8 % Owned MW Capacity (c) Summer 1,080 1,080 Winter 1,173 1,173 Heating and Cooling Degree Days Actual Heating Degree Days 408 285 43.2 % 2,971 2,513 18.2 % Cooling Degree Days 344 453 (24.1 %) 351 453 (22.5 %) Variance from Normal Heating Degree Days (8.0 %) (36.2 %) (0.7 %) (17.2 %) Cooling Degree Days 1.8 % 33.8 % 3.1 % 32.7 % (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. 36 Duke Energy Indiana Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information June 2025 Three Months Ended June 30, Six Months Ended June 30, 2025 2024 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) 2025 2024 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 1,842 1,920 (4.1 %) 4,759 4,498 5.8 % Commercial 2,026 1,967 3.0 % 4,067 3,875 5.0 % Industrial 2,422 2,341 3.5 % 4,496 4,791 (6.2 %) Other Energy Sales 12 15 (20.0 %) 25 30 (16.7 %) Unbilled Sales 163 150 8.7 % 70 (289) 124.2 % Total Retail Sales 6,465 6,393 1.1 % 2.7 % 13,417 12,905 4.0 % 3.1 % Wholesale and Other 1,073 1,123 (4.5 %) 2,445 2,086 17.2 % Total Electric Sales – Duke Energy Indiana 7,538 7,516 0.3 % 15,862 14,991 5.8 % Average Number of Customers Residential 807,546 794,366 1.7 % 806,443 792,936 1.7 % Commercial 106,770 106,256 0.5 % 106,687 106,215 0.4 % Industrial 2,606 2,633 (1.0 %) 2,614 2,633 (0.7 %) Other Energy Sales 3,717 3,811 (2.5 %) 3,732 3,823 (2.4 %) Total Retail Customers 920,639 907,066 1.5 % 919,476 905,607 1.5 % Wholesale and Other 4 4 — % 4 4 — % Total Average Number of Customers – Duke Energy Indiana 920,643 907,070 1.5 % 919,480 905,611 1.5 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 2,659 3,662 (27.4 %) 7,212 6,976 3.4 % Hydro 57 70 (18.6 %) 114 138 (17.4 %) Natural Gas and Oil 1,067 1,343 (20.6 %) 2,180 2,432 (10.4 %) Renewable Energy 9 9 — % 14 15 (6.7 %) Total Generation (d) 3,792 5,084 (25.4 %) 9,520 9,561 (0.4 %) Purchased Power and Net Interchange (e) 4,076 2,941 38.6 % 7,144 6,775 5.4 % Total Sources of Energy 7,868 8,025 (2.0 %) 16,664 16,336 2.0 % Less: Line Loss and Other 330 509 (35.2 %) 802 1,345 (40.4 %) Total GWh Sources 7,538 7,516 0.3 % 15,862 14,991 5.8 % Owned MW Capacity (c) Summer 6,304 6,304 Winter 6,806 6,783 Heating and Cooling Degree Days Actual Heating Degree Days 430 316 36.1 % 3,161 2,677 18.1 % Cooling Degree Days 352 437 (19.5 %) 354 437 (19.0 %) Variance from Normal Heating Degree Days (12.3 %) (36.5 %) (2.2 %) (18.3 %) Cooling Degree Days 2.4 % 30.5 % 2.3 % 29.5 % (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. 37 Gas Utilities and Infrastructure Quarterly Highlights June 2025 Three Months Ended June 30, Six Months Ended June 30, 2025 2024 % Inc. (Dec.) 2025 2024 % Inc. (Dec.) Total Sales Piedmont Natural Gas Local Distribution Company (LDC) throughput (dekatherms) (a) 125,745,045 128,266,775 (2.0 %) 307,204,892 291,531,790 5.4 % Duke Energy Midwest LDC throughput (Mcf) (a) 13,882,749 12,969,694 7.0 % 54,338,433 46,167,345 17.7 % Average Number of Customers – Piedmont Natural Gas Residential 1,090,225 1,072,502 1.7 % 1,091,561 1,072,450 1.8 % Commercial 109,004 108,106 0.8 % 109,426 108,330 1.0 % Industrial 940 942 (0.2 %) 943 943 — % Power Generation 19 19 — % 19 19 — % Total Average Number of Gas Customers – Piedmont Natural Gas 1,200,188 1,181,569 1.6 % 1,201,949 1,181,742 1.7 % Average Number of Customers – Duke Energy Midwest Residential 523,704 521,839 0.4 % 525,151 523,086 0.4 % Commercial 34,119 34,112 — % 34,702 34,741 (0.1 %) Industrial 2,200 2,193 0.3 % 2,267 2,221 2.1 % Other 117 116 0.9 % 117 117 — % Total Average Number of Gas Customers – Duke Energy Midwest 560,140 558,260 0.3 % 562,237 560,165 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. 38

the item shown at left

other guidance in this release

Text is the filed exhibit, verbatim.