News Release Media Contact: Gillian Moore 24-Hour: 800.559.3853 Analyst Contact: Mike Switzer Office: 704.382.6473 May 5, 2026 Duke Energy reports first-quarter 2026 financial results ▪ First-quarter 2026 reported EPS of $1.97 and adjusted EPS of $1.93 ▪ Seizing growth opportunities with a total of 7.6 GW of economic development projects secured under Electric Service Agreements ▪ Successfully closed $5.3 billion strategic transactions to strengthen balance sheet and support growth CHARLOTTE, N.C. – Duke Energy (NYSE: DUK) today announced first-quarter 2026 reported EPS of $1.97, prepared in accordance with Generally Accepted Accounting Principles (GAAP), and adjusted EPS of $1.93. This is compared to reported and adjusted EPS of $1.76 for the first quarter of 2025. Adjusted EPS excludes the impact of certain items that are included in reported EPS. The difference between first-quarter 2026 reported and adjusted EPS includes gains on asset sales, charges related to legal and regulatory settlements, and results of discontinued operations. Higher first-quarter 2026 adjusted results were driven by recovery of infrastructure investments to reliably serve customers in our growing jurisdictions, along with favorable weather. These items were partially offset by higher O&M expenses, including storm costs, as well as higher depreciation on a growing asset base. 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’re advancing the economies of the states we serve by making the right investments at the right time in a way that delivers value for our customers and communities,” said Harry Sideris, Duke Energy president and chief executive officer. “From maximizing our existing fleet, to constructing new generation and strengthening the grid, we’re executing today and building for the future – all while pursuing solutions to keep rates as low as possible.” 1 Duke Energy News Release 2 Business segment results In addition to the following summary of first-quarter 2026 business segment performance, comprehensive tables with detailed EPS drivers for the first quarter compared to prior year are provided at the end of this news release. The discussion below of first-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 first-quarter 2026 segment income of $1,254 million, compared to segment income of $1,276 million in the first quarter of 2025. In addition to the drivers outlined below, first-quarter 2026 results include the impact of charges related to legal and regulatory settlements at Duke Energy Carolinas and Duke Energy Progress, which were treated as special items and excluded from adjusted earnings. On an adjusted basis, Electric Utilities and Infrastructure recognized first-quarter 2026 segment income of $1,404 million, compared to segment income of $1,276 million in the first quarter of 2025. This represents an increase of $0.16 per share. Higher quarterly results were primarily driven by recovery of infrastructure investments to reliably serve customers in our growing jurisdictions, along with favorable weather, partially offset by higher O&M expenses, including storm costs, along with higher depreciation on a growing asset base. Gas Utilities and Infrastructure On a reported basis, Gas Utilities and Infrastructure recognized first-quarter 2026 segment income of $532 million, compared to segment income of $349 million in the first quarter of 2025. In addition to the drivers outlined below, first-quarter 2026 results include the impact of gains on asset sales related to Piedmont's Tennessee business and SustainRNG projects, which were treated as special items and excluded from adjusted earnings. On an adjusted basis, Gas Utilities and Infrastructure recognized first-quarter 2026 segment income of $361 million, compared to segment income of $349 million in the first quarter of 2025. This represents an increase of $0.01 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 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 first-quarter 2026 segment loss of $263 million, compared to segment loss of $260 million in the first quarter of 2025. 2 Duke Energy News Release 3 Effective tax rate Duke Energy's consolidated reported effective tax rate for the first quarter of 2026 was 17.6% compared to 12.1% in the first quarter of 2025. The increase in the reported effective tax rate was primarily due to non-deductible goodwill associated with the sale of Piedmont's Tennessee business. Duke Energy's consolidated adjusted effective tax rate was 10.6% for the first quarter of 2026 compared to 12.2% in the first quarter of 2025. The decrease in the adjusted effective tax rate was primarily due to an increase in the amortization of nuclear production tax credits. 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 first-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 dialing 585.542.9983 in the U.S. or 833.461.5787 outside the U.S. The confirmation code is 939851751. 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 first-quarter 2026 and 2025 financial results: (In millions, except per share amounts) After-Tax Amount 1Q 2026 EPS 1Q 2025 EPS EPS, as reported $ 1.97 $ 1.76 Adjustments to reported EPS: First Quarter 2026 Legal and Regulatory Settlements $ 150 $ 0.19 Asset Sales (171) (0.22) Discontinued Operations (13) (0.02) Total adjustments (a) $ (0.04) $ — EPS, adjusted $ 1.93 $ 1.76 (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: • Legal and Regulatory Settlements represent the impact of charges related to legal settlements as well as regulatory matters related to the establishment of a regulatory liability associated with an energy efficiency program at Duke Energy Carolinas and Duke Energy Progress. • Asset Sales represent the impact of gains on sale of assets related to Piedmont's Tennessee business and certain renewable natural gas investments. 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. 4 Duke Energy News Release 5 Management evaluates segment performance based on segment income and other net loss. Segment income and other net loss are defined as income (loss) from continuing operations net of income attributable to noncontrolling interests and preferred stock dividends. Segment income and other net loss include intercompany revenues and expenses that are eliminated in the Condensed Consolidated Financial Statements. Management also uses adjusted segment income and adjusted other net loss as measures of historical and anticipated future segment performance. Adjusted segment income and adjusted other net loss are non-GAAP financial measures, as they represent segment income and other net loss adjusted for special items, as discussed above. Management believes the presentation of adjusted segment income and adjusted other net loss provide useful information to investors, as they provide additional relevant comparison of a segment’s or Other's performance across periods. The most directly comparable GAAP measures for adjusted segment income and adjusted other net loss are segment income and other net loss. Due to the forward-looking nature of forecasted adjusted segment income and forecasted adjusted other net loss and related growth rates, the information to reconcile these amounts to the most directly comparable GAAP financial measures are not available, as management is unable to project special items, as discussed above. Duke Energy’s adjusted earnings, adjusted EPS, adjusted effective tax rate, adjusted segment income, and adjusted other net loss may not be comparable to similarly titled measures of another company because other companies may not calculate the measures in the same manner. Duke Energy Duke Energy (NYSE: DUK), a Fortune 150 company headquartered in Charlotte, N.C., is one of America’s largest energy holding companies. The company's electric utilities serve 8.7 million customers in North Carolina, South Carolina, Florida, Indiana, Ohio and Kentucky, and collectively own 55,700 megawatts of energy capacity. Its natural gas utilities serve 1.6 million customers in North Carolina, South Carolina, Ohio and Kentucky. Duke Energy is executing an energy modernization strategy, keeping customer value at the forefront as it invests in electric grid upgrades and efficient generation resources to strengthen the system and serve growing energy needs. More information is available at duke-energy.com. Follow Duke Energy on X, LinkedIn, Instagram, TikTok and Facebook for stories about the people and innovations powering its communities. Forward-Looking Information This document includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Forward-looking statements are based on management’s beliefs and assumptions and can often be identified by terms and phrases that include “anticipate,” “believe,” “intend,” “estimate,” “expect,” “continue,” “should,” “could,” “may,” “plan,” “project,” “predict,” “will,” “potential,” “forecast,” “target,” “guidance,” “outlook” or other similar terminology. Various factors may cause actual results to be materially different than the suggested outcomes within forward-looking statements; accordingly, there is no assurance that such results will be realized. These factors include, but are not limited to: 5 Duke Energy News Release 6 ◦ The ability to implement our business strategy, including meeting forecasted load growth demand, grid and fleet modernization objectives, and reducing carbon emissions, while balancing customer reliability and keeping costs as low as possible for our customers; ◦ State, federal and foreign legislative and regulatory initiatives, including costs of compliance with existing and future environmental requirements and/or uncertainty of applicability or changes to such legislative and regulatory initiatives, including those related to climate change, as well as rulings that affect cost and investment recovery or have an impact on rate structures or market prices; ◦ The extent and timing of costs and liabilities to comply with federal and state laws, regulations and legal requirements related to coal ash remediation, including amounts for required closure of certain ash impoundments, are uncertain and difficult to estimate; ◦ The ability to timely recover eligible costs, including amounts associated with coal ash impoundment retirement obligations, asset retirement and construction costs related to carbon emissions reductions, and costs related to significant weather events, particularly in periods of heightened customer affordability concerns, bill volatility, or public and political scrutiny, and to earn an adequate return on investment through rate case proceedings and the regulatory process; ◦ The costs 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; 6 Duke Energy News Release 7 ◦ The timing and extent of changes in commodity prices, including any impact from increased tariffs, export controls and interest rates, and the ability to timely recover such costs through the regulatory process, where appropriate, and their impact on liquidity positions and the value of underlying assets; ◦ The results of financing efforts, including the ability to obtain financing on favorable terms, which can be affected by various factors, including credit ratings, interest rate fluctuations, compliance with debt covenants and conditions, an individual utility’s generation portfolio, and general market and economic conditions; ◦ Credit ratings of the Duke Energy Registrants may be different from what is expected; ◦ Declines in the market prices of equity and fixed-income securities and resultant cash funding requirements for defined benefit pension plans, other post-retirement benefit plans and nuclear decommissioning trust funds; ◦ Construction and development risks associated with the completion of the Duke Energy Registrants’ capital investment projects, including risks related to financing, timing and receipt of necessary regulatory approvals, obtaining and complying with terms of permits, meeting construction budgets and schedules, obtaining sufficient skilled labor and satisfying operating and environmental performance standards, as well as the ability to recover costs from customers in a timely manner, or at all; ◦ Changes in rules for regional transmission organizations, including changes in rate designs and new and evolving capacity markets, and risks related to obligations created by the default of other participants; ◦ The ability to control operation and maintenance costs; ◦ The level of creditworthiness of counterparties to transactions; ◦ The ability to obtain adequate insurance at acceptable costs and recover on claims made; ◦ Employee workforce factors, including the potential inability to attract and retain key personnel; ◦ The ability of subsidiaries to pay dividends or distributions to Duke Energy Corporation holding company (the Parent); ◦ The performance of projects undertaken by our businesses and the success of efforts to invest in and develop new opportunities; ◦ The effect of accounting and reporting pronouncements issued periodically by accounting standard-setting bodies and the SEC; ◦ The impact of United States tax legislation to our financial condition, results of operations or cash flows and our credit ratings; ◦ The impacts from potential impairments of goodwill or investment carrying values; ◦ Asset or business acquisitions and dispositions may not be consummated or yield the anticipated benefits, which could adversely affect our financial condition, credit metrics or ability to execute strategic and capital plans; 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 March 31, 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 $ 1,254 $ 150 A $ — $ — $ 150 $ 1,404 Gas Utilities and Infrastructure 532 — (171) B — (171) 361 Total Reportable Segment Income 1,786 150 (171) — (21) 1,765 Other (263) — — — (263) Discontinued Operations 13 — — (13) C (13) — Net Income Available to Duke Energy Corporation Common Stockholders $ 1,536 $ 150 $ (171) $ (13) $ (34) $ 1,502 EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 1.97 $ 0.19 $ (0.22) $ (0.02) $ (0.04) $ 1.93 Note: Total EPS adjustments do not cross-foot due to rounding. A – $197 million total pretax recorded at Duke Energy Carolinas and Duke Energy Progress within Operations, maintenance and other and Operating Revenues on the Condensed Consolidated Statements of Operations for legal settlements as well as regulatory matters related to the establishment of a regulatory liability associated with an energy efficiency program. The segment income amount for these items are net of a $47 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 from Discontinued Operations, net of tax, on the Condensed Consolidated Statements of Operations. Weighted Average Shares, basic (reported and adjusted) – 778 million 8 DUKE ENERGY CORPORATION REPORTED TO ADJUSTED EARNINGS RECONCILIATION Three Months Ended March 31, 2025 (Dollars in millions, except per share amounts) Reported Earnings Discontinued Operations Total Adjustments Adjusted Earnings SEGMENT INCOME (LOSS) Electric Utilities and Infrastructure $ 1,276 $ — $ — $ 1,276 Gas Utilities and Infrastructure 349 — — 349 Total Reportable Segment Income 1,625 — — 1,625 Other (260) — — (260) Net Income Available to Duke Energy Corporation Common Stockholders $ 1,365 $ — $ — $ 1,365 EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 1.76 $ — $ 1.76 Weighted Average Shares, basic (reported and adjusted) – 777 million 9 DUKE ENERGY CORPORATION EFFECTIVE TAX RECONCILIATION March 2026 (Dollars in millions) Three Months Ended March 31, 2026 Balance Effective Tax Rate Reported Income From Continuing Operations Before Income Taxes $ 1,897 Legal and Regulatory Settlements 197 Asset Sales (367) Noncontrolling Interests (32) Preferred Dividends (14) Adjusted Pretax Income $ 1,681 Reported Income Tax Expense From Continuing Operations $ 333 17.6 % Legal and Regulatory Settlements 47 Asset Sales (196) Noncontrolling Interest Portion of Income Taxes (a) (5) Adjusted Tax Expense $ 179 10.6 % Three Months Ended March 31, 2025 Balance Effective Tax Rate Reported Income From Continuing Operations Before Income Taxes $ 1,597 Noncontrolling Interests (28) Preferred Dividends (14) Adjusted Pretax Income $ 1,555 Reported Income Tax Expense From Continuing Operations $ 193 12.1 % Noncontrolling Interest Portion of Income Taxes (a) (3) Adjusted Tax Expense $ 190 12.2 % (a) Income tax related to non-pass-through entities for tax purposes. 10 DUKE ENERGY CORPORATION EARNINGS VARIANCES March 2026 YTD vs. Prior Year (Dollars per share) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Consolidated 2025 YTD Reported and Adjusted Earnings Per Share $ 1.64 $ 0.45 $ (0.33) $ 1.76 Weather 0.04 — — 0.04 Volume (a) 0.03 — — 0.03 Riders and Other Retail Margin (b) 0.10 0.03 — 0.13 Rate case impacts, net (c) 0.13 0.01 — 0.14 Wholesale 0.01 — — 0.01 Operations and maintenance, net of recoverables (d) (0.08) (0.01) — (0.09) Interest Expense (0.02) — (0.03) (0.05) AFUDC Equity 0.02 — — 0.02 Depreciation and amortization (e) (0.08) (0.01) — (0.09) Other 0.01 (0.01) 0.03 0.03 Total variance $ 0.16 $ 0.01 $ — $ 0.17 2026 YTD Adjusted Earnings Per Share $ 1.80 $ 0.46 $ (0.33) $ 1.93 Legal and Regulatory Settlements (0.19) — — (0.19) Asset Sales — 0.22 — 0.22 Discontinued Operations — — 0.02 0.02 2026 YTD Reported Earnings Per Share $ 1.61 $ 0.68 $ (0.31) $ 1.97 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 778 million. Totals may not foot or cross-foot due to rounding. (a) Includes block and seasonal pricing. (b) Electric Utilities and Infrastructure includes transmission revenues and higher grid modernization riders. Gas Utilities and Infrastructure includes customer growth in North Carolina and South Carolina. (c) Electric Utilities and Infrastructure includes impacts from DEI rates, effective February 2025 (+$0.04), DEC North Carolina Year 3 rates, effective January 2026, and DEC South Carolina rates, effective March 2026 (+$0.03), DEF Year 2 rates, effective January 2026 (+$0.03) 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). Gas Utilities and Infrastructure includes impacts from DEK rates, effective January 2026. (d) Electric Utilities and Infrastructure includes higher storm costs (-$0.04), increased environmental reserves, and higher grid maintenance and generation outage costs in the current year. (e) Electric Utilities and Infrastructure excludes rate case impacts. 11 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (In millions, except per share amounts) Three Months Ended March 31, 2026 2025 Operating Revenues Regulated electric $ 7,803 $ 7,064 Regulated natural gas 1,297 1,105 Nonregulated electric and other 78 80 Total operating revenues 9,178 8,249 Operating Expenses Fuel used in electric generation and purchased power 2,419 2,099 Cost of natural gas 525 374 Operation, maintenance and other 1,752 1,499 Depreciation and amortization 1,689 1,512 Property and other taxes 452 428 Total operating expenses 6,837 5,912 Gains on Sales of Other Assets and Other, net 384 6 Operating Income 2,725 2,343 Other Income and Expenses Equity in earnings of unconsolidated affiliates 7 11 Other income and expenses, net 133 132 Total other income and expenses 140 143 Interest Expense 968 889 Income From Continuing Operations Before Income Taxes 1,897 1,597 Income Tax Expense From Continuing Operations 333 193 Income From Continuing Operations 1,564 1,404 Income From Discontinued Operations, net of tax 13 — Net Income 1,577 1,404 Less: Net Income Attributable to Noncontrolling Interests 27 25 Net Income Attributable to Duke Energy Corporation 1,550 1,379 Less: Preferred Dividends 14 14 Net Income Available to Duke Energy Corporation Common Stockholders $ 1,536 $ 1,365 Earnings Per Share – Basic and Diluted Income from continuing operations available to Duke Energy Corporation common stockholders Basic and Diluted $ 1.95 $ 1.76 Income 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 $ 1.97 $ 1.76 Weighted average shares outstanding Basic 778 777 Diluted 779 777 12 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (In millions) March 31, 2026 December 31, 2025 ASSETS Current Assets Cash and cash equivalents $ 2,140 $ 245 Receivables (net of allowance for doubtful accounts of $201 at 2026 and $194 at 2025) 3,947 4,230 Inventory (includes $1,062 at 2026 and $669 at 2025 related to VIEs) 4,572 4,569 Regulatory assets (includes $204 at 2026 and 2025 related to VIEs) 2,201 1,934 Assets held for sale — 109 Other (includes $82 at 2026 and $88 at 2025 related to VIEs) 586 526 Total current assets 13,446 11,613 Property, Plant and Equipment Cost 193,525 190,409 Accumulated depreciation and amortization (61,252) (60,450) Net property, plant and equipment 132,273 129,959 Other Noncurrent Assets Goodwill 19,010 19,010 Regulatory assets (includes $3,062 at 2026 and $3,108 at 2025 related to VIEs) 15,059 14,379 Nuclear decommissioning trust funds 12,644 12,889 Operating lease right-of-use assets, net 1,169 1,241 Investments in equity method unconsolidated affiliates 328 330 Assets held for sale — $ 2,148 Other 4,119 4,167 Total other noncurrent assets 52,329 54,164 Total Assets $ 198,048 $ 195,736 LIABILITIES AND EQUITY Current Liabilities Accounts payable (includes $376 at 2026 and $296 at 2025 related to VIEs) $ 4,732 $ 5,223 Notes payable and commercial paper 2,373 2,624 Taxes accrued 839 975 Interest accrued 816 922 Current maturities of long-term debt (includes $147 at 2026 and $118 at 2025 related to VIEs) 7,395 7,104 Asset retirement obligations 574 579 Regulatory liabilities 1,554 1,271 Liabilities associated with assets held for sale — 84 Other 2,051 2,265 Total current liabilities 20,334 21,047 Long-Term Debt (includes $3,222 at 2026 and $3,308 at 2025 related to VIEs) 80,477 80,108 Other Noncurrent Liabilities Deferred income taxes 12,799 12,377 Asset retirement obligations 9,036 9,046 Regulatory liabilities 14,774 15,682 Operating lease liabilities 964 1,033 Accrued pension and other post-retirement benefit costs 384 396 Investment tax credits 985 969 Liabilities associated with assets held for sale — $ 170 Other 1,817 1,889 Total other noncurrent liabilities 40,759 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; 778 million shares outstanding at 2026 and 2025 1 1 Additional paid-in capital 47,551 45,614 Retained earnings 5,761 5,056 Accumulated other comprehensive income 171 198 Total Duke Energy Corporation stockholders' equity 54,457 51,842 Noncontrolling interests 2,021 1,177 Total equity 56,478 53,019 Total Liabilities and Equity $ 198,048 $ 195,736 13 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (In millions) Three Months Ended March 31, 2026 2025 CASH FLOWS FROM OPERATING ACTIVITIES Net Income $ 1,577 $ 1,404 Adjustments to reconcile net income to net cash provided by operating activities (65) 773 Net cash provided by operating activities 1,512 2,177 CASH FLOWS FROM INVESTING ACTIVITIES Net cash used in investing activities (1,846) (3,300) CASH FLOWS FROM FINANCING ACTIVITIES Net cash provided by financing activities 2,223 1,238 Net increase in cash, cash equivalents and restricted cash 1,889 115 Cash, cash equivalents and restricted cash at beginning of period 363 421 Cash, cash equivalents and restricted cash at end of period $ 2,252 $ 536 14 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited) Three Months Ended March 31, 2026 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Eliminations/Adjustments Duke Energy Operating Revenues Regulated electric $ 7,817 $ — $ — $ (14) $ 7,803 Regulated natural gas — 1,321 — (24) 1,297 Nonregulated electric and other 61 12 42 (37) 78 Total operating revenues 7,878 1,333 42 (75) 9,178 Operating Expenses Fuel used in electric generation and purchased power 2,440 — — (21) 2,419 Cost of natural gas — 525 — — 525 Operation, maintenance and other 1,709 135 (41) (51) 1,752 Depreciation and amortization 1,498 115 83 (7) 1,689 Property and other taxes 393 57 2 — 452 Total operating expenses 6,040 832 44 (79) 6,837 Gains on Sales of Other Assets and Other, net 5 374 5 — 384 Operating Income 1,843 875 3 4 2,725 Other Income and Expenses Equity in earnings of unconsolidated affiliates — 6 1 — 7 Other income and expenses, net 136 12 8 (23) 133 Total Other Income and Expenses 136 18 9 (23) 140 Interest Expense 571 67 349 (19) 968 Income (Loss) from Continuing Operations before Income Taxes 1,408 826 (337) — 1,897 Income Tax Expense (Benefit) from Continuing Operations 127 294 (88) — 333 Income (Loss) from Continuing Operations 1,281 532 (249) — 1,564 Less: Net Income Attributable to Noncontrolling Interest 27 — — — 27 Net Income (Loss) Attributable to Duke Energy Corporation 1,254 532 (249) — 1,537 Less: Preferred Dividends — — 14 — 14 Segment Income/Other Net Loss $ 1,254 $ 532 $ (263) $ — $ 1,523 Discontinued Operations 13 Net Income Available to Duke Energy Corporation Common Stockholders $ 1,536 Segment Income/Other Net Loss $ 1,254 $ 532 $ (263) $ — $ 1,523 Special Items 150 (171) — — (21) Adjusted Earnings (a) $ 1,404 $ 361 $ (263) $ — $ 1,502 (a) See Reported to Adjusted Earnings Reconciliation for a detailed reconciliation of Segment Income/Other Net Loss to Adjusted Earnings. 15 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited) Three Months Ended March 31, 2025 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Eliminations/Adjustments Duke Energy Operating Revenues Regulated electric $ 7,079 $ — $ — $ (15) $ 7,064 Regulated natural gas — 1,129 — (24) 1,105 Nonregulated electric and other 61 11 42 (34) 80 Total operating revenues 7,140 1,140 42 (73) 8,249 Operating Expenses Fuel used in electric generation and purchased power 2,119 — — (20) 2,099 Cost of natural gas — 374 — — 374 Operation, maintenance and other 1,424 125 2 (52) 1,499 Depreciation and amortization 1,334 107 77 (6) 1,512 Property and other taxes 378 47 3 — 428 Total operating expenses 5,255 653 82 (78) 5,912 Gains on Sales of Other Assets and Other, net 1 — 5 — 6 Operating Income (Loss) 1,886 487 (35) 5 2,343 Other Income and Expenses Equity in earnings of unconsolidated affiliates — 5 6 — 11 Other income and expenses, net 134 13 14 (29) 132 Total Other Income and Expenses 134 18 20 (29) 143 Interest Expense 530 65 318 (24) 889 Income (Loss) From Continuing Operations Before Income Taxes 1,490 440 (333) — 1,597 Income Tax Expense (Benefit) from Continuing Operations 189 91 (87) — 193 Income (Loss) from Continuing Operations 1,301 349 (246) — 1,404 Less: Net Income Attributable to Noncontrolling Interest 25 — — — 25 Net Income (Loss) Attributable to Duke Energy Corporation 1,276 349 (246) — 1,379 Less: Preferred Dividends — — 14 — 14 Segment Income/Other Net Loss $ 1,276 $ 349 $ (260) $ — $ 1,365 Discontinued Operations — Net Income Available to Duke Energy Corporation Common Stockholders $ 1,365 16 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS (Unaudited) March 31, 2026 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Eliminations/ Adjustments Duke Energy Current Assets Cash and cash equivalents $ 158 $ 16 $ 1,966 $ — $ 2,140 Receivables, net 3,559 385 2 1 3,947 Receivables from affiliated companies 181 79 1,334 (1,594) — Notes receivable from affiliated companies 87 279 1,083 (1,449) — Inventory 4,479 59 35 (1) 4,572 Regulatory assets 1,937 180 85 (1) 2,201 Other 640 19 28 (101) 586 Total current assets 11,041 1,017 4,533 (3,145) 13,446 Property, Plant and Equipment Cost 174,578 16,758 2,261 (72) 193,525 Accumulated depreciation and amortization (56,825) (3,503) (924) — (61,252) Net property, plant and equipment 117,753 13,255 1,337 (72) 132,273 Other Noncurrent Assets Goodwill 17,380 1,630 — — 19,010 Regulatory assets 13,904 688 467 — 15,059 Nuclear decommissioning trust funds 12,644 — — — 12,644 Operating lease right-of-use assets, net 702 2 465 — 1,169 Investments in equity method unconsolidated affiliates 1 183 145 (1) 328 Investment in consolidated subsidiaries 563 5 80,005 (80,573) — Other 2,586 332 1,825 (624) 4,119 Total other noncurrent assets 47,780 2,840 82,907 (81,198) 52,329 Total Assets 176,574 17,112 88,777 (84,415) 198,048 Segment reclassifications, intercompany balances and other (1,001) (367) (83,047) 84,415 — Segment Assets $ 175,573 $ 16,745 $ 5,730 $ — $ 198,048 17 DUKE ENERGY CORPORATION CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY (Unaudited) March 31, 2026 (In millions) Electric Utilities and Infrastructure Gas Utilities and Infrastructure Other Eliminations/ Adjustments Duke Energy Current Liabilities Accounts payable $ 3,695 $ 315 $ 722 $ — $ 4,732 Accounts payable to affiliated companies 829 68 565 (1,462) — Notes payable to affiliated companies 1,254 23 172 (1,449) — Notes payable and commercial paper — — 2,373 — 2,373 Taxes accrued 655 583 (399) — 839 Interest accrued 522 58 237 (1) 816 Current maturities of long-term debt 3,508 57 3,837 (7) 7,395 Asset retirement obligations 574 — — — 574 Regulatory liabilities 1,470 84 — — 1,554 Other 1,597 72 615 (233) 2,051 Total current liabilities 14,104 1,260 8,122 (3,152) 20,334 Long-Term Debt 50,547 4,717 25,278 (65) 80,477 Long-Term Debt Payable to Affiliated Companies 618 7 — (625) — Other Noncurrent Liabilities Deferred income taxes 12,715 1,391 (1,311) 4 12,799 Asset retirement obligations 8,944 93 — (1) 9,036 Regulatory liabilities 13,727 1,019 28 — 14,774 Operating lease liabilities 629 1 334 — 964 Accrued pension and other post-retirement benefit costs (28) 31 381 — 384 Investment tax credits 985 1 — (1) 985 Other 1,307 116 581 (187) 1,817 Total other noncurrent liabilities 38,279 2,652 13 (185) 40,759 Equity Total Duke Energy Corporation stockholders' equity 71,007 8,473 55,364 (80,387) 54,457 Noncontrolling interests 2,019 3 — (1) 2,021 Total equity 73,026 8,476 55,364 (80,388) 56,478 Total Liabilities and Equity 176,574 17,112 88,777 (84,415) 198,048 Segment reclassifications, intercompany balances and other (1,001) (367) (83,047) 84,415 — Segment Liabilities and Equity $ 175,573 $ 16,745 $ 5,730 $ — $ 198,048 18 ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Three Months Ended March 31, 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 $ 2,766 $ 2,301 $ 1,621 $ 562 $ 966 $ (338) $ 7,878 Operating Expenses Fuel used in electric generation and purchased power 931 863 448 173 370 (345) 2,440 Operation, maintenance and other 601 501 319 97 187 4 1,709 Depreciation and amortization 526 386 296 82 205 3 1,498 Property and other taxes 106 59 123 87 19 (1) 393 Total operating expenses 2,164 1,809 1,186 439 781 (339) 6,040 Gains on Sales of Other Assets and Other, net 2 1 2 — — — 5 Operating Income 604 493 437 123 185 1 1,843 Other Income and Expenses, net (b) 63 43 15 4 11 — 136 Interest Expense 217 135 127 34 64 (6) 571 Income Before Income Taxes 450 401 325 93 132 7 1,408 Income Tax Expense 14 42 65 16 19 (29) 127 Less: Net Income Attributable to Noncontrolling Interest (c) — — — — — 27 27 Segment Income $ 436 $ 359 $ 260 $ 77 $ 113 $ 9 $ 1,254 (a) Includes results of the wholly owned subsidiary, Duke Energy Kentucky. (b) Includes an equity component of allowance for funds used during construction of $41 million for Duke Energy Carolinas, $27 million for Duke Energy Progress, $3 million for Duke Energy Florida, $3 million for Duke Energy Ohio and $9 million for Duke Energy Indiana. (c) Includes a noncontrolling interest in Duke Energy Indiana and Florida Progress. 19 ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS (Unaudited) March 31, 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 $ 44 $ 63 $ 17 $ 15 $ 18 $ 1 $ 158 Receivables, net 1,198 967 524 394 469 7 3,559 Receivables from affiliated companies 251 35 47 27 24 (203) 181 Notes receivable from affiliated companies — — — 29 239 (181) 87 Inventory 1,544 1,350 850 185 550 — 4,479 Regulatory assets 752 675 286 28 198 (2) 1,937 Other 256 188 116 1 86 (7) 640 Total current assets 4,045 3,278 1,840 679 1,584 (385) 11,041 Property, Plant and Equipment Cost 63,715 45,974 33,739 9,568 21,514 68 174,578 Accumulated depreciation and amortization (20,863) (17,179) (8,643) (2,586) (7,604) 50 (56,825) Net property, plant and equipment 42,852 28,795 25,096 6,982 13,910 118 117,753 Other Noncurrent Assets Goodwill — — — 596 — 16,784 17,380 Regulatory assets 5,177 4,629 2,130 358 1,009 601 13,904 Nuclear decommissioning trust funds 7,213 5,156 275 — — — 12,644 Operating lease right-of-use assets, net 92 368 206 5 32 (1) 702 Investments in equity method unconsolidated affiliates — — 1 — — — 1 Investment in consolidated subsidiaries 56 10 4 493 1 (1) 563 Other 1,336 788 585 70 240 (433) 2,586 Total other noncurrent assets 13,874 10,951 3,201 1,522 1,282 16,950 47,780 Total Assets 60,771 43,024 30,137 9,183 16,776 16,683 176,574 Segment reclassifications, intercompany balances and other (339) (140) (82) (552) (272) 384 (1,001) Reportable Segment Assets $ 60,432 $ 42,884 $ 30,055 $ 8,631 $ 16,504 $ 17,067 $ 175,573 (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. 20 ELECTRIC UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY (Unaudited) March 31, 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 $ 1,539 $ 962 $ 639 $ 201 $ 348 $ 6 $ 3,695 Accounts payable to affiliated companies 353 370 139 18 90 (141) 829 Notes payable to affiliated companies 638 644 107 46 — (181) 1,254 Taxes accrued 124 66 99 289 108 (31) 655 Interest accrued 163 91 142 44 81 1 522 Current maturities of long-term debt 1,649 793 1,087 (17) 4 (8) 3,508 Asset retirement obligations 242 186 2 6 138 — 574 Regulatory liabilities 660 356 152 43 259 — 1,470 Other 634 342 337 70 218 (4) 1,597 Total current liabilities 6,002 3,810 2,704 700 1,246 (358) 14,104 Long-Term Debt 17,839 12,917 10,465 3,492 5,436 398 50,547 Long-Term Debt Payable to Affiliated Companies 300 150 — 18 150 — 618 Other Noncurrent Liabilities Deferred income taxes 4,327 2,786 3,121 888 1,537 56 12,715 Asset retirement obligations 3,598 4,113 180 62 979 12 8,944 Regulatory liabilities 7,333 4,245 775 237 1,164 (27) 13,727 Operating lease liabilities 79 366 154 4 26 — 629 Accrued pension and other post-retirement benefit costs 23 138 86 65 76 (416) (28) Investment tax credits 353 197 248 5 182 — 985 Other 750 338 162 56 13 (12) 1,307 Total other noncurrent liabilities 16,463 12,183 4,726 1,317 3,977 (387) 38,279 Equity Total Duke Energy Corporation stockholders equity 20,167 13,964 12,242 3,656 5,967 15,011 71,007 Noncontrolling interests (c) — — — — — 2,019 2,019 Total equity 20,167 13,964 12,242 3,656 5,967 17,030 73,026 Total Liabilities and Equity 60,771 43,024 30,137 9,183 16,776 16,683 176,574 Segment reclassifications, intercompany balances and other (339) (140) (82) (552) (272) 384 (1,001) Reportable Segment Liabilities and Equity $ 60,432 $ 42,884 $ 30,055 $ 8,631 $ 16,504 $ 17,067 $ 175,573 (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. 21 GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING SEGMENT INCOME (Unaudited) Three Months Ended March 31, 2026 (In millions) Duke Energy Ohio (a) Piedmont Natural Gas LDC Midstream Pipelines and Storage (b) Eliminations/ Adjustments Gas Utilities and Infrastructure Operating Revenues $ 317 $ 1,011 $ 5 $ — $ 1,333 Operating Expenses Cost of natural gas 121 404 — — 525 Operation, maintenance and other 40 93 — 2 135 Depreciation and amortization 39 74 3 (1) 115 Property and other taxes 30 26 2 (1) 57 Total operating expenses 230 597 5 — 832 Gains on Sales of Other Assets and Other, net (c) — 652 6 (284) 374 Operating Income 87 1,066 6 (284) 875 Other Income and Expenses, net Equity in earnings of unconsolidated affiliates — — 6 — 6 Other income and expenses, net 1 10 — 1 12 Other Income and Expenses, net 1 10 6 1 18 Interest Expense 18 48 1 — 67 Income Before Income Taxes 70 1,028 11 (283) 826 Income Tax Expense 15 258 20 1 294 Segment Income $ 55 $ 770 $ (9) $ (284) $ 532 (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. 22 GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS (Unaudited) March 31, 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 $ 6 $ 5 $ 4 $ 1 $ 16 Receivables, net 75 310 — — 385 Receivables from affiliated companies — 84 90 (95) 79 Notes receivable from affiliated companies 16 266 — (3) 279 Inventory 14 45 — — 59 Regulatory assets 94 85 — 1 180 Other 8 10 4 (3) 19 Total current assets 213 805 98 (99) 1,017 Property, Plant and Equipment Cost 5,202 11,481 75 — 16,758 Accumulated depreciation and amortization (1,271) (2,217) (15) — (3,503) Net property, plant and equipment 3,931 9,264 60 — 13,255 Other Noncurrent Assets Goodwill 324 39 — 1,267 1,630 Regulatory assets 328 306 — 54 688 Operating lease right-of-use assets, net — 2 — — 2 Investments in equity method unconsolidated affiliates — — 178 5 183 Investment in consolidated subsidiaries — — — 5 5 Other 31 284 16 1 332 Total other noncurrent assets 683 631 194 1,332 2,840 Total Assets 4,827 10,700 352 1,233 17,112 Segment reclassifications, intercompany balances and other (18) (354) (119) 124 (367) Reportable Segment Assets $ 4,809 $ 10,346 $ 233 $ 1,357 $ 16,745 (a) Includes balances of the wholly owned subsidiary Duke Energy Kentucky. (b) Includes the elimination of intercompany balances and purchase accounting adjustments. 23 GAS UTILITIES AND INFRASTRUCTURE CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY (Unaudited) March 31, 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 $ 71 $ 234 $ 9 $ 1 $ 315 Accounts payable to affiliated companies 3 146 14 (95) 68 Notes payable to affiliated companies 27 — — (4) 23 Taxes accrued 39 526 18 — 583 Interest accrued 10 48 — — 58 Current maturities of long-term debt 17 40 — — 57 Regulatory liabilities 36 48 — — 84 Other 4 67 — 1 72 Total current liabilities 207 1,109 41 (97) 1,260 Long-Term Debt 859 3,761 55 42 4,717 Long-Term Debt Payable to Affiliated Companies 7 — — — 7 Other Noncurrent Liabilities Deferred income taxes 475 864 51 1 1,391 Asset retirement obligations 67 26 — — 93 Regulatory liabilities 228 780 — 11 1,019 Operating lease liabilities — 1 — — 1 Accrued pension and other post-retirement benefit costs 24 6 — 1 31 Investment tax credits — 1 — — 1 Other 31 85 — — 116 Total other noncurrent liabilities 825 1,763 51 13 2,652 Equity Total Duke Energy Corporation stockholders' equity 2,929 4,067 202 1,275 8,473 Noncontrolling interests — — 3 — 3 Total equity 2,929 4,067 205 1,275 8,476 Total Liabilities and Equity 4,827 10,700 352 1,233 17,112 Segment reclassifications, intercompany balances and other (18) (354) (119) 124 (367) Reportable Segment Liabilities and Equity $ 4,809 $ 10,346 $ 233 $ 1,357 $ 16,745 (a) Includes balances of the wholly owned subsidiary Duke Energy Kentucky. (b) Includes the elimination of intercompany balances and purchase accounting adjustments. 24 Electric Utilities and Infrastructure Quarterly Highlights March 2026 Three Months Ended March 31, 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) Gigawatt-hour (GWh) Sales (a) Residential 25,405 25,225 0.7 % (0.9 %) Commercial 19,071 18,902 0.9 % 1.2 % Industrial 10,738 10,964 (2.1 %) (2.4 %) Other Energy Sales 130 116 12.1 % n/a Unbilled Sales (1,675) (1,816) 7.8 % n/a Total Retail Sales 53,669 53,391 0.5 % (0.5 %) Wholesale and Other 11,785 11,851 (0.6 %) Total Consolidated Electric Sales – Electric Utilities and Infrastructure 65,454 65,242 0.3 % Average Number of Customers (Electric) Residential 7,616,258 7,498,119 1.6 % Commercial 1,050,836 1,045,224 0.5 % Industrial 14,795 15,305 (3.3 %) Other Energy Sales 22,757 23,202 (1.9 %) Total Retail Customers 8,704,646 8,581,850 1.4 % Wholesale and Other 54 52 3.8 % Total Average Number of Customers – Electric Utilities and Infrastructure 8,704,700 8,581,902 1.4 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 11,781 11,347 3.8 % Nuclear 18,506 18,926 (2.2 %) Hydro 290 446 (35.0 %) Natural Gas and Oil 21,765 21,553 1.0 % Renewable Energy 985 841 17.1 % Total Generation (d) 53,327 53,113 0.4 % Purchased Power and Net Interchange (e) 15,239 14,952 1.9 % Total Sources of Energy 68,566 68,065 0.7 % Less: Line Loss and Other 3,112 2,823 10.2 % Total GWh Sources 65,454 65,242 0.3 % Owned Megawatt (MW) Capacity (c)(f) Summer 51,989 50,562 Winter 55,757 55,139 Nuclear Capacity Factor (%) (g) 97 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. 25 Duke Energy Carolinas Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information March 2026 Three Months Ended March 31, 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 9,082 9,138 (0.6 %) Commercial 7,334 7,390 (0.8 %) Industrial 4,506 4,554 (1.1 %) Other Energy Sales 69 56 23.2 % Unbilled Sales (615) (730) 15.8 % Total Retail Sales 20,376 20,408 (0.2 %) (0.6 %) Wholesale and Other 3,204 3,150 1.7 % Total Consolidated Electric Sales – Duke Energy Carolinas 23,580 23,558 0.1 % Average Number of Customers Residential 2,575,950 2,524,566 2.0 % Commercial 403,006 401,939 0.3 % Industrial 5,750 5,895 (2.5 %) Other Energy Sales 10,700 10,836 (1.3 %) Total Retail Customers 2,995,406 2,943,236 1.8 % Wholesale and Other 26 26 — % Total Average Number of Customers – Duke Energy Carolinas 2,995,432 2,943,262 1.8 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 2,931 3,285 (10.8 %) Nuclear 11,407 11,789 (3.2 %) Hydro 126 251 (49.8 %) Natural Gas and Oil 6,451 5,880 9.7 % Renewable Energy 59 57 3.5 % Total Generation (d) 20,974 21,262 (1.4 %) Purchased Power and Net Interchange (e) 3,754 3,238 15.9 % Total Sources of Energy 24,728 24,500 0.9 % Less: Line Loss and Other 1,148 942 21.9 % Total GWh Sources 23,580 23,558 0.1 % Owned MW Capacity (c)(f) Summer 19,858 19,698 Winter 20,946 20,773 Nuclear Capacity Factor (%) (g) 99 102 Heating and Cooling Degree Days Actual Heating Degree Days 1,597 1,643 (2.8 %) Cooling Degree Days 46 8 475.0 % Variance from Normal Heating Degree Days (5.1 %) (3.2 %) Cooling Degree Days 468.5 % (2.4 %) (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) 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. 26 Duke Energy Progress Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information March 2026 Three Months Ended March 31, 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 5,926 5,880 0.8 % Commercial 3,799 3,740 1.6 % Industrial 2,192 2,457 (10.8 %) Other Energy Sales 21 21 — % Unbilled Sales (495) (747) 33.7 % Total Retail Sales 11,443 11,351 0.8 % (1.0 %) Wholesale and Other 6,844 6,834 0.1 % Total Consolidated Electric Sales – Duke Energy Progress 18,287 18,185 0.6 % Average Number of Customers Residential 1,545,119 1,518,693 1.7 % Commercial 249,489 248,333 0.5 % Industrial 2,973 3,072 (3.2 %) Other Energy Sales 2,368 2,406 (1.6 %) Total Retail Customers 1,799,949 1,772,504 1.5 % Wholesale and Other 8 8 — % Total Average Number of Customers – Duke Energy Progress 1,799,957 1,772,512 1.5 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 2,015 2,276 (11.5 %) Nuclear 7,099 7,137 (0.5 %) Hydro 119 138 (13.8 %) Natural Gas and Oil 6,941 6,519 6.5 % Renewable Energy 60 50 20.0 % Total Generation (d) 16,234 16,120 0.7 % Purchased Power and Net Interchange (e) 2,295 2,492 (7.9 %) Total Sources of Energy 18,529 18,612 (0.4 %) Less: Line Loss and Other 242 427 (43.3 %) Total GWh Sources 18,287 18,185 0.6 % Owned MW Capacity (c)(f) Summer 12,865 12,585 Winter 14,067 13,845 Nuclear Capacity Factor (%) (g) 92 92 Heating and Cooling Degree Days Actual Heating Degree Days 1,545 1,523 1.4 % Cooling Degree Days 53 15 253.3 % Variance from Normal Heating Degree Days (0.4 %) (2.6 %) Cooling Degree Days 302.5 % 14.9 % (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. 27 Duke Energy Florida Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information March 2026 Three Months Ended March 31, 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 4,789 4,618 3.7 % Commercial 3,433 3,402 0.9 % Industrial 774 783 (1.1 %) Other Energy Sales 7 7 — % Unbilled Sales (40) (125) 68.0 % Total Retail Sales 8,963 8,685 3.2 % 0.1 % Wholesale and Other 353 383 (7.8 %) Total Electric Sales – Duke Energy Florida 9,316 9,068 2.7 % Average Number of Customers Residential 1,837,440 1,811,645 1.4 % Commercial 214,245 211,835 1.1 % Industrial 1,519 1,616 (6.0 %) Other Energy Sales 3,497 3,562 (1.8 %) Total Retail Customers 2,056,701 2,028,658 1.4 % Wholesale and Other 15 13 15.4 % Total Average Number of Customers – Duke Energy Florida 2,056,716 2,028,671 1.4 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 1,488 454 227.8 % Natural Gas and Oil 7,029 8,004 (12.2 %) Renewable Energy 860 729 18.0 % Total Generation (d) 9,377 9,187 2.1 % Purchased Power and Net Interchange (e) 245 108 126.9 % Total Sources of Energy 9,622 9,295 3.5 % Less: Line Loss and Other 306 227 34.8 % Total GWh Sources 9,316 9,068 2.7 % Owned MW Capacity (c)(f) Summer 11,854 10,895 Winter 12,765 12,542 Heating and Cooling Degree Days Actual Heating Degree Days 416 359 15.9 % Cooling Degree Days 267 215 24.2 % Variance from Normal Heating Degree Days 12.0 % (1.8 %) Cooling Degree Days 31.3 % 1.6 % (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. 28 Duke Energy Ohio Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information March 2026 Three Months Ended March 31, 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 2,713 2,672 1.5 % Commercial 2,400 2,329 3.0 % Industrial 1,111 1,096 1.4 % Other Energy Sales 21 19 10.5 % Unbilled Sales (200) (121) (65.3 %) Total Retail Sales 6,045 5,995 0.8 % 0.7 % Wholesale and Other 266 112 137.5 % Total Electric Sales – Duke Energy Ohio 6,311 6,107 3.3 % Average Number of Customers Residential 842,841 837,876 0.6 % Commercial 76,626 76,514 0.1 % Industrial 1,970 2,101 (6.2 %) Other Energy Sales 2,564 2,652 (3.3 %) Total Retail Customers 924,001 919,143 0.5 % Wholesale and Other 1 1 — % Total Average Number of Customers – Duke Energy Ohio 924,002 919,144 0.5 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 900 779 15.5 % Natural Gas and Oil 103 37 178.4 % Total Generation (d) 1,004 816 23.0 % Purchased Power and Net Interchange (e) 5,907 6,046 (2.3 %) Total Sources of Energy 6,911 6,862 0.7 % Less: Line Loss and Other 600 755 (20.5 %) Total GWh Sources 6,311 6,107 3.3 % Owned MW Capacity (c)(f) Summer 1,085 1,080 Winter 1,173 1,173 Heating and Cooling Degree Days Actual Heating Degree Days 2,462 2,563 (3.9 %) Cooling Degree Days 20 7 185.7 % Variance from Normal Heating Degree Days (3.4 %) 0.6 % Cooling Degree Days 590.1 % 142.5 % (a) Except as indicated in footnote (b), represents non-weather-normalized billed sales, with energy delivered but not yet billed (i.e., unbilled sales) reflected as a single amount and not allocated to the respective retail classes. (b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales). (c) Statistics reflect Duke Energy's ownership share of jointly owned stations. (d) Generation by source is reported net of auxiliary power. (e) Purchased power includes renewable energy purchases. (f) Based on winter capacity for Fossil, Nuclear and Hydro generation stations, and nameplate capacity for Renewable generation stations. 29 Duke Energy Indiana Quarterly Highlights Supplemental Electric Utilities and Infrastructure Information March 2026 Three Months Ended March 31, 2026 2025 % Inc. (Dec.) % Inc. (Dec.) Weather Normal (b) GWh Sales (a) Residential 2,895 2,917 (0.8 %) Commercial 2,105 2,041 3.1 % Industrial 2,155 2,074 3.9 % Other Energy Sales 12 13 (7.7 %) Unbilled Sales (325) (93) (249.5 %) Total Retail Sales 6,842 6,952 (1.6 %) (1.0 %) Wholesale and Other 1,118 1,372 (18.5 %) Total Electric Sales – Duke Energy Indiana 7,960 8,324 (4.4 %) Average Number of Customers Residential 814,908 805,339 1.2 % Commercial 107,470 106,603 0.8 % Industrial 2,583 2,621 (1.4 %) Other Energy Sales 3,628 3,746 (3.2 %) Total Retail Customers 928,589 918,309 1.1 % Wholesale and Other 4 4 — % Total Average Number of Customers – Duke Energy Indiana 928,593 918,313 1.1 % Sources of Electric Energy (GWh) Generated – Net Output (c) Coal 4,447 4,553 (2.3 %) Hydro 45 57 (21.1 %) Natural Gas and Oil 1,241 1,113 11.5 % Renewable Energy 5 5 — % Total Generation (d) 5,738 5,728 0.2 % Purchased Power and Net Interchange (e) 3,038 3,068 (1.0 %) Total Sources of Energy 8,776 8,796 (0.2 %) Less: Line Loss and Other 816 472 72.9 % Total GWh Sources 7,960 8,324 (4.4 %) Owned MW Capacity (c)(f) Summer 6,327 6,304 Winter 6,806 6,806 Heating and Cooling Degree Days Actual Heating Degree Days 2,579 2,731 (5.6 %) Cooling Degree Days 16 2 700.0 % Variance from Normal Heating Degree Days (6.8 %) (0.5 %) Cooling Degree Days 532.7 % (10.9 %) (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. 30 Gas Utilities and Infrastructure Quarterly Highlights March 2026 Three Months Ended March 31, 2026 2025 % Inc. (Dec.) Total Sales Piedmont Natural Gas Local Distribution Company (LDC) throughput (dekatherms) (a) 184,175,397 181,459,847 1.5 % Duke Energy Midwest LDC throughput (Mcf) (a) 36,902,590 40,455,684 (8.8 %) Average Number of Customers – Piedmont Natural Gas Residential 1,035,404 1,092,898 (5.3 %) Commercial 105,098 109,848 (4.3 %) Industrial 872 945 (7.7 %) Power Generation 19 19 — % Total Average Number of Gas Customers – Piedmont Natural Gas 1,141,393 1,203,710 (5.2 %) Average Number of Customers – Duke Energy Midwest Residential 528,525 526,598 0.4 % Commercial 35,770 35,285 1.4 % Industrial 2,007 2,334 (14.0 %) Other 114 117 (2.6 %) Total Average Number of Gas Customers – Duke Energy Midwest 566,416 564,334 0.4 % (a) Piedmont has a margin decoupling mechanism in North Carolina, weather normalization mechanisms in South Carolina and Tennessee and fixed-price contracts with most power generation customers that significantly eliminate the impact of throughput changes on earnings. Duke Energy Ohio's rate design also serves to offset this impact. On March 31, 2026, Piedmont closed on the sale of its Tennessee business. 31

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other guidance in this release

Text is the filed exhibit, verbatim.