Form 8-K

8-K — Duke Energy CORP

Accession: 0001326160-26-000037

Filed: 2026-08-04

Period: 2026-08-04

CIK: 0001326160

SIC: 4931 (ELECTRIC & OTHER SERVICES COMBINED)

Item: Results of Operations and Financial Condition

Item: Financial Statements and Exhibits

Documents

8-K — duk-20260804.htm (Primary)

EX-99.1 (er-20260630xearningsreleas.htm)

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XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K

8-K (Primary)

Filename: duk-20260804.htm · Sequence: 1

duk-20260804

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 4, 2026

Commission File Number Exact Name of Registrant as Specified in its Charter, State or other Jurisdiction of Incorporation,

Address of Principal Executive Offices, Zip Code, and Registrant's Telephone Number, Including Area Code IRS Employer Identification No.

1-32853

DUKE ENERGY CORPORATION

20-2777218

(a Delaware corporation)

525 South Tryon Street

Charlotte, North Carolina 28202

800-488-3853

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

Registrant Title of each class Trading Symbol(s) Name of each exchange on which registered

Duke Energy Common Stock, $0.001 par value DUK New York Stock Exchange LLC

Duke Energy 5.625% Junior Subordinated Debentures DUKB New York Stock Exchange LLC

due September 15, 2078

Duke Energy Depositary Shares DUK PR A New York Stock Exchange LLC

each representing a 1/1,000th interest in a share of 5.75% Series A Cumulative Redeemable Perpetual Preferred Stock, par value $0.001 per share

Duke Energy 3.10% Senior Notes due 2028 DUK 28A New York Stock Exchange LLC

Duke Energy 3.85% Senior Notes due 2034 DUK 34 New York Stock Exchange LLC

Duke Energy 3.75% Senior Notes due 2031 DUK 31A New York Stock Exchange LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Conditions.

On August 4, 2026, Duke Energy Corporation (the "Corporation") will issue and post a news release to its website (duke-energy.com/investors) announcing its financial results for the second quarter ended June 30, 2026. A copy of this news release is attached hereto as Exhibit 99.1. The information in Exhibit 99.1 is being furnished pursuant to this Item 2.02. In accordance with General Instruction B.2 of Form 8-K, the information in Item 2.02 of this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed "filed" for the purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

99.1 News Release to be issued by Duke Energy Corporation on August 4, 2026 (furnished pursuant to Item 2.02).

104 Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURE

Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

DUKE ENERGY CORPORATION

/s/ ABIGAIL L. MOTSINGER

Abigail L. Motsinger

Senior Vice President, Chief Accounting Officer and Controller

Dated: August 4, 2026

EX-99.1

Filename: er-20260630xearningsreleas.htm · Sequence: 2

Document

News Release

Media Contact: Gillian Moore

24-Hour: 800.559.3853

Analyst Contact: Mike Switzer

Office: 704.382.6473

August 4, 2026

Duke Energy reports second-quarter 2026 financial results

▪Second-quarter 2026 reported EPS of $1.38 and adjusted EPS of $1.43; strong first half positions company to deliver full-year results within guidance range

▪Constructive regulatory outcomes support critical investments to maintain reliability and deliver customer value

▪Generation build supports growth in jurisdictions, fuels vibrant economies

CHARLOTTE, N.C. – Duke Energy (NYSE: DUK) today announced second-quarter 2026 reported EPS of $1.38, prepared in accordance with Generally Accepted Accounting Principles (GAAP), and adjusted EPS of $1.43. This is compared to reported and adjusted EPS of $1.25 for the second quarter of 2025.

Adjusted EPS excludes the impact of certain items that are included in reported EPS. The difference between second-quarter 2026 reported and adjusted EPS includes charges related to regulatory settlements.

Higher second-quarter 2026 adjusted results were driven by recovery of infrastructure investments to reliably serve customers in our growing jurisdictions. These items were partially offset by higher depreciation on a growing asset base and interest expense.

The company is reaffirming its 2026 adjusted EPS guidance of $6.55 to $6.80 and long-term adjusted EPS growth rate of 5% to 7% through 2030 off the 2025 midpoint of $6.30, with confidence to earn in the top half of the range beginning in 2028. Management does not forecast reported GAAP EPS and related long-term growth rates.

“We had a strong first half of the year, achieving constructive regulatory outcomes, advancing strategic priorities and maintaining excellence in our operational and financial performance,” said Harry Sideris, Duke Energy president and chief executive officer. “Looking ahead, we are well-positioned to deliver on our commitments in 2026 and seize the growth opportunities in some of the most economically attractive states in the country. As we build the critical infrastructure our customers and communities need, we’re ensuring our investments support economic growth and create long-term value while providing reliable energy at the lowest possible cost.”

Duke Energy News Release 2

Business segment results

In addition to the following summary of second-quarter 2026 business segment performance, comprehensive tables with detailed EPS drivers for the second quarter compared to prior year are provided at the end of this news release.

The discussion below of second-quarter results includes both GAAP segment income and adjusted segment income, which is a non-GAAP financial measure. The tables at the end of this news release present a full reconciliation of GAAP reported results to adjusted results.

Electric Utilities and Infrastructure

On a reported basis, Electric Utilities and Infrastructure recognized second-quarter 2026 segment income of $1,271 million, compared to segment income of $1,194 million in the second quarter of 2025. In addition to the drivers outlined below, second-quarter 2026 results include the impact of charges related to regulatory settlements, which were treated as special items and excluded from adjusted earnings.

On an adjusted basis, Electric Utilities and Infrastructure recognized second-quarter 2026 segment income of $1,310 million, compared to segment income of $1,194 million in the second quarter of 2025. This represents an increase of $0.15 per share. Higher quarterly results were primarily driven by recovery of infrastructure investments to reliably serve customers in our growing jurisdictions, partially offset by higher depreciation on a growing asset base and interest expense.

Gas Utilities and Infrastructure

On a reported and adjusted basis, Gas Utilities and Infrastructure recognized second-quarter 2026 segment income of $10 million, compared to segment income of $6 million in the second quarter of 2025. Flat quarterly results were primarily driven by recovery of infrastructure investments to reliably serve customers in our growing jurisdictions, offset by lower earnings from the sale of Piedmont's Tennessee business.

Other

Other primarily includes interest expense on holding company debt, other unallocated corporate costs and results from Duke Energy’s captive insurance company.

On a reported and adjusted basis, Other recognized a second-quarter 2026 segment loss of $204 million, compared to segment loss of $228 million in the second quarter of 2025. This represents an increase of $0.03 per share. Higher quarterly results were primarily driven by higher returns on investments and lower interest expense.

Duke Energy News Release 3

Effective tax rate

Duke Energy's consolidated reported effective tax rate for the second quarter of 2026 was 12.3% compared to 10.6% in the second quarter of 2025. The increase in the reported effective tax rate was primarily due to a decrease in the amortization of excess deferred taxes.

Duke Energy's consolidated adjusted effective tax rate was 12.6% for the second quarter of 2026 compared to 10.6% in the second quarter of 2025. The increase in the adjusted effective tax rate was primarily due to a decrease in the amortization of excess deferred taxes.

The tables at the end of this news release present a reconciliation of the reported effective tax rate to the adjusted effective tax rate.

Earnings conference call for analysts

An earnings conference call for analysts is scheduled at 10 a.m. ET today to discuss second-quarter 2026 financial results and other business and financial updates. The conference call will be hosted by Harry Sideris, president and chief executive officer, and Brian Savoy, executive vice president and chief financial officer.

The call can be accessed via the investors' section (duke-energy.com/investors) of Duke Energy’s website or by dialing 585.542.9983 in the U.S. or 833.461.5787 outside the U.S. The confirmation code is 485914666. Please call in 10 to 15 minutes prior to the scheduled start time.

Special Items and Non-GAAP Reconciliation

The following table presents a reconciliation of GAAP reported EPS to adjusted EPS for second-quarter 2026 and 2025 financial results:

(In millions, except per share amounts) After-Tax Amount

2Q 2026 EPS

2Q 2025 EPS

EPS, as reported $ 1.38 $ 1.25

Adjustments to reported EPS:

Second quarter 2026

Regulatory Settlements $ 39 $ 0.05

Total adjustments(a)

$ 0.05 $ —

EPS, adjusted $ 1.43 $ 1.25

(a) Total EPS adjustments may not foot due to rounding.

Duke Energy News Release 4

Non-GAAP financial measures

Management evaluates financial performance in part based on non-GAAP financial measures, including adjusted earnings, adjusted EPS and adjusted effective tax rate. Adjusted earnings and adjusted EPS represent income (loss) from continuing operations available to Duke Energy Corporation common stockholders in dollar and basic per share amounts, adjusted for the dollar and per share impact of special items. The adjusted effective tax rate is calculated using pretax earnings and income tax expense, both adjusted to include the impact of noncontrolling interests and preferred dividends and to exclude the impact of special items. Special items represent certain charges and credits, which management believes are not indicative of Duke Energy's ongoing performance.

Special items included within the financial statement periods presented, which management does not believe are reflective of ongoing costs, are described below:

•Regulatory Settlements represent the impact of charges related to the Duke Energy Carolinas' North Carolina rate case settlements.

Management uses these non-GAAP financial measures for planning, forecasting, and to report financial results to the Board of Directors, employees, and stockholders, as well as analysts and investors. The most directly comparable GAAP measures for adjusted earnings, adjusted EPS and the adjusted effective tax rate are Net Income (Loss) Available to Duke Energy Corporation common stockholders (GAAP reported earnings (loss)), Basic earnings (loss) per share Available to Duke Energy Corporation common stockholders (GAAP reported earnings (loss) per share), and the reported effective tax rate, respectively.

Due to the forward-looking nature of forecasted adjusted EPS and related growth rates, the information to reconcile those amounts to the most directly comparable GAAP financial measure is not available, as management is unable to project special items, such as legal settlements, impacts of regulatory orders or asset impairments, for future periods.

Management evaluates segment performance based on segment income and other net loss. Segment income and other net loss are defined as income (loss) from continuing operations net of income attributable to noncontrolling interests and preferred stock dividends. Segment income and other net loss include intercompany revenues and expenses that are eliminated in the Condensed Consolidated Financial Statements. Management also uses adjusted segment income and adjusted other net loss as measures of historical and anticipated future segment performance. Adjusted segment income and adjusted other net loss are non-GAAP financial measures, as they represent segment income and other net loss adjusted for special items, as discussed above. Management believes the presentation of adjusted segment income and adjusted other net loss provide useful information to investors, as they provide additional relevant comparison of a segment’s or Other's performance across periods. The most directly comparable GAAP measures for adjusted segment income and adjusted other net loss are segment income and other net loss.

Duke Energy News Release 5

Due to the forward-looking nature of forecasted adjusted segment income and forecasted adjusted other net loss and related growth rates, the information to reconcile these amounts to the most directly comparable GAAP financial measures are not available, as management is unable to project special items, as discussed above.

Duke Energy’s adjusted earnings, adjusted EPS, adjusted effective tax rate, adjusted segment income, and adjusted other net loss may not be comparable to similarly titled measures of another company because other companies may not calculate the measures in the same manner.

Duke Energy

Duke Energy (NYSE: DUK), a Fortune 150 company headquartered in Charlotte, N.C., is one of America’s largest energy holding companies. The company's electric utilities serve 8.7 million customers in North Carolina, South Carolina, Florida, Indiana, Ohio and Kentucky, and collectively own 55,700 megawatts of energy capacity. Its natural gas utilities serve 1.6 million customers in North Carolina, South Carolina, Ohio and Kentucky.

Duke Energy is executing an energy modernization strategy, keeping customer value at the forefront as it invests in electric grid upgrades and efficient generation resources to strengthen the system and serve growing energy needs.

More information is available at duke-energy.com. Follow Duke Energy on X, LinkedIn, Instagram, TikTok and Facebook for stories about the people and innovations powering its communities.

Forward-Looking Information

This document includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Forward-looking statements are based on management’s beliefs and assumptions and can often be identified by terms and phrases that include “anticipate,” “believe,” “intend,” “estimate,” “expect,” “continue,” “should,” “could,” “may,” “plan,” “project,” “predict,” “will,” “potential,” “forecast,” “target,” “guidance,” “outlook” or other similar terminology. Various factors may cause actual results to be materially different than the suggested outcomes within forward-looking statements; accordingly, there is no assurance that such results will be realized. These factors include, but are not limited to:

◦The ability to implement our business strategy, including meeting forecasted load growth demand, grid and fleet modernization objectives, and reducing carbon emissions, while balancing customer reliability and keeping costs as low as possible for our customers;

◦State, federal and foreign legislative and regulatory initiatives, including costs of compliance with existing and future environmental requirements and/or uncertainty of applicability or changes to such legislative and regulatory initiatives, including those related to climate change, as well as rulings that affect cost and investment recovery or have an impact on rate structures or market prices;

◦The extent and timing of costs and liabilities to comply with federal and state laws, regulations and legal requirements related to coal ash remediation, including amounts for required closure of certain ash impoundments, are uncertain and difficult to estimate;

◦The ability to timely recover eligible costs, including amounts associated with coal ash impoundment retirement obligations, asset retirement and construction costs related to carbon emissions reductions, and costs related to significant weather events, particularly in periods of heightened customer affordability concerns, bill volatility or public and political scrutiny, and to earn an adequate return on investment through rate case proceedings and the regulatory process;

Duke Energy News Release 6

◦The costs of decommissioning nuclear facilities could prove to be more extensive than amounts estimated and all costs may not be fully recoverable through the regulatory process;

◦The impact of extraordinary external events, such as a global pandemic, trade wars or military conflict, and their collateral consequences, including the disruption of global supply chains or the economic activity in our service territories;

◦Costs and effects of legal and administrative proceedings, settlements, investigations and claims;

◦Industrial, commercial and residential decline in service territories or customer bases resulting from sustained downturns of the economy, storm damage, reduced customer usage due to cost pressures from inflation, tariffs, or fuel costs, worsening economic health of our service territories, reductions in customer usage patterns, or lower than anticipated load growth, particularly if usage of electricity by data centers is less than currently projected, energy efficiency efforts, natural gas building and appliance electrification, and use of alternative energy sources, such as self-generation and distributed generation technologies;

◦Federal and state regulations, laws and other efforts designed to promote and expand the use of energy efficiency measures, natural gas electrification, and distributed generation technologies, such as private solar and battery storage, in Duke Energy service territories could result in a reduced number of customers, excess generation resources as well as stranded costs;

◦Advancements in technology, including artificial intelligence;

◦Additional competition in electric and natural gas markets, municipalization and continued industry consolidation;

◦The influence of weather and other natural phenomena on operations, financial position, and cash flows, including the economic, operational and other effects of severe storms, hurricanes, droughts, earthquakes and tornadoes, including extreme weather associated with climate change;

◦Changing or conflicting investor, customer and other stakeholder expectations and demands, particularly regarding environmental, social and governance matters and costs related thereto;

◦The ability to successfully operate electric generating facilities and deliver electricity to customers, including direct or indirect effects to the Company resulting from an incident that affects the United States electric grid or generating resources;

◦Operational interruptions to our natural gas distribution and transmission activities;

◦The availability of adequate interstate pipeline transportation capacity and natural gas supply;

◦The impact on facilities and business from a terrorist or other attack, war, vandalism, cybersecurity threats, data security breaches, operational events, information technology failures or other catastrophic events, such as severe storms, fires, explosions, pandemic health events or other similar occurrences;

◦The inherent risks associated with the operation of nuclear facilities, including environmental, health, safety, regulatory and financial risks, including the financial stability of third-party service providers;

◦The timing and extent of changes in commodity prices, including any impact from increased tariffs, export controls and interest rates, and the ability to timely recover such costs through the regulatory process, where appropriate, and their impact on liquidity positions and the value of underlying assets;

◦The results of financing efforts, including the ability to obtain financing on favorable terms, which can be affected by various factors, including credit ratings, interest rate fluctuations, compliance with debt covenants and conditions, an individual utility’s generation portfolio, and general market and economic conditions;

◦Credit ratings of the Duke Energy Registrants may be different from what is expected;

◦Declines in the market prices of equity and fixed-income securities and resultant cash funding requirements for defined benefit pension plans, other post-retirement benefit plans and nuclear decommissioning trust funds;

◦Construction and development risks associated with the completion of the Duke Energy Registrants’ capital investment projects, including risks related to financing, timing and receipt of necessary regulatory approvals, obtaining and complying with terms of permits, meeting construction budgets and schedules, obtaining sufficient skilled labor and satisfying operating and environmental performance standards, as well as the ability to recover costs from customers in a timely manner, or at all;

Duke Energy News Release 7

◦Changes in rules for regional transmission organizations, including changes in rate designs and new and evolving capacity markets, and risks related to obligations created by the default of other participants;

◦The ability to control operation and maintenance costs;

◦The level of creditworthiness of counterparties to transactions;

◦The ability to obtain adequate insurance at acceptable costs and recover on claims made;

◦Employee workforce factors, including the potential inability to attract and retain key personnel;

◦The ability of subsidiaries to pay dividends or distributions to Duke Energy Corporation holding company (the Parent);

◦The performance of projects undertaken by our businesses and the success of efforts to invest in and develop new opportunities;

◦The effect of accounting and reporting pronouncements issued periodically by accounting standard-setting bodies and the SEC;

◦The impact of United States tax legislation to our financial condition, results of operations or cash flows and our credit ratings;

◦The impacts from potential impairments of goodwill or investment carrying values;

◦Asset or business acquisitions and dispositions may not be consummated or yield the anticipated benefits, which could adversely affect our financial condition, credit metrics or ability to execute strategic and capital plans;

◦The (i) failure to realize the anticipated benefits, synergies and value creation expected from the utility combination by which Duke Energy Progress will merge into Duke Energy Carolinas (the Combination), including as a result of difficulties or delays in integrating the contributed assets and operations and/or the incurring of significant costs in connection with the Combination; and (ii) the risk that the combined entity may not perform as expected following the consummation of the Combination due to unforeseen liabilities, its level of indebtedness, integration challenges, market conditions, ratings downgrades or other factors beyond the control of the parties; and

◦The actions of activist shareholders could disrupt our operations, impact our ability to execute on our business strategy, or cause fluctuations in the trading price of our common stock.

Additional risks and uncertainties are identified and discussed in the Duke Energy Registrants' reports filed with the SEC and available at the SEC's website at sec.gov. In light of these risks, uncertainties and assumptions, the events described in the forward-looking statements might not occur or might occur to a different extent or at a different time than described. Forward-looking statements speak only as of the date they are made and the Duke Energy Registrants expressly disclaim an obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

DUKE ENERGY CORPORATION

REPORTED TO ADJUSTED EARNINGS RECONCILIATION

Three Months Ended June 30, 2026

(Dollars in millions, except per share amounts)

Special Item

Reported Earnings Regulatory Settlements Total Adjustments Adjusted Earnings

SEGMENT INCOME (LOSS)

Electric Utilities and Infrastructure $ 1,271 $ 39 A $ 39 $ 1,310

Gas Utilities and Infrastructure 10 — — 10

Total Reportable Segment Income 1,281 39 39 1,320

Other (204) — — (204)

Net Income Available to Duke Energy Corporation Common Stockholders

$ 1,077 $ 39 $ 39 $ 1,116

EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS

$ 1.38 $ 0.05 $ 0.05 $ 1.43

Note: Total EPS adjustments may not cross-foot due to rounding.

A – Duke Energy Carolinas and Duke Energy Progress recorded a total of $51 million pretax within Impairment of assets and other charges on the Condensed Consolidated Statements of Operations as a result of the Duke Energy Carolinas' North Carolina rate case settlements. Segment income for this matter is net of a $12 million tax benefit.

Weighted Average Shares, basic (reported and adjusted) – 779 million

DUKE ENERGY CORPORATION

REPORTED TO ADJUSTED EARNINGS RECONCILIATION

Six Months Ended June 30, 2026

(Dollars in millions, except per share amounts)

Special Items

Reported Earnings

Legal and Regulatory Settlements

Asset Sales

Discontinued Operations Total Adjustments Adjusted Earnings

SEGMENT INCOME (LOSS)

Electric Utilities and Infrastructure $ 2,525 $ 189

$ — $ — $ 189 $ 2,714

Gas Utilities and Infrastructure 542 — (171)

— (171) 371

Total Reportable Segment Income 3,067 189 (171) — 18 3,085

Other (467) — — — (467)

Discontinued Operations 13 — — (13)

(13) —

Net Income Available to Duke Energy Corporation Common Stockholders $ 2,613 $ 189 $ (171) $ (13) $ 5 $ 2,618

EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 3.35 $ 0.24 $ (0.22) $ (0.02) $ 0.01 $ 3.36

Note: Total EPS adjustments may not cross-foot due to rounding.

A – Duke Energy Carolinas and Duke Energy Progress recorded a total of $248 million pretax within Operations, maintenance and other, Impairment of assets and other charges, and Operating Revenues on the Condensed Consolidated Statements of Operations due to certain legal settlements, as well as regulatory settlements related to the Duke Energy Carolinas' North Carolina rate case and establishment of a regulatory liability associated with an energy efficiency program. Segment income amount for these matters is net of a $59 million tax benefit.

B – Net of $196 million tax expense, which includes the impact of nondeductible goodwill related to the sale of Piedmont's Tennessee business.

•$368 million recorded within Gains on Sales of Other Assets and Other, net, and $7 million recorded within Property and other taxes on the Condensed Consolidated Statements of Operations related to the sale of Piedmont's Tennessee business.

•$6 million recorded within Gains on Sales of Other Assets and Other, net on the Condensed Consolidated Statements of Operations related to the sale of certain renewable natural gas investments.

C – Recorded in Income (Loss) from Discontinued Operations, net of tax, on the Condensed Consolidated Statements of Operations.

Weighted Average Shares, basic (reported and adjusted) – 779 million

DUKE ENERGY CORPORATION

REPORTED TO ADJUSTED EARNINGS RECONCILIATION

Three Months Ended June 30, 2025

(Dollars in millions, except per share amounts)

Reported Earnings Discontinued Operations Total Adjustments Adjusted Earnings

SEGMENT INCOME (LOSS)

Electric Utilities and Infrastructure $ 1,194 $ — $ — $ 1,194

Gas Utilities and Infrastructure 6 — — 6

Total Reportable Segment Income 1,200 — — 1,200

Other (228) — — (228)

Discontinued Operations (1) 1 A 1 —

Net Income Available to Duke Energy Corporation Common Stockholders $ 971 $ 1 $ 1 $ 972

EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS

$ 1.25 $ — $ — $ 1.25

Note: Total EPS adjustments may not cross-foot due to rounding.

A – Recorded in Income (Loss) from Discontinued Operations, net of tax, on the Condensed Consolidated Statements of Operations.

Weighted Average Shares, basic (reported and adjusted) – 777 million

DUKE ENERGY CORPORATION

REPORTED TO ADJUSTED EARNINGS RECONCILIATION

Six Months Ended June 30, 2025

(Dollars in millions, except per share amounts)

Reported Earnings Discontinued Operations Total Adjustments Adjusted Earnings

SEGMENT INCOME (LOSS)

Electric Utilities and Infrastructure $ 2,470 $ — $ — $ 2,470

Gas Utilities and Infrastructure 355 — — 355

Total Reportable Segment Income 2,825 — — 2,825

Other (488) — — (488)

Discontinued Operations (1) 1 A 1 —

Net Income Available to Duke Energy Corporation Common Stockholders $ 2,336 $ 1 $ 1 $ 2,337

EPS AVAILABLE TO DUKE ENERGY CORPORATION COMMON STOCKHOLDERS $ 3.00 $ — $ — $ 3.00

Note: Total EPS adjustments may not cross-foot due to rounding.

A – Recorded in Income (Loss) from Discontinued Operations, net of tax, on the Condensed Consolidated Statements of Operations.

Weighted Average Shares, basic (reported and adjusted) – 777 million

DUKE ENERGY CORPORATION

EFFECTIVE TAX RECONCILIATION

June 2026

(Dollars in millions)

Three Months Ended

June 30, 2026 Six Months Ended

June 30, 2026

Balance Effective Tax Rate Balance Effective Tax Rate

Reported Income From Continuing Operations Before Income Taxes $ 1,305 $ 3,202

Legal and Regulatory Settlements

51 248

Asset Sales

— (367)

Noncontrolling Interests (64) (96)

Preferred Dividends

(15) (29)

Adjusted Pretax Income

$ 1,277 $ 2,958

Reported Income Tax Expense From Continuing Operations $ 160 12.3 % $ 493 15.4 %

Legal and Regulatory Settlements

12 59

Asset Sales

— (196)

Noncontrolling Interest Portion of Income Taxes(a)

(11) (16)

Adjusted Tax Expense

$ 161 12.6 % $ 340 11.5 %

Three Months Ended

June 30, 2025 Six Months Ended

June 30, 2025

Balance Effective Tax Rate Balance Effective Tax Rate

Reported Income From Continuing Operations Before Income Taxes $ 1,127 $ 2,724

Noncontrolling Interests (27) (55)

Preferred Dividends (13) (27)

Adjusted Pretax Income

$ 1,087 $ 2,642

Reported Income Tax Expense From Continuing Operations $ 119 10.6 % $ 312 11.5 %

Noncontrolling Interest Portion of Income Taxes(a)

(4) (7)

Adjusted Tax Expense

$ 115 10.6 % $ 305 11.5 %

(a) Income tax related to non-pass-through entities for tax purposes.

DUKE ENERGY CORPORATION

EARNINGS VARIANCES

June 2026 QTD vs. Prior Year

(Dollars per share) Electric Utilities and Infrastructure Gas

Utilities and Infrastructure Other Consolidated

2025 QTD Reported and Adjusted Earnings Per Share

$ 1.54 $ 0.01 $ (0.30) $ 1.25

Weather (0.02) — — (0.02)

Volume(a)

0.08 — — 0.08

Riders and Other Retail Margin(b)

0.09 (0.01) — 0.08

Rate case impacts, net(c)

0.10 — — 0.10

Wholesale 0.04 — — 0.04

Interest Expense(d)

(0.05) — 0.01 (0.04)

AFUDC Equity 0.02 — — 0.02

Depreciation and amortization(d)

(0.09) — — (0.09)

Other (0.02) 0.01 0.02 0.01

Total variance $ 0.15 $ — $ 0.03 $ 0.18

2026 QTD Adjusted Earnings Per Share

$ 1.69 $ 0.01 $ (0.27) $ 1.43

Regulatory Settlements (0.05) — — (0.05)

2026 QTD Reported Earnings Per Share

$ 1.64 $ 0.01 $ (0.27) $ 1.38

Note: Earnings Per Share amounts are calculated using the consolidated statutory income tax rate for all drivers. Basic weighted average shares outstanding increased from 777 million to 779 million. Totals may not foot or cross-foot due to rounding.

(a) Includes block and seasonal pricing.

(b) Electric Utilities and Infrastructure includes higher grid modernization riders and North Carolina Power Bill Reduction Act (SB266) impacts.

(c) Electric Utilities and Infrastructure includes impacts from DEI Step 2 rates, effective March 2026 (+$0.03), DEC North Carolina Year 3 rates, effective January 2026, and DEC South Carolina rates, effective March 2026 (+$0.02), DEF Year 2 rates, effective January 2026 (+$0.02), DEP North Carolina Year 3 rates, effective October 2025, and DEP South Carolina rates, effective February 2026 (+$0.02) and DEK rates, effective July 2025 (+$0.01).

(d) Electric Utilities and Infrastructure excludes rate case impacts.

DUKE ENERGY CORPORATION

EARNINGS VARIANCES

June 2026 YTD vs. Prior Year

(Dollars per share) Electric Utilities and Infrastructure Gas

Utilities and Infrastructure Other Discontinued Operations Consolidated

2025 YTD Reported and Adjusted Earnings Per Share

$ 3.18 $ 0.45 $ (0.63) $ — $ 3.00

Weather 0.02 — — — 0.02

Volume(a)

0.11 — — — 0.11

Riders and Other Retail Margin(b)

0.20 0.02 — — 0.22

Rate case impacts, net(c)

0.23 0.01 — — 0.24

Wholesale

0.05 — — — 0.05

Operations and maintenance, net of recoverables(d)

(0.08) (0.01) — — (0.09)

Interest Expense(e)

(0.07) — (0.02) — (0.09)

AFUDC Equity 0.04 — — — 0.04

Depreciation and amortization(e)

(0.16) (0.01) — — (0.17)

Other(f)

(0.03) 0.01 0.05 — 0.03

Total variance $ 0.31 $ 0.02 $ 0.03 $ — $ 0.36

2026 YTD Adjusted Earnings Per Share

$ 3.49 $ 0.47 $ (0.60) $ — $ 3.36

Legal and Regulatory Settlements

(0.24) — — — (0.24)

Asset Sales

— 0.22 — — 0.22

Discontinued Operations — — — 0.02 0.02

2026 YTD Reported Earnings Per Share

$ 3.25 $ 0.69 $ (0.60) $ 0.02 $ 3.35

(a) Includes block and seasonal pricing.

(b) Electric Utilities and Infrastructure includes higher grid modernization riders, SB266 impacts and higher transmission revenues. Gas Utilities and Infrastructure includes higher capital riders and customer growth in North Carolina and South Carolina.

(c) Electric Utilities and Infrastructure includes impacts from DEI Step 2 rates, effective March 2026 (+$0.06), DEC North Carolina Year 3 rates, effective January 2026, and DEC South Carolina rates, effective March 2026 (+$0.05), DEF Year 2 rates, effective January 2026 (+$0.05), DEP North Carolina Year 3 rates, effective October 2025, and DEP South Carolina rates, effective February 2026 (+$0.05) and DEK rates, effective July 2025 (+$0.02). Gas Utilities and Infrastructure includes impacts from DEK rates, effective January 2026.

(d) Electric Utilities and Infrastructure includes higher storm costs (-$0.03) and increased bad debt expense (-$0.02) in the current year.

(e) Electric Utilities and Infrastructure excludes rate case impacts.

(f) Other includes lower contributions to the Duke Energy Foundation and higher market returns in the current year.

DUKE ENERGY CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

(In millions, except per share amounts)

Three Months Ended Six Months Ended

June 30, June 30,

2026 2025 2026 2025

Operating Revenues

Regulated electric $ 7,103 $ 6,968 $ 14,906 $ 14,032

Regulated natural gas 418 462 1,715 1,567

Nonregulated electric and other 71 78 149 158

Total operating revenues 7,592 7,508 16,770 15,757

Operating Expenses

Fuel used in electric generation and purchased power 1,915 1,878 4,334 3,977

Cost of natural gas 130 158 655 532

Operation, maintenance and other 1,385 1,655 3,137 3,154

Depreciation and amortization 1,700 1,583 3,389 3,095

Property and other taxes 374 415 826 843

Impairment of assets and other charges 49 3 49 3

Total operating expenses 5,553 5,692 12,390 11,604

Gains (Losses) on Sales of Other Assets and Other, net 10 14 394 20

Operating Income 2,049 1,830 4,774 4,173

Other Income and Expenses

Equity in earnings (losses) of unconsolidated affiliates 10 11 17 22

Other income and expenses, net 203 183 336 315

Total other income and expenses 213 194 353 337

Interest Expense 957 897 1,925 1,786

Income From Continuing Operations Before Income Taxes 1,305 1,127 3,202 2,724

Income Tax Expense From Continuing Operations 160 119 493 312

Income From Continuing Operations 1,145 1,008 2,709 2,412

Income (Loss) From Discontinued Operations, net of tax — (1) 13 (1)

Net Income

1,145 1,007 2,722 2,411

Less: Net Income Attributable to NCI 53 23 80 48

Net Income Attributable to Duke Energy Corporation

1,092 984 2,642 2,363

Less: Preferred Dividends 15 13 29 27

Net Income Available to Duke Energy Corporation Common Stockholders

$ 1,077 $ 971 $ 2,613 $ 2,336

Earnings Per Share – Basic and Diluted

Income from continuing operations available to Duke Energy Corporation common stockholders

Basic and Diluted $ 1.38 $ 1.25 $ 3.33 $ 3.00

Income (loss) from discontinued operations attributable to Duke Energy Corporation common stockholders

Basic and Diluted $ — $ — $ 0.02 $ —

Net income available to Duke Energy Corporation common stockholders

Basic and Diluted $ 1.38 $ 1.25 $ 3.35 $ 3.00

Weighted average shares outstanding

Basic and Diluted 779 777 779 777

DUKE ENERGY CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(In millions) June 30, 2026 December 31, 2025

ASSETS

Current Assets

Cash and cash equivalents $ 673 $ 245

Receivables (net of allowance for doubtful accounts of $214 at 2026 and $194 at 2025) 4,482 4,230

Inventory (includes $1,013 at 2026 and $669 at 2025 related to VIEs) 4,665 4,569

Regulatory assets (includes $205 at 2026 and $204 at 2025 related to VIEs) 2,645 1,934

Assets held for sale — 109

Other (includes $145 at 2026 and $88 at 2025 related to VIEs) 684 526

Total current assets 13,149 11,613

Property, Plant and Equipment

Cost (includes $3,610 at 2026 and $2,913 at 2025 related to VIEs) 197,562 190,409

Accumulated depreciation and amortization (includes ($138) at 2026 and ($89) at 2025 related to VIEs) (62,326) (60,450)

Net property, plant and equipment 135,236 129,959

Other Noncurrent Assets

Goodwill 19,010 19,010

Regulatory assets (includes $3,027 at 2026 and $3,108 at 2025 related to VIEs) 14,411 14,379

Nuclear decommissioning trust funds 13,590 12,889

Operating lease right-of-use assets, net 1,166 1,241

Investments in equity method unconsolidated affiliates 332 330

Assets held for sale — $ 2,148

Other 4,197 4,167

Total other noncurrent assets 52,706 54,164

Total Assets $ 201,091 $ 195,736

LIABILITIES AND EQUITY

Current Liabilities

Accounts payable (includes $452 at 2026 and $296 at 2025 related to VIEs) $ 4,940 $ 5,223

Notes payable and commercial paper 2,330 2,624

Taxes accrued 1,035 975

Interest accrued 899 922

Current maturities of long-term debt (includes $147 at 2026 and $118 at 2025 related to VIEs) 6,666 7,104

Asset retirement obligations 570 579

Regulatory liabilities 1,422 1,271

Liabilities associated with assets held for sale — 84

Other 2,026 2,265

Total current liabilities 19,888 21,047

Long-Term Debt (includes $3,221 at 2026 and $3,308 at 2025 related to VIEs) 82,242 80,108

Other Noncurrent Liabilities

Deferred income taxes 13,344 12,377

Asset retirement obligations 9,202 9,046

Regulatory liabilities 15,359 15,682

Operating lease liabilities 968 1,033

Accrued pension and other post-retirement benefit costs 348 396

Investment tax credits 976 969

Liabilities associated with assets held for sale — $ 170

Other 1,901 1,889

Total other noncurrent liabilities 42,098 41,562

Commitments and Contingencies

Equity

Preferred stock, Series A, $0.001 par value, 40 million depositary shares authorized and outstanding at 2026 and 2025

973 973

Common stock, $0.001 par value, 2 billion shares authorized; 780 million and 778 million shares outstanding at 2026 and 2025 1 1

Additional paid-in capital 47,563 45,614

Retained earnings 6,005 5,056

Accumulated other comprehensive income (loss) 209 198

Total Duke Energy Corporation stockholders' equity 54,751 51,842

Noncontrolling Interests 2,112 1,177

Total equity 56,863 53,019

Total Liabilities and Equity $ 201,091 $ 195,736

DUKE ENERGY CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

(In millions)

Six Months Ended June 30,

2026 2025

CASH FLOWS FROM OPERATING ACTIVITIES

Net Income $ 2,722 $ 2,411

Adjustments to reconcile net income to net cash provided by operating activities

1,550 2,629

Net cash provided by operating activities 4,272 5,040

CASH FLOWS FROM INVESTING ACTIVITIES

Net cash used in investing activities (6,209) (6,264)

CASH FLOWS FROM FINANCING ACTIVITIES

Net cash provided by financing activities 2,424 1,245

Net increase (decrease) in cash, cash equivalents and restricted cash 487 21

Cash, cash equivalents and restricted cash at beginning of period 363 421

Cash, cash equivalents and restricted cash at end of period $ 850 $ 442

DUKE ENERGY CORPORATION

CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS

(Unaudited)

Three Months Ended June 30, 2026

(In millions) Electric

Utilities and Infrastructure Gas

Utilities and Infrastructure Other Eliminations/Adjustments Duke Energy

Operating Revenues

Regulated electric $ 7,118 $ — $ — $ (15) $ 7,103

Regulated natural gas — 438 — (20) 418

Nonregulated electric and other 57 11 40 (37) 71

Total operating revenues 7,175 449 40 (72) 7,592

Operating Expenses

Fuel used in electric generation and purchased power 1,933 — — (18) 1,915

Cost of natural gas — 130 — — 130

Operation, maintenance and other 1,339 127 (29) (52) 1,385

Depreciation and amortization 1,514 110 83 (7) 1,700

Property and other taxes 343 28 3 — 374

Impairment of assets and other charges 49 — — — 49

Total operating expenses 5,178 395 57 (77) 5,553

Gains (Losses) on Sales of Other Assets and Other, net 2 — 7 1 10

Operating Income (Loss) 1,999 54 (10) 6 2,049

Other Income and Expenses

Equity in earnings (losses) of unconsolidated affiliates — 4 6 — 10

Other income and expenses, net 156 16 56 (25) 203

Total Other Income and Expenses 156 20 62 (25) 213

Interest Expense 602 61 313 (19) 957

Income (Loss) from Continuing Operations before Income Taxes 1,553 13 (261) — 1,305

Income Tax Expense (Benefit) from Continuing Operations 229 3 (72) — 160

Income (Loss) from Continuing Operations 1,324 10 (189) — 1,145

Less: Net Income Attributable to Noncontrolling Interest 53 — — — 53

Net Income (Loss) Attributable to Duke Energy Corporation 1,271 10 (189) — 1,092

Less: Preferred Dividends — — 15 — 15

Segment Income/Other Net Loss

$ 1,271 $ 10 $ (204) $ — $ 1,077

Discontinued Operations —

Net Income Available to Duke Energy Corporation Common Stockholders

$ 1,077

Segment Income/Other Net Loss $ 1,271 $ 10 $ (204) $ — $ 1,077

Special Items 39 — — — 39

Adjusted Earnings(a)

$ 1,310 $ 10 $ (204) $ — $ 1,116

(a) See Reported to Adjusted Earnings Reconciliation for a detailed reconciliation of Segment Income/Other Net Loss to Adjusted Earnings.

DUKE ENERGY CORPORATION

CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS

(Unaudited)

Six Months Ended June 30, 2026

(In millions) Electric

Utilities and Infrastructure Gas

Utilities and Infrastructure Other Eliminations/Adjustments Duke Energy

Operating Revenues

Regulated electric $ 14,935 $ — $ — $ (29) $ 14,906

Regulated natural gas — 1,759 — (44) 1,715

Nonregulated electric and other 118 23 82 (74) 149

Total operating revenues 15,053 1,782 82 (147) 16,770

Operating Expenses

Fuel used in electric generation and purchased power 4,373 — — (39) 4,334

Cost of natural gas — 655 — — 655

Operation, maintenance and other 3,048 262 (70) (103) 3,137

Depreciation and amortization 3,012 225 166 (14) 3,389

Property and other taxes 736 85 5 — 826

Impairment of assets and other charges 49 — — — 49

Total operating expenses 11,218 1,227 101 (156) 12,390

Gains (Losses) on Sales of Other Assets and Other, net 7 374 12 1 394

Operating Income (Loss) 3,842 929 (7) 10 4,774

Other Income and Expenses

Equity in earnings (losses) of unconsolidated affiliates — 10 7 — 17

Other income and expenses, net 292 28 64 (48) 336

Total Other Income and Expenses 292 38 71 (48) 353

Interest Expense 1,173 128 662 (38) 1,925

Income (Loss) from Continuing Operations before Income Taxes 2,961 839 (598) — 3,202

Income Tax Expense (Benefit) from Continuing Operations 356 297 (160) — 493

Income (Loss) from Continuing Operations 2,605 542 (438) — 2,709

Less: Net Income Attributable to Noncontrolling Interest 80 — — — 80

Net Income (Loss) Attributable to Duke Energy Corporation 2,525 542 (438) — 2,629

Less: Preferred Dividends — — 29 — 29

Segment Income/Other Net Loss $ 2,525 $ 542 $ (467) $ — $ 2,600

Discontinued Operations 13

Net Income Available to Duke Energy Corporation Common Stockholders $ 2,613

Segment Income/Other Net Loss

$ 2,525 $ 542 $ (467) $ — $ 2,600

Special Items 189 (171) — — 18

Adjusted Earnings(a)

$ 2,714 $ 371 $ (467) $ — $ 2,618

(a) See Reported to Adjusted Earnings Reconciliation for a detailed reconciliation of Segment Income/Other Net Loss to Adjusted Earnings.

DUKE ENERGY CORPORATION

CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS

(Unaudited)

Three Months Ended June 30, 2025

(In millions) Electric

Utilities and Infrastructure Gas

Utilities and Infrastructure Other Eliminations/Adjustments Duke Energy

Operating Revenues

Regulated electric $ 6,982 $ — $ — $ (14) $ 6,968

Regulated natural gas — 483 — (21) 462

Nonregulated electric and other 63 10 40 (35) 78

Total operating revenues 7,045 493 40 (70) 7,508

Operating Expenses

Fuel used in electric generation and purchased power 1,898 — — (20) 1,878

Cost of natural gas — 158 — — 158

Operation, maintenance and other 1,594 129 (23) (45) 1,655

Depreciation and amortization 1,402 112 77 (8) 1,583

Property and other taxes 371 41 3 — 415

Impairment of assets and other charges (1) — 5 (1) 3

Total operating expenses 5,264 440 62 (74) 5,692

Gains (Losses) on Sales of Other Assets and Other, net 8 — 6 — 14

Operating Income (Loss) 1,789 53 (16) 4 1,830

Other Income and Expenses

Equity in earnings (losses) of unconsolidated affiliates — 1 9 1 11

Other income and expenses, net 163 13 33 (26) 183

Total Other Income and Expenses 163 14 42 (25) 194

Interest Expense 535 65 318 (21) 897

Income (Loss) from Continuing Operations before Income Taxes 1,417 2 (292) — 1,127

Income Tax Expense (Benefit) from Continuing Operations 200 (4) (77) — 119

Income (Loss) from Continuing Operations 1,217 6 (215) — 1,008

Less: Net Income Attributable to Noncontrolling Interest

23 — — — 23

Net Income (Loss) Attributable to Duke Energy Corporation 1,194 6 (215) — 985

Less: Preferred Dividends — — 13 — 13

Segment Income/Other Net Loss

$ 1,194 $ 6 $ (228) $ — $ 972

Discontinued Operations (1)

Net Income Available to Duke Energy Corporation Common Stockholders

$ 971

DUKE ENERGY CORPORATION

CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS

(Unaudited)

Six Months Ended June 30, 2025

(In millions) Electric

Utilities and Infrastructure Gas

Utilities and Infrastructure Other Eliminations/Adjustments Duke Energy

Operating Revenues

Regulated electric $ 14,061 $ — $ — $ (29) $ 14,032

Regulated natural gas — 1,612 — (45) 1,567

Nonregulated electric and other 124 21 82 (69) 158

Total operating revenues 14,185 1,633 82 (143) 15,757

Operating Expenses

Fuel used in electric generation and purchased power 4,017 — — (40) 3,977

Cost of natural gas — 532 — — 532

Operation, maintenance and other 3,018 254 (21) (97) 3,154

Depreciation and amortization 2,736 219 154 (14) 3,095

Property and other taxes 749 88 6 — 843

Impairment of assets and other charges (1) — 5 (1) 3

Total operating expenses 10,519 1,093 144 (152) 11,604

Gains (Losses) on Sales of Other Assets and Other, net 9 — 11 — 20

Operating Income (Loss)

3,675 540 (51) 9 4,173

Other Income and Expenses

Equity in earnings (losses) of unconsolidated affiliates — 6 15 1 22

Other income and expenses, net 297 26 47 (55) 315

Total Other Income and Expenses 297 32 62 (54) 337

Interest Expense 1,065 130 636 (45) 1,786

Income (Loss) From Continuing Operations Before Income Taxes 2,907 442 (625) — 2,724

Income Tax Expense (Benefit) from Continuing Operations 389 87 (164) — 312

Income (Loss) from Continuing Operations 2,518 355 (461) — 2,412

Less: Net Income Attributable to Noncontrolling Interest 48 — — — 48

Net Income (Loss) Attributable to Duke Energy Corporation 2,470 355 (461) — 2,364

Less: Preferred Dividends — — 27 — 27

Segment Income/Other Net Loss $ 2,470 $ 355 $ (488) $ — $ 2,337

Discontinued Operations (1)

Net Income Available to Duke Energy Corporation Common Stockholders $ 2,336

DUKE ENERGY CORPORATION

CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS

(Unaudited)

June 30, 2026

(In millions) Electric Utilities and Infrastructure Gas

Utilities and Infrastructure

Other

Eliminations/

Adjustments Duke Energy

Current Assets

Cash and cash equivalents $ 331 $ 8 $ 333 $ 1 $ 673

Receivables, net 4,260 208 14 — 4,482

Receivables from affiliated companies 207 103 1,117 (1,427) —

Notes receivable from affiliated companies 486 26 214 (726) —

Inventory 4,551 78 36 — 4,665

Regulatory assets 2,398 162 85 — 2,645

Other 435 32 288 (71) 684

Total current assets 12,668 617 2,087 (2,223) 13,149

Property, Plant and Equipment

Cost 178,175 17,024 2,433 (70) 197,562

Accumulated depreciation and amortization (57,834) (3,536) (956) — (62,326)

Net property, plant and equipment 120,341 13,488 1,477 (70) 135,236

Other Noncurrent Assets

Goodwill 17,380 1,630 — — 19,010

Regulatory assets 13,275 675 461 — 14,411

Nuclear decommissioning trust funds 13,590 — — — 13,590

Operating lease right-of-use assets, net 670 2 494 — 1,166

Investments in equity method unconsolidated affiliates 1 180 151 — 332

Investment in consolidated subsidiaries 582 6 81,435 (82,023) —

Other 2,577 333 1,912 (625) 4,197

Total other noncurrent assets 48,075 2,826 84,453 (82,648) 52,706

Total Assets 181,084 16,931 88,017 (84,941) 201,091

Segment reclassifications, intercompany balances and other (1,413) (138) (83,390) 84,941 —

Segment Assets $ 179,671 $ 16,793 $ 4,627 $ — $ 201,091

DUKE ENERGY CORPORATION

CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY

(Unaudited)

June 30, 2026

(In millions) Electric Utilities and Infrastructure Gas

Utilities and Infrastructure

Other

Eliminations/

Adjustments Duke Energy

Current Liabilities

Accounts payable $ 3,665 $ 293 $ 982 $ — $ 4,940

Accounts payable to affiliated companies 653 60 555 (1,268) —

Notes payable to affiliated companies 187 301 238 (726) —

Notes payable and commercial paper — — 2,330 — 2,330

Taxes accrued 1,022 121 (108) — 1,035

Interest accrued 574 49 276 — 899

Current maturities of long-term debt 4,104 57 2,514 (9) 6,666

Asset retirement obligations 570 — — — 570

Regulatory liabilities 1,343 80 — (1) 1,422

Other 1,554 70 636 (234) 2,026

Total current liabilities 13,672 1,031 7,423 (2,238) 19,888

Long-Term Debt 52,744 4,715 24,845 (62) 82,242

Long-Term Debt Payable to Affiliated Companies 618 7 — (625) —

Other Noncurrent Liabilities

Deferred income taxes 13,203 1,405 (1,273) 9 13,344

Asset retirement obligations 9,108 94 — — 9,202

Regulatory liabilities 14,312 1,019 28 — 15,359

Operating lease liabilities 608 1 359 — 968

Accrued pension and other post-retirement benefit costs (58) 29 377 — 348

Investment tax credits 975 1 — — 976

Other 1,406 117 568 (190) 1,901

Total other noncurrent liabilities 39,554 2,666 59 (181) 42,098

Equity

Total Duke Energy Corporation stockholders' equity 72,386 8,509 55,690 (81,834) 54,751

Noncontrolling interests 2,110 3 — (1) 2,112

Total equity 74,496 8,512 55,690 (81,835) 56,863

Total Liabilities and Equity 181,084 16,931 88,017 (84,941) 201,091

Segment reclassifications, intercompany balances and other (1,413) (138) (83,390) 84,941 —

Segment Liabilities and Equity $ 179,671 $ 16,793 $ 4,627 $ — $ 201,091

ELECTRIC UTILITIES AND INFRASTRUCTURE

CONDENSED CONSOLIDATING SEGMENT INCOME

(Unaudited)

Three Months Ended June 30, 2026

(In millions) Duke

Energy

Carolinas Duke

Energy

Progress Duke

Energy

Florida

Duke

Energy

Ohio(a)

Duke

Energy

Indiana Eliminations/

Other Electric Utilities and Infrastructure

Operating Revenues $ 2,416 $ 1,800 $ 1,666 $ 508 $ 861 $ (76) $ 7,175

Operating Expenses

Fuel used in electric generation and purchased power 632 547 447 145 250 (88) 1,933

Operation, maintenance and other 451 356 231 96 187 18 1,339

Depreciation and amortization 531 396 306 74 202 5 1,514

Property and other taxes 91 22 127 83 19 1 343

Impairment of assets and other charges 27 22 — — — — 49

Total operating expenses 1,732 1,343 1,111 398 658 (64) 5,178

Gains (Losses) on Sales of Other Assets and Other, net — — 1 — — 1 2

Operating Income 684 457 556 110 203 (11) 1,999

Other Income and Expenses, net(b)

72 54 18 4 13 (5) 156

Interest Expense 233 144 127 33 75 (10) 602

Income Before Income Taxes 523 367 447 81 141 (6) 1,553

Income Tax Expense 36 54 91 15 20 13 229

Less: Net Income Attributable to Noncontrolling Interest(c)

— — — — — 53 53

Segment Income $ 487 $ 313 $ 356 $ 66 $ 121 $ (72) $ 1,271

(a) Includes results of the wholly owned subsidiary, Duke Energy Kentucky.

(b) Includes an equity component of allowance for funds used during construction of $44 million for Duke Energy Carolinas, $30 million for Duke Energy Progress, $3 million for Duke Energy Florida, $4 million for Duke Energy Ohio and $7 million for Duke Energy Indiana.

ELECTRIC UTILITIES AND INFRASTRUCTURE

CONDENSED CONSOLIDATING SEGMENT INCOME

(Unaudited)

Six Months Ended June 30, 2026

(In millions) Duke

Energy

Carolinas Duke

Energy

Progress Duke

Energy

Florida

Duke

Energy

Ohio(a)

Duke

Energy

Indiana Eliminations/

Other Electric Utilities and Infrastructure

Operating Revenues $ 5,182 $ 4,101 $ 3,287 $ 1,070 $ 1,827 $ (414) $ 15,053

Operating Expenses

Fuel used in electric generation and purchased power 1,563 1,410 895 318 620 (433) 4,373

Operation, maintenance and other 1,052 857 550 193 374 22 3,048

Depreciation and amortization 1,057 782 602 156 407 8 3,012

Property and other taxes 197 81 250 170 38 — 736

Impairment of assets and other charges 27 22 — — — — 49

Total operating expenses 3,896 3,152 2,297 837 1,439 (403) 11,218

Gains (Losses) on Sales of Other Assets and Other, net 2 1 3 — — 1 7

Operating Income 1,288 950 993 233 388 (10) 3,842

Other Income and Expenses, net(b)

135 97 33 8 24 (5) 292

Interest Expense 450 279 254 67 139 (16) 1,173

Income Before Income Taxes 973 768 772 174 273 1 2,961

Income Tax Expense 50 96 156 31 39 (16) 356

Less: Net Income Attributable to Noncontrolling Interest(c)

— — — — — 80 80

Segment Income

$ 923 $ 672 $ 616 $ 143 $ 234 $ (63) $ 2,525

(a) Includes results of the wholly owned subsidiary, Duke Energy Kentucky.

(b) Includes an equity component of allowance for funds used during construction of $85 million for Duke Energy Carolinas, $58 million for Duke Energy Progress, $6 million for Duke Energy Florida, $7 million for Duke Energy Ohio and $16 million for Duke Energy Indiana.

ELECTRIC UTILITIES AND INFRASTRUCTURE

CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS

(Unaudited)

June 30, 2026

(In millions) Duke

Energy

Carolinas Duke

Energy

Progress Duke

Energy

Florida

Duke

Energy

Ohio(a)

Duke

Energy

Indiana

Eliminations/

Adjustments(b)

Electric Utilities and Infrastructure

Current Assets

Cash and cash equivalents $ 38 $ 244 $ 22 $ 11 $ 16 $ — $ 331

Receivables, net 1,616 1,106 723 362 445 8 4,260

Receivables from affiliated companies 246 106 136 32 30 (343) 207

Notes receivable from affiliated companies 1,122 — — 56 184 (876) 486

Inventory 1,528 1,374 873 186 590 — 4,551

Regulatory assets 1,141 847 170 26 215 (1) 2,398

Other 115 134 70 8 117 (9) 435

Total current assets 5,806 3,811 1,994 681 1,597 (1,221) 12,668

Property, Plant and Equipment

Cost 64,964 46,816 34,555 9,727 22,039 74 178,175

Accumulated depreciation and amortization (21,125) (17,446) (8,936) (2,643) (7,739) 55 (57,834)

Net property, plant and equipment 43,839 29,370 25,619 7,084 14,300 129 120,341

Other Noncurrent Assets

Goodwill — — — 596 — 16,784 17,380

Regulatory assets 4,765 4,246 2,132 379 975 778 13,275

Nuclear decommissioning trust funds 7,765 5,541 283 — — 1 13,590

Operating lease right-of-use assets, net 87 357 192 5 30 (1) 670

Investments in equity method unconsolidated affiliates — — 1 — — — 1

Investment in consolidated subsidiaries 56 11 4 510 1 — 582

Other 1,382 776 546 71 245 (443) 2,577

Total other noncurrent assets 14,055 10,931 3,158 1,561 1,251 17,119 48,075

Total Assets 63,700 44,112 30,771 9,326 17,148 16,027 181,084

Segment reclassifications, intercompany balances and other (1,448) (203) (160) (600) (222) 1,220 (1,413)

Reportable Segment Assets $ 62,252 $ 43,909 $ 30,611 $ 8,726 $ 16,926 $ 17,247 $ 179,671

(a) Includes balances of the wholly owned subsidiary Duke Energy Kentucky.

(b) Includes the elimination of intercompany balances, purchase accounting adjustments, and Duke Energy Indiana Holdco, LLC balances.

ELECTRIC UTILITIES AND INFRASTRUCTURE

CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY

(Unaudited)

June 30, 2026

(In millions) Duke

Energy

Carolinas Duke

Energy

Progress Duke

Energy

Florida

Duke

Energy

Ohio(a)

Duke

Energy

Indiana

Eliminations/

Adjustments(b)

Electric Utilities and Infrastructure

Current Liabilities

Accounts payable $ 1,382 $ 909 $ 683 $ 231 $ 458 $ 2 $ 3,665

Accounts payable to affiliated companies 292 316 239 15 75 (284) 653

Notes payable to affiliated companies — 823 196 44 — (876) 187

Taxes accrued 247 105 253 332 99 (14) 1,022

Interest accrued 227 146 87 42 71 1 574

Current maturities of long-term debt 1,650 1,094 1,357 (17) 27 (7) 4,104

Asset retirement obligations 239 179 1 6 144 1 570

Regulatory liabilities 611 374 64 69 226 (1) 1,343

Other 615 372 346 77 125 19 1,554

Total current liabilities 5,263 4,318 3,226 799 1,225 (1,159) 13,672

Long-Term Debt 20,235 12,909 10,195 3,492 5,523 390 52,744

Long-Term Debt Payable to Affiliated Companies 300 150 — 18 150 — 618

Other Noncurrent Liabilities

Deferred income taxes 4,602 2,923 3,181 899 1,546 52 13,203

Asset retirement obligations 3,585 4,121 170 62 973 197 9,108

Regulatory liabilities 7,914 4,293 772 218 1,141 (26) 14,312

Operating lease liabilities 75 360 144 4 25 — 608

Accrued pension and other post-retirement benefit costs 10 131 82 64 78 (423) (58)

Investment tax credits 347 195 248 5 180 — 975

Other 727 440 160 59 28 (8) 1,406

Total other noncurrent liabilities 17,260 12,463 4,757 1,311 3,971 (208) 39,554

Equity

Total Duke Energy Corporation stockholders equity 20,642 14,272 12,593 3,706 6,279 14,894 72,386

Noncontrolling interests(c)

— — — — — 2,110 2,110

Total equity 20,642 14,272 12,593 3,706 6,279 17,004 74,496

Total Liabilities and Equity 63,700 44,112 30,771 9,326 17,148 16,027 181,084

Segment reclassifications, intercompany balances and other (1,448) (203) (160) (600) (222) 1,220 (1,413)

Reportable Segment Liabilities and Equity $ 62,252 $ 43,909 $ 30,611 $ 8,726 $ 16,926 $ 17,247 $ 179,671

(a) Includes balances of the wholly owned subsidiary Duke Energy Kentucky.

(b) Includes the elimination of intercompany balances, purchase accounting adjustments and Duke Energy Indiana Holdco, LLC balances.

GAS UTILITIES AND INFRASTRUCTURE

CONDENSED CONSOLIDATING SEGMENT INCOME

(Unaudited)

Three Months Ended June 30, 2026

(In millions)

Duke

Energy

Ohio(a)

Piedmont Natural Gas LDC

Midstream Pipelines and Storage(b)

Eliminations/

Adjustments Gas

Utilities and Infrastructure

Operating Revenues $ 157 $ 288 $ 4 $ — $ 449

Operating Expenses

Cost of natural gas 33 97 — — 130

Operation, maintenance and other 36 87 3 1 127

Depreciation and amortization 40 69 1 — 110

Property and other taxes 25 4 — (1) 28

Total operating expenses 134 257 4 — 395

Operating Income (Loss)

23 31 — — 54

Other Income and Expenses

Equity in earnings (losses) of unconsolidated affiliates — — 4 — 4

Other income and expenses, net 2 15 — (1) 16

Total other income and expenses 2 15 4 (1) 20

Interest Expense 19 41 1 — 61

Income (Loss) Before Income Taxes

6 5 3 (1) 13

Income Tax Expense (Benefit)

2 1 1 (1) 3

Segment Income (Loss)

$ 4 $ 4 $ 2 $ — $ 10

(a) Includes results of the wholly owned subsidiary Duke Energy Kentucky.

(b) Primarily earnings from investments in Sabal Trail and Cardinal pipelines, as well as Hardy and Pine Needle storage facilities.

GAS UTILITIES AND INFRASTRUCTURE

CONDENSED CONSOLIDATING SEGMENT INCOME

(Unaudited)

Six Months Ended June 30, 2026

(In millions)

Duke

Energy

Ohio(a)

Piedmont Natural Gas LDC

Midstream Pipelines and Storage(b)

Eliminations/

Adjustments Gas

Utilities and Infrastructure

Operating Revenues $ 474 $ 1,299 $ 9 $ — $ 1,782

Operating Expenses

Cost of natural gas 154 501 — — 655

Operation, maintenance and other 76 180 6 — 262

Depreciation and amortization 79 143 3 — 225

Property and other taxes 55 30 — — 85

Total operating expenses 364 854 9 — 1,227

Gains (Losses) on Sales of Other Assets and Other, net(c)

— 652 6 (284) 374

Operating Income (Loss) 110 1,097 6 (284) 929

Other Income and Expenses, net

Equity in earnings (losses) of unconsolidated affiliates — — 10 — 10

Other income and expenses, net 3 25 — — 28

Other Income and Expenses, net 3 25 10 — 38

Interest Expense 37 89 2 — 128

Income (Loss) Before Income Taxes 76 1,033 14 (284) 839

Income Tax Expense (Benefit) 17 259 21 — 297

Segment Income (Loss) $ 59 $ 774 $ (7) $ (284) $ 542

(a) Includes results of the wholly owned subsidiary Duke Energy Kentucky.

(b) Includes earnings from investments in Sabal Trail and Cardinal pipelines, as well as Hardy and Pine Needle storage facilities.

(c) The gain on sale is $284 million lower at the Gas Utilities and Infrastructure segment level due to higher allocated goodwill related to the Piedmont Tennessee Disposal Group than at Piedmont Natural Gas LDC.

GAS UTILITIES AND INFRASTRUCTURE

CONDENSED CONSOLIDATING BALANCE SHEETS – ASSETS

(Unaudited)

June 30, 2026

(In millions)

Duke

Energy

Ohio(a)

Piedmont Natural Gas LDC Midstream Pipelines and Storage

Eliminations/

Adjustments(b)

Gas

Utilities and Infrastructure

Current Assets

Cash and cash equivalents $ 5 $ — $ 4 $ (1) $ 8

Receivables, net 59 149 — — 208

Receivables from affiliated companies — 104 73 (74) 103

Notes receivable from affiliated companies 32 — — (6) 26

Inventory 44 35 — (1) 78

Regulatory assets 78 84 — — 162

Other — 25 4 3 32

Total current assets 218 397 81 (79) 617

Property, Plant and Equipment

Cost 5,255 11,693 76 — 17,024

Accumulated depreciation and amortization (1,303) (2,216) (17) — (3,536)

Net property, plant and equipment 3,952 9,477 59 — 13,488

Other Noncurrent Assets

Goodwill 324 39 — 1,267 1,630

Regulatory assets 327 296 — 52 675

Operating lease right-of-use assets, net — 1 — 1 2

Investments in equity method unconsolidated affiliates — — 175 5 180

Investment in consolidated subsidiaries — — — 6 6

Other 30 288 16 (1) 333

Total other noncurrent assets 681 624 191 1,330 2,826

Total Assets 4,851 10,498 331 1,251 16,931

Segment reclassifications, intercompany balances and other (32) (106) (103) 103 (138)

Reportable Segment Assets $ 4,819 $ 10,392 $ 228 $ 1,354 $ 16,793

(a) Includes balances of the wholly owned subsidiary Duke Energy Kentucky.

(b) Includes the elimination of intercompany balances and purchase accounting adjustments.

GAS UTILITIES AND INFRASTRUCTURE

CONDENSED CONSOLIDATING BALANCE SHEETS – LIABILITIES AND EQUITY

(Unaudited)

June 30, 2026

(In millions)

Duke

Energy

Ohio(a)

Piedmont Natural Gas LDC Midstream Pipelines and Storage

Eliminations/

Adjustments(b)

Gas

Utilities and Infrastructure

Current Liabilities

Accounts payable $ 61 $ 223 $ 9 $ — $ 293

Accounts payable to affiliated companies 3 118 12 (73) 60

Notes payable to affiliated companies 26 281 — (6) 301

Taxes accrued 54 67 — — 121

Interest accrued 9 40 — — 49

Current maturities of long-term debt 17 40 — — 57

Regulatory liabilities 26 53 — 1 80

Other 3 66 1 — 70

Total current liabilities 199 888 22 (78) 1,031

Long-Term Debt 860 3,762 53 40 4,715

Long-Term Debt Payable to Affiliated Companies 7 — — — 7

Other Noncurrent Liabilities

Deferred income taxes 473 878 53 1 1,405

Asset retirement obligations 68 26 — — 94

Regulatory liabilities 226 783 — 10 1,019

Operating lease liabilities — 1 — — 1

Accrued pension and other post-retirement benefit costs 23 6 — — 29

Investment tax credits — 1 — — 1

Other 35 80 — 2 117

Total other noncurrent liabilities 825 1,775 53 13 2,666

Equity

Total Duke Energy Corporation stockholders' equity 2,960 4,073 200 1,276 8,509

Noncontrolling interests — — 3 — 3

Total equity 2,960 4,073 203 1,276 8,512

Total Liabilities and Equity 4,851 10,498 331 1,251 16,931

Segment reclassifications, intercompany balances and other (32) (106) (103) 103 (138)

Reportable Segment Liabilities and Equity $ 4,819 $ 10,392 $ 228 $ 1,354 $ 16,793

(a) Includes balances of the wholly owned subsidiary Duke Energy Kentucky.

(b) Includes the elimination of intercompany balances and purchase accounting adjustments.

Electric Utilities and Infrastructure

Quarterly Highlights

June 2026

Three Months Ended June 30, Six Months Ended June 30,

2026 2025

Inc. (Dec.)

% Inc. (Dec.)

Weather

Normal(b)

2026 2025 %

Inc. (Dec.)

% Inc. (Dec.)

Weather

Normal(b)

Gigawatt-hour (GWh) Sales(a)

Residential 19,649 19,328 1.7 % 2.1 % 45,054 44,553 1.1 % 0.5 %

Commercial

19,525 19,267 1.3 % 1.7 % 38,596 38,169 1.1 % 1.4 %

Industrial 11,434 11,751 (2.7 %) (0.5 %) 22,172 22,715 (2.4 %) (1.4 %)

Other Energy Sales 124 138 (10.1 %) n/a 254 254 — % n/a

Unbilled Sales 2,697 2,811 (4.1 %) n/a 1,022 995 2.7 % n/a

Total Retail Sales

53,429 53,295 0.3 % 1.3 % 107,098 106,686 0.4 % 0.4 %

Wholesale and Other 11,013 10,866 1.4 % 22,798 22,717 0.4 %

Total Consolidated Electric Sales – Electric Utilities and Infrastructure

64,442 64,161 0.4 % 129,896 129,403 0.4 %

Average Number of Customers (Electric)

Residential 7,638,620 7,520,099 1.6 % 7,627,440 7,509,110 1.6 %

Commercial

1,051,759 1,047,601 0.4 % 1,051,299 1,046,413 0.5 %

Industrial 14,801 15,125 (2.1 %) 14,798 15,215 (2.7 %)

Other Energy Sales 22,612 23,054 (1.9 %) 22,685 23,129 (1.9 %)

Total Retail Customers

8,727,792 8,605,879 1.4 % 8,716,222 8,593,867 1.4 %

Wholesale and Other 57 52 9.6 % 56 52 7.7 %

Total Average Number of Customers – Electric Utilities and Infrastructure

8,727,849 8,605,931 1.4 % 8,716,278 8,593,919 1.4 %

Sources of Electric Energy (GWh)

Generated – Net Output(c)

Coal 9,169 7,785 17.8 % 20,950 19,132 9.5 %

Nuclear 17,959 19,250 (6.7 %) 36,465 38,176 (4.5 %)

Hydro 84 452 (81.4 %) 374 898 (58.4 %)

Natural Gas and Oil 23,037 22,372 3.0 % 44,802 43,925 2.0 %

Renewable Energy 1,310 1,171 11.9 % 2,295 2,012 14.1 %

Total Generation(d)

51,559 51,030 1.0 % 104,886 104,143 0.7 %

Purchased Power and Net Interchange(e)

15,827 16,214 (2.4 %) 31,066 31,166 (0.3 %)

Total Sources of Energy 67,386 67,244 0.2 % 135,952 135,309 0.5 %

Less: Line Loss and Other 2,944 3,083 (4.5 %) 6,056 5,906 2.5 %

Total GWh Sources 64,442 64,161 0.4 % 129,896 129,403 0.4 %

Owned Megawatt (MW) Capacity(c)(f)

Summer 52,048 50,569

Winter 55,820 55,216

Nuclear Capacity Factor (%)(g)

93 99

(a) Except as indicated in footnote (b), represents non-weather-normalized billed sales, with energy delivered but not yet billed (i.e., unbilled sales) reflected as a single amount and not allocated to the respective retail classes.

(b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales).

(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.

Duke Energy Carolinas

Quarterly Highlights

Supplemental Electric Utilities and Infrastructure Information

June 2026

Three Months Ended June 30, Six Months Ended June 30,

2026 2025

Inc. (Dec.)

% Inc. (Dec.)

Weather

Normal(b)

2026 2025 %

Inc. (Dec.)

% Inc. (Dec.)

Weather

Normal(b)

GWh Sales(a)

Residential 6,400 6,165 3.8 % 15,482 15,303 1.2 %

Commercial

7,438 7,265 2.4 % 14,772 14,655 0.8 %

Industrial 4,890 4,977 (1.7 %) 9,396 9,531 (1.4 %)

Other Energy Sales 65 77 (15.6 %) 134 133 0.8 %

Unbilled Sales 935 1,080 (13.4 %) 320 350 (8.6 %)

Total Retail Sales

19,728 19,564 0.8 % 1.6 % 40,104 39,972 0.3 % 0.4 %

Wholesale and Other 2,680 2,604 2.9 % 5,884 5,754 2.3 %

Total Consolidated Electric Sales – Duke Energy Carolinas

22,408 22,168 1.1 % 45,988 45,726 0.6 %

Average Number of Customers

Residential 2,586,496 2,536,178 2.0 % 2,581,223 2,530,372 2.0 %

Commercial

402,857 402,816 — % 402,932 402,377 0.1 %

Industrial 5,739 5,845 (1.8 %) 5,744 5,870 (2.1 %)

Other Energy Sales 10,672 10,803 (1.2 %) 10,686 10,819 (1.2 %)

Total Retail Customers

3,005,764 2,955,642 1.7 % 3,000,585 2,949,438 1.7 %

Wholesale and Other 30 27 11.1 % 28 26 7.7 %

Total Average Number of Customers – Duke Energy Carolinas

3,005,794 2,955,669 1.7 % 3,000,613 2,949,464 1.7 %

Sources of Electric Energy (GWh)

Generated – Net Output(c)

Coal 2,613 1,538 69.9 % 5,544 4,823 14.9 %

Nuclear 10,474 11,363 (7.8 %) 21,881 23,152 (5.5 %)

Hydro (55) 216 (125.5 %) 71 467 (84.8 %)

Natural Gas and Oil 6,770 6,590 2.7 % 13,221 12,470 6.0 %

Renewable Energy 80 87 (8.0 %) 139 144 (3.5 %)

Total Generation(d)

19,882 19,794 0.4 % 40,856 41,056 (0.5 %)

Purchased Power and Net Interchange(e)

3,516 3,432 2.4 % 7,270 6,670 9.0 %

Total Sources of Energy 23,398 23,226 0.7 % 48,126 47,726 0.8 %

Less: Line Loss and Other 990 1,058 (6.4 %) 2,138 2,000 6.9 %

Total GWh Sources 22,408 22,168 1.1 % 45,988 45,726 0.6 %

Owned MW Capacity(c)(f)

Summer 19,842 19,745

Winter 20,934 20,842

Nuclear Capacity Factor (%)(g)

93 100

Heating and Cooling Degree Days

Actual

Heating Degree Days 142 127 11.8 % 1,739 1,770 (1.8 %)

Cooling Degree Days 581 596 (2.5 %) 627 604 3.8 %

Variance from Normal

Heating Degree Days (30.6 %) (38.7 %) (7.9 %) (7.1 %)

Cooling Degree Days 14.5 % 18.5 % 21.6 % 18.2 %

(b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales).

(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.

Duke Energy Progress

Quarterly Highlights

Supplemental Electric Utilities and Infrastructure Information

June 2026

Three Months Ended June 30, Six Months Ended June 30,

2026 2025

Inc. (Dec.)

% Inc. (Dec.)

Weather

Normal(b)

2026 2025 %

Inc. (Dec.)

% Inc. (Dec.)

Weather

Normal(b)

GWh Sales(a)

Residential 3,989 3,886 2.7 % 9,915 9,766 1.5 %

Commercial

3,719 3,695 0.6 % 7,518 7,435 1.1 %

Industrial 2,316 2,375 (2.5 %) 4,508 4,832 (6.7 %)

Other Energy Sales 21 21 — % 42 42 — %

Unbilled Sales 615 669 (8.1 %) 120 (78) 253.8 %

Total Retail Sales

10,660 10,646 0.1 % 1.9 % 22,103 21,997 0.5 % 0.4 %

Wholesale and Other 6,780 6,412 5.7 % 13,624 13,246 2.9 %

Total Consolidated Electric Sales – Duke Energy Progress

17,440 17,058 2.2 % 35,727 35,243 1.4 %

Average Number of Customers

Residential 1,551,088 1,523,129 1.8 % 1,548,103 1,520,911 1.8 %

Commercial

249,885 249,001 0.4 % 249,687 248,667 0.4 %

Industrial 2,940 3,043 (3.4 %) 2,956 3,057 (3.3 %)

Other Energy Sales 2,357 2,391 (1.4 %) 2,363 2,399 (1.5 %)

Total Retail Customers

1,806,270 1,777,564 1.6 % 1,803,109 1,775,034 1.6 %

Wholesale and Other 9 8 12.5 % 9 8 12.5 %

Total Average Number of Customers – Duke Energy Progress

1,806,279 1,777,572 1.6 % 1,803,118 1,775,042 1.6 %

Sources of Electric Energy (GWh)

Generated – Net Output(c)

Coal 1,803 1,773 1.7 % 3,818 4,049 (5.7 %)

Nuclear 7,485 7,887 (5.1 %) 14,584 15,024 (2.9 %)

Hydro 73 179 (59.2 %) 192 317 (39.4 %)

Natural Gas and Oil 5,377 4,996 7.6 % 12,318 11,515 7.0 %

Renewable Energy 102 68 50.0 % 162 118 37.3 %

Total Generation(d)

14,840 14,903 (0.4 %) 31,074 31,023 0.2 %

Purchased Power and Net Interchange(e)

3,257 2,761 18.0 % 5,552 5,253 5.7 %

Total Sources of Energy 18,097 17,664 2.5 % 36,626 36,276 1.0 %

Less: Line Loss and Other 657 606 8.4 % 899 1,033 (13.0 %)

Total GWh Sources 17,440 17,058 2.2 % 35,727 35,243 1.4 %

Owned MW Capacity(c)(f)

Summer 12,865 12,585

Winter 14,067 13,880

Nuclear Capacity Factor (%)(g)

93 96

Heating and Cooling Degree Days

Actual

Heating Degree Days 122 83 47.0 % 1,667 1,606 3.8 %

Cooling Degree Days 678 754 (10.1 %) 731 769 (4.9 %)

Variance from Normal

Heating Degree Days (28.2 %) (51.7 %) (3.2 %) (7.5 %)

Cooling Degree Days 19.3 % 34.2 % 25.7 % 33.7 %

(b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales).

(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.

Duke Energy Florida

Quarterly Highlights

Supplemental Electric Utilities and Infrastructure Information

June 2026

Three Months Ended June 30, Six Months Ended June 30,

2026 2025

Inc. (Dec.)

% Inc. (Dec.)

Weather

Normal(b)

2026 2025 %

Inc. (Dec.)

% Inc. (Dec.)

Weather

Normal(b)

GWh Sales(a)

Residential 5,568 5,622 (1.0 %) 10,357 10,240 1.1 %

Commercial

4,035 3,964 1.8 % 7,468 7,366 1.4 %

Industrial 744 851 (12.6 %) 1,518 1,634 (7.1 %)

Other Energy Sales 6 7 (14.3 %) 13 14 (7.1 %)

Unbilled Sales 766 640 — % 726 515 41.0 %

Total Retail Sales

11,119 11,084 0.3 % 0.8 % 20,082 19,769 1.6 % 0.5 %

Wholesale and Other 623 642 (3.0 %) 976 1,025 (4.8 %)

Total Electric Sales – Duke Energy Florida

11,742 11,726 0.1 % 21,058 20,794 1.3 %

Average Number of Customers

Residential 1,842,536 1,815,652 1.5 % 1,839,988 1,813,649 1.5 %

Commercial

214,645 212,623 1.0 % 214,445 212,229 1.0 %

Industrial 1,592 1,580 0.8 % 1,556 1,598 (2.6 %)

Other Energy Sales 3,474 3,538 (1.8 %) 3,486 3,550 (1.8 %)

Total Retail Customers

2,062,247 2,033,393 1.4 % 2,059,475 2,031,026 1.4 %

Wholesale and Other 13 12 8.3 % 14 13 7.7 %

Total Average Number of Customers – Duke Energy Florida

2,062,260 2,033,405 1.4 % 2,059,489 2,031,039 1.4 %

Sources of Electric Energy (GWh)

Generated – Net Output(c)

Coal 1,083 1,239 (12.6 %) 2,571 1,693 51.9 %

Natural Gas and Oil 9,490 9,621 (1.4 %) 16,519 17,625 (6.3 %)

Renewable Energy 1,116 1,007 10.8 % 1,976 1,736 13.8 %

Total Generation(d)

11,689 11,867 (1.5 %) 21,066 21,054 0.1 %

Purchased Power and Net Interchange(e)

349 343 1.7 % 594 451 31.7 %

Total Sources of Energy 12,038 12,210 (1.4 %) 21,660 21,505 0.7 %

Less: Line Loss and Other 296 484 (38.8 %) 602 711 (15.3 %)

Total GWh Sources 11,742 11,726 0.1 % 21,058 20,794 1.3 %

Owned MW Capacity(c)(f)

Summer 11,929 10,855

Winter 12,840 12,515

Heating and Cooling Degree Days

Actual

Heating Degree Days — — — % 416 359 15.9 %

Cooling Degree Days 1,237 1,261 (1.9 %) 1,504 1,476 1.9 %

Variance from Normal

Heating Degree Days (100.0 %) (100.0 %) 9.6 % (3.8 %)

Cooling Degree Days 16.5 % 17.8 % 18.9 % 15.2 %

(b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales).

(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.

Duke Energy Ohio

Quarterly Highlights

Supplemental Electric Utilities and Infrastructure Information

June 2026

Three Months Ended June 30, Six Months Ended June 30,

2026 2025

Inc. (Dec.)

% Inc. (Dec.)

Weather

Normal(b)

2026 2025 %

Inc. (Dec.)

% Inc. (Dec.)

Weather

Normal(b)

GWh Sales(a)

Residential 1,837 1,813 1.3 % 4,550 4,485 1.4 %

Commercial

2,352 2,317 1.5 % 4,752 4,646 2.3 %

Industrial 1,060 1,126 (5.9 %) 2,171 2,222 (2.3 %)

Other Energy Sales 20 21 (4.8 %) 41 40 2.5 %

Unbilled Sales 199 259 (23.2 %) (1) 138 (100.7 %)

Total Retail Sales

5,468 5,536 (1.2 %) 0.4 % 11,513 11,531 (0.2 %) 0.6 %

Wholesale and Other 362 135 168.1 % 628 247 154.3 %

Total Electric Sales – Duke Energy Ohio

5,830 5,671 2.8 % 12,141 11,778 3.1 %

Average Number of Customers

Residential 842,056 837,594 0.5 % 842,449 837,735 0.6 %

Commercial

76,725 76,391 0.4 % 76,676 76,453 0.3 %

Industrial 1,944 2,051 (5.2 %) 1,958 2,076 (5.7 %)

Other Energy Sales 2,552 2,605 (2.0 %) 2,558 2,629 (2.7 %)

Total Retail Customers

923,277 918,641 0.5 % 923,641 918,893 0.5 %

Wholesale and Other 1 1 — % 1 1 — %

Total Average Number of Customers – Duke Energy Ohio

923,278 918,642 0.5 % 923,642 918,894 0.5 %

Sources of Electric Energy (GWh)

Generated – Net Output(c)

Coal 745 576 29.3 % 1,645 1,355 21.4 %

Natural Gas and Oil 142 98 44.9 % 245 135 81.5 %

Renewable Energy 3 — — % 4 — — %

Total Generation(d)

890 674 32.0 % 1,894 1,490 27.1 %

Purchased Power and Net Interchange(e)

5,525 5,602 (1.4 %) 11,432 11,648 (1.9 %)

Total Sources of Energy 6,415 6,276 2.2 % 13,326 13,138 1.4 %

Less: Line Loss and Other 585 605 (3.3 %) 1,185 1,360 (12.9 %)

Total GWh Sources 5,830 5,671 2.8 % 12,141 11,778 3.1 %

Owned MW Capacity(c)(f)

Summer 1,085 1,080

Winter 1,173 1,173

Heating and Cooling Degree Days

Actual

Heating Degree Days 298 408 (27.0 %) 2,760 2,971 (7.1 %)

Cooling Degree Days 340 344 (1.2 %) 360 351 2.6 %

Variance from Normal

Heating Degree Days (32.8 %) (8.0 %) (7.8 %) (0.7 %)

Cooling Degree Days 0.6 % 1.8 % 5.7 % 3.1 %

(b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales).

(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.

Duke Energy Indiana

Quarterly Highlights

Supplemental Electric Utilities and Infrastructure Information

June 2026

Three Months Ended June 30, Six Months Ended June 30,

2026 2025

Inc. (Dec.)

% Inc. (Dec.)

Weather

Normal(b)

2026 2025 %

Inc. (Dec.)

% Inc. (Dec.)

Weather

Normal(b)

GWh Sales(a)

Residential 1,855 1,842 0.7 % 4,750 4,759 (0.2 %)

Commercial

1,981 2,026 (2.2 %) 4,086 4,067 0.5 %

Industrial 2,424 2,422 0.1 % 4,579 4,496 1.8 %

Other Energy Sales 12 12 — % 24 25 (4.0 %)

Unbilled Sales 182 163 11.7 % (143) 70 (304.3 %)

Total Retail Sales

6,454 6,465 (0.2 %) 1.2 % 13,296 13,417 (0.9 %) 0.1 %

Wholesale and Other 568 1,073 (47.1 %) 1,686 2,445 (31.0 %)

Total Electric Sales – Duke Energy Indiana

7,022 7,538 (6.8 %) 14,982 15,862 (5.5 %)

Average Number of Customers

Residential 816,444 807,546 1.1 % 815,677 806,443 1.1 %

Commercial

107,647 106,770 0.8 % 107,559 106,687 0.8 %

Industrial 2,586 2,606 (0.8 %) 2,584 2,614 (1.1 %)

Other Energy Sales 3,557 3,717 (4.3 %) 3,592 3,732 (3.8 %)

Total Retail Customers

930,234 920,639 1.0 % 929,412 919,476 1.1 %

Wholesale and Other 4 4 — % 4 4 — %

Total Average Number of Customers – Duke Energy Indiana

930,238 920,643 1.0 % 929,416 919,480 1.1 %

Sources of Electric Energy (GWh)

Generated – Net Output(c)

Coal 2,925 2,659 10.0 % 7,372 7,212 2.2 %

Hydro 66 57 15.8 % 111 114 (2.6 %)

Natural Gas and Oil 1,258 1,067 17.9 % 2,499 2,180 14.6 %

Renewable Energy 9 9 — % 14 14 — %

Total Generation(d)

4,258 3,792 12.3 % 9,996 9,520 5.0 %

Purchased Power and Net Interchange(e)

3,180 4,076 (22.0 %) 6,218 7,144 (13.0 %)

Total Sources of Energy 7,438 7,868 (5.5 %) 16,214 16,664 (2.7 %)

Less: Line Loss and Other 416 330 26.1 % 1,232 802 53.6 %

Total GWh Sources 7,022 7,538 (6.8 %) 14,982 15,862 (5.5 %)

Owned MW Capacity(c)(f)

Summer 6,327 6,304

Winter 6,806 6,806

Heating and Cooling Degree Days

Actual

Heating Degree Days 348 430 (19.1 %) 2,927 3,161 (7.4 %)

Cooling Degree Days 343 352 (2.6 %) 359 354 1.4 %

Variance from Normal

Heating Degree Days (29.5 %) (12.3 %) (10.2 %) (2.2 %)

Cooling Degree Days 0.1 % 2.4 % 4.1 % 2.3 %

(b) Represents weather-normal total retail calendar sales (i.e., billed and unbilled sales).

(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.

Gas Utilities and Infrastructure

Quarterly Highlights

June 2026

Three Months Ended June 30, Six Months Ended June 30,

2026 2025 %

Inc. (Dec.) 2026 2025 %

Inc. (Dec.)

Total Sales

Piedmont Natural Gas Local Distribution Company (LDC) throughput (dekatherms)(a)

132,770,392 125,745,045 5.6 % 316,945,789 307,204,892 3.2 %

Duke Energy Midwest LDC throughput (Mcf)(a)

12,023,233 13,882,749 (13.4 %) 48,925,823 54,338,433 (10.0 %)

Average Number of Customers – Piedmont Natural Gas

Residential 907,523 1,090,225 (16.8 %) 971,464 1,091,561 (11.0 %)

Commercial 91,772 109,004 (15.8 %) 98,435 109,426 (10.0 %)

Industrial 755 940 (19.7 %) 814 943 (13.7 %)

Power Generation 19 19 — % 19 19 — %

Total Average Number of Gas Customers – Piedmont Natural Gas

1,000,069 1,200,188 (16.7 %) 1,070,732 1,201,949 (10.9 %)

Average Number of Customers – Duke Energy Midwest

Residential 525,236 523,704 0.3 % 526,881 525,151 0.3 %

Commercial

34,503 34,119 1.1 % 35,136 34,702 1.3 %

Industrial 1,951 2,200 (11.3 %) 1,979 2,267 (12.7 %)

Other 114 117 (2.6 %) 114 117 (2.6 %)

Total Average Number of Gas Customers – Duke Energy Midwest

561,804 560,140 0.3 % 564,110 562,237 0.3 %

(a) Piedmont has a margin decoupling mechanism in North Carolina, weather normalization mechanisms in South Carolina and Tennessee and fixed-price contracts with most power generation customers that significantly eliminate the impact of throughput changes on earnings. Duke Energy Ohio's rate design also serves to offset this impact. On March 31, 2026, Piedmont closed on the sale of its Tennessee business.

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