Duke Energy 424B5 Prospectus supplement for primary offering

Filed Pursuant to Rule 424(b)(5)

RegistrationNo. 333-146483

CALCULATION OF REGISTRATION FEE


Title of each class of securities to be registered	Amount to be registered	Proposed maximum offering price per unit	Proposed maximum aggregate offering price	Amount of registration fee (1)
3.95% Notes due 2014	$ 500,000,000	99.939%	$499,695,000	$27,883
5.05% Notes due 2019	$ 500,000,000	99.623%	$498,115,000	$27,795
Total Notes	$1,000,000,000		$997,810,000	$55,678


(1)		The filing fee, calculated in accordance with Rule 457(r), has been transmitted to the Securities and Exchange Commission in connection with the securities offered by means of this prospectus supplement.

PROSPECTUS SUPPLEMENT

(To Prospectus dated October 3, 2007)

$500,000,000 3.95% Senior Notes due 2014

$500,000,000 5.05% Senior Notes due 2019

Duke Energy Corporation is offering $1,000,000,000 aggregate principal amount of Senior Notes in two series. We are offering $500,000,000 aggregate principal amount of 3.95% Senior Notes due 2014 (the “2014 Notes”) and $500,000,000 aggregate principal amount of 5.05% Senior Notes due 2019 (the “2019 Notes,” and together with the 2014 Notes, the “Notes”). We will pay interest on the 2014 Notes at a rate of 3.95% per annum, payable semi-annually in arrears on March 15 and September 15 of each year, beginning on March 15, 2010. The 2014 Notes will mature as to principal on September 15, 2014. We will pay interest on the 2019 Notes at a rate of 5.05% per annum, payable semi-annually in arrears on March 15 and September 15 of each year, beginning on March 15, 2010. The 2019 Notes will mature as to principal on September 15, 2019.

We may redeem either series of the Notes at our option at any time and from time to time, in whole or in part, as described in this prospectus supplement under the caption “Description of the Notes — Optional Redemption.” The Notes do not have the benefit of any sinking fund. The Notes are unsecured, senior obligations of Duke Energy Corporation. Please read the information provided under the caption “Description of the Notes” in this prospectus supplement and “Description of Debt Securities” in the accompanying prospectus for a more detailed description of the Notes.

Investing in the Notes involves risks. See the section captioned “Risk Factors” in our annual report onForm 10-K for the year ended December 31, 2008 which has been filed with the Securities and Exchange Commission and is incorporated by reference in this prospectus supplement and the accompanying prospectus.


							Proceeds to Duke
				Underwriting			Energy Corporation
	Price to Public(1)			Discount(2)			before expenses(1)

Per 2014 Note		99.939	%		0.60	%		99.339	%
Total 2014 Notes	$	499,695,000		$	3,000,000		$	496,695,000
Per 2019 Note		99.623	%		0.65	%		98.973	%
Total 2019 Notes	$	498,115,000		$	3,250,000		$	494,865,000


(1)		Plus accrued interest, if any, from August 28, 2009, if settlement occurs after that date.

(2)		The underwriters have agreed to make a payment to us in an amount equal to $2,250,000, including in respect of expenses incurred by us in connection with the offering. See “Underwriting.”

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus supplement or the accompanying prospectus. Any representation to the contrary is a criminal offense.

We expect the Notes to be ready for delivery only in book-entry form through the facilities of The Depository Trust Company for the accounts of its participants, including Clearstream Banking, société anonyme, Luxembourg and Euroclear Bank S.A./N.V. on or about August 28, 2009.

Joint Book-Running Managers


BNY Mellon Capital Markets, LLC	Credit Suisse	J.P. Morgan	RBS

Co-Managers


BBVA Securities
	BNP PARIBAS
		Deutsche Bank Securities
			Mitsubishi UFJ Securities
				Mizuho Securities USA Inc.

The date of this prospectus supplement is August 25, 2009.

You should rely only on the information contained in or incorporated by reference in this prospectus supplement and the accompanying prospectus. We have not, and the underwriters have not, authorized anyone to provide you with information that is different. We are not, and the underwriters are not, making an offer to sell these securities in any jurisdiction where the offer is not permitted. You should not assume that the information provided by or incorporated by reference in this prospectus supplement or the accompanying prospectus is accurate as of any date other than the date of the document containing the information.

TABLE OF CONTENTS

Prospectus Supplement


	Page

About this Prospectus Supplement		S-1
Prospectus Supplement Summary		S-2
Risk Factors		S-5
Cautionary Statement Regarding Forward-Looking Information		S-5
Ratio of Earnings to Fixed Charges		S-6
Use of Proceeds		S-7
Description of the Notes		S-7
Certain U.S. Federal Income Tax Considerations forNon-U.S. Holders		S-9
Book-Entry System		S-11
Underwriting		S-15
Experts		S-17
Legal Matters		S-17
Where You Can Find More Information		S-18

Prospectus


	Page

The Company		1
Risk Factors		1
Use of Proceeds		1
Ratio of Earnings to Fixed Charges		2
Description of Capital Stock		2
Description of Debt Securities		4
Plan of Distribution		12
Experts		13
Validity of the Securities		13
Where You Can Find More Information		13

ABOUT THIS PROSPECTUS SUPPLEMENT

This document is in two parts. The first part is this prospectus supplement, which describes the specific terms of these offerings. The second part, the accompanying prospectus, gives more general information, some of which may not apply to these offerings.

If the description of the offerings varies between this prospectus supplement and the accompanying prospectus, you should rely on the information contained in or incorporated by reference in this prospectus supplement.

Unless we have indicated otherwise, or the context otherwise requires, references in this prospectus supplement and the accompanying prospectus to “Duke Energy,” “we,” “us” and “our” or similar terms are to Duke Energy Corporation and its subsidiaries.

S-1

PROSPECTUS SUPPLEMENT SUMMARY

The following summary is qualified in its entirety by, and should be read together with, the more detailed information, including “Risk Factors,” in our annual report onForm 10-K for the year ended December 31, 2008 and the financial statements incorporated by reference in this prospectus supplement and the accompanying prospectus.

Duke Energy Corporation

Duke Energy is one of the largest electric power companies in the United States, and supplies and delivers energy to approximately 4 million U.S. customers. We have approximately 35,000 megawatts of electric generating capacity in the Midwest and the Carolinas, and natural gas distribution services in Ohio and Kentucky. In addition, we own and operate approximately 4,000 megawatts of electric generation in Latin America. Headquartered in Charlotte, North Carolina, Duke Energy is a Fortune 500 company traded on the New York Stock Exchange under the symbol “DUK.”

We operate in the following segments: U.S. Franchised Electric & Gas, Commercial Power and International Energy.

U.S. Franchised Electric & Gas generates, transmits, distributes and sells electricity in central and western North Carolina, western South Carolina and Indiana; and provides combined electric and gas sales, transmission and distribution service in the southwestern portion of Ohio and northern Kentucky.

Commercial Power operates and manages power plants, primarily in the midwestern portion of the United States, and markets electric power and natural gas related to these plants and other contractual positions. It also performs energy risk management activities and provides customized energy solutions.

International Energy operates and manages power generation facilities and engages in sales and marketing of electric power and natural gas outside the United States. Its activities target power generation in Latin America.

We are a Delaware corporation. The address of our principal executive offices is 526 South Church Street, Charlotte, North Carolina28202-1803. Our telephone number is(704) 594-6200.

The foregoing information about Duke Energy is only a general summary and is not intended to be comprehensive. For additional information about Duke Energy, you should refer to the information described under the caption “Where You Can Find More Information.”

S-2

The Offerings


Issuer		Duke Energy Corporation

Securities Offered		We are offering $500,000,000 aggregate principal amount of 3.95% Senior Notes due 2014 and offering $500,000,000 aggregate principal amount of 5.05% Senior Notes due 2019.

Maturities		The 2014 Notes will mature on September 15, 2014. The 2019 Notes will mature on September 15, 2019.

Interest Rates		3.95% per year for the 2014 Notes. 5.05% per year for the 2019 Notes.

Interest Payment Dates		Interest on the Notes shall be payable semi-annually in arrears on March 15 and September 15 of each year, beginning on March 15, 2010.

Ratings		We expect that the Notes will be rated “Baa2” by Moody’s Investors Service, Inc. and “BBB+” by Standard & Poor’s Ratings Services, a division of The McGraw-Hill Companies, Inc. A security rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any time by the assigning rating organization. Each rating should be evaluated independently of any other rating.

Ranking		The Notes will be our direct, unsecured and unsubordinated obligations, ranking equally in priority with all of our existing and future unsecured and unsubordinated indebtedness and senior in right of payment to all of our existing and future subordinated debt. The Notes will be structurally subordinated to all liabilities of our subsidiaries. As of June 30, 2009, we had approximately $2.12 billion of unsecured and unsubordinated obligations that will rank equally in priority with respect to the Notes. Also as of June 30, 2009, our subsidiaries had approximately $13.61 billion of obligations to which the Notes will be structurally subordinated, payment upon approximately $2.41 billion of which is guaranteed by Duke Energy Corporation. Substantially all of such guarantees were granted to the holders of certain unsecured debt of our subsidiary Duke Energy Carolinas, LLC, in connection with changes in our corporate structure relating to the closing of our merger with Cinergy Corp. in 2006. Our Indenture contains no restrictions on the amount of additional indebtedness that we may issue under it.

Optional Redemption		Each series of the Notes is redeemable at the option of Duke Energy Corporation at any time and from time to time, in whole or in part, at a redemption price equal to the greater of (1) 100% of the principal amount of the Notes being redeemed and (2) the sum of the present values of the remaining scheduled payments of principal and interest on the Notes being redeemed (exclusive of interest accrued to the redemption date), discounted to such redemption date on a semi-annual basis (assuming a360-day year consisting of twelve30-day months) at the Treasury Rate plus 25 basis points, in the case of the 2014 Notes, and 25 basis points, in the case of the 2019 Notes, plus, in either case accrued and unpaid interest on the Notes being redeemed to such redemption date. See

S-3


		‘‘Description of the Notes — Optional Redemption” for a description of how the redemption price is calculated.

No Sinking Fund		The Notes do not have the benefit of a sinking fund.

Use of Proceeds		The aggregate net proceeds from the sale of the Notes, after deducting the respective underwriting discounts and related offering expenses and giving effect to the underwriters’ payment to us, will be approximately $993,260,000. The net proceeds from the sale of the Notes will be used to repay all or a portion of our commercial paper as it matures, to fund capital expenditures in our unregulated businesses and for general corporate purposes. As of August 20, 2009, we had approximately $770 million of commercial paper outstanding, with a weighted average interest rate of approximately 0.45%. Our outstanding commercial paper matures no later than 90 days after its date of issue. We issue commercial paper from time to time to fund our working capital and other needs and those of our subsidiaries.

		We expect that the sales of the 2014 Notes and the 2019 Notes will take place concurrently. However, the sales of the 2014 Notes and the 2019 Notes are not conditioned upon each other, and we may consummate the sale of one series and not the other, or consummate the sales at different times.

Book-Entry		Each series of the Notes will be represented by one or more global securities registered in the name of and deposited with or on behalf of The Depository Trust Company (“DTC”) or its nominee. Beneficial interests in the Notes will be represented through book-entry accounts of financial institutions acting on behalf of beneficial owners as direct and indirect participants in DTC. Investors may elect to hold interests in the global securities through either DTC in the United States or Clearstream Banking, société anonyme, Luxembourg (“Clearstream, Luxembourg”) or Euroclear Bank S.A./N.V., as operator of the Euroclear System (the “Euroclear System”) in Europe if they are participants in those systems, or indirectly through organizations which are participants in those systems. This means that you will not receive a certificate for your Notes and Notes will not be registered in your name, except under certain limited circumstances described under the caption “Book-Entry System.”

Trustee		The Bank of New York Mellon Trust Company, N.A.

S-4

RISK FACTORS

You should carefully consider the risk factors under the heading “Risk Factors” in our annual report onForm 10-K for the year ended December 31, 2008 which is incorporated by reference in this prospectus supplement, as well as the other information included or incorporated by reference in this prospectus supplement and the accompanying prospectus, before making an investment decision.

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION

This prospectus supplement and the accompanying prospectus include 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. These forward-looking statements are identified by terms and phrases such as “anticipate,” “believe,” “intend,” “estimate,” “expect,” “continue,” “should,” “could,” “may,” “plan,” “project,” “predict,” “will,” “potential,” “forecast,” “target,” and similar expressions. Forward-looking statements involve risks and uncertainties that may cause actual results to be materially different from the results predicted. Factors that could cause actual results to differ materially from those indicated in any forward-looking statement include, but are not limited to:


	•	State, federal and foreign legislative and regulatory initiatives, including costs of compliance with existing and future environmental requirements;

	•	State, federal and foreign legislative and regulatory initiatives and rulings that affect cost and investment recovery or have an impact on rate structures;

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

	•	Industrial, commercial and residential growth or decline in Duke Energy’s service territories, customer base or customer usage patterns;

	•	Additional competition in electric markets and continued industry consolidation;

	•	Political and regulatory uncertainty in other countries in which Duke Energy conducts business;

	•	The influence of weather and other natural phenomena on Duke Energy’s operations, including the economic, operational and other effects of storms, hurricanes, droughts and tornados;

	•	The timing and extent of changes in commodity prices, interest rates and foreign currency exchange rates;

	•	Unscheduled generation outages, unusual maintenance or repairs and electric transmission system constraints;

	•	The performance of electric generation and of projects undertaken by Duke Energy’s non-regulated businesses;

	•	The results of financing efforts, including Duke Energy’s ability to obtain financing on favorable terms, which can be affected by various factors, including Duke Energy’s credit ratings and general economic conditions;

	•	Declines in the market prices of equity securities and resultant cash funding requirements for Duke Energy’s defined benefit pension plans;

	•	The level of creditworthiness of counterparties to Duke Energy’s transactions;

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

	•	Growth in opportunities for Duke Energy’s business units, including the timing and success of efforts to develop domestic and international power and other projects;

	•	Construction and development risks associated with the completion of Duke Energy’s capital investment projects in existing and new generation facilities, including risks related to financing, obtaining and

S-5


		complying with terms of permits, meeting construction budgets and schedules, and satisfying operating and environmental performance standards, as well as the ability to recover costs from customers in a timely manner;


	•	The effect of accounting pronouncements issued periodically by accounting standard-setting bodies; and

	•	The ability to successfully complete merger, acquisition or divestiture plans.

In light of these risks, uncertainties and assumptions, the events described in the forward-looking statements included or incorporated by reference in this prospectus supplement and the accompanying prospectus might not occur or might occur to a different extent or at a different time than we have described. We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

RATIO OF EARNINGS TO FIXED CHARGES

The ratio of earnings to fixed charges is calculated using the Securities and Exchange Commission guidelines.


	Six Months
	Ended
	June 30,		Year Ended December 31,
	2009		2008		2007		2006		2005		2004
	(dollars in millions)

Earnings (as defined for the fixed charges calculation):
Add:
Pretax income from continuing operations^(a)	$	961	$	1,993	$	2,078	$	1,421	$	1,169	$	723
Fixed charges		424		883		797		1,382		1,159		1,433
Distributed income of equity investees		25		195		147		893		473		140
Deduct:
Preference security dividend requirements of consolidated subsidiaries		—		—		—		27		27		31
Interest capitalized^(b)		35		93		71		56		23		18

Total earnings (as defined for the fixed charges calculation)	$	1,375	$	2,978	$	2,951	$	3,613	$	2,751	$	2,247

Fixed charges:
Interest on debt, including capitalized portions	$	405	$	834	$	756	$	1,311	$	1,096	$	1,365
Estimate of interest within rental expense		19		49		41		44		36		37
Preference security dividend requirements of consolidated subsidiaries		—		—		—		27		27		31

Total fixed charges	$	424	$	883	$	797	$	1,382	$	1,159	$	1,433

Ratio of earnings to fixed charges		3.2		3.4		3.7		2.6		2.4		1.6


(a)		Excludes amounts attributable to noncontrolling interests and income or loss from equity investees.

(b)		Excludes the equity component of Allowance for Funds Used During Construction that are included in Other Income and Expenses in the Consolidated Statements of Operations.

S-6

USE OF PROCEEDS

The aggregate net proceeds from the sale of the Notes, after deducting the respective underwriting discounts and related offering expenses and giving effect to the underwriters’ payment to us, will be approximately $993,260,000. The net proceeds from the sale of the Notes will be used to repay all or a portion of our commercial paper as it matures, to fund capital expenditures in our unregulated businesses and for general corporate purposes. As of August 20, 2009, we had approximately $770 million of commercial paper outstanding, with a weighted average interest rate of approximately 0.45%. Our outstanding commercial paper matures no later than 90 days after its date of issue. We issue commercial paper from time to time to fund our working capital and other needs and those of our subsidiaries.

We expect that the sales of the 2014 Notes and the 2019 Notes will take place concurrently. However, the sales of the 2014 Notes and the 2019 Notes are not conditioned upon each other, and we may consummate the sale of one series and not the other, or consummate the sales at different times.

DESCRIPTION OF THE NOTES

General

The following description of the terms of the 2014 Notes and the 2019 Notes summarizes certain general terms that will apply to the Notes. The 2014 Notes and the 2019 Notes will be issued as separate series of senior debt securities under an Indenture between us and The Bank of New York Mellon Trust Company, N.A. (formerly known as The Bank of New York Trust Company, N.A.), as Trustee, dated as of June 3, 2008, as supplemented from time to time, including by the Third Supplemental Indenture, to be dated as of August , 2009, collectively referred to as the Indenture. This description is not complete, and we refer you to the accompanying prospectus and the Indenture. Defined terms have the meanings assigned to them in the Indenture.

The Notes are issuable in denominations of $2,000 or any integral multiple of $1,000 in excess thereof. The 2014 Notes will be issued in an initial aggregate principal amount of $500,000,000 and the 2019 Notes will be issued in an initial aggregate principal amount of $500,000,000.

We may from time to time, without the consent of existing holders, create and issue further notes having the same terms and conditions as the Notes being offered hereby in all respects, except for issue date, issue price and, if applicable, the first payment of interest thereon and the initial interest accrual date. Additional notes issued in this manner will be consolidated with and will form a single series with the previously outstanding Notes of like tenor.

As used in this prospectus supplement, “business day” means, with respect to the Notes, any day other than a Saturday or Sunday that is neither a legal holiday nor a day on which banking institutions in New York, New York are authorized or required by law, regulation or executive order to close, or a day on which the Corporate Trust Office is closed for business.

Ranking

The Notes will be our direct, unsecured and unsubordinated obligations. The Notes will rank equally in priority with all of our existing and future unsecured and unsubordinated indebtedness and senior in right of payment to all of our existing and future subordinated debt. As of June 30, 2009, we had approximately $2.12 billion of unsecured and unsubordinated obligations that will rank equally in priority with respect to the Notes. Also as of June 30, 2009, our subsidiaries had approximately $13.61 billion of obligations to which the Notes will be structurally subordinated, payment upon approximately $2.41 billion of which is guaranteed by Duke Energy Corporation. Substantially all of such guarantees were granted to the holders of certain unsecured debt of our subsidiary Duke Energy Carolinas, LLC, in connection with changes in our corporate structure relating to the closing of our merger with Cinergy Corp. in 2006. Our Indenture contains no restrictions on the amount of additional indebtedness that we may issue under it.

S-7

Interest

The 2014 Notes will mature on September 15, 2014 and will bear interest at a rate of 3.95% per annum and the 2019 Notes will mature on September 15, 2019 and will bear interest at a rate of 5.05% per annum. Interest shall be payable semi-annually in arrears on March 15 and September 15 of each year, commencing March 15, 2010. If an interest payment date falls on a day that is not a business day, interest will be payable on the next succeeding business day (and without any interest or payment in respect of any such delay) with the same force and effect as if made on such interest payment date. Interest will be paid to the person in whose name each Note is registered at the close of business on the fifteenth calendar day next preceding each semi-annual interest payment date (whether or not a business day). Interest will be calculated on the basis of a360-day year, consisting of twelve30-day months, and will accrue from August 28, 2009 or from the most recent interest payment date to which interest has been paid or duly provided for.

Optional Redemption

We will have the right to redeem the Notes, in whole or in part at any time and from time to time, at a redemption price equal to the greater of (1) 100% of the principal amount of the 2014 Notes or the 2019 Notes to be redeemed and (2) the sum of the present values of the remaining scheduled payments of principal and interest on such Notes being redeemed (exclusive of interest accrued to such redemption date), discounted to such redemption date on a semi-annual basis (assuming a360-day year consisting of twelve30-day months) at the Treasury Rate plus 25 basis points, in the case of the 2014 Notes, and 25 basis points, in the case of the 2019 Notes, plus, in either case accrued and unpaid interest on the Notes being redeemed to such redemption date.

“Comparable Treasury Issue” means the United States Treasury security selected by the Quotation Agent as having an actual or interpolated maturity comparable to the remaining term of the Notes to be redeemed that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of such Notes.

“Comparable Treasury Price” means with respect to any redemption date for Notes, (1) the average of the Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (2) if fewer than four such Reference Treasury Dealer Quotations are obtained, the average of all such Reference Treasury Dealer Quotations.

“Quotation Agent” means one of the Reference Treasury Dealers appointed by us.

“Reference Treasury Dealer” means each of BNY Mellon Capital Markets, LLC, Credit Suisse Securities (USA) LLC, J.P. Morgan Securities Inc. and RBS Securities Inc., plus one other financial institution appointed by us at the time of any redemption or their respective affiliates which are primary U.S. Government securities dealers in the United States (a “Primary Treasury Dealer”), and their respective successors; provided, however, that if any of the foregoing or their affiliates or successors shall cease to be a Primary Treasury Dealer, we shall substitute therefor another Primary Treasury Dealer.

“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Quotation Agent, of the bid and asked prices for the applicable Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Quotation Agent by such Reference Treasury Dealer at 5:00 p.m., New York City time, on the third business day preceding such redemption date.

“Treasury Rate” means, with respect to any redemption date, the rate per annum equal to the semi-annual equivalent yield to maturity or interpolated maturity (on a day count basis) of the Comparable Treasury Issue for the Notes being redeemed, assuming a price for such Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the applicable Comparable Treasury Price for such redemption date.

S-8

Redemption Procedures

We will provide not less than 30 nor more than 60 days’ notice mailed to each registered holder of the Notes to be redeemed. If the redemption notice is given and funds deposited as required, then interest will cease to accrue from and after the redemption date on the Notes or portions of such Notes called for redemption. In the event that any redemption date is not a business day, we will pay the redemption price on the next business day without any interest or other payment due to the delay.

Sinking Fund

There is no provision for a sinking fund applicable to the Notes.

Reports

We will provide the trustee any information, documents or reports required to be filed by Duke Energy Corporation with the SEC under Section 13 or Section 15(d) of the Securities Exchange Act of 1934, or the Exchange Act, within 15 days after the same is filed with the SEC. See “Where You Can Find More Information.”

Ratings

We expect that the Notes will be rated “Baa2” by Moody’s Investors Service, Inc. and “BBB+” by Standard & Poor’s Ratings Services, a division of The McGraw-Hill Companies, Inc. A security rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any time by the assigning rating organization. Each rating should be evaluated independently of any other rating.

CERTAIN U.S. FEDERAL INCOME TAX CONSIDERATIONS FORNON-U.S. HOLDERS

The following discussion summarizes certain U.S. federal income tax considerations relevant to the acquisition, ownership and disposition of the Notes, and does not purport to be a complete analysis of all potential U.S. federal income tax considerations. This discussion only applies to Notes that are held as capital assets, within the meaning of Section 1221 of the Internal Revenue Code of 1986, as amended (the “Code”), and that are purchased in the initial offering at the initial offering price, byNon-U.S. Holders (as defined below). This summary is based on the Code, administrative pronouncements, judicial decisions and regulations of the Treasury Department, changes to any of which subsequent to the date of this prospectus supplement may affect the tax consequences described herein. This discussion does not describe all of the U.S. federal income tax considerations that may be relevant toNon-U.S. Holders in light of their particular circumstances or toNon-U.S. Holders subject to special rules, such as certain financial institutions; tax-exempt organizations; insurance companies; traders or dealers in securities or commodities; persons holding Notes as part of a hedge or other integrated transaction; or certain former citizens or residents of the United States.

Persons considering the purchase of Notes are urged to consult their tax advisors with regard to the application of the U.S. federal income tax laws to their particular situations as well as any tax consequences arising under the laws of any state, local or foreign taxing jurisdiction. Furthermore, this discussion does not describe the effect of U.S. federal estate and gift tax laws or the effect of any applicable foreign, state or local law.

We have not and will not seek any rulings or opinions from the Internal Revenue Service (the “IRS”) or counsel with respect to the matters discussed below. There can be no assurance that the IRS will not take a different position concerning the tax consequences of the acquisition, ownership or disposition of the Notes or that any such position would not be sustained.

Prospective investors should consult their own tax advisors with regard to the application of the U.S. federal income tax considerations discussed below to their particular situations as well as the application of any state, local, foreign or other tax laws, including gift and estate tax laws.

S-9

For purposes of this summary, a“Non-U.S. Holder” means a beneficial owner of a Note that, for U.S. federal income tax purposes, is not (i) an individual that is a citizen or resident of the United States; (ii) a corporation or other entity treated as a corporation for U.S. federal income tax purposes that is created or organized under the laws of the United States, any states thereof or the District of Columbia; (iii) an estate the income of which is subject to U.S. federal income taxation; (iv) a trust if (A) a court within the United States is able to exercise primary control over its administration and one or more United States persons (as defined in the Code) have the authority to control all substantial decisions of such trust, or (B) the trust has made an election under the applicable Treasury regulations to be treated as a United States person. If a partnership, or other entity or arrangement treated as a partnership for U.S. federal income tax purposes, holds Notes, the tax treatment of a partner will generally depend upon the status of the partner and the activities of the partnership. Partners in a partnership holding Notes should consult their tax advisor as to the particular U.S. federal income tax considerations relevant to the acquisition, ownership and disposition of the Notes applicable to them.

Interest

ANon-U.S. Holder generally will not be subject to U.S. federal income or withholding tax on payments of interest on the Notes provided that such holder (A) does not directly or indirectly, actually or constructively, own 10% or more of the total combined voting power of all classes of our stock entitled to vote, (B) is not a controlled foreign corporation that is related to us directly or constructively through stock ownership, (C) is not a bank receiving such interest on an extension of credit made pursuant to a loan agreement entered into in the ordinary course of its trade or business, and (D) satisfies certain certification requirements. Such certification requirements will be met if (x) theNon-U.S. Holder provides its name and address, and certifies on an IRSForm W-8 BEN (or a substantially similar form), under penalties of perjury, that it is not a United States person or (y) a securities clearing organization or certain other financial institutions holding the Notes on behalf of theNon-U.S. Holder certifies on IRSForm W-8IMY, under penalties of perjury, that such certification has been received by it and furnishes us or our paying agent with a copy thereof. In addition, we or our paying agent must not have actual knowledge or reason to know that the beneficial owner of the Notes is a United States person.

If interest on the Notes is not effectively connected with the conduct by theNon-U.S. Holder of a trade or business within the United States, but suchNon-U.S. Holder does not satisfy the other requirements outlined in the preceding sentence, interest on the Notes generally will be subject to U.S. withholding tax at a 30% rate (or lower applicable treaty rate).

If interest on the Notes is effectively connected with the conduct by aNon-U.S. Holder of a trade or business within the United States, and, if certain tax treaties apply, is attributable to a permanent establishment or fixed base within the United States, then theNon-U.S. Holder generally will be subject to U.S. federal income tax on a net income basis at the rate applicable to United States persons generally (and, with respect to corporate holders, may also be subject to a 30% branch profits tax (or a lower applicable treaty rate)). If interest is subject to U.S. federal income tax on a net income basis in accordance with these rules, such interest payments will not be subject to U.S. withholding tax so long as theNon-U.S. Holder provides us or our paying agent with the appropriate documentation (generally an IRSForm W-8ECI).

Sale or Other Taxable Disposition of the Notes

ANon-U.S. Holder generally will not be subject to U.S. federal withholding tax with respect to gain, if any, recognized on the sale or other taxable disposition of the Notes. ANon-U.S. Holder will also generally not be subject to U.S. federal income tax with respect to such gain, unless (i) the gain is effectively connected with the conduct by suchNon-U.S. Holder of a trade or business within the United States, and, if certain tax treaties apply, is attributable to a permanent establishment or fixed base within the United States, or (ii) in the case of aNon-U.S. Holder that is a nonresident alien individual, such holder is present in the United States for 183 or more days in the taxable year of the disposition and certain other conditions are satisfied. In the case described in (i) above, gain or loss recognized on the disposition of such Notes generally will be subject to U.S. federal income taxation in the same manner as if such gain or loss were recognized by a United States

S-10

person, and, in the case of aNon-U.S. Holder that is a foreign corporation, may also be subject to the branch profits tax at a rate of 30% (or a lower applicable treaty rate). In the case described in (ii) above, theNon-U.S. Holder will be subject to a 30% tax on any capital gain recognized on the disposition of the Notes (after being offset by certain U.S. source capital losses).

Information Reporting and Backup Withholding

Information returns will be filed annually with the IRS in connection with payments we make on the Notes. Copies of these information returns may also be made available under the provisions of a specific tax treaty or other agreement to the tax authorities of the country in which theNon-U.S. Holder resides. Unless theNon-U.S. Holder complies with certification procedures to establish that it is not a United States person, information returns may be filed with the IRS in connection with the proceeds from a sale or other disposition and theNon-U.S. Holder may be subject to backup withholding tax (currently at a rate of 28%) on payments on the Notes or on the proceeds from a sale or other disposition of the Notes. The certification procedures required to claim the exemption from withholding tax on interest described above will satisfy the certification requirements necessary to avoid the backup withholding tax as well. The amount of any backup withholding from a payment to aNon-U.S. Holder will be allowed as a credit against theNon-U.S. Holder’s U.S. federal income tax liability and may entitle theNon-U.S. Holder to a refund, provided that the required information is furnished to the IRS in a timely manner.

BOOK-ENTRY SYSTEM

We have obtained the information in this section concerning The Depository Trust Company, or DTC, and its book-entry system and procedures from sources that we believe to be reliable, but we take no responsibility for the accuracy of this information.

Each series of the Notes initially will be represented by one or more fully registered global securities. Each global security will be deposited with, or on behalf of, DTC or any successor thereto and registered in the name of Cede & Co., DTC’s nominee.

Investors may elect to hold interests in the global Notes through either DTC in the United States or Clearstream, Luxembourg or the Euroclear System in Europe if they are participants of such systems, or indirectly through organizations which are participants in such systems. Clearstream, Luxembourg and the Euroclear System will hold interests on behalf of their participants through customers’ securities accounts in Clearstream, Luxembourg’s and the Euroclear System’s names on the books of their respective depositaries, which in turn will hold such interests in customers’ securities accounts in the depositaries’ names on the books of DTC. Citibank N.A. will act as depositary for Clearstream, Luxembourg and JPMorgan Chase Bank, N.A. will act as depositary for the Euroclear System (in such capacities, the “U.S. Depositaries”).

You may hold your interests in a global security in the United States through DTC, either as a participant in such system or indirectly through organizations which are participants in such system. So long as DTC or its nominee is the registered owner of the global securities representing the Notes, DTC or such nominee will be considered the sole owner and holder of the Notes for all purposes of the Notes and the indenture governing the Notes. Except as provided below, owners of beneficial interests in the Notes will not be entitled to have the Notes registered in their names, will not receive or be entitled to receive physical delivery of the Notes in definitive form and will not be considered the owners or holders of the Notes under the indenture governing the Notes, including for purposes of receiving any reports that we or the Trustee deliver pursuant to the indenture governing the Notes. Accordingly, each person owning a beneficial interest in a Note must rely on the procedures of DTC or its nominee and, if such person is not a participant, on the procedures of the participant through which such person owns its interest, in order to exercise any rights of a holder of Notes.

Unless and until we issue the Notes in certificated form under the limited circumstances described below under the heading “— Certificated Notes”:


	•	you will not be entitled to receive physical delivery of a certificate representing your interest in the Notes;

S-11


	•	all references in this prospectus supplement or in the accompanying prospectus to actions by holders will refer to actions taken by DTC upon instructions from its direct participants; and

	•	all references in this prospectus supplement or the accompanying prospectus to payments and notices to holders will refer to payments and notices to DTC or Cede & Co., as the registered holder of the Notes, for distribution to you in accordance with DTC procedures.

The Depository Trust Company

DTC will act as securities depositary for the Notes. The Notes will be issued as fully registered securities registered in the name of Cede & Co. DTC is:


	•	a limited-purpose trust company organized under the New York Banking Law;

	•	a “banking organization” under the New York Banking Law;

	•	a member of the Federal Reserve System;

	•	a “clearing corporation” under the New York Uniform Commercial Code; and

	•	a “clearing agency” registered under the provision of Section 17A of the Exchange Act.

DTC is a limited-purpose trust company organized under the New York Banking Law, a “banking organization” within the meaning of the New York Banking Law, a member of the Federal Reserve System, a “clearing corporation” within the meaning of the New York Uniform Commercial Code, and a “clearing agency” registered pursuant to the provisions of Section 17A of the Exchange Act. DTC holds securities that its direct participants deposit with DTC. DTC also facilitates the settlement among participants of securities transactions, such as transfers and pledges, in deposited securities through electronic computerized book-entry changes in direct participants’ accounts, thereby eliminating the need for physical movement of securities certificates.

Direct participants include securities brokers and dealers, banks, trust companies, clearing corporations and certain other organizations. DTC is a wholly-owned subsidiary of The Depository Trust & Clearing Corporation (“DTCC”). DTCC, in turn is owned by a number of direct participants of DTC and members of the National Securities Clearing Corporation, Fixed Income Clearing Corporation and Emerging Markets Clearing Corporation (which are also subsidiaries of DTCC), as well as by the New York Stock Exchange, Inc., the American Stock Exchange LLC and the Financial Industry Regulatory Authority, Inc. Access to the DTC system is also available to indirect participants such as securities brokers and dealers, banks and trust companies that clear transactions through or maintain a custodial relationship with a direct participant, either directly or indirectly. The rules applicable to DTC and its participants are on file with the SEC. More information about DTC can be found at www.dtcc.com.

If you are not a direct participant or an indirect participant and you wish to purchase, sell or otherwise transfer ownership of, or other interests in the Notes, you must do so through a direct participant or an indirect participant. DTC agrees with and represents to DTC participants that it will administer its book-entry system in accordance with its rules and by-laws and requirements of law. The SEC has on file a set of the rules applicable to DTC and its direct participants.

Purchases of the Notes under DTC’s system must be made by or through direct participants, which will receive a credit for the Notes on DTC’s records. The ownership interest of each beneficial owner is in turn to be recorded on the records of direct participants and indirect participants. Beneficial owners will not receive written confirmation from DTC of their purchase, but beneficial owners are expected to receive written confirmations providing details of the transaction, as well as periodic statements of their holdings, from the direct or indirect participants through which such beneficial owners entered into the transaction. Transfers of ownership interests in the Notes are to be accomplished by entries made on the books of direct and indirect participants acting on behalf of beneficial owners. Beneficial owners will not receive physical delivery of certificates representing their ownership interests in the Notes, except as provided below in “— Certificated Notes.”

S-12

To facilitate subsequent transfers, all Notes deposited with DTC are registered in the name of DTC’s nominee, Cede & Co. The deposit of Notes with DTC and their registration in the name of Cede & Co. has no effect on beneficial ownership. DTC has no knowledge of the actual beneficial owners of the Notes. DTC’s records reflect only the identity of the direct participants to whose accounts such Notes are credited, which may or may not be the beneficial owners. The participants will remain responsible for keeping account of their holdings on behalf of their customers.

Conveyance of notices and other communications by DTC to direct participants, by direct participants to indirect participants and by direct and indirect participants to beneficial owners will be governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect from time to time.

Book-Entry Format

Under the book-entry format, the Trustee will pay interest and principal payments to Cede & Co., as nominee of DTC. DTC will forward the payment to the direct participants, who will then forward the payment to the indirect participants or to the beneficial owners. You may experience some delay in receiving your payments under this system.

DTC is required to make book-entry transfers on behalf of its direct participants and is required to receive and transmit payments of principal, premium, if any, and interest on the Notes. Any direct participant or indirect participant with which you have an account is similarly required to make book-entry transfers and to receive and transmit payments with respect to Notes on your behalf. We and the Trustee have no responsibility or liability for any aspect of the records relating to or payments made on account of beneficial ownership interests in the Notes or for maintaining, supervising or reviewing any records relating to such beneficial ownership interests.

The Trustee will not recognize you as a holder of any Notes under the indenture governing the Notes and you can only exercise the rights of a holder indirectly through DTC and its direct participants. DTC has advised us that it will only take action regarding a Note if one or more of the direct participants to whom the Note is credited direct DTC to take such action. DTC can only act on behalf of its direct participants. Your ability to pledge Notes to indirect participants, and to take other actions, may be limited because you will not possess a physical certificate that represents your Notes.

Certificated Notes

Unless and until they are exchanged, in whole or in part, for Notes in definitive form in accordance with the terms of the Notes, the Notes may not be transferred except as a whole by DTC to a nominee of DTC; as a whole by a nominee of DTC to DTC or another nominee of DTC; or as a whole by DTC or nominee of DTC to a successor of DTC or a nominee of such successor.

We will issue Notes to you or your nominees, in fully certificated registered form, rather than to DTC or its nominees, only if:


	•	DTC notifies us that it is no longer willing or able to discharge its responsibilities properly or DTC is no longer a registered clearing agency under the Exchange Act, and we are unable to locate a qualified successor within 90 days;

	•	an event of default has occurred and is continuing under the indenture governing the Notes and beneficial owners representing a majority in aggregate principal amount of the applicable series of book-entry Notes represented by global securities advise DTC to cease acting as depositary; or

	•	we, at our option, and subject to DTC procedures, elect to terminate use of the book-entry system through DTC.

If any of the above events occurs, DTC is required to notify all direct participants that Notes in fully certificated registered form are available through DTC. DTC will then surrender the global security representing the Notes along with instructions for re-registration. The Trustee will re-issue the Notes in fully certificated

S-13

registered form and will recognize the registered holders of the certificated Notes as holders under the indenture governing the Notes.

Global Clearance and Settlement Procedures

Initial settlement for the Notes will be made in immediately available funds. Secondary market trading between DTC participants will occur in the ordinary way in accordance with DTC rules and will be settled in immediately available funds using DTC’sSame-Day Funds Settlement System. Secondary market trading between Clearstream, Luxembourg participantsand/or Euroclear System participants will occur in the ordinary way in accordance with the applicable rules and operating procedures of Clearstream, Luxembourg and the Euroclear System, as applicable.

Cross-market transfers between persons holding directly or indirectly through DTC on the one hand, and directly or indirectly through Clearstream, Luxembourg participants or Euroclear System participants on the other, will be effected through DTC in accordance with DTC rules on behalf of the relevant European international clearing system by its U.S. Depositary; however, such cross-market transactions will require delivery of instructions to the relevant European international clearing system by the counterparty in such system in accordance with its rules and procedures and within its established deadlines (European time). The relevant European international clearing system will, if the transaction meets its settlement requirements, deliver instructions to its U.S. Depositary to take action to effect final settlement on its behalf by delivering or receiving securities in DTC, and making or receiving payment in accordance with normal procedures forsame-day funds settlement applicable to DTC. Clearstream, Luxembourg participants and Euroclear System participants may not deliver instructions directly to their respective U.S. Depositaries.

Because of time-zone differences, credits of Notes received in Clearstream, Luxembourg or the Euroclear System as a result of a transaction with a DTC participant will be made during subsequent securities settlement processing and dated the business day following the DTC settlement date. Such credits or any transactions in such Notes settled during such processing will be reported to the relevant Euroclear System participant or Clearstream, Luxembourg participant on such business day. Cash received in Clearstream, Luxembourg or the Euroclear System as a result of sales of the Notes by or through a Clearstream, Luxembourg participant or a Euroclear System participant to a DTC participant will be received with value on the DTC settlement date but will be available in the relevant Clearstream, Luxembourg or the Euroclear System cash account only as of the business day following settlement in DTC.

Although DTC, Clearstream, Luxembourg and the Euroclear System have agreed to the foregoing procedures in order to facilitate transfers of Notes among participants of DTC, Clearstream, Luxembourg and the Euroclear System, they are under no obligation to perform or continue to perform such procedures and such procedures may be discontinued or changed at any time.

S-14

UNDERWRITING

We have entered into an underwriting agreement with respect to the Notes with the underwriters listed below, for which BNY Mellon Capital Markets, LLC, Credit Suisse Securities (USA) LLC, J.P. Morgan Securities Inc. and RBS Securities Inc. are acting as representatives. Subject to certain conditions, each of the underwriters has severally agreed to purchase the principal amounts of Notes indicated in the following table:


	Principal Amount		Principal Amount
	of		of
Name	2014 Notes		2019 Notes

BNY Mellon Capital Markets, LLC	$	100,000,000	$	100,000,000
Credit Suisse Securities (USA) LLC		100,000,000		100,000,000
J.P. Morgan Securities Inc.		100,000,000		100,000,000
RBS Securities Inc.		100,000,000		100,000,000
BBVA Securities Inc.	$	20,000,000	$	20,000,000
BNP Paribas Securities Corp.	$	20,000,000	$	20,000,000
Deutsche Bank Securities Inc.	$	20,000,000	$	20,000,000
Mitsubishi UFJ Securities (USA), Inc.	$	20,000,000	$	20,000,000
Mizuho Securities USA Inc.	$	20,000,000	$	20,000,000

Total	$	500,000,000	$	500,000,000

Sale of the Notes by BNY Mellon Capital Markets, LLC will be effected by Broadpoint Capital, Inc., as its distribution agent.

The underwriting agreement provides that the obligations of the several underwriters to pay for and accept delivery of the Notes are subject to certain conditions, including the receipt of legal opinions relating to certain matters. The underwriters must purchase all the 2014 Notes or the 2019 Notes, respectively, if they purchase any of the 2014 Notes or the 2019 Notes. However, the sales of the 2014 Notes and the 2019 Notes are not conditioned upon each other, and we may consummate the sale of one series and not the other or consummate the sales at different times. If an underwriter defaults, the underwriting agreement provides that the purchase commitments of the nondefaulting underwriters may be increased or the underwriting agreement may be terminated.

We have agreed to indemnify the underwriters against certain liabilities, including liabilities under the Securities Act of 1933 as amended, or to contribute to payments the underwriters may be required to make in respect of any of these liabilities.

The underwriters are offering the Notes, subject to prior sale, when, as and if issued to and accepted by them, subject to approval of legal matters by their counsel, including the validity of the Notes, and other conditions contained in the underwriting agreement, such as the receipt by the underwriters of officers’ certificates and legal opinions. The underwriters reserve the right to withdraw, cancel or modify offers to the public and to reject orders in whole or in part.

Commissions and Discounts

The Notes sold by the underwriters to the public will initially be offered at the initial prices to the public set forth on the cover of this prospectus supplement and may be offered to certain dealers at those prices less a concession not in excess of (i) 0.35% of the aggregate principal amount of the 2014 Notes and (ii) 0.40% of the aggregate principal amount of the 2019 Notes. The underwriters may allow, and those dealers may reallow, a discount not in excess of (i) 0.25% of the aggregate principal amount of the 2014 Notes and (ii) 0.25% of the aggregate principal amount of the 2019 Notes to certain other dealers. If all the Notes are not sold at the initial prices to public, the underwriters may change the offering prices and the other selling terms.

S-15

The expenses of the offerings, not including the underwriting discounts, are estimated to be approximately $550,000. The underwriters have agreed to make a payment to us in an amount equal to $2,250,000, including in respect of expenses incurred by us in connection with the offerings.

New Issues of Securities

The Notes are new issues of securities with no established trading market. We have been advised by the underwriters that the underwriters intend to make a market in each series of the Notes, but they are not obligated to do so and may discontinue market making at any time without notice. No assurance can be given as to the liquidity of any trading markets for the Notes.

Price Stabilization, Short Positions and Penalty Bid

In connection with the offerings, the underwriters may engage in transactions that stabilize, maintain, or otherwise affect the prices of the Notes. These transactions may include short sales, stabilizing transactions and purchases to cover positions created by short sales. Short sales involve the sale by the underwriters of a greater aggregate principal amount of Notes than they are required to purchase in the offerings. Stabilizing transactions consist of certain bids or purchases made for the purpose of preventing or retarding a decline in the market prices of the Notes while the offerings are in process.

These activities by the underwriters may stabilize, maintain or otherwise affect the market prices of the Notes. As a result, the prices of the Notes may be higher than the prices that otherwise might exist in the open market. If these activities are commenced, they may be discontinued by the underwriters at any time. These transactions may be effected in the over-the-counter market or otherwise.

The underwriters also may impose a penalty bid. This occurs when a particular underwriter repays to the underwriters a portion of the underwriting discount received by it because the representatives have repurchased Notes sold by or for the account of such underwriter in stabilizing or short covering transactions.

Other Relationships

In the ordinary course of their respective businesses, some of the underwritersand/or their affiliates have in the past and may in the future provide us and our subsidiaries and affiliates with financial advisory and other services for which they have and in the future will receive customary fees.

UK Selling Restrictions

Each underwriter has represented and agreed that:


	(a)	it has only communicated or caused to be communicated and will only communicate or cause to be communicated an invitation or inducement to engage in investment activity (within the meaning of Section 21 of the Financial Services and Markets Act (the “FSMA”) received by it in connection with the issue or sale of the Notes in circumstances in which Section 21(1) of the FSMA does not apply to us; and


	(b)	it has complied and will comply with all applicable provisions of the FSMA with respect to anything done by it in relation to the Notes in, from or otherwise involving the United Kingdom.

EEA Selling Restrictions

In relation to each Member State of the European Economic Area which has implemented the Prospectus Directive (each, a “Relevant Member State”), each underwriter has represented and agreed that with effect from and including the date on which the Prospectus Directive is implemented in that Relevant Member State (the “Relevant Implementation Date”) it has not made and will not make an offer of Notes which are the

S-16

subject of the offerings contemplated by this prospectus supplement to the public in that Relevant Member State other than:


	(a)	to legal entities which are authorized or regulated to operate in the financial markets or, if not so authorized or regulated, whose corporate purpose is solely to invest in securities;


	(b)	to any legal entity which has two or more of (1) an average of at least 250 employees during the last financial year; (2) a total balance sheet of more than €43,000,000; and (3) an annual net turnover of more than €50,000,000, as shown in its last annual or consolidated accounts;


	(c)	to fewer than 100 natural or legal persons (other than qualified investors as defined in the Prospectus Directive) subject to obtaining the prior consent of the lead underwriters; or


	(d)	in any other circumstances falling within Article 3(2) of the Prospectus Directive,

provided that no such offer of Notes shall require us or any underwriter to publish a prospectus pursuant to Article 3 of the Prospectus Directive or supplement a prospectus pursuant to Article 16 of the Prospectus Directive.

For the purposes of this provision, the expression an “offer of Notes to the public” in relation to any Notes in any Relevant Member State means the communication in any form and by any means of sufficient information on the terms of the offer and the Notes to be offered so as to enable an investor to decide to purchase or subscribe the Notes, as the same may be varied in that Member State by any measure implementing the Prospectus Directive in that Member State and the expression “Prospectus Directive” means Directive 2003/71/EC and includes any relevant implementing measure in each Relevant Member State.

EXPERTS

The consolidated financial statements and the related financial statement schedules, incorporated in this prospectus supplement by reference from Duke Energy Corporation’s Annual Report onForm 10-K for the year ended December 31, 2008, and the effectiveness of Duke Energy Corporation’s internal control over financial reporting have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report, which is incorporated herein by reference (which report (1) expresses an unqualified opinion on the financial statements and financial statement schedules and (2) expresses an unqualified opinion on the effectiveness of internal control over financial reporting). Such financial statements and financial statement schedules have been so incorporated in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

The consolidated financial statements and the related financial statement schedule of DCP Midstream, LLC as of and for the years ended December 31, 2006 and 2005, incorporated in this prospectus supplement by reference from Duke Energy Corporation’s Annual Report onForm 10-K for the year ended December 31, 2008, have been audited by Deloitte & Touche LLP, independent auditors, as stated in their report, which is incorporated herein by reference, and has been so incorporated in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

LEGAL MATTERS

The validity of the Notes will be passed upon for Duke Energy Corporation by Robert T. Lucas III, Esq., who is Duke Energy Corporation’s Associate General Counsel and Assistant Secretary. Certain legal matters with respect to the offerings of the Notes will be passed upon for Duke Energy Corporation by Robinson, Bradshaw & Hinson, P.A., Charlotte, North Carolina and for the underwriters by Sidley Austin LLP, New York, New York.

S-17

WHERE YOU CAN FIND MORE INFORMATION

We are subject to the informational requirements of the Exchange Act and, in accordance therewith, file annual, quarterly and current reports and other information with the Securities and Exchange Commission, or the SEC. Such reports and other information can be inspected and copied at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. You may also obtain copies of these documents at prescribed rates from the Public Reference Section of the SEC at its Washington, D.C. address. Please call the SEC at1-800-SEC-0330 for further information. Our filings with the SEC, as well as additional information about us are also available to the public through our website athttp://www.duke-energy.com and are made available as soon as reasonably practicable after such material is filed with or furnished to the SEC. The information on our website is not a part of this prospectus supplement or the accompanying prospectus. Our filings are also available to the public through the SEC website athttp://www.sec.gov.

The SEC allows us to “incorporate by reference” into this prospectus supplement the information we file with it, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be a part of this prospectus supplement, and information that we file later with the SEC will automatically update and supersede this information. This prospectus supplement incorporates by reference the documents incorporated in the accompanying prospectus at the time the registration statement became effective and all later documents filed with the SEC, in all cases as updated and superseded by later filings with the SEC. We incorporate by reference the documents listed below and any future documents filed by Duke Energy Corporation with the SEC under Section 13(a), 13(c), 14 or 15(d) of the Exchange Act until the offerings are completed.


	•	Annual Report onForm 10-K for the year ended December 31, 2008;

	•	Quarterly Report onForm 10-Q for the quarterly periods ended March 31, 2009 and June 30, 2009; and

	•	Current reports onForm 8-K filed January 16, 2009; January 26, 2009; February 9, 2009; February 25, 2009; June 16, 2009; June 26, 2009; and July 9, 2009.

We will provide you without charge a copy of these filings, other than any exhibits unless the exhibits are specifically incorporated by reference in this prospectus supplement. You may request a copy by writing us at the following address or telephoning one of the following numbers:

Investor Relations Department
P.O. Box 1005
Charlotte, North Carolina 28201
(704) 382-3853 or(800) 488-3853 (toll-free)

S-18

Prospectus

DUKE ENERGY CORPORATION

Common Stock

Debt Securities

From time to time, we may offer the securities described in the prospectus separately or together in any combination, in one or more classes or series, in amounts, at prices and on terms that we will determine at the time of the offering.

We will provide specific terms of these offerings and securities in supplements to this prospectus. You should read carefully this prospectus, the information incorporated by reference in this prospectus and any prospectus supplement before you invest. This prospectus may not be used to offer or sell any securities unless accompanied by a prospectus supplement.

Our common stock is listed on the New York Stock Exchange, or NYSE, under the trading symbol “DUK.”

Investing in our securities involves risks. You should carefully consider the information in the section entitled “Risk Factors” contained in our periodic reports filed with the Securities and Exchange Commission and incorporated by reference into this prospectus before you invest in any of our securities.

We may offer and sell the securities directly, through agents we select from time to time or to or through underwriters or dealers we select. If we use any agents, underwriters or dealers to sell the securities, we will name them and describe their compensation in a prospectus supplement. The price to the public of those securities and the net proceeds we expect to receive from that sale will also be set forth in a prospectus supplement.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus is October 3, 2007.

Table of Contents


	Page

The Company		1
Risk Factors		1
Use of Proceeds		1
Ratio of Earnings to Fixed Charges		2
Description of Capital Stock		2
Description of Debt Securities		4
Plan of Distribution		12
Experts		13
Validity of the Securities		13
Where You Can Find More Information		13

REFERENCES TO ADDITIONAL INFORMATION

This prospectus incorporates important business and financial information about us from other documents that are not included in or delivered with this prospectus. This information is available for you to review at the SEC’s public reference room located at 100 F Street, N.E., Room 1580, Washington, DC 20549, and through the SEC’s website,www.sec.gov.You can also obtain those documents incorporated by reference in this prospectus by requesting them in writing or by telephone from the company at the following address and telephone number:

Duke Energy

526 South Church Street

Charlotte, North Carolina 28202

(800) 488-3853

Attention: Investor Relations

www.duke-energy.com/investors

See “Where You Can Find More Information” beginning on page 9.

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that Duke Energy filed with the SEC utilizing a “shelf” registration process. Under the shelf registration process, we are registering an unspecified amount of our common stock and debt securities, and may issue any of such securities in one or more offerings.

This prospectus provides general descriptions of the securities we may offer. Each time securities are sold, a prospectus supplement will provide specific information about the terms of that offering. The prospectus supplement may also add, update or change information contained in this prospectus. The registration statement filed with the SEC includes exhibits that provide more details about the matters discussed in this prospectus. You should read this prospectus, the related exhibits filed with the SEC and any prospectus supplement, together with the additional information described under the caption “Where You Can Find More Information.”

Unless we have indicated otherwise, or the context otherwise requires, references in this prospectus to “Duke Energy,” “we,” “us” and “our” or similar terms are to Duke Energy Corporation and its subsidiaries.

FORWARD-LOOKING STATEMENTS

This prospectus and the information incorporated by reference in this prospectus include forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. These forward-looking statements are based on our management’s beliefs and assumptions and on information currently available to us. Forward-looking statements include information concerning our possible or assumed future results of operations and statements preceded by, followed by or that include the words “may,” “will,” “could,” projects,” “believes,” “expects,” “anticipates,” “intends,” “plans,” “estimates” or similar expressions.

Forward-looking statements involve risks, uncertainties and assumptions. Actual results may differ materially from those expressed in these forward-looking statements. Factors that could cause actual results to differ materially from these forward-looking statements include, but are not limited to, those discussed elsewhere in this prospectus and the documents incorporated by reference in this prospectus. You should not put undue reliance on any forward-looking statements. We do not have any intention or obligation to update forward-looking statements after we distribute this prospectus.

THE COMPANY

Duke Energy Corporation (“Duke Energy”) is one of the largest electric power companies in the United States, and supplies and delivers energy to approximately 4 million U.S. customers. We have approximately 37,000 megawatts of electric generating capacity in the Midwest and the Carolinas, and natural gas distribution services in Ohio and Kentucky. In addition, we own and operate approximately 4,000 megawatts of electric generation in Latin America, and we are a joint-venture partner in a U.S. real estate company. Headquartered in Charlotte, N.C., Duke Energy is a Fortune 500 company traded on the New York Stock Exchange under the symbol “DUK.” We are a Delaware corporation, and our principal executive offices are located at 526 South Church Street, Charlotte, North Carolina,28202-1803. Our telephone number is(704) 594-6200.

We have the following segments: U.S. Franchised Electric & Gas, Commercial Power, Duke Energy International and Crescent Resources, LLC (“Crescent”).

Commercial Power operates and manages power plants, primarily in the Midwestern portion of the U.S., and markets electric power and natural gas related to these plants and other contractual positions. It also performs energy risk management activities and provides customized energy solutions.

Duke Energy International operates and manages power generation facilities and engages in sales and marketing of electric power and natural gas outside the United States. Its activities target power generation in Latin America.

Crescent is a joint venture of which we own approximately 50 per cent. It develops and manages high-quality commercial, residential and multi-family real estate projects primarily in the Southeastern and Southwestern United States. Some of these projects are developed and managed through joint ventures. Crescent also manages “legacy” land holdings in North and South Carolina.

RISK FACTORS

Investing in our securities involves risks. Before purchasing any securities we offer, you should carefully consider the risk factors that are incorporated by reference herein from the section captioned “Risk Factors” in ourForm 10-K for the year ended December 31, 2006, together with all of the other information included in this prospectus and any prospectus supplement and any other information that we have incorporated by reference, including filings made with the Securities and Exchange Commission (the “SEC”) subsequent to the date hereof. Any of these risks, as well as other risks and uncertainties, could harm our financial condition, results of operations or cash flows.

USE OF PROCEEDS

Unless otherwise set forth in a prospectus supplement, we intend to use the net proceeds of any offering of securities sold by us for general corporate purposes, which may include acquisitions, repayment of debt, capital expenditures and working capital. When a particular series of securities is offered, the prospectus supplement relating to that offering will set forth our intended use of the net proceeds received from the sale of those securities. The net proceeds may be invested temporarily in short-term marketable securities or applied to repay short-term debt until they are used for their stated purpose.

RATIO OF EARNINGS TO FIXED CHARGES

The ratio of earnings to fixed charges is calculated using the Securities and Exchange Commission guidelines (a).


	Period
	Ended
	June 30,		Year Ended December 31,
	2007		2006		2005		2004		2003			2002
	(Dollars in millions)

Earnings as defined for fixed charges calculation
Add:
Pretax (loss) income from continuing operations(b)	$	809	$	1,414	$	1,189	$	720	$	(990	)	$	1,054
Fixed charges		379		1,382		1,159		1,433		1,620			1,550
Distributed income of equity investees		59		893		473		140		263			369
Deduct:
Preference security dividend requirements of consolidated subsidiaries		—		27		27		31		139			170
Interest capitalized(c)		34		56		23		18		58			193

Total earnings(as defined for the Fixed Charges calculation)	$	1,213	$	3,606	$	2,771	$	2,244	$	696		$	2,610

Fixed charges:
Interest on debt, including capitalized portions	$	358	$	1,311	$	1,096	$	1,365	$	1,441		$	1,340
Estimate of interest within rental expense		21		44		36		37		40			40
Preference security dividend requirements of consolidated subsidiaries		—		27		27		31		139			170

Total fixed charges	$	379	$	1,382	$	1,159	$	1,433	$	1,620		$	1,550

Ratio of earnings to fixed charges		3.2		2.6		2.4		1.6		(d	)		1.7


(a)		Certain prior year Income Statement amounts above have been adjusted for businesses reclassified to discontinued operations during 2007.

(b)		Excludes minority interest expenses and income or loss from equity investees.

(c)		Excludes equity costs related to Allowance for Funds Used During Construction that are included in Other Income and Expenses in the Consolidated Statements of Operations.

(d)		Earnings were inadequate to cover fixed charges by $924 million for the year ended December 31, 2003.

DESCRIPTION OF CAPITAL STOCK

The following summary of our capital stock is subject in all respects to the applicable provisions of the Delaware General Corporation Law (the “DGCL”), and our amended and restated certificate of incorporation. The following discussion is a summary of our amended and restated certificate of incorporation and by-laws and is qualified in its entirety by reference to those documents.

General

Our total number of authorized shares of capital stock consists of 2 billion shares of common stock, par value $0.001 per share, and 44 million shares of preferred stock, par value $0.001 per share.

Common Stock

Except as otherwise required by law and subject to the rights of the holders of any class or series of preferred stock, with respect to all matters upon which shareholders are entitled to vote or to which shareholders are entitled to give consent, the holders of any outstanding shares of common stock vote together as a class, and every holder of common stock is entitled to cast one vote in person or by proxy for each share of common stock standing in such holder’s name on our books. We do not have a classified board of directors nor do we permit cumulative voting.

Holders of common stock are not entitled to any preemptive rights to subscribe for additional shares of common stock nor are they liable to further capital calls or to assessments by us.

Subject to applicable law and the rights, if any, of the holders of any class or series of preferred stock having a preference over the rights to participate with the common stock with respect to the payment of dividends, holders of our common stock are entitled to receive dividends or other distributions as declared by our board of directors at its discretion.

The board of directors may create a class or series of preferred stock with dividends the rate of which is calculated by reference to, and payment of which is concurrent with, dividends on shares of common stock.

Preferred Stock

Our board of directors has the full authority permitted by law, at any time and from time to time, to divide the authorized and unissued shares of preferred stock into one or more classes or series and, with respect to each such class or series, to determine by resolution or resolutions the number of shares constituting such class or series and the designation of such class or series, the voting powers, if any, of the shares of such class or series, and the preferences and relative, participating, optional or other special rights, if any, and any qualifications, limitations or restrictions thereof, of the shares of any such class or series of preferred stock to the full extent now or as may in the future be permitted by the law of the State of Delaware. The powers, preferences and relative, participating, optional and other special rights of each class or series of preferred stock and the qualifications, limitations or restrictions thereof, if any, may differ from those of any and all other classes or series at any time outstanding. Except as otherwise required by law, as provided in the certificate of incorporation or as determined by our board of directors, holders of preferred stock will not have any voting rights and will not be entitled to any notice of shareholder meetings.

Provisions that Have or May Have the Effect of Delaying or Prohibiting a Change in Control

Under our certificate of incorporation, the board of directors has the full authority permitted by Delaware law to determine the voting rights, if any, and designations, preferences, limitations and special rights of any class or any series of any class of the preferred stock.

The certificate of incorporation also provides that a director may be removed from office with or without cause. However, subject to applicable law, any director elected by the holders of any series of preferred stock may be removed without cause only by the holders of a majority of the shares of such series of preferred stock.

Our certificate of incorporation requires an affirmative vote of the holders of at least 80% of the combined voting power of the then outstanding shares of stock of all our classes entitled to vote generally in the election of directors, voting together as a single class, to amend, alter or repeal provisions in the certificate of incorporation which relate to the number of directors and vacancies and newly created directorships.

Our certificate of incorporation provides that any action required to be taken at any annual or special meeting of shareholders may be taken without a meeting and without prior notice only if consent in writing setting forth the action to be taken is signed by all the holders of our issued and outstanding capital stock entitled to vote in respect of such action.

Our by-laws provide that, except as expressly required by the certificate of incorporation or by applicable law, and subject to the rights of the holders of any series of preferred stock, special meetings of the

shareholders or of any series entitled to vote may be called for any purpose or purposes only by the Chairman of the board of directors or by the board of directors. Shareholders are not entitled to call special meetings.

The provisions of our certificate of incorporation and by-laws conferring on our board of directors the full authority to issue preferred stock, the restrictions on removing directors elected by holders of preferred stock, the supermajority voting requirements relating to the amendment, alteration or repeal of the provisions governing the number of directors and filling of vacancies and newly created directorships, the requirement that shareholders act at a meeting unless all shareholders agree in writing, and the inability of shareholders to call a special meeting, in certain instances could have the effect of delaying, deferring or preventing a change in control or the removal of existing management.

DESCRIPTION OF DEBT SECURITIES

Duke Energy will issue the debt securities, whether senior or subordinated, in one or more series under its Indenture, as supplemented from time to time. Unless otherwise specified in the applicable prospectus supplement, the trustee under the Indenture will be The Bank of New York. A form of the Indenture is an exhibit to the registration statement, of which this prospectus is a part.

Duke Energy conducts its business through subsidiaries. Accordingly, its ability to meet its obligations under the debt securities is dependent on the earnings and cash flows of those subsidiaries and the ability of those subsidiaries to pay dividends or to advance or repay funds to Duke Energy. In addition, the rights that Duke Energy and its creditors would have to participate in the assets of any such subsidiary upon the subsidiary’s liquidation or recapitalization will be subject to the prior claims of the subsidiary’s creditors. Certain subsidiaries of Duke Energy have incurred substantial amounts of debt in the operations and expansion of their businesses, and Duke Energy anticipates that certain of its subsidiaries will do so in the future.

Holders of debt securities will generally have a junior position to claims of creditors of our subsidiaries, including trade creditors, debtholders, secured creditors, taxing authorities, guarantee holders and any holders of preferred stock. In addition to trade debt, certain of our operating subsidiaries have ongoing corporate debt programs used to finance their business activities. As of June 30, 2007, on a consolidated basis (including securities due within one year), we had approximately $12.0 billion of outstanding debt, of which approximately $11.3 billion was subsidiary debt. Unless otherwise specified in a prospectus supplement, the Indenture will not limit the amount of indebtedness or preferred stock issuable by our subsidiaries.

The following description of the debt securities is only a summary and is not intended to be comprehensive. For additional information you should refer to the Indenture.

General

The Indenture does not limit the amount of debt securities that Duke Energy may issue under it. Duke Energy may issue debt securities from time to time under the Indenture in one or more series by entering into supplemental indentures or by its board of directors or a duly authorized committee authorizing the issuance.

The debt securities of a series need not be issued at the same time, bear interest at the same rate or mature on the same date.

Provisions Applicable to Particular Series

The prospectus supplement for a particular series of debt securities being offered will disclose the specific terms related to the offering, including the price or prices at which the debt securities to be offered will be issued. Those terms may include some or all of the following:


	•	the title of the series;

	•	the total principal amount of the debt securities of the series;

	•	the date or dates on which principal is payable or the method for determining the date or dates, and any right that Duke Energy has to change the date on which principal is payable;


	•	the interest rate or rates, if any, or the method for determining the rate or rates, and the date or dates from which interest will accrue;

	•	any interest payment dates and the regular record date for the interest payable on each interest payment date, if any;

	•	whether Duke Energy may extend the interest payment periods and, if so, the terms of the extension;

	•	the place or places where payments will be made;

	•	whether Duke Energy has the option to redeem the debt securities and, if so, the terms of its redemption option;

	•	any obligation that Duke Energy has to redeem the debt securities through a sinking fund or to purchase the debt securities through a purchase fund or at the option of the holder;

	•	whether the provisions described under “Defeasance and Covenant Defeasance” will not apply to the debt securities;

	•	the currency in which payments will be made if other than U.S. dollars, and the manner of determining the equivalent of those amounts in U.S. dollars;

	•	if payments may be made, at Duke Energy’s election or at the holder’s election, in a currency other than that in which the debt securities are stated to be payable, then the currency in which those payments may be made, the terms and conditions of the election and the manner of determining those amounts;

	•	the portion of the principal payable upon acceleration of maturity, if other than the entire principal;

	•	whether the debt securities will be issuable as global securities and, if so, the securities depositary;

	•	any changes in the events of default or covenants with respect to the debt securities;

	•	any index or formula used for determining principal, premium or interest;

	•	the terms of the subordination of any series of subordinated debt;

	•	if the principal payable on the maturity date will not be determinable on one or more dates prior to the maturity date, the amount which will be deemed to be such principal amount or the manner of determining it; and

	•	any other terms.

Unless Duke Energy states otherwise in the applicable prospectus supplement, Duke Energy will issue the debt securities only in fully registered form without coupons, and there will be no service charge for any registration of transfer or exchange of the debt securities. Duke Energy may, however, require payment to cover any tax or other governmental charge payable in connection with any transfer or exchange. Subject to the terms of the Indenture and the limitations applicable to global securities, transfers and exchanges of the debt securities may be made at The Bank of New York, 101 Barclay Street, New York, New York 10286 or at any other office maintained by Duke Energy for such purpose.

The debt securities will be issuable in denominations of $1,000 and any integral multiples of $1,000, unless Duke Energy states otherwise in the applicable prospectus supplement.

Duke Energy may offer and sell the debt securities, including original issue discount debt securities, at a substantial discount below their principal amount. The applicable prospectus supplement will describe special United States federal income tax and any other considerations applicable to those securities. In addition, the applicable prospectus supplement may describe certain special United States federal income tax or other considerations, if any, applicable to any debt securities that are denominated in a currency other than U.S. dollars.

Book-Entry Debt Securities

We may issue debt securities of a series in whole or in part in the form of one or more global securities. We will deposit such global securities with, or on behalf of, a depository identified in the applicable prospectus supplement. We may issue global securities in either registered or bearer form and in either temporary or permanent form. Unless we specify otherwise in the applicable prospectus supplement, debt securities that are represented by a global security will be issued in denominations of $1,000 or any integral multiple thereof and will be issued in registered form only, without coupons. We will make payments of principal of, premium, if any, and interest on debt securities represented by a global security to the applicable trustee under the applicable indenture, which will then forward such payments to the depository.

We anticipate that any global securities will be deposited with, or on behalf of, The Depository Trust Company, New York, New York (“DTC”), and that such global securities will be registered in the name of Cede & Co., DTC’s nominee. We further anticipate that the following provisions will apply to the depository arrangements with respect to any such global securities. We will describe any additional or differing terms of the depository arrangements in the applicable prospectus supplement relating to a particular series of debt securities issued in the form of global securities.

So long as DTC or its nominee is the registered owner of a global security, DTC or its nominee, as the case may be, will be considered the sole holder of the debt securities represented by such global security for all purposes under the applicable indenture. Except as described below, owners of beneficial interests in a global security:


	•	will not be entitled to have debt securities represented by such global security registered in their names;

	•	will not receive or be entitled to receive physical delivery of debt securities in certificated form; and

	•	will not be considered the owners or holders thereof under the applicable indenture.

The laws of some states require that certain purchasers of securities take physical delivery of such securities in certificated form; accordingly, such laws may limit the transferability of beneficial interests in a global security.

Unless we specify otherwise in the applicable prospectus supplement, each global security representing book-entry notes will be exchangeable for certificated notes only if:


	•	DTC notifies us that it is unwilling or unable to continue as depository or DTC ceases to be a clearing agency registered under the Exchange Act (if so required by applicable law or regulation) and, in either case, a successor depository is not appointed by us within ninety (90) days after we receive such notice or become aware of such unwillingness, inability or ineligibility;

	•	we, in our sole discretion and subject to DTC’s procedures, determine that the global securities shall be exchangeable for certificated notes; or

	•	there shall have occurred and be continuing an event of default under an indenture with respect to the notes and beneficial owners representing a majority in aggregate principal amount of the book-entry notes represented by global securities advise DTC to cease acting as depository. Upon any such exchange, owners of a beneficial interest in the global security or securities representing book-entry notes will be entitled to physical delivery of individual debt securities in certificated form of like tenor and rank, equal in principal amount to such beneficial interest, and to have such debt securities in certificated form registered in the names of the beneficial owners, which names shall be provided by DTC’s relevant participants (as identified by DTC) to the applicable trustee.

Unless we describe otherwise in the applicable prospectus supplement, debt securities so issued in certificated form will be issued in denominations of $1,000 or any integral multiple thereof, and will be issued in registered form only, without coupons.

DTC will act as securities depository for the debt securities. The debt securities will be issued as fully registered securities registered in the name of Cede & Co. (DTC’s partnership nominee) or such other name as

may be requested by an authorized representative of DTC. Except as otherwise provided, one fully registered debt security certificate will be issued with respect to each series of the debt securities, each in the aggregate principal amount of such series, and will be deposited with DTC. If, however, the aggregate principal amount of any series exceeds $500 million, one certificate will be issued with respect to each $500 million of principal amount and an additional certificate will be issued with respect to any remaining principal amount of such series.

The following is based on information furnished to us by DTC:

DTC, the world’s largest securities depository, is a limited-purpose trust company organized under the New York Banking Law, a “banking organization” within the meaning of the New York Banking Law, a member of the Federal Reserve System, a “clearing corporation” within the meaning of the New York Uniform Commercial Code, and a “clearing agency” registered pursuant to the provisions of Section 17A of the Exchange Act. DTC holds and provides asset servicing for over 2.2 million issues of U.S. andnon-U.S. equity issues, corporate and municipal debt issues, and money market instruments from over 100 countries that DTC’s participants (“Direct Participants”) deposit with DTC. DTC also facilitates the post-trade settlement among Direct Participants of sales and other securities transactions in deposited securities through electronic computerized book-entry transfers and pledges between Direct Participants’ accounts. This eliminates the need for physical movement of securities certificates. Direct Participants include both U.S. andnon-U.S. securities brokers and dealers, banks, trust companies, clearing corporations, and certain other organizations. DTC is a wholly-owned subsidiary of The Depository Trust & Clearing Corporation (“DTCC”). Access to the DTC system is also available to others such as both U.S. andnon-U.S. securities brokers and dealers, banks, trust companies, and clearing corporations that clear through or maintain a custodial relationship with a Direct Participant, either directly or indirectly (“Indirect Participants”). DTC has Standard & Poor’s highest rating: AAA. The DTC rules applicable to its Participants are on file with the SEC. More information about DTC can be found atwww.dtcc.comandwww.dtc.org.

Purchases of debt securities under the DTC system must be made by or through Direct Participants, which will receive a credit for the debt securities on DTC’s records. The ownership interest of each actual purchaser of each debt security (“Beneficial Owner”) is in turn to be recorded on the Direct and Indirect Participants’ records. Beneficial Owners will not receive written confirmation from DTC of their purchase, but Beneficial Owners are, however, expected to receive a written confirmation providing details of the transaction, as well as periodic statements of their holdings, from the Direct or Indirect Participant through which the Beneficial Owner entered into the transaction. Transfers of ownership interests in debt securities are to be accomplished by entries made on the books of Direct and Indirect Participants acting on behalf of Beneficial Owners. Beneficial Owners will not receive certificates representing their ownership interests in debt securities, except in the event that use of the book-entry system for the debt securities is discontinued.

To facilitate subsequent transfers, all debt securities deposited by Direct Participants with DTC are registered in the name of DTC’s partnership nominee, Cede & Co, or such other name as may be requested by an authorized representative of DTC. The deposit of the debt securities with DTC and their registration in the name of Cede & Co. or such other DTC nominee do not effect any change in beneficial ownership. DTC has no knowledge of the actual Beneficial Owners of the debt securities; DTC’s records reflect only the identities of the Direct Participants to whose accounts debt securities are credited, which may or may not be the Beneficial Owners. The Direct and Indirect Participants will remain responsible for keeping account of their holdings on behalf of their customers.

Conveyance of notices and other communications by DTC to Direct Participants, by Direct Participants to Indirect Participants, and by Direct Participants and Indirect Participants to Beneficial Owners will be governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect from time to time.

Neither DTC nor Cede & Co. (nor any other DTC nominee) will consent or vote with respect to the debt securities unless authorized by a Direct Participant in accordance with DTC’s procedures. Under its usual procedures, DTC mails a proxy (an “Omnibus Proxy”) to the issuer as soon as possible after the record date. The Omnibus Proxy assigns Cede & Co.’s consenting or voting rights to those Direct Participants to whose

accounts the debt securities are credited on the record date (identified on a list attached to the Omnibus Proxy).

Principal, premium, if any, interest payments and redemption proceeds on the debt securities will be made to Cede & Co., or such other nominee as may be requested by an authorized representative of DTC. DTC’s practice is to credit Direct Participants’ accounts upon DTC’s receipt of funds and corresponding detail information from us or the trustee, on the payment date in accordance with their respective holdings shown on DTC’s records. Payments by Participants to Beneficial Owners will be governed by standing instructions and customary practices, as is the case with securities held for the accounts of customers in bearer form or registered in “street name” and will be the responsibility of such Participant and not of DTC, nor its nominee, the applicable Trustee or us, subject to any statutory or regulatory requirements as may be in effect from time to time. Payment of principal, premium, if any, interest and redemption proceeds to Cede & Co. (or such other nominee as may be requested by an authorized representative of DTC) is our responsibility or the applicable Trustee’s, disbursement of such payments to Direct Participants will be the responsibility of DTC, and disbursement of such payments to the Beneficial Owners will be the responsibility of Direct and Indirect Participants.

If applicable, redemption notices shall be sent to DTC. If less than all of the book-entry notes within an issue are being redeemed, DTC’s practice is to determine by lot the amount of the interest of each Direct Participant in such issue to be redeemed.

A Beneficial Owner shall give notice of any option to elect to have its book-entry notes repaid by us, through its Participant, to the applicable Trustee, and shall effect delivery of such book-entry notes by causing the Direct Participant to transfer the Participant’s interest in the global security or securities representing such book-entry notes, on DTC’s records, to such Trustee. The requirement for physical delivery of book-entry notes in connection with a demand for repayment will be deemed satisfied when the ownership rights in the global security or securities representing such book-entry notes are transferred by Direct Participants on DTC’s records and followed by a book-entry credit of tendered securities to the Trustee’s DTC account.

DTC may discontinue providing its services as securities depository with respect to the debt securities at any time by giving reasonable notice to the applicable Trustee or us. Under such circumstances, in the event that a successor securities depository is not appointed, debt security certificates are required to be printed and delivered.

We may decide to discontinue use of the system of book-entry transfers through DTC (or a successor securities depository). In that event, debt security certificates will be printed and delivered to DTC.

The information in this section concerning DTC and DTC’s book-entry system has been obtained from sources that we believe to be reliable, but we take no responsibility for the accuracy thereof.

Unless stated otherwise in the prospectus supplement, the underwriters or agents with respect to a series of debt securities issued as global securities will be Direct Participants in DTC.

Neither we, the applicable Trustee nor any applicable paying agent will have any responsibility or liability for any aspect of the records relating to or payments made on account of beneficial interests in a global security, or for maintaining, supervising or reviewing any records relating to such beneficial interest.

Redemption

Provisions relating to the redemption of debt securities will be set forth in the applicable prospectus supplement. Unless Duke Energy states otherwise in the applicable prospectus supplement, Duke Energy may redeem debt securities only upon notice mailed at least thirty (30), but not more than sixty (60) days before the date fixed for redemption. Unless Duke Energy states otherwise in the applicable prospectus supplement, that notice may state that the redemption will be conditional upon the Indenture Trustee, or the applicable paying agent, receiving sufficient funds to pay the principal, premium and interest on those debt securities on the date fixed for redemption and that if the Indenture Trustee or the applicable paying agent does not receive

those funds, the redemption notice will not apply, and Duke Energy will not be required to redeem those debt securities.

Duke Energy will not be required to:


	•	issue, register the transfer of, or exchange any debt securities of a series during the period beginning fifteen (15) days before the date the notice is mailed identifying the debt securities of that series that have been selected for redemption; or

	•	register the transfer of or exchange any debt security of that series selected for redemption except the unredeemed portion of a debt security being partially redeemed.

Consolidation, Merger, Conveyance or Transfer

The Indenture provides that Duke Energy may consolidate or merge with or into, or convey or transfer all or substantially all of its properties and assets to, another corporation or other entity. Any successor must, however, assume Duke Energy’s obligations under the Indenture and the debt securities issued under it, and Duke Energy must deliver to the Indenture Trustee a statement by certain of its officers and an opinion of counsel that affirm compliance with all conditions in the Indenture relating to the transaction. When those conditions are satisfied, the successor will succeed to and be substituted for Duke Energy under the Indenture, and Duke Energy will be relieved of its obligations under the Indenture and the debt securities.

Modification; Waiver

Duke Energy may modify the Indenture with the consent of the holders of a majority in principal amount of the outstanding debt securities of all series of debt securities that are affected by the modification, voting as one class. The consent of the holder of each outstanding debt security affected is, however, required to:


	•	change the maturity date of the principal or any installment of principal or interest on that debt security;

	•	reduce the principal amount, the interest rate or any premium payable upon redemption on that debt security;

	•	reduce the amount of principal due and payable upon acceleration of maturity;

	•	change the currency of payment of principal, premium or interest on that debt security;

	•	impair the right to institute suit to enforce any such payment on or after the maturity date or redemption date;

	•	reduce the percentage in principal amount of debt securities of any series required to modify the Indenture, waive compliance with certain restrictive provisions of the Indenture or waive certain defaults; or

	•	with certain exceptions, modify the provisions of the Indenture governing modifications of the Indenture or governing waiver of covenants or past defaults.

In addition, Duke Energy may modify the Indenture for certain other purposes, without the consent of any holders of debt securities.

The holders of a majority in principal amount of the outstanding debt securities of any series may waive, for that series, Duke Energy’s compliance with certain restrictive provisions of the Indenture. The holders of a majority in principal amount of the outstanding debt securities of all series under the Indenture with respect to which a default has occurred and is continuing, voting as one class, may waive that default for all those series, except a default in the payment of principal or any premium or interest on any debt security or a default with respect to a covenant or provision which cannot be modified without the consent of the holder of each outstanding debt security of the series affected.

Events of Default

The following are events of default under the Indenture with respect to any series of debt securities, unless Duke Energy states otherwise in the applicable prospectus supplement:


	•	failure to pay principal of or any premium on any Debt security of that series when due;

	•	failure to pay when due any interest on any Debt security of that series that continues for sixty (60) days; for this purpose, the date on which interest is due is the date on which Duke Energy is required to make payment following any deferral of interest payments by it under the terms of debt securities that permit such deferrals;

	•	failure to make any sinking fund payment when required for any Debt security of that series that continues for sixty (60) days;

	•	failure to perform any covenant in the Indenture (other than a covenant expressly included solely for the benefit of other series) that continues for ninety (90) days after the Indenture Trustee or the holders of at least 33% of the outstanding debt securities of that series give Duke Energy written notice of the default; and

	•	certain bankruptcy, insolvency or reorganization events with respect to Duke Energy.

In the case of the fourth event of default listed above, the Indenture Trustee may extend the grace period.

In addition, if holders of a particular series have given a notice of default, then holders of at least the same percentage of debt securities of that series, together with the Indenture Trustee, may also extend the grace period. The grace period will be automatically extended if Duke Energy has initiated and is diligently pursuing corrective action.

Duke Energy may establish additional events of default for a particular series and, if established, any such events of default will be described in the applicable prospectus supplement.

If an event of default with respect to debt securities of a series occurs and is continuing, then the Indenture Trustee or the holders of at least 33% in principal amount of the outstanding debt securities of that series may declare the principal amount of all debt securities of that series to be immediately due and payable. However, that event of default will be considered waived at any time after the declaration, but before a judgment for payment of the money due has been obtained if:


	•	Duke Energy has paid or deposited with the Indenture Trustee all overdue interest, the principal and any premium due otherwise than by the declaration and any interest on such amounts, and any interest on overdue interest, to the extent legally permitted, in each case with respect to that series, and all amounts due to the Indenture Trustee; and

	•	all events of default with respect to that series, other than the nonpayment of the principal that became due solely by virtue of the declaration, have been cured or waived.

The Indenture Trustee is under no obligation to exercise any of its rights or powers at the request or direction of any holders of debt securities unless those holders have offered the Indenture Trustee security or indemnity against the costs, expenses and liabilities which it might incur as a result. The holders of a majority in principal amount of the outstanding debt securities of any series have, with certain exceptions, the right to direct the time, method and place of conducting any proceedings for any remedy available to the Indenture Trustee or the exercise of any power of the Indenture Trustee with respect to those debt securities. The Indenture Trustee may withhold notice of any default, except a default in the payment of principal or interest, from the holders of any series if the Indenture Trustee in good faith considers it in the interest of the holders to do so.

The holder of any Debt security will have an absolute and unconditional right to receive payment of the principal, any premium and, within certain limitations, any interest on that Debt security on its maturity date or redemption date and to enforce those payments.

Duke Energy is required to furnish each year to the Indenture Trustee a statement by certain of its officers to the effect that it is not in default under the Indenture or, if there has been a default, specifying the default and its status.

Payments; Paying Agent

The paying agent will pay the principal of any debt securities only if those debt securities are surrendered to it. The paying agent will pay interest on debt securities issued as global securities by wire transfer to the holder of those global securities. Unless Duke Energy states otherwise in the applicable prospectus supplement, the paying agent will pay interest on debt securities that are not in global form at its office or, at Duke Energy’s option:


	•	by wire transfer to an account at a banking institution in the United States that is designated in writing to the Indenture Trustee at least sixteen (16) days prior to the date of payment by the person entitled to that interest; or

	•	By check mailed to the address of the person entitled to that interest as that address appears in the security register for those debt securities.

Unless Duke Energy states otherwise in the applicable prospectus supplement, the Indenture Trustee will act as paying agent for that series of debt securities, and the principal corporate trust office of the Indenture Trustee will be the office through which the paying agent acts. Duke Energy may, however, change or add paying agents or approve a change in the office through which a paying agent acts.

Any money that Duke Energy has paid to a paying agent for principal or interest on any debt securities which remains unclaimed at the end of two years after that principal or interest has become due will be repaid to Duke Energy at its request. After repayment to Duke Energy, holders should look only to Duke Energy for those payments.

Defeasance and Covenant Defeasance

The Indenture provides that Duke Energy may be:


	•	discharged from its obligations, with certain limited exceptions, with respect to any series of debt securities, as described in the Indenture, such a discharge being called a “defeasance” in this prospectus; and

	•	released from its obligations under certain restrictive covenants especially established with respect to any series of debt securities, as described in the Indenture, such a release being called a “covenant defeasance” in this prospectus.

Duke Energy must satisfy certain conditions to effect a defeasance or covenant defeasance. Those conditions include the irrevocable deposit with the Indenture Trustee, in trust, of money or government obligations which through their scheduled payments of principal and interest would provide sufficient money to pay the principal and any premium and interest on those debt securities on the maturity dates of those payments or upon redemption.

Following a defeasance, payment of the debt securities defeased may not be accelerated because of an event of default under the Indenture. Following a covenant defeasance, the payment of debt securities may not be accelerated by reference to the covenants from which Duke Energy has been released. A defeasance may occur after a covenant defeasance.

Under current United States federal income tax laws, a defeasance would be treated as an exchange of the relevant debt securities in which holders of those debt securities might recognize gain or loss. In addition, the amount, timing and character of amounts that holders would thereafter be required to include in income might be different from that which would be includible in the absence of that defeasance. Duke Energy urges investors to consult their own tax advisors as to the specific consequences of a defeasance, including the applicability and effect of tax laws other than United States federal income tax laws.

Under current United States federal income tax law, unless accompanied by other changes in the terms of the debt securities, a covenant defeasance should not be treated as a taxable exchange.

Concerning the Indenture Trustee

The Bank of New York is the Indenture Trustee. Duke Energy and certain of its affiliates maintain deposit accounts and banking relationships with The Bank of New York. The Bank of New York also serves as trustee or agent under other indentures and agreements pursuant to which securities of Duke Energy and of certain of its affiliates are outstanding.

The Indenture Trustee will perform only those duties that are specifically set forth in the Indenture unless an event of default under the Indenture occurs and is continuing. In case an event of default occurs and is continuing, the Indenture Trustee will exercise the same degree of care as a prudent individual would exercise in the conduct of his or her own affairs.

PLAN OF DISTRIBUTION

We may sell securities to one or more underwriters or dealers for public offering and sale by them, or we may sell the securities to investors directly or through agents. The prospectus supplement relating to the securities being offered will set forth the terms of the offering and the method of distribution and will identify any firms acting as underwriters, dealers or agents in connection with the offering, including:


	•	the name or names of any underwriters;

	•	the purchase price of the securities and the proceeds to us from the sale;

	•	any underwriting discounts and other items constituting underwriters’ compensation;

	•	any public offering price;

	•	any discounts or concessions allowed or reallowed or paid to dealers; and

	•	any securities exchange or market on which the securities may be listed.

Only those underwriters identified in the prospectus supplement are deemed to be underwriters in connection with the securities offered in the prospectus supplement.

We may distribute the securities from time to time in one or more transactions at a fixed price or prices, which may be changed, or at prices determined as the prospectus supplement specifies. We may sell securities through forward contracts or similar arrangements. In connection with the sale of securities, underwriters, dealers or agents may be deemed to have received compensation from us in the form of underwriting discounts or commissions and also may receive commissions from securities purchasers for whom they may act as agent. Underwriters may sell the securities to or through dealers, and such dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters or commissions from the purchasers for whom they may act as agent.

We may sell the securities directly or through agents we designate from time to time. Any agent involved in the offer or sale of the securities covered by this prospectus will be named in a prospectus supplement relating to such securities. Commissions payable by us to agents will be set forth in a prospectus supplement relating to the securities being offered. Unless otherwise indicated in a prospectus supplement, any such agents will be acting on a best-efforts basis for the period of their appointment.

Some of the underwriters, dealers or agents and some of their affiliates who participate in the securities distribution may engage in other transactions with, and perform other services for, us and our subsidiaries or affiliates in the ordinary course of business.

Any underwriting or other compensation which we pay to underwriters or agents in connection with the securities offering, and any discounts, concessions or commissions which underwriters allow to dealers, will be set forth in the applicable prospectus supplement. Underwriters, dealers and agents participating in the

securities distribution may be deemed to be underwriters, and any discounts and commissions they receive and any profit they realize on the resale of the securities may be deemed to be underwriting discounts and commissions under the Securities Act of 1933. Underwriters, and their controlling persons, and agents may be entitled, under agreements we enter into with them, to indemnification against certain civil liabilities, including liabilities under the Securities Act of 1933.

EXPERTS

The consolidated financial statements and the related financial statement schedule incorporated in this prospectus by reference from Duke Energy Corporation’s October 1, 2007 Report onForm 8-K, and management’s report on the effectiveness of internal control over financial reporting incorporated in this prospectus by reference from Duke Energy Corporation’s Annual Report onForm 10-K for the year ended December 31, 2006, have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports (which reports (1) express an unqualified opinion on the financial statements and financial statement schedule and include explanatory paragraphs regarding the adoption of a new accounting standard and the January 2, 2007 spin-off of the Company’s natural gas businesses, (2) express an unqualified opinion on management’s assessment regarding the effectiveness of internal control over financial reporting, and (3) express an unqualified opinion on the effectiveness of internal control over financial reporting), which are incorporated herein by reference, and have been so incorporated in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.

The consolidated financial statements and the related financial statement schedule of DCP Midstream, LLC as of and for the years ended December 31, 2006 and 2005, incorporated in this prospectus by reference from Duke Energy Corporation’s Annual Report onForm 10-K/A for the year ended December 31, 2006, have been audited by Deloitte & Touche LLP, independent auditors, as stated in their report, which is incorporated herein by reference, and has been so incorporated in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

The consolidated financial statements of TEPPCO Partners, L.P. as of December 31, 2005 and 2004, and for each of the years in the three-year period ended December 31, 2005 have been incorporated by reference herein in reliance upon the report of KPMG LLP, independent registered public accounting firm, incorporated by reference herein, and upon the authority of said firm as experts in accounting and auditing. The audit report dated February 28, 2006, except for the effects of discontinued operations, as discussed in Note 5, which is as of June 1, 2006, contains a separate paragraph that states that as discussed in Note 20 to the consolidated financial statements, TEPPCO Partners, L.P. has restated its consolidated balance sheet as of December 31, 2004, and the related consolidated statements of income, partners’ capital and comprehensive income, and cash flows for the years ended December 31, 2004 and 2003.

VALIDITY OF THE SECURITIES

Robert T. Lucas III, Esq., who is our Associate General Counsel and Assistant Secretary, and/or counsel named in the applicable prospectus supplement, will issue an opinion about the validity of the securities we are offering in the applicable prospectus supplement. Counsel named in the applicable prospectus supplement will pass upon certain legal matters on behalf of any underwriters.

WHERE YOU CAN FIND MORE INFORMATION

We are subject to the informational requirements of the Securities Exchange Act of 1934 and, in accordance therewith, file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, or the SEC. Such reports and other information can be inspected and copied at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. You may also obtain copies of these documents at prescribed rates from the Public Reference Section of the SEC at its Washington, D.C. address. Please call the SEC at1-800-SEC-0330 for further information. Our filings are also available to the public through Duke Energy’s web site athttp://www.duke-energy.comand are made available

as soon as reasonably practicable after such material is filed with or furnished to the SEC. The information on our website is not a part of this prospectus. Our filings are also available to the public through the SEC web site athttp://www.sec.gov.

Additional information about Duke Energy is also available on its web site athttp://www.duke-energy.com. Such web site is not a part of this prospectus.

The SEC allows us to “incorporate by reference” into this prospectus the information we file with them, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be a part of this prospectus, and information that we file later with the SEC will automatically update and supersede this information. This prospectus incorporates by reference the documents incorporated in the prospectus at the time the registration statement became effective and all later documents filed with the SEC, in all cases as updated and superseded by later filings with the SEC. Duke Energy incorporates by reference the documents listed below and any future filings made with the SEC under Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934 until the offering is completed.


	•	Annual Report onForm 10-K for the year ended December 31, 2006;

	•	Amendment No. 1 toForm 10-K for the year ended December 31, 2006, onForm 10-K/A filed March 22, 2007;

	•	Proxy Statement filed on Schedule 14A, April 4, 2007;

	•	Quarterly Reports onForm 10-Q for the quarterly periods ended March 31, 2007, and June 30, 2007; and

	•	Current reports onForm 8-K filed January 31, 2007; February 28, 2007; March 8, 2007; March 12, 2007; May 8, 2007; May 15, 2007; June 1, 2007; June 25, 2007; July 5, 2007; July 18, 2007; and October 1, 2007.

We will provide without charge a copy of these filings, other than any exhibits unless the exhibits are specifically incorporated by reference into this prospectus. You may request a copy by writing us at the following address or telephoning one of the following numbers:

Investor Relations Department

Duke Energy Corporation

P.O. Box 1005

Charlotte, North Carolina 28201

(704) 382-3853 or(800) 488-3853 (toll-free)

You should rely only on the information contained or incorporated by reference in this prospectus. We have not authorized any other person to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. We are not making an offer to sell the securities described in this prospectus in any state where the offer or sale is not permitted. You should assume that the information contained in the prospectus is accurate only as of its date. Our business, financial condition, results of operations and prospects may have changed since that date.

DUKE ENERGY CORPORATION

COMMON STOCK(par value $0.001 per share)

DEBT SECURITIES

PROSPECTUS

Duke Energy (DUK) 424B5Prospectus supplement for primary offering