Investor Information

Annual Meeting

The 2011 Annual Meeting of Duke Energy Shareholders will be:

Date:Thursday, May 5, 2011

Time:10 a.m.

Place:
O.J. Miller Auditorium
Energy Center
526 South Church Street
Charlotte, NC 28202

Shareholder Services

Shareholders may call 800-488-3853 or 704-382-3853 with questions about their stock accounts, legal transfer requirements, address changes, replacement dividend checks, replacement of lost certificates or other services. Additionally, registered shareholders can view their account online through DUK-Online, available at www.duke-energy.com.

Send written requests to:

Investor Relations
Duke Energy
P.O. Box 1005
Charlotte, NC 28201-1005

For electronic correspondence, visit www.duke-energy.com/investors/contactIR.

Stock Exchange Listing

Duke Energy’s common stock is listed on the New York Stock Exchange. The company’s common stock trading symbol is DUK.

Website Addresses

Corporate home page:
www.duke-energy.com

Investor Relations:
www.duke-energy.com/investors

InvestorDirect Choice Plan

The InvestorDirect Choice Plan provides a simple and convenient way to purchase common stock directly through the company, without incurring brokerage fees. Purchases may be made weekly. Bank drafts for monthly purchases, as well as a safekeeping option for depositing certificates into the plan, are available.

The plan also provides for full reinvestment, direct deposit or cash payment of a portion of the dividends. Additionally, participants may register for DUK-Online, our online account management service.

Financial Publications

Duke Energy’s annual report and related financial publications can be found on our website at www.duke-energy.com/investors. Printed copies are also available free of charge upon request.

Duplicate Mailings

If your shares are registered in different accounts, you may receive duplicate mailings of annual reports, proxy statements and other shareholder information. Call Investor Relations for instructions on eliminating duplications or combining your accounts.

Transfer Agent and Registrar

Duke Energy maintains shareholder records and acts as transfer agent and registrar for the company’s common stock.

Dividend Payment

Duke Energy has paid quarterly cash dividends on its common stock for 84 consecutive years. For the remainder of 2011, dividends on common stock are expected to be paid, subject to declaration by the Board of Directors, on June 16, Sept. 16 and Dec. 16.

Bond Trustee

If you have questions regarding your bond account, call 800-254-2826, or write to:

The Bank of New York Mellon
Global Trust Services
101 Barclay Street — 21st Floor
New York, NY 10286

Send Us Feedback

We welcome your opinion on this annual report. Please visit www.duke-energy.com/investors, where you can view and provide feedback on both the print and online versions of this report. Or contact Investor Relations directly. Duke Energy is an equal opportunity employer. This report is published solely to inform shareholders and is not to be considered an offer, or the solicitation of an offer, to buy or sell securities.