Duke Energy CORP — Regulatory Filings 2013

May 20, 2013

Filed under Rule 424(b)(3), Registration Statement No. 333-169633

Pricing Supplement No 10 - Dated Friday, May 17, 2013 (Prospectus Dated September 29, 2010 and Prospectus Supplement Dated November 13, 2012)

CUSIP			Gross	Net	Coupon	Coupon	Coupon	Maturity	1st Coupon	1st Coupon	Survivor’s	Product
Number	Principal Amount	Selling Price	Concession	Proceeds	Type	Rate	Frequency	Date	Date	Amount	Option	Ranking
26442KAK2	[ ]	100.000%	2.000%	[ ]	Fixed	3.100%	Quarterly	06/15/2025	09/15/2013	$9.04	Yes	Senior Unsecured Notes
Redemption Information: Non-Callable

| Duke Energy Corporation |
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| Agents: BofA Merrill Lynch, Incapital, LLC, Citigroup, Edward D. Jones & Co., L.P., Morgan Stanley, RBC Capital Markets,
LLC, UBS Investment Bank, Wells Fargo Advisors, LLC If the maturity date or an
interest payment date for any note is not a business day (as such term is defined in the Prospectus Supplement), principal, premium, if any, and interest for that note is paid on the next business day, and no interest will accrue from, and after,
the maturity date or interest payment date. Investors should read this pricing
supplement in conjunction with the Prospectus and Prospectus Supplement. InterNotes® is a registered trademark of Incapital Holdings LLC. All Rights Reserved. |