Duke Energy CORP — M&A Activity 2012

*UNITED STATES SECURITIES AND EXCHANGE COMMISSION*

*Washington, D.C. 20549*

*FORM 8-K*

*CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934*

Date of Report (Date of earliest event reported): June 25, 2012

*DUKE ENERGY CORPORATION*

(Exact Name of Registrant as Specified in its Charter)

*550 South Tryon Street, Charlotte, North Carolina 28202*

(Address of Principal Executive Offices, including Zip code)

*(704) 594-6200*

(Registrant’s telephone number, including area code)

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

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

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

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

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240. 13e-4(c))

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*Section 8 – OTHER EVENTS*

*Item 8.01. Other Events.*

On June 25, 2012, Duke Energy Corporation and Progress Energy, Inc. made a joint compliance filing with the Federal Energy Regulatory Commission (“FERC”) accepting all conditions set forth in the FERC’s order dated June 8, 2012 conditionally approving the Second Wholesale Market Power Mitigation Plan, the Joint Dispatch Agreement and the Joint Open Access Transmission Tariff of the companies in connection with their proposed merger. The companies continue to work to secure final merger-related approvals from the North Carolina Utilities Commission and the Public Service Commission of South Carolina and target July 1, 2012 for the closing of the merger.

A copy of the merger scorecard is attached hereto as Exhibits 99.1.

*Section 9 – FINANCIAL STATEMENTS AND EXHIBITS*

*Item 9.01. Financial Statements and Exhibits.*

(d) Exhibits.

99.1 Merger Scorecard

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*SIGNATURE*

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

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*EXHIBIT INDEX*

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