UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

March 27, 2015

Date of Report (Date of earliest event reported)

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:

Section 8 – Other Events

Item 8.01. Other Events.

On March 27, 2015, PECO Energy Company (PECO) filed a request with the Pennsylvania Public Utility Commission (PAPUC) seeking approval to increase its electric distribution rates beginning January 1, 2016. PECO has requested an annual increase of $190 million to its annual electric delivery revenues. The requested rate of return on common equity is 10.95 percent. PECO cannot predict how much of the requested increase the PAPUC ultimately will approve.

Attached as Exhibit 99.1 to this Current Report on Form 8-K is PECO’s press release regarding its filing with the PAPUC.

Section 9 – Financial Statements and Exhibits

Item 9.01. Financial Statements and Exhibits.

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This combined Form 8-K is being furnished separately by Exelon Corporation (Exelon) and PECO (Registrants). Information contained herein relating to any individual Registrant has been furnished by such Registrant on its own behalf. No Registrant makes any representation as to information relating to any other Registrant.

This presentation contains certain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, that are subject to risks and uncertainties. The factors that could cause actual results to differ materially from the forward-looking statements made by Exelon Corporation, Commonwealth Edison Company, and PECO Energy Company (Registrants) include those factors discussed herein, as well as the items discussed in (1) Exelon’s 2014 Annual Report on Form 10-K in (a) ITEM 1A. Risk Factors, (b) ITEM 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations and (c) ITEM 8. Financial Statements and Supplementary Data: Note 22 and (2) other factors discussed in filings with the SEC by the Registrants. Readers are cautioned not to place undue reliance on these forward-looking statements, which apply only as of the date of this presentation. None of the Registrants undertakes any obligation to publicly release any revision to its forward-looking statements to reflect events or circumstances after the date of this presentation.

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SIGNATURES

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

March 27, 2015

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EXHIBIT INDEX

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