Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On January 29, 2013, Mr. Don Thompson, a director of Exelon Corporation (Exelon), informed the board of directors that he will not stand for re-election as a director of Exelon at the 2013 annual meeting of shareholders.

On January 29, 2013, the board of directors of Exelon increased the size of the board of directors to 17 and elected Mr. Anthony K. Anderson to fill the vacancy, to serve until the 2013 annual meeting of shareholders. The Exelon board has not determined on which committees Mr. Anderson will serve. Mr. Anderson will receive Exelon's standard compensation for its directors as disclosed in its proxy statement.

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This report 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 include those factors discussed herein, as well as the items discussed in (1) Exelon's 2011 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 18;
(2) Constellation's 2011 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 12; (3) Exelon's Third Quarter 2012 Quarterly Report on Form 10-Q in
(a) Part II, Other Information, ITEM 1A. Risk Factors; (b) Part 1, Financial Information, ITEM 2. Management's Discussion and Analysis of Financial Condition and Results of Operations and (c) Part I, Financial Information, ITEM 1. Financial Statements: Note 16; and (4) other factors discussed in filings with the SEC by Exelon. Readers are cautioned not to place undue reliance on these forward-looking statements, which apply only as of the date of this report. Exelon does not undertake any obligation to publicly release any revision to its forward-looking statements to reflect events or circumstances after the date of this report.

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