Item 8.01. Other Events.

On July 21, 2009, Exelon Corporation announced that, effective immediately, it has terminated its exchange offer to acquire all of the issued and outstanding shares of common stock of NRG Energy, Inc. and instructed The Bank of New York Mellon, the exchange agent for the exchange offer, to promptly return all tendered shares. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No. Description
99.1 Press release issued by Exelon dated July 21, 2009

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