What is the main purpose of this 8-K filing?

The main purpose of this 8-K filing is to report that the Federal Energy Regulatory Commission (FERC) has approved Exelon Corporation's application for its proposed acquisition of NRG Energy, Inc. It also serves to inform investors about related SEC filings concerning the exchange offer and shareholder meetings.

What is the status of the NRG Energy acquisition?

The acquisition has reached a significant milestone with the FERC's approval of Exelon's application. This approval is a necessary step before the acquisition can be finalized. Exelon is proceeding with an exchange offer where NRG shareholders can exchange their shares for Exelon common stock.

Where can I find more detailed information about the acquisition and exchange offer?

Investors are strongly advised to review the various filings made with the SEC, including the Tender Offer Statement on Schedule TO, the Registration Statement on Form S-4, and the proxy statements for both Exelon and NRG shareholder meetings. These documents contain comprehensive details about the transaction and can be accessed on the SEC's website (www.sec.gov).

What is the exchange ratio for the NRG acquisition?

Exelon is offering to exchange each issued and outstanding share of common stock of NRG Energy, Inc. for 0.485 of a share of Exelon common stock.

EXC 8-K SEC Disclosure — May 21, 2009

Summary

This Form 8-K filing by Exelon Corporation announces a significant regulatory milestone in its proposed acquisition of NRG Energy, Inc. On May 21, 2009, the Federal Energy Regulatory Commission (FERC) approved Exelon's application, a key requirement under Section 203 of the Federal Power Act, bringing the company closer to completing the transaction. This approval is a positive development for Exelon and its shareholders, as it removes a major hurdle in the path of this strategic acquisition. The filing also serves as a notification regarding various proxy statements and offer documents being filed with the SEC related to the acquisition. Investors are strongly encouraged to review these filings, including the Schedule TO and Form S-4 registration statement, as they contain crucial details about the exchange offer terms, voting procedures for both Exelon and NRG shareholders, and important information for making informed investment decisions. The company emphasizes the availability of these materials on the SEC website and through designated contact points.

Key Highlights

1FERC approval granted for Exelon's proposed acquisition of NRG Energy, Inc. on May 21, 2009.
2The approval is a requirement under Section 203 of the Federal Power Act.
3This marks a significant step towards the completion of the NRG acquisition.
4Exelon is conducting an exchange offer for NRG shares, offering 0.485 shares of Exelon common stock per NRG share.
5Multiple proxy statements (preliminary and definitive) are being filed for both NRG and Exelon shareholder meetings related to the transaction.
6Investors are urged to read all relevant SEC filings, including the Tender Offer Statement (Schedule TO) and Registration Statement (Form S-4), for important information.
7Information regarding participants in proxy solicitations is also being disclosed.

EXELON CORP 8-K Report, Corporate Update (May 21, 2009)

Summary

Key Highlights

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