Exelon has also filed apreliminary proxy statement on Schedule 14A with the SEC in connection with itssolicitation of proxies (the "Preliminary Exelon Meeting Proxy Statement") for ameeting of Exelon shareholders (the "Exelon Meeting") to be called in order toapprove the issuance of shares of Exelon common stock pursuant to the Offer.Exelon expects to file a definitive proxy statement on Schedule 14A with the SECin connection with the solicitation of proxies for the Exelon Meeting (the"Definitive Exelon Meeting Proxy Statement"). Investors and security holders areurged to read the Preliminary NRG Meeting Proxy Statement, the Definitive NRGMeeting Proxy Statement, the Preliminary Exelon Meeting Proxy Statement, and theDefinitive Exelon Meeting Proxy Statement and other relevant materials as theybecome available, because they will contain important information.Investors and security holders can obtain copies of the materials describedabove (and all other related documents filed with the SEC) at no charge on theSEC`s website: Copies can also be obtained at no charge bydirecting a request for such materials to Innisfree M&A Incorporated, 501Madison Avenue, 20th Floor, New York, New York 10022, toll free at1-877-750-9501. Investors and security holders may also read and copy anyreports, statements and other information filed by Exelon, Xchange or NRG withthe SEC, at the SEC public reference room at 100 F Street, N.E., Washington,D.C 20549. Please call the SEC at 1-800-SEC-0330 or visit the SEC`s website forfurther information on its public reference room.

Exelon, Xchange and the individuals to be nominated by Exelon for election toNRG`s Board of Directors will be participants in the solicitation of proxiesfrom NRG stockholders for the NRG Meeting or any adjournment or postponementthereof. Exelon and Xchange will be participants in the solicitation of proxiesfrom Exelon shareholders for the Exelon Meeting or any adjournment orpostponement thereof. In addition, certain directors and executive officers ofExelon and Xchange may solicit proxies for the Exelon Meeting and the NRGMeeting. Information about Exelon and Exelon`s directors and executive officersis available in Exelon`s proxy statement, dated March 19, 2009, filed with theSEC in connection with Exelon`s 2009 annual meeting of shareholders. Informationabout Xchange and Xchange`s directors and executive officers is available inSchedule II to the Prospectus/Offer to Exchange. Information about any otherparticipants will be included in the Definitive NRG Meeting Proxy Statement orthe Definitive Exelon Meeting Proxy Statement, as applicable. Forward Looking StatementsThis release includes forward-looking statements.

There are a number of risksand uncertainties that could cause actual results to differ materially from theforward-looking statements made herein. The factors that could cause actualresults to differ materially from these forward-looking statements includeExelon`s ability to achieve the synergies contemplated by the proposedtransaction, Exelon`s ability to promptly and effectively integrate thebusinesses of NRG and Exelon, and the timing to consummate the proposedtransaction and obtain required regulatory approvals as well as those discussedin (1) the Exchange Offer Documents; (2) Exelon`s 2008 Annual Report on Form10-K in (a) ITEM 1A Risk Factors, (b) ITEM 7. Management`s Discussion andAnalysis of Financial Condition and Results of Operations and (c) ITEM 8.Financial Statements and Supplementary Data: Note 18; (3) Exelon`s First Quarter2009 Quarterly Report on Form 10-Q (to be filed on April 23, 2009) in (a) PartII, Other Information, ITEM 1A Risk Factors and (b) Part I, FinancialInformation, ITEM 1. Financial Statements: Note 13; and (4) other factorsdiscussed in filings with the Securities and Exchange Commission by ExelonCorporation, Exelon Generation Company, LLC, Commonwealth Edison Company, andPECO Energy Company (Companies). Readers are cautioned not to place unduereliance on these forward-looking statements, which apply only as of the date ofthis release. The Companies do not undertake any obligation to publicly releaseany revision to their forward-looking statements to reflect events orcircumstances after the date of this release, except as required by law. Statements made in connection with the exchange offer are not subject to thesafe harbor protections provided to forward-looking statements under the PrivateSecurities Litigation Reform Act of 1995.

All information in this release concerning NRG, including its business,operations, and financial results, was obtained from public sources. WhileExelon has no knowledge that any such information is inaccurate or incomplete,Exelon has not had the opportunity to verify any of that information. ### Exelon Corporation is one of the nation`s largest electric utilities withapproximately 5.4 million customers and $19 billion in annual revenues. Thecompany has one of the industry`s largest portfolios of electricity generationcapacity, with a nationwide reach and strong positions in the Midwest andMid-Atlantic. Exelon distributes electricity to approximately 5.4 millioncustomers in Illinois and Pennsylvania and natural gas to approximately 485,000customers in southeastern Pennsylvania. Exelon is headquartered in Chicago andtrades on the NYSE under the ticker EXC. An equal and offsetting amount has been reflected in operating revenues during the period.

(c) Adjustment to exclude the impact of the 2007 Illinois electric rate settlement.(d) Adjustment to exclude the mark-to-market impact of Exelon's economic hedging activities. (e) Adjustment to exclude external costs associated with Exelon`s proposed acquisition of NRG Energy, Inc (NRG). (f) Adjustment to exclude the impairment of certain of Generation`s Texas plants recorded during the first quarter of 2009.(g) Adjustment to exclude the unrealized losses associated with Generation's NDT fund investments and the associated contractual accounting relating to income taxes. For the first quarter of 2008, $44 million has been recast compared to prior year presentation to reflect an offsetting adjustment to operating and maintenance and income taxes related to the contractual elimination of unrealized losses associated with Generation's NDT fund investments. Exelon CorporationKarie AndersonInvestor Relations312-394-4255orKathleen CantillonCorporate Communications312-394-7417 Copyright Business Wire 2009.