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

                                  May 20, 2003
                        (Date of earliest event reported)




Commission File     Name of Registrant; State of Incorporation; Address of        IRS Employer
Number              Principal Executive Offices; and Telephone Number             Identification Number
------------------  ----------------------------------------------------------    ------------------------
                                                                               
1-16169             EXELON CORPORATION                                            23-2990190
                    (a Pennsylvania corporation)
                    10 South Dearborn Street - 37th Floor
                    P.O. Box 805379
                    Chicago, Illinois 60680-5379
                    (312) 394-7398
1-1839              COMMONWEALTH EDISON COMPANY                                   36-0938600
                    (an Illinois corporation)
                    10 South Dearborn Street - 37th Floor
                    P.O. Box 805379
                    Chicago, Illinois 60680-5379
                    (312) 394-4321
1-1401              PECO ENERGY COMPANY                                           23-0970240
                    (a Pennsylvania corporation)
                    P.O. Box 8699 2301 Market Street
                    Philadelphia, Pennsylvania 19101-8699
                    (215) 841-4000
333-85496           EXELON GENERATION COMPANY, LLC                                23-3064219
                    (a Pennsylvania limited liability company)
                    300 Exelon Way
                    Kennett Square, Pennsylvania 19348
                    (610) 765-8200





Item 9. Regulation FD Disclosure

On May 20 and 21, 2003, Robert S. Shapard, Executive Vice President and CFO, met
with investors and presented the information in Exhibit 99.1.

This  combined  Form  8-K is  being  filed  separately  by  Exelon  Corporation,
Commonwealth Edison Company,  PECO Energy Company and Exelon Generation Company,
LLC  (Registrants).  Information  contained  herein  relating to any  individual
registrant  has been filed by such  registrant on its own behalf.  No registrant
makes any representation as to information relating to any other registrant.

Except for the historical  information contained herein,  certain of the matters
discussed in this Report are 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 a registrant  include
those discussed  herein, as well as those discussed in (a) the Registrants' 2002
Annual  Report on Form 10-K - ITEM 7.  Management's  Discussion  and Analysis of
Financial  Condition  and  Results of  Operations  --  Business  Outlook and the
Challenges in Managing Our Business for Exelon, ComEd, PECO, and Generation, (b)
the Registrants' 2002 Annual Report on Form 10-K - Item 8. Financial  Statements
and  Supplementary  Data:  Exelon - Note 19, ComEd - Note 16, PECO - Note 18 and
Generation - Note 13 and (c) other factors  discussed in filings with the United
States Securities and Exchange Commission (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 Report. 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 Report.




                                   SIGNATURES




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




                            EXELON CORPORATION
                            COMMONWEALTH EDISON COMPANY
                            PECO ENERGY COMPANY
                            EXELON GENERATION COMPANY, LLC

                            /S/  Robert S. Shapard
                            -------------------------------
                            Robert S. Shapard
                            Executive Vice President and Chief Financial Officer
                            Exelon Corporation


May 20, 2003