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


                                  June 25, 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

333-85496                 EXELON GENERATION COMPANY, LLC                                23-3064219
                          (a Pennsylvania limited liability company)
                          300 Exelon Way
                          Kennett Square, Pennsylvania 19348
                          (610) 765-6900









Item 5. Other Events.

On June 26, 2003, Exelon  Corporation  issued a note to its financial  community
announcing that Exelon Generation Company, LLC (Generation) has notified Midwest
Generation,  LLC of the exercise of Generation's  call option under the existing
Coal Generating  Stations  Purchase Power Agreement dated December 15, 1999. The
note is attached to this report as Exhibit 99.

This  combined  Form  8-K is  being  filed  separately  by  Exelon  Corporation,
Commonwealth  Edison 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
                           EXELON GENERATION COMPANY, LLC



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


June 26, 2003