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


                                 October 3, 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

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 October 3,  2003,  Exelon  Corporation  (Exelon)  announced  that it will buy
British  Energy's  fifty  percent  interest in AmerGen  Energy Co. LLC. The news
release is attached as Exhibit 99.

Exelon  estimates  that the  transaction  could provide about $0.10 per share of
incremental  earnings  in 2004.  The $0.10 per share  accretion  is based on the
assumption  of  50/50  equity  and  debt  funding  of the  investment  with  the
transaction  closing  during  the first  quarter.  The  current  2004  operating
earnings  guidance range of $5.15 and $5.45 per share does not include  earnings
accretion  related to this  transaction.  Exelon will  update its 2004  earnings
guidance when it announces its third quarter earnings.

This combined Form 8-K is being filed separately by Exelon and Exelon Generation
Company, LLC (Generation)  (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  factors  discussed  herein,  as well as the  items  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 each of 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
                                            EXELON GENERATION COMPANY, LLC


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


October 3, 2003