UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549
                                   FORM 8-K/A

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

                                 March 13, 2003
                        (Date of earliest event reported)

Commission File    Name of Registrant; State of Incorporation;
Number             Address of Principal Executive Offices;          IRS Employer
                   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

Earlier today,  Exelon filed a Current Report on Form 8-K regarding remarks made
by Mr. Rowe at an investor conference.  This amendment to the 8-K is being filed
to clarify the  disclosure of Mr. Rowe's  remarks  regarding  British Energy and
AmerGen.  Mr. Rowe's  reference to  discussions  with British  Energy related to
preliminary  discussions  held some time ago.  There are no current  discussions
between  British  Energy  and Exelon  relating  to a sale of their  interest  in
AmerGen to Exelon.

                                    * * * * *

On March 13, 2003, John W. Rowe, Chairman, President and CEO, met with investors
at an investor conference and addressed their questions.

Exelon has  previously  disclosed that the delay in the effective date of Apollo
Energy, LLC's put right allows Exelon to explore a further  restructuring of its
investment in Sithe Energies,  Inc. Exelon is continuing discussions with Apollo
and Marubeni regarding  restructuring  alternatives that are designed in part to
resolve Exelon's ownership limitations of Sithe's qualifying facilities.  Exelon
would hope to implement any additional  restructuring of its Sithe investment in
2003. If Exelon is unsuccessful in restructuring the Sithe  transaction,  Exelon
will proceed to  implement  measures to address the  ownership of the  qualified
facilities  as well as divest  non-strategic  assets,  for  which the  financial
outcome is uncertain.

At the March 13 conference,  Mr. Rowe provided the additional  information  that
Exelon is actively  trying to sell its investment in Sithe. He noted that in the
event of a sale,  Exelon would likely  recognize a one-time  loss,  would likely
receive  several  hundred  million  dollars in cash,  and would avoid  having to
consolidate Sithe's financial results,  including an incremental $1.3 billion in
debt associated with Sithe.

Mr. Rowe indicated that Exelon's earnings for the first quarter of 2003 would be
higher than  expected by analysts,  but would remain within the range of 20%-25%
of Exelon's  annual earnings for 2003, and that Exelon is affirming its guidance
of  $4.80-$5.00  operating  earnings per share for 2003,  which  assumes  normal
weather and does not include the effect of one-time items.

With respect to Power Team's  transactions during January and February 2003, Mr.
Rowe  commented  that Power Team was fully sold  forward in the PJM market,  and
that its actual demand exceeded its forecast demand. Accordingly, Power Team had
to purchase power to make up a small weather-related shortfall.

With respect to AmerGen,  Mr. Rowe observed that British  Energy and Exelon have
discussed the possibility of a sale of British  Energy's  interest in AmerGen to
Exelon, but that British Energy and Exelon have been unable to agree on a price.
He said that  British  Energy had  indicated  interest in selling for a price in
excess of $300  million,  while  Exelon had  indicated  interest  in  purchasing
British Energy's interest for a price in the range of $200 million.





                                    * * * * *

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.

This report contains certain  forward-looking  statements  within the meaning of
the Private Securities Litigation Reform Act of 1995. These statements are based
on management's  current expectations and are subject to uncertainty and changes
in  circumstances.  Actual  results may vary  materially  from the  expectations
contained herein. The forward-looking statements herein include statements about
future  financial  and  operating   results  of  Exelon.   Economic,   business,
competitive and/or regulatory factors affecting  Exelon's  businesses  generally
could cause actual results to differ materially from those described herein. For
a  discussion  of  the  factors  that  could  cause  actual  results  to  differ
materially,  please  see  Exelon's  filings  with the  Securities  and  Exchange
Commission, particularly those factors discussed in "Management's Discussion and
Analysis of Financial Condition and Results of Operations - Business Outlook and
the Challenges in Managing Our Business" in Exelon's 2002 Annual Report included
in  current  report  on Form 8-K  filed on  2/21/03,  those  discussed  in "Risk
Factors" and  "Management's  Discussion and Analysis of Financial  Condition and
Results of Operations" in Exelon Generation Company's  Registration Statement on
Form S-4, Reg. No.  333-85496,  those discussed in "Risk Factors" in PECO Energy
Company's  Registration  Statement on Form S-3,  Reg. No.  333-99361,  and those
discussed  in "Risk  Factors"  in  Commonwealth  Edison  Company's  Registration
Statement on Form S-3,  Reg. No.  333-99363.  Readers are cautioned not to place
undue reliance on these forward-looking  statements,  which speak only as of the
date of this presentation.  Exelon does not undertake any obligation to publicly
release any revisions to these  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


March 14, 2003