UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


In the Matter of                                                 CERTIFICATE
Exelon Corporation                                                   OF
File No. 70-9693                                                 NOTIFICATION

Public Utility Holding Company Act of 1935 (PUHCA)

         Exelon Corporation,  a Pennsylvania  corporation and registered holding
company  (Exelon),  hereby  submits the following  Certificate  of  Notification
pursuant  to Rule  24.  This  filing  is made  pursuant  to  Exelon's  Form  U-1
Application-Declaration, as amended (the "Financing U-1") and the Securities and
Exchange Commission's merger,  financing and investment orders. This certificate
reports  activity  in File No.  70-9693 for the period  January 1, 2003  through
March 31, 2003.  Any  capitalized  terms used herein but not defined herein have
the respective meanings given in the Financing U-1 or the Commission's Orders.

See Exhibit A for Glossary of Defined Terms

1.   Order - A computation in accordance  with rule 53(a) setting forth Exelon's
     "aggregate  investment" in all EWGs and FUCOs, its  "consolidated  retained
     earnings" and a  calculation  of the amount  remaining  under the Requested
     EWG/FUCO Authority.

     Rule  53(a)  provides  that  a  registered   holding  company's   aggregate
     investment  in EWGs and FUCOs may not exceed 50% of its retained  earnings.
     Exelon was granted  partial  relief from this rule pursuant to the December
     8, 2000 Order,  which  provides for a Modified  Rule 53 Test  applicable to
     Exelon's  investments  in EWGs and  FUCOs of $4,000  million.  At March 31,
     2003,  Exelon's  "aggregate  investment"  (as  defined in rule 53(a)  under
     PUHCA)  in all  EWGs  and  FUCOs  was  approximately  $2,157  million,  and
     accordingly,  at March 31, 2003,  Exelon's  remaining  investment  capacity
     under the Modified Rule 53 Test was approximately  $1,843 million. At March
     31, 2003,  Exelon's  "consolidated  retained  earnings" (as defined in rule
     53(a) under PUHCA) was $1,887 million.

2.   Order - A breakdown  showing Exelon's  aggregate  investment in each EWG or
     FUCO counting against the Requested EWG/FUCO Authority.

     Pursuant  to a request  for  confidential  treatment  under rule  104(b) of
     PUHCA,  Exelon is  concurrently  filing in paper  format as  Attachment  1,
     certain  information   concerning  the  aggregate  investment  by  EWG/FUCO
     Project.

3.   Order  -  Identification  of any  new  EWG or  FUCO  counting  against  the
     requested  EWG/FUCO  Authority in which Exelon has invested or committed to
     invest during the quarter.

     In the first  quarter  of 2003,  Exelon did not commit to invest in any new
     EWGs or FUCOs that would count against the Modified Rule 53 Test.







4.   Order -  Analysis  of the growth in  consolidated  retained  earnings  that
     segregates  total earnings growth of EWGs and FUCOs from that  attributable
     to other subsidiaries of Exelon.

     Pursuant  to a request  for  confidential  treatment  under rule  104(b) of
     PUHCA, Exelon is concurrently filing in paper format as Attachment 1, total
     earnings growth by EWG and FUCO project in the first quarter, 2003.

5.   Order - A statement  of  revenues  and net income for each EWG and FUCO for
     the twelve months ending as of that quarter.

     Pursuant  to a request  for  confidential  treatment  under rule  104(b) of
     PUHCA,  Exelon is concurrently  filing in paper format as Attachment 1, net
     income and revenues of Exelon's EWG and FUCO Projects for the twelve months
     ended March 31, 2003.

6.   Order - Consolidated  capitalization  ratios of Exelon,  with  consolidated
     debt to include all short-term  debt and  nonrecourse  debt of all EWGs and
     FUCOs.

     At March 31, 2003,  Exelon's  consolidated  capitalization  ratio was: debt
     65%,  common equity 32%, and preferred  securities of  subsidiaries  of 3%.
     (For  these  purposes,   "consolidated  debt"  means  all  long-term  debt,
     long-term  debt due within one year,  notes  payable  and other  short-term
     obligations,  including  any  short-term  debt  and  non-recourse  debt  of
     EWG/FUCO  Projects,  to the extent normally  consolidated  under applicable
     financial reporting rules).

7.   Order - A table  showing,  as of the end of the  quarter,  the  dollar  and
     percentage  components of the capital structure of Exelon on a consolidated
     basis and of each Utility Subsidiary.

     Capital  Structure of Exelon and its utility  subsidiaries  as of March 31,
     2003 are as follows (in millions, except percentage data):




                           Exelon     PECO      ComEd     Genco    PEPCO      SPCO    SECO     ComEd
                                                                                               Indiana

                                              

    Debt1
    Amount                 $15,949    $5,769    $6,337    $2,993

    Percentage             65%        86%       51%       49%

    Common
    ------
    Equity
    ------

    Amount                 $8,004     $700      $5,679    $3,140   $138       $130    $(10)    $12

    Percentage             32%        10%       46%       51%      100%       100%    100%     100%

    Preferred
    ---------
    Securities
    ----------

    Amount                 $610       $265      $351

    Percentage             3%         4%        3%


------------------
    1 See definition under Item 6.




8.   Order - The market-to-book ratio of Exelon's common stock.

     At March 31, 2003, the  market-to-book  ratio of Exelon's  common stock was
     2.05 to 1.

9.   Order - The sale of any common stock or preferred  securities by Exelon and
     the purchase  price per share and the market price per share at the date of
     the agreement of sale.

     During  the first  quarter  of 2003,  921,935  shares of common  stock were
     issued under various employee stock purchase and compensation  plans with a
     price range of $45.37 to $55.10 per share. The average price for the period
     was $48.59 per share.

10.  Order - The  total  number  of shares  of  Exelon  common  stock  issued or
     issuable under options  granted  during the quarter under employee  benefit
     plans and dividend  reinvestment plans including any employee benefit plans
     or dividend reinvestment plans later adopted.

     Exelon granted  3,130,300  stock options in the first quarter of 2003 at an
     average exercise price of $49.61 per share.

11.  Order - If  Exelon  common  stock  has  been  transferred  to a  seller  of
     securities of a company being acquired, the number of shares so issued, the
     value per share and whether the shares are  restricted  in the hands of the
     acquirer.

     Exelon did not  transfer any common  stock to a seller of  securities  of a
     company being acquired during the first quarter of 2003.

12.  Order - If a guarantee  is issued by Exelon,  Genco or a  Subsidiary  where
     such  guaranty is not exempt under Rule 52 during the quarter,  the name of
     the guarantor, the name of the beneficiary of the guarantee and the amount,
     terms and purpose of the guarantee.




       -----------------------------------------------------------------------------------------------------
             Name of Sub / Purpose                   Amount                             Term
       -----------------------------------------------------------------------------------------------------
                                                                               
       Exelon Generation                           $67,000,000                       12 months
        - Energy trading, equity
       guarantee
       -----------------------------------------------------------------------------------------------------
       Enterprises                                 $59,400,000                       12 months
        - Surety bonds, energy
           contracts, letters of credit
       -----------------------------------------------------------------------------------------------------



13.  Order - The amount and terms of any Exelon  indebtedness  issued during the
     quarter.

     Overnight commercial paper issued through Chase Manhattan Bank on behalf of
     Exelon during the quarter.  Daily balances ranged from $236 million to $750
     million at an average interest rate of 1.41%.





14.  Order - The amount and terms of any  short-term  debt issued by any Utility
     Subsidiary during the quarter.

     A.   Overnight  commercial  paper issued through Bank One on behalf of PECO
          during  the first  quarter.  Daily  balances  ranged  from $50 to $582
          million at an average interest rate of 1.33%.

     B.   Overnight  commercial paper issued through Bank One on behalf of ComEd
          during the first  quarter.  Daily  balances  ranged  from $-0- to $105
          million at an average interest rate of 1.48%.

     C.   Contributions  to and loans from the Utility Money Pool:  The activity
          below  reflects a  contribution  to the money pool by ComEd of Indiana
          and a loan to ComEd.

                            Exelon Utility Money Pool
              For the Period January 1, 2003 through March 31, 2003

Activity  for the  quarter  - ComEd of  Indiana  invested  surplus  funds in the
Utility  Money Pool during the fourth  quarter of 2001 and the first  quarter of
2002 and ComEd  borrowed such funds.  The activity  below  reflects the interest
expense  charged ComEd and the interest income earned by ComEd of Indiana during
the first  quarter of 2003.  Interest  is based on J.P.  Morgan's  money  market
account.



                                                               ComEd                ComEd of Indiana
                    Daily               Applied           Interest Expense           Interest Income
    Date           Balance           Interest Rate            Accrual                    Accrual
------------- -------------------- -------------------- -------------------------- -----------------------

                                                                                         
      1/1/03  $   20,500,000             1.31%                          $745.97                   $745.97
      1/2/03      20,500,000             1.31%                           745.97                    745.97
      1/3/03      20,500,000             1.33%                           757.36                    757.36
      1/4/03      20,500,000             1.33%                           757.36                    757.36
      1/5/03      20,500,000             1.33%                           757.36                    757.36
      1/6/03      20,500,000             1.31%                           745.97                    745.97
      1/7/03      20,500,000             1.30%                           740.28                    740.28
      1/8/03      20,500,000             1.30%                           740.28                    740.28
      1/9/03      20,500,000             1.29%                           734.58                    734.58
     1/10/03      20,500,000             1.29%                           734.58                    734.58
     1/11/03      20,500,000             1.29%                           734.58                    734.58
     1/12/03      20,500,000             1.29%                           734.58                    734.58
     1/13/03      20,500,000             1.30%                           740.28                    740.28
     1/14/03      20,500,000             1.29%                           734.58                    734.58
     1/15/03      20,500,000             1.30%                           740.28                    740.28
     1/16/03      20,500,000             1.31%                           745.97                    745.97
     1/17/03      20,500,000             1.30%                           740.28                    740.28
     1/18/03      20,500,000             1.30%                           740.28                    740.28
     1/19/03      20,500,000             1.30%                           740.28                    740.28
     1/20/03      20,500,000             1.30%                           740.28                    740.28
     1/21/03      20,500,000             1.28%                           728.89                    728.89
     1/22/03      20,500,000             1.29%                           734.58                    734.58
     1/23/03      20,500,000             1.29%                           734.58                    734.58
     1/24/03      20,500,000             1.28%                           728.89                    728.89




     1/25/03      20,500,000            1.288%                           728.89                    728.89
     1/26/03      20,500,000             1288%                           728.89                    728.89
     1/27/03      20,500,000             127%                            723.19                    723.19
     1/28/03      20,500,000             1.29%                           734.58                    734.58
     1/29/03      20,500,000             1.28%                           728.89                    728.89
     1/30/03       20,500,000            1.27%                           723.19                    723.19
     1/31/03      20,500,000             1.27%                           723.19                    723.19
                                   --------------------- ------------------------------ ------------------


Total                                                             $   22,868.89             $   22,868.89
                                                         ============================== ==================

      2/1/03  $   20,500,000             1.27%                          $723.19                   $723.19
      2/2/03      20,500,000             1.27%                           723.19                    723.19
      2/3/03      20,500,000             1.28%                           728.89                    728.89
      2/4/03      20,500,000             1.27%                           723.19                    723.19
      2/5/03      20,500,000             1.27%                           723.19                    723.19
      2/6/03      20,500,000             1.27%                           723.19                    723.19
      2/7/03      20,500,000             1.27%                           723.19                    723.19
      2/8/03      20,500,000             12.7%                           723.19                    723.19
      2/9/03      20,500,000             1.27%                           723.19                    723.19
     2/10/03      20,500,000             1.26%                           717.50                    717.50
     2/11/03      20,500,000             1.27%                           723.19                    723.19
     2/12/03      20,500,000             1.26%                           717.50                    717.50
     2/13/03      20,500,000             1.24%                           706.11                    706.11
     2/14/03      20,500,000             1.25%                           711.81                    711.81
     2/15/03      20,500,000             1.25%                           711.81                    711.81
     2/16/03      20,500,000             1.25%                           711.81                    711.81
     2/17/03      20,500,000             1.25%                           711.81                    711.81
     2/18/03      20,500,000             1.26%                           717.50                    717.50
     2/19/03      20,500,000             1.27%                           723.19                    723.19
     2/20/03      20,500,000             1.24%                           706.11                    706.11
     2/21/03      20,500,000             1.23%                           700.42                    700.42
     2/22/03      20,500,000             1.23%                           700.42                    700.42
     2/23/03      20,500,000             1.23%                           700.42                    700.42
     2/24/03      20,500,000             1.23%                           700.42                    700.42
     2/25/03      20,500,000             1.24%                           706.11                    706.11
     2/26/03      20,500,000             1.24%                           706.11                    706.11
     2/27/03      20,500,000             1.24%                           706.11                    706.11
     2/28/03      20,500,000             1.24%                           706.11                    706.11

Total                                                              $  19,998.89                $19,998.89
                                                         ============================= ==================

      3/1/03  $   20,500,000             1.24%                          $706.11                   $706.11
      3/2/03      20,500,000             1.24%                           706.11                    706.11
      3/3/03      20,500,000             1.24%                           706.11                    706.11
      3/4/03      20,500,000             1.24%                           706.11                    706.11
      3/5/03      20,500,000             1.22%                           694.72                    694.72




      3/6/03      20,500,000             1.22%                           694.72                    694.72
      3/7/03      20,500,000             1.22%                           694.72                    694.72
      3/8/03      20,500,000             1.22%                           694.72                    694.72
      3/9/03      20,500,000             1.22%                           694.72                    694.72
      310/03      20,500,000             1.21%                           689.03                    689.03
     311/023      20,500,000             1.20%                           683.33                    683.33
     3/12/03      20,500,000             1.20%                           683.33                    683.33
     3/13/03      20,500,000             1.19%                           677.64                    677.64
     3/14/03      20,500,000             1.20%                           683.33                    683.33
     3/15/03      20,500,000             1.20%                           683.33                    683.33
     3/16/03      20,500,000             1.20%                           683.33                    683.33
     3/17/03      20,500,000             1.21%                           689.03                    689.03
     3/18/03      20,500,000             1.22%                           694.72                    694.72
     3/19/03      20,500,000             1.20%                           683.33                    683.33
     3/20/03      20,500,000             1.18%                           671.94                    671.94
     3/21/03      20,500,000             1.18%                           671.94                    671.94
     3/22/03      20,500,000             1.18%                           671.94                    671.94
     3/23/03      20,500,000             1.18%                           671.94                    671.94
     3/24/03      20,500,000             1.81%                           671.94                    671.94
     3/25/03      20,500,000             1.20%                           683.33                    683.33
     3/26/03      20,500,000             1.18%                           671.94                    671.94
     3/27/03      20,500,000             1.17%                           666.25                    666.25
     3/28/03      20,500,000             1.18%                           671.94                    671.94
     3/29/03      20,500,000             1.18%                           671.94                    671.94
     3/30/03      20,500,000             1.18%                           671.94                    671.94
     3/31/03      20,500,000             1.18%                           671.94                    671.94
                                   ----------------------- ------------------------------ ----------------

Total                                                             $   21,217.50             $   21,217.50
                                                          =============================== ================


Activity for the quarter - ComEd  invested  surplus  funds in the Utility  Money
Pool  during  the first  quarter  of 2003 and Genco  borrowed  such  funds.
The activity below reflects the interest expense charged Genco and the interest
income earned by ComEd during the first quarter of 2003. Interest is based on
J.P. Morgan's money market account.



                                                             Genco               ComEd
                        Daily             Applied      Interest Expense     Interest Income
      Date             Balance         Interest Rate        Accrual             Accrual
-----------------------------------------------------------------------------------------------

                                                                         
    01/22/03              $ 28,000,000     1.32%                 $   1,027           $   1,027

    01/23/03                55,000,000     1.33%                     2,032               2,032

    01/24/03               269,000,000     1.32%                     9,863               9,863

    01/25/03               269,000,000     1.32%                     9,863               9,863

    01/26/03               269,000,000     1.32%                     9,863               9,863

    01/27/03               272,000,000     1.32%                     9,973               9,973


    01/28/03               276,000,000     1.32%                    10,120              10,120

    01/29/03                84,000,000     1.30%                     3,033               3,033

    01/30/03               116,000,000     1.31%                     4,221               4,221

    01/31/03               143,000,000     1.31%                     5,204               5,204
                                                     ------------------------------------------

                                                                $   65,200          $   65,200
                                                     ==========================================


    02/01/03            $  143,000,000     1.31%                 $   5,204          $    5,204

    02/02/03               143,000,000     1.31%                     5,204               5,204

    02/03/03               171,000,000     1.33%                     6,318               6,318

    02/04/03               185,000,000     1.31%                     6,732               6,732

    02/05/03               194,000,000     1.30%                     7,006               7,006

    02/06/03               202,000,000     1.31%                     7,351               7,351

    02/07/03               209,000,000     1.33%                     7,721               7,721

    02/08/03               209,000,000     1.33%                     7,721               7,721

    02/09/03               209,000,000     1.33%                     7,721               7,721

    02/10/03               213,000,000     1.28%                     7,573               7,573

    02/11/03               230,000,000     1.28%                     8,178               8,178

    02/12/03               243,000,000     1.28%                     8,640               8,640

    02/13/03               283,000,000     1.28%                    10,062              10,062

    02/14/03               154,000,000     1.28%                     5,476               5,476

    02/15/03               154,000,000     1.28%                     5,476               5,476

    02/16/03               154,000,000     1.28%                     5,476               5,476

    02/17/03               154,000,000     1.28%                     5,476               5,476

    02/18/03               195,400,000     1.32%                     7,165               7,165

    02/19/03               201,500,000     1.29%                     7,220               7,220

    02/20/03               237,500,000     1.27%                     8,378               8,378

    02/21/03               242,000,000     1.26%                     8,470               8,470




    02/22/03               242,000,000     1.26%                     8,470               8,470

    02/23/03               242,000,000     1.26%                     8,470               8,470

    02/24/03               281,000,000     1.26%                     9,835               9,835

    02/25/03               210,500,000     1.26%                     7,368               7,368

    02/26/03               257,000,000     1.28%                     9,138               9,138

    02/27/03               300,000,000     1.29%                    10,750              10,750

    02/28/03               335,000,000     1.31%                    12,190              12,190
                                                     ------------------------------------------

                                                                $  214,787         $   214,787
                                                     ==========================================


    03/01/03            $  335,000,000     1.31%                $   12,190          $   12,190

    03/02/03               335,000,000     1.31%                    12,190              12,190

    03/03/03               335,000,000     1.29%                    12,004              12,004

    03/04/03               335,000,000     1.27%                    11,818              11,818

    03/05/03               335,000,000     1.25%                    11,632              11,632

    03/06/03               335,000,000     1.25%                    11,632              11,632

    03/07/03               276,000,000     1.24%                     9,507               9,507

    03/08/03               276,000,000     1.24%                     9,507               9,507

    03/09/03               276,000,000     1.24%                     9,507               9,507

    03/10/03               276,000,000     1.26%                     9,660               9,660

    03/11/03               276,000,000     1.25%                     9,583               9,583

    03/12/03               276,000,000     1.25%                     9,583               9,583

    03/13/03               276,000,000     1.27%                     9,737               9,737

    03/14/03               276,000,000     1.27%                     9,737               9,737

    03/15/03               276,000,000     1.27%                     9,737               9,737

    03/16/03               276,000,000     1.27%                     9,737               9,737

    03/17/03               261,000,000     1.28%                     9,280               9,280

    03/18/03                15,000,000     1.25%                       521                 521




    03/19/03                 5,000,000     1.25%                       174                 174

    03/20/03                 5,000,000     1.25%                       174                 174

    03/21/03                 5,000,000     1.24%                       172                 172

    03/22/03                 5,000,000     1.24%                       172                 172

    03/23/03                 5,000,000     1.24%                       172                 172

    03/24/03                 5,000,000     1.23%                       171                 171

    03/25/03                 5,000,000     1.23%                       171                 171

    03/26/03                 5,000,000     1.24%                       172                 172

    03/27/03                         -                                   -                   -

    03/28/03                         -                                   -                   -

    03/29/03                         -                                   -                   -

    03/30/03                         -                                   -                   -

    03/31/03                         -                                   -                   -
                                                     ------------------------------------------

                                                                $  178,939          $  178,939
                                                     ==========================================



15.  Order  - The  amount  and  terms  of  any  financings  consummated  by  any
     Non-Utility Subsidiary that is not exempt under rule 52.

     None.

16.  Order - All of the  information  that  would have been  provided  on a Form
     U-6B-2 with respect to each security issuance subject thereto that occurred
     during the applicable quarter.

     See Exhibit B.

17.  Order - Future  registration  statements  filed under the Securities Act of
     1933 with respect to securities  described in the Rule 24 certificate  will
     be  filed  or  incorporated  by  reference  as  exhibits  to  the  Rule  24
     Certificate.

     None.







18.  Order  -  Consolidated  balance  sheets  as of the end of the  quarter  and
     separate  balance  sheets as of the end of the  quarter  for each  company,
     including Exelon, that has engaged in jurisdictional financing transactions
     during the quarter.

     See combined form 10Q for Exelon  Corporation,  ComEd, Genco and PECO filed
     on May 2, 2003.

19.  Order - A retained earnings analysis of Exelon on a consolidated  basis and
     of each Utility Subsidiary detailing gross earnings, goodwill amortization,
     dividends  paid  out of each  capital  account  and the  resulting  capital
     account balances at the end of the quarter.

     The consolidated  retained earnings analyses of Exelon, ComEd, PECO, Genco,
     PECO Energy Power Company,  Susquehanna Power Company, Susquehanna Electric
     Company and ComEd of Indiana are attached as Exhibit C.

20.  Order - The notional amount and principal terms of any Hedge Instruments or
     Anticipatory Hedges entered into during the quarter and the identity of the
     other parties to the transaction.

     In the first quarter of 2003,  ComEd and PECO entered into forward starting
     swaps  to  hedge  interest  rate  exposure   associated  with  future  debt
     issuances.  Each of the swaps is designated as a cash flow hedge in that it
     attempts  to  minimize  the  variability  of the  future  interest  expense
     associated with changes in the 3 month LIBOR rate. A table  summarizing the
     forward  starting  swap  transactions  that were  entered into in the first
     quarter  is  below.  Each of the  transactions  was  unwound  prior  to the
     associated  debt issuance.  ComEd issued debt in the amount of $395 million
     on April 7, 2003.  PECO issued debt in the amount of $450  million on April
     28, 2003.




               ---------------------------------------------------------------------------------------------
                     Exelon          Trade      Effective      Notional                      Counter-
               ---------------------------------------------------------------------------------------------
                     Entity           Date        Date          Amount         Term            Party
               ---------------------------------------------------------------------------------------------
                                                          
               ComEd               01/09/03    05/15/03     $80 million     10-year     BNP Paribas
               ---------------------------------------------------------------------------------------------
               ComEd               01/27/03    05/15/03     $80 million     10-year     CSFB
               ---------------------------------------------------------------------------------------------
               PECO                02/12/03    06/02/03     $80 million     5-year      Bank One
               ---------------------------------------------------------------------------------------------
               ComEd               02/18/03    05/15/03     $80 million     10-year     Bank One
               ---------------------------------------------------------------------------------------------
               PECO                02/19/03    06/02/03     $100 million    5-year      BNP Paribas
               ---------------------------------------------------------------------------------------------
               PECO                02/25/03    06/02/03     $90 million     5-year      CSFB
               ---------------------------------------------------------------------------------------------
               PECO                02/25/03    06/02/03     $90 million     5-year      BNP Paribas
               ---------------------------------------------------------------------------------------------




21.  Order - The name,  parent company and amount  invested in any  intermediate
     subsidiary  or financing  subsidiary  during the quarter and the amount and
     terms of any securities issued by those subsidiaries during the quarter.

     None.

22.  Order -  Provide  a copy  of the  consolidated  balance  sheet  and  income
     statement for Ventures, Genco and Enterprises.

     Pursuant  to a request  for  confidential  treatment  under rule 104 (b) of
     PUHCA,  Exelon is  concurrently  filing in paper format as  Attachment 1, a
     consolidated   balance   sheet  and  income   statement  for  Ventures  and
     Enterprises. See combined form 10Q for Genco filed on May 2, 2003.


23.  Order - A  narrative  description  of  Development  Activities  and  amount
     expended on Development Activities during the quarter just ended.


     Pursuant  to a request  for  confidential  treatment  under rule 104 (b) of
     PUHCA,  Exelon is  concurrently  filing in paper format as  Attachment 1, a
     description  of Development  Activities and amount  expended on Development
     Activities during the quarter just ended.














24.  Order - A narrative  description of each investment made during the quarter
     just ended including:


     a.   Name of the company and its immediate parent.

     b.   Method  of  investment   (e.g.,   (1)  purchases  of  capital  shares,
          partnership   interests,   member   interests  in  limited   liability
          companies,  trust  certificates or other forms of voting or non-voting
          equity interests; (2) capital contributions; (3) open account advances
          without interest;  (4) loans; and (5) guarantees  issued,  provided or
          arranged  in respect of the  securities  or other  obligations  of any
          Intermediate Subsidiaries).

     c.   Type of company and/or its business  (e.g.,  EWG,  FUCO,  ETC, Rule 58
          Subsidiary,   Non-U.S.   Energy   Related   Subsidiary,   Intermediate
          Subsidiary, Financing Subsidiary).

     d.   With respect to Non-U.S.  Energy  Related  Subsidiaries,  the business
          engaged in and the locations (countries) where it does business.

     None.

25.  Order - With respect to  reorganizations  during the  quarter,  a narrative
     description of the reorganization  together with specifics as to the assets
     or  securities  transferred,  the method of transfer and the price or other
     consideration for the transfer,  and the names of the companies involved in
     the transfer.

             There were no reorganizations during the quarter.

26.  Order  - A  chart  showing,  as of the end of  such  quarterly  period  and
     reflecting  any  reorganization   accomplished  during  the  quarter,   all
     associated  companies  of  Exelon,  in  addition  to  Ventures,   that  are
     Non-Utility Subsidiaries and identifying each as an EWG, FUCO, ETC, Rule 58
     Subsidiary, Non-U.S. Energy Related Subsidiary,  Intermediate Subsidiary or
     Financing  Subsidiary,  as applicable,  and indicating  Exelon's percentage
     equity ownership in each such entity.

     Pursuant  to a request  for  confidential  treatment  under rule 104 (b) of
     PUHCA,  Exelon is  concurrently  filing in paper format as  Attachment 1, a
     chart providing the requested information.


27.  Additional information.
     None.








                                S I G N A T U R E

         Pursuant to the requirements of PUHCA, the undersigned company has duly
caused this document to be signed on its behalf by the undersigned thereunto
duly authorized.

Date: May 30, 2003

                                                         EXELON CORPORATION

                                                   By: /s/ Matthew F. Hilzinger
                                                       -------------------------
                                       Vice President and Corporate Controller








                                    Exhibit A
                                    ---------

Glossary of Defined Terms
-------------------------

AmerGen                    AmerGen Energy Company, LLC
ComEd                      Commonwealth Edison Company
ComEd of Indiana           Commonwealth Edison Company of Indiana, Inc.
Exelon                     Exelon Corporation
EWGs                       Exempt wholesale generators
FUCO                       Foreign utility company
ExTex                      ExTex LaPorte Limited Partnership
Genco                      Exelon Generation Company, LLC
PECO                       PECO Energy Company
PEPCO                      PECO Energy Power Company
Power Holdings             Exelon Power Holdings, LP
PETT                       PECO Energy Transition Trust
Sithe                      Sithe Energies, Inc.
Sithe ENEH                 Exelon  New England Holdings, LLC
Southeast Chicago          Southeast Chicago Energy Project, LLC
SECO                       Susquehanna Electric Company
SPCO                       Susquehanna Power Company









                               Exhibit B - Item 16
                               -------------------
A.
--
Commonwealth Edison Company has issued the security described herein which issue
was exempted from the  provisions of section 6(a) of the Act and was neither the
subject of a  declaration  or  application  on Form U-1 nor included  within the
exemption provided by Rule U-48.

1.   Type of securities (draft, promissory note): First Mortgage Bonds.

2.   Issue, renewal or guaranty: Issue.

3.   Principal amount of each security:  Issue # 1, $350 million; Issue # 2 $350
     million.

4.   Rate of interest per annum of each  security:  Issue # 1 will bear interest
     at the annual  rate of 3.70%;  Issue # 2 will bear  interest  at the annual
     rate of 5.875%.

5.   Date of issue, renewal or guaranty of each security:  Both issues,  January
     22, 2003.

6.   If renewal of security, give date of original issue: NA.

7.   Date of maturity of each  security (in the case of demand  notes,  indicate
     demand): Issue # 1, 2008; Issue # 2, 2033.

8.   Name of the person to whom each security was issued, renewed or guaranteed:
     Various.

9.   Collateral given with each security: First mortgage.

10.  Consideration given for each security: Cash.

11.  Application of proceeds for each security:  Refinance amounts used to repay
     the following debt securities  either at maturity or upon early redemption:
     (1) $200 million 7.375% First Mortgage  Bonds,  Series 85; (2) $200 million
     Variable Rate Senior Notes;  (3) $100 million 9.17%  Medium-Term  Notes and
     (4) $200 million 8.375%First Mortgage Bonds.

12.  Indicate by a check after the applicable statement below whether the issue,
     renewal or guaranty of each  security  was exempt  from the  provisions  of
     section 6 (a) because of: a. the provisions contained in the first sentence
     of section 6 (b): [ ] b. the provisions  contained in the fourth sentence 6
     (b): [ ] c. the  provisions in any rule of the  Commission  other than Rule
     U-48: [X]

13.  If the security or securities  were exempt from the provisions of section 6
     (a) by virtue of the first  sentence  of  section 6 (b),  give the  figures
     which indicate that the security or securities aggregate (together with all
     other then  outstanding  notes and drafts of a maturity  of nine  months or
     less,  exclusive of days of grace, as to which such company is primarily or
     secondarily  liable) not more than 5 per centum of the principal amount and
     par value of the other securities of such company then outstanding. (Demand
     notes,  regardless  of how long  they may have been  outstanding,  shall be
     considered  as maturing in not more than nine months for the purpose of the
     exemption  from  Section 6 (a) of the Act granted by the first  sentence of
     Section 6 (b): Not Applicable.

14.  If the security or securities  are exempt from the  provisions of section 6
     (a)  because of the fourth  sentence  of section 6 (b),  name the  security
     outstanding on January 1, 1935, pursuant to the terms of which the security
     or securities herein described have been issued: Not Applicable.

15.  If the  securities  are exempt from the provisions of section 6 (a) because
     of any rule of the Commission other than Rule U-48 designate the rule under
     which exemption is



     claimed: Rule 52 (a).


B.
----
ComEd  Financing  III has issued the security  described  herein which issue was
exempted  from the  provisions  of section  6(a) of the Act and was  neither the
subject of a  declaration  or  application  on Form U-1 nor included  within the
exemption provided by Rule U-48.

1.     Type of securities (draft, promissory note): Trust Preferred Securities.

2.     Issue, renewal or guaranty: Issue.

3.     Principal amount of each security: $200 million.

4.     Rate of interest per annum of each security: Annual distribution rate of
       6.35%.

5.     Date of issue, renewal or guaranty of each security: March 17, 2003.

6.     If renewal of security, give date of original issue: NA.

7.     Date of maturity of each security (in the case of demand notes, indicate
       demand): 2033.

8.     Name of the person to whom each security was issued, renewed or
       guaranteed: Various.

9.     Collateral given with each security: ComEd guarantee.

10.    Consideration given for each security: Cash.

11.    Application of proceeds for each security: Acquire trust debentures from
       ComEd.

12.    Indicate by a check after the applicable statement below whether the
       issue, renewal or guaranty of each security was exempt from the
       provisions of section 6 (a) because of: a. the provisions contained in
       the first sentence of section 6 (b): [ ] b. the provisions contained in
       the fourth sentence 6 (b): [ ] c. the provisions in any rule of the
       Commission other than Rule U-48: [X]

13.    If the security or securities were exempt from the provisions of section
       6 (a) by virtue of the first sentence of section 6 (b), give the figures
       which indicate that the security or securities aggregate (together with
       all other then outstanding notes and drafts of a maturity of nine months
       or less, exclusive of days of grace, as to which such company is
       primarily or secondarily liable) not more than 5 per centum of the
       principal amount and par value of the other securities of such company
       then outstanding. (Demand notes, regardless of how long they may have
       been outstanding, shall be considered as maturing in not more than nine
       months for the purpose of the exemption from Section 6 (a) of the Act
       granted by the first sentence of Section 6 (b): Not Applicable.

14.    If the security or securities are exempt from the provisions of section 6
       (a) because of the fourth sentence of section 6 (b), name the security
       outstanding on January 1, 1935, pursuant to the terms of which the
       security or securities herein described have been issued: Not Applicable.

15.    If the securities are exempt from the provisions of section 6 (a) because
       of any rule of the Commission other than Rule U-48 designate the rule
       under which exemption is claimed: Rule 52 (b).





C.
----
ComEd has issued the security described herein which issue was exempted from the
provisions of section 6(a) of the Act and was neither the subject of a
declaration or application on Form U-1 nor included within the exemption
provided by Rule U-48.

1.     Type of securities (draft, promissory note): Trust Debentures.

2.     Issue, renewal or guaranty: Issue.

3.     Principal amount of each security: $200 million.

4.     Rate of interest per annum of each security: Annual distribution rate of
       6.35%.

5.     Date of issue, renewal or guaranty of each security: March 17, 2003.

6.     If renewal of security, give date of original issue: NA.

7.     Date of maturity of each security (in the case of demand notes, indicate
       demand): 2033.

8.     Name of the person to whom each security was issued, renewed or
       guaranteed: ComEd Financing III.

9.     Collateral given with each security: None.

10.    Consideration given for each security: Cash.

11.    Application of proceeds for each security: Redeemed $200 million of 8.48%
       trust preferred securities.

12.    Indicate by a check after the applicable statement below whether the
       issue, renewal or guaranty of each security was exempt from the
       provisions of section 6 (a) because of: a. the provisions contained in
       the first sentence of section 6 (b): [ ] b. the provisions contained in
       the fourth sentence 6 (b): [ ] c. the provisions in any rule of the
       Commission other than Rule U-48: [X]

13.    If the security or securities were exempt from the provisions of section
       6 (a) by virtue of the first sentence of section 6 (b), give the figures
       which indicate that the security or securities aggregate (together with
       all other then outstanding notes and drafts of a maturity of nine months
       or less, exclusive of days of grace, as to which such company is
       primarily or secondarily liable) not more than 5 per centum of the
       principal amount and par value of the other securities of such company
       then outstanding. (Demand notes, regardless of how long they may have
       been outstanding, shall be considered as maturing in not more than nine
       months for the purpose of the exemption from Section 6 (a) of the Act
       granted by the first sentence of Section 6 (b): Not Applicable.

14.    If the security or securities are exempt from the provisions of section 6
       (a) because of the fourth sentence of section 6 (b), name the security
       outstanding on January 1, 1935, pursuant to the terms of which the
       security or securities herein described have been issued: Not Applicable.

15.    If the securities are exempt from the provisions of section 6 (a) because
       of any rule of the Commission other than Rule U-48 designate the rule
       under which exemption is



claimed: Rule 52 (a).

D.
----
AllEnergy Gas and Marketing Company, LLC has issued the security described
herein which issue was exempted from the provisions of section 6(a) of the Act
and was neither the subject of a declaration or application on Form U-1 nor
included within the exemption provided by Rule U-48.

1.     Type of securities (draft, promissory note): Intrasystem financing
       transaction.

2.     Issue, renewal or guaranty: Issue.

3.     Principal amount of each security: $17 million.

4.     Rate of interest per annum of each security: Libor plus 50 basis points.

5.     Date of issue, renewal or guaranty of each security: First quarter,
       2003.

6.     If renewal of security, give date of original issue: NA.

7.     Date of maturity of each security (in the case of demand notes, indicate
       demand): Revolving credit loan.

8.     Name of the person to whom each security was issued, renewed or
       guaranteed: Exelon Energy Company.

9.     Collateral given with each security: None.

10.    Consideration given for each security: Cash.

11.    Application of proceeds for each security: Used for operating funds.

12.    Indicate by a check after the applicable statement below whether the
       issue, renewal or guaranty of each security was exempt from the
       provisions of section 6 (a) because of: a. the provisions contained in
       the first sentence of section 6 (b): [ ] b. the provisions contained in
       the fourth sentence 6 (b): [ ] c. the provisions in any rule of the
       Commission other than Rule U-48: [X]

13.    If the security or securities were exempt from the provisions of section
       6 (a) by virtue of the first sentence of section 6 (b), give the figures
       which indicate that the security or securities aggregate (together with
       all other then outstanding notes and drafts of a maturity of nine months
       or less, exclusive of days of grace, as to which such company is
       primarily or secondarily liable) not more than 5 per centum of the
       principal amount and par value of the other securities of such company
       then outstanding. (Demand notes, regardless of how long they may have
       been outstanding, shall be considered as maturing in not more than nine
       months for the purpose of the exemption from Section 6 (a) of the Act
       granted by the first sentence of Section 6 (b): Not Applicable.

14.    If the security or securities are exempt from the provisions of section
       6 (a) because of the fourth sentence of section 6 (b), name the security
       outstanding on January 1, 1935, pursuant to the terms of which the
       security or securities herein described have been issued: Not
       Applicable.

15.    If the securities are exempt from the provisions of section 6 (a)
       because of any rule of the Commission other than Rule U-48 designate the
       rule under which exemption is claimed: Rule 52 (b).



E.
----
Exelon Enterprises Company, LLC has issued the security described herein which
issue was exempted from the provisions of section 6(a) of the Act and was
neither the subject of a declaration or application on Form U-1 nor included
within the exemption provided by Rule U-48.

1.     Type of securities (draft, promissory note): Intrasystem financing
       transaction.

2.     Issue, renewal or guaranty: Issue.

3.     Principal amount of each security: $15 million.

4.     Rate of interest per annum of each security: Libor plus 50 basis points.

5.     Date of issue, renewal or guaranty of each security: First quarter,
       2003.

6.     If renewal of security, give date of original issue: NA.

7.     Date of maturity of each security (in the case of demand notes, indicate
       demand): Revolving credit loan.

8.     Name of the person to whom each security was issued, renewed or
       guaranteed: Exelon Enterprises Investments, Inc.

9.     Collateral given with each security: None.

10.    Consideration given for each security: Cash.

11.    Application of proceeds for each security: Operating funds.

12.    Indicate by a check after the applicable statement below whether the
       issue, renewal or guaranty of each security was exempt from the
       provisions of section 6 (a) because of: a. the provisions contained in
       the first sentence of section 6 (b): [ ] b. the provisions contained in
       the fourth sentence 6 (b): [ ] c. the provisions in any rule of the
       Commission other than Rule U-48: [X]

13.    If the security or securities were exempt from the provisions of section
       6 (a) by virtue of the first sentence of section 6 (b), give the figures
       which indicate that the security or securities aggregate (together with
       all other then outstanding notes and drafts of a maturity of nine months
       or less, exclusive of days of grace, as to which such company is
       primarily or secondarily liable) not more than 5 per centum of the
       principal amount and par value of the other securities of such company
       then outstanding. (Demand notes, regardless of how long they may have
       been outstanding, shall be considered as maturing in not more than nine
       months for the purpose of the exemption from Section 6 (a) of the Act
       granted by the first sentence of Section 6 (b): Not Applicable.

14.    If the security or securities are exempt from the provisions of section
       6 (a) because of the fourth sentence of section 6 (b), name the security
       outstanding on January 1, 1935, pursuant to the terms of which the
       security or securities herein described have been issued: Not
       Applicable.

15.    If the securities are exempt from the provisions of section 6 (a)
       because of any rule of the Commission other than Rule U-48 designate the
       rule under which exemption is claimed: Rule 52 (b).



F.
----
Exelon Energy, Inc. has issued the security described herein which issue was
exempted from the provisions of section 6(a) of the Act and was neither the
subject of a declaration or application on Form U-1 nor included within the
exemption provided by Rule U-48.

1.     Type of securities (draft, promissory note): Intrasystem financing
       transaction.

2.     Issue, renewal or guaranty: Issue.

3.     Principal amount of each security: $18 million.

4.     Rate of interest per annum of each security: LIBOR plus 50 basis points.

5.     Date of issue, renewal or guaranty of each security: First quarter,
       2003.

6.     If renewal of security, give date of original issue: NA.

7.     Date of maturity of each security (in the case of demand notes, indicate
       demand): Revolving credit loan.

8.     Name of the person to whom each security was issued, renewed or
       guaranteed: Exelon Enterprises Company, LLC.

9.     Collateral given with each security: None.

10.    Consideration given for each security: Cash.

11.    Application of proceeds for each security: Operating funds.

12.    Indicate by a check after the applicable statement below whether the
       issue, renewal or guaranty of each security was exempt from the
       provisions of section 6 (a) because of: a. the provisions contained in
       the first sentence of section 6 (b): [ ] b. the provisions contained in
       the fourth sentence 6 (b): [ ] c. the provisions in any rule of the
       Commission other than Rule U-48: [X]

13.    If the security or securities were exempt from the provisions of section
       6 (a) by virtue of the first sentence of section 6 (b), give the figures
       which indicate that the security or securities aggregate (together with
       all other then outstanding notes and drafts of a maturity of nine months
       or less, exclusive of days of grace, as to which such company is
       primarily or secondarily liable) not more than 5 per centum of the
       principal amount and par value of the other securities of such company
       then outstanding. (Demand notes, regardless of how long they may have
       been outstanding, shall be considered as maturing in not more than nine
       months for the purpose of the exemption from Section 6 (a) of the Act
       granted by the first sentence of Section 6 (b): Not Applicable.

14.    If the security or securities are exempt from the provisions of section
       6 (a) because of the fourth sentence of section 6 (b), name the security
       outstanding on January 1, 1935, pursuant to the terms of which the
       security or securities herein described have been issued: Not
       Applicable.

15.    If the securities are exempt from the provisions of section 6 (a)
       because of any rule of the Commission other than Rule U-48 designate the
       rule under which exemption is claimed: Rule 52 (b).



G.
----
Exelon Services, Inc. has issued the security described herein which issue was
exempted from the provisions of section 6(a) of the Act and was neither the
subject of a declaration or application on Form U-1 nor included within the
exemption provided by Rule U-48.

1.      Type of securities (draft, promissory note): Intrasystem financing
        transaction.

2.      Issue, renewal or guaranty: Issue.

3.      Principal amount of each security: $6.324 million.

4.      Rate of interest per annum of each security: Libor plus 50 basis points.

5.      Date of issue, renewal or guaranty of each security: First quarter,
        2003.

6.      If renewal of security, give date of original issue: NA.

7.      Date of maturity of each security (in the case of demand notes, indicate
        demand): Revolving credit loan.

8.      Name of the person to whom each security was issued, renewed or
        guaranteed: Exelon Enterprises Company, LLC.

9.      Collateral given with each security: None.

10.     Consideration given for each security: Cash.

11.     Application of proceeds for each security: Operating funds.

12.     Indicate by a check after the applicable statement below whether the
        issue, renewal or guaranty of each security was exempt from the
        provisions of section 6 (a) because of: a. the provisions contained in
        the first sentence of section 6 (b): [ ] b. the provisions contained in
        the fourth sentence 6 (b): [ ] c. the provisions in any rule of the
        Commission other than Rule U-48: [X]

13.     If the security or securities were exempt from the provisions of section
        6 (a) by virtue of the first sentence of section 6 (b), give the figures
        which indicate that the security or securities aggregate (together with
        all other then outstanding notes and drafts of a maturity of nine months
        or less, exclusive of days of grace, as to which such company is
        primarily or secondarily liable) not more than 5 per centum of the
        principal amount and par value of the other securities of such company
        then outstanding. (Demand notes, regardless of how long they may have
        been outstanding, shall be considered as maturing in not more than nine
        months for the purpose of the exemption from Section 6 (a) of the Act
        granted by the first sentence of Section 6 (b): Not Applicable.

14.     If the security or securities are exempt from the provisions of section
        6 (a) because of the fourth sentence of section 6 (b), name the security
        outstanding on January 1, 1935, pursuant to the terms of which the
        security or securities herein described have been issued: Not
        Applicable.

15.     If the securities are exempt from the provisions of section 6 (a)
        because of any rule of the Commission other than Rule U-48 designate the
        rule under which exemption is claimed: Rule 52 (b).







                               Exhibit C - Item 19
                               -------------------



                   Exelon Corporation and Subsidiary Companies
                           Retained Earnings Analysis
                      For the Quarter Ended March 31, 2003
                                  (In millions)


Beginning Balance                                    $2,042
Net Income                                              361

Dividends:
  Common Stock                                         (149)
                                                      ------
   Ending Balance                                     $2,254
                                                      ======




                  PECO Energy Company and Subsidiary Companies
                           Retained Earnings Analysis
                      For the Quarter Ended March 31, 2003
                                  (In millions)


Beginning Balance                                      $401
Net Income                                              137
Dividends:
   Common Stock                                         (89)
   Preferred Stock                                       (2)
                                                        -----
Ending Balance                                          $447
                                                        =====



                  Commonwealth Edison and Subsidiary Companies
                           Retained Earnings Analysis
                      For the Quarter Ended March 31, 2003
                                  (In millions)


Beginning Balance                                      $577
  Net Income                                            195
  Dividends:
     Common Stock                                      (120)
                                                       -----
Ending Balance                                         $652
                                                       =====


                                Exelon Generation
                           Retained Earnings Analysis
                      For the Quarter Ended March 31, 2003
                                  (In millions)


Beginning Balance                                      $924
  Net Income                                             56
  Dividends:
     Common Stock                                         0
                                                       ----
Ending Balance                                         $980
                                                       ====




                            PECO Energy Power Company
                           Retained Earnings Analysis
                     For the Quarter Ended December 3, 2002
                                  (In millions)


Beginning Balance                                       $36
  Net Income                                              3
  Dividends:
     Common Stock                                         0
                                                       ----
Ending Balance                                          $39
                                                       ====


                            Susquehanna Power Company
                           Retained Earnings Analysis
                      For the Quarter Ended March 31, 2003
                                  (In millions)


Beginning Balance                                       $32
  Net Income                                              3
  Dividends:
     Common Stock                                         0
                                                       ----
Ending Balance                                          $35
                                                       ====


                          Susquehanna Electric Company
                           Retained Earnings Analysis
                      For the Quarter Ended March 31, 2003
                                  (In millions)


Beginning Balance                                       $ (9)
  Net Income (Loss)                                       (2)
  Dividends:
     Common Stock                                          0
                                                        -----
Ending Balance                                          $(11)
                                                        =====

                                ComEd of Indiana
                           Retained Earnings Analysis
                      For the Quarter Ended March 31, 2003
                                  (In millions)


Beginning Balance                                      $  2
  Net Income                                              0
  Dividends:
     Common Stock                                         0
                                                        ----
Ending Balance                                           $2
                                                        ===