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, 2004
through March 31, 2004. 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 - The sales 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:

         None.

2.       Order - The total  number of shares of Exelon  common  stock  issued or
         issuable  pursuant to options granted during the quarter under employee
         benefit  plans  and  dividend  reinvestment  plans  including  employee
         benefit plans or dividend reinvestment plans hereafter adopted:

         Options granted during the quarter:  3,494,344

3.       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.

         None.

4.       Order - If a guarantee  is issued,  (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 guaranty:



                                       1




 --------------- -------------- -------------- ------------- -----------------
     Guarantor      Beneficiary   Amount         Term          Purpose
 --------------- -------------- -------------- ------------- -----------------
 Exelon Corp.    ComEd               $605,000     12 months      Surety bonds
 --------------- -------------- -------------- ------------- -----------------
 Exelon Corp.    Generation       $57,000,000     12 months     Energy trading
 --------------- -------------- -------------- ------------- -----------------
 Exelon Corp.    PECO                $640,000     12 months      Surety bonds
 --------------- -------------- -------------- ------------- -----------------
 Exelon Corp.    Enterprises      $16,200,000     12 months      Surety bonds
 --------------- -------------- -------------- ------------- -----------------


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

         Exelon issued commercial paper during the quarter at an average
         interest rate of 1.05%. Exelon had $70 million in commercial paper
         outstanding at March 31, 2004.

6.       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
                  $-0- to $175 million at an average interest rate of 1.02%.

         b.       Overnight  commercial  paper issued through Bank One on behalf
                  of ComEd during the first quarter: None.

         c.       Exelon,  ComEd,  PECO and  Generation  maintain a $750 million
                  364-day  credit  facility  and a $750  million  3-year  credit
                  facility to support  commercial paper issuances.  At March 31,
                  2004,  sublimits  under the credit facility were $550 million,
                  $100 million, $250 million and $600 million for Exelon, ComEd,
                  PECO and Generation,  respectively.  Exelon,  ComEd,  PECO and
                  Generation had approximately $529 million,  $66 million,  $221
                  million  and $449  million  of  available  capacity  under the
                  credit  facilities  at March  31,  2004.  At March  31,  2004,
                  commercial paper outstanding was $70 million,  $81 million and
                  $165  million at Exelon,  PECO and  Generation,  respectively.
                  ComEd did not have any commercial  paper  outstanding at March
                  31, 2004.

         d.       Other: None.

         e.       Contributions  to and loans from the Utility  Money Pool:  The
                  activity  below reflects  contributions  to and loans from the
                  Money Utility Pool for the quarter ending March 31, 2004.

       Contributions to the Utility Money Pool

        -------------------- ------------------------ --------------------
        Company            Maximum Daily Contribution  Average Interest Rate
        -------------------- ------------------------ --------------------
        ComEd of Indiana                 $20,500,000                0.931%
        -------------------- ------------------------ ---------------------
        ComEd                           $487,000,000               1.0009%
        -------------------- ------------------------ ---------------------
        PECO                            $162,000,000                 .996%
        -------------------- ------------------------ ---------------------



                                       2



       Loans from the Utility Money Pool

        -------------------- ------------------------ --------------------
        Company            Maximum Daily Borrowing    Average Interest Rate
        -------------------- ------------------------ --------------------
        ComEd                            $20,500,000                0.931%
        -------------------- ------------------------ --------------------
        Generation                      $407,000,000                1.008%
        -------------------- ------------------------ --------------------
        EBSC                            $197,000,000                1.005%
        -------------------- ------------------------ --------------------


7.       Order - The  amount  and  terms of any  financings  consummated  by any
         Non-Utility  Subsidiary  that is not exempt  under rule 52 (see  U-6B-2
         requirement in number 10 below regarding  reports of issuances that are
         exempt):

         None.

8.       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 thereto:

         In the first quarter of 2004, PECO entered into a forward starting swap
         to hedge interest rate exposure associated with future debt issuances.
         The swap is designated as a cash-flow hedge that 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 transaction that was entered into in the first quarter is below.
         The transaction was unwound prior to the associated debt issuance
         during the second quarter 2004.





       --------------------------------------------------------------------------------------------------
           Exelon          Trade         Effective        Notional          Term        Counterparty
           Entity           Date           Date            Amount
       --------------------------------------------------------------------------------------------------
                                                         
            PECO          03/08/04       04/30/04        $75,000,000       30 year        JP Morgan




9.       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 such  subsidiaries
         during the quarter:

         Generation  contributed  $31.2 million of capital to Exelon New England
         Holdings, LLC.

         Exelon New England  Holdings,  LLC contributed  $31.2 million to Boston
         Generating, LLC.

10.      A list of U-6B-2  forms filed with the  Commission  during the quarter,
         including the name of the filing entity and the date of the filing:

         See Exhibit B.



                                       3



11.      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 Form 10-Q for the quarter ended March 31, 2004 for Exelon, PECO and
         Generation, Commission file numbers 1-16169, 1-1401 and 333-85496,
         respectively.

12.      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.


          -------------------------------- ----------------- ------------

          Exelon                           Amount            Ratio
          ------
          -------------------------------- ----------------- ------------

          Common Equity                              $8,699          35%
          -------------------------------- ----------------- ------------

          Preferred Securities and                      144           1%
          Minority Interests
          -------------------------------- ----------------- ------------

          Long-Term     Debt    (includes            15,936          63%
          current maturities)
          -------------------------------- ----------------- ------------

          Short-Term Debt                               316           1%
          -------------------------------- ----------------- ------------

          Total Capitalization                      $25,095       100.0%
          -------------------------------- ----------------- ------------



          ------------------------------- ------------------ ------------

          ComEd                           Amount             Ratio
          -----
          ------------------------------- ------------------ ------------

          Common Equity                              $6,445          51%
          ------------------------------- ------------------ ------------

          Preferred Securities                            7         0.1%
          ------------------------------- ------------------ ------------

          Long-Term    Debt    (includes              6,175          49%
          current maturities)
          ------------------------------- ------------------ ------------

          Short-Term Debt
          ------------------------------- ------------------ ------------

          Total Capitalization                      $12,627       100.0%
          ------------------------------- ------------------ ------------




          ------------------------------- ------------------ ------------

          PECO                            Amount             Ratio
          ----
          ------------------------------- ------------------ ------------

          Common Equity                              $1,006          16%
          ------------------------------- ------------------ ------------

          Preferred                                      87           1%
          ------------------------------- ------------------ ------------




                                       4



          ------------------------------- ------------------ ------------
          Long-Term    Debt    (includes              5,305          82%
          current maturities)
          ------------------------------- ------------------ ------------

          Short-Term Debt                                81           1%
          ------------------------------- ------------------ ------------

          Total Capitalization                       $6,479       100.0%
          ------------------------------- ------------------ ------------




          ------------------------------- ------------------ ------------

          Generation                      Amount             Ratio
          ----------
          ------------------------------- ------------------ ------------

          Member's Equity                            $2,842          41%
          ------------------------------- ------------------ ------------

          Minority Interest                              59           1%
          ------------------------------- ------------------ ------------

          Long-Term    Debt    (includes              3,664          53%
          current maturities)
          ------------------------------- ------------------ ------------

          Short-Term Debt                               391           5%
          ------------------------------- ------------------ ------------

          Total Capitalization                       $6,956       100.0%
          ------------------------------- ------------------ ------------




          ------------------------------- ------------------ ------------

          ComEd Indiana                   Amount             Ratio
          -------------
          ------------------------------- ------------------ ------------

          Common Equity                                 $33       100.0%
          ------------------------------- ------------------ ------------

          Preferred
          ------------------------------- ------------------ ------------

          Long-Term    Debt    (includes
          current maturities)
          ------------------------------- ------------------ ------------

          Short-Term Debt
          ------------------------------- ------------------ ------------

          Total Capitalization                          $33       100.0%
          ------------------------------- ------------------ ------------

13.      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.

         Retained Earnings analysis at March 31, 2004 (in millions).

        ----------------------------------- --------------------------------
        Exelon                                          Amount
        ------
        ----------------------------------- --------------------------------
        Beginning Balance                                            $2,320
        ----------------------------------- --------------------------------
        Net Income                                                      406
        ----------------------------------- --------------------------------
        Dividends:
        ----------------------------------- --------------------------------





                                       5


        ----------------------------------- --------------------------------
           Common Stock                                               (180)
        ----------------------------------- --------------------------------
        Ending Balance                                               $2,544
        ----------------------------------- --------------------------------



        ----------------------------------- --------------------------------
        PECO                                            Amount
        ----
        ----------------------------------- --------------------------------
        Beginning Balance                                              $546
        ----------------------------------- --------------------------------
        Net Income                                                      131
        ----------------------------------- --------------------------------
        Dividends:
        ----------------------------------- --------------------------------
           Common Stock                                                (90)
        ----------------------------------- --------------------------------
           Preferred Stock                                              (1)
        ----------------------------------- --------------------------------
        Ending Balance                                                 $586
        ----------------------------------- --------------------------------


        ComEd                                           Amount
        -----
        ----------------------------------- --------------------------------
        Beginning Balance                                              $883
        ----------------------------------- --------------------------------
        Net Income                                                      182
        ----------------------------------- --------------------------------
        Dividends:
        ----------------------------------- --------------------------------
           Common Stock                                               (103)
        ----------------------------------- --------------------------------
        Ending Balance (a)                                             $962
        ----------------------------------- --------------------------------

       (a) As of March 31, 2004, ComEd had  appropriated  $709 million of
           retained earnings for future dividend payments.

        ----------------------------------- --------------------------------
        ComEd of Indiana                                Amount
        ----------------------------------- --------------------------------
        Beginning Balance                                                $2
        ----------------------------------- --------------------------------
        Net Income
        ----------------------------------- --------------------------------
        Dividends:
        ----------------------------------- --------------------------------
           Common Stock
        ----------------------------------- --------------------------------
        Ending Balance                                                   $2
        ----------------------------------- --------------------------------




        ----------------------------------- --------------------------------
                 Generation                             Amount
        -------------------
        ----------------------------------- --------------------------------
        Beginning Balance                                              $602
        ----------------------------------- --------------------------------
        Net Income                                                       99
        ----------------------------------- --------------------------------
        Distribution to Member                                         (54)
        ----------------------------------- --------------------------------
        Ending Balance                                                 $647
        ----------------------------------- --------------------------------


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

         Exelon  Generation  filed  an  S-4  Registration   Statement  with  the
         Securities and Exchange Commission on March 31, 2004,  Registration No.
         333-114060.  The  registration  statement is an offer to exchange  $500
         million of Exelon Generation 5.35% Senior Notes originally issued under
         Rule 144A for $500  million of Exelon  Generation  5.35%  Senior  Notes
         which  have been  registered  under  the  Securities  Act of 1933.  The
         Registration Statement became effective on May 10, 2004.



                                       6



15.      A  copy  of  relevant   documents   (e.g.,   underwriting   agreements,
         indentures,  bank  agreements)  for the relevant  quarter will be filed
         with, or incorporated by reference from 1933 Act or 1934 Act filings in
         such Rule 24 Certificates.

         None.

16.      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 (i.e., $4 billion).

         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, 2004, Exelon's "aggregate  investment" (as defined in rule
         53(a)  under  PUHCA)  in all EWGs and FUCOs  was  approximately  $2,797
         million,  and  accordingly,  at  March  31,  2004,  Exelon's  remaining
         investment  capacity under the Modified Rule 53 Test was  approximately
         $1,203  million.  At March 31, 2004,  Exelon's  "consolidated  retained
         earnings" (as defined in rule 53(a) under PUHCA) was $2,387 million.

17.      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

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

         At March 31, 2004, Exelon's consolidated capitalization ratio was: debt
         63%, common equity 35%,  short-tem debt 1%, and minority  interests and
         preferred  1%.  (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).

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

         At March 31, 2004, the  market-to-book  ratio of Exelon's  common stock
         was 2.64 to 1.



                                       7



20.      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 preceding quarter.

         Exelon  Generation  Company  LLC  owns  three  subsidiaries  that  were
         classified as "electric  utility  companies"  under PUHCA:  PECO Energy
         Power  Co.  ("Energy  Power"),  Susquehanna  Power  Co.  ("Power")  and
         Susquehanna Electric Co.  ("Electric").  Energy Power is a Pennsylvania
         corporation and owns that portion of the Conowingo  hydroelectric lying
         in Pennsylvania.  Power is a Maryland corporation and owns the property
         in  Maryland.  Electric,  also a  Maryland  corporation,  operates  the
         project under a 1926 lease and has the right to the  electrical  output
         of the dam.  A fourth  company  in the chain,  The  Proprietors  of the
         Susquehanna  Canal, is inactive and is not an electric utility company.
         In March 2004,  Energy Power,  Power and Electric were  converted  into
         exempt  wholesale  generators.  The  investment  in these  companies is
         approximately $156 million.

21.      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,
         2004

22.      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,
         total  earnings  growth by EWG and FUCO  project in the first  quarter,
         2004

23.      Order - Provide a copy of the  consolidated  balance  sheet and  income
         statement for Ventures, Generation 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 Form 10-K for Generation filed on February 20, 2004


24.      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



                                       8



         Development  Activities and amount  expended on Development  Activities
         during the quarter just ended

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


          o    Name of the company and its immediate parent;
          o    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;
          o    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);
          o    With  respect  to   Intermediate   Subsidiaries   and   Financing
               Subsidiaries, 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; and
          o    With  respect  to  Non-U.S.  Energy  Related  Subsidiaries,   the
               business  engaged in and the location  (countries)  where it does
               business.





--------------- --------------- ---------------- -------------------- ------------- --------------------------
  Immediate       Company /         Type of           Method of          Amount              Purpose
    Parent        Subsidiary       Company /         Investment
                                  Subsidiary
--------------- --------------- ---------------- -------------------- ------------- --------------------------
                                                                   
Exelon          EBSC            Service company  Revolving credit     $133,500,000  Operating funds
                                                 loan
--------------- --------------- ---------------- -------------------- ------------- --------------------------
Generation      AmerGen         EWG              Revolving credit     $20,000,000   Operating funds
                                                 loan                 One month
                                                                      LIBOR +
                                                                      .625%
--------------- --------------- ---------------- -------------------- ------------- --------------------------
Generation      Exelon Energy   Rule 58          Revolving credit     $75,000,000   Operating funds
                Company                          loan                 One month
                                                                      LIBOR +
                                                                      .625%
--------------- --------------- ---------------- -------------------- ------------- --------------------------
Generation      Exelon New      Intermediate     Capital              $31,229,104   Operating funds
                England         Company          contribution
                Holdings., LLC
--------------- --------------- ---------------- -------------------- ------------- --------------------------
Exelon New      Boston          Intermediate     Capital              $31,229,104   Operating funds
England         Generating,     Company          contribution
Holdings., LLC  LLC
--------------- --------------- ---------------- -------------------- ------------- --------------------------
Boston          Mystic          EWG              Capital              $26,918,373   Operating funds
Generating,     Development,                     contribution
LLC             LLC
--------------- --------------- ---------------- -------------------- ------------- --------------------------
Boston          Fore River      EWG              Capital              $4,310,731    Operating funds
Generating,     Development,                     contribution
LLC             LLC
--------------- --------------- ---------------- -------------------- ------------- --------------------------
Ventures        Enterprises     Intermediate     Revolving credit     $20,000,000   Operating funds
                                company          loan
--------------- --------------- ---------------- -------------------- ------------- --------------------------
Generation      Exelon          Rule 58          Revolving credit     $500,000      Operating funds
                PowerLabs, LLC                   loan                 One month
                                                                      LIBOR plus
                                                                      .625%
--------------- --------------- ---------------- -------------------- ------------- --------------------------
Enterprises     Exelon          Holding          Revolving credit     $350,000      Provide operating funds
                Enterprises     company for      loan                 LIBOR plus
                Management,     ETCs                                  50 basis
                Inc.                                                  points
--------------- --------------- ---------------- -------------------- ------------- --------------------------




                                       9


--------------- --------------- ---------------- -------------------- ------------- --------------------------
Enterprises     F&M Holdings,   Rule 58          Revolving credit     $7,875,000    Provide operating funds
                Company, LLC                     loan
--------------- --------------- ---------------- -------------------- ------------- --------------------------
F&M Holdings,   II Services,    Rule 58          Revolving credit     $320,000      Provide operating funds
Company, LLC    LLC                              loan
--------------- --------------- ---------------- -------------------- ------------- --------------------------




26.      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.

1.       Exelon Energy Company
         Effective  January 1, 2004,  Exelon  effectuated the transfer of Exelon
         Energy Company from  Enterprises  to Generation.  Exelon Energy Company
         and its two subsidiaries, AllEnergy Gas and Electric Marketing Co., LLC
         and Texas Ohio Gas, Inc.,  provide gas and electric  services at retail
         to commercial and industrial  customers.  The transaction had no impact
         on the assets and  liabilities of Exelon Energy  Company.  Beginning in
         2004,  Exelon Energy  Company's  assets and  liabilities and results of
         operations are included in Generation's financial statements.

         The following  table  represents the assets and  liabilities  that were
         transferred to Generation (in millions):  Current assets  (including $5
         million of cash $89 Property, plant and equipment 2 Deferred debits and
         other assets 13 Current  liabilities  (96)  Deferred  credits and other
         liabilities  (10)  Accumulated  other  comprehensive  loss (2) Member's
         equity 4

2.       Exelon Investment Holdings, LLC
         Exelon  contributed  its interests in the  investments  below to Exelon
         Investment Holdings, LLC (in millions):

         Boston Financial Institutional Tax Credit X, LP               $4
         Boston Capital Corporate Tax Fund XIV                         17
         Boston Financial Institutional Tax Credit XIX, LP              7
         Boston Financial Institutional Tax Credit XXI, LP             14
         Related Corporate Partners IV, LP                              4
         Related Corporate Partners XII, LP                            12
         Related Corporate Partners XIV, LP                             4
         Summit Corporate Tax Credit Fund II, LP                        3
         USA Institutional Tax Credit Fund XXII, LP                     7



                                       10



3.       Nuclear Decommissioning Trusts
         Generation  contributed  its  nuclear   decommissioning  trust  assets,
         related  tax   liabilities  and  investments  in  subsidiaries  to  the
         following companies:





                                         Trust         Investments in        Taxes
Subsidiary                               Assets         Subsidiaries        Payable         Capital
----------                               ------         ------------        -------         -------
                                                                            
Exelon Generation Consolidation, LLC  $ 2,795,920         $ 496,141     $(1,120,569)    $(2,171,492)
Limerick 1 NQF, LLC                         2,533                              (124)         (2,409)
Limerick 2 NQF, LLC                         3,377                              (517)         (2,860)
PeachBottom 1 NQF, LLC                     19,938                            (1,505)        (18,433)
PeachBottom 2 NQF, LLC                     31,515                            (2,009)        (29,506)
PeachBottom 3 NQF, LLC                     37,432                            (2,830)        (34,602)
Dresden 1 NQF, LLC                         69,613                           (26,038)        (43,575)
Dresden 2 NQF, LLC                        110,629                           (43,457)        (67,172)
Dresden 3 NQF, LLC                        108,894                           (42,575)        (66,319)
LaSalle 1 NQF, LLC                         17,389                            (6,821)        (10,568)
LaSalle 2 NQF, LLC                          8,838                            (3,478)         (5,360)
Byron 1 NQF, LLC                            3,572                            (1,440)         (2,132)
Byron 2 NQF, LLC                            9,632                            (3,793)         (5,839)
Braidwood 1 NQF, LLC                        6,809                            (2,705)         (4,104)
Braidwood 2 NQF, LLC                        4,944                            (1,979)         (2,965)
Quad Cities 1 NQF, LLC                     63,998                           (25,118)        (38,880)
Quad Cities 2 NQF, LLC                     67,858                           (26,637)        (41,221)
Salem 1 NQF, LLC                           18,170                            (1,406)        (16,764)
Salem 2 NQF, LLC                           12,392                            (1,083)        (11,309)
Zion 1 NQF, LLC                            70,638                           (27,715)        (42,923)
Zion 2 NQF, LLC                            78,155                           (30,679)        (47,476)
AmerGen Consolidation, LLC                542,460           619,290          (5,527)     (1,156,223)
AmerGen TMI NQF, LLC                      162,563                                 -        (162,563)
AmerGen Clinton NQF, LLC                  160,957                                 -        (160,957)
AmerGen Oyster Creek NQF, LLC             298,718                                 -        (298,718)





27.      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.




                                                    

   Exelon Corporation Subsidiaries and Investments
   As of March 31, 2004
                                                  Common    Parent       Other                  PUHCA
                                                  Shares    Voting      Voting             Type of Business
    Tier Company name                              Owned     Power       Power              And Authority
    ---- ----------------------------------      -------   -------     -------    -------------------------------
         Exelon Corporation                                                        Public Utility Holding Company
     1   Exelon Business Services Company                 1 100.00%                Subsidiary Service Company
     1   Unicom Resources, Inc.                         100 100.00%                Inactive
     1   Unicom Assurance Company, Ltd. *                NA 100.00%                Approved in Merger Order
                                                                                   (Captive Insurance Company)
     1   Exelon Investment Holdings, LLC                 NA 100.00%                Intermediate Subsidiary
     2   Boston Financial Institutional Tax              NA 10.72%                 Approved in Merger Order (tax
         Credit Fund X                                                             advantaged transactions -
                                                                                   housing)
     2   Boston Financial Institutional Tax              NA 43.69%                 Approved in Merger Order (tax
         Credit Fund XIV                                                           advantaged transactions -
                                                                                   housing)
     2   Boston Financial Institutional Tax              NA 14.19%                 Approved in Merger Order (tax
         Credit Fund XIX                                                           advantaged transactions -
                                                                                   housing)
     2   Boston Financial Institutional Tax              NA 34.54%                 Approved in Merger Order (tax
         Credit Fund XXI                                                           advantaged transactions -
                                                                                   housing)
     2   Related Corporate Partners XII, L.P.            NA 36.03%                 Approved in Merger Order (tax
                                                                                   advantaged transactions -
                                                                                   housing)
     2   Related Corporate Partners XIV, L.P.            NA 15.99%                 Approved in Merger Order (tax
                                                                                   advantaged transactions -
                                                                                   housing)
     2   Summit Corporate Tax Credit Fund II             NA 33.00%                 Approved in Merger Order (tax
                                                                                   advantaged transactions -
                                                                                   housing)
     2   USA Institutional Tax Credit Fund XXII          NA 24.49%                 Approved in Merger Order (tax
                                                                                   advantaged transactions -
                                                                                   housing)
     1   Exelon Capital Trust I *                       N/A 100.00%                Financing company
     1   Exelon Capital Trust II *                      N/A 100.00%                Financing company
     1   Exelon Capital Trust III *                     N/A 100.00%                Financing company
     1   Unicom Investment, Inc.                        100 100.00%                Approved in Merger Order (Tax
                                                                                   advantaged transactions)
     2   Scherer Holdings 1, LLC                         NA 100.00%                Approved in Merger Order (Tax
                                                                                   advantaged transactions)
     2   Scherer Holdings 2, LLC                         NA 100.00%                Approved in Merger Order (Tax
                                                                                   advantaged transactions)
     2   Scherer Holdings 3, LLC                         NA 100.00%                Approved in Merger Order (Tax
                                                                                   advantaged transactions)
     2   Spruce Holdings G.P. 2000, LLC                  NA 100.00%                Approved in Merger Order (Tax
                                                                                   advantaged transactions)
     2   Spruce Holdings L.P. 2000, LLC                  NA 100.00%                Approved in Merger Order (Tax
                                                                                   advantaged transactions)


                                       11





     3   Spruce Equity Holdings, L.P.                    NA 99.00%  Spruce LP      Approved in Merger Order (Tax
                                                                                   advantaged transactions)
                                                         NA 1.00% Spruce GP
     4   Spruce Holdings Trust                           NA 100.00%                Approved in Merger Order (Tax
                                                                                   advantaged transactions)
     2   Wansley Holdings 1, LLC                         NA 100.00%                Approved in Merger Order (Tax
                                                                                   advantaged transactions)
     2   Wansley Holdings 2, LLC                         NA 100.00%                Approved in Merger Order (Tax
                                                                                   advantaged transactions)
     1   Exelon Ventures Company, LLC                    NA 100.00%                Public Utility Holding Company
                                                                                   First Tier
     2   Exelon SynFuel I, LLC                           NA 100.00%                Intermediate Subsidiary
     3   DTE Buckeye, LLC *                                 59.00%
     2   Exelon SynFuel II, LLC                          NA 100.00%                Intermediate Subsidiary
     3   DTE Belews Creek, LLC *                            99.00%
     2   Exelon Generation Company, LLC                  NA 100.00%                Public Utility Holding Company
                                                                                   Second Tier and Utility Company
     3   Exelon Generation Finance Company, LLC          NA 100.00%                Approved in Financing Order
                                                                                   (Financing)
     3   ExTex Retail Services Company, LLC              NA 100.00%                Rule 58 - 5
     3   Penesco Company, LLC                            NA 100.00%                Rule 58
     3   Port City Power, LLC *                          NA 100.00%                Approved in Investment Order
                                                                                   (Development Company)
     3   Southeast Chicago Energy Project, LLC           NA 100.00%                Exempt Wholesale Generator
     3   Concomber Ltd                                   NA 100.00%                Approved in Merger Order
                                                                                   (Captive Insurance Company)
     3   Cenesco Company, LLC                            NA 100.00%                Rule 58
     3   Exelon Allowance Management Company,            NA 100.00%                Rule 58
         LLC
     3   Susquehanna Electric Company                 1,000 100.00%                Utility Company
     3   Exelon SHC, Inc.                                NA 85.00%  Generation  -  Intermediate Subsidiary LP
                                                         NA 14.00% Peaker DG - GP
                                                         NA 1.00% Ventures - LP
     4   Keystone Fuels, LLC                             NA 20.99%                 Rule 58
     4   Conemaugh Fuels,  LLC                           NA 20.72%                 Rule 58
     4   EXRES, SHC, Inc. *                              NA 50.00%                 Intermediate Subsidiary
     5   ExRES Power Holdings, Inc.                         100.00%                Intermediate Subsidiary
     6   National Energy Development, Inc. *            100 100.00%                Intermediate Subsidiary
     6   Sithe Energies, Inc. *                             56.00%  Fossil HoldingsCombination Exempt Wholesale
                                                                                   Generator and  Rule 58
                                                             44.00% NEDI
     3   Nuclear US Holdings, Inc.                   73,000 100.00%                Intermediate Subsidiary
     4   Nuclear US Investments, LLC                     NA 100.00%                Intermediate Subsidiary
     4   Nuclear, Limited Partnership                    NA 99.00%  Nuclear US     Intermediate Subsidiary
                                                                    Holdings, Inc.
                                                                    as  LP
                                                         NA 1.00% Nuclear US
                                                                    Investments
                                                                    LLC, as GP
     5   AmerGen Energy Company, LLC                     NA 50.00%  Generation     Exempt Wholesale Generator
                                                         NA 50.00% Nuclear,
                                                                    Limited
                                                                    Partnership
     6   AmerGen Consolidation, LLC                      NA 100.00%                Intermediate Subsidiary
     6   AmerGen TMI NQF, LLC                            NA 100.00%                Intermediate Subsidiary
     6   AmerGen Oyster Creek NQF, LLC                   NA 100.00%                Intermediate Subsidiary
     6   AmerGen Clinton NQF, LLC                        NA 100.00%                Intermediate Subsidiary




                                       12


     3   PECO Energy Power Company                  984,000 100.00%                Electric Utility Company and
                                                                                   Registered Holding Company
     4   Susquehanna Power Company                1,273,000 100.00%                Electric Utility Company
     5   The Proprietors of the Susquehanna              NA 100.00%                Inactive
         Canal*
     3   Exelon Generation International, Inc. *         NA 100.00%                Intermediate Subsidiary
     3   Exelon Peaker Development General, LLC          NA 100.00%                Intermediate Subsidiary
     3   Exelon Peaker Development Limited, LLC          NA 100.00%                Intermediate Subsidiary
     4   ExTex LaPorte Limited Partnership *             NA 99.00%  Peaker LG - LP Exempt Wholesale Generator
                                                         NA 1.00% Peaker DG - GP
     3   ExTex Marketing, LLC                            NA 100.00%                Rule 58
     4   ExTex Power, LP                                 NA 99.00%  ExTex          Rule 58
                                                                    Marketing, LLC- LP
                                                         NA 1.00% Generation - GP
     3   Exelon AOG Holding # 1, Inc.                       100.00%                Intermediate Subsidiary
     3   Exelon AOG Holding # 2, Inc.                       100.00%                Intermediate Subsidiary
     4   Exelon New England Power Marketing, LP          NA 99.00%  AOG # 2 - LP   Rule 58
                                                         NA 1.00% AOG # 1 - GP
     3   Exelon New England Holdings, LLC                NA 100.00%                Intermediate Subsidiary
     4   Exelon New England Power Services, Inc.            100.00%                Rule 58
     4   Exelon New England Development, LLC             NA 100.00%                Development Company
     4   Exelon Wyman, LLC                               NA 100.00%                Exempt Wholesale Generator
     4   Exelon Edgar, LLC                               NA 100.00%                Exempt Wholesale Generator
     4   Exelon Framingham, LLC                          NA 100.00%                Exempt Wholesale Generator
     4   Exelon Framingham Development, LLC              NA 100.00%                Development Company
     4   Exelon West Medway, LLC                         NA 100.00%                Exempt Wholesale Generator
     4   Exelon West Medway Expansion, LLC *             NA 100.00%                Development Company
     4   Exelon West Medway Development, LLC             NA 100.00%                Development Company
     4   Exelon Boston Services, LLC                     NA 100.00%                Rule 58
     4   Exelon New Boston, LLC                          NA 100.00%                Exempt Wholesale Generator
     4   Exelon Hamilton, LLC                            NA 100.00%                Rule 58
     4   Boston Generating, LLC                          NA 100.00%                Intermediate Subsidiary
     5   Mystic 1, LLC                                   NA 100.00%                Exempt Wholesale Generator
     5   Mystic Development, LLC                         NA 100.00%                Exempt Wholesale Generator
     5   Fore River Development, LLC                     NA 100.00%                Exempt Wholesale Generator
     3   Exelon PowerLabs, LLC                           NA 100.00%                Rule 58 (vii)
     3   Exelon Generation Consolidation, LLC            NA 100.00%                Intermediate Subsidiary
     4   Braidwood 1 NQF, LLC                            NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Braidwood 2 NQF, LLC                            NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Byron 1 NQF, LLC                                NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Byron 2 NQF, LLC                                NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Dresden 1 NQF, LLC                              NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Dresden 2 NQF, LLC                              NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Dresden 3 NQF, LLC                              NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.




                                       13


     4   LaSalle 1 NQF, LLC                              NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   LaSalle 2 NQF, LLC                              NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Limerick 1 NQF, LLC                             NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Limerick 2 NQF, LLC                             NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   PeachBottom 1 NQF, LLC                          NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   PeachBottom 2 NQF, LLC                          NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   PeachBottom 3 NQF, LLC                          NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Quad Cities 1 NQF, LLC                          NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Quad Cities 2 NQF, LLC                          NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Salem 1 NQF, LLC                                NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Salem 2 NQF, LLC                                NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Zion 1 NQF, LLC                                 NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     4   Zion 2 NQF, LLC                                 NA 100.00%                Successor to trusts approved in
                                                                                   the merger order.
     3   Exelon Energy Company                          100 100.00%                Rule 58
     4   AllEnergy Gas & Electric Marketing              NA 100.00%                Rule 58
         Company, LLC
     5   Texas Ohio Gas, Inc.                           100 100.00%                Rule 58
     2   Exelon Enterprises Company, LLC                 NA 100.00%                Non-Utility Holding Company
                                                                                   Second Tier
     3   Exelon Enterprises Management, Inc.                100.00%                Approved in Merger Order
                                                                                   (investments in Rule 58 and
                                                                                   Telecommunications)
     4   CIC Global, LLC                                 NA 50.00%                 ETC
     4   UniGrid Energy, LLC*                            NA 50.00%                 ETC - Inactive
     4   Phoenix Foods, LLC                                  5.00%                 ETC
     4   ECPH, LLC                                       NA 100.00%                Hold ETC investments
     4   Exelon Capital Partners, Inc.                  100 100.00%                Approved in Merger Order
                                                                                   (investments in Rule 58 and
                                                                                   Telecommunications)
     5   Automated Power Exchange                            5.80%                 ETC
     5   Clean Air Partners, Inc.                           14.30%                 ETC
     5   Soft Switching Technologies, Inc.                   4.20%                 ETC
     5   Nxt Phase Corporation                               6.10%                 ETC
     5   ECP Telecommunications Holdings, LLC            NA 100.00%                Holds ETCs
     6   Energy Trading Company                             100.00%                ETC
     7   Entrade, Inc.                                       < 10%                 ETC
     7   WorldWide Web Network Corp                          < 10%                 ETC
     6   Enerwise Global Technologies, Inc.                 16.30%                 ETC
     6   Everest Broadband Networks                         15.50%                 ETC
     6   Exotrope, Inc.                                      < 10%                 ETC
     6   Media Station, Inc.                                 2.48%                 ETC
     6   NEON Communications, Inc.                          10.01%                 Approved in Merger Order
                                                                                   (Investment)



                                       14


     6   SoftComp, Inc (PermitsNow)                         15.51%                 Inactive
     6   Planalytics, Inc.                                   9.60%                 ECP
     6   Pantellos Corporation                               3.80%                 ETC
     6   SmartSynch                                         10.50%                 ETC
     6   VITTS Network Group, Inc.                          20.26%                 ETC
     6   OmniChoice.com, Inc.                               30.10%                 ETC

     5   Exelon Enterprises Investments, Inc.               100.00%                Approved in Merger Order
                                                                                   (investments in Rule 58 and
                                                                                   telecommunications)

     6   Kinetic Venture Fund I, LLC                        22.22%                 Merger U-1 Amendment # 5
                                                                                   (Reserved Jurisdiction)

     6   Kinetic Venture Fund II, LLC                       14.30%                 Merger U-1 Amendment # 5
                                                                                   (Reserved Jurisdiction)
     6   Enertech Capital Partners II                        6.10%                 ETC

     6   UTECH Climate Challenge Fund, L.P.                 24.30%                 Approved in Merger Order
                                                                                   (energy related  - venture
                                                                                   capital Rule 58)

     6   EEI Telecommunications Holdings, LLC            NA 100.00%                ETC
     7   Exelon Communications Holdings, LLC             NA 100.00%                ETC
     8   PHT Holdings, LLC                               NA 100.00%                Held by ETC
     9     PECO Hyperion Telecommunications              NA 49.00%  PHT Holdings,  Held by ETC LLC
                                                         NA  1.00%  PECO
     8   Exelon Communications Company, LLC              NA 100.00%                Held by ETC
     3   F & M Holdings Company, LLC                     NA 100.00%                Rule 58
     4   Oldco VSI, Inc.                                100 100.00%                Rule 58
     5   EGW Meter Services, LLC *                       NA 100.00%                Rule 58
     4   II Services, Inc.                                  100.00%                Rule 58
     5   EIS Engineering, Inc.                              100.00%                Rule 58
     6   InfraSource Field Services LLC *                NA 100.00%                Rule 58
     4   NEWCOSY, Inc.                                    1 100.00%                Rule 58
     4   Fischbach and Moore Electric, Inc.               1 100.00%                Rule 58
     4   NEWCOTRA, Inc.*                                  1 100.00%                Rule 58
     5   Fischbach and Moore, Inc.                        1 100.00%                Rule 58
     6   Fischbach and Moore Electrical                   1 100.00%                Rule 58
         Contracting, Inc.*
     6   T.H. Green Electric Co., Inc.*                   1 100.00%                Rule 58
     5   Rand-Bright Corporation                          1 100.00%                Rule 58
         OSP Servicios S.A. de C.V.*                        100.00%                Rule 58
     5   Universal Network Development, Corp.*              49.00%                 Rule 58
     4   EIS Investments, LLC*                           NA 100.00%                Rule 58
     5   WCB Services, LLC *                             NA 49.00%                 Rule 58
     3   Exelon Services, Inc.                              100.00%                Rule 58
     4   Exelon Services Federal Group, Inc.                100.00%                Rule 58
     3   Unicom Power Holdings, LLC                      NA 100.00%                Rule 58
     3   Unicom Power Marketing, Inc.                   100 100.00%                Rule 58
     3   Adwin Equipment Company                            100.00%                Rule 58
     3   Exelon Thermal Holdings, Inc.                  100 100.00%                Rule 58
     4   ETT North America, Inc.                         10 100.00%                Rule 58
     5   Northwind Thermal Technologies Canada,          10 100.00%                Merger Order Reserved
         Inc.                                                                      Jurisdiction;  Investment  U-1 in Docket
                                                                                   70-9691  (Rule 58 operating
                                                                                   outside the U.S.)
     6   ETT Canada, Inc.                                10 100.00%                Merger Order Reserved
                                                                                   Jurisdiction ; Investment U-1
                                                                                   in Docket 70-9691 (Rule 58
                                                                                   operating outside the U.S.)
     7   Northwind Windsor                               NA 50.00%                 Merger Order Reserved
                                                                                   Jurisdiction ; Investment U-1
                                                                                   in Docket 70-9691 (Rule 58
                                                                                   operating outside the U.S.)
     4   ETT Nevada, Inc.                               100 100.00%                Rule 58
     5   Northwind Aladdin, LLC *                        NA 75.00%                 Rule 58
     4   Exelon Thermal Development, Inc.               100 100.00%                Rule 58
     4   ETT Boston, Inc.                               100 100.00%                Rule 58
     4   Northwind Boston, LLC                           NA 25.00%                 Rule 58
     4   ETT Houston, Inc.                              100 100.00%                Rule 58
     4   Thermal Chicago Corporation*                   100 100.00%                Rule 58




                                       15


     5   Northwind Chicago, LLC                        100% 100.00%                Rule 58
                                                     Member
                                                   Interest
     5   Exelon Thermal Technologies, Inc.              100 100.00%                Rule 58
     5   ETT National Power Inc.                        100 100.00%                Rule 58
     6   Northwind Midway, LLC*                        100% 100.00%                Rule 58
                                                     Member
                                                   Interest
     1   Exelon Energy Delivery Company, LLC             NA 100.00%                Intermediate public utility
                                                                                   holding company
     2   PECO Energy
         Company                                170,478,507 100.00%                Electric and Gas Utility Company
     3   East Coast Natural Gas Cooperative, LLP         NA 41.12%                 Rule 58
     3   Horizon Energy Company*                      1,000 100.00%                Inactive
     3   Adwin Realty Company                         1,000 100.00%                Merger Order Reserved
                                                                                   Jurisdiction (Real Estate) (2)
     4   Ambassador II Joint Venture *                   NA 50.00%                 Merger Order Reserved
                                                                                   Jurisdiction (Real Estate) (2)
     4   Bradford Associates *                           NA 50.00%                 Merger Order Reserved
                                                                                   Jurisdiction (Real Estate) (2)
     4   Franklin Town Towers Associates *               50 50.00%                 Merger Order Reserved
                                                                                   Jurisdiction (Real Estate) (2)
     4   Henderson Ambassador Associates *               NA 50.00%                 Merger Order Reserved
                                                                                   Jurisdiction (Real Estate) (2)
     3   PECO Energy Transition Trust                    NA 100.00%                Approved in Merger Order
                                                                                   (Financing)
     3   PECO Energy Capital Corp.                    1,000 100.00%                Approved in Merger Order
                                                                                   (Financing)
     4   PECO Energy Capital Trust III                   NA 100.00%                Approved in Merger Order
                                                                                   (Financing)
     4   PECO Energy Capital, LP                         NA  3.00%                 Approved in Merger Order
                                                                                   (Financing)
     3   PECO Energy Capital Trust IV                    NA 100.00%                Financing
     3   PECO Energy Capital Trust V*                    NA 100.00%                Financing
     3   PECO Energy Capital Trust VI*                   NA 100.00%                Financing
     3   ExTel Corporation, LLC                          NA 100.00%                Intermediate Subsidiary
     4   PECO Wireless, LP                               NA 99.00%  PECO           Intermediate Subsidiary
                                                             1.00% ExTel
     5   ATNP Finance Company                           100 100.00%                Approved in Merger Order
                                                                                   (Financing)
     5   PEC Financial Services, LLC                     NA 100.00%                Approved in Merger Order
                                                                                   (Financing)
     3   Adwin (Schuylkill) Cogeneration, Inc. *            50.00%                 ERC
     2   Commonwealth Edison                    127,002,904 99.90%                 Public Utility Holding Company,
         Company                                                                   Second Tier; Electric Utility
                                                                                   Company
     3   Commonwealth Edison Company of             908,084 100.00%                Electric Utility Company
         Indiana, Inc.
     3   ComEd Financing I *                             NA 100.00%                Approved in Merger Order
                                                                                   (Financing)
     3   ComEd Financing II *                            NA 100.00%                Approved in Merger Order
                                                                                   (Financing)
     3   ComEd Financing III                             NA 100.00%                Financing
     3   ComEd Funding, LLC                              NA 100.00%                Approved in Merger Order
                                                                                   (Financing)
     4   ComEd Transitional Funding Trust                NA 100.00%                Approved in Merger Order
                                                                                   (Financing)
     3   Commonwealth Research Corporation*             200 100.00%                Rule 58
     3   Edison Development Company                     741 100.00%                Approved in Merger Order
                                                                                   (economic and community
                                                                                   development)




                                       16


     3   Edison Development Canada Inc.              15,158 100.00%                Merger Order reserved
                                                                                   jurisdiction; Investment U-1 in
                                                                                   Docket 70-9691 (economic and
                                                                                   community development)
     4   Edison Finance Partnership                      NA 100.00%                Merger Order reserved
                                                                                   jurisdiction; Investment U-1 in
                                                                                   Docket 70-9691 (Financing)
        3Chicago Equity Fund                               <10%
        3Dearborn Park Corporation                         <10%
        3I.L.P. Fund C/O Chicago Capital Fund              <10%

28.      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 Appendix B.









                                       17




         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 28, 2004

                                                        EXELON CORPORATION

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


                                       18




                                    Exhibit A
                                    ---------

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

AmerGen                    AmerGen Energy Company, LLC
AOG # 1                    Exelon AOG Holding # 1, Inc.
AOG # 2                    Exelon AOG Holding # 2, Inc.
ComEd                      Commonwealth Edison Company
ComEd of Indiana           Commonwealth Edison Company of Indiana, Inc.
EBSC                       Exelon Business Services Company
Exelon                     Exelon Corporation
Enterprises                Exelon Enterprises Company, LLC
ETCs                       Exempt telecommunications companies
EWGs                       Exempt wholesale generators
ExTel                      ExTel Corporation, LLC
FUCO                       Foreign utility company
ExTex                      ExTex LaPorte Limited Partnership
Fossil Holdings            Exelon (Fossil) Holdings, Inc.
Generation                 Exelon Generation Company, LLC
GP                         General partner
LP                         Limited Partner
NEDI                       National Energy Development, Inc.
Peaker DG                  Exelon Peaker Development General, LLC
Peaker DL                  Exelon Peaker Development Limited, 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.
ENEH                       Exelon New England Holdings, LLC
Southeast Chicago          Southeast Chicago Energy Project, LLC
SECO                       Susquehanna Electric Company
SPCO                       Susquehanna Power Company
Spruce, GP                 Spruce Holdings GP 2000, LLC
Spruce, LP                 Spruce Holdings LP 2000, LLC
Ventures                   Exelon Ventures Company, LLC



                                       19



                               Exhibit B - Item 16
                               -------------------
A.
--
EBSC 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): Revolving credit loan

2.   Issue, renewal or guaranty: Issue.

3.   Principal amount of each security: $133.5 million.

4.   Rate of interest per annum of each security: Commercial paper, market rate.

5.   Date of issue, renewal or guaranty of each security: First quarter 2004

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

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

9.   Collateral given with each security: None

10.  Consideration given for each security: Cash

11.  Application of proceeds for each security: The proceeds from the revolving
     credit loan are used to provide 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 (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 are exempt from the provisions of section
     6(a) by virtue of Section 6(b), give the figures that indicate that the
     securities 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 principle 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.



                                       20



14.  If the 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)


                                       22




B.
--
Exelon Energy 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): Revolving credit loan

2.   Issue, renewal or guaranty: Issue.

3.   Principal amount of each security: $75 million.

4.   Rate of interest per annum of each security: One month LIBOR plus .625%

5.   Date of issue, renewal or guaranty of each security: First quarter 2004

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

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

9.   Collateral given with each security: None

10.  Consideration given for each security: Cash

11.  Application of proceeds for each security: The proceeds from the revolving
     credit loan are used to provide 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 (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 are exempt from the provisions of section
     6(a) by virtue of Section 6(b), give the figures that indicate that the
     securities 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 principle 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


                                       23




     sentence of
     section 6(b): Not Applicable.

14.  If the 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)


                                       24





C.
--
Enterprises  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): Revolving credit loan

2.   Issue, renewal or guaranty: Issue.

3.   Principal amount of each security: $20 million.

4.   Rate of interest per annum of each security: Variable

5.   Date of issue, renewal or guaranty of each security: First quarter 2004

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

8.   Name of the person to whom each security was issued, renewed or guaranteed:
     EEI Telecommunications Holdings, LLC

9.   Collateral given with each security: None

10.  Consideration given for each security: Cash

11.  Application of proceeds for each security: The proceeds from the revolving
     credit loan are used to provide 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 (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 are exempt from the provisions of section
     6(a) by virtue of Section 6(b), give the figures that indicate that the
     securities 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 principle 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.



                                       25




14.  If the 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)


                                       26




D.
--

Exelon PowerLabs,  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): Revolving credit loan

2.   Issue, renewal or guaranty: Issue.

3.   Principal amount of each security: $500,000

4.   Rate of interest per annum of each security: One month LIBOR plus .625%

5.   Date of issue, renewal or guaranty of each security: First quarter 2004

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

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

9.   Collateral given with each security: None

10.  Consideration given for each security: Cash

11.  Application of proceeds for each security: The proceeds from the revolving
     credit loan are used to provide 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 (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 are exempt from the provisions of section
     6(a) by virtue of Section 6(b), give the figures that indicate that the
     securities 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 principle 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



                                       27



     sentence of section 6(b): Not Applicable.

14.  If the 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)


                                       28




E.
--

Exelon  Enterprises  Management,  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): Revolving credit loan

2.   Issue, renewal or guaranty: Issue.

3.   Principal amount of each security: $350,000

4.   Rate of interest per annum of each security: One month LIBOR plus .625%

5.   Date of issue, renewal or guaranty of each security: First quarter 2004

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

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

9.   Collateral given with each security: None

10.  Consideration given for each security: Cash

11.  Application of proceeds for each security: The proceeds from the revolving
     credit loan are used to provide 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 (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 are exempt from the provisions of section
     6(a) by virtue of Section 6(b), give the figures that indicate that the
     securities 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 principle 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


                                       29



     sentence of section 6(b): Not Applicable.

14.  If the 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)



                                       30




F.
--

F&M Holdings 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): Revolving credit loan

2.   Issue, renewal or guaranty: Issue.

3.   Principal amount of each security: $7.875 million.

4.   Rate of interest per annum of each security: Variable

5.   Date of issue, renewal or guaranty of each security: First quarter 2004

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

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

9.   Collateral given with each security: None

10.  Consideration given for each security: Cash

11.  Application of proceeds for each security: The proceeds from the revolving
     credit loan are used to provide 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 (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 are exempt from the provisions of section
     6(a) by virtue of Section 6(b), give the figures that indicate that the
     securities 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 principle 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



                                       31



     sentence of section 6(b): Not Applicable.

14.  If the 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.
--
II  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): Revolving credit loan

2.   Issue, renewal or guaranty: Issue.

3.   Principal amount of each security: $320 thousand

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 2004

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

8.   Name of the person to whom each security was issued, renewed or guaranteed:
     F&M Holdings, Company, LLC

9.   Collateral given with each security: None

10.  Consideration given for each security: Cash

11.  Application of proceeds for each security: The proceeds from the revolving
     credit loan are used to provide 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 (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]



                                       32




13.  If the security or securities are exempt from the provisions of section
     6(a) by virtue of Section 6(b), give the figures that indicate that the
     securities 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 principle 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 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)





                                       33