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


                       SECURITIES AND EXCHANGE COMMISSION
                                Washington, D.C.

                                    FORM U5B
                             REGISTRATION STATEMENT
                       Filed Pursuant to Section 5 of the
                   Public Utility Holding Company Act of 1935


         Exelon Ventures Company, LLC and Exelon Generation Company, LLC

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

                               Name of Registrant
               Name, Title And Address Of Officer To Whom Notices
        And Correspondence Concerning This Statement Should Be Addressed

                               Randall E. Mehrberg
                     Senior Vice President & General Counsel
                               Exelon Corporation
                            10 South Dearborn Street
                                   37th Floor
                             Chicago, Illinois 60603





                            Glossary of Defined Terms

Act                  Public Utility Holding Company Act of 1935, as amended

ComEd                Commonwealth Edison Company

Commission           Securities and Exchange Commission

Exelon Enterprises   Exelon Enterprises Company, LLC

Exelon               Exelon Corporation

Exelon Generation    Exelon Generation Company, LLC

Exelon Ventures      Exelon Ventures Company, LLC

Financing U-1        The Form U-1 Application/Declaration filed by Exelon
                     Corporation, et al. in File No. 70-9693

Merger U-1           The Form U-1  Application/Declaration  filed by Exelon
                     Corporation in File No. 70-9645

N/A                   Not applicable or not available

PECO                 PECO Energy Company

Unicom               Unicom Corporation








--------------------------------------------------------------------------------
                                                                        Page 1




                             REGISTRATION STATEMENT

1.  Exact Name of Registrant:  Exelon Ventures Company, LLC and Exelon
Generation Company, LLC

2. Address of Principal Executive Offices: 10 South Dearborn Street
                                           37th Floor
                                           Chicago, Illinois 60603

3. Name and address of Chief Accounting Officer: Jean H. Gibson
                                                 Vice President and
                                                 Corporate Controller
                                                 Exelon  Corporation,
                                                 10 South Dearborn Street
                                                 37th Floor
                                                 Chicago, Illinois 60603

4.  Certain information as to the registrant and each subsidiary
    company thereof:







                     Exelon Ventures Company, LLC & Exelon Generation Company, LLC & Subsidiaries



Name of Company                                           Organization        State         Type of Business
---------------                                           ------------        -----         ----------------
                                                                                  
   Exelon Ventures Company, LLC                           LLC                 DE            Holding Company
     Exelon Generation Company, LLC                       LLC                 PA            Holding Company
       PECO Energy Power Company                          Corporation         PA            Utility
         Susquehanna Power Company                        Corporation         MD            Utility
           The Proprietors of the Susquehanna             Corporation         MD            Inactive
              Canal
       Susquehanna Electric Company                       Corporation         MD            Utility
       AmerGen Energy Company, LLC (50%                   LLC                 DE            Exempt Wholesale Generator
         interest)
         AmerGen Vermont, LLC                             LLC                 VT            Exempt Wholesale Generator
       Exelon (Fossil) Holdings, Inc.                     Corporation         DE            Investment
         Sithe Energies Inc. (49.9% interest)             Corporation         DE            Energy Related
       Exelon Peaker Development General, LLC             LLC                 DE            Investment

       Exelon Peaker Development Limited, LLC             LLC                 DE            Investment

         ExTex LaPorte L.P.                               LP                  TX            Exempt Wholesale

       Concomber Ltd.                                     Corporation         Bermuda       Captive Insurance Company

     Exelon Enterprises Company, LLC                      LLC                 PA            Energy Services

                                                          Corporation         DE            Energy-related
       Exelon Energy Company


         Exelon Energy Ohio, Inc.                         Corporation         DE            Energy-related
         AllEnergy Gas & Electric Marketing               LLC                 DE            Energy-related
           Company, LLC
           Texas Ohio Gas, Inc.
         Exelon Mechanical Services, Inc.                 Corporation         IL            Energy Services
           Systems Engineering and Management Corp.       Corporation         TN            Energy Related


--------------------------------------------------------------------------------
                                                                        Page 2


Name of Company                                           Organization        State         Type of Business
---------------                                           ------------        -----         ----------------

    Unicom Power Holdings Inc.                            Corporation         DE            Energy-related
    Unicom Power Marketing Inc.                           Corporation         DE            Energy-related
    Unicom Healthcare Management Inc.                     Corporation         IL            Medical Plan Liabilities
    UT Holdings Inc.                                      Corporation         DE            Energy systems
      Northwind Chicago LLC                               LLC                 DE            Energy systems
      Unicom Thermal Development Inc.                     Corporation         DE            Energy systems
      Exelon Thermal Technologies Inc.                    Corporation         IL            Energy systems
      Exelon Thermal Technologies                         Corporation         DE            Energy systems
        Boston Inc.
        Northwind Boston LLC (25%                         LLC                 MA            Energy systems
          interest)
      Exelon Thermal Technologies                         Corporation         DE            Energy systems
        Houston Inc.
        Northwind Houston LLC (25%                        LLC                 DE            Energy systems
          interest)
          Northwind Houston LP (25%                       Limited             DE            Energy systems
            interest)                                     Partnership
      Exelon Thermal Technologies North                   Corporation         DE            Energy systems
        America Inc.
        Northwind Thermal Technologies                    Corporation         Canada        Energy systems
          Canada Inc.
          Unicom Thermal Technologies                     Corporation         Canada        Energy systems
            Canada Inc.
      UTT National Power Inc.                             Corporation         IL            Energy systems
        Northwind Midway LLC                              LLC                 DE            Energy systems
      UTT Nevada Inc.                                     Corporation         NV            Energy systems
        Northwind Aladdin LLC (75%                        LLC                 NV            Energy systems
          interest)
        Northwind Las Vegas LLC (50%                      LLC                 NV            Energy systems
          interest)
      UTT Phoenix, Inc.                                   Corporation         DE            Energy systems
        Northwind Arizona Development                     LLC                 DE            Energy systems
          LLC (50% interest)
        Northwind Phoenix LLC (50%                        LLC                 DE            Energy systems
          interest)
    Exelon Communications Holdings,LLC                    LLC                 PA            Communications
      AT&T Wireless PCS of Philadelphia,                  LLC                 DE            Communications
        LLC (49% interest)
      PHT Holdings LLC                                    LLC                 DE            Communications
        PECO Hyperion Communications                      Partnership         PA            Communications
            (49% interest held; PECO holds
             1% interest)
      Exelon Communications LLC                           LLC                 PA            Communications

     Energy Trading Company                               Corporation         DE            Investment


     Exelon Enterprises Management, Inc.                  Corporation         PA            Investment (in Energy-
                                                                                              Related and
                                                                                              Telecommunications)
      UniGrid Energy LLC (50% interest)                   LLC                 DE            Energy-related
      CIC Global, LLC (50% interest)                      LLC                 DE            Communications
      NEON Communications, Inc.                           N/A                 N/A           Communications
      VITTS Network Group, Inc.                           N/A                 N/A           Communications
      Phoenix Foods, LLC                                  N/A                 N/A
      Exelon Capital Partners, Inc.                       Corporation         DE            Investment (in Energy-
                                                                                              Related and
                                                                                              Communications)
        Permits Now (fka                                  N/A                 N/A           Communications
          Softcomp)(approximately 15%
          Interest)
        OmniChoice.com, Inc.                              Corporation         DE            Communications
          (approximately 30% interest)


--------------------------------------------------------------------------------
                                                                        Page 3


Name of Company                                           Organization        State         Type of Business
---------------                                           ------------        -----         ----------------

        Enertech Capital Partners, II
          (approximately 11% interest)                    Corporation         DE            Investment (in Energy-
                                                                                              Related and
                                                                                              Communications
        Everest Broadband Networks                        N/A                 N/A           Communications

     Exelon Infrastructure Services, Inc.                 Corporation         DE            Infrastructure Services
       (approximately 95% interest)
      Exelon Infrastructure Services of                   Corporation         DE            Infrastructure Services
        PA, Inc.
        EIS Engineering, Inc.                             Corporation         DE            Infrastructure Services
          P.A.C.E. Field Services, LLC                    LLC                 DE            Infrastructure Services
          P.A.C.E. Environmental, LLC                     LLC                 DE            Infrastructure Services

      Chowns Communications, Inc.                         Corporation         DE            Infrastructure Services
      Fischbach and Moore Electric, Inc.                  Corporation         DE            Infrastructure Services
      MRM Technical Group, Inc.                           Corporation         DE            Infrastructure Services
        Aconite Corporation                               Corporation         MN            Infrastructure Services
        Gas Distribution Contractors, Inc.                Corporation         MO            Infrastructure Services
        Mid-Atlantic Pipeliners, Inc.                     Corporation         DE            Infrastructure Services
        Mueller Distribution Contractors,                 Corporation         GA            Infrastructure Services
          Inc.
        Mueller Energy Services, Inc.                     Corporation         NY            Infrastructure Services
        Mueller Pipeliners, Inc.                          Corporation         DE            Infrastructure Services
        Mechanical Specialties                            Corporation         WI            Infrastructure Services
          Incorporated
        Rand-Bright Corporation                           Corporation         WI            Infrastructure Services
      Syracuse Merit Electric, Inc.                       Corporation         DE            Infrastructure Services
      NEWCOTRA, Inc.                                      Corporation         DE            Infrastructure Services
        Fischbach and Moore, Incorporated                 Corporation         NY            Infrastructure Services
          Fischbach and Moore Electrical                  Corporation         DE            Infrastructure Services
            Contracting Inc.
          T.H. Green Electric Co., Inc.                   Corporation         NY            Infrastructure Services
      Trinity Industries, Inc.                            Corporation         DE            Infrastructure Services
      OSP Consultants, Inc.                               Corporation         VA            Infrastructure Services
        International Communications                      Corporation         NV            Infrastructure Services
        Services, Inc.
        OSP Inc.                                          Corporation         VA            Infrastructure Services
        OSP Servicios, S.A. de C.V.                       S.A. de C.V.        Mexico        Inactive
        OSP Telecom, Inc.                                 Corporation         DE            Infrastructure Services
        OSP Telecomm de Mexico, S.A. de                   S.A. de C.V.        Mexico        Inactive
          C.V.
        OSP Telcom de Colombia, LTDA                      LTDA                Colombia      Inactive
        OSP Telecommunications, Ltd.                      Limited             Bermuda       Inactive
        RJE Telecom, Inc.                                 Corporation         FL            Infrastructure Services
        Utility Locate & Mapping Services,                Corporation         VA            Infrastructure Services
          Inc.
        Universal Network Services, Inc.                  Corporation         CA            Infrastructure Services
            (49% interest)
      Dashiell Holdings Corp.                             Corporation         DE            Infrastructure Services
        Dashiell Corporation                              Corporation         TX            Infrastructure Services
          Dacon Corporation                               Corporation         TX            Infrastructure Services
      VSI Group Inc.                                      Corporation         DE            Infrastructure Services
        International Vital Solutions                     Corporation         MD            Infrastructure Services
          Group, Inc.
      Michigan Trenching Service, Inc.                    Corporation         MI            Infrastructure Services
      Lyons Equipment, Inc.                               Corporation         MI            Infrastructure Services
      M.J. Electric, Inc.                                 Corporation         DE            Infrastructure Services
      Electric Services,Inc.                              Corporation         DE            Infrastructure Services
      EIS Investments, LLC                                LLC                 DE            Infrastructure Services
        WCB Services, LLC (49% interest)                  LLC                 OK            Infrastructure Services
     Adwin Equipment Company                              Corporation         PA            Energy-related
     Kinetic Ventures Fund I, LLC (22.22% interest),      LLC                 DE            Investment (in Energy-
     and Kinetic Ventures Fund II,                                                            Related and
       LLC (17.64% interest)                                                                  Communications)




--------------------------------------------------------------------------------
                                                                        Page 4






                                    BUSINESS

5.   (a) The general  character of the business done by the  registrant  and its
     subsidiaries,  separated as between the holding  companies,  public utility
     subsidiaries   (as  defined  in  the  Act)  and  the  various   non-utility
     subsidiaries.


     Information  regarding the general  business of Exelon  Ventures and Exelon
     Generation and their  subsidiaries can be found in the following  document:
     Item 1 of the  Annual  Report of  Exelon  on Form  10-K for the year  ended
     December 31, 2000 (File No.  1-16169),  which is  incorporated by reference
     herein.

     (b)  Any  substantial  changes  which  may  have  occurred  in the  general
          character of the business of such companies  during the preceding five
          years.

          Information  regarding any substantial changes which may have occurred
          in the general character of the business of Exelon Ventures and Exelon
          Generation and their subsidiaries  during the preceding five years can
          be found in Exelon's  form 10-K for 2000 and PECO's  10-Ks for each of
          the previous  five years (File No.  1-1401) and Unicom's form 10-K for
          the years 1996-1999  (File No.  1-11375) which were  previously  filed
          with the Commission and are incorporated by reference herein.


                                    PROPERTY

6.   Describe  briefly  the general  character  and  location  of the  principal
     plants,  properties,  and other important  physical units of the registrant
     and its subsidiaries,  showing  separately (a) public utility and (b) other
     properties. If any principal plant or important unit is not held in fee, so
     state and describe how held.

     See Item 2 of the  Annual  Report of Exelon on Form 10-K for the year ended
     December 31, 2000 (File No. 1-16169).


                             INTERSTATE TRANSACTIONS

7.   For each  public  utility  company  in the  holding  company  system of the
     registrant  which is engaged in the  transmission of electric energy or gas
     in  interstate  commerce,  furnish the following  information  for the last
     calendar year:






                                    Electric Energy        Gas
Total Annual Sales                                          KWh           Mcf

Interstate Transactions:

     Name of State

Delivered Out of State



--------------------------------------------------------------------------------
                                                                        Page 5



Received from Out of State

               Exelon  Ventures  and Exelon  Generation  are not  engaged in the
transmission of electric energy or gas in interstate commerce.

                             SECURITIES OUTSTANDING

8.   Submit  the  following  information  concerning  the  registrant  and  each
     subsidiary thereof as of the latest available date:

                                   FUNDED DEBT

     (a)  For each issue or series of funded debt, including funded debt secured
          by liens on property owned, whether or not such debt has been assumed:
          (Do  not  include  here  any  contingent  liabilities  reported  under
          paragraph 8(c).)

             BY PERMISSION OF THE STAFF OF THE COMMISSION, COLUMNS E
                          THROUGH I HAVE BEEN OMITTED.

                              AS OF JANUARY 1, 2001


                                                                               Amount Issued
Name of Obligor               Title of Issue         Amount Authorized         Less Retired
--------------------------------------------------------------------------------------------
                                                                     
UNICOM MECHANICAL           Note, 8.750%                     19,085                 2,371
SERVICES                    Due March 31, 2001

UNICOM MECHANICAL           Note, 8.900%                     19,085                 2,960
SERVICES                    Due April 30, 2001

UNICOM MECHANICAL           Note, 2.900%                     19,410                12,059
SERVICES                    Due October 1, 2002

UNICOM THERMAL              Guaranteed Senior Notes      11,523,000            11,523,000
TECHNOLOGIES                7.680%
                            Due June 30, 2023

UNICOM THERMAL              Guaranteed Senior Notes      28,000,000            28,000,000
TECHNOLOGIES                9.090%
                            Due January 31, 2020

UNICOM THERMAL              UTT National Power            2,098,200             1,145,476
TECHNOLOGIES                Equipment Group
                            Obligation, 8.000%
                            Due April 1, 2015

Exelon Generation           Pollution Control Notes      24,125,000            24,125,000
                            Delaware County
                            Series 1993-A, 4.5935%
                            Due August 1, 2016

Exelon Generation           Pollution Control Notes      23,000,000            23,000,000
                            Salem County
                            Series 1993-A, 3.8774%
                            Due March 1, 2025

Exelon Generation           Pollution Control Notes      82,560,000            82,560,000
                            Montgomery County
                            Series 1994-A, 4.2160%
                            Due June 1, 2029

Exelon Generation           Pollution Control Notes      13,340,000            13,340,000
                            Montgomery County
                            Series 1994-B, 4.3000%
                            Due June 1, 2029

Exelon Generation           Pollution Control Notes      18,440,000            18,440,000
                            York County
                            Series 1993-A, 4.5935%
                            Due August 1, 2016


--------------------------------------------------------------------------------
                                                                        Page 6



Exelon Generation           Pollution Control Notes      34,000,000            34,000,000
                            Montgomery County
                            Series 1996-A, 4.1840%
                            Due March 1, 2034


                                  CAPITAL STOCK

(b)  For each  class of  capital  stock  including  certificates  of  beneficial
     interest give  information in number of shares and in dollar  amounts:  (Do
     not include here any warrants,  options, or other securities reported under
     paragraph 8(d).)

                  BY PERMISSION OF THE STAFF OF THE COMMISSION,
                     COLUMNS G THROUGH J HAVE BEEN OMITTED.


                                     ISSUER            TITLE OF          AMOUNT         AMOUNT        AMOUNT          AMOUNT
                                      NAME              ISSUE          AUTHORIZED      RESERVED     UN-ISSUED         ISSUED
------------------------------------------------------------------------------------------------------------------------------------
Exelon Ventures Company, LLC
----------------------------------------------------
Exelon Generation Company, LLC
                                                                                                     
PECO Energy Power Company                              Com. Stk.         984,000                                       984,000
Susquehanna Power Company                              Com. Stk.       1,500,000                    227,000          1,273,000
The Proprietors of the Susquehanna Canal                                                                 22
Susquehanna Electric Company                           Com. Stk.           1,000                                         1,000
AmerGen Energy Company, LLC
AmerGen Vermont, LLC
Exelon (Fossil) Holdings, Inc.                         Com. Stk.           1,000                        900                100
Sithe Energies, Inc.
Exelon Peaker Development General, LLC
Exelon Peaker Development Limited, LLC
ExTex LaPorte Limited Patrnership
Concomber Ltd

----------------------------------------------------
Exelon Enterprises Company, LLC
Exelon Energy Company                                  Com. Stk.           1,000           -            900                100
Exelon Energy Ohio, Inc.                               Com. Stk.           1,000           -              -              1,000
AllEnergy Gas & Electric Marketing Company, LLC
Texas Ohio Gas, Inc.
Exelon Services, Inc.                                  Com. Stk.           1,000           -            900                100
Systems Engineering and Management Corp.
Unicom Power Holdings Inc.                             Com. Stk.           1,000           -            900                100
Unicom Power Marketing Inc.                            Com. Stk.           1,000           -            900                100
Unicom Healthcare Management Inc.              Class A Com. Stk.           1,000           -              -              1,000
UT Holdings Inc.                                       Com. Stk.           1,000           -            900                100
Northwind Chicago LLC
Unicom Thermal Development Inc.                        Com. Stk.             100           -              -                100
Exelon Thermal Technologies, Inc.                      Com. Stk.             100           -              -                100
Exelon Thermal Technologies Boston, Inc.               Com. Stk.             100           -              -                100
Northwind Boston LLC
Exelon Thermal Technolgoies Houston, Inc.              Com. Stk.             100           -              -                100
Northwind Houston LLC
Northwind Houston LP
Exelon Thermal Technologies North America, Inc.        Com. Stk.           3,000           -          2,990                 10
Northwind Thermal Technologies Canada Inc.             Com. Stk.          10,000           -          9,990                 10
Unicom Thermal Technologies Canada, Inc.               Com. Stk.          10,000           -          9,990                 10
UTT National Power Inc.                                Com. Stk.           1,000           -            900                100
Northwind Midway LLC
UTT Nevada Inc.                                        Com. Stk.             100           -              -                100
Northwind Aladdin LLC
Northwind Las Vegas LLC
UTT Phoenix, Inc.                                      Com. Stk.           1,000           -            900                100
Northwind Arizona Development LLC
Northwind Phoenix LLC
Exelon Communications Holdings, LLC
AT&T Wireless PCS of Philadelphia, LLC
PHT Holdings, LLC
PECO Hyperion Telecommunications
Exelon Communications Company, LLC
Energy Trading Company                                 Com. Stk.           1,000                        900                100
Exelon Enterprises Management, Inc.                    Com. Stk.           1,000                        900                100
UniGridEnergy, LLC
CIC Global, LLC
NEON Communications, Inc.
VITTS Network Group, Inc.
Exelon Capital Partners, Inc.                          Com. Stk.           1,000                        900                100
Permits Now (fka Softcomp)
OmniChoice.com, Inc.
Enertech Capital Partners, II
Everest Broadband Networks
UTECH Climate Challenge Fund, L.P.                             -               -           -              -                  -
Kinetic Ventures I, LLC                                        -               -           -              -                  -



--------------------------------------------------------------------------------
                                                                        Page 7



Kinetic Ventures II, LLC                                       -               -           -              -                  -
Exelon Infrastructure Services, Inc.                   Com. Stk.     150,000,000                119,144,070         30,855,930
Exelon Infrastructure Services of Pennsylvania, Inc.
EIS Engineering, Inc.
P.A.C.E Field Services, LLC
P.A.C.E Environmental, LLC
Chowns Communications, Inc.
Fischbach and Moore Electric, Inc.
MRM Technical Group, Inc.
Aconite Corporation
Gas Distribution Contractors, Inc.
Mid-Atlantic Pipeliners, Inc.
Mueller Distribution Contractors, Inc.
Mueller Energy Services, Inc.
Mueller Pipeliners, Inc.
Mechnical Specialties Incorporated
Rand-Bright Corporation
Syracuse Merit Electric, Inc.
NEWCOTRA, Inc.
Fischbach and Moore, Inc.
Fischbach and Moore Electrical Contracting, Inc.
T.H. Green Electric Co., Inc.
Trinity Industries, Inc.
OSP Consultants, Inc.
International Communications Services, Inc.
OSP, Inc.
OSP Servicios, S.A. de C.V.
OSP Telecom, Inc.
OSP Telcomm de Mexico, S.A. de C.V.
OSP Telcom de Colombia, LTDA
OSP Telecommunications, Ltd.
RJE Telecom, Inc.
Utility Locate & Mapping Services, Inc.
Universal Network Services, Inc.
Dashiell Holdings Corp.
Dashiell Corporation
Dacon Corporation
VSI Group Inc
International Vital Solutions Group, Inc.
Michigan Trenching Service, Inc.
Lyons Equipment, Inc.
M.J. Electric, Inc.
Electric Services, Inc.
EIS Investments, LLC
WCB Services, LLC
Adwin Equipment Company                                Com. Stk.           1,000                                         1,000






--------------------------------------------------------------------------------
                                                                        Page 8



                             CONTINGENT LIABILITIES

(c)  A brief  outline of the nature and amount of each  contingent  liability on
     account of endorsement or other guarantees of any securities.

                             AS OF DECEMBER 31, 2000



            Information regarding contingent  liabilities of Exelon Ventures and
       Exelon Generation can be found in the following documents: Footnote 18 of
       the Annual Report of Exelon on Form 10-K for the year ended  December 31,
       2000 (File No. 1-16169), Footnote 16 of the Annual Report of Commonwealth
       Edison  Company on Form 10-K for the year ended  December  31, 2000 (File
       No. 1-1839),  and Footnote 18 of the Annual Report of PECO Energy Company
       on Form 10-K for the year ended December 31, 2000 (File No. 1-1401).




                                OTHER SECURITIES

(d)    A  statement  of the amount of  warrants,  rights,  or options and of any
       class of  securities  of the  registrant  and  subsidiary  companies  not
       elsewhere  herein  described which is outstanding  and/or  authorized.  A
       brief   description  of  the  provisions   thereof  should  be  included.
       Information  need not be set forth  under this item as to notes,  drafts,
       bills of  exchange  or  bankers'  acceptances  which  mature  within nine
       months.

            There  are no  warrants,  rights,  or  options,  outstanding  and/or
       authorized not elsewhere  herein described for Exelon Ventures and Exelon
       Generation.  As to other  securities of the parent  corporation,  Exelon,
       information with respect to Exelon's 1989 Long Term Incentive Plan is set
       forth in Post  Effective  Amendment  No. 1 (on Form S-8) to Exelon's Form
       S-4 Registration Statement No. 333-37082 (filed November 13, 2000) and in
       Exelon's Form S-8 Registration Statement No. 333-49780.  Information with
       respect to PECO Energy  Company's 1998 Stock Option Plan and its Employee
       Savings Plan is set forth in Post Effective Amendment No. 1 (on Form S-8)
       to Exelon's Form S-4 Registration Statement No. 333-37082 (filed November
       13, 2000).  Information  with respect to PECO Energy  Company's  Deferred
       Compensation  and  Supplemental  Pension Plan,  Management Group Deferred
       Compensation   and   Supplemental   Pension   Plan,   Unfunded   Deferred
       Compensation  Plan for Directors,  and Employee  Savings Plan, as well as
       Unicom  Amended and Restated  Long-Term  Incentive  Plan, the Unicom 1996
       Directors' Fee Plan, the Unicom  Retirement  Plan for Directors,  and the
       Commonwealth  Edison  Retirement Plan for Directors and the  Commonwealth
       Edison Employee Savings and Investment Plan is set forth in Exelon's Form
       S-8 Registration Statement No. 333-49780.


--------------------------------------------------------------------------------
                                                                        Page 9




                        INVESTMENTS IN SYSTEM SECURITIES

9.   Give a tabulation  showing principal amount,  par or stated value, the cost
     to the system company originally acquiring such security, and the number of
     shares or units,  of each security  described  under Item 8 that is held by
     the registrant  and by each  subsidiary  company  thereof as the record (or
     beneficial)  owner,  and the  amount at which the same are  carried  on the
     books of each such owner.  This information  should be given as of the same
     date as the information furnished in Item 8.


                                    As of December 31, 2000





Name of Company                                        Number of Common  % Voting Power    Issuer Book
                                                       Shares Owned                       Value ($000)
----------------------------------------------------------------------------------------------------------
                                                                                   
Exelon Ventures Company, LLC                                               100%
  Exelon Generation Company, LLC                                           100%          4,551,000

     PECO Energy Power Company                            984,000          100%             24,600
      Susquehanna Power Company                         1,273,000          100%             47,047

        The proprietors of the Susquehanna Canal                           100%                N/A
    Susquehanna Electric Company                            1,000          100%             10,000
    AmerGen Energy Company, LLC                                             50%
      AmerGen Venture, LLC                                                 100%
    Exelon (Fossil) Holdings, Inc.                                         100%
      Sithe Energies, Inc.                                                49.90%
    Exelon Peaker Development General, LLC                                 100%                N/A
    Exelon Peaker Development Limited, LLC                                 100%                N/A
      ExTex LaPorte Limited Partnership                                      1% EP Gen         N/A
                                                                            99% EP Lim         N/A

    Concomber Ltd                                                          100%              1,200
  Exelon Enterprises Company, LLC                             100          100%        873,519,290


    Exelon Energy Company                                     100          100%            (21,642)
      Exelon Energy Ohio, Inc.                              1,000          100%             13,942
      AllEnergy Gas & Electric Marketing Company, LLC         N/A          100%             22,850
        Texas Ohio Gas, Inc.                                               100%               (403)
    Exelon Mechanical Services, Inc.                          100          100%             33,548
       Systems Engineering and Management Corporation, Inc    874          100%              7,107
    Unicom Power Holdings, Inc.                               100          100%            (16,017)

    Unicom Power Marketing, Inc.                              100          100%                N/A
    Unicom Healthcare Management, Inc.                      1,110          100%              1,702
    UT Holdings, Inc.                                         100          100%           (142,328)

      Northwind Chicago, LLC                                  N/A          100%             (5,649)
      Unicom Thermal Development, Inc.                        100          100%             (4,685)
      Exelon Thermal Technologies, Inc.                       100          100%            (81,511)
      Exelon Thermal Technologies Boston, Inc.                100          100%             (4,311)
        Northwind Boston, LLC                                 N/A           25%            (11,552)
      Exelon Thermal Technologies Houston, Inc.               100          100%               (766)

        Northwind Houston, LLC                                N/A           25%                128
          Northwind Houston, LP                               N/A           25%             13,635

      Exelon Thermal Technologies North America, Inc.          10          100%             (3,068)
        Northwind Thermal Technologies Canada, Inc.            10          100%             (1,801)

          Unicom Thermal Technologies, Canada Inc.             10          100%             (1,011)
      UTT National Power, Inc.                                100          100%               (546)
        Northwind Midway, LLC                                 N/A          100%                N/A
      UTT Nevada, Inc.                                        100          100%               (177)
        Northwind Aladdin, LLC                                N/A           75%             12,000
        Northwind Las Vegas, LLC                              N/A           50%                349
      UTT Phoenix, Inc.                                       100          100%                N/A
        Northwind Arizona Development, LLC                    N/A           50%                N/A
        Northwind Phoenix, LLC                                N/A           50%                N/A
    Exelon Communications Holdings, LLC                                    100%            439,163
      AT&T Wireless PCS of Philadelphia, LLC                                49%
      PHT Holdings, LLC                                                    100%             56,620
        PECO Hyperion Telecommunications                                    49%
      Exelon Communications Company, LLC                                   100%            149,287
    Energy Trading Company                                                 100%                744

    Exelon Enterprises Management, Inc.                                    100%             95,600
      UniGridEnergy, LLC                                                    50%
      CIC Global, LLC                                                       50%
      NEON Communications, Inc.                                             10%


--------------------------------------------------------------------------------
                                                                        Page 10



      VITTS Network Group, Inc.                                             20%
      Phoenix Foods, LLC                                                     5%
      Exelon Capital Partners, Inc.                                        100%             32,966
        Permits Now (fka Softcomp)                                          16%
        OmniChoice.com, Inc.                                                30%
        Enertech Capital Partners II                                        11%
        Everest Broadband Networks                                          15%
    Exelon Infrastructure Services, Inc.                                  <100%            515,266
      Exelon Infrastructure Services of Pennsylvania, Inc.                 100%              6,938
        EIS Engineering, Inc.                                              100%
          P.A.C.E Field Services, LLC                                      100%              8,135
          P.A.C.E Environmental, LLC                                       100%
      Chowns Communication, Inc.                              N/A          100%             11,893
      Fischbach and Moore Electric, Inc.                      N/A          100%
      MRM Technical Group, Inc.                               N/A          100%            121,556
        Aconite Corporation                                                100%
        Gas Distribution Contractors, Inc.                                 100%
        Mid-Atlantic Pipeliners, Inc.                                      100%
        Mueller Distribution Contractors, Inc.                             100%
        Mueller Energy Services, Inc.                                      100%
        Mueller Pipeliners, Inc.                                           100%
        Mechanical Specialties Incorporated                                100%
        Rand-Bright Corporation                                            100%
      Syracuse Merit Electric, Inc.                           N/A          100%             15,297
      NEWCOTRA, Inc.                                          N/A          100%
        Fischbach and Moore, Inc.                                          100%              7,001
          Fischbach and Moore Electrical Contractors, Inc.                 100%
          T.H. Green Electric Co., Inc.                                    100%
      Trinity industries, Inc.                                N/A          100%             11,322
      OSP Consultants, Inc.                                   N/A          100%             68,116
        International Communications Services, Inc.                        100%
        OSP, Inc.                                                          100%
        OSP Servicios, S.A. de C.V.                                        100%
        OSP Telecom, Inc.                                                  100%
        OSP Telcomm de Mexico, S.A. de C.V.                                100%
        OSP Telcom de Columbia, LTDA                                       1005
        OSP Telecommunications, Ltd.                                       100%
        RJE Telecom, Inc.                                                  100%
        Utilities Locate & Mapping Services, Inc.                          100%
        Universal Network Services, Inc.                                    49%
      Dashiell Holdings Corporation                           N/A          100%             68,215
        Dashiell Corporation                                               100%
          Dacon Corporation                                                100%
      VSI Group, Inc.                                         N/A          100%             19,307
        International Vital Solutions Group, Inc.                          100%
      Michigan Trenching Services, Inc.                       N/A          100%             14,994
      Lyons Equipments, Inc.                                  N/A          100%
      M.J. Electric, Inc.                                                  100%            143,906
      Electric Services, Inc.                                              100%              7,443
      EIS Investments, LLC                                                 100%
        WCB Services, LLC                                                   49%
    Adwin Equipment Company                                   N/A          100%             16,732
    Kinetic Ventures Fund I, LLC                                         22.22%
    Kinetic Ventures Fund II, LLC                                        17.64%



     N/A Not applicable or Not Available

     Issuer book value is subject to a final determination.





--------------------------------------------------------------------------------
                                                                        Page 11


                         INVESTMENTS IN OTHER COMPANIES

10.  Give a  tabulation  showing  all  investment  of the  registrant  and  each
     subsidiary  thereof in holding  companies and in public  utility  companies
     which are not subsidiary companies of the registrant.  Also, show all other
     investments of the registrant and each subsidiary thereof in the securities
     of any other  enterprise,  if the book value of the  investment in any such
     enterprise  exceeds 2% of the total  debit  accounts  shown on the  balance
     sheet of the company  owning  investment  or an amount in excess of $25,000
     (whichever  amount is the lesser).  Give the principal amount and number of
     shares or units and the cost of each issue of such securities to the system
     company  originally  acquiring such  security,  and the amount at which the
     same are  carried  on the  books  of the  owner.  List all such  securities
     pledged as collateral for loans or other obligations and identify loans and
     obligations for which pledged.  This information  should be given as of the
     same date as the information furnished in Item 8.

                             As of December 31, 2000



Investor               Investee             Type               Quantity                 Cost           Carrying Value
----------------------------------------------------------------------------------------------------------------------
                                                                                        
Exelon         Pantellos Corporation        Corporation        N/A                  $4,439,210            $4,439,210
Capital
Partners, Inc.

Exelon         Automated Power Exchange     Competitive Power  1,500,000            $3,000,000            $3,000,000
Capital                                     Exchange Business
Partners, Inc.

Exelon         UTECH Climate Challenge      Venture Capital    N/A                  $4,582,713           $23,847,576
Capital        Fund, L.P.                   Investment
Partners, Inc.

Exelon         Exotrope                     Convertible        N/A                    $500,000              $500,000
Capital                                     Debentures
Partners, Inc.

Exelon         Media Station, Inc.          Preferred plus     214,286              $1,500,000            $1,500,000
Capital                                     Warrants (Common)  48,702
Partners, Inc.

Energy Trading WorldWide Web                Common shares      73,450                 $316,753                $9,181
Company        NetworX Corporation

Energy Trading Entrade                      Common Shares      200,000              $1,489,115              $162,500
Company



--------------------------------------------------------------------------------
                                                                        Page 12



N/A Not applicable


                        INDEBTEDNESS OF SYSTEM COMPANIES

11.  List each  indebtedness  of the registrant and of each  subsidiary  company
     thereof (other than indebtedness  reported under Item 8, but as of the same
     date) where the  aggregate  debt owed by any such company to any one person
     exceeds  $25,000  or an  amount  exceeding  2% of the  total  of the  debit
     accounts shown on the balance sheet of the debtor  (whichever amount is the
     lesser) but not including any case in which such aggregate  indebtedness is
     less than $5,000, and give the following additional  information as to each
     such indebtedness:

(a)  Debts owed to associate companies as of December 31, 2000:



Name of Debtor          Name of Creditor             Amount Owed   Rate of Interest      Date of Maturity
---------------------------------------------------------------------------------------------------------
                                                                            
Exelon                  Exelon Corporation            5,000,000       Variable             Revolver
Enterprises, LLC

Exelon Enterprises,LLC Unicom Investment, Inc.      619,830,398       Variable             Revolver

Unicom Healthcare       Exelon                           50,000       Variable             Revolver
Management, Inc.        Enterprises, LLC

Exelon Energy           Exelon                       41,078,696       Variable             Revolver
Company                 Enterprises, LLC

Exelon Energy           Exelon                      120,072,983       Variable             Revolver
Company                 Enterprises, LLC

Unicom Power            Exelon                       91,000,000       Variable             Revolver
Holdings, Inc.          Enterprises, LLC

Exelon Mechanical       Exelon                       83,328,167       Variable             Revolver
Services, Inc.          Enterprises, LLC

UT Holdings, Inc.       Exelon                      241,870,258       Variable             Revolver
                        Enterprises, LLC

Exelon Thermal          UT Holdings, Inc.           176,708,228       Variable             Revolver
Technologies, Inc.

Exelon Thermal          Edison Finance               17,211,180       7.750%               12/31/08
Technologies, Inc.      Partnership

Unicom Thermal          UT Holdings, Inc.             4,125,468       Variable             Revolver
Development, Inc.

Exelon Thermal          UT Holdings, Inc.             8,296,380       Variable             Revolver
Technologies
Boston, Inc.

Exelon Thermal          UT Holdings, Inc.            12,797,500       Variable             Revolver
Technologies
Houston, Inc.

Unicom Thermal          UT Holdings, Inc.             2,453,441       Variable             Revolver
Technologies
Canada, Inc.

UTT Phoenix, Inc.       UT Holdings, Inc.               644,000       Variable             Revolver


UTT Nevada, Inc.        UT Holdings, Inc.            12,349,628       Variable             Revolver

Northwind Midway, LLC   UT Holdings, Inc.               215,000       Variable             Revolver


--------------------------------------------------------------------------------
                                                                        Page 13




Exelon                  CIC Global, LLC               2,000,000         Prime            12/14/2001
Enterprise
Management

Exelon                  Neon Communications, Inc.    16,635,881          8.00%            4/15/2005
Enterprise
Management

Exelon Infrastructure   Exelon Enterprises           48,422,908         Variable         Revolver
Services

Exelon                  Exelon Enterprise             6,917,056          7.00%           On Demand
Enterprises             Management

Exelon Fossil           Exelon Corporation          696,196,000     7.562% to 7.625%     10/12/2001
Holdings, Inc.

AT&T Wireless PCS       PECO Wireless, LLC          153,419,000     AFR (semi-annual)    On demand
of Philadelphia



N.A. Not Available


(b)  Debts owed to others as of December 31, 2000:

                  BYPERMISSION  OF THE STAFF OF THE  COMMISSION,  "DEBTS OWED TO
                    OTHERS" HAS BEEN OMITTED.


                                PRINCIPAL LEASES

12.  Describe briefly the principal features of each lease (omitting oil and gas
     leases) to which the  registrant  or any  subsidiary  company  thereof is a
     party,  which involves  rental at an annual rate of more than $50,000 or an
     amount exceeding 1% of the annual gross operating  revenue of such party to
     said  lease  during its last  fiscal  year  (whichever  of such sums is the
     lesser) but not including any lease involving rental at a rate of less than
     $5,000 per year.



                                                                                          Total Payments for the
Lessee                     Lessor                              Items Leased               year ended December 2000
---------------------------------------------------------------------------------------------------------------------
                                                                               
Exelon Generation          Chase Manhattan Trust Company       Railcars                      4,671,638

Exelon Generation          CIT Group/Equipment                 Railcars                        546,504
                           Financing Inc.

Exelon Generation          General Electric Railcar            Railcars                      1,449,420
                           Services Corporation (1)

Exelon Generation          Newcourt Capital USA, Inc. (2)      Railcars                      3,439,668

Exelon Generation          Transport Capital Rail              Railcars                        576,000
                           Partners, LLC


Exelon Generation          Duke Realty                         Office Space                  3,184,393

Exelon Generation          Integral Systems                    Office Space                    247,799


Exelon Generation          United Jersey Bank,                 Merrill Creek                14,585,012
                           As Owner Trustee

Exelon Generation          FV Office Partnership,              Office Building               1,333,333
                           Limited Partnership

Exelon Generation          Kennett Development Co. LLC         Office Building               2,241,810

Exelon Generation          BET Investments                     Office Building                  54,299
                                                                                          ------------
                                                               Total                      $311,385,320
                                                                                          ============


Exelon Enterprises         Dover Westchester, LLC              Office Space               $    458,483

Exelon Enterprises         Glenborough Realty Trust, Inc.      Office Building                 801,193


--------------------------------------------------------------------------------
                                                                        Page 14




Exelon Enterprises                    Fox Realty Company       Office Building                 250,000
                                                                                          ------------
                                                               Total                      $  1,509,676
                                                                                          ============


Exelon Mechanical Services, Inc.      Bank of Homewood         Office Space               $     83,129

Exelon Mechanical Services, Inc.      Thomas F. Nelson         Office Space                    116,667

Exelon Mechanical Services, Inc.      KPS Limited Partnership  Office Space                    260,182

Exelon Mechanical Services, Inc.      Suzanne S. Sprowl Trust  Office Space                    763,200

Exelon Mechanical Services, Inc.      William N. Neiheiser     Office Space                     72,500
                                                                                          ------------
                                                               Total                      $  1,295,678
                                                                                          ============


Exelon Energy Company                 PJF Investments          Office Space               $    132,946

Exelon Energy Company                 3 University Office      Office Space                    149,107
                                      Park, Inc.                                          ------------
                                                               Total                      $    282,053
                                                                                          ============


Exelon Thermal Technologies, Inc.     JPS Interests            Land                       $    165,000

Exelon Thermal Technologies, Inc.     Health Care Service Corp Office Space                    757,000

Exelon Thermal Technologies, Inc.     LaSalle National         Office Space                    116,250
                                      Trust N.A.

Exelon Thermal Technologies, Inc.     Scribcor, Inc.           Office Space                    294,000
                                                                                          ------------

                                                               Total                      $  1,332,250
                                                                                          ============

                                                               Grand Total                $315,804,977
                                                                                          ============


(1)  Lease was assigned to NBB North America Co., Ltd. as of June 26, 2000.

(2)  Lease was assigned to National City Leasing Corporation as of September 30,
     1999.




                                 SECURITIES SOLD

13.  If, during the last five years,  the registrant or any  subsidiary  company
     thereof has issued,  sold,  or exchanged  either  publicly or privately any
     securities  having a  principal  amount,  par,  stated  or  declared  value
     exceeding  $1,000,000  or  exceeding  an  amount  equal to 10% of the total
     liabilities  as shown by the balance sheet of issuer at the time such issue
     (whichever of such sums is the lesser), give the following information with
     respect to each such issue or sale:






Issuer            Title of       Amount Issued   Proceeds       Approximate     Name of        Underwriters
                  Issue          or Sold ($000)  Received by    Expenses of     Principal      Initial
                                                 Issuer per     Issuer per      Underwriters   Offering
                                                 $100 (before   $100                           Price
                                                 expenses)
-------------------------------------------------------------------------------------------------------
                                                                           
1998
Unicom Thermal    7.38% Note     $120,000       100%          1.376%        Merrill Lynch,    100%
Technologies                                                                Goldman Sachs

1999
Unicom Thermal    7.680% Note    $11,523        100%          3.237%        ABN Amro          100%
Technologies

2000
Unicom Thermal    9.090% Note    $28,000        100%          2.952%        ABN Amro          100%
Technologies





--------------------------------------------------------------------------------
                                                                        Page 15



                AGREEMENTS FOR FUTURE DISTRIBUTION OF SECURITIES

14(a).   Summarize the terms of any existing  agreement to which the  registrant
         or any  associate or affiliate  company  thereof is a party or in which
         any such  company  has a  beneficial  interest  with  respect to future
         distributions of securities of the registrant or of any subsidiary.

                Certain information  regarding agreements with respect to future
           distributions  of  securities of Exelon and its  subsidiaries  is set
           forth in the following  documents,  the applicable  portions of which
           are hereby incorporated by reference:  Item 1.E,  subsections 1-4 and
           6-7, Item 1.H and Item 1.I of the  Financing  U-1.  Information  with
           respect to  Exelon's  1989 Long Term  Incentive  Plan is set forth in
           Post  Effective  Amendment  No. 1 (on Form S-8) to Exelon's  Form S-4
           Registration Statement No. 333-37082 (filed November 13, 2000) and in
           Exelon's Form S-8 Registration  Statement No. 333-49780.  Information
           with respect to PECO Energy  Company's 1998 Stock Option Plan and its
           Employee Savings Plan is set forth in Post Effective  Amendment No. 1
           (on  Form  S-8) to  Exelon's  Form  S-4  Registration  Statement  No.
           333-37082 (filed November 13, 2000). Information with respect to PECO
           Energy Company's Deferred Compensation and Supplemental Pension Plan,
           Management Group Deferred Compensation and Supplemental Pension Plan,
           Unfunded  Deferred  Compensation  Plan for  Directors,  and  Employee
           Savings  Plan,  as well as  Unicom  Amended  and  Restated  Long-Term
           Incentive  Plan,  the Unicom  1996  Directors'  Fee Plan,  the Unicom
           Retirement Plan for Directors, and the Commonwealth Edison Retirement
           Plan for Directors and the  Commonwealth  Edison Employee Savings and
           Investment  Plan is set  forth  in  Exelon's  Form  S-8  Registration
           Statement No. 333-49780.

14(b).  Describe  briefly the nature of any financial  interest  (other than the
        ownership of securities  acquired as a dealer for the purpose of resale)
        which any person with whom such agreement exists,  has in the registrant
        or in any associate company thereof.

               The beneficiaries of the employee benefit plans referred to above
          may be  deemed  to have a  financial  interest  in the  registrant  or
          affiliated   companies   thereof   by  virtue   of  their   employment
          relationship   with  the  registrant  or  such  other   companies  and
          compensation,   benefit  and  severance  agreements  and  arrangements
          relating to such employment.



                  TWENTY LARGEST HOLDERS OF CAPITAL STOCKS

15.  As of a  recent  date  (indicating  such  date  for  each  class)  give the
     following  information  with  respect to the holders of each class of stock
     and/or certificates of beneficial interest of the registrant:

     (a) The  twenty  largest  registered  holders  of  common  stock of  Exelon
Ventures and Exelon Generation, as of April 23, 2001.




  Title of Issue               Holder of Record and Address      Number of Shares    Percent of Class
                                                                   Owned
---------------------------------------------------------------------------------------------------------
                                                                            
Exelon Generation             Exelon Ventures                        N/A             100% of member-
Membership interest           P.O. Box 805398                                        ship interest
                              Chicago, IL 60680-5398


Exelon Ventures               Exelon Corporation                     N/A             100% of member-
Membership interest           P.O. Box 805398                                        ship interest
                              Chicago, IL 60680-5398


     (b)  Number of  shareholders  of record each holding  1,000 shares or more,
          and aggregate number of shares so held.

       100 % of  Exelon  Generation's  membership  interest  is held  by  Exelon
       Ventures Company. 100% of Exelon Venture's membership interest is held by
       Exelon Corporation.

     (c)  Number of  shareholders of record each holding less than 1,000 shares,
          and aggregate number of shares so held.

          N/A



--------------------------------------------------------------------------------
                                                                        Page 16





                        OFFICERS, DIRECTORS AND EMPLOYEES

16(a).   Positions and  Compensation  of Officers and  Directors.  Give name and
         address of each director and officer (including any person who performs
         similar  functions)  of the  registrant,  of  each  subsidiary  company
         thereof,  and of each mutual  service  company which is a member of the
         same holding company system.  Opposite the name of each such individual
         give the title of every such position held by him and briefly  describe
         each other employment of such individual by each such company.

         State the  present  rate of  compensation  on an annual  basis for each
         director whose aggregate  compensation  from all such companies exceeds
         $1,000 per year, and of each officer whose aggregate  compensation from
         such companies is at the rate of $20,000 or more per year. In the event
         any officer  devotes only part of his time to a company or companies in
         the system this fact should be indicated by appropriate footnote.  Such
         compensation  for such part time  should be  computed on an annual rate
         and if such annual rate exceeds $20,000 the actual compensation as well
         as annual rate should also be reported.

16(b).   Compensation  of Certain  Employees.  As to regular  employees  of such
         companies  who are not  directors or officers of any one of them,  list
         the name,  address,  and aggregate  annual rate of  compensation of all
         those who receive $20,000 or more per year from all such companies.

16(c).   Indebtedness to System Companies. As to every such director, trustee or
         officer as aforesaid,  who is indebted to any one of such companies, or
         on whose behalf any such company has now  outstanding and effective any
         obligation  to assume  or  guarantee  payment  of any  indebtedness  to
         another,  and whose  total  direct  and  contingent  liability  to such
         company  exceeds  the sum of  $1,000,  give the name of such  director,
         trustee, or officer, the name of such company, and describe briefly the
         nature and amount of such direct and contingent obligations.

16(d).   Contracts. If any such director,  trustee, or officer as aforesaid: (1)
         has an  existing  contract  with  any  such  company  (exclusive  of an
         employment  contract which provides for no compensation other than that
         set forth in paragraph (a) of this Item);  or, (2) either  individually
         or together with the members of his immediate family, owns, directly or
         indirectly,  5% or more of the voting  securities  of any third  person
         with whom any such  company has an existing  contract;  or, (3) has any
         other  beneficial  interest in an  existing  contract to which any such
         company is a party;  describe briefly the nature of such contract,  the
         names of the parties  thereto,  the terms thereof,  and the interest of
         such officer, trustee, or director therein.

         By permission of the Staff of the Commission,  information  required to
         be  disclosed  pursuant to Items 16(a)  through  16(d) is not set forth
         herein. In lieu thereof, information in respect thereof is set forth in
         (i) the Proxy  Statement  for 2001 Annual  Meeting of  Shareholders  of
         Exelon (ii) the Annual Report on Form 10-K for the year ending December
         31, 2000 for Exelon,  and such  information is hereby  incorporated  by
         reference.

16(e).   Banking  Connections.  If any such director,  trustee, or officer is an
         executive officer, director,  partner,  appointee, or representative of
         any bank, trust company,  investment banker, or banking  association or
         firm,  or of any  corporation  a  majority  of whose  stock  having the
         unrestricted  right to vote for the election of directors,  is owned by
         any bank, trust company,  investment banker, or banking  association or



--------------------------------------------------------------------------------
                                                                        Page 17



         firm, state the name of such director or officer, describe briefly such
         other  positions  held by him and  indicate  which of the  rules  under
         Section 17(c)  authorizes the  registrant  and subsidiary  companies of
         which he is a director or officer to retain him in such capacity.




            John W.  Rowe:  Member of Board of  Directors  of  Unicom  from 1998
            through the merger  closing;  member of Board of  Directors of ComEd
            from 1998;  member of Board of  Directors of Exelon since the merger
            closing, officer of Exelon Ventures and Exelon Generation and member
            of Board of Directors of Fleet Boston Financial,  commercial banking
            institution. Authorized pursuant to Rule 70(b).






                    INTERESTS OF TRUSTEES IN SYSTEM COMPANIES

17.  Describe  briefly the nature of any substantial  interest which any trustee
     under  indentures  executed in  connection  with any  outstanding  issue of
     securities of the registrant or any subsidiary  thereof,  has in either the
     registrant  or such  subsidiary,  and any claim which any such  trustee may
     have against registrant or any subsidiary; provided, however, that it shall
     not  be  necessary  to  include  in  such   description  any  evidences  of
     indebtedness  owned by such trustee  which were issued  pursuant to such an
     indenture.

            To the knowledge of Exelon Ventures and Exelon Generation,  there is
       no  substantial  interest of any  trustee  under  indentures  executed in
       connection with any outstanding issue of securities.



                   SERVICE, SALES, AND CONSTRUCTION CONTRACTS

18.  As to  each  service,  sales,  or  construction  contract  (as  defined  in
     paragraphs  (19) to (21) of Section  2(a) of the Act) which the  registrant
     and any subsidiary  company thereof has had in effect within the last three
     months,  describe briefly the nature of such contract, the name and address
     of the parties  thereto,  the dates of execution  and  expiration,  and the
     compensation  to be paid  thereunder.  Attach  typical  forms  of any  such
     contracts as an exhibit to this registration  statement. If the other party
     to any such contract is a mutual  service  company or a subsidiary  service
     company  which  is a member  of the  same  holding  company  system  as the
     registrant and as to which the  Commission has made a favorable  finding in
     accordance  with  Rule  13-22,  specific  reference  may  be  made  to  the
     application or declaration filed by such company pursuant to Rule 13-22 and
     no further details need be given as to such contracts.


Note: This item is intended to apply to service, sales or construction contracts
      within  the  scope  of  Section  13.  It is not  intended  to apply to any
      contracts for purchase of power or gas or ordinary contracts for materials
      and supplies, printing, etc., made with non-affiliates.

     Exelon Ventures and Exelon Generation and their subsidiaries may receive or
provide services pursuant to:

     1.   ComEd  provides  services to or receives  services from  affiliates in
          accordance with an Affiliated  Interests Agreement ("AIA") approved by
          the Illinois Commerce  Commission.  The form of the AIA is attached as
          Exhibit H-1. A summary of the service provider, recipient, description
          of the work,  the  annual  dollar  volume,  and  pricing  was filed as
          Exhibit  B-3.3,  Part A, to the Merger U-1; the exhibit was filed with
          Amendment No. 3 to such Form U-1 on October 18, 2000. Included in such
          summary is a description of services provided to certain  governmental
          customers of ComEd by  affiliates  of ComEd  pursuant to  pass-through
          arrangements and the AIA.


--------------------------------------------------------------------------------
                                                                        Page 18




     2.   PECO  provides  services to or receives  services  from  affiliates in
          accordance with a Mutual Services  Agreement  ("MSA")  approved by the
          Pennsylvania  Public  Utilities  Commission.  The  form  of the MSA is
          attached as Exhibit H-2. A summary of the service provider, recipient,
          description  of the work,  the annual dollar  volume,  and pricing was
          filed as Exhibit  B-3.3,  Part A, to the Merger  U-1;  the exhibit was
          filed with Amendment No. 3 to such Form U-1 on October 18, 2000.

     3.   Exelon Business Services Company is the service company subsidiary for
          the Exelon system and provides Exelon,  PECO, ComEd,  Exelon Ventures,
          and Exelon  Generation  with a variety of services.  Such services are
          provided  pursuant  to the terms of the form of the  General  Services
          Agreement, which was filed as Exhibit H-3 to the form U5B registration
          statement for Exelon Corporation filed on January 23, 2001.

     4.   Certain  affiliates  of ComEd and PECO  provide  services  to ComEd or
          PECO, or both,  other than "at-cost",  as discussed in Item 3.C.4.c of
          the Merger U-1. A list and summary of such transactions, contracts and
          arrangements  was filed as Exhibit  B-3.3,  Part B, to the Merger U-1;
          the exhibit was filed with Amendment No. 3 to such Form U-1 on October
          18, 2000. Copies of affiliate  arrangements for Services other than at
          cost were  provided to the Staff in paper form on September  18, 2000.
          Additional copies will be provided on request.  Additional information
          Describing  the business of Exelon  Infrastructure  Services was filed
          confidentially with the Commission as Exhibit N-1 to the Merger U-1.




                                   LITIGATION

19.  Describe briefly any existing litigation of the following descriptions,  to
     which the registrant or any subsidiary  company  thereof is a party,  or of
     which the property of the registrant or any such subsidiary  company is the
     subject,  including  the names of the  parties  and the court in which such
     litigation is pending:

     (1)  Proceedings  to enforce or to restrain  enforcement  of any order of a
          State commission or other governmental agency;

     (2)  Proceedings involving any franchise claimed by any such company;

     (3)  Proceedings  between any such company and any holder,  in his capacity
          as such,  of any funded  indebtedness  or  capital  stock  issued,  or
          guaranteed  by such  company,  or  between  any such  company  and any
          officer thereof;

     (4)  Proceedings in which any such company sues in its capacity as owner of
          capital stock or funded indebtedness issued or guaranteed by any other
          company; and

     (5)  Each other proceeding in which the matter in controversy, exclusive of
          interest  and  costs,  exceeds  an  amount  equal  to 2% of the  debit
          accounts shown on the most recent balance sheet of such company.

                   Information  regarding  litigation  involving Exelon Ventures
              and  Exelon   Generation   and  their   subsidiary   companies  is
              incorporated by reference to Item 3 of the Annual Report of Exelon
              Corporation on Form 10-K for the year ended December 31, 2000(File
              No. 1-16169).




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                                                                        Page 19




                                    EXHIBITS

EXHIBIT A.        Furnish a corporate  chart showing  graphically  relationships
                  existing  between the registrant and all subsidiary  companies
                  thereof as of the same date as the  information  furnished  in
                  the answer to Item 8. The chart should show the  percentage of
                  each class voting  securities of each subsidiary  owned by the
                  registrant and by each subsidiary company.

                           A  Corporate  chart  of  Exelon,   including   Exelon
                           Ventures  and  Exelon  Generation  is being  provided
                           under cover of Form SE as Exhibit A-1.


EXHIBIT B.        With respect to the  registrant  and each  subsidiary  company
                  thereof,   furnish  a  copy  of  the   charter,   articles  of
                  incorporation,  trust agreement,  voting trust  agreement,  or
                  other fundamental document of organization,  and a copy of its
                  bylaws,   rules,   and  regulations,   or  other   instruments
                  corresponding  thereto.  If such  documents  do not set  forth
                  fully the rights,  priorities,  and preferences of the holders
                  of each class of capital stock described in the answer to Item
                  8(b) and those of the  holders  of any  warrants,  options  or
                  other securities  described in the answer to Item 8(d), and of
                  any limitations on such rights, there shall also be included a
                  copy  of  each  certificate,  resolution,  or  other  document
                  establishing  or defining  such rights and  limitations.  Each
                  such  document  shall be in the amended form  effective at the
                  date  of  filing  the  registration   statement  or  shall  be
                  accompanied by copies of any amendments to it then in effect.

                  By permission of the Staff of the  Commission,  in lieu of the
                  exhibits required hereunder,  the disclosure  requirements for
                  Exhibit B have been limited to (i) the state of  incorporation
                  for Exelon  Ventures and Exelon  Generation  and each of their
                  subsidiary  companies;  (ii)  a  brief  description  of  every
                  subsidiary  company of Exelon Ventures and Exelon  Generation;
                  and (iii) a brief  description of every subsidiary  company of
                  Exelon Ventures and Exelon Generation including a statement as
                  to  whether  each such  company  is active or  inactive.  Such
                  information is set forth in Items 4 and 5 hereof.

EXHIBIT C.(a)     With respect to each class of funded debt shown in the answers
                  to Items  8(a) and  8(c),  submit a copy of the  indenture  or
                  other fundamental  document defining the rights of the holders
                  of  such  security,  and a copy  of  each  contract  or  other
                  instrument  evidencing  the  liability of the  registrant or a
                  subsidiary  company  thereof as endorser or  guarantor of such
                  security.  Include a copy of each  amendment of such  document
                  and of each  supplemental  agreement,  executed in  connection
                  therewith.   If  there  have  been  any  changes  of  trustees
                  thereunder,  such changes,  unless otherwise shown,  should be
                  indicated  by  notes  on the  appropriate  documents.  No such
                  indenture or other  document need be filed in connection  with
                  any such issue if the total amount of securities that are now,
                  or  may at any  time  hereafter,  be  issued  and  outstanding
                  thereunder  does not  exceed  either  $1,000,000  or an amount
                  equal to 10% of the total of the debit  accounts  shown on the
                  most recent  balance  sheet of the  registrant  or  subsidiary
                  company which issued or guaranteed such securities or which is
                  the owner of property  subject to the lien of such securities,
                  whichever of said sums is the lesser.


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                                                                        Page 20


              OMITTED BY PERMISSION OF THE STAFF OF THE COMMISSION.



          (b)     As to each  outstanding and uncompleted  contract or agreement
                  entered into by registrant or any subsidiary  company  thereof
                  relating to the acquisition of any securities,  utility assets
                  (as  defined in  section  2(a)(18)  of the Act),  or any other
                  interest in any  business,  submit a copy of such  contract or
                  agreement   and   submit   details   of   any    supplementary
                  understandings or arrangements that will assist in securing an
                  understanding of such transactions.

              OMITTED BY PERMISSION OF THE STAFF OF THE COMMISSION.

EXHIBIT D.        A  consolidating  statement  of  income  and  surplus  of  the
                  registrant  and its  subsidiary  companies for its last fiscal
                  year  ending  prior to the date of  filing  this  registration
                  statement,  together with a consolidating balance sheet of the
                  registrant  and its  subsidiary  companies  as of the close of
                  such fiscal year.


                  Exelon Ventures and Exelon Generation  commenced operations in
                  2001 and  accordingly  have no financial  statements for 2000.
                  The Consolidating Financial Statements for Exelon Ventures and
                  Exelon Generation for 2001 will be filed in the U5S in 2002.


EXHIBIT E.        For each public utility  company and natural gas producing and
                  pipe  line  property  in the  holding  company  system  of the
                  registrant,   furnish  the  following   maps   (properties  of
                  associate  companies  operating in  contiguous or nearby areas
                  may be shown on the same map,  provided  property  and service
                  areas of each company are shown distinctively).

(1)  Map showing service area in which electric service is furnished, indicating
     the names of the companies serving contiguous areas.

(2)  Electric  system map showing  location of electric  property  (exclusive of
     local  distribution  lines)  owned  and/or  operated,  and  information  as
     follows:

     (a)  Generating plants -- kind and capacity;

     (b)  Transmission lines -- voltage,  number of circuits,  kind of supports,
          kind and size of conductors;

     (c)  Transmission substations -- capacity;

     (d)  Distribution substation -- capacity; and

     (e)  Points of  interconnection  with all other electric utility  companies
          and  with  all  electrical   enterprises   operated  by  municipal  or
          governmental agencies, giving names of such companies and enterprises.

(3)  Map showing service area in which gas service is furnished,  indicating the
     names of companies serving contiguous areas; and

(4)  Gas system map showing location of gas property  (exclusive of low pressure
     local  distribution  lines)  owned  and/or  operated,  and  information  as
     follows:

     (a)  Generating plants -- kind and daily capacity;

     (b)  Holders -- kind and capacity;

     (c)  Compressor stations -- capacity in horsepower;

     (d)  Transmission  pipe  lines -- size,  approximate  average  transmission
          pressure and the estimated daily delivery capacity of the system;

     (e)  Points  of  interconnection  with all other  private  and  public  gas
          utilities, pipe lines, or producing enterprises;  giving names of such
          companies and other enterprises; and


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                                                                        Page 21



     (f)  General  location and outline of gas  producing  and reserve areas and
          diagrammatic location of gathering lines.

           The maps  required by this  exhibit were filed under cover of Form SE
           with the U5B for Exelon Corporation on January 23, 2001.

EXHIBIT F.        Furnish an accurate  copy of each  annual  report for the last
                  fiscal  year  ending  prior to the date of the  filing of this
                  registration   statement,   which  the   registrant  and  each
                  subsidiary  company  thereof has  previously  submitted to its
                  stockholders. For companies for which no reports are submitted
                  the reason for omission  should be  indicated;  provided  that
                  electronic  filers  shall  submit such reports in paper format
                  only under cover of Form SE.

                  Exelon  Ventures  and Exelon  Generation  are wholly  owned by
                  Exelon and Exelon Ventures,  respectively,  and accordingly do
                  not submit annual reports to their stockholders.


EXHIBIT G.        Furnish a copy of each annual report that the registrant and
                  each public utility  subsidiary  company  thereof shall have
                  filed  with any  State  Commission  having  jurisdiction  to
                  regulate  public utility  companies for the last fiscal year
                  ending  prior  to  the  date  of  filing  this  registration
                  statement.  If any such  company  shall have  filed  similar
                  reports  with  more  than one  such  State  commission,  the
                  registrant  need  file a copy  of only  one of such  reports
                  provided  that  notation  is made of such  fact,  giving the
                  names of the  different  commissions  with which such report
                  was filed,  and setting  forth any  differences  between the
                  copy   submitted  and  the  copies  filed  with  such  other
                  commissions.  In the event  any  company  submits  an annual
                  report to the Federal  Power  Commission  but not to a State
                  commission,  a copy of such report should be  furnished.  In
                  the case of a registrant  or any public  utility  subsidiary
                  company for which no report is appended the reasons for such
                  omission  should  be  indicated  such  as "No  such  reports
                  required or filed;"  provided that  electronic  filers shall
                  submit such reports in paper format only under cover of Form
                  SE.

                  No such reports required or filed.

EXHIBIT H.        Typical forms of service,  sales, or construction  contracts
                  described in answer to Item 18.

                  1. The forms of the AIA,  MSA and  General  Service  Agreement
                  were filed with form U5B for Exelon Corporation on January 23,
                  2001.

                  2. Copies of Affiliate Arrangements for Services Other than at
                  Cost were provided to the Staff in paper form on September 18,
                  2000.





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                                                                        Page 22




This registration statement is comprised of:

     (a)  Pages numbered 1 to 23 consecutively.

     (b)  The following  Exhibits:  the Exhibits  shown on the attached  exhibit
          index.







                                    SIGNATURE

         Pursuant to the  requirements of the Public Utility Holding Company Act
of 1935, the registrant has caused this registration statement to be duly signed
on its behalf in the City of Chicago  and State of  Illinois  on the 23rd day of
April, 2001.

                                         EXELON CORPORATION

                                         By:  /s/ Randall E. Mehrberg
                                             --------------------
                                         Name:  Randall E. Mehrberg
                                                Title: Senior Vice President and
                                                General Counsel



Attest:

 /s/ Scott N. Peters
-------------------------------------
     Assistant Secretary





                                  VERIFICATION

State of Illinois
County of Cook

The undersigned  being duly sworn deposes and says that he has duly executed the
attached registration statement dated April 23, 2001 for and on behalf of Exelon
Corporation; that he is the Senior Vice President and General
Counsel of such company;  and that all action taken by stockholders,  directors,
and other  bodies  necessary  to  authorize  deponent  to execute  and file such
instrument has been taken.  Deponent  further says that he is familiar with such
instrument  and the contents  thereof,  and that the facts therein set forth are
true to the best of his knowledge, information and belief.

                                                      /s/ Randall E. Mehrberg
                                                      -----------------------



Subscribed and sworn to before me, a notary public
this 23rd day of April, 2001

 /s/ Mary L. Kwilos
------------------
My commission expires  October 26, 2001






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                                                                        Page 23






                                INDEX OF EXHIBITS

EXHIBIT NO.       DESCRIPTION

         A-1        Organization chart for Exelon, including Exelon Ventures and
                    Exelon Generation (filed herewith on Form SE)