EXELON CORP
U5B, 2001-01-18
ELECTRIC & OTHER SERVICES COMBINED
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                       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 Corporation

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

                               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               Exelon Corporation

FERC                 Federal Energy Regulatory Commission

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

PECO                 PECO Energy Company

Unicom               Unicom Corporation










--------------------------------------------------------------------------------
                                                                          Page 1
<PAGE>


                             REGISTRATION STATEMENT

1.  Exact Name of Registrant:  Exelon Corporation

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

3.  Name and address of Chief Accounting Officer:    Ruth Ann Gillis,
    Senior Vice President and Chief Financial Officer, Exelon Corporation,
    10 South Dearborn Street, Chicago, Illinois 60603



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





                         EXELON CORPORATION & SUBSIDIARIES


<TABLE>
<CAPTION>
Name of Company                                                           Organization       State       Type of Business
---------------                                                           ------------       -----       ----------------
<S>                                                                      <C>                <C>         <C>
   Exelon Corporation                                                     Corporation        PA          Holding
     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 Canal                    Corporation        MD          Inactive
     Susquehanna Electric Company                                         Corporation        MD          Utility
     AmerGen Energy Company, LLC (50% interest)                           LLC                DE          Exempt Wholesale Generator
         AmerGen Vermont, LLC                                             LLC                VT          Exempt Wholesale Generator
     Exelon (Fossil) Holdings, Inc.                                       Corporation        DE          Inactive
         Sithe Energies Inc.                                              Corporation        DE          Energy Related
         (49.9% interest)
     Exelon Peaker Development General, LLC                               LLC                DE          Inactive

     Exelon Peaker Development Limited, LLC                               LLC                DE          Inactive

         Entex Laporte L.P.                                               LP                 TX          Exempt Wholesale Generation

     Concomber Ltd.                                                       Corporation        Bermuda     Captive Insurance Company
 Exelon Enterprises Company, LLC                                          LLC                PA          Energy Services

     Exelon Communications Holdings,LLC                                   LLC                PA          Telecommunications
         AT&T Wireless PCS of Philadelphia, LLC                           LLC                DE          Telecommunications
         PHT Holdings LLC
              PECO Hyperion Communications (49% interest held;            LLC                DE          Telecommunications
              PECO holds 1% interest)                                     Partnership        PA          Telecommunications
         Exelon Communications LLC                                        LLC                PA          Telecommunications

     Energy Trading Company                                               Corporation        DE          Investment
     Enterprises Management, Inc.                                         Corporation        PA          Investment
         UniGrid Energy LLC (50% interest)                                LLC                DE          Energy-related


------------------------------------------------------------------------------------------------------------------
                                                                                                            Page 2
<PAGE>

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

         CIC Global, LLC (50% interest)                                   LLC                DE          Telecommunications
         Exelon Capital Partners, Inc.                                    Corporation        DE          Investment (investments in
                                                                                                         Energy-related and
                                                                                                         Telecommunications)

              Extant, Inc. (approximately 12% interest )                  Corporation        DE          Telecommunications
              Permits Now (approximately 14.9% interest)                  Corporation        MD          Telecommunications

              OmniChoice.com, Inc. (approximately 34.88% interest)        Corporation        DE          Telecommunications

        VITTS Network Group, Inc. (approximately 16.8% interest)
                                                                          Corporation        DE          Telecommunications
        NEON Communications (approximately 10% interest)

                                                                          Corporation        DE
     Exelon Infrastructure Services, Inc. (approximately 95% interest)    Corporation        DE          Infrastructure Services
         Exelon Infrastructure Services of PA, Inc.                       Corporation        DE          Infrastructure Services
              EIS Engineering, Inc.
                 P.A.C.E. Field Services, LLC                             Corporation        DE          Infrastructure Services
                 P.A.C.E. Environmental, LLC                              LLC                DE          Infrastructure Services
                                                                          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, Inc.                      Corporation        GA          Infrastructure Services
              Mueller Energy Services, Inc.                               Corporation        NY          Infrastructure Services
              Mueller Pipeliners, Inc.                                    Corporation        DE          Infrastructure Services
              Mechanical Specialties Incorporated                         Corporation        WI          Infrastructure Services
              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  Contracting Inc.        Corporation        DE          Infrastructure Services
                  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 Services, Inc.                 Corporation        NV          Infrastructure Services
              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 C.V.                        S.A. de C.V.       Mexico      Inactive
              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, Inc.                     Corporation        VA          Infrastructure Services
                  Univerisal Network Services, Inc.
                                                                          Corporation        CA          Infrastructure Services
         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 Group, Inc.                   Corporation        MD          Infrastructure Services
         Michigan Trenching Service, Inc.                                 Corporation        MI          Infrastructure Services
         Lyons Equipment, Inc.                                            Corporation        MI          Infrastructure Services
         P.A.C.E.Energineering, Inc.                                      Corporation        OK          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
     Horizon Energy Company                                               Corporation        PA          Inactive (Energy-related)
     Utility Competitive Advantage Fund I, LLC (11.11% interest)          LLC                DE          Investment (Investments in
                                                                                                         Energy-related and
                                                                                                         telecommunications)
     Unicom Energy Services Inc.                                          Corporation        IL          Energy-related
          Unicom Energy Inc.                                              Corporation        DE          Energy-related
               Unicom Energy Ohio, Inc.                                   Corporation        DE          Energy-related
          AllEnergy Gas & Electric Marketing Company, LLC                 LLC                DE          Energy-related
          Systems Engineering and Management Corp.                        Corporation        TN          Energy-related
     Unicom Mechanical Services, Inc.                                     Corporation        IL          Energy Services



--------------------------------------------------------------------------------------------------------------------
                                                                                                              Page 3
<PAGE>
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 (50% interest)                           LLC                DE          Energy systems
           Unicom Thermal Development Inc.                                Corporation        DE          Energy systems
           Unicom Thermal Technologies Inc.                               Corporation        IL          Energy systems
           Unicom Thermal Technologies Boston Inc.                        Corporation        DE          Energy systems
           Northwind Boston LLC (25% interest)                            LLC                MA          Energy systems
           Unicom Thermal Technologies Houston Inc.                       Corporation        DE          Energy systems
                  Northwind Houston LLC (25% interest)                    LLC                DE          Energy systems
                  Northwind Houston LP (25% )                             Limited            DE          Energy systems
                                                                          Partnership
           Unicom Thermal Technologies North America Inc.                 Corporation        DE          Energy systems
                Northwind Thermal Technologies Canada Inc.                Corporation        Canada      Energy systems
                    Unicom Thermal Technologies Inc.                      Corporation        Canada      Energy systems
           UTT National Power Inc.                                        Corporation        IL          Energy systems
                Northwind Midway LLC                                      LLC                DE          Energy systems
           UTT Nevada Inc.                                                Corporation        NE          Energy systems
                Northwind Aladdin LLC (75%        interest)               LLC                NV          Energy systems
                Northwind Las Vegas LLC (50%                  interest)   LLC                NV          Energy systems
           UTT Phoenix, Inc.                                              Corporation        DE          Energy systems
                Northwind Arizona Development    LLC (50% interest)       LLC                DE          Energy systems
                Northwind Phoenix LLC (50%        interest)               LLC                DE          Energy systems
  Commonwealth Edison Company                                             Corporation        IL          Utility
     Commonwealth Edison Company of Indiana                               Corporation        IN          Energy Related
     ComEd Financing I                                                    Trust              DE          Financing
     ComEd Financing II                                                   Trust              DE          Financing
     ComEd Funding, LLC                                                   LLC                DE          Financing
         ComEd Transitional Funding Trust                                 Trust              DE          Financing
     Commonwealth Research Corporation                                    Corporation        IL          Energy Related
     Edison Development Corporation                                       Corporation        DE          Real Estate
     Edison Development Canada, Inc.                                      Corporation        Canada      Development
         Edison Finance Partnership                                       Partnership        Canada      Financing
  Unicom Assurance Company Ltd.                                           Corporation        IL          Insurance
     Spruce Holdings G.P. 2000                                            LLC                DE          Tax Advantaged
     Spruce Holdings L.P. 2000                                            LLC                DE          Tax Advantaged
       Spruce Equity Holdings, L.P.                                       LP                 DE          Tax Advantaged
       Spruce Equity Holdings Trust                                       Statutory          DE          Tax Advantaged
                                                                          Business
       Spruce Equity Holdings L.P.                                        Trust                          Tax Advantaged
       (1% interest held by Spruce G.P. and 99% interest held by
        Spruce L.P.)

-------------------------------------------------------------------------------------------------------------------
                                                                                                             Page 4
<PAGE>
Name of Company                                                           Organization      State        Type of Business
---------------                                                           ------------      -----        ----------------
  Unicom Resources Inc                                                    Corporation        IL          Inactive
  Boston Financial Institutional Tax CreditFund X (approximately          LP                 MA          Tax Advantaged
  11% interest)
  Boston Financial Institutional Tax Credit Fund XIX (approximately       LP                 MA          Tax Advantaged
  14% interest)
  Related Corporate Partners XII, LP                                      LP                 DE          Tax Advantaged
  (approximately 36% interest)
  Boston Financial Institutional Tax Credit Fund XIV (approximately       LP                 MA          Tax Advantaged
  44% interest)
  Boston Financial Institutional Tax Credit Fund XXI (approximately       LP                 MA          Tax Advantaged
  27% interest)
  Related Corporate Partners XIV, LP                                      LP                 DE          Tax Advantaged
  (approximately 16% interest)
    Summit Corporate Tax Credit Fund II                                   LP                 WA          Tax Advantaged
  (approximately 33% interest)
    USA Institutional Tax Credit Fund XXII                                LP                 DE          Tax Advantaged
  (approximately 30% interest)
    UTECH Climate Challenge Fund, LP                                      LP                 DE          Energy Related
  (approximately 24% interest)
    Utility Competitive Advantage Fund I, LLC (approximately 11.1%        LLC                DE          Energy Related or Telecom
    interest)
    Utility Competitive Advantage Fund II, LLC (approximately             LLC                DE          Energy Related or Telecom
    17.64% interest)
  PECO Energy Company                                                     Corporation        PA          Utility
     PECO Energy Capital Corp.                                            Corporation        DE          Financing
         PECO Energy Capital, LP                                          LP                 DE          Financing
         PECO Energy Capital Trust II                                     Trust              DE          Financing
         PECO Energy Capital Trust III                                    Trust              DE          Financing
     PECO Energy Transition Trust                                         Statutory          DE          Financing
                                                                          Business
     PECO Wireless, LLC                                                   LLC                DE          Telecom/Financing

         ATNP Finance Company                                             Corporation        DE          Financing
         PEC Financial Services                                           LLC                PA          Financing

     Eastern Pennsylvania Development Company                             Corporation        PA          Real Estate
         Adwin Realty Company                                             Corporation        PA          Real Estate
              Ambassador II Joint Venture                                 Partnership        PA          Real Estate
              Bradford Associates                                         Partnership        PA          Real Estate
              Franklin Town Towers Associates                             Partnership        PA          Real Estate
              Henderson Ambassador Associates                             Partnership        PA          Real Estate
              Riverwatch Associates                                       Partnership        PA          Real Estate
              Route 724                                                   Partnership        PA          Real Estate
              Sigma Joint Venture                                         Partnership        PA          Real Estate
     East Coast Natural Gas Cooperative LLC                               LLC                DE          Energy Services
</TABLE>


                                    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  and  its
     subsidiaries can be found in the following documents:  Item 1 of the Annual
     Report of Unicom  Corporation  on Form 10-K for the year ended December 31,
     1999 (File No. 1-11375), Item 1 of the Annual Report of PECO Energy Company
     on Form 10-K for the year ended  December 31, 1999 (File No.  1-1401),  and
     Item 1C of the Merger U-1 (File No. 70-9645), each of which is incorporated
     by reference herein.

--------------------------------------------------------------------------------
                                                                          Page 5
<PAGE>

     (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 and its
          subsidiaries  during the preceding five years can be found in Unicom's
          and PECO's  respective 10-Ks for each of the previous five years 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 Unicom Corporation on Form 10-K for
     the year  ended  December  31,  1999 (File No.  1-11375)  and Item 2 of the
     Annual  Report  of PECO  Energy  Company  on Form  10-K for the year  ended
     December 31, 1999 (File No. 1-1401).


                             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

Received from Out of State

               Unicom and PECO have on file with the FERC their  respective 1999
               FERC Form 1 which include information  regarding the transmission
               of electric  energy.  These  reports  also have been  provided as
               Exhibits G-1 and G-2.


               PECO does not own and operate  facilities for the transmission of
               gas in interstate commerce. PECO purchases gas transportation and
               storage  services  for  their  retail  customers  from  regulated
               interstate pipeline suppliers.


                             SECURITIES OUTSTANDING

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

--------------------------------------------------------------------------------
                                                                          Page 6
<PAGE>

                                   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 SEPTEMBER 30, 2000


<TABLE>
<CAPTION>
                                                                             Amount Issued
Name of Obligor             Title of Issue            Amount Authorized       Less Retired
-------------------------------------------------------------------------------------------
<S>                        <C>                          <C>                   <C>
COMED                       First Mortgage Bonds        $200,000,000          $200,000,000
                            Series 85, 7.375%
                            Due September 15, 2002

COMED                       First Mortgage Bonds        100,000,000           100,000,000
                            Series 96, 6.625%
                            Due July 15, 2003

COMED                       First Mortgage Bonds         26,000,000            26,000,000
                            Pollution Control
                            Series 1994A, 5.300%
                            Due January 15, 2004

COMED                       First Mortgage Bonds        225,000,000           225,000,000
                            Series 93, 7.000%
                            Due July 1, 2005

COMED                       First Mortgage Bonds        100,000,000           100,000,000
                            Series 76, 8.250%
                            Due October 1, 2006

------------------------------------------------------------------------------------------
                                                                                    Page 7
<PAGE>


COMED                       First Mortgage Bonds        125,000,000           125,000,000
                            Series 78, 8.375%
                            Due October 15, 2006

COMED                       First Mortgage Bonds        110,000,000           110,000,000
                            Pollution Control
                            Series 1996A, 4.400%
                            Due December 1, 2006

COMED                       First Mortgage Bonds         89,400,000            89,400,000
                            Pollution Control
                            Series 1996B, 4.400%
                            Due December 1, 2006

COMED                       First Mortgage Bonds        140,000,000           140,000,000
                            Series 83, 8.000%
                            Due May 15, 2008

COMED                       First Mortgage Bonds         20,000,000            20,000,000
                            Pollution Control
                            Series 1994B, 5.700%
                            Due January 15, 2009

COMED                       First Mortgage Bonds        100,000,000           100,000,000
                            Pollution Control
                            Series 1991, 7.250%
                            Due June 1, 2011

COMED                       First Mortgage Bonds        220,000,000           220,000,000
                            Series 92, 7.625%
                            Due April 15, 2013

COMED                       First Mortgage Bonds        150,000,000           150,000,000
                            Series 94, 7.500%
                            Due July 1, 2013

COMED                       First Mortgage Bonds         20,000,000            20,000,000
                            Pollution Control
                            Series 1994C, 5.850%
                            Due January 15, 2014

COMED                       First Mortgage Bonds         91,000,000            91,000,000
                            Pollution Control
                            Series 1994D, 6.750%
                            Due March 1, 2015

COMED                       First Mortgage Bonds        260,000,000           250,000,000
                            Series 75, 9.875%
                            Due June 15, 2020

COMED                       First Mortgage Bonds        200,000,000           200,000,000
                            Series 81, 8.625%
                            Due February 1, 2022

COMED                       First Mortgage Bonds        200,000,000           200,000,000
                            Series 84, 8.500%
                            Due July 15, 2022

COMED                       First Mortgage Bonds        200,000,000           200,000,000
                            Series 86, 8.375%
                            Due September 15, 2022

COMED                       First Mortgage Bonds        250,000,000           235,950,000
                            Series 88, 8.375%
                            Due February 15, 2023

COMED                       First Mortgage Bonds        160,000,000           160,000,000
                            Series 91, 8.000%
                            Due April 15, 2023

COMED                       First Mortgage Bonds        150,000,000           150,000,000
                            Series 97, 7.750%
                            Due July 15, 2023

------------------------------------------------------------------------------------------
                                                                                    Page 8
<PAGE>


COMED                       Sinking Fund Debentures      49,000,000             1,000,000
                            2.875%
                            Due April 1, 2001

COMED                       Sinking Fund Debentures      50,000,000             4,925,000
                            3.125%
                            Due October 1, 2004

COMED                       Sinking Fund Debentures      50,000,000             8,000,000
                            3.875%
                            Due January 1, 2008

COMED                       Sinking Fund Debentures      20,000,000             3,568,000
                            4.625%
                            Due January 1, 2009

COMED                       Sinking Fund Debentures      40,000,000             9,181,000
                            4.750%
                            Due December 1, 2011

COMED                       Subordinated Deferrable     206,190,000           206,190,000
                            Interest Notes
                            8.480%
                            Due September 30, 2035

COMED                       Subordinated Deferrable     154,640,000           154,640,000
                            Interest Debentures
                            8.500%
                            Due January 15, 2027

COMED TRANSITIONAL          Transitional Funding        425,032,687           254,541,398
FUNDING TRUST               Trust Notes
                            Class A-2
                            Series 1998, 5.290%
                            Due June 25, 2001

COMED TRANSITIONAL          Transitional Funding        258,860,915           258,860,915
FUNDING TRUST               Trust Notes
                            Class A-3
                            Series 1998, 5.340%
                            Due March 25, 2002

COMED TRANSITIONAL          Transitional Funding        421,139,085           421,139,085
FUNDING TRUST               Trust Notes
                            Class A-4
                            Series 1998, 5.390%
                            Due June 25, 2003

COMED TRANSITIONAL          Transitional Funding        598,510,714           598,510,714
FUNDING TRUST               Trust Notes
                            Class A-5
                            Series 1998, 5.440%
                            Due March 25, 2005

COMED TRANSITIONAL          Transitional Funding        761,498,286           761,498,286
FUNDING TRUST               Trust Notes
                            Class A-6
                            Series 1998, 5.630%
                            Due June 25, 2007

COMED TRANSITIONAL          Transitional Funding        510,000,000           510,000,000
FUNDING TRUST               Trust Notes
                            Class A-7
                            Series 1998, 5.740%
                            Due December 25, 2008

COMED                       Pollution Control            50,000,000            45,500,000
                            Obligation Illinois
                            Industrial Pollution
                            Control Finance Authority
                            5.875%
                            Due May 15, 2007

------------------------------------------------------------------------------------------
                                                                                    Page 9
<PAGE>


COMED                       Pollution Control            50,000,000            50,000,000
                            Obligation
                            Illinois Development
                            Finance Authority
                            Series 1994C, Variable
                            Due March 1, 2009

COMED                       Pollution Control            42,200,000            42,200,000
                            Obligation
                            Illinois Development
                            Finance Authority
                            Series 1994B, Variable
                            Due October 15, 2014

COMED                       Medium Term Notes            25,000,000            25,000,000
                            Series 3N-3037, 9.170%
                            Due October 15, 2002

COMED                       Medium Term Notes             2,000,000             2,000,000
                            Series 3N-3038, 9.170%
                            Due October 15, 2002

COMED                       Medium Term Notes            25,000,000            25,000,000
                            Series 3N-3039, 9.170%
                            Due October 15, 2002

COMED                       Medium Term Notes            23,000,000            23,000,000
                            Series 3N-3040, 9.170%
                            Due October 15, 2002

COMED                       Medium Term Notes            25,000,000            25,000,000
                            Series 3N-3041, 9.170%
                            Due October 15, 2002

COMED                       Medium Term Notes            14,000,000            14,000,000
                            Series 3N-3032, 9.200%
                            Due October 15, 2004

COMED                       Medium Term Notes            14,000,000            14,000,000
                            Series 3N-3033, 9.200%
                            Due October 15, 2004

COMED                       Medium Term Notes            10,000,000            10,000,000
                            Series 3N-3034, 9.200%
                            Due October 15, 2004

COMED                       Medium Term Notes            14,000,000            14,000,000
                            Series 3N-3035, 9.200%
                            Due October 15, 2004

COMED                       Medium Term Notes             4,000,000             4,000,000
                            Series 3N-3036, 9.200%
                            Due October 15, 2004

COMED                       Medium Term Notes           200,000,000           200,000,000
                            7.158%
                            Due September 30, 2002

COMED                       Medium Term Notes           250,000,000           250,000,000
                            7.284%
                            Due September 30, 2003

UNICOM CORPORATION          NDH Capital Corporation      10,000,000             4,211,773
                            Note, 8.310%
                            Due January 1, 2003

UNICOM CORPORATION          NDH Capital Corporation       6,025,200             5,228,268
                            Note, 8.300%
                            Due January 15, 2009

UNICOM CORPORATION          NDH Capital Corporation      10,000,000             5,021,147
                            Note, 8.440%
                            Due January 1, 2004

--------------------------------------------------------------------------------------------
                                                                                     Page 10
<PAGE>


UNICOM CORPORATION          NDH Capital Corporation       7,580,221             6,568,375
                            Note, 8.550%
                            Due January 15, 2009

UNICOM CORPORATION          NDH Capital Corporation       3,632,294             3,632,294
                            Note, 8.650%
                            Due January 15, 2010

UNICOM CORPORATION          Corporate Credit Inc.         6,880,178             6,880,178
                            Note, 8.875%
                            Due January 15, 2010

UNICOM CORPORATION          Corporate Credit Inc.         9,224,623             8,702,844
                            Note, 7.980%
                            Due July 15, 2010

COMED                       Note, 6.400%                235,000,000           235,000,000
                            Due October 15, 2005

COMED                       Note, 7.375%                150,000,000           150,000,000
                            Due January 15, 2004

COMED                       Note, 7.625%                150,000,000           150,000,000
                            Due January 15, 2007

COMED                       Note, 6.950%                225,000,000           225,000,000
                            Due July 15, 2018

UNICOM MECHANICAL           Note, 8.500%                     40,960                 3,414
SERVICES                    Due January 1, 2001

UNICOM MECHANICAL           Note, 8.750%                     19,085                 4,112
SERVICES                    Due March 31, 2001

UNICOM MECHANICAL           Note, 8.900%                     19,085                 4,690
SERVICES                    Due April 30, 2001

UNICOM MECHANICAL           Note, 9.000%                     92,013                82,917
SERVICES                    Due May 15, 2003

UNICOM MECHANICAL           Note, 9.250%                     63,570                60,134
SERVICES                    Due July 15, 2003

UNICOM THERMAL              Edison Finance               16,860,300            17,350,500
TECHNOLOGIES                Partnership
                            Note Payable, 7.750%
                            Due December 31, 2008

UNICOM THERMAL              Guaranteed Senior Notes      11,523,000            11,422,650
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             1,123,456
TECHNOLOGIES                Equipment Group
                            Obligation, 8.000%
                            Due April 1, 2015

COMED                       Commercial Paper          1,200,000,000           277,867,000

UNICOM                      Bank Loan                 1,200,000,000         1,200,000,000

COMED                       Purchase Contract             1,430,000               254,174
                            Obligation, 3.000%
                            Due April 30, 2005

PETT                        Transition Bonds            244,470,272            81,970,272
                            1999 Series A-1, 5.4800%
                            Due March 1, 2001

PETT                        Transition Bonds            275,371,325           275,371,325
                            1999 Series A-2, 5.6300%
                            Due March 1, 2003


------------------------------------------------------------------------------------------------
                                                                                         Page 11
<PAGE>

PETT                        Transition Bonds            667,000,000           667,000,000
                            1999 Series A-3
                            LIBOR + 0.125%
                            Due March 1, 2004

PETT                        Transition Bonds            458,518,647           458,518,647
                            1999 Series A-4, 5.8000%
                            Due March 1, 2005

PETT                        Transition Bonds            464,600,000           464,600,000
                            1999 Series A-5
                            LIBOR + 0.200%
                            Due September 1, 2007

PETT                        Transition Bonds            993,386,331           993,386,331
                            1999 Series A-6, 6.0500%
                            Due March 1, 2007

PETT                        Transition Bonds            896,653,425           896,653,425
                            1999 Series A-7, 6.1300%
                            Due September 1, 2008

PETT                        Transition Bonds            110,000,000           110,000,000
                            2000 Series A-1, 7.1800%
                            Due September 1, 2001

PETT                        Transition Bonds            140,000,000           140,000,000
                            2000 Series A-2, 7.3000%
                            Due September 1, 2002

PETT                        Transition Bonds            398,838,452           398,838,452
                            2000 Series A-3, 7.6250%
                            Due March 1, 2009

PETT                        Transition Bonds            351,161,548           351,161,548
                            2000 Series A-4, 7.6500%
                            Due September 1, 2009

PECO                        First Mortgage Bonds        250,000,000           250,000,000
                            5.625% Series,
                            Due November 1, 2001

PECO                        First Mortgage Bonds         75,000,000            75,000,000
                            6.375% Series,
                            Due August 15, 2005

PECO                        First Mortgage Bonds        200,000,000           200,000,000
                            6.50% Series,
                            Due May 1, 2003

PECO                        First Mortgage Bonds        250,000,000           250,000,000
                            6.625% Series,
                            Due March 1, 2003

PECO                        First Mortgage Bonds        175,000,000           175,000,000
                            7.125% Series,
                            Due September 1, 2002

PECO                        First Mortgage Bonds        100,000,000             5,280,000
                            7.50% Series,
                            Due July 15, 2002

PECO                        First Mortgage Bonds        200,000,000            41,636,000
                            8.00% Series,
                            Due April 1, 2002

PECO                        First Mortgage Bonds         50,000,000            50,000,000
                            Pollution Control
                            Delaware County
                            Series 1988-A, 4.1567%
                            Due December 1, 2012

PECO                        First Mortgage Bonds         50,000,000            50,000,000
                            Pollution Control
                            Delaware County
                            Series 1988-B, 4.1996%
                            Due December 1, 2012

-------------------------------------------------------------------------------------------
                                                                                    Page 12
<PAGE>

PECO                        First Mortgage Bonds         50,000,000            50,000,000
                            Pollution Control
                            Delaware County
                            Series 1988-C, 4.2007%
                            Due December 1, 2012

PECO                        First Mortgage Bonds          4,200,000             4,200,000
                            Pollution Control
                            Salem County
                            Series 1988-A, 4.0738%
                            Due December 1, 2012

PECO                        First Mortgage Bonds         29,540,000            29,530,000
                            Pollution Control
                            Montgomery County
                            Series 1992-A, 6.6250%
                            Due June 1, 2022

PECO                        First Mortgage Bonds        160,560,000            68,795,000
                            Pollution Control
                            Montgomery County
                            Series 1991-B, 6.7000%
                            Due December 1, 2021

PECO                        First Mortgage Bonds         90,000,000            39,235,000
                            Pollution Control
                            Delaware County
                            Series 1991-A, 7.3750%
                            Due April 1, 2021

PECO                        First Mortgage Bonds         27,030,000            13,150,000
                            Pollution Control
                            Montgomery County
                            Series 1991-A, 7.6000%
                            Due April 1, 2021

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

PECO                        Pollution Control Notes      17,240,000            17,240,000
                            Indiana County
                            Series 1997-A, 4.4100%
                            Due June 1, 2027

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

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

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

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

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

PECO                        Pollution Control Notes      50,765,000            50,765,000
                            Delaware County
                            Series 1999-A, 5.2000%
                            Due October 1, 2021


--------------------------------------------------------------------------------------------
                                                                                     Page 13
<PAGE>

PECO                        Pollution Control Notes      91,775,000            91,775,000
                            Montgomery County
                            Series 1999-A, 5.2000%
                            Due October 1, 2030

PECO                        Pollution Control Notes      13,880,000            13,880,000
                            Montgomery County
                            Series 1999-B, 5.3000%
                            Due October 1, 2034

PECO                        Citicorp Notes Payable       38,488,000            38,488,000
                            (under special-agreement
                            accounts receivable)
                            6.6300% Series
                            Due November 14, 2000

PECO                        Siemens Notes Payable        20,625,000            14,498,000
                            Limerick Generating Station
                            Turbo Refit, 7.2500% Series
                            Unit 1 Due June 30, 2003
                            Unit 2 Due June 30, 2004

</TABLE>


                                  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.

<TABLE>
<CAPTION>
                                                                                         AMOUNT          ADDITIONAL
                          NAME OF                                TITLE OF              AUTHORIZED          AMOUNT        AMOUNT
                          ISSUER                                  ISSUE                BY CHARTER         UNISSUED       ISSUED
-----------------------------------------------------------------------------------------------------------------------------------
<S>                                                             <C>                     <C>                <C>          <C>
Exelon Corporation
 Commonwealth Edison Company
      Commonwealth Edison Company of Indiana, Inc.               Com. Stk.              1,500,000          391,916      1,108,084
      ComEd Financing I
      ComEd Financing II
      ComEd Funding, LLC
           ComEd Transitional Funding Trust
      Commonwealth Research Corporation                          Com. Stk.                  1,000              800            200
      Concomber Ltd
      Edison Development Company                                 Com. Stk.                 10,000            9,259            741
      Edison Development Canada Inc.                             Prf. Stk.              Unlimited              n/a          2,600
           Edison Finance Partnership

-----------------------------------------------------------------------------------------------------------------------------------
                                                                                                                            Page 14
<PAGE>

 Unicom Enterprises, Inc.                                        Com. Stk.                    100                -            100
      Unicom Energy Services Inc.                                Com. Stk.                  1,000              900            100
           Unicom Energy Inc.                                    Com. Stk.                  1,000              900            100
                Unicom Energy Ohio, Inc.                         Com. Stk.                  1,000                -          1,000
      Unicom Mechanical Services, Inc.                           Com. Stk.                  1,000              900            100
           Building Automated Systems and Services, Inc.         Com. Stk.                 60,000           59,000          1,000
           Bumler Heating and Specialties, Inc.                  Com. Stk.                 15,000            4,995         10,005
           Metropolitan Mechanical Contractors, Inc.             Class A Com. Stk.        100,000           71,598         28,402
                                                                 Class B Com. Stk.        100,000           69,972         30,028
           Hoekstra Building Automation, Inc.                    Com. Stk.                 10,000            9,900            100
           Access Systems, Inc.                                  Com. Stk.                 10,000            9,900            100
           Buckeye Acquisition Corporation                       Com. Stk.                  1,000              900            100
           Reliance Mechanical Corp.                             Com. Stk.                    500              300            200
      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
                                                                 Class B Com. Stk.            110                -            110
      UT Holdings Inc.                                           Com. Stk.                  1,000              900            100
           Northwind Chicago LLC
           Unicom Thermal Development Inc.                       Com. Stk.                    100                -            100
           Unicom Thermal Technologies Inc.                      Com. Stk.                    100                -            100
           Unicom Thermal Technologies Boston Inc.               Com. Stk.                    100                -            100
                Northwind Boston LLC
           Unicom Thermal Technologies Houston Inc.              Com. Stk.                    100                -            100
                Northwind Houston LLC
                     Northwind Houston LP
           Unicom 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 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
 Unicom Investment Inc.                                          Com. Stk.                  1,000              900            100
      Scherer Holdings 1, LLC
      Scherer Holdings 2, LLC
      Scherer Holdings 3, LLC
      Spruce Holdings G.P. 2000, LLC
      Spruce Holdings L.P. 2000, LLC
      Wansley Holdings 1, LLC
      Wansley Holdings 2, LLC
 Unicom Resources Inc.                                           Com. Stk.                  1,000              900            100
 PECO Energy Company
      PECO Energy Capital Corp.                                  Common Stock               1,000            1,000              -
      PECO Energy Capital, LP
                PECO Energy Capital Trust II
                PECO Energy Capital Trust III
      PECO Energy Transition Trust                                                    N/A              N/A             N/A
      PECO Energy Power Company                                  Common Stock             984,000                -        984,000
           Susquehanna Power Company                             Common Stock           1,500,000          227,000      1,273,000
                The Proprietors of the Susquehanna Canal                              N/A              N/A             N/A
      Susquehanna Electric Company                               Common Stock               1,000                -          1,000
      PECO Wireless, LLC                                                              N/A              N/A             N/A
           AT&T Wireless PCS of Philadelphia, LLC                                     N/A              N/A             N/A
                ATNP Finance Company                                                  N/A              N/A             N/A
                PEC Financial Services, LLC                                           N/A              N/A             N/A
      PECO Hyperion Telecommunications (Partnership)                                  N/A              N/A             N/A
      Eastern Pennsylvania Development Company                   Common Stock               1,000                -          1,000
           Adwin Realty Company                                  Common Stock               1,000                -          1,000
                Ambassador II Joint Venture                                           N/A              N/A             N/A
                Bradford Associates                                                   N/A              N/A             N/A
                Franklin Town Towers Associates                                       N/A              N/A             N/A
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                                                            Page 15
<PAGE>

                Henderson Ambassador Associates                                       N/A              N/A             N/A
                Riverwatch Associates                                                 N/A              N/A             N/A
                Route 724                                                             N/A              N/A             N/A
                Signa Joint Venture                                                   N/A              N/A             N/A
                     Central Sewer Project Development Group Ltd                      N/A              N/A             N/A
           Energy Assets
                Global EPS LC
           Exelon (Fossil) Holdings, Inc.                        Common Stock               1,000              900            100
           Exelon Peaker Development General, LLC                                     N/A              N/A             N/A
           Exelon Peaker Development Limited, LLC                                     N/A              N/A             N/A
      Maxey Flats Site IRP, LLC
      Bridgeport Rental & Oil Services Superfund Site ERT
      Utility Competitive Advantage Fund I, LLC
      Energy Trading Company                                                                1,000              900            100
           WorldWide Web NetworX Corporation
           Entrade, Inc.
      Exelon Ventures Copr.                                                                 1,000              900            100
           UniGridEnergy, LLC
           CIC Global, LLC
           Exelon Capital Partners, Inc.                                                    1,000              900            100
                Extant, Inc.
                Permits Now (fka Softcomp)
                OmniChoice.com, Inc.
                Media Station, Inc.
                Enertech Capital Partners, II
           NEON Communications, Inc.
           VITTS Network Group, Inc.
      Exelon Infrastructure Services, Inc.                       Common Stock         150,000,000      119,144,070     30,855,930
           Exelon Infrastructure Services of Pennsylvania, Inc.
           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.
           Dashiell Holdings Corp.
                Dashiell Corporation
                     Dacon Corporation
           VSI Group Inc
                International Vital Solutions Group, Inc.
           Michigan Trenching Service, Inc.
           Lyons Equipment, Inc.
      Adwin Equipment Company                                                               1,000                -          1,000
      Horizon Energy Company                                                                1,000                -          1,000
      East Coast Natural Gas Cooperative, LLP
 Unicom Assurance Company Ltd.
 UTECH Climate Challenge Fund, L.P.
 Utility Competitive Advantage Fund I, LLC
 Utility Competitive Advantage Fund II, LLC

-----------------------------------------------------------------------------------------------------------------------------------
                                                                                                                            Page 16
</TABLE>
<PAGE>

                             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 SEPTEMBER 30, 2000


            Information regarding contingent  liabilities of Exelon can be found
       in the  following  documents:  Footnote 22 of the Annual Report of Unicom
       Corporation  on Form 10-K for the year ended  December 31, 1999 (File No.
       1-11375),  Footnote 6 of the Annual Report of PECO Energy Company on Form
       10-K  for the year  ended  December  31,  1999  (File  No.  1-1401),  the
       Quarterly Reports on Form 10-Q for Unicom and PECO for the quarters ended
       March 31, 2000 and June 30, 2000, Exhibit 99 of Exelon's Quarterly Report
       on Form 10-Q for the quarter ended September 30, 2000 for Unicom, and the
       Quarterly  Report on Form 10-Q for PECO for the quarter  ended  September
       30,  2000,  and Item  1.E.i.f,  Item  3.c,  and  Items 5.a and 5.b of the
       Financing U-1 (File No. 70-9693).



                                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.

            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.


                        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 September 30, 2000
<TABLE>
<CAPTION>
Name of Company                                      Number of Common   % Voting Power    Issuer Book
                                                     Shares Owned                       Value ($000)
----------------------------------------------------------------------------------------------------------
<S>                                                     <C>                <C>              <C>
Exelon Corporation                                                         Public
  Commonwealth Edison Company                           183,745,893         99%          4,660,386
    Commonwealth Edison Company of Indiana, Inc.        1,108,084          100%             21,000
    ComEd Financing I                                   N/A                100%              6,190
    ComEd Financing II                                  N/A                100%              4,640
    ComEd Funding, LLC                                  N/A                100%             39,052
      ComEd Transitional Funding Trust                  N/A                100%          N/A

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

<PAGE>

    Commonwealth Research Corporation                         200          100%                200
    Concomber Ltd.                                      N/A                100%              1,200
    Edison Development Company                                741          100%             32,220
    Edison Development Canada, Inc.                         2,600          100%             13,385
      Edison Finance Partnership                        N/A                100%              6,977
  Unicom Assurance Company Ltd.                         N/A                100%          N/A
  Unicom Enterprises, Inc.                                    100          100%             10,000
    Unicom Energy Services, Inc.                              100          100%                  1
      Unicom Energy, Inc.                                     100          100%                  1
        Unicom Energy Ohio, Inc.                            1,000          100%             14,784
        All Energy, LLC                                 N/A                100%          N/A
    Systems Engineering and Management Corporation, Inc N/A                100%          N/A
    Unicom Mechanical Services, Inc.                          100          100%                  1
      Building Automated Systems and Services, Inc.         1,000          100%          N/A
      Bumler Heating and Specialties, Inc.                 10,005          100%          N/A
      Metropolitan Mechanical Contractors, Inc.            58,430          100%             21,347
      Hoekstra Building Automation, Inc.                      100          100%              5,145
      Access Systems, Inc.                                    100          100%              5,020
      Buckeye Acquisition Corporation                         100          100%              9,000
      Reliance Mechanical Corp.                               200          100%             79,755
    Unicom Power Holdings, Inc.                               100          100%                  1
    Unicom Power Marketing, Inc.                              100          100%          N/A
    Unicom Healthcare Management, Inc.                      1,110          100%              2,001
    UT Holdings, Inc.                                         100          100%             10,500
      Northwind Chicago, LLC                            N/A                100%              1,083
      Unicom Thermal Development, Inc.                        100          100%               (250)
      Unicom Thermal Technologies, Inc.                       100          100%             44,944
      Unicom Thermal Technologies Boston, Inc.                100          100%                187
        Northwind Boston, LLC                           N/A                 25%             11,230
      Unicom Thermal Technologies Houston, Inc.               100          100%              1,555
      Northwind Houston, LLC                            N/A                 25%                128
        Northwind Houston, LP                           N/A                 25%             13,147
      Unicom Thermal Technologies North America, Inc.          10          100%                  1
        Northwind Thermal Technologies Canada, Inc.            10          100%          N/A
          Unicom Thermal Technologies, Inc.                    10          100%              1,610
      UTT National Power, Inc.                                100          100%          N/A
        Northwind Midway, LLC                           N/A                100%          N/A
      UTT Nevada, Inc.                                        100          100%          N/A
        Northwind Aladdin, LLC                          N/A                 75%             12,000
        Northwind Las Vegas, LLC                        N/A                 50%                350
      UTT Phoenix, Inc.                                       100          100%          N/A
        Northwind Arizona Development, LLC              N/A                 50%          N/A
        Northwind Phoenix, LLC                          N/A                 50%          N/A
  Unicom Investment, Inc.                                     100          100%                  1
    Scherer Holdings 1, LLC                             N/A                100%            203,772
    Scherer Holdings 2, LLC                             N/A                100%            103,924
    Scherer Holdings 3, LLC                             N/A                100%            307,696
    Spruce Holdings G.P. 2000, LLC                      N/A                100%              7,316
    Spruce Holdings L.P. 2000, LLC                      N/A                100%            724,282
      Spruce Equity Holdings, L.P. (1% held by          N/A                100%            724,282
      Spruce G.P. and 99% by Spruce L.P.)
        Spruce Holdings Trust (sole beneficiary is      N/A                100%            731,598
        Spruce Equity Holdings, L.P.)
    Wansley Holdings 1, LLC                             N/A                100%            173,707
    Wansley Holdings 2, LLC                             N/A                100%             88,591
  Unicom Resources, Inc.                                      100          100%                  1
PECO Energy Company                                   174,890,482          100%           1,397,000
  PECO Energy Power Company                               984,000          100%              24,600
  (registrant and owner)
    Susquehanna Power Company                           1,273,000          100%              47,047
    The proprietors of the Susquehanna Canal (1)                           100%
  Susquehanna Electric Company                              1,000          100%              10,000
  Adwin Equipment Company                               N/A
  Eastern Pennsylvania Development Company                  1,000          100%               1,000
    Adwin Realty Company                                    1,000          100%               1,000
  Energy Trading Company                                    1,000          100%          N/A
  Exelon Infrastructure Services                       30,855,930           93%             348,297
    Exelon Infrastrucuture Services of Pa.              N/A                100%
    Chowns Communication, Inc.                          N/A                100%
    Fischbach and Moore Electric, Inc.                  N/A                100%
    MRM Technical Group, Inc.                           N/A                100%
    NEWCOTRA, Inc.                                      N/A                100%
    Syracuse Merit Electric, Inc.                       N/A                100%
    Trinity industries, Inc.                            N/A                100%
    OSP Consultants                                     N/A                100%
    Dashiell Holdings Corporation                       N/A                100%
    VSI Group, Inc.                                     N/A                100%
    Michigan Trenching Services, Inc.                   N/A                100%
    Lyons Equipments, Inc.                              N/A                100%

----------------------------------------------------------------------------------------------------
                                                                                             Page 18
<PAGE>

  Exelon Ventures Corporation                           N/A                100%
    Exelon Capital Partners                             N/A                100%
  Horizon Energy Company                                    1,000          100%             100,000
    East Coast Natural Gas Cooperatives, LLP            N/A                 41.12%
  PECO Wireless, LLC                                    N/A                100%
    AT&T Wireless PCS of Philadelphia, LLC              N/A                 50%
    ATNP Finance Company                                N/A                100%
    PEC Financial Services, LLC                         N/A                100%
  PECO Energy Capital Corporation                           1,000          100%          N/A
    PECO Energy Capital, LP                             N/A                  3%
      PECO Energy Capital Trust II                      N/A                100%
      PECO Energy Capital Trust III                     N/A                100%
  PECO Energy Transition Trust                          N/A                100%          N/A
  PECO Hyperion Telecommunications                      N/A                50%           N/A

(1)      Inactive
     N/A Not applicable or not available
</TABLE>




                         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 September 30, 2000

<TABLE>
<CAPTION>
Investor     Investee                                          Type                      Quantity        Cost         Carrying Value
------------------------------------------------------------------------------------------------------------------------------------
<S>          <C>                                               <C>                        <C>            <C>           <C>
ComEd        Chicago Community Ventures, Inc.                  Common Shares              500            $50,000       $50,000

ComEd        Chicago Equity Fund                               Limited Partnership        N/A            $1,390,514    $1,390,514

ComEd        Dearborn Park Corporation                         Common Shares              10,000         $537,654      $537,654

ComEd        I.L.P. Fund C/O Chicago Capital Fund              Venture Capital Small      N/A            $250,000      $250,000
                                                               Business Fund

ComEd        Illinois Venture Fund (Unibanc Trust)             Venture Capital Fund       N/A            $71,320       $71,320

Unicom       Boston Financial Institutional Tax                Limited Partnership        N/A            $97,960       $87,242
             Credit Fund X, Related Corporate Partners
             IV, L.P.; Boston Financial Institutional
             Tax Credit Fund XIX; Related Corporate
             Partners XII, L.P., Boston Capital Corp.
             XIV, Boston Finanical Institutional Tax
             Credit Fund XXI, Related Corporate
             Partners XIV, L.P., Summit Corporate Tax
             Credit Fund II, USA Institutional Tax
             Credit Fund XXII

--------------------------------------------------------------------------------
                                                                         Page 19
<PAGE>


Unicom       Pantellos Corporation                             Corporation                N/A            $4,439,210    $4,439,210

Unicom       Automated Power Exchange                          Competitive Power          1,500,000      $3,000,000    $3,000,000
                                                               Exchange Business

Unicom       UTECH Climate Challenge Fund, L.P.                Venture Capital            N/A            $4,582,713    $4,582,713
                                                               Investment

Unicom       Utility Competitive Advantage Fund I,             Venture Capital            N/A            $11,300,943   $11,300,943
             LLC and Utility Competitve Advantage              Investment
             Fund II, LLC

PECO         Utility Competitive Advantage                     Venture Capital                           $2,000,000    $6,802,878
             Fund I, LLC                                       Investment                 N/A

PECO         AmerGen Energy Company, LLC                       Limited Liability          N/A            $40,110,000   $100,000,000
                                                               Corporation

Exelon       UniGridEnergy, LLC                                Limited Liability          N/A            $518,055      $0
Ventures                                                       Corporation
Corporation

Exelon       CIC Global, LLC                                   Limited Liability          N/A            $1,000,000    $9,049,962
Capital                                                        Corporation
Partners,
Inc.

Exelon       Softcomp                                          Preferred Securities       1,230,001      $1,330,000    $2,019,641
Capital
Partners,
Inc.

Exelon       OmniChoice.com, Inc.                              Preferred Securities       1,684,920      $10,000,000   $9,020,489
Capital                                                        Series B
Partners,
Inc.

Exelon       Exotrope                                          Convertible Debentures     N/A            $500,000      $524,041
Capital
Partners,
Inc.

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

Exelon       Enertech Capital Partners II                      Limited Partnership        N/A            $1,500,000    $2,226,759
Capital
Partners,
Inc.

Exelon       VITTS Network Group                               Redeemable Convertible     6,012,024      $30,000,000   $35,291,000
Ventures                                                       Preferred
Corp.

Energy       WorldWide Web NetworX Corporation                 Common shares              73,450         $316,753      $29,380
Trading
Company

Energy       Entrade                                           Common Shares              200,000        $1,489,115    $762,500
Trading
Company

Exelon       Neon                                              Common Shares            2,131,143        $4,000,000    $74,323,612
Ventures
Corp.
N/A Not applicable

</TABLE>
                        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 September 30, 2000:

--------------------------------------------------------------------------------
                                                                         Page 20
<PAGE>
<TABLE>
<CAPTION>

Name of Debtor              Name of Creditor          Amount Owed        Rate of Interest     Date of Maturity
-------------------------------------------------------------------------------------------------------------
<S>                        <C>                      <C>                 <C>                  <C>
Unicom Resources, Inc.      Unicom Corporation       $13,644,848         Variable             Revolver

Unicom Resources, Inc.      Unicom Corporation         4,829,000         Variable             Revolver

Unicom                      Unicom Corporation       618,940,600         Variable             Revolver

Enterprises, Inc.

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

Unicom Energy               Unicom                    49,687,000         Variable             Revolver
Services, Inc.              Enterprises, Inc.

Unicom Energy, Inc.         Unicom                    49,200,000         Variable             Revolver
                            Enterprises, Inc.

Unicom Power                Unicom                   130,530,000         Variable             Revolver
Holdings, Inc.              Enterprises, Inc.

Unicom Mechanical           Unicom                    89,224,524         Variable             Revolver
Services, Inc.              Enterprises, Inc.

UT Holdings, Inc.           Unicom                   234,955,258         Variable             Revolver
                            Enterprises, Inc.

Unicom Thermal              UT Holdings, Inc.        174,853,167         Variable             Revolver
Technologies, Inc.

Unicom Thermal              UT Holdings, Inc.          5,254,302         Variable             Revolver
Development, Inc.

UTT Boston, LLC             UT Holdings, Inc.          9,191,880         Variable             Revolver

UTT Houston, LLC            UT Holdings, Inc.         12,817,500         Variable             Revolver

UTT Canada                  UT Holdings, Inc.          1,737,089         Variable             Revolver

UTT National                UT Holdings, Inc.            133,310         Variable             Revolver
Power, Inc.

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

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

PECO Wireless,LLC           PEC Financial          3,491,758,856           9.95%                  N.A.

PECO Wireless,LLC           PEC Financial            952,493,117          12.70%                  N.A.

PEC Financial               ATNP Finance Company   3,481,245,933           9.75%                  N.A.

PEC Financial               ATNP Finance Company     951,752,364          12.50%                  N.A.

Susquehanna Electric Co     PECO Energy Company           60,000           6.00%                  N.A.

PECO Energy Company         PECO Capital Corp.           520,833       Prime + 2pts.              N.A.

PECO Energy Company         PECO Capital Corp.           805,206       Prime + 2pts.              N.A.

PECO Energy Company         PECO Capital, LP          80,526,019          7.375%                  N.A.

PECO Energy Company         PECO Capital, LP          51,562,500           8.00%                  N.A.

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

</TABLE>

N.A. Not Available


(b)  Debts owed to others as of September 30, 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.


--------------------------------------------------------------------------------
                                                                         Page 21
<PAGE>
<TABLE>
<CAPTION>
                                                                                                           Total Payments as of
Lessee                     Lessor                                               Items Leased               September 30, 2000
--------------------------------------------------------------------------------------------------------------------------------
<S>                       <C>                                                  <C>                          <C>
ComEd                     Amdahl Corp.                                          Computer Equipment                 $178,578

ComEd                     Comdisco Inc.                                         Computer Equipment                 $110,141

ComEd                     Forsythe Mcarthur                                     Computer Equipment                 $469,771
                          Associates Inc.

ComEd                     IBM Corporation                                       Computer Equipment               $2,782,296

ComEd                     Somerset Capital Group, Ltd.                          Computer Equipment                 $203,827

ComEd                     Storage Tek Financial                                 Computer Equipment                 $221,602
                          Services Corp

ComEd                     Xerox Corp.                                           Various Equipment                $2,208,028

ComEd                     CommEd Fuel Company, Inc.                             Nuclear Fuel Assemblies        $279,055,444 (1)

ComEd                     Chase Manhattan Trust Company                         Railcars                         $4,671,638

ComEd                     CIT Group/Equipment                                   Railcars                           $409,878
                          Financing Inc.

ComEd                     General Electric Railcar                              Railcars                         $1,087,065
                          Services Corporation (2)

ComEd                     Newcourt Capital USA, Inc. (3)                        Railcars                         $2,579,751

ComEd                     Transport Capital Rail                                Railcars                           $360,000
                          Partners, LLC

ComEd                     AT&T Global Real Estate                               Office Space                     $4,696,641

ComEd                     400 S. Jefferson LLC                                  Office Space                       $541,689

ComEd                     Julian Toft & Downey                                  Office Space                       $346,673

ComEd                     Oxford Bank                                           Office Space                       $198,734

ComEd                     Duke Realty                                           Office Space                     $2,396,740

ComEd                     Integral Systems                                      Office Space                       $186,135

ComEd                     Chicago Public Schools                                Office Space                       $461,352

ComEd                     Jones Lang LaSalle                                    Office Space                     $1,901,221

ComEd                     Loft Development Corporation                          Office Space                       $533,502

ComEd                     East Lake Management Corp.                            Office Space                        $83,639

ComEd                     Lincoln Atrium Management Corp.                       Office Space                     $1,406,297

ComEd                     James Morrison                                        Office Space                        $66,631

ComEd                     Prime Realty Group Trust                              Office Space                     $1,178,637

ComEd                     Alter Group                                           Office Space                       $284,504

ComEd                     Seaway National Bank                                  Office Space                        $93,614

ComEd                     77 W. Wacker Limited Partnership                      Office Space                        $63,002

ComEd                     20 S. Clark Owner's Group                             Office Space                       $106,105

ComEd                     J B Prentice Management                               Office Space                        $57,753

ComEd                     III Industrial Properties, Inc.                       Office Space                       $859,430
                                                                                                               ------------
                                                                                Total                          $309,800,318
                                                                                                               ============

Unicom Enterprises, Inc.   Dover Westchester, LLC                               Office Space                       $343,862
                                                                                                               ------------
                                                                                Total                              $343,862
                                                                                                               ============

Unicom Mechanical
Services, Inc.            Bank of Homewood                                      Office Space                        $56,129

Unicom Mechanical
Services, Inc.            Thomas F. Nelson                                      Office Space                        $72,917

Unicom Mechanical
Services, Inc.            KPS Limited Partnership                               Office Space                       $195,136

Unicom Mechanical
Services, Inc.            Suzanne S. Sprowl Trust                               Office Space                       $572,400
                                                                                                                   --------
                                                                                Total                              $896,582
                                                                                                                   ========

Unicom Energy, Inc.       PJF Investments                                       Office Space                       $108,369
                                                                                                                   --------
                                                                                Total                              $108,369
                                                                                                                   ========

Unicom Thermal
Technologies, Inc.        JPS Interests                                         Land                               $123,750

Unicom Thermal
Technologies, Inc.        Health Care Service Corp                              Office Space                       $567,750

Unicom Thermal
Technologies, Inc.        LaSalle National Trust N.A.                           Office Space                        $87,188

Unicom Thermal
Technologies, Inc.        Scribcor, Inc.                                        Office Space                       $220,500
                                                                                                                   --------
                                                                                Total                              $999,188
                                                                                                                   ========

PECO Energy Company       Verizon                                               Pole Attachments                $ 4,762,500

PECO Energy Company       United Jersey Bank,                                   Merrill Creek                   $10,938,759
                          As Owner Trustee
--------------------------------------------------------------------------------
                                                                         Page 22
<PAGE>


PECO Energy Company       FV Office Partnership,                                Office Building                  $1,333,333
                          Limited Partnership

PECO Energy Company       Glenborough Realty Trust, Inc.                        Office Building                    $600,895

PECO Energy Company       Kennett Development Co. LLC                           Office Building                  $1,494,540

PECO Energy Company       Fox Realty Company                                    Office Building                    $187,495

PECO Energy Company       BET Investments                                       Office Building                     $54,299

PECO Energy Company       Bankers Leasing Corporation                           Capital Items (vehicles,        $19,339,368
                                                                                computers, and equipment)       ===========
                                                                                Total                           $38,711,189
                                                                                                                ===========

                                                                                Grand Total                    $350,859,508
                                                                                                               ============
</TABLE>

(1)  ComEd's regular lease payments covered the amortization of the nuclear fuel
     used in ComEd's reactors plus the lessor's related financing costs. On July
     31, 2000,  ComEd  terminated  its nuclear fuel lease  arrangement.  ComEd's
     termination  payment to the lessor amounted to  approximately  $240 million
     and covered the value of the unused leased nuclear fuel in ComEd's reactors
     plus the lessor's related financing costs.


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


(3)  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:

<TABLE>
<CAPTION>
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)
-----------------------------------------------------------------------------------------------------------------------------
<S>                 <C>                 <C>                 <C>            <C>            <C>                 <C>
1996
Unicom              Common Shares       $13,471             $19.28         .035%          N/A                 N/A

ComEd               Pollution           $110,000            98.171%        .341%          J.P. Morgan         100%
                    Control First                                                         Securities
                    Mortage Bonds                                                         Inc.

                                                                                          First Chicago
                                                                                          Capital
                                                                                          Markets Inc.

ComEd               Pollution           $89,400             98.171%        .364%          J.P. Morgan         100%
                    Control First                                                         Securities
                    Mortage Bonds                                                         Inc.

                                                                                          First Chicago
                                                                                          Capital
                                                                                          Markets, Inc.

PECO Energy         Pollution           $34,000             100%           N.A.           Lehman              100%
                    Control Revenue                                                       Brothers
                    Refunding Bonds

1997
ComEd               7.375% Notes        $150,000            99.184%        .89%           Salomon             99.809%
                                                                                          Brothers Inc.

                                                                                          Merrill Lynch
                                                                                          & Co.

                                                                                          Paine Webber
                                                                                          Incorporated

ComEd               7.625% Notes        $150,000            99.258%        .92%           Salomon             99.908%
                                                                                          Brothers Inc.

---------------------------------------------------------------------------------------------------------------------
                                                                                                              Page 23

<PAGE>

                                                                                          Merrill Lynch
                                                                                          & Co.

                                                                                          Paine Webber
                                                                                          Incorporated

ComEd               Capital             $154,640            100%           .30%           Salomon             100%
Financing II        Securities                                                            Brothers Inc.

                                                                                          Merrill Lynch
                                                                                          & Co.

                                                                                          Paine Webber
                                                                                          Incorporated

Unicom              Common Shares       $13,302             $18.87         .03%           N/A                 N/A

PECO Energy         Pollution           $17,240             100%           N/A            Goldman Sachs       N/A
                    Control Revenue                                                       & Company
                    Refunding Bonds

PECO Energy         Company             $50,000             100%           .788%          Smith Barney        100%
                    Obligated                                                             Inc.
                    Mandatorily
                    Redeemable                                                            Lehman
                    Preferred                                                             Brothers
                    Securities

1998
Unicom              Common Shares       $23,419             $38.14         N/A            N/A                 N/A

ComEd               6.95% Notes         $225,000            98.697%        1.11%          PaineWebber         99.572%
                                                                                          Inc.

                                                                                          Lehman
                                                                                          Brothers Inc.

                                                                                          ABN AMRO Inc.

                                                                                          The Bank of New
                                                                                          York

                                                                                          J.P. Morgan
                                                                                          Securities, Inc.

                                                                                          Artemis Capital
                                                                                          Group,

                                                                                          Blaylock &
                                                                                          Partners, L.P.

ComEd               Transitional        $3,400,000          99.489%        .64%           Goldman,                 99.959%
Transitional        Funding Trust                                                         Sachs & Co.,
Funding Trust       Notes

                                                                                          Merrill Lynch

                                                                                          Pierce, Fenner
                                                                                          & Smith Inc.

                                                                                          Salomon Smith
                                                                                          Barney Inc.

Unicom Thermal      7.38% Note          $120,000            100%           1.376%         Merrill Lynch,           100%
Technologies
                                                                                          Goldman Sachs

PECO Energy         Company             $78,100             100%           1%             Salomon                  100%
                    Obligated                                                             Smith Barney
                    Mandatorily
                    Redeemable                                                            Merrill Lynch
                    Preferred                                                             & Co.
                    Securities

1999
Unicom              Common Shares       $21,441             $39.23         N/A            N/A                      N/A

Unicom              8.300% Note         $6,025              100%           N/A            N/A                      N/A

Unicom              8.550% Note         $7,580              100%           N/A            N/A                      N/A

Unicom              8.875% Note         $6,880              100%           N/A            N/A                      N/A

Unicom              7.980% Note         $9,225              100%           N/A            N/A                      N/A

Unicom Thermal      7.680% Note         $11,523             100%           3.237%         ABN Amro                 100%
Technologies
------------------------------------------------------------------------------------------------------------------------
                                                                                                                 Page 24
<PAGE>

PECO Energy         Transition          A-1
                    Bonds               $244,470            99.977%        .35%           Salomon                  100%
                                                                                          Smith Barney
                                        A-2
                                        $275,371            99.928%        .40%           Goldman,
                                                                                          Sachs & Co.
                                        A-3
                                        $667,000            99.836%        .45%           Lehman
                                                                                          Brothers
                                        A-4
                                        $455,519            99.868%        .45%           First Chicago
                                                                                          Capital
                                                                                          Markets, Inc.
                                        A-5
                                        $464,600            99.839%        .50%           First Union
                                                                                          Capital
                                                                                          Markets Corp.
                                        A-6
                                        $993,386            99.871%        .50%           Commerce
                                                                                          Capital
                                                                                          Markets Corp.
                                        A-7
                                        $896,653            99.835%        .50%           Janney
                                                                                          Montgomery
                                                                                          Scott, Inc.

                                                                                          Pryor
                                                                                          McClendon
                                                                                          Counts &
                                                                                          Co., Inc.

2000
Unicom            Common Shares         $31,013             $24.69         N/A            N/A                      N/A

ComEd             Medium Term           $200,000            99.750%        .25%           Lehman                   100%
                  Notes                                                                   Brothers

                                                                                          Banc
                                                                                          of America
                                                                                          Securities, LLC

                                                                                          Banc One
                                                                                          Capital Markets,
                                                                                          Inc.

                                                                                          Chase
                                                                                          Securities, Inc.

                                                                                          ABN Amro,

                                                                                          BNY Capital
                                                                                          Markets, Inc.

                                                                                          Loop Capital
                                                                                          Markets, LLC

ComEd             Medium Term           $250,000            99.650%        .35%           Lehman                   100%
                  Notes                                                                   Brothers

                                                                                          Banc
                                                                                          of America
                                                                                          Securities, LLC

                                                                                          Banc One
                                                                                          Capital Markets,
                                                                                          Inc.

                                                                                          Chase
                                                                                          Securities, Inc.

                                                                                          ABN Amro,

                                                                                          BNY Capital
                                                                                          Markets, Inc.

                                                                                          Loop Capital
                                                                                          Markets, LLC

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

Unicom            8.650% Note           $3,632              100%           N/A            N/A                      N/A

PECO Energy       Transition            A-1
                                        $110,000            99.99%         .20%           Salomon                  100%
                                                                                          Smith Barney
                                        A-2
                                        $140,000            99.90%         .30%           Goldman,
                                                                                          Sachs & Co.
------------------------------------------------------------------------------------------------------------------------
                                                                                                                 Page 25
<PAGE>
                                        A-3
                                        $398,838            99.751%        .50%           Banc One
                                                                                          Capital
                                                                                          Markets, Inc.
                                        A-4
                                        $352,161            99.772%        .50%           Banc of
                                                                                          America
                                                                                          Securities, LLC

                                                                                          Credit Suisse
                                                                                          First Boston

                                                                                          First Union
                                                                                          Securities, Inc.

                                                                                          Barclays
                                                                                          Capital

                                                                                          BNY Capital
                                                                                          Markets, Inc.

                                                                                          Mellon
                                                                                          Financial
                                                                                          Markets, LLC

                                                                                          Prudential
                                                                                          Securities

                                                                                          Janney
                                                                                          Montgomery
                                                                                          Scott, LLC

                                                                                          Pryor, Counts
                                                                                          & Co. Inc.

                                                                                          TD Securities
</TABLE>


                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.

--------------------------------------------------------------------------------
                                                                         Page 26

<PAGE>

                  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, as of
          January 16, 2001.


<TABLE>
<CAPTION>
  Title of Issue              Holder of Record and Address      Number of Shares    Percent of Class
                                                                    Owned
-------------------------------------------------------------------------------------------------------
<S>                           <C>                              <C>
Exelon Common Stock           CEDE & Co.                         242,860,551              76.06%
                              P. O. Box 20
                              Bowling Green Station
                              New York, NY 10274

Exelon Common Stock           Stanley & Co.                       43,506,618              13.63%
                              P. O. Box 2598
                              Jersey City, NJ 07303

Exelon Common Stock           First Chicago Trust Co.              4,318,008               1.35%
                              As Exchange Agent For
                              Unicom UNEX02 & Co.
                              T&E Control Group
                              P. O. Box 2565
                              Jersey City, NJ 07303

Exelon Common Stock           Unicom Stock Deferral Plan             454,802                .14%
                              James Bugaski
                              The Northern Trust Co.
                              50 S. LaSalle St. Fl 8-11
                              Chicago, IL 60675

Exelon Common Stock           SPP & Co.                              260,229                .08%
                              P. O.Box 2598
                              Jersey City, NJ 07303

Exelon Common Stock           Vol & Co.                              192,677                .06%
                              P. O. Box 2598
                              Jersey City, NJ 07303

Exelon Common Stock           MSSTC & Co.                            126,831                .04%
                              P. O. Box 2596
                              Jersey City, NJ 07303

Exelon Common Stock           Unicom Stock Deferral Plan             125,194                .04%
                              James Bugaski
                              The Northern Trust Co.
                              50 S. LaSalle St. Fl 8-11
                              Chicago, IL 60675

Exelon Common Stock           Hart Securities Ltd                    110,000                .03%
                              Anthony Bonanno
                              Gibson Dunn & Crutcher
                              1050 Connecticut Ave. NW 900
                              Washington, DC 20036

Exelon Common Stock           Biagio Demento &                        96,582                .03%
                              Cosima Demento JT TEN
                              829 Paddock Dr.
                              Newtown Square, PA 19073

Exelon Common Stock           Seymore Graff                           45,053                .01%
                              1923 N. 15th St.
                              Reading, PA 19604

Exelon Common Stock           Edward A. Cox, Jr.                      43,750                .01%
                              119 Indian Trail Rd.
                              Oak Brook, IL 60521

Exelon Common Stock           Ora S. Stopyra TTEE U A DTD             41,229                .01%
                              Revocable Living Trust
                              15043 Endicott St.
                              Philadelphia, PA 19116

--------------------------------------------------------------------------------
                                                                         Page 27

<PAGE>

Exelon Common Stock           Clarence B. Bowman &                    40,928                .01%
                              Regena M. Bowman JT TEN
                              68 Brennan Dr.
                              Bryn Mawr, PA 19010

Exelon Common Stock           Henry Tiger                             40,584                .01%
                              4316 N. Lawrence St.
                              Philadelphia, PA 19140

Exelon Common Stock           CEDE & Co.                              38,363                .01%
                              C/O Depository Trust Co.
                              P. O. Box 20
                              Bowling Green Station
                              New York, NY 10274

Exelon Common Stock           Thomas J. Sweeney                       34,508                .01%
                              5345 Bowmanville
                              Chicago, IL 60625

Exelon Common Stock           Herman F. Strouse &                     31,458                .01%
                              Dorothy M. Strouse JT TEN
                              Apt. 515
                              824 Lisburn Rd.
                              Camphill, PA 17011

Exelon Common Stock           Isadore E. Schultz                      28,840                .01%
                              1252 Passmore St.
                              Philadelphia, PA 39111

Exelon Common Stock           James J. O'Connor                       28,594                .01%
                              1500 Lake Shore Dr.
                              Apt. 5C
                              Chicago, IL 60610
</TABLE>


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

          As of January  16,  2001,  there were  16,677  shareholders  of record
          holding 1,000 shares or more, for a total of 283,554,827 shares.

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

          As of January 16,  2001,  there were  184,468  shareholders  of record
          holding less than 1,000 shares, for a total of 35,673,149 shares.




                        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.

--------------------------------------------------------------------------------
                                                                         Page 28

<PAGE>

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 Joint Proxy  Statement/Prospectus  for 2000 Annual  Meetings of
         Shareholders  and  Prospectus  of Unicom  Corporation  and PECO  Energy
         Company,  (ii) the  Annual  Report  on Form  10-K  for the year  ending
         December 31, 1999 for Unicom  Corporation,  and (iii) the Annual Report
         on Form 10-K for the year  ending  December  31,  1999 for PECO  Energy
         Company, 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
         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.


         1. Edward A. Brennan:  Member of Board of Directors of Unicom and ComEd
            from 1995 through the merger  closing;  member of Board of Directors
            of Exelon since the merger closing, and member of Board of Directors
            of Morgan Stanley Dean Witter & Co.,  investment banker.  Authorized
            pursuant to Rule 70(b).

         2. Carlos H. Cantu:  Member of Board of  Directors  of Unicom and ComEd
            from 1998 through the merger  closing;  member of Board of Directors
            of Exelon since the merger closing, and member of Board of Directors
            of  First  Tennessee   National   Corporation,   commercial  banking
            institution. Authorized pursuant to Rule 70(b).

         3. Edgar D. Jannotta:  Member of Board of Directors of Unicom and ComEd
            from 1994 through the merger  closing;  member of Board of Directors
            of Exelon since the merger  closing,  and Senior Director of William
            Blair & Co., L.L.C.,  investment banker. Authorized pursuant to Rule
            70(b).

--------------------------------------------------------------------------------
                                                                         Page 29

<PAGE>

         4. John W.  Rogers:  Member of Board of  Directors  of Unicom and ComEd
            from 1999 through the merger  closing;  member of Board of Directors
            of Exelon since the merger closing, and member of Board of Directors
            of Bank One Corporation,  commercial banking institution. Authorized
            pursuant to Rule 70(a).

         5. John W. Rowe:  Member of Board of Directors of Unicom and ComEd from
            1998  through the merger  closing;  member of Board of  Directors of
            Exelon since the merger closing, 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,  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.

     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 30

<PAGE>

     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 Generation
          Company, LLC and non-utility  subsidiaries with a variety of services.
          Such  services are  provided  pursuant to the terms of the form of the
          General  Services  Agreement,  which is attached as Exhibit H-3.

     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  and  its
          subsidiary  companies is  incorporated  by reference to the  following
          documents:  Item 3 of the Annual Report of Unicom  Corporation on Form
          10-K for the year ended December 31, 1999 (File No.  1-11375),  Item 3
          of the Annual Report of PECO Energy  Company on Form 10-K for the year
          ended December 31, 1999 (File No.  1-1401),  the Quarterly  Reports on
          Form 10-Q for Unicom and PECO for the  quarters  ended  March 31, 2000
          and June 30,  2000,  Item 1 of the  Quarterly  Report on Form 10-Q for
          ComEd for the quarter  ended  September 30, 2000 and Footnote 7 of the
          Quarterly  Report on Form 10-Q for PECO Energy Company for the quarter
          ended September 30, 2000.


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                                                                         Page 31
<PAGE>

                                    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.

                  Corporate  charts of PECO and Unicom are being  provided under
                  cover of Form SE as Exhibits A-1 and A-2.


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 and each of its subsidiary companies;
                  (ii) a  brief  description  of  every  subsidiary  company  of
                  Exelon;  and  (iii) a brief  description  of every  subsidiary
                  company of Exelon  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.

              OMITTED BY PERMISSION OF THE STAFF OF THE COMMISSION.

--------------------------------------------------------------------------------
                                                                         Page 32

<PAGE>

          (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.

                  The Pro Forma Financial  Statements for Exelon  Corporation as
                  filed in the Form 8-K/A  dated on October  20,  2000 (File No.
                  1-16169) and filed on November  15,2000 are attached  herewith
                  as Exhibit D-1.

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

          The maps  required by this exhibit are being filed under cover of Form
          SE.

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                                                                         Page 33

<PAGE>

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.

                  Unicom's 1999 Annual Report to Shareholders  has been provided
                  as  Exhibit   F-1  hereto.   PECO's  1999  Annual   Report  to
                  Shareholders has been provided as Exhibit F-2 hereto. Unicom's
                  Annual  Report on Form 10-K for the year  ended  December  31,
                  1999 (File No.  1-11375) and PECO's Annual Report on Form 10-K
                  for the year ended  December 31, 1999 (File No.  1-1401),  are
                  each incorporated by reference herein.

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.

                  1.   1999  Annual  Report of Unicom on FERC Form 1 to the FERC
                       (filed herewith as Exhibit G-1 on Form SE).

                  2.   1999  Annual  Report of PECO Energy on FERC Form 1 to the
                       FERC (filed herewith as Exhibit G-2 on Form SE).

                  3.   1999 Annual  Report of  Susquehanna  Electric  Company on
                       FERC Form 1 to the FERC (filed herewith as Exhibit G-3 on
                       Form SE).

                  4.   1999 Annual  Report of ComEd of Indiana on FERC Form 1 to
                       the FERC (filed herewith as Exhibit G-4 on Form SE).

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

                  1.   The form of the A1A is filed herewith as Exhibit H-1.

                  2.   The form of the MSA is filed herewith as Exhibit H-2.

                  3.   The  form of the  General  Services  Agreement  is  filed
                       herewith as Exhibit H-3.

                  4.   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 34
<PAGE>

This registration statement is comprised of:

     (a)  Pages numbered 1 to 90 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 18th day of
January, 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  January  18, 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 18th day of January, 2001

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

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                                                                         Page 35
<PAGE>

                                INDEX OF EXHIBITS

EXHIBIT NO.         DESCRIPTION

         A-1        Corporate chart of PECO (filed herewith on Form SE).

         A-2        Corporate chart of Unicom (filed herewith on Form SE).

         D-1        Pro Forma Financial Statements of Exelon Corporation as
                    filed in the Form 8-K Amendment on October 20, 2000.

         E-1        Map of Gas Territory Served by PECO Energy Company (filed
                    herewith on Form SE).

         E-2        Map of Electric Territory Served by PECO Energy Company
                    (filed herewith on Form SE).

         E-3        Map of ComEd Territory Boundary (filed herewith on Form SE).

         E-4        Map of ComEd Overhead Transmission Lines (filed herewith on
                    Form SE).

         E-5        Map of PECO Energy Company Transmission System (filed
                    herewith on Form SE).

         F-1        Unicom's 1999 Annual Report to Shareholders (filed herewith
                    on Form SE).

         F-2        PECO's 1999 Annual Report to Shareholders (filed herewith on
                    Form SE).

         G-1        1999 Annual Report of Unicom to the FERC (FERC Form 1)
                    (filed herewith on Form SE).

         G-2        1999 Annual Report of PECO Energy to the FERC (FERC Form 1)
                    (filed herewith on Form SE).

         G-3        1999 Annual Report of Susquehanna Electric Company to the
                    FERC (FERC Form 1) (Filed herewith on Form SE).

         G-4        1999  Annual  Report of ComEd of  Indiana  to the FERC (FERC
                    Form 1) (Filed herewith on Form SE).

         H-1        ComEd Affiliated Interest Agreement

         H-2        PECO Mutual Services Agreement

         H-3        Exelon General Services Agreement

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