Date of Filing: January 23, 2001 File No.: 1-16169 - ------------------------------------------------------------------------------- Form U-5A NOTIFICATION OF REGISTRATION Filed under Section 5(a) of the Public Utility Holding Company Act of 1935 Exelon Generation Company, LLC Name of Registrant The undersigned holding company hereby notifies the Securities and Exchange Commission that it registers under and pursuant to the provisions of Section 5(a) of the Public Utility Holding Company Act of 1935 and furnishes the following information as to the registrant and subsidiary companies thereof: (1) Exact name of registrant: Exelon Generation Company, LLC (2) Address of principal executive offices: 300 Exelon Way, Kennett Square, PA 19348 (3) Name and address of officer to whom notices and communications should be addressed: Edward J. Cullen, Jr. Vice President and General Counsel Exelon Generation Company, LLC 300 Exelon Way Kennett Square, PA 19348 With a copy to: Randall E. Mehrberg Senior Vice President and General Counsel Exelon Corporation 10 South Dearborn Street, 37th Floor Chicago, Illinois 60603 (4) Certain information regarding the registrant and each subsidiary company thereof (indented to reflect parent-subsidiary relationships): Exelon Generation Company & Subsidiaries Type of Name of Company Organization State Business - --------------- ------------ ----- -------- 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 Investment Sithe Energies Inc. (49.9% interest) Corporation DE Energy-related CH-1140993

Type of Name of Company Organization State Business - --------------- ------------ ----- -------- Exelon Peaker Development General, LLC LLC DE Investment Exelon Peaker Development Limited, LLC LLC DE Investment Extex LaPorte L.P. L.P. TX Exempt Wholesale Generator Concomber Ltd. Corporation Bermuda Captive Insurance Company SIGNATURE Pursuant to the requirements of the Public Utility Holding Company Act of 1935, the registrant has caused this Notification of Registration to be duly signed on its behalf in the City of Chicago and State of Illinois on the 23rd day of January, 2001. EXELON GENERATION COMPANY, LLC By: /s/ Edward J. Cullen, Jr. ---------------------------------- Name: Edward J. Cullen, Jr. Title: Vice President and General Counsel (Seal) Attest: /s/ Scott Peters - ----------------------------------- VERIFICATION Commonwealth of Pennsylvania County of Chesterfield The undersigned being duly sworn deposes and says that she has duly executed the attached Notification of Registration dated January 23, 2001 for and on behalf of Exelon Generation Company, LLC; that he is the Vice President 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. By: /s/ Edward J. Cullen, Jr. --------------------------------- Name: Edward J. Cullen, Jr. (OFFICIAL SEAL) Subscribed and sworn to before me, a notary public this 23rd day of January, 2001 /s/ Jeffrey A. Guistwhite - ----------------------------------- My commission expires May 31, 2003