X0202 4 2005-09-30 0001109357 EXELON CORP EXC 0001185162 MITCHELL J BARRY 10 SOUTH DEARBORN STREET 37TH FLOOR CHICAGO IL 60603 0 1 0 0 Senior Vice President and CFO Common Stock 22797 D Common Stock (Deferred Shares) 19692 I By Stock Deferral Plan Common Stock (401k Shares) 5561 D Performance Shares - Stock Units Common Stock 11327 D Deferred Comp. - Phantom Shares 2005-09-30 4 A 0 14 53.44 A Common Stock 14 5095 D Balance includes 55 shares acquired on 09/10/2005 through the automatic dividend reinvestment feature of Exelon plans. Balance includes 139 shares acquired on 09/10/2005 through the automatic dividend reinvestment feature of Exelon plans. Shares held as of 09/30/2005 in a multi-fund 401(k) Plan to be settled in cash upon the reporting person's termination of employment for any reason on a 1:1 basis. Shares are acquired through regular periodic contributions, company matching contributions, and the automatic reinvestment of dividends. Performance Shares awarded pursuant to the Exelon Long Term Incentive Plan. 1/3 of the shares awarded vest immediately upon receipt. The remaining shares vest in 1/3 increments on each of the first and second anniversaries of the award date. Under certain circumstances up to one half of the second and third vestings may either be settled in common stock on a 1 for 1 basis, or be settled in cash based on the cash value of the underlying stock on the date of vesting. Balance includes 80 shares acquired on 09/10/2005 through the automatic dividend reinvestment feature of Exelon plans. Phantom shares held in a multi-fund deferred compensation plan to be settled for cash upon the reporting person's termination of employment for any reason on a 1:1 basis. Shares are acquired through regular periodic contributions, company matching contributions, and the automatic reinvestment of dividends. Balance includes 36 shares acquired on 09/10/2005 through the automatic dividend reinvestment feature of Exelon plans. Scott N. Peters, Esq. Attorney in Fact for J. Barry Mitchell 2005-10-03