X0202 4 2005-03-18 0001109357 EXELON CORP EXC 0001067838 ROWE JOHN W 10 SOUTH DEARBORN STREET 37TH FLOOR CHICAGO IL 60603 0 1 0 0 Chairman, President and CEO Common Stock 36982 D Common Stock (Deferred Shares) 266903 I By Stock Deferral Plan Common Stock (401k Shares) 5576 D Common Stock 3500 I Held By Spouse Performance Shares - Stock Units Common Stock 107663 D Deferred Comp. - Phantom Shares 2005-03-18 4 A 0 105 45.70 A Common Stock 105 29652 D Balance includes 3,093 shares held in the Employee Stock Purchase Plan. Balance includes 2,286 shares acquired on 03/10/2005 through the automatic dividend reinvestment feature of Exelon plans. Shares held as of 03/21/2005 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 second and third anniversaries of the award date. At the election of the reporting person, 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 922 shares acquired on 03/10/2005 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 251 shares acquired on 03/10/2005 through the automatic dividend reinvestment feature of Exelon plans. Scott N. Peters, Attorney in Fact for John W. Rowe 2005-03-21