X0202 4 2005-11-22 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 2005-11-22 4 S 0 500 51.56 D 23197 D Common Stock 2005-11-22 4 S 0 100 51.57 D 23097 D Common Stock 2005-11-22 4 S 0 200 51.61 D 22897 D Common Stock 2005-11-22 4 S 0 100 51.65 D 22797 D Common Stock (Deferred Shares) 19692 I By Stock Deferral Plan Common Stock (401k Shares) 5562 D Exercise and sale made pursuant to a rule 10b5-1 trading plan entered into on March 4, 2005. Shares were sold through small lots which are reported as individual sales on this form and on a second Form 4 being filed simultaneously because the EDGAR system will only accept 30 transactions on a single form. Shares held as of 10/31/2005 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. Scott N. Peters, Esq. Attorney in Fact for J. Barry Mitchell 2005-11-23