X0201 4/A 2004-02-05 2004-02-06 0001109357 EXELON CORP EXC 0001184019 KINGSLEY OLIVER D JR 10 SOUTH DEARBORN STREET 37TH FLOOR CHICAGO IL 60603 0 1 0 0 President Common Stock 2004-02-05 4 F 0 2868 66.10 D 43874 D Previously reported tax withholding for 02/05/2004 lapse of deferral period erroneously included shares withheld for taxes that had been previously withheld at the time the original stock award was deferred. Accordingly 148 fewer shares were withheld for taxes and have been added back to the common stock balance. Scott N. Peters, Esq. Attorney in Fact for Oliver D. Kingsley 2004-02-13