X0202 4 2008-02-28 0001109357 EXELON CORP EXC 0001184021 MOLER ELIZABETH A 10 SOUTH DEARBORN STREET 54TH FLOOR CHICAGO IL 60603 0 1 0 0 Executive Vice President Common Stock 2008-02-28 4 S 0 300 77.33 D 29617 D Common Stock 2008-02-28 4 S 0 400 77.34 D 29217 D Common Stock 2008-02-28 4 S 0 400 77.35 D 28817 D Common Stock 2008-02-28 4 S 0 300 77.36 D 28517 D Common Stock 2008-02-28 4 S 0 800 77.37 D 27717 D Common Stock 2008-02-28 4 S 0 400 77.39 D 27317 D Common Stock 2008-02-28 4 S 0 300 77.41 D 27017 D Common Stock 2008-02-28 4 S 0 200 77.42 D 26817 D Common Stock 2008-02-28 4 S 0 400 77.45 D 26417 D Common Stock 2008-02-28 4 S 0 500 77.47 D 25917 D Common Stock 2008-02-28 4 S 0 400 77.49 D 25517 D Common Stock 2008-02-28 4 S 0 200 77.50 D 25317 D Common Stock 2008-02-28 4 S 0 300 77.51 D 25017 D Common Stock 2008-02-28 4 S 0 200 77.52 D 24817 D Common Stock 2008-02-28 4 S 0 400 77.72 D 24417 D Common Stock 2008-02-28 4 S 0 300 77.76 D 24117 D Exercise and all reported sales were made pursuant to a rule 10b5-1 trading plan entered into on September 13, 2007. Shares were sold through small lots which are reported as individual sales on this form and on other Form 4s being filed simultaneously because the EDGAR system will only accept 30 transactions on a single form. Scott N. Peters, Esq. Attorney in Fact for Elizabeth A. Moler 2008-02-29