X0202 4 2008-05-20 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 2008-05-20 4 M 0 14625 32.54 A 38865 D Common Stock 2008-05-20 4 S 0 200 87.49 D 38665 D Common Stock 2008-05-20 4 S 0 125 87.50 D 38540 D Common Stock 2008-05-20 4 S 0 300 87.54 D 38240 D Common Stock 2008-05-20 4 S 0 400 87.78 D 37840 D Common Stock 2008-05-20 4 S 0 700 87.85 D 37140 D Common Stock 2008-05-20 4 S 0 500 87.93 D 36640 D Common Stock 2008-05-20 4 S 0 400 87.96 D 36240 D Common Stock 2008-05-20 4 S 0 200 87.97 D 36040 D Common Stock 2008-05-20 4 S 0 300 87.99 D 35740 D Common Stock 2008-05-20 4 S 0 800 88.03 D 34940 D Common Stock 2008-05-20 4 S 0 400 88.05 D 34540 D Common Stock 2008-05-20 4 S 0 500 88.06 D 34040 D Common Stock 2008-05-20 4 S 0 400 88.15 D 33640 D Common Stock 2008-05-20 4 S 0 300 88.19 D 33340 D Common Stock 2008-05-20 4 S 0 200 88.21 D 33140 D Common Stock 2008-05-20 4 S 0 600 88.27 D 32540 D Common Stock 2008-05-20 4 S 0 200 88.30 D 32340 D Common Stock 2008-05-20 4 S 0 500 88.31 D 31840 D Common Stock 2008-05-20 4 S 0 700 88.35 D 31140 D Common Stock 2008-05-20 4 S 0 300 88.36 D 30840 D Common Stock 2008-05-20 4 S 0 300 88.37 D 30540 D Common Stock 2008-05-20 4 S 0 500 88.38 D 30040 D Common Stock 2008-05-20 4 S 0 100 88.41 D 29940 D Common Stock 2008-05-20 4 S 0 300 88.45 D 29640 D Common Stock 2008-05-20 4 S 0 200 88.47 D 29440 D Common Stock 2008-05-20 4 S 0 600 88.48 D 28840 D NQ Stock Options 01/27/2004 32.54 2008-05-20 4 M 0 14625 D Common Stock 14625 29250 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. Balance includes 5,000 restricted shares. Non qualified employee stock options, awarded pursuant to the Exelon Long Term Incentive Plan. Options vest in 1/3 increments on each of the first three anniversaries of the grant date, referenced in column one, and expire on the tenth anniversay of the grant date. Scott N. Peters, Esq. Attorney in Fact for Elizabeth A. Moler 2008-05-21