X0303 5 2008-12-31 0 0 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 19682 D Perf. Shares - Stk Units Common Stock 24948 24948 D Restricted Stock Units 08/01/2004 Common Stock 5000 5000 D Def. Comp. Phantom Shares Common Stock 449 449 D NQ Stk Ops 01/24/2005 42.85 Common Stock 36000 36000 D NQ Stk Ops 01/23/2006 58.55 Common Stock 30000 30000 D NQ Stk Ops 01/22/2007 59.96 Common Stock 28000 28000 D NQ Stk Ops 01/28/2008 73.29 Common Stock 22000 22000 D Balance includes the following shares acquired through the automatic dividend reinvestment feature of Exelon plans: 123 shares on 3/10/2008; 109 shares on 6/10/2008; 150 shares on 9/10/2008; and 184 shares on 12/10/2008. Performance Shares awarded pursuant to the Exelon Long Term Incentive Plan. 1/3 of the shares awarded vested immediately upon receipt. The remaining shares vest in 1/3 increments on each of the first and second anniversaries of the grant date. Under certain circumstances some or all of the vested shares may be settled in cash on a 1 for 1 basis based on the cash value of the underlying stock on the date of vesting. Balance includes the following shares acquired through the automatic dividend reinvestment feature of Exelon plans: 156 shares on 3/10/2008; 138 shares on 6/10/2008; 190 shares on 9/10/2008; and 233 shares on 12/10/2008. Restricted stock units granted under the Issuer's Long Term Incentive Plan. Restricted stock units may be settled on a 1 for 1 basis in shares of Exelon common stock. 100% of the shares will vest on 08/01/2009. 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. Non qualified employee stock options, awarded pursuant to the Exelon Long Term Incentive Plan. Options vest in 1/4 increments on each of the first four anniversaries of the grant date, referenced in column one, and expire on the tenth anniversay of the grant date. Elizabeth A. Moler 2009-01-26