X0202 4 2008-01-01 0001109357 EXELON CORP EXC 0001194017 GIN SUE L 10 SOUTH DEARBORN STREET 54TH FLOOR CHICAGO IL 60603 1 0 0 0 Common Stock (Deferred Stock Units) 0 I By Exelon Directors' Deferred Stock Unit Plan Common Stock 2008-01-01 4 M 0 4138 81.64 A 46915 D Common Stock 2008-01-01 4 D 0 4138 81.64 D 42777 D Deferred Compensation - Phantom Shares 2008-01-01 4 M 0 4138 81.64 D Common Stock 4138 0 D Pursuant to amendment to the company's deferred stock unit plan and an election made in June 2007, the reporting person chose a one-time distribution of all accumulated stock units which were converted to shares under direct ownership. Balance includes 11,800 deferred stock units which were distributed to the reporting person pursuant to an amendement made to the company's deferred stock unit plan and an election made by the reporting person in June 2007. 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. Pursuant to amendment to the directors deferred compensation plan and an election made in June 2007, the reporting person chose a one-time distribution of deferred amounts under the plan. Scott N. Peters, Attorney in Fact for Sue L. Gin 2008-01-03