X0306 4 2021-12-31 0001109357 EXELON CORP EXC 0001786800 Richardson John M 10 S. DEARBORNSTREET 54TH FLOOR CHICAGO IL 60603 1 0 0 0 Common Stock (Deferred Stock Units) 2021-12-31 4 A 0 719 53.91 A 8522 I By Exelon Directors' Deferred Stock Unit Plan Balance includes 55 shares acquired on December 10, 2021 through automatic dividend reinvestment. Elizabeth M. Hensen, Attorney in Fact for John M. Richardson 2022-01-03