X0306 5 2019-12-31 0 0 0001109357 EXELON CORP EXC 0001740087 Nigro Joseph 10 S. DEARBORN STREET 54TH FLOOR CHICAGO IL 60603 0 1 0 0 Sr. EVP & Chief Fin. Officer Common Stock 45774 D Restricted Stock Unit Awards 2017 0 Common Stock 6186 6186 D Restricted Stock Unit Awards 2018 0 Common Stock 14354 14354 D Restricted Stock Unit Awards 2019 0 Common Stock 17163 17163 D Restricted Stock Unit Award (01/29/2018) 0 Common Stock 40000 40000 D NQ Stock Option (right to buy) 03/12/2012 39.81 Common Stock 13000 13000 D NQ Stock Option (right to buy) 01/24/2011 43.4 Common Stock 13400 13400 D Previously awarded restricted stock units (RSUs) granted pursuant to the Exelon Long Term Incentive Plan. RSUs are granted annually at the Compensation and Leadership Development committee's first meeting in January or February and vest in 1/3 increments on the date of the committee's first annual meeting in the first, second and third years after the award was granted. Award balances accrue addtional RSUs through quarterly dividend reinvestment that vest on the same schedule as the underlying award. Balance includes 184 shares acquired through quarterly dividend reinvestment during 2019. Balance includes 427 shares acquired through quarterly dividend reinvestment during 2019. Balance includes 511 shares acquired through quarterly dividend reinvestment during 2019. Restricted stock unit award granted pursuant to the Exelon Long Term Incentive Plan. 100% of the shares will vest on January 22, 2022. Non qualified employee stock options, awarded pursuant to the Exelon Long Term Incentive Plan. Options are fully vested and expire on the tenth anniversay of the grant date referenced in Column 1. Elizabeth M. Hensen, Attorney-in-Fact for Joseph Nigro 2020-01-22