Exelon Generation 8-K Exelon Reports First Quarter 2018 Results

GAAP Earnings $0.60 per share Adjusted earnings of $0.96 per share* Hurricane Support CORPORATE STEWARDSHIP OPERATIONAL METRICS Continued best-in-class performance across our Nuclear fleet: 96.5% 40 TWhs Owned and operated Q1 production² Q1 Nuclear Capacity Factor² Exelon Generation line mechanics, crew leaders, safety personnel million in savings more than 144 from all six Exelon utilities mobilized to assist restoration ef_forts in Puerto Rico zero emissions certificate (ZEC) legislation passed by legislature New Jersey Electric & Gas customers to receive from Tax Cuts & Jobs Act $500 Utilities Pepco reached settlement agreements on regulatory rate reviews in Maryland and D.C. Continued top-quartile performance across key customer satisfaction and operating metrics Record reliability for Pepco in D.C. since merger closed two years ago Storm recovery: More than 1,200 ComEd employees and contractors aided restoration ef_forts in the mid-Atlantic following three Nor’easters in March emissions reduction Launched new goal to reduce emissions from internal operations by 15 percent by 2022 15% Environmental Protection Agency named all five of Exelon’s eligible utilities as Energy Star Partners. Energy ef_f_icient Energy Star Partners We have met or beaten1 the mid-point of our earnings guidance range for 11 of the past 13 quarters * For reconciliation of GAAP Net Income to Adjusted (non-GAAP) Operating Earnings, refer to the tables beginning on Pg. 8 in our press release (1) Non-GAAP Earnings are used for setting guidance and comparing to actual results (2) Excludes Salem