Potomac Electric Power 8-K Exelon Reports First Quarter 2019 Results

Q1 2019 GAAP Earnings $0.93 per share We have met or beaten1 the mid-point of our earnings guidance Adjusted earnings range for 15 of the past 17 quarters of $0.87 per share* MILESTONES & RECOGNITION OPERATIONAL METRICS Workforce of the Future Utilities Exelon Utilities CEO Anne Pramaggiore testified in support of Blue Collar to Green Collar Jobs Act Strong reliability performance with BGE before the House Energy & Commerce Committee and ComEd achieving top decile performance in CAIDI Zero Emissions Excellent Customer Operation metrics Credit (ZEC) across the utilities U.S. Supreme Court armed that states have the right to enact clean energy programs like ZECs Top quartile Gas Odor Response across all utilities with PECO and PHI achieving top decile performance World's Most Admired Companies 2019 Exelon made Fortune’s coveted list for the 12th year Continued best-in-class performance Pepco Holdings Merger across our generation fleet: Atlantic City Electric, Delmarva Power and Pepco celebrate three years as Exelon Companies 97. 1% Q1 Nuclear Capacity Factor² Best quarterly capacity factor in more than More than $470 million 10 years In total economic impact in our communities 96.5% More than $15 million Q1 2019 Renewables energy capture In charitable giving across our communities supporting hundreds of local partners 97.8 % Q1 2019 Power dispatch match Approx. $4 billion Invested in modernizing and enhancing the 39.2 TWhs local energy grid Owned and operated Q1 nuclear production² * For reconciliation of GAAP Net Income to Adjusted (non-GAAP) Operating Earnings, refer to the tables in our press release (1) Non-GAAP Earnings are used for setting guidance and comparing to actual results (2) Excludes Salem