Baltimore Gas & Electric 8-K Exelon Reports Third Quarter 2019 Results

Q3 2019 GAAP Earnings $0.79 per share We have met or beaten1 the mid-point of our earnings guidance Adjusted earnings range for 17 of the past 19 quarters of $0.92 per share* MILESTONES & RECOGNITION OPERATIONAL METRICS Dow Jones Sustainability Index ComEd continued its top decile performance Named to the Dow Jones Sustainability Index for in SAIFI the 14th year in a row and in the top 20% of North American companies in all industries BGE, ComEd and PHI achieved top decile performance in Abandon Rate, while ComEd and PHI continued to perform in the top decile $20 million in Service Level Launched the Climate Change Investment BGE, ComEd and PECO recorded top decile Initiative to invest $20 million in startups in our performance in Customer Satisfaction service territories that are working on new technologies to reduce greenhouse gas emissions PECO and PHI performed in top decile in and mitigate climate change Gas Odor Response EXC Nasdaq Switched to Nasdaq and joined leading climate focused innovators Continued best-in-class performance across our generation fleet: Volunteerism 95.5% Q3 2019 Nuclear Capacity Factor² 50,000 hours Employees donated nearly 50,000 volunteer 96.5% hours in Q3 2019 Q3 2019 Renewables energy capture 97.5% STEM Academy Q3 2019 Power dispatch match Hosted 180 young diverse women at three STEM Academies in Washington D.C., Philadelphia, 39.2 TWhs and Chicago Owned and operated Q3 2019 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 and EDF’s equity ownership share of the CENG joint venture