Exhibit 99.1 News Release Contact: James Gherardi Corporate Comm unications 312-394-7417 Andrew Plenge Investor Relatio ns 312-394-2345 EXELON REPORTS FIRST QUARTER 2024 RESULTS Earnings Release Highlights • GAAP Net Income of $0.66 per share and Adjusted (non-GAAP) Operating Earnings of$0.68 per share for the first quarter of 2024 • Affirming full year 2024 Adjusted (non-GAAP) Operating Earnings guidance range of $2.40-$2.50 per share • Reaffirming fully regulated operating EPS compounded annual growth ta ...