Exelon is the largest regulated electric utility in the U.S. by customer count, serving 10.4 million customers across six fully regulated transmission and distribution utilities: ComEd (Illinois), PECO (Pennsylvania), BGE (Maryland), Pepco (DC), DPL (Delaware), and ACE (New Jersey). The company operates zero merchant generation following the 2022 Constellation spin-off, deriving 100% of earnings from rate-regulated wires businesses with allowed ROEs of 9.25-10.25% across jurisdictions.
UtilitiesRegulated Electric & Gas Transmission and Distributionlow - Regulated utilities have high fixed costs (grid maintenance, depreciation, interest) but limited operating leverage because rate cases reset allowed revenues to match cost structures. Incremental capital deployment grows earnings predictably at allowed ROE levels. Weather normalization and decoupling mechanisms reduce volume sensitivity, creating stable cash flows with 5-6% annual EPS growth driven by rate base expansion rather than margin expansion.