Exelon Corp.
Exelon Corporation (EXC)
Overview
Exelon Corporation is the largest fully regulated electric and gas transmission-and-distribution utility holding company in the United States, headquartered in Chicago, Illinois. It serves approximately 10 million customers across six regulated utilities in Illinois, Pennsylvania, Maryland, Delaware, New Jersey, and Washington, D.C. For fiscal year 2025, Exelon reported revenue of roughly $24–25 billion and net income of approximately $2.7–2.8 billion, with about 20,500 employees. The company was formed in 2000 through the merger of PECO Energy and Unicom (parent of Commonwealth Edison), and it took its current shape in February 2022 when it spun off its competitive power generation arm as an independent company, Constellation Energy, leaving Exelon as a pure-play regulated "wires and pipes" utility.
What They Do & How They Make Money
Exelon does not generate power for sale on the open market — since the 2022 Constellation spinoff, it is exclusively in the business of delivering electricity and natural gas that others generate, over infrastructure it owns. Its revenue comes from state-regulated delivery rates set by public utility commissions in each of its service territories, plus FERC-regulated transmission rates. Like other regulated utilities, Exelon earns a return on invested capital: state and federal regulators set an allowed return on equity (typically around 9–10.5%), and Exelon's earnings growth is driven primarily by how much capital it can deploy into approved grid investments — modernizing aging distribution infrastructure, hardening the grid against storms, expanding capacity for electrification (EVs, heat pumps, data centers), and building out transmission to support new generation, including the surge in demand tied to AI/data-center electricity load in its territories (especially PJM markets in Illinois, Pennsylvania, and Maryland). Because rates are cost-of-service based, Exelon's profitability is less tied to how much electricity is actually consumed and more to the size and growth of its regulated "rate base."
Business Segments
Exelon operates through six wholly owned regulated utility subsidiaries, which together constitute its reporting segments:
- ComEd (Commonwealth Edison) — Illinois, roughly 4 million electric customers; Exelon's largest single utility and headquartered alongside the parent company in Chicago.
- PECO Energy — southeastern Pennsylvania (Philadelphia area), about 1.6 million electric and 500,000+ natural gas customers.
- BGE (Baltimore Gas and Electric) — central Maryland, roughly 1.25 million electric and 650,000 natural gas customers; typically Exelon's second-largest utility by customer count.
- Pepco (Potomac Electric Power Company) — Washington, D.C. and parts of Maryland, about 842,000 electric customers.
- Delmarva Power — Delaware and parts of Maryland, roughly 515,000 electric and 130,000 natural gas customers.
- Atlantic City Electric (ACE) — southern New Jersey, about 545,000 electric customers.
Each utility functions as a distinct regulated rate-making entity, filing separate rate cases with its state commission, though Exelon manages them under a shared corporate structure with common capital allocation, credit, and transmission investment strategy (much of the fleet operates in the PJM Interconnection footprint).
Competitors
Because regulated utilities operate as exclusive regional franchises, Exelon's individual subsidiaries do not compete for retail customers within their own service areas. Competition instead plays out at the investor/capital level and, in adjacent or overlapping markets, among nearby utilities:
- Regional/adjacent utilities: PPL Corporation and FirstEnergy (Pennsylvania and Ohio), Dominion Energy and AEP (Virginia/PJM footprint), Consolidated Edison and PSEG (New York/New Jersey), and WEC Energy Group and Ameren (Midwest, near ComEd's Illinois territory).
- National regulated-utility peers (capital-markets and scale comparisons): Duke Energy, Southern Company, American Electric Power, NextEra Energy, Dominion Energy, and Xcel Energy — the standard peer group utility investors and ratings agencies use to benchmark Exelon.
- Indirect competitor / former affiliate: Constellation Energy, Exelon's own 2022 spinoff, now competes in the deregulated generation and retail power supply market — a business Exelon deliberately exited, so the two are no longer in the same line of business but are frequently compared given their shared history.
Competitive Position
Exelon's core competitive advantage is scale combined with regulatory diversification: it is the largest regulated electric utility in the U.S. by customer count, and its six utilities span multiple state regulatory jurisdictions plus FERC-regulated transmission, which diversifies regulatory and political risk relative to single-state utilities. Its footprint overlaps heavily with the PJM Interconnection, the largest competitive wholesale power market in the U.S., which is experiencing outsized load growth from data centers and AI infrastructure — a structural tailwind for transmission and distribution capital spending, and by extension for Exelon's regulated earnings growth, since more grid investment (interconnection upgrades, capacity expansion) directly grows the rate base on which it earns a return.
Key risks include the inherently political nature of rate case outcomes: ComEd in particular has faced reputational and regulatory scrutiny following a 2020 federal bribery scandal involving Illinois state officials, which resulted in a deferred prosecution agreement and ongoing reputational overhang. Rate cases in Illinois, Maryland, and D.C. have also grown more contentious as consumer advocates push back on bill increases tied to grid modernization and reliability spending. Rising interest rates raise the cost of Exelon's debt-heavy capital structure, a persistent risk for capital-intensive utilities. Longer term, the pace and shape of data-center demand growth is a double-edged sword — a major opportunity for rate-base growth, but also a source of forecasting risk if projected load growth (and the associated infrastructure buildout it justifies to regulators) fails to materialize as expected, or if large new industrial loads shift costs onto residential ratepayers in politically sensitive ways.