About Constellation
Who We Are

A Leading Supplier of Innovative Energy Products & Services 

Constellation, an Exelon company, is a leading competitive supplier of power, natural gas, renewable energy and energy management products and services for homes and businesses across the continental US. We provide integrated energy solutions—from electricity and natural gas procurement and renewable energy supply to demand-side management solutions—that help customers strategically buy, manage and use their energy.

More than 100,000 commercial, industrial, public sector, government and institutional customers, including two-thirds of the Fortune 100, and more than 1 million residential customers rely on our commitment to innovation, dependability, transparency and service. That is the kind of value you and your communities can expect from Constellation.


The following is an overview of our diverse portfolio of energy solutions:


We have strong expertise in the policies and regulations that govern every local market and proactively provide our customers with market and regulatory updates to guide their energy management decisions. Our mission is to provide customers with energy in an easy and transparent process.

As part of Exelon’s family of companies, we strive for the highest standards in power generation, delivery and wholesale marketing. We are committed to providing superior value for our customers, employees, investors and the communities we serve.

Constellation Energy Nuclear Group, LLCSM (CENG) is a joint venture between Constellation Energy and EDF Group.

CENG, based in Baltimore, has a fleet of three nuclear power stations in Maryland and New York with a total of five units. CENG safely and reliably delivers approximately 3.73 percent of the U.S. nuclear industry’s power capacity, serving wholesale customers in competitive energy markets. With approximately 2,700 employees, the fleet produced more than 31.5 million megawatt-hours of electricity in 2010 and achieved an average capability factor of 94.2 percent.

In addition to CENG, Exelon Generation is the No. 1 competitive power generation in the nation, with owned generating assets totaling more than 35,000 megawatts.


Areas We Serve

Do we serve your state? Click below to view our interactive map.

Use the interactive map to see if Constellation Energy services are available in your area

Learn More About Exelon Corporation

Constellation joined the Exelon family of companies in 2012.

Visit Exelon's Website ›