Constellation Energy Corporation is an American energy company headquartered in Baltimore, Maryland. The company provides electric power, natural gas, and energy management services.

Bloom Energy Corporation (formerly, Ion America Corp.) is an American public company that designs and manufactures solid oxide fuel cells (SOFCs) which independently produce electricity onsite for power generation in data centers, manufacturing, and other commercial sectors. It was founded in 2001 and headquartered in…

DTE Energy (formerly Detroit Edison until 1996) is an American diversified energy company involved in the development and management of energy-related businesses and services in the United States and Canada. Its operating units include an electric utility serving 2.2 million customers and a natural gas utility serving…

NRG Energy, Inc. is an American energy company, headquartered in Houston, Texas.

Octopus Energy Group Limited (formerly Octopus Energy Limited and Octopus Energy Holdings Limited), known as Octopus Energy, is a British company operating in the fields of energy generation and supply. It was founded in 2015 with the backing of Octopus Group, a British asset management company.

Dominion Energy, Inc., commonly referred to as Dominion, is an American energy company headquartered in Richmond, Virginia that supplies electricity in parts of Virginia, North Carolina, and South Carolina and supplies natural gas to parts of Utah, Idaho and Wyoming, West Virginia, Ohio, Pennsylvania, North Carolina,…

NV Energy is a investor-owned public utility which generates, transmits and distributes electric service in northern and southern Nevada, including the Las Vegas Valley, and provides natural gas service in the Reno – Sparks metropolitan area of northern Nevada. Based in Las Vegas, Nevada, it serves about 1.

Valero Energy Corporation is an American-based fuels producer mostly involved in manufacturing and marketing transportation fuels and other related products. It is headquartered in San Antonio, Texas, United States.

Duke Energy Corporation is an American electric power and natural gas holding company headquartered in Charlotte, North Carolina. The company serves over 7 million customers in the eastern United States.

Progress Energy was a power generation and distribution company. Headquartered in Raleigh, North Carolina, Progress Energy served approximately 3.1 million customers in the Carolinas and Florida, with a total service area of 54,000 square miles (140,000 km2).