Top Energy Providers of 1889

Electricity provider and cooperative serving rural communities

Electricity provider for Alabama residents and businesses

Allegheny Energy was an electric utility headquartered in Greensburg, Pennsylvania. It owned and operated electric generation facilities and delivered

A public utility holding company providing power in Iowa and Wisconsin.

Texas-based energy provider offering customizable plans and rewards

Leading American electric utility company providing power to millions of customers.

Independent oil and gas exploration and production company with operations in Africa, the Middle East, and Russia.

Oilexco Incorporated was an oil and gas exploration and production company. The company's producing properties and exploration activities were located

Oil and gas exploration and production company based in London.

Petroceltic International is a wholly owned subsidiary of Petroceltic Holdings Limited, a privately owned, UK headquartered, oil and gas company. The

Oil and gas exploration and production company based in central Asia.

Early-stage uranium exploration company in the Athabasca Basin

Renewable energy company providing waste-to-energy solutions globally.

Wave energy technology developer

U.S.-based fusion defense company providing radiation testing services for national security customers.

American energy holding company and subsidiary of Berkshire Hathaway.

Commercial energy supplier for small and medium-sized businesses

Bristol is a city and ceremonial county in South West England. It is located on the River Avon, and bordered by Gloucestershire to the north and Somer

Renewable energy supplier in the UK acquired by Octopus Energy in 2022.

Nationalised electricity generator and supplier for England and Wales, created in 1957 from the Central Electricity Authority