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Edison International, through its subsidiaries, engages in the generation and distribution of electric power. The company supplies and delivers electricity to approximately 50,000 square mile area of southern California to residential, commercial, industrial, public authorities, agricultural, and other sectors. Its transmission facilities consist of lines ranging from 55 kV to 500 kV and approximately 80 transmission substations; distribution system consists of approximately 38,000 circuit-miles of overhead lines; approximately 31,000 circuit-miles of underground lines; and 730 distribution substations. The company was founded in 1886 and is based in Rosemead, California.

FirstEnergy Corp., through its subsidiaries, generates, transmits, and distributes electricity in the United States. It operates through Regulated Distribution and Regulated Transmission segments. The company owns and operates coal-fired, nuclear, hydroelectric, wind, and solar power generating facilities. It operates 24,080 circuit miles of overhead and underground transmission lines; and electric distribution systems, including 274,518 miles of overhead pole line and underground conduit carrying primary, secondary, and street lighting circuits. The company serves approximately 6 million customers in Ohio, Pennsylvania, West Virginia, Maryland, New Jersey, and New York. FirstEnergy Corp. was incorporated in 1996 and is headquartered in Akron, Ohio.

Fortis Inc. operates as an electric and gas utility company in Canada, the United States, and the Caribbean countries. It generates, transmits, and distributes electricity to approximately 447,000 retail customers in southeastern Arizona; and 103,000 retail customers in Arizona's Mohave and Santa Cruz counties with an aggregate capacity of 3,408 megawatts (MW), including 68 MW of solar capacity and 250 MV of wind capacity. The company also sells wholesale electricity to other entities in the western United States; owns gas-fired and hydroelectric generating capacity totaling 65 MW; and distributes natural gas to approximately 1,087,000 residential, commercial, and industrial customers in British Columbia, Canada. In addition, it owns and operates the electricity distribution system that serves approximately 592,000 customers in southern and central Alberta; owns four hydroelectric generating facilities with a combined capacity of 225 MW; and provides operation, maintenance, and management services to five hydroelectric generating facilities. Further, the company distributes electricity in the island portion of Newfoundland and Labrador with an installed generating capacity of 145 MW; and on Prince Edward Island with a generating capacity of 90 MW. Additionally, it provides integrated electric utility service to approximately 69,000 customers in Ontario; approximately 275,000 customers in Newfoundland and Labrador; approximately 34,000 customers on Grand Cayman, Cayman Islands; and approximately 17,000 customers on certain islands in Turks and Caicos. It also holds long-term contracted generation assets in Belize consisting of 3 hydroelectric generating facilities with a combined capacity of 51 MW; and the Aitken Creek natural gas storage facility. It also owns and operates approximately 90,500 circuit Kilometers (km) of distribution lines; and approximately 51,600 km of natural gas pipelines. Fortis Inc. was founded in 1885 and is headquartered in St. John's, Canada.

PPL Corporation, an energy company, focuses on providing electricity and natural gas to approximately 3.6 million customers in the United States. It operates through three segments: Kentucky Regulated, Pennsylvania Regulated, and Rhode Island Regulated. The company delivers electricity to customers in Pennsylvania, Kentucky, Virginia, and Rhode Island; delivers natural gas to customers in Kentucky and Rhode Island; and generates electricity from power plants in Kentucky. PPL Corporation was founded in 1920 and is headquartered in Allentown, Pennsylvania.

SSE plc engages in the generation, transmission, distribution, and supply of electricity. It generates electricity from water, gas, coal, oil, and multi fuel. The company distributes electricity to approximately 3.8 million homes and businesses across the north of the central belt of Scotland and central southern England; and owns, operates, and develops high voltage electricity transmission system in the north of Scotland and remote islands. It also produces, stores, distributes, and supplies gas. In addition, it engages in the electricity and utility contracting, telecommunications, energy trading, insurance, and property holding businesses, as well as provides maintenance services. The company was formerly known as Scottish and Southern Energy plc and changed its name to SSE plc in September 2011. SSE plc was incorporated in 1989 and is based in Perth, the United Kingdom.