GenOn Energy, Inc., based in Houston, Texas, United States, is an energy company that provides electricity to wholesale customers in the United States. The company is one of the largest independent power producers in the nation with more than 7,000 megawatts of power generation capacity across the United States using natural gas, fuel oil and coal. GenOn Energy was headquartered in the Reliant Energy Plaza in Downtown Houston. The company, formerly known as RRI Energy, acquired Mirant on December 3, 2010. The corporate names and logos of both RRI Energy and Mirant were retired.
Energy Future Holdings Corporation is an electric utility company headquartered in Energy Plaza in Downtown Dallas, Texas, United States. The majority of the company's power generation is through coal and nuclear power plants. From 1998 to 2007, the company was known as TXU Corporation until its $45 billion leveraged buyout by Kohlberg Kravis Roberts, TPG Capital and Goldman Sachs Capital Partners. That purchase was the largest leveraged buyout in history. As of 2019, TXU Energy is a subsidiary of publicly traded Vistra Energy.
Constellation Energy Corporation is an American energy company headquartered in Baltimore, Maryland. The company provides electric power, natural gas, and energy management services. It has approximately two million customers across the continental United States.
NRG Energy, Inc. is an American energy company, headquartered in Houston, Texas. It was formerly the wholesale arm of Northern States Power Company (NSP), which became Xcel Energy, but became independent in 2000. NRG Energy is involved in energy generation and retail electricity. Their portfolio includes natural gas generation, coal generation, oil generation, nuclear generation, wind generation, utility-scale generation, and distributed solar generation. NRG serves over 7 million retail customers in 24 US states including Texas, Connecticut, Delaware, Illinois, Maryland, Massachusetts, New Jersey, New York, Pennsylvania, Ohio; the District of Columbia, and eight provinces in Canada.
Calpine Corporation is the largest generator of electricity from natural gas and geothermal resources in the United States, with operations in competitive power markets.
The Texas electricity market is deregulated, meaning that there is competition in the generation and distribution of electricity. Power generators in the Texas Interconnection, managed by the Electric Reliability Council of Texas, participate in an energy-only electricity market and are compensated only for the electricity they produce. The wholesale generation market was deregulated in 1995 and the distribution market in 1999, with Texas Senate Bill 7. This replaced the prior system in which power was generated and consumed locally by the same utility with one in which retail providers contracted with generators across the state.
Gexa Energy, headquartered in Houston, Texas, is a retail electricity provider which sells electricity service to residential and commercial customers in all deregulated markets in Texas.
Eastern Electricity plc was an electricity supply and distribution utility serving Eastern England, including East Anglia and part of Greater London. It was renamed Eastern Group under which name it was listed on the London Stock Exchange and was a constituent of the FTSE 100 Index until it was acquired by Hanson plc in 1995, before being purchased by Texas Utilities in 1998.
Griddy was an American power retailer that formerly sold energy to people in the state of Texas at wholesale prices for a $10 monthly membership fee and had approximately 29,000 members. The company itself was based in California.
Comanche Peak Nuclear Power Plant is located in Somervell County, Texas. The nuclear power plant is located 40 miles (64 km) southwest of Ft. Worth and about 60 miles (97 km) southwest of Dallas. It relies on nearby Comanche Creek Reservoir for cooling water. The plant has about 1,300 employees and is operated by Luminant Generation, a subsidiary of Vistra Corp.
The Monticello Steam Electric Station was a 1.8-gigawatt coal-fired power plant located southwest of Mount Pleasant, Texas, in Titus County, Texas. It operated from 1974 to 2018.
Luminant is a Texas-based electric utility. It is a wholly owned subsidiary of Energy Future Holdings Corporation. Luminant's operations include electricity generation and wholesaling, mining, construction, and development. The company has capacity for the generation of 18,300 megawatts (MW) of electricity in 20 power plants spread across Texas, of which 2,300 MW come from nuclear power generated at the company's Comanche Peak Nuclear Power Plant, 5,800 MW from coal-fired power plants, and the remainder from natural gas-fired plants. Luminant is also a major purchaser of wind power.
Oncor Electric Delivery Company is the largest transmission and distribution electric utility in the state of Texas and the 5th largest utility company in the US. Their service territory includes east, west, and north-central Texas, including Dallas, Fort Worth, Irving, Plano, Arlington, Beeville, Midland, Odessa, Killeen, Waco, Wichita Falls, Tyler, and other cities throughout Texas. In 2018, Sempra Energy acquired a majority stake in Oncor for US$9.45 billion.
Reliant Energy Retail Holding, LLC is an American energy company based in Houston, Texas. It serves the state of Texas.
Sandow Power Plant was a 1.1-gigawatt coal power plant located southwest of Rockdale, Texas in Milam County, Texas. It was operated by Luminant, a subsidiary of Vistra Corp. The plant closed in 2018.
Big Brown Power Plant was a 1.15-gigawatt coal power plant located northeast of Fairfield near Fairfield Lake State Park in Freestone County, Texas. It was operated by Vistra Corp's subsidiary, Luminant. The plant operated from 1971 to 2018.
Oak Grove Power Plant is a 1.79-gigawatt, coal power plant located north of Franklin, Texas in Robertson County, Texas. The plant is operated by Luminant, a subsidiary of Vistra Energy. It began operations in 2010.
The Electric Bond and Share Company (Ebasco) was a United States electric utility holding company organized by General Electric. It was forced to divest its holding companies and reorganize due to the passage of the Public Utility Holding Company Act of 1935. Following the passage of the Act, the U.S. Securities and Exchange Commission (SEC) selected the largest of the U.S. holding companies, Ebasco to be the test case of the law before the U.S. Supreme Court. The court case known as Securities and Exchange Commission v. Electric Bond and Share company was settled in favor of the SEC on March 28, 1938. It took twenty-five years of legal action by the SEC to break up Ebasco and the other major U.S. electric holding companies until they conformed with the 1935 act. It was allowed to retain control of its foreign electric power holding company known as the American & Foreign Power Company (A&FP). After its reorganization, it became an investment company, but soon turned into a major designer and engineer of both fossil fuel and nuclear power electric generation facilities. Its involvement in the 1983 financial collapse of the Washington Public Power Supply System's five nuclear reactors led to Ebasco's demise because of the suspension of nuclear power orders and lawsuits that included numerous asbestos claims. The U.S. nuclear industry stopped all construction of new facilities following the 1979 nuclear meltdown at Three Mile Island, going into decline because of radiation safety concerns and major construction cost overruns.
Vistra is a Fortune 500 integrated retail electricity and power generation company based in Irving, Texas.
