Alliant Energy Corporation operates as a utility holding company that provides regulated electricity and natural gas services. It operates through three segments: Utility Electric Operations, Utility Gas Operations, and Utility Other.

CMS Energy Corporation operates as an energy company primarily in Michigan. The company operates through three segments: Electric Utility; Gas Utility; and Enterprises.

DTE Energy Company engages in the utility operations. The company's Electric segment generates, purchases, distributes, and sells electricity to approximately 2.3 million residential, commercial, and industrial customers in southeastern Michigan.

Evergy, Inc., together with its subsidiaries, engages in the generation, transmission, distribution, and sale of electricity in Kansas and Missouri, the United States.

Entergy Corporation, together with its subsidiaries, engages in the production and retail distribution of electricity in the United States. The company operates in two segments, Utility and Entergy Wholesale Commodities.

IDACORP, Inc., together with its subsidiaries, engages in the generation, transmission, distribution, purchase, and sale of electric energy in the United States.

Pinnacle West Capital Corporation, through its subsidiary, Arizona Public Service Company, provides retail and wholesale electric services primarily in the state of Arizona.

Portland General Electric Company, an integrated electric utility company, engages in the generation, wholesale purchase, transmission, distribution, and retail sale of electricity in the state of Oregon.

Enel Chile S.A., an electricity utility company, engages in the generation, transmission, and distribution of electricity in Chile. The company operates through Generation Business and Distribution Business segments.

Centrais Elétricas Brasileiras S.A. - Eletrobras, through its subsidiaries, engages in the generation, transmission, and distribution of electricity in Brazil. The company generates electricity through hydroelectric, thermal, nuclear, wind, and solar plants.

Korea Electric Power Corporation, an integrated electric utility company, generates, transmits, and distributes electricity in South Korea and internationally. The company operates through Transmission and Distribution, Nuclear Power Generation, Thermal Power Generation, and Others segments.

Central Puerto S.A. generates and sells electric power to private and public customers in Argentina. It also produces steam. As of December 31, 2021, the company owned and operated five thermal generation plants, one hydroelectric generation plant, and seven wind farms with a total installed capacity of 4,809 MW.

Ameren Corporation, together with its subsidiaries, operates as a public utility holding company in the United States. It operates through four segments: Ameren Missouri, Ameren Illinois Electric Distribution, Ameren Illinois Natural Gas, and Ameren Transmission.

CenterPoint Energy, Inc. operates as a public utility holding company in the United States. The company operates through Electric and Natural Gas segments.