The energy sector includes corporations that primarily are in the business of producing or supplying energy such as fossil fuels or renewables.

The energy sector has been an important driver of industrial growth over the past century, providing fuel to power the rest of the economy.

Companies in the energy industry are classified based on how the energy is sourced such as non-renewables or fossil fuels and renewables such as solar.

The many types of utilities available include large companies that offer multiple services such as electricity and natural gas. Other utility companies might specialize in just one type of service, such as water. Some utilities rely on clean and renewable energy sources like wind turbines and solar panels, to produce electricity.