Energy services companies

Argan is a holding company primarily engaged in power industry services.

Suburban Propane Partners is a company that specializes in the distribution of propane, heating oil, and refined fuels.

Ameresco is a company that designs, develops, and installs technologies for water and energy systems in buildings and provides operations and maintenance services.

ORIX (オリックス株式会社) is a company specializing in financing, investment, life insurance, banking, asset management, real estate, concession, environment and energy, industrial and ICT equipment, ships, and aircraft businesses.

Select Water Solutions (formerly known as Select Energy Services) is a company providing water-management solutions to the oil and gas industry.

NW Natural (Northwest Natural Gas Company) is a company that provides natural gas service.

RGS Energy (also known as Real Goods Solar, formerly known as Real Goods Trading Corporation) is a residential solar power integrator.

Kansai Electric Power (関西電力グループ ) is a company engaged in electricity, gas and heat supply, and telecommunication businesses.

SK innovation (SK이노베이션(주)) is a company specializing in energy and chemical solutions.

Enel is a company that provides energy solutions.

Veolia Environnement is a company that provides water, waste, and energy management solutions.

Iberdrola is a company that generates, transmits, distributes, and sells electricity.