Top Utilities Companies in USA List by Market Cap as of August 2026

Portland General Electric is a Electric Utility company. The headquarters is in USA.

PNM Resources is an energy holding company. It is electric utility company with 2,811 megawatts of generation capacity and provides electricity to approximately 790,000 homes and businesses in New Mexico and Texas. The company consolidated operating revenues of $1.5 billion as per 2019. The headquarters is in USA.

EQM Midstream partners Lp is a Energy Utilities, Oil and Gas company. The company services to producers, marketers and local distribution companies through its strategically located natural gas transmission, storage and gathering systems and water services to support energy development and production in the Marcellus and Utica regions. The headquarters is in USA.

Casella Waste Systems is a Waste Management company. It manages over 10,000 customer locations in over 40 states across North America delivering a wide range of environmental services and zero waste solutions to its large and multi site customers. The headquarters is in USA.

South Jersey Industries is an Energy Services Holding company. The company regulated natural gas utility business, delivers safe, reliable, affordable natural gas to approximately 700,000 South Jersey Gas and Elizabethtown Gas customers. It promote efficiency clean technology and renewable energy by providing customized wholesale commodity marketing and fuel management services and developing, owning and operating on site energy production facilities. The headquarters is in USA.

Black Hills Corporation is a Electricity Power, Oil and Gas company. The company serves over 1.28 million electric and natural gas utility customers in more than 800 communities in Arkansas, Colorado, Iowa, Kansas, Montana, Nebraska, South Dakota and Wyoming. The headquarters is in USA.

Shell Midstream Partners is a Pipelines and Other Midstream and Logistics Assets company. It is having network of approximately 100 miles of gas pipeline connecting multiple refineries and plants operated along the Gulf Coast to Shell Chemical sites including Shells Norco refinery and Deer Park refinery. The headquarters is in USA.

New Jersey Resources Corporation is a Natural Gas company. The headquarters is in USA.

Clearway Energy is a Clean Energy in the United States. and its asset portfolio includes over 7,000 megawatts of wind, solar and natural gas fired power generation facilities, as well as district energy systems.