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

Water utility company with headquarters is in Pennsylvania, USA.

AES CORPORATION is Electricity Generation and Electricity Distribution company. It is Electric Utility company with headquarters is in USA. As on 2021, AES CORPORATION generating 31,459 Gross MW in operation and 3,497 MW generating capacity under construction.

As on 2022, AES CORPORATION has 9,100 employees.

AES CORPORATION annual revenue generated for period ending Dec-2022 was 12,617 million USD.

Gas and Electricity Utility company with headquarters is in Oklahoma, USA.

DCP Midstream LP is a natural gas producing and marketing company. Portfolio consists of logistics, marketing, gathering, and processing assets across nine states. The headquarters is in USA.

Phillips 66 has acquired DCP Midstream in Jun-2023.

Idacorp is a Power Holding and Electric Utility company. It is dedicated to providing quality electric service to more than 5,70,000 general business customers in a 24,000 square mile service area in southern Idaho and eastern Oregon. The headquarters is in USA.

National Fuel Gas Company is a Energy company. It operates an integrated collection of natural gas and oil assets across four business segments they are exploration and production, pipeline and storage, gathering and utility. The company has approximately 91.0 million shares of common stock outstanding. The headquarters is in USA.

UGI Corporation is a Natural Gas and Electric distribution and Services company. It consists of residential, commercial, industrial, agricultural, wholesale and auto gas customers that use LPG for space heating, cooking, water heating, motor fuel, leisure activities, crop drying, irrigation, construction, power generation, manufacturing and aerosol propellant. The headquarters is in USA.

Ormat Technologies is a Renewable Power and Energy Solutions company. It design, build and supply power generating equipment for customers geothermal and recovered energy power plants in 30 countries. The headquarters is in USA.

Company provides from IT, hosting and managed services for your business to High-speed Internet, TV and Voice for your home. Headquarters is in USA.

CENTURYLINK is renamed to LUMEN TECHNOLOGIES in 2020.

Southwest Gas Holdings is a holding company with business interests in two major business segments they are Natural Gas Operations and Utility Infrastructure Services. It engaged in the business of purchasing, distributing and transporting natural gas in portions of Arizona, California and Nevada and serving over 2 million customers. The headquarters is in USA.