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

AMERICAN ELECTRIC POWER COMPANY is Electricity generation and Electricity Utility company with headquarters is in USA.

As on 2022, AMERICAN ELECTRIC POWER COMPANY has 16,974 employees.

AMERICAN ELECTRIC POWER COMPANY annual revenue generated for period ending Dec-2022 was 19,639 million USD.

AMERICAN ELECTRIC POWER COMPANY annual net income generated for period ending Dec-2022 was 2,307 million USD.

REPUBLIC SERVICES is Waste and Garbage picking up, transport and recycling company with headquarters is in Arizona, USA. Picks up garbage and waste materials from residential houses, offices, companies, industries etc.

As on 2021 Financial facts:

Ciena Corporation is a networking systems, services and software company. It products are domain control and management software and intelligent automation. The company services are maintenance service, implementation service, systems Integration service, managed service, strategic network service, learning service, optimization service and insight service. The headquarters is in USA.

DOMINION ENERGY is Energy company and Electricity Utility company with businesses in electricity and natural gas supply.

As on 2022, DOMINION ENERGY has 17,200 employees.

DOMINION ENERGY annual revenue generated for period ending Dec-2022 was 17,174 million USD.

DOMINION ENERGY annual net income generated for period ending Dec-2022 was 901 million USD.

MPLX owns and operates midstream energy infrastructure and logistics assets, and provides fuels distribution services. MPLX's assets include a network of crude oil and refined product pipelines; an inland marine business; light-product terminals; storage caverns; refinery tanks, docks, loading racks, and associated piping; and crude and light-product marine terminals. The company also owns crude oil and natural gas gathering systems and pipelines as well as natural gas and NGL processing and fractionation facilities in key U.S. supply basins.

ONEOK is Natural Gas Processing, transmission and Distribution ( Gas Utility ) company with headquarters is in Oklahoma, USA.

As on 2022, ONEOK has 2,966 employees.

ONEOK annual revenue generated for period ending Dec-2022 was 22,386 million USD.

ONEOK annual net income generated for period ending Dec-2022 was 1,721 million USD.

Targa Resources is a Midstream Energy Infrastructure company. The company own, operate, acquire, gathering, compressing, treating, processing and selling natural gas. Gathering, storing, terminaling and selling crude oil.
The headquarters is in USA.

As on 2022, Targa Resources has 2,850 employees.

Targa Resources annual revenue generated for period ending Dec-2022 was 20,929 million USD.

SEMPRA ENERGY is Electric Utility and Gas Utility company with headquarters is in California, USA.It is an energy infrastructure company focused on connecting millions through the power of people, developing, building, operating and investing in clean power, energy networks, ideas and innovation. Sempra’s mission is to be North America’s premier energy infrastructure company. The Sempra family of companies have 20,000 talented employees who deliver energy with purpose to nearly 40 million consumers.

Electric Power Generation and Electricity Distribution (Electric Utility) company with headquarters is in USA.

As on 2022, ENTERGY CORPORATION has 11,707 employees.

ENTERGY CORPORATION annual revenue generated for period ending Dec-2022 was 13,764 million USD.

ENTERGY CORPORATION annual net income generated for period ending Dec-2022 was 1,103 million USD.

Vistra Corp is a energy holding company. It engages in the production of electricity and power generation. The company diverse portfolio, including natural gas, nuclear, solar and battery energy storage facilities. The headquarters is in USA.