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

Top Utilities Companies in USA List by Market Cap as of August 2026. Biggest and Top Utilities Companies in USA Companies by Market Cap. Largest Top Utilities Companies in USA List by Market Cap as of August 2026.
Top Utilities Companies in USA
Top Utilities Companies in USA, Biggest Utilities Companies in USA, Largest Utilities Companies in USA.

  1. El Paso Electric Company

    World Rank (Aug-2026)
    3,375
    World Rank (Jan-05-2024)
    3,375
    World Rank (Jul-30-2023)
    3,375
    World Rank (Dec-25-2022)
    3,375
    World Rank (Jan-07-2022)
    3,375
    Headquarters Country
    USA
    Company Profile
    El Paso Electric Company is a Electric Utility company. It providing generation, transmission and distribution service to approximately 437,000 retail and wholesale customers in a 10,000 square mile area of the Rio Grande valley in west Texas and southern New Mexico. The headquarters is in USA.
    Company Website
    EL PASO ELECTRIC COMPANY

  2. Plains GP Holdings

    World Rank (Aug-2026)
    3,581
    Market Cap (Aug-2026)
    5.114 Billion USD
    World Rank (Jan-05-2024)
    3,590
    Market Cap (Jan-05-2024)
    3.865 Billion USD
    World Rank (Jul-30-2023)
    3,714
    Market Cap (Jul-30-2023)
    3.743 Billion USD
    World Rank (Dec-25-2022)
    4,763
    Market Cap (Dec-25-2022)
    2.423 Billion USD
    World Rank (Jan-07-2022)
    6,061
    Market Cap (Jan-07-2022)
    2.12 Billion USD
    Annual Revenue in USD
    44,262 Million USD
    Annual Operating Income in USD
    1,428 Million USD
    Annual Net Income in USD
    260 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile
    Plains Group Holding is a Midstream Energy Infrastructure company. It provides logistics services for crude oil, natural gas liquids and natural gas. The company extensive network of pipeline transportation, terminal ling, storage and gathering assets in key crude oil and NGL producing basins and transportation corridors and at major market hubs in the United States and Canada. The headquarters is in USA.
    Company Website
    PLAINS GROUP HOLDINGS L.P.

  3. ONE Gas Inc.

    World Rank (Aug-2026)
    3,590
    Market Cap (Aug-2026)
    5.090 Billion USD
    World Rank (Jan-05-2024)
    3,807
    Market Cap (Jan-05-2024)
    3.605 Billion USD
    World Rank (Jul-30-2023)
    3,314
    Market Cap (Jul-30-2023)
    4.393 Billion USD
    World Rank (Dec-25-2022)
    3,206
    Market Cap (Dec-25-2022)
    4.090 Billion USD
    World Rank (Jan-07-2022)
    3,722
    Market Cap (Jan-07-2022)
    4.23 Billion USD
    Annual Operating Income in USD
    457 Million USD
    Annual Net Income in USD
    264 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile

    ONE Gas is a Natural Gas Distribution Services company. It provides natural gas distribution services to more than 2 million customers in Oklahoma, Kansas and Texas. The company serves residential, commercial, industrial, transportation and wholesale customers in all three states. The headquarters is in USA.

    Company Website
    ONE GAS INC

  4. Spire

    World Rank (Aug-2026)
    3,689
    Market Cap (Aug-2026)
    4.897 Billion USD
    World Rank (Jan-05-2024)
    3,985
    Market Cap (Jan-05-2024)
    3.390 Billion USD
    World Rank (Jul-30-2023)
    3,956
    Market Cap (Jul-30-2023)
    3.446 Billion USD
    World Rank (Dec-25-2022)
    3,524
    Market Cap (Dec-25-2022)
    3.662 Billion USD
    World Rank (Jan-07-2022)
    4,390
    Market Cap (Jan-07-2022)
    3.44 Billion USD
    Annual Revenue in USD
    2,476 Million USD
    Annual Operating Income in USD
    524 Million USD
    Annual Net Income in USD
    272 Million USD
    Annual Results for Period Ending
    For year ending September-2025
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile

    Spire is a Natural Gas company. It serve more than 1.8 million customers making it the fifth largest publicly traded natural gas company in the country. It is committed to transforming business and pursuing growth through growing organically, investing in infrastructure and advancing through innovation. The headquarters is in USA.

    Company Website
    SPIRE INC

  5. Primoris Services Corporation

    World Rank (Aug-2026)
    3,895
    Market Cap (Aug-2026)
    4.484 Billion USD
    World Rank (Jan-05-2024)
    6,287
    Market Cap (Jan-05-2024)
    1.688 Billion USD
    World Rank (Jul-30-2023)
    6,454
    Market Cap (Jul-30-2023)
    1.657 Billion USD
    World Rank (Dec-25-2022)
    7,670
    Market Cap (Dec-25-2022)
    1.164 Billion USD
    World Rank (Jan-07-2022)
    7,844
    Market Cap (Jan-07-2022)
    1.37 Billion USD
    Annual Revenue in USD
    7,575 Million USD
    Annual Operating Income in USD
    412 Million USD
    Annual Net Income in USD
    275 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ Nasdaq
    Company Profile
    Primoris Services Corporation is the Parent company of Multiple Diversified Construction and Engineering. It is having built projects throughout the United States as well as Latin America, South and Central America and South East Asia. The headquarters is in USA.
    Facts About Company
    The company annual revenue is 789.8 million USD and 1,600 employees as on 2020.
    Company Website
    PRIMORIS SERVICES CORPORATION

  6. Northwestern Energy Group

    World Rank (Aug-2026)
    3,932
    Market Cap (Aug-2026)
    4.418 Billion USD
    World Rank (Jan-05-2024)
    4,235
    Market Cap (Jan-05-2024)
    3.136 Billion USD
    World Rank (Jul-30-2023)
    4,018
    Market Cap (Jul-30-2023)
    3.363 Billion USD
    World Rank (Dec-25-2022)
    3,698
    Market Cap (Dec-25-2022)
    3.430 Billion USD
    World Rank (Jan-07-2022)
    4,622
    Market Cap (Jan-07-2022)
    3.19 Billion USD
    Annual Revenue in USD
    1,611 Million USD
    Annual Operating Income in USD
    326 Million USD
    Annual Net Income in USD
    181 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile

    Northwestern Energy Group is a Reliable and Affordable Energy company. It serve 7,34,800 residential and business customers with electricity and natural gas. The company has miles of natural gas line are 9,483 plus storage facilities. It own and operate a diverse generation fleet of wind, water, natural gas and coal fired resources and the high voltage transmission system and distribution system that reliably delivers responsibly produced electricity to more than 4,27,000 customers daily. The headquarters is in USA.

    Company Website
    NORTHWESTERN CORPORATION

  7. MDU Resources Group

    World Rank (Aug-2026)
    3,974
    Market Cap (Aug-2026)
    4.344 Billion USD
    World Rank (Jan-05-2024)
    3,523
    Market Cap (Jan-05-2024)
    3.977 Billion USD
    World Rank (Jul-30-2023)
    3,269
    Market Cap (Jul-30-2023)
    4.478 Billion USD
    World Rank (Dec-25-2022)
    2,276
    Market Cap (Dec-25-2022)
    6.182 Billion USD
    World Rank (Jan-07-2022)
    2,689
    Market Cap (Jan-07-2022)
    6.40 Billion USD
    Annual Revenue in USD
    1,863 Million USD
    Annual Operating Income in USD
    290 Million USD
    Annual Net Income in USD
    190 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile

    USA based company having Core Businesses:

    Company Website
    MDU RESOURCES GROUP INC
    Wikipedia
    Wikipedia

  8. Otter Tail Corporation

    World Rank (Aug-2026)
    4,251
    Market Cap (Aug-2026)
    3.899 Billion USD
    World Rank (Jan-05-2024)
    3,842
    Market Cap (Jan-05-2024)
    3.553 Billion USD
    World Rank (Jul-30-2023)
    4,009
    Market Cap (Jul-30-2023)
    3.374 Billion USD
    World Rank (Dec-25-2022)
    4,759
    Market Cap (Dec-25-2022)
    2.425 Billion USD
    World Rank (Jan-07-2022)
    5,074
    Market Cap (Jan-07-2022)
    2.82 Billion USD
    Annual Revenue in USD
    1,304 Million USD
    Annual Operating Income in USD
    346 Million USD
    Annual Net Income in USD
    276 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ Nasdaq
    Company Profile
    Otter Tail Corporation is a Electric Utility and Manufacturing Platforms company. It provides electricity and energy services to more than a quarter million people in Minnesota, North Dakota and South Dakota and also provides metal fabrication services for custom machine parts and metal components through metal stamping, tool and die, machining, tube bending, welding and assembly. The company is having employees in the energy sector is approximately 680 employees and manufacturing is approximately 1,200 employees. The headquarters is in USA.
    Company Website
    OTTER TAIL CORPORATION

  9. USA Compression Partners Lp

    World Rank (Aug-2026)
    4,280
    Market Cap (Aug-2026)
    3.858 Billion USD
    World Rank (Jan-05-2024)
    5,078
    Market Cap (Jan-05-2024)
    2.401 Billion USD
    World Rank (Jul-30-2023)
    5,890
    Market Cap (Jul-30-2023)
    1.926 Billion USD
    World Rank (Dec-25-2022)
    5,626
    Market Cap (Dec-25-2022)
    1.894 Billion USD
    World Rank (Jan-07-2022)
    6,999
    Market Cap (Jan-07-2022)
    1.68 Billion USD
    Annual Revenue in USD
    998 Million USD
    Annual Operating Income in USD
    307 Million USD
    Annual Net Income in USD
    111 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile
    USA Compression Partners is a third party provider of mission critical compression services to customers across the Oil and Gas Industry. It also provide specialized compression applications aiding in the production of crude oil and has 3.7 million of compression fleet horsepower, making it one of the nation largest independent providers of natural gas compression services. The headquarters is in USA.
    Company Website
    USA COMPRESSION PARTNERS LP

  10. Pattern Energy Group

    World Rank (Aug-2026)
    4,304
    World Rank (Jan-05-2024)
    4,304
    World Rank (Jul-30-2023)
    4,304
    World Rank (Dec-25-2022)
    4,304
    World Rank (Jan-07-2022)
    4,304
    Annual Revenue in USD
    524 Million USD
    Annual Operating Income in USD
    -47 Million USD
    Annual Net Income in USD
    -31 Million USD
    Annual Results for Period Ending
    For year ending December-2019
    Headquarters Country
    USA
    Company Profile

    Pattern Energy Group is a Renewable Energy company. It operational portfolio includes 28 utility scale renewable energy facilities in the United States, Canada and Japan, management team responsible for building more than 4.5 GW of renewable energy projects worldwide. The headquarters is in USA.

    Canada Pension Plan Investment Board (CPPIB) acquired Pattern Energy Group for 2.3 Billion USD as on Nov-2019.

    Company Website
    PATTERN ENERGY GROUP INC

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