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

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

  1. NiSource

    World Rank (Aug-2026)
    1,225
    Market Cap (Aug-2026)
    20.381 Billion USD
    World Rank (Jan-05-2024)
    1,513
    Market Cap (Jan-05-2024)
    11.117 Billion USD
    World Rank (Jul-30-2023)
    1,506
    Market Cap (Jul-30-2023)
    11.462 Billion USD
    World Rank (Dec-25-2022)
    1,390
    Market Cap (Dec-25-2022)
    11.254 Billion USD
    World Rank (Jan-07-2022)
    1,755
    Market Cap (Jan-07-2022)
    10.95 Billion USD
    Annual Revenue in USD
    6,523 Million USD
    Annual Operating Income in USD
    1,835 Million USD
    Annual Net Income in USD
    930 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Stock Category
    S&P 500
    Yahoo @ NYSE
    Company Profile

    Natural gas utility and electric utility company with headquarters is in Indiana, USA.

    Company Website
    NISOURCE INC
    Wikipedia
    Wikipedia

  2. The AES Corporation

    World Rank (Aug-2026)
    2,125
    Market Cap (Aug-2026)
    10.509 Billion USD
    World Rank (Jan-05-2024)
    1,373
    Market Cap (Jan-05-2024)
    12.676 Billion USD
    World Rank (Jul-30-2023)
    1,234
    Market Cap (Jul-30-2023)
    14.525 Billion USD
    World Rank (Dec-25-2022)
    871
    Market Cap (Dec-25-2022)
    19.157 Billion USD
    World Rank (Jan-07-2022)
    1,317
    Market Cap (Jan-07-2022)
    15.40 Billion USD
    Annual Revenue in USD
    12,233 Million USD
    Annual Net Income in USD
    910 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    CEO
    Andres Gluski
    Stock Category
    S&P 500
    Yahoo @ NYSE
    Company Profile

    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.

    Company Website
    THE AES CORPORATION
    Wikipedia
    Wikipedia

  3. MGE Energy

    World Rank (Aug-2026)
    4,959
    Market Cap (Aug-2026)
    3.088 Billion USD
    World Rank (Jan-05-2024)
    4,783
    Market Cap (Jan-05-2024)
    2.636 Billion USD
    World Rank (Jul-30-2023)
    4,477
    Market Cap (Jul-30-2023)
    2.890 Billion USD
    World Rank (Dec-25-2022)
    4,568
    Market Cap (Dec-25-2022)
    2.591 Billion USD
    World Rank (Jan-07-2022)
    4,945
    Market Cap (Jan-07-2022)
    2.92 Billion USD
    Annual Revenue in USD
    744 Million USD
    Annual Operating Income in USD
    171 Million USD
    Annual Net Income in USD
    136 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ Nasdaq
    Company Profile

    Electric utility and natural gas distribution company. Headquarters is in USA. Produces electricity as well.

    Company Website
    MGE ENERGY INC
    Wikipedia
    Wikipedia

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