World Top 100 Power Generation Companies List by Market Cap as of August 2026

World Top 100 Power Generation Companies List by Market Cap as of August 2026, World Biggest 100 Power Generation Companies by Market Cap, World Largest 100 Power Generation Companies in the World by market cap as of August 2026.

World Top Power Generation Companies in 2026
World Top Power Generation Companies by Market Cap 2026, World Largest Power Generation Companies by Market Cap in 2026.

  1. SSE PLC

    World Rank (Aug-2026)
    666
    Market Cap (Aug-2026)
    39.667 Billion USD
    World Rank (Jan-05-2024)
    716
    Market Cap (Jan-05-2024)
    25.694 Billion USD
    World Rank (Jul-30-2023)
    788
    Market Cap (Jul-30-2023)
    23.845 Billion USD
    World Rank (Dec-25-2022)
    752
    Market Cap (Dec-25-2022)
    22.354 Billion USD
    World Rank (Jan-07-2022)
    885
    Market Cap (Jan-07-2022)
    23.67 Billion USD
    Annual Revenue in USD
    16,043 Million USD
    Annual Operating Income in USD
    -742 Million USD
    Annual Net Income in USD
    -158 Million USD
    Annual Results for Period Ending
    Mar-2023 ending year
    Headquarters Country
    UK
    CEO
    Alistair Phillips-Davies
    Stock Category
    FTSE 100
    S&P EUROPE 350
    Yahoo @ LSE
    Company Profile

    SSE PLC is a Electricity generation and distribution company. SSE Energy Services was acquired by OVO Energy from SSE plc. SSE Energy Services is now owned and operated by OVO Energy. SSE's vision is to be a leading energy company in a low carbon world. Headquarters is in UK.

    SSE PLC Business Segments:

    • SSE Renewables
    • SSEN Distribution
    • SSEN Transmission
    • SSE Thermal
    • SSE Energy Solutions
    • SSE Airtricity
    Facts About Company

    SSE PLC annual revenue generated for period ending Mar-2023 was 12,490 million GBP.

    SSE PLC annual net income generated for period ending Mar-2023 was -123 (Loss) million GBP.

    SSE PLC annual revenue generated for period ending Mar-2022 was 8,608 million GBP.

    SSE PLC annual net income generated for period ending Mar-2022 was 3,031 million GBP.

    As on 2022, SSE PLC had 10,754 employees.

    Company Website
    SSE PLC
    Wikipedia
    Wikipedia

  2. ACWA Power Company

    World Rank (Aug-2026)
    690
    Market Cap (Aug-2026)
    38.080 Billion USD
    World Rank (Jan-05-2024)
    365
    Market Cap (Jan-05-2024)
    47.258 Billion USD
    World Rank (Jul-30-2023)
    501
    Market Cap (Jul-30-2023)
    36.457 Billion USD
    World Rank (Dec-25-2022)
    581
    Market Cap (Dec-25-2022)
    29.088 Billion USD
    Annual Revenue in USD
    1,407 Million USD
    Annual Operating Income in USD
    522 Million USD
    Annual Net Income in USD
    411 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Saudi Arabia
    Company Profile

    ACWA POWER COMPANY is a developer, investor, co-owner and operator of a portfolio of power generation, renewable energy and desalinated water production plants. Headquarters is in Soudi Arabia and located in 10 countries.

    Company Website
    ACWA POWER COMPANY

  3. Public Service Enterprise Group

    World Rank (Aug-2026)
    696
    Market Cap (Aug-2026)
    37.900 Billion USD
    World Rank (Jan-05-2024)
    595
    Market Cap (Jan-05-2024)
    30.801 Billion USD
    World Rank (Jul-30-2023)
    602
    Market Cap (Jul-30-2023)
    31.525 Billion USD
    World Rank (Dec-25-2022)
    552
    Market Cap (Dec-25-2022)
    30.476 Billion USD
    World Rank (Jan-07-2022)
    614
    Market Cap (Jan-07-2022)
    33.88 Billion USD
    Annual Revenue in USD
    12,123 Million USD
    Annual Operating Income in USD
    2,980 Million USD
    Annual Net Income in USD
    2,111 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    CEO
    Ralph Izzo
    Stock Category
    S&P 500
    Yahoo @ NYSE
    Company Profile

    PUBLIC SERVICE ENTERPRISE GROUP is Electricity Generation, Electric Utility and Gas Utility company with headquarters is in USA.

    As on 2022, PUBLIC SERVICE ENTERPRISE GROUP has 12,525 employees.

    PUBLIC SERVICE ENTERPRISE GROUP annual revenue generated for period ending Dec-2022 was 9,800 million USD.

    PUBLIC SERVICE ENTERPRISE GROUP annual net income generated for period ending Dec-2022 was 1,031 million USD.

    Company Website
    PUBLIC SERVICE ENTERPRISE GROUP INCORPORATED
    Wikipedia
    Wikipedia

  4. WEC Energy Group

    World Rank (Aug-2026)
    733
    Market Cap (Aug-2026)
    36.013 Billion USD
    World Rank (Jan-05-2024)
    669
    Market Cap (Jan-05-2024)
    27.320 Billion USD
    World Rank (Jul-30-2023)
    669
    Market Cap (Jul-30-2023)
    28.408 Billion USD
    World Rank (Dec-25-2022)
    560
    Market Cap (Dec-25-2022)
    30.118 Billion USD
    World Rank (Jan-07-2022)
    690
    Market Cap (Jan-07-2022)
    30.66 Billion USD
    Annual Revenue in USD
    9,800 Million USD
    Annual Operating Income in USD
    2,245 Million USD
    Annual Net Income in USD
    1,556 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    CEO
    Scott J. Lauber
    Stock Category
    S&P 500
    Yahoo @ NYSE
    Company Profile

    Electricity and natural gas supplying company with headquarters is in Wisconsin, USA.

    As on 2022, WEC ENERGY GROUP has 7,022 employees.

    WEC ENERGY GROUP annual revenue generated for period ending Dec-2022 was 9,597 million USD.

    WEC ENERGY GROUP annual net income generated for period ending Dec-2022 was 1,408 million USD.

    Company Website
    WEC ENERGY GROUP INC
    Wikipedia
    Wikipedia

  5. CEZ A. S

    World Rank (Aug-2026)
    737
    Market Cap (Aug-2026)
    35.747 Billion USD
    World Rank (Jan-05-2024)
    786
    Market Cap (Jan-05-2024)
    23.331 Billion USD
    World Rank (Jul-30-2023)
    794
    Market Cap (Jul-30-2023)
    23.705 Billion USD
    World Rank (Dec-25-2022)
    938
    Market Cap (Dec-25-2022)
    17.786 Billion USD
    World Rank (Jan-07-2022)
    1,031
    Market Cap (Jan-07-2022)
    20.16 Billion USD
    Annual Revenue in USD
    16,931 Million USD
    Annual Operating Income in USD
    6,679 Million USD
    Annual Net Income in USD
    3,711 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Czech Republic
    CEO
    Daniel Benes
    Yahoo @ Frankfurt
    Company Profile

    CEZ A.S supplies electricity and gas to the households of CZech Republic at relatively low price. Headquarters is in Czech Republic.

    Company Website
    CEZ GROUP
    Wikipedia
    Wikipedia

  6. Repsol

    World Rank (Aug-2026)
    744
    Market Cap (Aug-2026)
    35.575 Billion USD
    World Rank (Jan-05-2024)
    986
    Market Cap (Jan-05-2024)
    18.391 Billion USD
    World Rank (Jul-30-2023)
    941
    Market Cap (Jul-30-2023)
    19.661 Billion USD
    World Rank (Dec-25-2022)
    770
    Market Cap (Dec-25-2022)
    21.691 Billion USD
    World Rank (Jan-07-2022)
    1,133
    Market Cap (Jan-07-2022)
    18.16 Billion USD
    Annual Revenue in USD
    82,860 Million USD
    Annual Operating Income in USD
    10,442 Million USD
    Annual Net Income in USD
    4,621 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Spain
    CEO
    Josu Jon Imaz
    Stock Category
    S&P EUROPE 350
    Yahoo @ Spain
    Company Profile

    Energy company with headquarters is in Madrid, Spain.

    Company Website
    REPSOL
    Wikipedia
    Wikipedia

  7. NTPC

    World Rank (Aug-2026)
    765
    Market Cap (Aug-2026)
    34.537 Billion USD
    World Rank (Jan-05-2024)
    499
    Market Cap (Jan-05-2024)
    36.709 Billion USD
    World Rank (Jul-30-2023)
    765
    Market Cap (Jul-30-2023)
    24.750 Billion USD
    World Rank (Dec-25-2022)
    860
    Market Cap (Dec-25-2022)
    19.467 Billion USD
    World Rank (Jan-07-2022)
    1,169
    Market Cap (Jan-07-2022)
    17.43 Billion USD
    Annual Revenue in USD
    21,420 Million USD
    Annual Operating Income in USD
    4,004 Million USD
    Annual Net Income in USD
    2,056 Million USD
    Annual Results for Period Ending
    Mar-2023 ending year
    Headquarters Country
    India
    CEO
    Gurdeep Singh
    Stock Category
    Nifty 50 Index
    BSE-100 Index
    S&P BSE INDIA INFRA
    S&P BSE POWER
    S&P BSE UTILITIES
    S&P BSE PSU
    S&P BSE CPSE
    Yahoo @ BSE
    Company Profile

    NTPC is India's Bigger Power Sector company with headquarters is in India and with Employee Count of 19,918 as on 2021. NTPC company generates and distributes electricity. It has businesses related to power trading, gas exploration and coal mining as well.

    As on 2021, NTPC total installed capacity of the company is 67,907.5 MW (including JVs) own stations include 24 coal based, 7 gas based, 1 Hydro 1 Wind 13 Solar and 1 Small hydro plant. Under JV, NTPC has 9 coal based, 4 gas based and 13 renewable energy projects.

    Company Website
    NTPC
    Wikipedia
    Wikipedia

  8. Naturgy Energy Group

    World Rank (Aug-2026)
    816
    Market Cap (Aug-2026)
    32.013 Billion USD
    World Rank (Jan-05-2024)
    640
    Market Cap (Jan-05-2024)
    28.695 Billion USD
    World Rank (Jul-30-2023)
    640
    Market Cap (Jul-30-2023)
    29.404 Billion USD
    World Rank (Dec-25-2022)
    663
    Market Cap (Dec-25-2022)
    25.557 Billion USD
    World Rank (Jan-07-2022)
    679
    Market Cap (Jan-07-2022)
    31.14 Billion USD
    Annual Revenue in USD
    37,448 Million USD
    Annual Operating Income in USD
    3,954 Million USD
    Annual Net Income in USD
    1,818 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Spain
    CEO
    Francisco Miguel Reynes Massanet
    Stock Category
    S&P EUROPE 350
    Yahoo @ Spain
    Company Profile

    NATURGY ENERGY GROUP is gas utility and electricity utility company. Headquarters is in Spain.

    Total Employees as on December 2022 is 7,112.

    Facts About Company

    Annual Revenues for period ending Dec-2022 is 33,965 Million EUR.

    Annual Net Loss for period ending Dec-2022 is 1,649 Million EUR.

    Annual Revenues was 15,345 Million EUR and Annual Net Loss was 1,214 Million EUR for period ending Dec-2021.

    Company Website
    NATURGY ENERGY GROUP
    Wikipedia
    Wikipedia

  9. Ameren Corporation

    World Rank (Aug-2026)
    861
    Market Cap (Aug-2026)
    30.381 Billion USD
    World Rank (Jan-05-2024)
    935
    Market Cap (Jan-05-2024)
    19.434 Billion USD
    World Rank (Jul-30-2023)
    830
    Market Cap (Jul-30-2023)
    22.540 Billion USD
    World Rank (Dec-25-2022)
    726
    Market Cap (Dec-25-2022)
    23.145 Billion USD
    World Rank (Jan-07-2022)
    922
    Market Cap (Jan-07-2022)
    22.73 Billion USD
    Annual Revenue in USD
    8,799 Million USD
    Annual Operating Income in USD
    2,026 Million USD
    Annual Net Income in USD
    1,461 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    CEO
    Warner L Baxter
    Stock Category
    S&P 500
    Yahoo @ NYSE
    Company Profile

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

    As on 2022, AMEREN CORPORATION has 5,600 employees.

    AMEREN CORPORATION annual revenue generated for period ending Dec-2022 was 7,957 million USD.

    AMEREN CORPORATION annual net income generated for period ending Dec-2022 was 1,074 million USD.

    Company Website
    AMEREN CORPORATION
    Wikipedia
    Wikipedia

  10. Gulf Energy Development Public Company

    World Rank (Aug-2026)
    881
    Market Cap (Aug-2026)
    29.242 Billion USD
    World Rank (Jan-05-2024)
    1,178
    Market Cap (Jan-05-2024)
    15.059 Billion USD
    World Rank (Jul-30-2023)
    1,068
    Market Cap (Jul-30-2023)
    17.126 Billion USD
    World Rank (Dec-25-2022)
    928
    Market Cap (Dec-25-2022)
    17.951 Billion USD
    World Rank (Jan-07-2022)
    1,260
    Market Cap (Jan-07-2022)
    16.12 Billion USD
    Annual Revenue in USD
    2,748 Million USD
    Annual Operating Income in USD
    499 Million USD
    Annual Net Income in USD
    333 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Thailand
    CEO
    Sarath Ratanavadi
    Yahoo @ Thailand
    Company Profile
    Gulf Energy Development Public company is a Energy Producers company. It's portfolio of electricity, steam and chilled water generating projects and other related business. It operate and develop a total gross installed power capacity of 11,910 MW. The company sell electricity to the electricity generating authority of Thailand and industrial users in industrial estates through independent power producer and small power producers programs and sell electricity to the provincial electricity authority through very small power producers program. The headquarters is in Thailand.
    Company Website
    GULF ENERGY DEVELOPMENT PUBLIC COMPANY

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