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

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

World Top Energy Companies in 2026
World Largest Energy Companies by Market Cap 2026, World Top Energy Companies by Market Cap in 2026.

  1. Indian Oil Corporation

    World Rank (Aug-2026)
    1,217
    Market Cap (Aug-2026)
    20.563 Billion USD
    World Rank (Jan-05-2024)
    825
    Market Cap (Jan-05-2024)
    22.273 Billion USD
    World Rank (Jul-30-2023)
    1,116
    Market Cap (Jul-30-2023)
    16.362 Billion USD
    World Rank (Dec-25-2022)
    1,256
    Market Cap (Dec-25-2022)
    12.691 Billion USD
    World Rank (Jan-07-2022)
    1,356
    Market Cap (Jan-07-2022)
    14.95 Billion USD
    Annual Revenue in USD
    102,320 Million USD
    Annual Operating Income in USD
    2,213 Million USD
    Annual Net Income in USD
    1,190 Million USD
    Annual Results for Period Ending
    Mar-2023 ending year
    Headquarters Country
    India
    Stock Category
    BSE-100 Index
    S&P BSE OIL and GAS
    S&P BSE PSU
    S&P BSE CPSE
    S&P BSE ENERGY
    Yahoo @ BSE
    Company Profile

    Indian Oil Corporation is State-Owned Oil and Gas company with headquarters is in New Delhi of India. Exploring, Refining, Pipe Line Transportation and Marketing of Oil and Gas related products is core business of IOC. It had more than 10 oil refineries. Markets petrol and diesel through its petrol outlets which are present across India. Headquarters is in India.

    Servo engine oil brand belongs to IOCL.

    It is pursuing diverse business interests with the setting up of over 15 joint ventures with reputed business partners from India.

    Facts About Company

    As on 2024, Indian Oil Corporation has 30,439 employees.

    As of March-2023, it has 11 refineries with 80.60 MMTPA Capacity.

    As of March-2023, it has 17,000 km pipelines for crude oil and products with a total capacity of 119.2 MMTPA.

    It has 1,554 effective patents as on 31-Mar-2023

    As of March-2023, it has 36,285 retail outlets.

    Company Website
    Indian Oil Corporation Limited
    Wikipedia
    Wikipedia

  2. EDP - Energias de Portugal

    World Rank (Aug-2026)
    1,219
    Market Cap (Aug-2026)
    20.504 Billion USD
    World Rank (Jan-05-2024)
    883
    Market Cap (Jan-05-2024)
    20.728 Billion USD
    World Rank (Jul-30-2023)
    880
    Market Cap (Jul-30-2023)
    21.080 Billion USD
    World Rank (Dec-25-2022)
    837
    Market Cap (Dec-25-2022)
    19.796 Billion USD
    World Rank (Jan-07-2022)
    1,017
    Market Cap (Jan-07-2022)
    20.44 Billion USD
    Annual Revenue in USD
    22,768 Million USD
    Annual Operating Income in USD
    1,622 Million USD
    Annual Net Income in USD
    749 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Portugal
    CEO
    Joao Manuel Brito Martins
    Stock Category
    EURONEXT 100
    S&P EUROPE 350
    Yahoo @ Lisbon
    Company Profile

    EDP is a Electric Utility company with headquarters is in Portugal. It is being present in 20 countries and 4 continents.

    Company Website
    EDP
    Wikipedia
    Wikipedia

  3. 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
    5,850 Million USD
    Annual Operating Income in USD
    1,161 Million USD
    Annual Net Income in USD
    749 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    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

  4. Western Midstream Partners Lp

    World Rank (Aug-2026)
    1,231
    Market Cap (Aug-2026)
    20.213 Billion USD
    World Rank (Jan-05-2024)
    1,538
    Market Cap (Jan-05-2024)
    10.885 Billion USD
    World Rank (Jul-30-2023)
    1,585
    Market Cap (Jul-30-2023)
    10.808 Billion USD
    World Rank (Dec-25-2022)
    1,541
    Market Cap (Dec-25-2022)
    9.923 Billion USD
    World Rank (Jan-07-2022)
    1,970
    Market Cap (Jan-07-2022)
    9.50 Billion USD
    Annual Revenue in USD
    3,251 Million USD
    Annual Operating Income in USD
    1,321 Million USD
    Annual Net Income in USD
    1,189 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile

    Western Midstream provides high-quality midstream service providing Natural gas processing, compressing and transportation company. Headquarters is in Texas, USA.

    Company Website
    WESTERN GAS PARTNERS LP

  5. Galp Energia Sgps

    World Rank (Aug-2026)
    1,240
    Market Cap (Aug-2026)
    20.006 Billion USD
    World Rank (Jan-05-2024)
    1,441
    Market Cap (Jan-05-2024)
    11.878 Billion USD
    World Rank (Jul-30-2023)
    1,723
    Market Cap (Jul-30-2023)
    9.669 Billion USD
    World Rank (Dec-25-2022)
    1,419
    Market Cap (Dec-25-2022)
    11.036 Billion USD
    World Rank (Jan-07-2022)
    2,080
    Market Cap (Jan-07-2022)
    8.81 Billion USD
    Annual Revenue in USD
    29,591 Million USD
    Annual Operating Income in USD
    2,645 Million USD
    Annual Net Income in USD
    1,626 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Portugal
    Stock Category
    EURONEXT 100
    S&P EUROPE 350
    Yahoo @ Lisbon
    Company Profile
    GALP ENERGIA SGPS is a Portugal based holding company engaged in the oil and gas industry, transport, storage, regasification, distribution. The products of the company are oil and gas exploration and production, natural gas transportation and distribution, oil refining, electricity generation. Activities are divided into three business segments: exploration and production; refining and marketing, and gas and power. The headquarters is in Portugal. 
    Company Website
    GALP ENERGIA-NOM
    Wikipedia
    Wikipedia

  6. YPF Sociedad Anonima

    World Rank (Aug-2026)
    1,257
    Market Cap (Aug-2026)
    19.685 Billion USD
    World Rank (Jan-05-2024)
    2,358
    Market Cap (Jan-05-2024)
    6.567 Billion USD
    World Rank (Jul-30-2023)
    1,480
    Market Cap (Jul-30-2023)
    11.637 Billion USD
    World Rank (Dec-25-2022)
    3,585
    Market Cap (Dec-25-2022)
    3.575 Billion USD
    World Rank (Jan-07-2022)
    7,202
    Market Cap (Jan-07-2022)
    1.59 Billion USD
    Annual Revenue in USD
    9,076 Million USD
    Annual Operating Income in USD
    1,050 Million USD
    Annual Net Income in USD
    1,056 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Argentina
    Yahoo @ NYSE
    Company Profile

    YPF SOCIEDAD ANONIMA is Oil and Gas Exploration, Petroleum Refining Company with headquarters is in Argentina.

    Company Website
    YPF SOCIEDAD ANONIMA
    Wikipedia
    Wikipedia

  7. Santos

    World Rank (Aug-2026)
    1,263
    Market Cap (Aug-2026)
    19.586 Billion USD
    World Rank (Jan-05-2024)
    1,077
    Market Cap (Jan-05-2024)
    16.588 Billion USD
    World Rank (Jul-30-2023)
    1,066
    Market Cap (Jul-30-2023)
    17.159 Billion USD
    World Rank (Dec-25-2022)
    1,034
    Market Cap (Dec-25-2022)
    16.034 Billion USD
    World Rank (Jan-07-2022)
    1,233
    Market Cap (Jan-07-2022)
    16.51 Billion USD
    Annual Revenue in USD
    7,790 Million USD
    Annual Operating Income in USD
    3,290 Million USD
    Annual Net Income in USD
    2,112 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Australia
    CEO
    Kevin Gallagher
    Stock Category
    ASX 100
    Australia ADRs
    Yahoo @ ASX
    Company Profile

    Santos is one of the leading independent oil and gas producers in the Asia-Pacific region, supplying the energy needs of homes, businesses and major industries across Australia and Asia. Headquarters is in Australia.

    Facts About Company

    As on Dec-2022, Santos has Annual Revenue is 7,790 million AUD and net income was 2,112 million AUD.

    As on Dec-2021, Santos has Annual Revenue is 4,713 million AUD and net income was 658 million AUD.

    As on 2022, Santos had 3,550 employees.

    Company Website
    SANTOS LIMITED - Oil and Gas Producer Company
    Wikipedia
    Wikipedia

  8. Evergy

    World Rank (Aug-2026)
    1,273
    Market Cap (Aug-2026)
    19.375 Billion USD
    World Rank (Jan-05-2024)
    1,398
    Market Cap (Jan-05-2024)
    12.375 Billion USD
    World Rank (Jul-30-2023)
    1,284
    Market Cap (Jul-30-2023)
    13.815 Billion USD
    World Rank (Dec-25-2022)
    1,116
    Market Cap (Dec-25-2022)
    14.539 Billion USD
    World Rank (Jan-07-2022)
    1,306
    Market Cap (Jan-07-2022)
    15.49 Billion USD
    Annual Revenue in USD
    5,859 Million USD
    Annual Operating Income in USD
    1,302 Million USD
    Annual Net Income in USD
    752 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    USA
    CEO
    Terry D Bassham
    Stock Category
    S&P 500
    Yahoo @ NYSE
    Company Profile

    Electricity Utility company with headquarters is in USA. Company products are Electricity generation Electric power transmission Electricity distribution.

    As on 2022, EVERGY has 4,512 employees.

    As on 2022, EVERGY generating 4.4 GB Renewable Generation Added Since 2005.

    EVERGY revenue generating for the period of ending 2022 was 5,859 million USD.

    EVERGY Net Income was generating for the period of ending 2022 was 752 million USD.

    Company Website
    EVERGY INC
    Wikipedia
    Wikipedia

  9. Saudi Electricity Company

    World Rank (Aug-2026)
    1,303
    Market Cap (Aug-2026)
    18.788 Billion USD
    World Rank (Jan-05-2024)
    847
    Market Cap (Jan-05-2024)
    21.555 Billion USD
    World Rank (Jul-30-2023)
    747
    Market Cap (Jul-30-2023)
    25.155 Billion USD
    World Rank (Dec-25-2022)
    664
    Market Cap (Dec-25-2022)
    25.555 Billion USD
    World Rank (Jan-07-2022)
    774
    Market Cap (Jan-07-2022)
    26.93 Billion USD
    Annual Revenue in USD
    19,221 Million USD
    Annual Operating Income in USD
    4,506 Million USD
    Annual Net Income in USD
    1,993 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Saudi Arabia
    CEO
    Fahad bin Hussein Al-Sudairi
    Yahoo @ SaudiArabia
    Company Profile

    Saudi Electricity Company (SECO) is Electric utility company with headquarters is in Riyadh, Saudi Arabia. Company generates electricity and distributes electricity. It is the leading producer of electricity and sole owner of the entire transmission and distribution network throughout the Kingdom, serving all types of customers.

    SECO managing 37,000 megawatts of power across some 45 plants.

    Company Website
    SAUDI ELECTRICITY COMPANY
    Wikipedia
    Wikipedia

  10. Transneft

    World Rank (Aug-2026)
    1,319
    World Rank (Jan-05-2024)
    1,319
    World Rank (Jul-30-2023)
    1,319
    World Rank (Dec-25-2022)
    1,319
    World Rank (Jan-07-2022)
    1,319
    Market Cap (Jan-07-2022)
    15.31 Billion USD
    Annual Revenue in USD
    15,816 Million USD
    Annual Net Income in USD
    2,189 Million USD
    Annual Results for Period Ending
    Dec-2021 ending year
    Headquarters Country
    Russia
    Company Profile
    Transneft is oil and gas pipeline transport company with headquarters is in Moscow, Russia.
    Company Website
    TRANSNEFT
    Wikipedia
    Wikipedia

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