World Top 100 Oil and Gas Companies List by Market Cap as of August 2026

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

World Top Oil and Gas Companies in 2026
World Top Oil and Gas Companies by Market Cap in 2026, World Largest Oil and Gas Companies by Market Cap in 2026.

  1. 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
    3,842 Million USD
    Annual Operating Income in USD
    1,601 Million USD
    Annual Net Income in USD
    1,181 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    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

  2. 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

  3. 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

  4. 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

  5. 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

  6. Magellan Midstream Partners

    World Rank (Aug-2026)
    1,320
    World Rank (Jan-05-2024)
    1,320
    World Rank (Jul-30-2023)
    1,320
    Market Cap (Jul-30-2023)
    13.284 Billion USD
    World Rank (Dec-25-2022)
    1,500
    Market Cap (Dec-25-2022)
    10.282 Billion USD
    World Rank (Jan-07-2022)
    1,859
    Market Cap (Jan-07-2022)
    10.15 Billion USD
    Annual Revenue in USD
    2,916 Million USD
    Annual Operating Income in USD
    1,108 Million USD
    Annual Net Income in USD
    1,036 Million USD
    Annual Results for Period Ending
    For year ending December-2022
    Headquarters Country
    USA
    Company Profile

    Magellan Midstream Partners company provides Fund management services and investment management services. Headquarters is in Australia.

    On Sep-25-2023, ONEOK announced that it has completed its acquisition of Magellan Midstream Partners.

    Company Website
    Magellan Financial Group Limited
    Wikipedia
    Wikipedia

  7. Grupo Carso

    World Rank (Aug-2026)
    1,339
    Market Cap (Aug-2026)
    18.230 Billion USD
    World Rank (Jan-05-2024)
    780
    Market Cap (Jan-05-2024)
    23.556 Billion USD
    World Rank (Jul-30-2023)
    1,010
    Market Cap (Jul-30-2023)
    17.981 Billion USD
    World Rank (Dec-25-2022)
    1,528
    Market Cap (Dec-25-2022)
    10.051 Billion USD
    World Rank (Jan-07-2022)
    2,573
    Market Cap (Jan-07-2022)
    6.76 Billion USD
    Annual Revenue in USD
    10,877 Million USD
    Annual Operating Income in USD
    1,426 Million USD
    Annual Net Income in USD
    1,142 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Mexico
    Yahoo @ Mexico
    Company Profile
    Grupo Carso is a Diversified Conglomerates company.  They have 60,000 employees as on 2019. The company is made up of four sectors that have been defined as strategic they are the commercial sector, the industrial sector, the infrastructure and construction sector and the energy sector. The headquarters is in Mexico.
    Company Website
    GRUPO CARSO
    Wikipedia
    Wikipedia

  8. PTT Exploration and Production Public Company

    World Rank (Aug-2026)
    1,348
    Market Cap (Aug-2026)
    18.172 Billion USD
    World Rank (Jan-05-2024)
    1,039
    Market Cap (Jan-05-2024)
    17.250 Billion USD
    World Rank (Jul-30-2023)
    985
    Market Cap (Jul-30-2023)
    18.485 Billion USD
    World Rank (Dec-25-2022)
    854
    Market Cap (Dec-25-2022)
    19.561 Billion USD
    World Rank (Jan-07-2022)
    1,381
    Market Cap (Jan-07-2022)
    14.62 Billion USD
    Annual Revenue in USD
    9,429 Million USD
    Annual Operating Income in USD
    4,610 Million USD
    Annual Net Income in USD
    2,027 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Thailand
    CEO
    Phongsthorn Thavisin
    Stock Category
    Thailand ADRs
    Yahoo @ Thailand
    Company Profile

    PTT EXPLORATION AND PRODUCTION PUBLIC COMPANY is a national petroleum exploration and production company. The company operates three business segments: Oil and gas exploration and production, overseas pipelines and investment in projects strategically connected to the energy business. It is a subsidiary of the state owned PTT public company limited. The headquarters is in Thailand.

    Company Website
    PTT EXPLORATION AND PRODUCTION PUBLIC COMPANY
    Wikipedia
    Wikipedia

  9. Permian Resources Corporation

    World Rank (Aug-2026)
    1,361
    Market Cap (Aug-2026)
    18.007 Billion USD
    World Rank (Jan-05-2024)
    1,562
    Market Cap (Jan-05-2024)
    10.681 Billion USD
    World Rank (Jul-30-2023)
    2,426
    Market Cap (Jul-30-2023)
    6.326 Billion USD
    World Rank (Dec-25-2022)
    2,629
    Market Cap (Dec-25-2022)
    5.232 Billion USD
    Annual Revenue in USD
    5,065 Million USD
    Annual Operating Income in USD
    1,463 Million USD
    Annual Net Income in USD
    935 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Company Profile

    PERMIAN RESOURCES CORPORATION is an independent oil and natural gas company, focuses on the development of crude oil and related liquids-rich natural gas reserves in the United States. PERMIAN RESOURCES CORPORATION Resources is the largest pure-play E&P company in the Delaware Basin. Headquarters is in USA.

    Company Website
    PERMIAN RESOURCES CORPORATION

  10. Hengli Petrochemical

    World Rank (Aug-2026)
    1,372
    Market Cap (Aug-2026)
    17.874 Billion USD
    World Rank (Jan-05-2024)
    1,347
    Market Cap (Jan-05-2024)
    12.932 Billion USD
    World Rank (Jul-30-2023)
    1,192
    Market Cap (Jul-30-2023)
    15.155 Billion USD
    World Rank (Dec-25-2022)
    1,032
    Market Cap (Dec-25-2022)
    16.071 Billion USD
    World Rank (Jan-07-2022)
    792
    Market Cap (Jan-07-2022)
    26.58 Billion USD
    Annual Revenue in USD
    31,109 Million USD
    Annual Operating Income in USD
    1,370 Million USD
    Annual Net Income in USD
    324 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    China
    Yahoo @ Shanghai
    Company Profile
    Oil and Gas, Petro Chemical company with headquarters is in China.
    Company Website
    HENGLI PETRO

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