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. Keyera

    World Rank (Aug-2026)
    1,851
    Market Cap (Aug-2026)
    12.509 Billion USD
    World Rank (Jan-05-2024)
    2,729
    Market Cap (Jan-05-2024)
    5.476 Billion USD
    World Rank (Jul-30-2023)
    2,669
    Market Cap (Jul-30-2023)
    5.647 Billion USD
    World Rank (Dec-25-2022)
    2,741
    Market Cap (Dec-25-2022)
    4.956 Billion USD
    World Rank (Jan-07-2022)
    3,263
    Market Cap (Jan-07-2022)
    5.05 Billion USD
    Annual Revenue in USD
    5,329 Million USD
    Annual Operating Income in USD
    604 Million USD
    Annual Net Income in USD
    248 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Canada
    Yahoo @ Toronto
    Company Profile

    KEYERA provides services to Oil and Gas sector companies to store and transport oil and gas. This company provides essential services to oil and gas producers in the Western Canada Sedimentary Basin, including NGL gathering and processing, fractionation, storage, transportation, logistics and marketing services. They also provide diluent logistics services for oil sands customer. Headquarters is in Canada.

    Company Website
    KEYERA CORP.
    Wikipedia
    Wikipedia

  2. S-Oil Corporation

    World Rank (Aug-2026)
    1,867
    Market Cap (Aug-2026)
    12.353 Billion USD
    World Rank (Jan-05-2024)
    2,587
    Market Cap (Jan-05-2024)
    5.850 Billion USD
    World Rank (Jul-30-2023)
    2,343
    Market Cap (Jul-30-2023)
    6.590 Billion USD
    World Rank (Dec-25-2022)
    1,853
    Market Cap (Dec-25-2022)
    7.915 Billion USD
    World Rank (Jan-07-2022)
    1,997
    Market Cap (Jan-07-2022)
    9.32 Billion USD
    Annual Revenue in USD
    32,641 Million USD
    Annual Operating Income in USD
    2,619 Million USD
    Annual Net Income in USD
    1,618 Million USD
    Annual Results for Period Ending
    Dec-2022 ending period
    Headquarters Country
    South Korea
    Yahoo @ SouthKorea
    Company Profile
    Petroleum Refining, Petro Chemical Products Production, Lubricant Products is the core business of S-Oil. Headquarters is in South Korea.
    Company Website
    S-Oil
    Wikipedia
    Wikipedia

  3. Altagas

    World Rank (Aug-2026)
    1,931
    Market Cap (Aug-2026)
    11.853 Billion USD
    World Rank (Jan-05-2024)
    2,483
    Market Cap (Jan-05-2024)
    6.159 Billion USD
    World Rank (Jul-30-2023)
    2,726
    Market Cap (Jul-30-2023)
    5.514 Billion USD
    World Rank (Dec-25-2022)
    2,789
    Market Cap (Dec-25-2022)
    4.875 Billion USD
    World Rank (Jan-07-2022)
    2,906
    Market Cap (Jan-07-2022)
    5.83 Billion USD
    Annual Revenue in USD
    10,633 Million USD
    Annual Operating Income in USD
    701 Million USD
    Annual Net Income in USD
    301 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Canada
    Yahoo @ Toronto
    Company Profile

    AltaGas, a Canadian corporation, is a North American energy infrastructure business with a focus on owning and operating assets to provide clean and affordable energy to its customers. They had businesses in midstream and natural gas distribution. Headquarters is in Canada.

    Company Website
    ALTAGAS LTD.
    Wikipedia
    Wikipedia

  4. Antero Resources Corporation

    World Rank (Aug-2026)
    1,973
    Market Cap (Aug-2026)
    11.489 Billion USD
    World Rank (Jan-05-2024)
    2,270
    Market Cap (Jan-05-2024)
    6.843 Billion USD
    World Rank (Jul-30-2023)
    2,001
    Market Cap (Jul-30-2023)
    8.008 Billion USD
    World Rank (Dec-25-2022)
    1,511
    Market Cap (Dec-25-2022)
    10.184 Billion USD
    World Rank (Jan-07-2022)
    2,922
    Market Cap (Jan-07-2022)
    5.79 Billion USD
    Annual Revenue in USD
    5,137 Million USD
    Annual Operating Income in USD
    884 Million USD
    Annual Net Income in USD
    675 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile

    Antero Resources Corporation is an Independent Natural Gas and Oil company. It is engaged in the exploration, development and production of natural gas, NGLs and oil properties located in the Appalachian Basin. The headquarters is in USA.

    Company Website
    ANTERO RESOURCES CORPORATION

  5. Phillips 66 Partners Lp

    World Rank (Aug-2026)
    1,983
    World Rank (Jan-05-2024)
    1,983
    World Rank (Jul-30-2023)
    1,983
    World Rank (Dec-25-2022)
    1,983
    World Rank (Jan-07-2022)
    1,983
    Market Cap (Jan-07-2022)
    9.39 Billion USD
    Annual Revenue in USD
    1,146 Million USD
    Annual Net Income in USD
    735 Million USD
    Annual Results for Period Ending
    For year ending December-2021
    Headquarters Country
    USA
    Company Profile
    Phillips 66 Partners LP own, operate, develop and acquire primarily fee based crude oil, refined petroleum product and natural gas liquids pipelines and terminals and other transportation and midstream assets. The headquarters is in USA.
    Company Website
    PHILLIPS 66 PARTNERS LP

  6. Aker ASA

    World Rank (Aug-2026)
    1,988
    Market Cap (Aug-2026)
    11.405 Billion USD
    World Rank (Jan-05-2024)
    3,052
    Market Cap (Jan-05-2024)
    4.747 Billion USD
    World Rank (Jul-30-2023)
    3,102
    Market Cap (Jul-30-2023)
    4.746 Billion USD
    World Rank (Dec-25-2022)
    2,501
    Market Cap (Dec-25-2022)
    5.532 Billion USD
    World Rank (Jan-07-2022)
    2,508
    Market Cap (Jan-07-2022)
    7.03 Billion USD
    Annual Revenue in USD
    875 Million USD
    Annual Operating Income in USD
    980 Million USD
    Annual Net Income in USD
    1,282 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Norway
    Yahoo @ Oslo
    Company Profile
    Aker ASA is an Industrial Investment company. It's ownership interests concentrated in oil and gas, maritime assets and fishing, marine biotechnology and industrial software. The company had a total turnover of more than NOK 83 billion in 2019 and a workforce of approximately 37,000 employees including temporary hires. The headquarters is in Norway.
    Company Website
    AKER ASA

  7. Polskie Gornictwo Naftowe I Gazownictwo

    World Rank (Aug-2026)
    2,045
    World Rank (Jan-05-2024)
    2,045
    World Rank (Jul-30-2023)
    2,045
    World Rank (Dec-25-2022)
    2,045
    World Rank (Jan-07-2022)
    2,045
    Market Cap (Jan-07-2022)
    9.00 Billion USD
    Annual Revenue in USD
    14,692 Million USD
    Annual Net Income in USD
    1,263 Million USD
    Annual Results for Period Ending
    Dec-2021 ending year
    Headquarters Country
    Poland
    Company Profile
    Polskie Gornictwo Naftowe i Gazownictwo is a Natural Gas Market company. It engaged in the exploration and production of natural gas and crude oil, gas imports and through key companies, storage, sale and distribution of gaseous and liquid fuels and the production of heat and electricity. The company operating segments are exploration and extraction, trade and storage, distribution and production. The headquarters is in Poland.
    Company Website
    POLSKIE GORNICTWO NAFTOWE I GAZOWNICTWO

  8. KOC Holding

    World Rank (Aug-2026)
    2,046
    Market Cap (Aug-2026)
    10.947 Billion USD
    World Rank (Jan-05-2024)
    1,428
    Market Cap (Jan-05-2024)
    11.986 Billion USD
    World Rank (Jul-30-2023)
    1,375
    Market Cap (Jul-30-2023)
    12.622 Billion USD
    World Rank (Dec-25-2022)
    1,456
    Market Cap (Dec-25-2022)
    10.690 Billion USD
    World Rank (Jan-07-2022)
    2,831
    Market Cap (Jan-07-2022)
    5.99 Billion USD
    Annual Revenue in USD
    33,459 Million USD
    Annual Operating Income in USD
    5,413 Million USD
    Annual Net Income in USD
    2,590 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Turkiye
    Yahoo @ Turkey
    Company Profile

    KOC HOLDING is a conglomerate company and has business in Energy, Automotive, Consumer Durables, Finance. Headquarters is in Istanbul, Turkey.

    Company Website
    KOC HOLDING
    Wikipedia
    Wikipedia

  9. Subsea 7

    World Rank (Aug-2026)
    2,073
    Market Cap (Aug-2026)
    10.771 Billion USD
    World Rank (Jan-05-2024)
    3,250
    Market Cap (Jan-05-2024)
    4.389 Billion USD
    World Rank (Jul-30-2023)
    3,570
    Market Cap (Jul-30-2023)
    3.961 Billion USD
    World Rank (Dec-25-2022)
    3,834
    Market Cap (Dec-25-2022)
    3.288 Billion USD
    World Rank (Jan-07-2022)
    5,790
    Market Cap (Jan-07-2022)
    2.27 Billion USD
    Annual Revenue in USD
    5,010 Million USD
    Annual Net Income in USD
    31 Million USD
    Annual Results for Period Ending
    Dec-2021 ending year
    Headquarters Country
    UK
    Yahoo @ Norway
    Company Profile

    Subsea 7 is a Engineering Services company. It reputation as a collaborative service provider in long lasting client relationships makes one of the most trusted contractors in market which includes oil and gas and renewable energy. The company offshore operations span five decades successfully completing over 1000+ projects. The headquarters is in UK.

    Facts About Company

    Subsea 7 annual revenue was 5,135 million USD and annual net income was 57 million USD generated for period year ending Dec-2022.

    Subsea 7 annual revenue was 5,010 million USD and annual net income was 31 million USD generated for period year ending Dec-2021.

    As on 2022, Subsea 7 had 6,691 employees.

    Company Website
    SUBSEA 7

  10. Antero Midstream Corporation

    World Rank (Aug-2026)
    2,087
    Market Cap (Aug-2026)
    10.704 Billion USD
    World Rank (Jan-05-2024)
    2,532
    Market Cap (Jan-05-2024)
    6.020 Billion USD
    World Rank (Jul-30-2023)
    2,654
    Market Cap (Jul-30-2023)
    5.684 Billion USD
    World Rank (Dec-25-2022)
    2,638
    Market Cap (Dec-25-2022)
    5.211 Billion USD
    World Rank (Jan-07-2022)
    3,345
    Market Cap (Jan-07-2022)
    4.88 Billion USD
    Annual Revenue in USD
    1,188 Million USD
    Annual Operating Income in USD
    645 Million USD
    Annual Net Income in USD
    413 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile

    Antero Midstream Corporation is a Natural Gas and Liquids Platform company. It is having over 300 miles of gathering pipeline and 1.0 Bcf/d processing capacity and over 275 miles of fresh water pipeline and 60,000 Bbl/d wastewater treatment capacity. The headquarters is in USA.

    Company Website
    ANTERO MIDSTREAM CORPORATION

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