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. Hong Kong and China Gas Company

    World Rank (Aug-2026)
    1,373
    Market Cap (Aug-2026)
    17.849 Billion USD
    World Rank (Jan-05-2024)
    1,244
    Market Cap (Jan-05-2024)
    14.144 Billion USD
    World Rank (Jul-30-2023)
    1,136
    Market Cap (Jul-30-2023)
    15.981 Billion USD
    World Rank (Dec-25-2022)
    948
    Market Cap (Dec-25-2022)
    17.598 Billion USD
    World Rank (Jan-07-2022)
    721
    Market Cap (Jan-07-2022)
    28.99 Billion USD
    Annual Revenue in USD
    7,815 Million USD
    Annual Operating Income in USD
    1,041 Million USD
    Annual Net Income in USD
    673 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Hong Kong
    Yahoo @ HongKong
    Company Profile
    Gas Supply and Water Supply Utility company with headquarters is in HongKong.
    Company Website
    Hong Kong and China Gas Company
    Wikipedia
    Wikipedia

  2. Ovintiv Inc.

    World Rank (Aug-2026)
    1,376
    Market Cap (Aug-2026)
    17.816 Billion USD
    World Rank (Jan-05-2024)
    1,420
    Market Cap (Jan-05-2024)
    12.107 Billion USD
    World Rank (Jul-30-2023)
    1,393
    Market Cap (Jul-30-2023)
    12.514 Billion USD
    World Rank (Dec-25-2022)
    1,234
    Market Cap (Dec-25-2022)
    12.946 Billion USD
    World Rank (Jan-07-2022)
    1,908
    Market Cap (Jan-07-2022)
    9.87 Billion USD
    Annual Revenue in USD
    12,464 Million USD
    Annual Operating Income in USD
    3,854 Million USD
    Annual Net Income in USD
    3,637 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Canada
    Company Profile

    Ovintiv is the producers of oil, condensate, natural gas and natural gas liquids company in North America. The headquarters is in Canada.

    Company Website
    OVINTIV INC.

  3. Tourmaline Oil

    World Rank (Aug-2026)
    1,390
    Market Cap (Aug-2026)
    17.598 Billion USD
    World Rank (Jan-05-2024)
    1,127
    Market Cap (Jan-05-2024)
    15.824 Billion USD
    World Rank (Jul-30-2023)
    1,046
    Market Cap (Jul-30-2023)
    17.527 Billion USD
    World Rank (Dec-25-2022)
    942
    Market Cap (Dec-25-2022)
    17.752 Billion USD
    World Rank (Jan-07-2022)
    1,704
    Market Cap (Jan-07-2022)
    11.27 Billion USD
    Annual Revenue in USD
    6,549 Million USD
    Annual Operating Income in USD
    3,434 Million USD
    Annual Net Income in USD
    3,387 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Canada
    Stock Category
    TSX 60
    Yahoo @ Toronto
    Company Profile

    Tourmaline Oil is Oil and Gas company with headquarters is in Calgary, Canada.

    Facts About Company

    For year ending Dec-2022, Tourmaline Oil annual revenue was 8,677 million CAD and annual net income was 4,487 million CAD.

    For year ending Dec-2021, Tourmaline Oil annual revenue was 5,121 million CAD and annual net income was 2,025 million CAD.

    As on 2020, Tourmaline Oil had 225 employees.

    Company Website
    TOURMALINE OIL CORP.

  4. Hollyfrontier Corporation

    World Rank (Aug-2026)
    1,397
    World Rank (Jan-05-2024)
    3,053
    World Rank (Jul-30-2023)
    3,053
    World Rank (Dec-25-2022)
    3,053
    World Rank (Jan-07-2022)
    3,053
    Market Cap (Jan-07-2022)
    5.47 Billion USD
    Annual Revenue in USD
    18,389 Million USD
    Annual Operating Income in USD
    749 Million USD
    Annual Net Income in USD
    558 Million USD
    Annual Results for Period Ending
    For year ending December-2021
    Headquarters Country
    USA
    Company Profile

    HollyFrontier Corporation is a Petroleum, Oil and Gas company. The Company products are gasoline, diesel, jet fuel, asphalt, aircrafts, trains, vacuum tower bottoms, carbon black oil, roofing flux, zero pen asphalt and other specialty products. The headquarters is in USA.

    Company Website
    HOLLYFRONTIER CORPORATION
    Wikipedia
    Wikipedia

  5. SNGN Romgaz SA

    World Rank (Aug-2026)
    1,423
    Market Cap (Aug-2026)
    17.026 Billion USD
    World Rank (Jan-05-2024)
    3,340
    Market Cap (Jan-05-2024)
    4.240 Billion USD
    World Rank (Jul-30-2023)
    3,960
    Market Cap (Jul-30-2023)
    3.445 Billion USD
    World Rank (Dec-25-2022)
    3,775
    Market Cap (Dec-25-2022)
    3.345 Billion USD
    World Rank (Jan-07-2022)
    4,649
    Market Cap (Jan-07-2022)
    3.17 Billion USD
    Annual Revenue in USD
    1,306 Million USD
    Annual Net Income in USD
    423 Million USD
    Annual Results for Period Ending
    Dec-2021 ending year
    Headquarters Country
    Romania
    Yahoo @ Frankfurt
    Company Profile

    SNGN Romgaz SA company is producer and main supplier of natural gas. The headquarters is in Romania.

    Company Website
    SNGN ROMGAZ SA

  6. Plains All American Pipeline

    World Rank (Aug-2026)
    1,435
    Market Cap (Aug-2026)
    16.863 Billion USD
    World Rank (Jan-05-2024)
    1,549
    Market Cap (Jan-05-2024)
    10.802 Billion USD
    World Rank (Jul-30-2023)
    1,641
    Market Cap (Jul-30-2023)
    10.294 Billion USD
    World Rank (Dec-25-2022)
    1,808
    Market Cap (Dec-25-2022)
    8.177 Billion USD
    World Rank (Jan-07-2022)
    2,474
    Market Cap (Jan-07-2022)
    7.16 Billion USD
    Annual Revenue in USD
    44,262 Million USD
    Annual Operating Income in USD
    1,434 Million USD
    Annual Net Income in USD
    1,435 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile

    PLAINS ALL AMERICAN PIPELINE is involved in intrastate crude oil pipeline transportation and terminal storage activities. The company is operates in three segments: transportation, facilities, and supply and logistics. By this segments the company is engaged in transportation, storage, terminating and marketing of crude oil, NGL and natural gas. The headquarters is in USA.

    Company Website
    PLAINS ALL AMERICAN PIPELINE L.P.
    Wikipedia
    Wikipedia

  7. HF Sinclair Corporation

    World Rank (Aug-2026)
    1,445
    Market Cap (Aug-2026)
    16.653 Billion USD
    World Rank (Jan-05-2024)
    1,503
    Market Cap (Jan-05-2024)
    11.242 Billion USD
    World Rank (Jul-30-2023)
    1,815
    Market Cap (Jul-30-2023)
    9.083 Billion USD
    World Rank (Dec-25-2022)
    1,815
    World Rank (Jan-07-2022)
    1,815
    Annual Revenue in USD
    26,869 Million USD
    Annual Operating Income in USD
    927 Million USD
    Annual Net Income in USD
    579 Million USD
    Annual Results for Period Ending
    For year ending December-2025
    Headquarters Country
    USA
    Yahoo @ NYSE
    Company Profile

    HF Sinclair Corporation is a Oil and Gas refining and marketing company with headquarters is in USA.

    It produces and markets fuel, gasoline, jet fuel, diesel and it operates refineries.

    Company Website
    HF SINCLAIR CORPORATION

  8. Turkiye Petrol Rafinerileri

    World Rank (Aug-2026)
    1,469
    Market Cap (Aug-2026)
    16.307 Billion USD
    World Rank (Jan-05-2024)
    1,771
    Market Cap (Jan-05-2024)
    9.226 Billion USD
    World Rank (Jul-30-2023)
    2,196
    Market Cap (Jul-30-2023)
    7.193 Billion USD
    World Rank (Dec-25-2022)
    1,993
    Market Cap (Dec-25-2022)
    7.242 Billion USD
    World Rank (Jan-07-2022)
    4,451
    Market Cap (Jan-07-2022)
    3.38 Billion USD
    Annual Revenue in USD
    16,575 Million USD
    Annual Operating Income in USD
    1,873 Million USD
    Annual Net Income in USD
    1,412 Million USD
    Annual Results for Period Ending
    Dec-2022 ending period
    Headquarters Country
    Turkiye
    Yahoo @ Turkey
    Company Profile
    Turkiye Petrol Rafinerileri is a Oil Processing Capacity company. The company spent a total of TL 311.5 million in R&D environmental management and investment in 2019. The headquarters is in Turkey.
    Company Website
    TURKIYE PETROL RAFINERILERI

  9. Whitecap Resources

    World Rank (Aug-2026)
    1,485
    Market Cap (Aug-2026)
    16.037 Billion USD
    World Rank (Jan-05-2024)
    3,446
    Market Cap (Jan-05-2024)
    4.082 Billion USD
    World Rank (Jul-30-2023)
    3,056
    Market Cap (Jul-30-2023)
    4.836 Billion USD
    World Rank (Dec-25-2022)
    2,871
    Market Cap (Dec-25-2022)
    4.721 Billion USD
    World Rank (Jan-07-2022)
    3,911
    Market Cap (Jan-07-2022)
    3.99 Billion USD
    Annual Revenue in USD
    3,608 Million USD
    Annual Operating Income in USD
    1,352 Million USD
    Annual Net Income in USD
    1,265 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    Canada
    Yahoo @ Toronto
    Company Profile

    Whitecap Resources is a Gas and Oil Weighted Growth company. It operates in three ways they are core areas, reserve information and marketing. The energy industry is using technology and innovation to reduce greenhouse gas emissions intensity and fresh water use while restoring their land base. It is the third largest oil production company. The headquarters is in Canada.

    Company Website
    WHITECAP RESOURCES

  10. SK Innovation

    World Rank (Aug-2026)
    1,520
    Market Cap (Aug-2026)
    15.668 Billion USD
    World Rank (Jan-05-2024)
    1,686
    Market Cap (Jan-05-2024)
    9.771 Billion USD
    World Rank (Jul-30-2023)
    1,336
    Market Cap (Jul-30-2023)
    13.130 Billion USD
    World Rank (Dec-25-2022)
    1,452
    Market Cap (Dec-25-2022)
    10.720 Billion USD
    World Rank (Jan-07-2022)
    1,183
    Market Cap (Jan-07-2022)
    17.21 Billion USD
    Annual Revenue in USD
    61,275 Million USD
    Annual Operating Income in USD
    3,075 Million USD
    Annual Net Income in USD
    1,232 Million USD
    Annual Results for Period Ending
    Dec-2022 ending year
    Headquarters Country
    South Korea
    CEO
    Kim Jun
    Yahoo @ SouthKorea
    Company Profile

    SK INNOVATION is Energy and Petrochemical Company, Petroleum Refining, Oil and Gas Exploration company. Headquarters is in South Korea.

    Company Website
    SK Innovation
    Wikipedia
    Wikipedia

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