World Top 100 Oil or Gas Pipeline Transport Companies List by Market Cap as of August 2026

Saudi Aramco is oil and gas exploration, refinery and trading company. Saudi Aramco is the world’s largest integrated oil and gas company having both upstream and downstream operations, producing the energy and chemicals. Headquarters is in Saudi Arabia.

As of August 2, 2026, Saudi Aramco had a market capitalization of approximately 1,705 billion USD (1.71 trillion USD).

As on Jan-05-2024, Saudi Aramco market capitalization was 2,132 billion USD and it is World 3rd largest company by market capitalization.

Williams Companies is an energy infrastructure company focused on connecting North America’s significant hydrocarbon resource plays to growing markets for natural gas and natural gas liquids (NGLs). Williams’ interstate gas pipeline and gathering & processing operations span the United States, including strategic assets in the deep water Gulf of Mexico, the Rockies, the Pacific Northwest and the Eastern Seaboard.

Williams owns and operates midstream gathering and processing assets, and interstate natural gas pipelines.

Core operations include transportation, storage and terminalling for natural gas, crude oil, NGLs, refined products and liquid natural gas. Headquarters is in Texas, USA.

Energy Transfer acquired Enable Midstream Partners for 7 Billion USD as on Feb-2021.

TC Energy Corporation business is supply of natural gas and crude oil through pipelines and generates electricity. Headquarters is in Calgary, Canada.

MPLX owns and operates midstream energy infrastructure and logistics assets, and provides fuels distribution services. MPLX's assets include a network of crude oil and refined product pipelines; an inland marine business; light-product terminals; storage caverns; refinery tanks, docks, loading racks, and associated piping; and crude and light-product marine terminals. The company also owns crude oil and natural gas gathering systems and pipelines as well as natural gas and NGL processing and fractionation facilities in key U.S. supply basins.

Pembina Pipeline Corporation is Canada based company and the company own a system of pipelines that transport crude oil, natural gas and natural gas liquids produced primarily in western Canada, as well as gas gathering and processing facilities and an oil and natural gas liquids infrastructure and logistics business.

Gazprom is Russia's biggest Oil and Gas Company. Gazprom is a global energy company focused on geological exploration, production, transportation, storage, processing and sales of gas, gas condensate and oil, sales of gas as a vehicle fuel, as well as generation and marketing of heat and electric power. Headquarters is in Russia.

OMV Group is oil and gas sector company with headquarters is in Austria.

OMV Group has business in both upstream and downstream:

Upstream Business : Exploration of oil and gas

and

Downstream Business : Refineries, Filling Stations, Gas Supply, marketing and trading, Gas Logistics.

As on 2019, OMV Group has 20,000 employees.

Daily average production was 487,000 boe/d in 2019.

The Company operates about 2,100 filling stations in ten European countries.

OMV Group operates 3 refineries in Europe.

LOEWS CORPORATION is Conglomerate company with businesses in financial services, insurance, oil drilling, oil and gas pipeline transport, hotels.Headquarters is in USA.

As on Dec-2022, LOEWS CORPORATION has 12,050 employees.

LOEWS CORPORATION annual revenue generated for period ending Dec-2022 was 14,044 million USD.

LOEWS CORPORATION annual net income generated for period ending Dec-2022 was 1,012 million USD.