Saudi Aramco, Exxon Mobil and Chevron - the most valuable oil companies in the world

The oil company Saudi Aramco surpasses, in value, any profile company in the world listed on the stock exchange. With a market capitalization of $ 1.8 trillion, the Saudi state-owned giant is worth more than the next five largest listed oil and gas companies combined, including Exxon Mobil, Chevron, Shell and PetroChina, according to an analysis by visualcapitalist.com. The cited source ranks the 20 most valuable oil and gas companies in the world by market capitalization, using data from CompaniesMarketCap (valid as of May 5, 2026).

• Saudi Aramco vs. US energy giants

The top of the global oil and gas industry is shaped by two different forces: a single state-controlled producer in the Gulf and a group of major publicly traded companies in America.

The ranking places Saudi Aramco, the state-controlled oil giant from Saudi Arabia, at the top with a market capitalization of $1.8 trillion, representing just over a third of the Top 20. That's more than the combined market value ($1.7 trillion) of the next five companies on the list: Exxon Mobil, Chevron, PetroChina, Shell and TotalEnergies. Three of the world's top 10 oil and gas companies are based in the US, with a combined market capitalization of $1.2 trillion. These are Exxon Mobil ($637 billion) and Chevron ($380 billion) and ConocoPhillips - which ranks 8th in the list of the largest oil and gas companies in the world, with a market capitalization of $152 billion.

The rest of the Top 10 includes two Chinese state-owned giants (PetroChina - 4th place, with $273 billion; CNOOC - 7th place, with $173 billion), three large European companies (Shell - 5th place, with $249 billion; TotalEnergies - 6th place, with $206 billion; BP - 10th place, with $121 billion) and Brazil's Petrobras - 9th place, with $142 billion.

According to the cited source, the combined market value of the 20 largest oil and gas companies in the world exceeds the entire GDP of Japan and approaches the GDP of Germany. Together, these companies represent one of the largest concentrations of corporate value in the world.

• Regional concentration of listed major oil companies

North America has the largest presence on the list - 10 companies with a combined value of $1.9 trillion, of which eight are US and two are Canadian. The US dominates the list by number of companies, reflecting the size of North America's capital markets and energy infrastructure.

Western Europe also has a large footprint, with Shell, TotalEnergies, BP, Equinor and ENI all on the list. However, their combined value of $760.8 billion is less than half the market capitalization of Saudi Aramco.

East Asia is represented entirely by China's three state-owned oil companies: PetroChina, CNOOC and Sinopec, with a combined market value of $541.6 billion.

• What drives oil and gas company valuations

Oil and gas company valuations are driven by two powerful forces: supply risk and rising energy demand.

On the supply side, the Strait of Hormuz remains the world's most important oil traffic hub, with average flows of about 20 million barrels per day, equivalent to about 20% of global trade in petroleum liquids. When this route is threatened, crude prices can move rapidly, raising earnings expectations for major energy companies.

At the same time, the booming demand for electricity from AI-powered data centers, electrification, and industrial expansion are increasing the strategic importance of reliable energy producers worldwide.