Top 10 biggest oil and gas companies by market cap 2025: The oil and gas sector remains one of the pillars of the global economy, powering cars, planes, industries, and homes across the world. Even as renewable energy rises, oil and gas continue to drive growth, jobs, and infrastructure. In terms of production, the United States leads globally. In 2024, American oil output touched nearly 23 million barrels per day — around 22 per cent of the world’s total. But being the top producer doesn’t necessarily mean having the most powerful company. That title belongs to Saudi Aramco, the Saudi state-owned giant. As of August 2025, Saudi Aramco is valued at a staggering $1.55 trillion, making it the largest oil and gas company in the world by market capitalisation. The company dominates Saudi oil reserves and operates Ghawar, the world’s biggest oil field. In comparison, ExxonMobil of the United States — the second-largest company — is worth $457 billion, far behind Aramco. ExxonMobil, ranked second in the world, pumps out around three million barrels of crude oil and other liquids daily, according to Statista. The company operates across every part of the oil and gas supply chain—exploration, refining, distribution, and even chemicals. It has long been counted among the oil “supermajors” or “Big Oil,” a title reserved for the industry’s most dominant players. Right after ExxonMobil is another US multinational, Chevron, which takes the third spot with a market capitalisation of $306.25 billion. Chevron is widely recognised as one of the key players in the sector. The fourth position goes to PetroChina, the first Chinese company to appear in the rankings, with a market cap of $211.45 billion. China’s contribution to global oil supply is massive. In fact, the Asia-Pacific region led the world in oil supply in 2022, recording 65.62 million terajoules, which accounted for 34.9 per cent of the global share. PetroChina, headquartered in Beijing, is a huge part of that. Looking at the global top ten, data from companiesmarketcap.com shows that four of the biggest oil companies are American (ExxonMobil, Chevron, ConocoPhillips, and Southern Company). Alongside them, there are two major Chinese players (PetroChina and CNOOC) and one British company, Shell. Indian company’s rank: While it doesn’t crack the top ten, India's Oil and Natural Gas Corporation Limited (ONGC) still has a strong presence in the global list. The state-owned enterprise sits at the 45th spot with a market cap of $34.33 billion. Five Indian companies have made it into the world’s top 100 oil and gas firms, ONGC (45th), Indian Oil (56th), Bharat Petroleum (68th), GAIL (79th) and Hindustan Petroleum (95th). Top 10 oil companies in the world 2025: Rank Company Country Market Cap (in USD) 1. Saudi Aramco Saudi Arabia $1.550 Trillion 2. ExxonMobil USA $457.95 Billion 3. Chevron USA $306.25 Billion 4. PetrolChina China $211.45 Billion 5. Shell UK $208.05 Billion 6. TotalEnergies France $136.41 Billion 7. ConocoPhillips USA $117.10 Billion 8. CNOOC China $116.86 Billion 9. Southern Company USA $103.60 Billion 10. Enbridge Canada $103.34 Billion 45. Oil and Natural Gas India $34.33 Billion Source: companiesmarketcap.com Note: The market cap of every company keeps changing; the data above is updated as of August 20, 2025
