The 10 biggest companies in the world by revenue include Walmart, Amazon, State Grid, and Saudi Aramco, together generating over $4.88 trillion in annual revenue (Fortune Global 500 2025 edition, based on FY2024 results). These corporations span retail, technology, energy, and healthcare, and are headquartered across the United States, China, and Saudi Arabia.
1. Walmart
Industry: Retail
Revenue (fiscal year ended January 31, 2025): $680,990 million (Fortune Global 500 2025, #1)
Stock symbol: WMT
Walmart is headquartered in Bentonville, Arkansas, United States, and was founded in 1962 by Sam Walton. It is the world’s largest retailer by revenue, operating approximately 10,500 stores and clubs in 19 countries. Walmart held the #1 spot on the Fortune Global 500 for 12 consecutive years through 2025.
2. Amazon
Industry: Technology / E-commerce / Cloud Computing
Revenue (full year 2024): $637,960 million (Fortune Global 500 2025, #2)
Stock symbol: AMZN
Amazon is headquartered in Seattle, Washington, United States, and was founded in 1994. It operates across e-commerce, cloud computing (AWS), digital advertising, and logistics. AWS generated over $107 billion in 2024. Amazon ranked #2 on the Fortune Global 500 2025.
3. State Grid Corporation of China
Industry: Electric Utilities
Revenue (fiscal year 2024): $548,410 million (Fortune Global 500 2025, #3)
Stock symbol: N/A (state-owned enterprise)
State Grid Corporation of China is headquartered in Beijing and is owned by the Chinese central government. It is the world’s largest utility company and the largest government-owned corporation by revenue globally, serving 1.1 billion people across 26 provinces in China. It ranked #3 on the Fortune Global 500 for the second consecutive year in 2025.
4. Saudi Aramco
Industry: Oil & Gas
Revenue (full year 2024): $480,190 million (Fortune Global 500 2025, #4)
Stock symbol: 2222.SR
Saudi Aramco (Saudi Arabian Oil Company) is headquartered in Dhahran, Saudi Arabia, and is majority-owned by the Saudi government. It is the world’s largest oil producer and the most profitable company on the Fortune Global 500, reporting $105 billion in net income for 2024. Aramco holds proven oil reserves of approximately 259 billion barrels.
5. China National Petroleum Corporation (CNPC)
Industry: Oil & Gas
Revenue (fiscal year 2024): $412,650 million (Fortune Global 500 2025, #5)
Stock symbol: N/A (state-owned; listed subsidiary PetroChina: PTR / 0857.HK)
China National Petroleum Corporation is headquartered in Beijing and is wholly owned by the Chinese central government. It is China’s largest oil and gas producer and one of the largest integrated energy companies in the world, with operations in upstream exploration, pipelines, refining, and chemicals across more than 30 countries.
6. Sinopec Group
Industry: Oil & Gas / Refining & Chemicals
Revenue (fiscal year 2024): $407,490 million (Fortune Global 500 2025, #6)
Stock symbol: 0386.HK / SNP (ADR)
Sinopec Group (China Petroleum & Chemical Corporation) is headquartered in Beijing. It is the world’s largest oil refiner by capacity and a major petrochemical producer, operating more than 30,000 gas stations in China and running substantial upstream and downstream operations in over 20 countries.
7. UnitedHealth Group
Industry: Healthcare / Health Insurance
Revenue (full year 2024): $400,280 million (Fortune Global 500 2025, #7)
Stock symbol: UNH
UnitedHealth Group is headquartered in Minnetonka, Minnesota, United States. It is the largest health insurer in the United States and the highest-revenue healthcare company in the world. UnitedHealth operates through UnitedHealthcare (insurance) and Optum (health services and pharmacy benefit management), serving approximately 50 million members.
8. Apple
Industry: Technology / Consumer Electronics
Revenue (fiscal year ended September 28, 2024): $391,040 million (Fortune Global 500 2025, #8)
Stock symbol: AAPL
Apple is headquartered in Cupertino, California, United States, and was founded in 1976 by Steve Jobs, Steve Wozniak, and Ronald Wayne. It designs, manufactures, and markets consumer electronics (iPhone, Mac, iPad, Apple Watch), software, and services (App Store, Apple Music, iCloud, Apple TV+). Apple is the world’s most valuable company by market capitalization. Its Services segment reached $96.2 billion in FY2024, growing 13% year-over-year.
9. CVS Health
Industry: Healthcare / Pharmacy
Revenue (full year 2024): $372,810 million (Fortune Global 500 2025, #9)
Stock symbol: CVS
CVS Health is headquartered in Woonsocket, Rhode Island, United States. It is the largest pharmacy chain in the United States, operating over 9,000 retail locations, and also functions as a major health insurer through its Aetna subsidiary (acquired in 2018). CVS Health also operates one of the largest pharmacy benefit management businesses in the country.
10. Berkshire Hathaway
Industry: Diversified / Insurance / Conglomerate
Revenue (full year 2024): $371,430 million (Fortune Global 500 2025, #10)
Stock symbol: BRK.A / BRK.B
Berkshire Hathaway is headquartered in Omaha, Nebraska, United States, and is led by Warren Buffett. It is a diversified holding company with wholly owned subsidiaries in insurance (GEICO, General Re), utilities (Berkshire Hathaway Energy), railroads (BNSF), manufacturing, retail, and services. Berkshire also holds major equity stakes in Apple, Bank of America, American Express, and Coca-Cola.
Rankings based on the Fortune Global 500 2025 edition (FY2024 revenues, published July 2025). Source: fortune.com/ranking/global500/2025/.
Last updated: June 20, 2026
