The Largest Companies by Market Cap in March 2026

• Market cap: $4.43 trillion (as of March 2)
• Revenue (TTM): $215.9 billion
• Gross profit (TTM): $153.5 billion
• Five-year annualized return: 66.82%
• Year founded: 1993

Tech company Nvidia designs and develops graphics processing units (GPUs) originally used for PC graphics and video games. Its GPUs are in high demand because they play a key role in training and operating artificial intelligence (AI) applications. They've also been used for mining cryptocurrency (using computer processing power to validate crypto transactions and earn rewards)

Thanks to the AI boom, Nvidia is currently the most valuable company in the world and was the first to reach a market cap of $4 trillion.

2. Apple

• Market cap: $3.89 trillion (as of March 2)
• Revenue (TTM): $435.6 billion
• Gross profit (TTM): $206.2 billion
• Five-year annualized return: 16.85%
• Year founded: 1976

Tech giant Apple built its success on sales of its wildly popular products, including the iPhone, MacBook, and AirPods. It has branched out into services, including its Apple TV+ streaming service. It's also developing Apple Intelligence, an AI technology. It should be noted that as of 2025, Apple will be outsourcing some of its Apple Intelligence to be handled by Google.

On a negative note, the U.S. Department of Justice filed an antitrust lawsuit against Apple in March 2024. It alleges that Apple maintains an illegal monopoly over smartphones through contractual restrictions on developers.

3. Alphabet (Google)

• Market cap: $3.77 trillion (as of March 2)
• Revenue (TTM): $402.8 billion
• Gross profit (TTM): $240.3 billion
• Five-year annualized return: 25.26%
• Year founded: 1998 (Google), 2015 (Alphabet)

Alphabet is the holding company formed through a restructuring of Google in 2015. Of course, Google is most well-known as a search engine, becoming so famous that the name is synonymous with online searches. That's just one of Alphabet’s many widely used products, which also include:

• Email service Gmail
• Video site YouTube
• Navigation apps Waze and Maps
• Pixel smartphones

4. Microsoft

• Market cap: $2.96 trillion (as of March 2)
• Revenue (TTM): $305.5 billion
• Gross profit (TTM): $209.5 billion
• Five-year annualized return: 11.07%
• Year founded: 1975

Considering the popularity of the Windows operating system, it’s no surprise that Microsoft has consistently ranked as one of the largest companies in the world. About two-thirds (67%) of computers use Windows, according to Statcounter. While it's most famous for Windows, Microsoft has a diverse selection of products, including Office Suite software, the Azure cloud platform, and Xbox video game consoles.

Microsoft has been making a big push into AI technology. It launched an AI-powered digital assistant, Microsoft Copilot, and it's on course for about $100 billion in 2026 infrastructure spending. It has also been partnered with OpenAI since 2019, and after a recapitalization, it holds a roughly 27% stake in that AI company.

5. Amazon

• Market cap: $2.24 trillion (as of March 2)
• Revenue (TTM): $716.9 billion
• Gross profit (TTM): $360.5 billion
• Five-year annualized return: 6.31%
• Year founded: 1994

E-commerce leader Amazon began as an online bookstore, which illustrates just how far its reach has expanded. It's now the site where you can buy practically anything. It’s the largest online retailer in the world and the leader in terms of revenue.

The company’s Amazon Prime service has more than 200 million users worldwide. It's also the largest cloud provider in the world with Amazon Web Services (AWS). And that's only the tip of the iceberg. Amazon offers its Amazon Prime Video streaming service and video game streaming through Twitch, in addition to owning the Whole Foods Market grocery chain.

• Market cap: $1.91 trillion (as of March 2)
• Revenue (TTM): $120.7 billion*
• Gross profit (TTM): $72.3 billion*
• Five-year annualized return: 24.36%
• Year founded: 1987

*Converted from New Taiwan dollars.

Taiwan Semiconductor Manufacturing, also known as TSMC, is a leader in semiconductor production and is Taiwan's most valuable company. As such, it works with many of the leading global technology companies, including Apple and Nvidia. It's another tech company benefiting from the growth of AI. It's the largest contract chip manufacturer in the world, and demand for AI chips has led to increased sales for TSMC.

TSMC is in the process of expanding its semiconductor manufacturing operations in the U.S. It has announced plans to invest $165 billion in U.S. fabrication plants, advanced packaging facilities, and a research and development team center.

7. Saudi Arabian Oil

• Market cap: $1.69 trillion* (as of March 2)
• Revenue (TTM): $448.6 billion*
• Gross profit (TTM): $220.3 billion*
• Five-year annualized return: -7.90%
• Year founded: 1933

*Converted from Saudi riyals.

Saudi Arabian Oil, also known as Saudi Aramco, is an energy and chemicals company. Owned by the Saudi Arabian government, it has the largest daily oil production and the second-largest proven crude oil reserves of all oil companies.

Saudi Aramco signed a joint development agreement with China's BYD Company, the world's largest electric vehicle (EV) manufacturer, in April 2025. The company's Jafurah project, reportedly the largest shale natural gas development outside the U.S., started production in December 2025.

8. Meta Platforms

• Market cap: $1.65 trillion (as of March 2)
• Revenue (TTM): $201.0 billion
• Gross profit (TTM): $164.8 billion
• Five-year annualized return: 20.27%
• Year founded: 2004

The company formerly known as Facebook rebranded in 2021 and announced a new focus on building the metaverse. More recently, Meta Platforms has been investing heavily in AI. It launched its first Meta AI app, an AI assistant, in April 2025. CEO Mark Zuckerberg also went on a hiring spree for top talent and announced Meta Superintelligence Labs in June 2025. The organization aims to develop AI superintelligence, a theoretical stage of AI that would surpass humans in practically every area.

For now, Meta Platform's biggest products are its social networks, Facebook and Instagram. It also owns WhatsApp and Messenger, and it expanded into virtual reality with its Meta Quest devices and its acquisition of Oculus. Meta makes the vast majority of its money from advertising, which accounts for about 98% of its revenue.

9. Tesla

• Market cap: $1.51 trillion (as of March 2)
• Revenue (TTM): $94.8 billion
• Gross profit (TTM): $17.1 billion
• Five-year annualized return: 12.32%
• Year founded: 2003

Tesla rode the growth of EVs to become the most valuable automaker in the world. Its most popular vehicle, the Tesla Model Y, was also the best-selling car worldwide in 2023 and 2024.

Although Tesla is most famous for its vehicles, it made a major strategic shift in January 2026. CEO Elon Musk announced plans to discontinue production of the Model S and X as part of a greater focus on robotics, including the Tesla Optimus humanoid robot. In addition to EVs and robotics, Tesla manufactures solar energy products and owns and operates two charging networks: the Tesla Supercharger network and the Destination Charging network.

10. Broadcom

• Market cap: $1.09 trillion (as of March 2)
• Revenue (TTM): $400.5 billion
• Five-year annualized return: 15.73%
• Year founded: 1839

Berkshire Hathaway was the first U.S. company outside the tech sector to reach a $1 trillion market cap. It started out as a textile company and remained in that business for more than a century, but it's perhaps most well-known for its ties to legendary investor Warren Buffett. He began investing in Berkshire in 1962, took majority control in 1965, and converted it into a holding company in 1970.

After serving as Berkshire's CEO for 60 years, Buffett retired at the end of 2025. Greg Abel took over as CEO, with Buffett still serving as chairman of the board. While Berkshire's primary business is insurance (it owns one of the largest insurance companies, GEICO), it has also invested in companies across various industries.

12. Walmart

• Market cap: $1.01 trillion (as of March 2)
• Revenue (TTM): $713.2 billion
• Gross profit (TTM): $177.8 billion
• Five-year annualized return: 24.19%
• Year founded: 1962

Walmart is the world's second-largest retailer, only recently being surpassed by Amazon. It still earns over $700 billion in annual revenue, more than most of the other companies on this list by a wide margin.

This retail giant is also notable for being the largest family-owned business. Brothers Sam and James "Bud" Walton started the company, and the Walton family still owns over 40% of the company.

13. Samsung Electronics

• Market cap: $909.41 billion (as of March 2)
• Revenue (TTM): $65.2 billion
• Gross profit (TTM): $54.1 billion
• Five-year annualized return: 38.71%
• Year founded: 1876

Founded by a chemist and Union Army veteran of the same name, Eli Lilly is one of the world's largest pharmaceutical companies. It was the first company to mass-produce insulin and the polio vaccine.

Eli Lilly's main revenue drivers are diabetes drugs and weight loss medication, specifically Mounjaro and Zepbound. In November 2025, it agreed to a deal with the Trump administration to lower the cost of Zepbound and make it more accessible. It also manufactures antidepressants, most notably Prozac, and donanemab, a treatment for Alzheimer's disease.

15. JPMorgan Chase

• Market cap: $642.60 billion (as of March 2)
• Revenue (TTM): $323.9 billion
• Gross profit (TTM): $71.2 billion
• Five-year annualized return: 22.91%
• Year founded: 1882 (Standard Oil of New Jersey), 1999 (merger of Exxon and Mobil)

As recently as 2013, ExxonMobil was the largest company by market cap. However, environmental disasters and a long history of climate change denial led to heavy criticism of the oil company.

Despite its controversial reputation, ExxonMobil remains a leader in terms of revenue and operates in more than 50 countries. It's also the world's second-largest oil company, behind only Saudi Aramco.

17. Visa

• Market cap: $610.90 billion (as of March 2)
• Revenue (TTM): $41.4 billion
• Gross profit (TTM): $33.6 billion
• Five-year annualized return: 8.55%
• Year founded: 1958

Visa is the most widespread payment network in the world, and it processes transactions for prepaid cards, debit cards, and credit cards. It's accepted in over 130 million merchant locations across more than 200 countries and territories, and it reported $14 trillion in payments volume in its 2025 fiscal year.

The U.S. Department of Justice filed an antitrust lawsuit against Visa in September 2024. It alleges that Visa operates an illegal monopoly over the debit card payments market. Visa is contesting the lawsuit.

18. Johnson & Johnson

• Market cap: $591.34 billion (as of March 2)
• Revenue (TTM): $102.3 billion*
• Gross profit (TTM): $55.9 billion*
• Five-year annualized return: -5.50%
• Year founded: 1998

*Converted from Chinese yuan.

Tencent is an internet and technology company, and it's the most valuable publicly traded company in China. It's known for its communication services, including the WeChat app, as well as for publishing video games and other digital content. In March 2025, Tencent acquired a 25% stake in Vantage Studios, a new subsidiary of gaming company Ubisoft Entertainment.

20. ASML

• Market cap: $558.97 billion (as of March 2)
• Revenue (TTM): $38.2 billion*
• Gross profit (TTM): $20.2 billion*
• Five-year annualized return: 20.66%
• Year founded: 1984

Based in The Netherlands, ASML develops chip-making equipment, specifically photolithography machines. Its extreme ultraviolet (EUV) systems are a critical component in the production of the most advanced AI semiconductors. Although chip demand has led to a sales boom for ASML, the Dutch company announced plans to cut 1,700 jobs in January 2026.