The U.S. stock market is home to some of the largest and most valuable companies in the world. As of early 2025, the top 10 U.S. companies by market cap are worth over $20.98 trillion combined. In total, there are currently 3,699 publicly traded companies in the U.S., with a total market value of $62.731 trillion. These companies lead in industries like technology, e-commerce, finance, and semiconductor sectors.
Key Takeaways
- As of early 2025, there are 3,699 publicly traded companies in the U.S.
- The top 10 U.S. companies by market cap are worth over $20.98 trillion combined.
- Technology companies like Apple, Microsoft, Nvidia, Google, and Amazon dominate the top ten largest companies.
What is market capitalization?
Market capitalization refers to the total value of a company’s outstanding shares of stock. It is calculated by multiplying the stock price of the company by the number of available shares in the market. Market cap guides investors about how big a company is compared to others.
For instance, if a company has 1 billion shares and all its shares are worth $100, the company’s market cap would be $100 billion. Apple and Microsoft are examples of companies with trillion-dollar market caps, demonstrating that they are well-established in their industry. It is important because it assists investors in comparing companies and choosing where to invest based on size, stability, and potential for growth.
Top 10 Largest U.S. Companies by Market Cap
The table below presents the ten largest U.S. companies by market capitalization as of early 2025.
| Rank | Company | Market Cap |
|---|---|---|
| 1 | Apple | $3.572 T |
| 2 | Microsoft | $3.085 T |
| 3 | Nvidia | $3.052 T |
| 4 | Alphabet (Google) | $2.468 T |
| 5 | Amazon | $2.467 T |
| 6 | Meta Platforms (Facebook) | $1.740 T |
| 7 | Tesla | $1.287 T |
| 8 | Berkshire Hathaway | $1.018 T |
| 9 | Broadcom | $1.010 T |
| 10 | Walmart | $792.49 B |
The data is sourced from the companiesmarketcap.
1. Apple ($3.572T)
Apple is the most valuable company in the world. It started as a personal computer company in the 1970s, but today, it makes iPhones, MacBooks, Apple Watches, iPads, and software. Over the years, Apple has built a loyal customer base and a strong business ecosystem.
Apple’s market value first hit $1 trillion in 2018, $2 trillion in 2020, and $3 trillion in 2022. It continues to grow through its subscription services (Apple Music, iCloud, Apple Pay) and investments in artificial intelligence (AI).
2. Microsoft ($3.085T)
Microsoft is a tech company that has been in the industry since the 1970s. The company initially built its success on Windows and Office products. However, today, it is a dominant force in cloud computing through its Azure platform, which competes with Amazon Web Services (AWS). Additionally, Microsoft is at the forefront of the AI revolution through its partnership with OpenAI, the company behind ChatGPT. It also dominates business solutions with Microsoft Teams, which helps companies collaborate and communicate.
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3. Nvidia ($3.052T)
Nvidia started as a gaming graphics card company, but gradually it became a leading company in artificial intelligence (AI) and data processing. Its graphics processing units (GPUs) are essential for training artificial intelligence models, self-driving cars, and cloud computing. Nvidia’s stock has skyrocketed over 1,500% in the past five years due to huge demand for its chips.
4. Alphabet (Google) ($2.468T)
Google, owned by Alphabet, is one of the biggest tech companies, with billions of people using it every day. It is the most popular search engine and a big player in online advertising, YouTube, and cloud computing. Additionally, to keep up with AI, Google is adding smart search, AI assistants, and cloud AI tools to its products.
5. Amazon ($2.467T)
Amazon is the world’s biggest online shopping platform, but its biggest moneymaker is Amazon Web Services (AWS). AWS is a cloud computing platform that delivers the infrastructure for a variety of applications, from websites and streaming services to enterprise systems. Amazon also controls logistics and artificial intelligence-based customer service. Even with increasing competition, Amazon continues to grow.
6. Meta (Facebook) ($1.740T)
Meta is a leading social media company that owns Facebook, Instagram, and WhatsApp. These platforms are used by billions of people worldwide every day. In recent years, Meta has focused on AI-powered content recommendations and has improved ad revenue with better targeting. In addition, Meta’s investments in its metaverse struggled at first, but its AR/VR technology, including the Quest headset, is slowly catching on.
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7. Tesla ($1.287T)
Tesla remains one of the biggest electric vehicle (EV) makers in the world. While traditional carmakers like Ford and GM are making more EVs, Tesla still leads with its battery technology, self-driving software, and global charging network. In addition, Tesla’s stock has been volatile, but it continues to dominate the EV market.
8. Berkshire Hathaway ($1.018T)
Berkshire Hathaway, led by legendary investor Warren Buffett, is one of the world’s biggest investment companies. It owns major stakes in companies like Apple, Coca-Cola, Bank of America, and American Express. Additionally, it has a strong investment in insurance, railroads, energy, and retail sectors, which makes it one of the most stable companies in the world.
9. Broadcom ($1.010T)
Broadcom is a leading company in the semiconductor and networking sectors. With the increased need for AI chips, 5G networks, and cloud computing, it has emerged as one of the world’s most valuable chipmakers.
10. Walmart ($792.49B)
Walmart is the world’s largest retailer. Even though Amazon dominates the online retail space, Walmart has grown its e-commerce, grocery delivery, and digital payments businesses. It has also enhanced its logistics through AI and automation, which enables it to be competitive in the retail sector.
Conclusion
With a market capitalization of $62.731 trillion, the U.S. stock market is still the largest in the world. Apple, Microsoft, Nvidia, and Alphabet are some of the largest companies in the world with the largest market capitalization. These companies have expanded over the years by embracing new technology, investing in artificial intelligence, and diversifying their businesses. Most of these companies, such as Apple, Microsoft, Nvidia, Google, and Amazon, are technology-oriented.
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