The United States is home to some of the world’s biggest and most valuable companies. They work in different fields, from technology and online shopping to electric vehicles, space travel and investment management. Some make products that people use every day, while others supply computer chips, software, cloud services and financial products to businesses around the world.
Market capitalization, often called market cap, shows the total stock market value of a company’s outstanding shares. Investors use it to compare the size of publicly traded companies.
NVIDIA, Apple, Alphabet and Microsoft are among the biggest names in the US stock market. Amazon makes money through online shopping and cloud services, while Meta earns much of its revenue from advertising on its platforms. Tesla sells electric vehicles and energy products, and Berkshire Hathaway owns companies in a wide range of industries.
SpaceX is also included in the ranking, but it differs from the other names on this list. It is privately owned and does not trade on the stock market, so its valuation is not the same as the market cap of a publicly listed company.
Below is a look at the top 10 companies by market cap in USA, based on the approximate figures provided. These values can change as stock prices rise or fall. Private-company valuations can also change when new investment deals take place.
Top 10 Companies by Market Cap in USA at a Glance
| Rank | Company | Ticker | Approx. Market Cap |
| 1 | NVIDIA | NVDA | $5.24 trillion |
| 2 | Apple | AAPL | $4.99 trillion |
| 3 | Alphabet | GOOGL | $4.22 trillion |
| 4 | Microsoft | MSFT | $4.00 trillion |
| 5 | Amazon | AMZN | $2.73 trillion |
| 6 | SpaceX | Private | $1.93 trillion |
| 7 | Meta Platforms | META | $1.88 trillion |
| 8 | Broadcom | AVGO | $1.61 trillion |
| 9 | Tesla | TSLA | $1.42 trillion |
| 10 | Berkshire Hathaway | BRK.B | $1.13 trillion |
These figures are estimates, not live stock prices. SpaceX’s value is a private-company valuation rather than a market cap based on publicly traded shares.
1. NVIDIA
NVIDIA ranks first on this list and has become one of the most important names in the computer chip industry.
Jensen Huang and Chris Malachowsky founded the company in 1993. NVIDIA initially focused on graphics technology for computers, especially products that helped games look sharper and run more smoothly.
Its graphics processing units, commonly known as GPUs, soon became popular with gamers. Over time, the company expanded beyond gaming and began supplying chips and computer systems for professional design, research, networking and large-scale data processing.
Today, NVIDIA sells its products to computer makers, gaming companies, data-centre operators and other businesses. Its chips help power everything from high-end gaming computers to the large computing systems used by major companies.
NVIDIA also provides software that allows developers to get more out of its hardware. By offering both chips and supporting software, the company has built strong relationships with businesses that rely on high-performance computing.
Its well-known product lines include GeForce, RTX, Blackwell and DGX. GeForce graphics cards are popular with gamers, while RTX products serve gamers, designers and other professionals. NVIDIA’s DGX systems and data-centre products cater to organisations that need powerful computing equipment.
The company faces competition from AMD and other chipmakers. Even so, its wide product range and established customer base have helped it maintain a leading position in the industry.
Popular NVIDIA Products
- GeForce graphics cards
- NVIDIA RTX graphics products
- Blackwell processors
- DGX computing systems
- Data-centre chips
- Networking equipment
NVIDIA official website
2. Apple
Apple is one of the most valuable consumer technology companies in the world.
Steve Jobs, Steve Wozniak and Ronald Wayne founded Apple in 1976. The company initially focused on personal computers before expanding into smartphones, tablets, wearables and digital services.
The iPhone remains Apple’s best-known product.
Apple has built a large business around the iPhone, Mac, iPad, Apple Watch and AirPods. It also earns revenue from services such as the App Store, Apple Music, iCloud and Apple TV+.
One reason customers continue choosing Apple products is the way the company’s devices work together.
Customers can use an iPhone with a Mac, transfer files between devices, store photos in iCloud and connect an Apple Watch to the same account. These features make everyday tasks easier and encourage customers to stay within Apple’s product ecosystem.
Apple also designs its own chips for many devices. Its A-series processors power iPhones, while its M-series chips power Macs and several iPads.
The company places considerable emphasis on product design, software quality, privacy and security. It also earns recurring revenue when customers pay for subscriptions, cloud storage and digital content.
Apple faces competition from Samsung, Google and other smartphone makers. It also faces regulatory pressure over its app distribution policies and digital services.
Its large market capitalization reflects its strong brand, global customer base and ability to generate revenue from both hardware and services.
Popular Apple Products
- iPhone
- MacBook
- iPad
- Apple Watch
- AirPods
- Apple Music
- iCloud and other Apple services
Apple official website
Alphabet is the parent company of Google and one of the largest technology businesses in the United States.
Larry Page and Sergey Brin founded Google in 1998 while studying at Stanford University. The company started with a search engine and gradually expanded into online advertising, video streaming, mobile software and cloud computing.
Alphabet became Google’s parent company in 2015.
Google Search remains central to the business. Millions of people use it to find information, compare products, research topics and discover websites. Google earns a large share of its revenue by selling advertising connected to search results and other online services.
YouTube provides another major source of revenue through advertising and subscriptions.
Alphabet also operates Android, Google Maps, Gmail, Google Photos and Google Workspace. These services help the company reach consumers, businesses and organisations across many countries.
Google Cloud gives businesses access to computing infrastructure, storage, databases and software tools. Companies use these services to host websites, manage information and run business applications.
Another important part of Alphabet’s business is Waymo, which develops autonomous driving technology.
Alphabet faces competition in search, digital advertising and cloud computing. Changes in online habits and growing competition from other platforms can also affect its traditional revenue sources.
Despite these challenges, Google’s widely used services and advertising network give Alphabet a strong position in the global technology market.
Popular Alphabet Products and Services
- Google Search
- YouTube
- Android
- Google Cloud
- Google Maps
- Gmail
- Waymo
Alphabet official website
Microsoft has built one of the largest businesses in software, cloud computing and enterprise technology.
Bill Gates and Paul Allen founded the company in 1975. Microsoft first became widely known for personal computer software, particularly its Windows operating system and Office applications.
Those products still play an important role in its business.
Microsoft sells Windows, Microsoft 365, Teams, Dynamics 365 and other software used by individuals and organisations. Its products help people write documents, manage spreadsheets, communicate with colleagues and run business operations.
Cloud computing has also become a major part of the company.
Microsoft Azure provides computing power, storage, databases and other services to businesses. Companies use Azure to host applications, manage information and operate digital services without building all their own computing infrastructure.
Microsoft also develops developer tools, database software and business management systems. These products help it serve customers across industries, from small businesses to large corporations.
The company operates Xbox as well, giving Microsoft a strong presence in gaming through consoles, games and subscription services.
Microsoft’s broad product range helps it generate revenue from software subscriptions, cloud services, business contracts and gaming.
The company competes with Amazon and Google in cloud computing and with Apple in personal computing. Other software companies also compete for its business customers.
Its position near the top of the US market reflects its established software business, recurring revenue and role in enterprise technology.
Popular Microsoft Products and Services
- Windows
- Microsoft 365
- Azure
- Microsoft Teams
- Visual Studio
- Xbox
- Dynamics 365
Microsoft official website
Amazon started as an online bookstore and grew into one of the largest e-commerce and technology companies in the United States.
Jeff Bezos founded Amazon in 1994, and the company began selling books online in 1995. It gradually expanded into electronics, clothing, household goods, groceries and millions of other products.
Online retail remains a major part of Amazon’s business.
Customers use Amazon to compare products, read reviews and order items for home delivery. The company also operates fulfilment centres, delivery networks and logistics services that support its retail operations.
Amazon Prime helps the company build customer loyalty through shipping benefits, streaming entertainment and other services.
However, Amazon does much more than sell products.
Amazon Web Services (AWS) provides cloud computing infrastructure, storage, databases and networking services. Businesses use AWS to host websites, manage applications and store information. The division also contributes significantly to Amazon’s business.
Advertising has become another important revenue source. Sellers and brands pay Amazon to promote products to shoppers who are already searching for items to buy.
Amazon also operates Prime Video, Kindle, Audible and other digital services. Its devices include Echo smart speakers and Fire TV products.
The company faces competition from Walmart and other retailers. AWS competes with Microsoft Azure and Google Cloud, while its advertising business competes with other digital advertising platforms.
Amazon’s large market capitalization reflects its reach across online shopping, logistics, advertising, subscriptions and cloud computing.
Popular Amazon Products and Services
- Amazon online marketplace
- Amazon Prime
- Amazon Web Services
- Prime Video
- Kindle
- Alexa and Echo
- Amazon Ads
Amazon official website
SpaceX differs from the other companies in this ranking because it is a privately held company.
Elon Musk founded Space Exploration Technologies Corp. in 2002. The company set out to reduce the cost of space transportation and make space exploration more practical.
SpaceX develops rockets, spacecraft and satellite systems. Its Falcon 9 rocket plays a central role in its launch business, while Falcon Heavy serves missions that require greater lifting capacity.
One of the company’s major achievements is reusable rocket technology.
SpaceX recovers and reuses the first stage of many Falcon 9 launches. Reusing rocket hardware helps the company reduce launch costs and carry out missions more frequently.
The company also operates Dragon spacecraft, which carry cargo and astronauts to the International Space Station.
Another major business is Starlink, a satellite internet service that connects customers in areas where traditional broadband networks may offer limited coverage.
SpaceX also develops Starship, a large launch system designed to carry substantial payloads on future space missions. The company continues testing the system as it works toward its long-term spaceflight goals.
SpaceX earns money through commercial launches, government contracts, crew and cargo missions, and satellite internet services.
However, rocket development requires significant investment. Technical problems, launch delays and regulatory requirements can also affect its business.
Unlike NVIDIA or Apple, SpaceX does not have shares that trade openly on a public stock exchange. Investors therefore cannot calculate its market capitalization from a continuously quoted public share price.
The supplied figure of approximately $1.93 trillion should be treated as a private-company valuation for this ranking rather than a conventional public-market capitalization.
Major SpaceX Products and Services
- Falcon 9
- Falcon Heavy
- Dragon spacecraft
- Starlink
- Starship
- Commercial launch services
- Government and space-agency contracts
SpaceX official website
Meta Platforms operates some of the world’s most widely used social media services.
Mark Zuckerberg and his college roommates launched Facebook in 2004. The company expanded into mobile applications, messaging and virtual reality before changing its corporate name from Facebook to Meta Platforms in 2021.
Facebook remains a major part of the business, but Meta also owns Instagram, WhatsApp and Messenger.
These platforms help people communicate, share photos and videos, follow creators and discover businesses. They also give advertisers access to large audiences.
Advertising generates most of Meta’s revenue.
Businesses use Meta’s advertising tools to reach customers based on interests, activity and other signals. Instagram has become particularly important for visual advertising, creator partnerships and online shopping.
WhatsApp and Messenger support personal and business communication. Companies also use these platforms to answer customer questions, provide updates and maintain relationships with buyers.
Meta continues investing in augmented and virtual reality through its Reality Labs division. Its Quest headsets support virtual reality experiences, while its smart glasses combine cameras, audio and connected features.
The company faces competition from TikTok, YouTube, Snapchat and other digital platforms. Privacy rules and advertising regulations can also affect its operations.
Meta’s market capitalization reflects its large social media network, established advertising business and ability to connect businesses with consumers around the world.
Popular Meta Products and Services
- Messenger
- Meta Quest
- Ray-Ban Meta smart glasses
- Business advertising tools
Meta official website
Broadcom is a major semiconductor and infrastructure software company.
The company adopted its current corporate structure after Avago Technologies acquired Broadcom Corporation in 2016 and took the Broadcom name.
Broadcom supplies chips used in networking equipment, broadband devices, wireless communications and data centres.
Its products help move information between computers, servers, storage systems and networks. These components support the infrastructure that businesses and consumers rely on every day.
Broadcom also develops specialised chips for communications equipment and large computing systems. Its networking products help data centres transfer information at high speeds, while its connectivity chips support a wide range of electronic devices.
The company also operates a substantial infrastructure software business.
Broadcom completed its acquisition of VMware in 2023, expanding its reach into enterprise software and virtualisation. VMware products help organisations run applications and manage computing resources across different environments.
This combination of semiconductors and software gives Broadcom a different business model from companies that focus mainly on consumer electronics.
Broadcom competes with other semiconductor suppliers and enterprise software companies. Demand from large customers, changes in technology spending and competition can all affect its financial performance.
The company’s position among the largest US businesses reflects its role in networking, communications equipment, specialised chips and enterprise software.
Popular Broadcom Products and Businesses
- Networking semiconductors
- Wireless connectivity chips
- Broadband and communications chips
- Data-centre networking products
- VMware infrastructure software
- Enterprise networking solutions
Broadcom official website
Tesla is one of the best-known electric vehicle companies in the world.
Martin Eberhard and Marc Tarpenning founded Tesla in 2003. Elon Musk joined the company in 2004 as an early investor and later became its chief executive.
Tesla helped bring electric vehicles into the mainstream by combining battery technology, software and modern vehicle design.
Its vehicle lineup includes the Model 3, Model Y, Model S, Model X and Cybertruck. Different models target different buyers, from customers looking for everyday electric transportation to those seeking larger or more premium vehicles.
Tesla also develops charging infrastructure and energy products.
Its Supercharger network supports long-distance electric vehicle travel, while its energy business sells battery storage systems and solar products.
Battery storage has become an important area as homes, businesses and utilities look for ways to store electricity and manage energy demand.
Software also plays a major role in Tesla’s business. The company develops vehicle software, driver-assistance features and systems designed to improve the ownership experience.
Tesla has also invested in robotics and autonomous driving technology. However, the commercial success and timing of these newer businesses depend on technical progress, customer demand and regulatory requirements.
The company faces strong competition from traditional automakers and newer electric vehicle manufacturers. Price changes, production costs and consumer demand can all affect its financial performance.
Tesla’s market capitalization reflects not only its vehicle business but also investor expectations for its energy storage, autonomous driving and robotics ambitions.
Popular Tesla Products and Services
- Model 3
- Model Y
- Model S
- Model X
- Cybertruck
- Powerwall
- Megapack
- Supercharger network
Tesla official website
Berkshire Hathaway is different from most companies on this list.
Rather than focusing on one product category, it owns businesses across insurance, rail transportation, energy, manufacturing, retail and other industries.
Warren Buffett built Berkshire into a major investment and operating company over several decades. He began buying shares in the struggling textile business in the 1960s and gradually transformed it into a diversified group.
Insurance plays a central role in Berkshire’s operations.
Companies such as GEICO provide insurance products, while Berkshire’s reinsurance operations cover risks for other insurers. Insurance premiums give Berkshire funds that it can invest while meeting its obligations to policyholders.
Berkshire also owns BNSF Railway, one of the largest freight railroad networks in North America. Its energy business operates through Berkshire Hathaway Energy, which has interests in electricity generation, natural gas and related infrastructure.
Other businesses include industrial manufacturers, building products companies and consumer brands.
Berkshire also holds investments in publicly traded companies. Apple has been one of its best-known stock investments, although Berkshire can change its holdings over time.
Unlike a technology company that depends heavily on a single product category, Berkshire generates income from many different businesses.
That diversification does not eliminate risk. Insurance losses, economic downturns, investment performance and changes in operating costs can all affect its results.
Berkshire’s large market capitalization reflects its collection of operating businesses, insurance operations, investments and substantial financial resources.
Major Berkshire Hathaway Businesses and Holdings
- GEICO
- BNSF Railway
- Berkshire Hathaway Energy
- Manufacturing businesses
- Building products companies
- Retail and consumer businesses
- Public stock investments
Berkshire Hathaway official website
Which Companies Dominate the US Market?
The companies in this ranking operate in different industries, but several broad trends stand out.
| Industry | Companies in This List | Main Business |
| Semiconductors and AI computing | NVIDIA, Broadcom | Chips, networking and computing infrastructure |
| Consumer technology | Apple | Devices, software and services |
| Internet and digital advertising | Alphabet, Meta | Search, social media, advertising and AI |
| Software and cloud computing | Microsoft, Amazon | Business software, cloud services and AI |
| Space technology | SpaceX | Rockets, satellite internet and space transportation |
| Electric vehicles and energy | Tesla | Electric cars, batteries and energy systems |
| Diversified investments and operations | Berkshire Hathaway | Insurance, railways, energy and investments |
Technology companies account for a large part of the ranking. NVIDIA and Broadcom supply computing components, while Microsoft, Amazon and Alphabet operate major cloud platforms. Apple and Meta reach consumers through devices, software and digital services.
At the same time, Tesla, SpaceX and Berkshire Hathaway show how different business models can attract large valuations.
Investors value companies based on their current financial performance, expected future growth, competitive advantages and the risks they face.
Frequently Asked Questions
What are the top 10 companies by market cap in USA?
Based on the supplied figures, the ranking includes NVIDIA, Apple, Alphabet, Microsoft, Amazon, SpaceX, Meta Platforms, Broadcom, Tesla and Berkshire Hathaway.
Which is the largest company in the USA by market cap?
NVIDIA ranks first in the supplied list, with an approximate market capitalization of $5.24 trillion. Public-company rankings can change with share prices and the data source used.
What is the market capitalization of NVIDIA?
The supplied figure for NVIDIA is approximately $5.24 trillion. Its market capitalization changes as its share price and outstanding share count change.
Is Apple bigger than Microsoft by market cap?
Yes. In the supplied ranking, Apple has an approximate market capitalization of $4.99 trillion, compared with Microsoft’s $4.00 trillion.
Why does NVIDIA have such a high market cap?
NVIDIA supplies GPUs, networking products and computing systems that support AI development and data centres. Investors also consider its future growth potential, competitive position and expected demand for AI infrastructure.
Is SpaceX a publicly traded company?
No. SpaceX is privately held, so its shares do not trade on a regular public stock exchange. Investors estimate its valuation through private-market transactions and other methods.
What is the difference between market cap and revenue?
Market cap measures the market value of a company’s outstanding shares. Revenue measures the money a company earns from selling goods and services before deducting expenses.
A company can have a high market cap even when its annual revenue is lower than that of another company.
Can a company’s market cap change every day?
Yes. A public company’s market capitalization can change throughout the trading day because its share price fluctuates. Changes in the number of outstanding shares can also affect the calculation.
Which industries dominate the list?
Technology-related businesses dominate the supplied ranking. Semiconductors, AI computing, cloud services, consumer electronics and digital advertising account for much of the market value represented by these companies.
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