The FTSE 100 represents about what percentage by market cap of all British public companies?

The FTSE 100 represents roughly 80% of the total market cap of all public British companies.

What are the largest biotech companies by market cap?

The largest three biotech companies by market cap are Eli Lilly, Johnson & Johnson (NYSE:JNJ), and AbbVie (NYSE:ABBV).

What are the largest U.S. companies by market cap?

As of September 2026, the biggest U.S. companies by market cap were Nvidia, Apple, and Alphabet (Google).

The Largest Companies by Market Cap in September 2026

Nvidia, Apple, and Alphabet are the biggest companies by market cap

By Lyle Daly – Updated Sep 7, 2026 at 12:12 PM EST | Fact-checked by Frank Bass

+Fool.comon

Key Points

Nvidia leads as the world's largest company by market cap at $5.6 trillion, powered by AI technology.
Apple, valued at $4.7 trillion, diversifies by integrating services like Apple TV+ with its products.
Alphabet's market cap stands at $4.1 trillion, driven by its extensive range of widely used products.

Nvidia (NVDA +2.54%) is the world's largest company by market cap, followed by Apple (AAPL +1.38%) and Alphabet (GOOG +1.27%)(GOOGL +1.30%). The impact of AI is evident among the largest companies, as most of the top 10 are investing in it or involved in AI infrastructure. Read on to see the 20 most valuable companies as of September 2026.

Editors note: Rankings and financial metrics are as of Sept. 4, 2026; live quote cards update automatically and are the most current data available.

Loading paragraph...

An aerial shot of data centers. — Image source: Getty Images.

Loading image...

Largest companies by market cap

Ticker Information Table
Name and ticker	Market capMarket cap calculated using publicly traded shares outstanding only. Does not include unlisted, private, or dual-class non-traded shares. Implied market cap may vary.	Current price	Sector
Nvidia (NASDAQ:NVDA)	$5.3 trillion	$219.34	Information Technology
Apple (NASDAQ:AAPL)	$4.9 trillion	$337.00	Information Technology
Alphabet (NASDAQ:GOOG)	$4.2 trillion	$343.68	Communication Services
Microsoft (NASDAQ:MSFT)	$3.7 trillion	$497.75	Information Technology
Amazon (NASDAQ:AMZN)	$2.7 trillion	$251.19	Consumer Discretionary
Taiwan Semiconductor Manufacturing (NYSE:TSM)	$2.2 trillion	$430.26	Information Technology
Space Exploration Technologies (NASDAQ:SPCX)	$2.1 trillion	$154.81	Communication Services
Broadcom (NASDAQ:AVGO)	$1.7 trillion	$347.30	Information Technology
Saudi Arabian Oil (SASE:2222)	$0.0 thousand	SAR 25.56	Energy
Meta Platforms (NASDAQ:META)	$1.7 trillion	$682.31	Communication Services
Tesla (NASDAQ:TSLA)	$1.4 trillion	$366.20	Consumer Discretionary
SK Hynix (NASDAQ:SKHY)	$1.3 trillion	$182.99	Information Technology
Samsung Electronics (OTC:SSNLF)	$919.3 billion	$139.76	Information Technology
Micron Technology (NASDAQ:MU)	$1.1 trillion	$977.50	Information Technology
Berkshire Hathaway (NYSE:BRKA)	$1.1 trillion	$763,935.95	Financials
Eli Lilly (NYSE:LLY)	$1.1 trillion	$1,152.44	Health Care
JPMorgan Chase (NYSE:JPM)	$928.5 billion	$349.31	Financials
Walmart (NASDAQ:WMT)	$847.2 billion	$106.79	Consumer Staples
Advanced Micro Devices (NASDAQ:AMD)	$889.8 billion	$545.09	Information Technology
Visa (NYSE:V)	$690.7 billion	$369.93	Financials

Data as of Sep 18, 2026. Showing 20 of 20 total entries.

Loading ticker_table...

1. Nvidia

NASDAQ: NVDA

Nvidia

Premium Feature

Moneyball Superscore

94/100

Today's Change

(2.54%) $5.44

Current Price

$219.34

Key Data Points

Market Cap

$5.3T

Day's Range

$217.15 - $219.91

52wk Range

$164.27 - $236.54

Volume

94.2M

Avg Vol

130.1M

Gross Margin

74.67%

Dividend Yield

0.24%

Loading company_card...

Market cap: $5.56 trillion (as of Sept. 4)
Revenue (TTM): $303.0 billion
Gross profit (TTM): $226.2 billion
Five-year annualized return: 58.76%
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 from AI companies because they play a key role in training and operating large language models (LLMs). 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 $5 trillion.

2. Apple

Loading paragraph...

NASDAQ: AAPL

Apple

Premium Feature

Moneyball Superscore

88/100

Today's Change

(1.38%) $4.59

Current Price

$337.00

Key Data Points

Market Cap

$4.9T

Day's Range

$330.18 - $338.34

52wk Range

$240.21 - $344.57

Volume

36.7M

Avg Vol

53.4M

Gross Margin

48.65%

Dividend Yield

0.31%

Loading company_card...

Market cap: $4.67 trillion (as of Sept. 4)
Revenue (TTM): $466.8 billion
Gross profit (TTM): $227.1 billion
Five-year annualized return: 15.70%
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 Apple TV+. It also developed Apple Intelligence, an AI technology. It should be noted that, as of 2026, Apple was outsourcing some of its Apple Intelligence to Google.

3. Alphabet

Loading paragraph...

NASDAQ: GOOGL

Alphabet

Premium Feature

Moneyball Superscore

93/100

Today's Change

(1.30%) $4.46

Current Price

$347.33

Key Data Points

Market Cap

$4.2T

Day's Range

$343.89 - $349.50

52wk Range

$235.84 - $408.61

Volume

19.2M

Avg Vol

29.7M

Gross Margin

60.94%

Dividend Yield

0.25%

Loading company_card...

Market cap: $4.14 trillion (as of Sept. 4)
Revenue (TTM): $445.9 billion
Gross profit (TTM): $271.5 billion
Five-year annualized return: 18.68%
Year founded: 1998 (Google), 2015 (Alphabet)

Alphabet is the holding company formed through Google's 2015 restructuring. 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

Loading paragraph...

Best Large-Cap Stocks to Buy in 2026

Explore the world of large-cap stocks and learn how these can shape your portfolio. Get a list of the strongest large-cap stocks.

How to Buy Apple Stock (AAPL): Everything Investors Need to Know

Get step-by-step guidance on investing in Apple stock and learn the ins and outs of this technology company.

How to Buy Google Stock

Get step-by-step guidance on investing in Google (aka Alphabet) stock and learn the ins and outs of this behemoth tech company.

Which Crypto Exchanges Are the Largest in 2026?

Which crypto exchanges are the biggest in 2026? We rank the top platforms by daily trading volume.

Loading hub_pages...

4. Microsoft

NASDAQ: MSFT

Microsoft

Premium Feature

Moneyball Superscore

93/100

Today's Change

(1.52%) $7.45

Current Price

$497.75

Key Data Points

Market Cap

$3.7T

Day's Range

$493.17 - $501.47

52wk Range

$349.20 - $553.72

Volume

17.8M

Avg Vol

34.4M

Gross Margin

67.94%

Dividend Yield

0.73%

Loading company_card...

Market cap: $3.71 trillion (as of Sept. 4)
Revenue (TTM): $331.8 billion
Gross profit (TTM): $225.5 billion
Five-year annualized return: 10.66%
Year founded: 1975

Considering the popularity of the Windows operating system, it's no surprise that Microsoft (MSFT +1.52%) has consistently ranked as one of the largest companies in the world. Over 60% of computers use Windows, according to Statcounter. While it's best known for Windows, Microsoft offers a diverse product line, including the Office Suite, 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 is estimated to spend $175 billion on capital expenditures in 2026. 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

Loading paragraph...

NASDAQ: AMZN

Amazon

Premium Feature

Moneyball Superscore

90/100

Today's Change

(2.13%) $5.23

Current Price

$251.19

Key Data Points

Market Cap

$2.7T

Day's Range

$249.24 - $252.73

52wk Range

$196.00 - $287.20

Volume

30.4M

Avg Vol

46.5M

Gross Margin

50.77%

Loading company_card...

Market cap: $2.79 trillion (as of Sept. 4)
Revenue (TTM): $775.7 billion
Gross profit (TTM): $393.8 billion
Five-year annualized return: 8.25%
Year founded: 1994

E-commerce leader Amazon (AMZN +2.13%) 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 leading company 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 Twitch video game streaming, in addition to owning the Whole Foods Market grocery chain.

Loading paragraph...

6. Taiwan Semiconductor Manufacturing

NYSE: TSM

Taiwan Semiconductor Manufacturing

Premium Feature

Moneyball Superscore

99/100

Today's Change

(3.00%) $12.54

Current Price

$430.26

Key Data Points

Market Cap

$2.2T

Day's Range

$423.39 - $430.53

52wk Range

$262.81 - $479.00

Volume

12.4M

Avg Vol

12.7M

Gross Margin

63.08%

Dividend Yield

0.88%

Loading company_card...

Market cap: $2.23 trillion (as of Sept. 4)
Revenue (TTM): $140.1 billion*
Gross profit (TTM): $89.9 billion*
Five-year annualized return: 28.18%
Year founded: 1987

*Converted from New Taiwan dollars.

Taiwan Semiconductor Manufacturing (TSM +3.00%), 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 AI's growth. It's the largest contract chip manufacturer in the world, and demand for AI chips has led to increased sales for TSMC.

TSMC is expanding its semiconductor manufacturing operations in the U.S. It has announced plans to invest $265 billion in U.S. fabrication plants, advanced packaging facilities, and a research and development team center.

7. Space Exploration Technologies

Loading paragraph...

NASDAQ: SPCX

Space Exploration Technologies

Today's Change

(2.60%) $3.93

Current Price

$154.81

Key Data Points

Market Cap

$2.1T

Day's Range

$152.63 - $156.87

52wk Range

$104.83 - $225.64

Volume

84M

Avg Vol

95.8M

Loading company_card...

Market cap: $1.95 trillion (as of Sept. 4)
Revenue (TTM): $23.0 billion
Gross profit (TTM): $12.0 billion
Year founded: 2002

Space Exploration Technologies (SPCX +2.60%), more commonly known as SpaceX, is a space, telecommunications, and AI company. CEO Elon Musk founded the company with the goal of making spaceflight more affordable, and SpaceX now has an 80% market share in the commercial space launch industry.

SpaceX acquired xAI, another Musk-owned company that includes X (formerly Twitter), in February 2026. SpaceX went public in June 2026 with the largest IPO in history.

8. Broadcom

Loading paragraph...

NASDAQ: AVGO

Broadcom

Premium Feature

Moneyball Superscore

90/100

Today's Change

(2.29%) $7.79

Current Price

$347.30

Key Data Points

Market Cap

$1.7T

Day's Range

$345.31 - $350.94

52wk Range

$289.96 - $495.00

Volume

24.4M

Avg Vol

23.4M

Gross Margin

66.54%

Dividend Yield

0.73%

Loading company_card...

Market cap: $1.70 trillion (as of Sept. 4)
Revenue (TTM): $89.1 billion
Gross profit (TTM): $61.3 billion
Five-year annualized return: 48.38%
Year founded: 1961 (HP Associates), 2005 (Avago Technologies), 2016 (Broadcom Limited)

Broadcom (AVGO +2.29%) started out as HP Associates, HP's semiconductor division. It's now one of the largest semiconductor companies and develops custom chips for multiple hyperscalers.

In addition to its semiconductor business, Broadcom also has infrastructure software products. It significantly expanded its software division through the acquisition of VMware in November 2023.

9. Saudi Arabian Oil

Loading paragraph...

SASE: 2222

Saudi Arabian Oil

Today's Change

(-0.47%) $-0.12

Current Price

$25.56

Key Data Points

Day's Range

$25.56 - $25.72

52wk Range

$23.29 - $27.96

Volume

12M

Loading company_card...

Market cap: $1.68 trillion* (as of Sept. 4)
Revenue (TTM): $485.0 billion*
Gross profit (TTM): $249.5 billion*
Five-year annualized return: -2.20%
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 by sales volume, in April 2025. The company's Jafurah project, reportedly the largest shale natural gas development outside the U.S., started production in December 2025.

Loading paragraph...

10. Meta Platforms

NASDAQ: META

Meta Platforms

Premium Feature

Moneyball Superscore

79/100

Today's Change

(1.34%) $9.00

Current Price

$682.31

Key Data Points

Market Cap

$1.7T

Day's Range

$667.05 - $683.20

52wk Range

$520.26 - $790.80

Volume

15.9M

Avg Vol

18.3M

Gross Margin

81.75%

Dividend Yield

0.31%

Loading company_card...

Market cap: $1.57 trillion (as of Sept. 4)
Revenue (TTM): $228.3 billion
Gross profit (TTM): $186.6 billion
Five-year annualized return: 10.39%
Year founded: 2004

The company formerly known as Facebook rebranded to Meta Platforms (META +1.34%) in 2021. More recently, this social media company has been investing heavily in AI tools and infrastructure.

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 revenue from advertising, accounting for about 98%.

11. Tesla

Loading paragraph...

NASDAQ: TSLA

Tesla

Premium Feature

Moneyball Superscore

65/100

Today's Change

(2.27%) $8.12

Current Price

$366.20

Key Data Points

Market Cap

$1.4T

Day's Range

$363.22 - $374.12

52wk Range

$297.38 - $498.83

Volume

38.9M

Avg Vol

39.9M

Gross Margin

18.85%

Loading company_card...

Market cap: $1.40 trillion (as of Sept. 4)
Revenue (TTM): $103.6 billion
Gross profit (TTM): $19.5 billion
Five-year annualized return: 7.69%
Year founded: 2003

Tesla (TSLA +2.27%) rode the growth of EVs to become the world's most valuable automaker. 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.

12. SK Hynix

Loading paragraph...

NASDAQ: SKHY

SK Hynix

Today's Change

(4.64%) $8.12

Current Price

$182.99

Key Data Points

Market Cap

$1.3T

Day's Range

$181.26 - $185.33

52wk Range

$124.80 - $199.87

Volume

16.9M

Avg Vol

30.8M

Gross Margin

75.63%

Loading company_card...

Market cap: $1.26 trillion (as of Sept. 4)
Revenue (TTM): $189.2 billion
Gross profit (TTM): $144.3 billion
Year founded: 1983 (Hyundai Electronics), 2001 (Hynix), 2012 (SK Hynix)

SK Hynix is a memory company and one of the largest manufacturers of DRAM and NAND chips. It provides memory to many major tech companies, including Apple and Microsoft. Based in South Korea, SK Hynix made its U.S. stock market debut in July 2026.

13. Samsung

Loading paragraph...

OTC: SSNLF

Samsung Electronics

Today's Change

(0.00%) $0.00

Current Price

$139.76

Key Data Points

Market Cap

$919B

Day's Range

$139.76 - $139.76

52wk Range

$42.33 - $140.00

Volume

100

Gross Margin

56.61%

Dividend Yield

0.82%

Loading company_card...

Market cap: $1.25 trillion* (as of Sept. 4)
Revenue (TTM): $360.5 billion*
Gross profit (TTM): $207.2 billion*
Five-year annualized return: 27.24%
Year founded: 1938

*Converted from South Korean won.

Samsung Electronics (SSNL.F +0.00%) is a South Korean consumer and industrial electronics company. It's known for the Galaxy smartphone and tablet lines, as well as TVs and wearables.

This electronics company is also one of the world's top memory chip manufacturers. Its high-bandwidth memory (HBM) products, in particular, have soared in popularity amid rising AI memory demands.

14. Micron Technology

Loading paragraph...

NASDAQ: MU

Micron Technology

Premium Feature

Moneyball Superscore

92/100

Today's Change

(5.50%) $50.95

Current Price

$977.50

Key Data Points

Market Cap

$1.1T

Day's Range

$953.50 - $986.20

52wk Range

$154.65 - $1255.00

Volume

22.1M

Avg Vol

39.6M

Gross Margin

72.60%

Dividend Yield

0.05%

Loading company_card...

Market cap: $1.15 trillion (as of Sept. 4)
Revenue (TTM): $90.3 billion
Gross profit (TTM): $65.5 billion
Five-year annualized return: 68.97%
Year founded: 1978

Along with Samsung and SK Hynix, Micron Technology (MU +5.50%) is one of the "Big Three" memory companies -- and the only one headquartered in the U.S. Micron manufactures DRAM, flash memory, and SSD memory products.

15. Berkshire Hathaway

Loading paragraph...

NYSE: BRKA

Berkshire Hathaway

Today's Change

(-2.10%) $-16,361.24

Current Price

$763,935.95

Key Data Points

Market Cap

$1.1T

Day's Range

$763670.50 - $779005.76

52wk Range

$698000.00 - $806102.81

Volume

235

Avg Vol

179

Gross Margin

23.52%

Loading company_card...

Market cap: $1.08 trillion (as of Sept. 4)
Revenue (TTM): $438.3 billion
Five-year annualized return: 12.35%
Year founded: 1839

Berkshire Hathaway (BRK.A -2.10%)(BRK.B -2.04%) was the first U.S. company outside the tech sector to reach a $1 trillion market cap. It started 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.

16. Eli Lilly

Loading paragraph...

NYSE: LLY

Eli Lilly

Premium Feature

Moneyball Superscore

93/100

Today's Change

(1.28%) $14.62

Current Price

$1,152.44

Key Data Points

Market Cap

$1.1T

Day's Range

$1138.26 - $1159.75

52wk Range

$712.05 - $1292.65

Volume

1.9M

Avg Vol

2.7M

Gross Margin

83.40%

Dividend Yield

0.58%

Loading company_card...

Market cap: $1.03 trillion (as of Sept. 4)
Revenue (TTM): $79.7 billion
Gross profit (TTM): $66.4 billion
Five-year annualized return: 34.66%
Year founded: 1876

Founded by a chemist and Union Army veteran of the same name, Eli Lilly (LLY +1.28%) 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. Its GLP-1 weight loss pill, Foundayo, received FDA approval on April 1, 2026. Eli Lilly also manufactures antidepressants, most notably Prozac, and donanemab, a treatment for Alzheimer's disease.

Loading paragraph...

17. JPMorgan Chase

NYSE: JPM

JPMorgan Chase

Premium Feature

Moneyball Superscore

75/100

Today's Change

(0.11%) $0.39

Current Price

$349.31

Key Data Points

Market Cap

$929B

Day's Range

$345.27 - $353.49

52wk Range

$279.10 - $366.50

Volume

6.5M

Avg Vol

7.9M

Dividend Yield

1.72%

Loading company_card...

Market cap: $953.33 billion (as of Sept. 4)
Revenue (TTM): $194.9 billion
Five-year annualized return: 17.59%
Year founded: 1799 (Bank of the Manhattan Company), 2000 (merger of JPMorgan and Chase)

While there are several big banks in the U.S., JPMorgan Chase (JPM +0.11%) is the biggest. It managed $5.1 trillion in assets as of the second quarter of 2026, more than any other U.S. bank and the fifth-highest globally.

JPMorgan has launched multiple ventures in the growing cryptocurrency market. It partnered with Coinbase, one of the leading crypto exchanges, in July. The partnership makes it easier for the bank's customers to invest in cryptocurrency. JPMorgan launched its own deposit token, JPMD, in June. The bank is also incorporating AI technology into its operations.

18. Walmart

Loading paragraph...

NASDAQ: WMT

Walmart

Today's Change

(-0.66%) $-0.71

Current Price

$106.79

Key Data Points

Market Cap

$847B

Day's Range

$106.15 - $107.80

52wk Range

$98.88 - $135.16

Volume

19.2M

Avg Vol

24.1M

Gross Margin

25.23%

Dividend Yield

0.92%

Loading company_card...

Market cap: $852.63 billion (as of Sept. 4)
Revenue (TTM): $735.8 billion
Gross profit (TTM): $185.7 billion
Five-year annualized return: 16.58%
Year founded: 1962

Walmart (WMT -0.66%) is the world's second-largest retailer, having been surpassed only recently 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 founded the company, and the Walton family still owns more than 40% of it.

19. Advanced Micro Devices

Loading paragraph...

NASDAQ: AMD

Advanced Micro Devices

Premium Feature

Moneyball Superscore

94/100

Today's Change

(6.36%) $32.59

Current Price

$545.09

Key Data Points

Market Cap

$890B

Day's Range

$527.60 - $551.42

52wk Range

$154.78 - $584.73

Volume

28.5M

Avg Vol

25.1M

Gross Margin

50.37%

Loading company_card...

Market cap: $779.62 billion (as of Sept. 4)
Revenue (TTM): $41.3 billion
Gross profit (TTM): $22.0 billion
Five-year annualized return: 34.15%
Year founded: 1969

Advanced Micro Devices (AMD +6.36%), also known as AMD, makes high-performance computing products. Its products include the CPUs and GPUs used in AI data centers. AMD technology also powers the PlayStation and Xbox video game consoles.

20. Visa

Loading paragraph...

NYSE: V

Visa

Premium Feature

Moneyball Superscore

87/100

Today's Change

(-0.27%) $-1.00

Current Price

$369.93

Key Data Points

Market Cap

$691B

Day's Range

$368.39 - $372.48

52wk Range

$293.89 - $385.57

Volume

4.7M

Avg Vol

7.5M

Gross Margin

77.16%

Dividend Yield

0.72%

Loading company_card...

Market cap: $700.27 billion (as of Sept. 4)
Revenue (TTM): $44.5 billion
Gross profit (TTM): $35.7 billion
Five-year annualized return: 10.75%
Year founded: 1958

Visa (V -0.27%) is the world's most widespread payment network, processing transactions for debit, credit, and prepaid 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.

Loading paragraph...

Tech dominates, but sector diversity defines the top 20

Large-cap stocks like these are an important part of every investor's portfolio. They generally provide more safety and stability than smaller stocks, as most are established companies with strong brands.

The world's biggest companies span a wide range of businesses. The tech sector is the most well-represented, but there are plenty of companies from other sectors as well.

In addition to greater stability, large caps can also be highly profitable; 12 of the stocks on this list outperformed the S&P 500 over the past five years. Yet even with the world's biggest companies, no investment is a sure thing. A diversified portfolio is still crucial to avoid overreliance on any single company or market sector.

Loading paragraph...

Loading accordion...

The largest companies by sector

Loading content_cards...

Loading accordion...

FAQs

Loading faq...

About the Author

Lyle Daly is a contributing Motley Fool stock market analyst covering information technology and cryptocurrency. Lyle has been a contributor at the financial services company since 2018. His work has been featured on USA Today, Yahoo Finance, MSN, Fox Business, and Nasdaq. Before joining The Motley Fool, he wrote for financial brands including Intuit.

TMFLyleDaly

@LyleDaly

JPMorgan Chase is an advertising partner of Motley Fool Money. Lyle Daly has positions in ASML, Alphabet, Berkshire Hathaway, Broadcom, Meta Platforms, Nvidia, and Tesla. The Motley Fool has positions in and recommends ASML, Advanced Micro Devices, Alphabet, Amazon, Apple, Berkshire Hathaway, Broadcom, Eli Lilly, JPMorgan Chase, Meta Platforms, Micron Technology, Microsoft, Nvidia, Oracle, Taiwan Semiconductor Manufacturing, Tesla, and Walmart. The Motley Fool has a disclosure policy.

The Largest Companies by Market Cap in September 2026

Nvidia, Apple, and Alphabet are the biggest companies by market cap

Key Points

Largest companies by market cap

1. Nvidia

Key Data Points

2. Apple

Key Data Points

3. Alphabet

Key Data Points

Best Large-Cap Stocks to Buy in 2026

How to Buy Apple Stock (AAPL): Everything Investors Need to Know

How to Buy Google Stock

Which Crypto Exchanges Are the Largest in 2026?

4. Microsoft

Key Data Points

5. Amazon

Key Data Points

6. Taiwan Semiconductor Manufacturing

Key Data Points

7. Space Exploration Technologies

Key Data Points

8. Broadcom

Key Data Points

9. Saudi Arabian Oil

Key Data Points

10. Meta Platforms

Key Data Points

11. Tesla

Key Data Points

12. SK Hynix

Key Data Points

13. Samsung

Key Data Points

14. Micron Technology

Key Data Points

15. Berkshire Hathaway

Key Data Points

16. Eli Lilly

Key Data Points

17. JPMorgan Chase

Key Data Points

18. Walmart

Key Data Points

19. Advanced Micro Devices

Key Data Points

20. Visa

Key Data Points

Tech dominates, but sector diversity defines the top 20

Methodology

The largest companies by sector

Sources

FAQs

The FTSE 100 represents about what percentage by market cap of all British public companies?

The FTSE 100 represents about what percentage by market cap of all British public companies?

What are the largest biotech companies by market cap?

What are the largest biotech companies by market cap?

What are the largest U.S. companies by market cap?

What are the largest U.S. companies by market cap?

About the Author

Read Next

Stocks Mentioned

Motley Fool Stock Advisor’s Latest Pick

Premium Investing Services

Key Data Points

2. Apple

Key Data Points

3. Alphabet

Key Data Points

Best Large-Cap Stocks to Buy in 2026

How to Buy Apple Stock (AAPL): Everything Investors Need to Know

How to Buy Google Stock

Which Crypto Exchanges Are the Largest in 2026?

Key Data Points

5. Amazon

Key Data Points

Key Data Points

7. Space Exploration Technologies

Key Data Points

8. Broadcom