What Is the Most Valuable Company in the World? Biggest Companies by Market Cap

Quick answer: The most valuable company in the world is the one with the highest market capitalization, which is its share price multiplied by the number of shares it has issued. Nvidia and Apple have been trading that top spot, and on October 23, 2026 both were worth more than $5 trillion, with just $20 billion separating them at the close.

That headline number changes every second the market is open, so the ranking you read today might be upside down by next week. What doesn’t change is the way the number is built, and once you understand that, every “Apple passes Nvidia” story starts to make a lot more sense.

What Is the Most Valuable Company in the World Right Now?

As of the October 22, 2026 market close, Nvidia ranked first at about $5.12 trillion and Apple second at about $5.08 trillion. The next closest companies were nowhere near them. A day later, on October 23, Nvidia closed at $5.094 trillion and Apple at $5.074 trillion, a gap of roughly $20 billion, according to 24/7 Wall St.

That table lists the biggest companies by market cap. Treat it as a snapshot, not a scoreboard. Apple and Nvidia have swapped places more than once this year, so the only honest answer to “who’s number one?” always comes with a date attached.

How Is Market Cap Calculated?

Market cap is the current share price multiplied by the total number of shares outstanding. The U.S. Securities and Exchange Commission’s investor site, Investor.gov, defines it the same way: a measure of a company’s total market value.

Here’s a worked example using the October 22 closing prices. Apple closed at $348.22 a share. Divide its $5.082 trillion market value by that price and you get roughly 14.6 billion shares. Nvidia closed at $212.21, and $5.124 trillion divided by that works out to roughly 24.1 billion shares. Those share counts are NexPloreInfo’s own back-of-the-envelope calculation from the published figures, not numbers reported by either company.

Nvidia vs Apple Stock: Why a Higher Share Price Doesn’t Mean a Bigger Company

A company with a higher stock price isn’t automatically worth more. In the example above, Apple’s shares cost about $136 more than Nvidia’s, yet Nvidia was still the larger company that day, because there are far more Nvidia shares in circulation.

Share price is just the price of one slice. Market cap is the size of the whole pie. And companies can cut the slices thinner or thicker whenever they like with a stock split. Nvidia did exactly that with a 10-for-1 split that took effect on June 10, 2024. After the split, each shareholder owned ten times as many shares at a tenth of the price, and the company’s total value didn’t change at all from the split itself.

This is why comparing a $212 stock with a $348 stock tells you almost nothing. If you’re weighing AAPL vs NVDA, always compare market caps, not prices.

How Many Companies Are Worth a Trillion Dollars?

Roughly 14 to 17 companies, depending on the day you count. The group is often called the trillion-dollar club, and its membership changes as stock prices move.

Yahoo Finance counted 14 companies above $1 trillion on May 27, 2026, while WTOP counted roughly 16 using intraday values on June 15, 2026. The list on the WTOP count included Nvidia, Alphabet, Apple, Microsoft, Amazon, SpaceX, Taiwan Semiconductor, Broadcom, Saudi Aramco, Tesla, Meta, Samsung Electronics, Micron, SK hynix, Berkshire Hathaway and Eli Lilly. So yes, there are plenty of trillion-dollar companies now, and a few of them aren’t American.

Who Is the Richest Company in the World?

When people ask for the richest company in the world, they almost always get an answer based on market cap, so today that means Nvidia or Apple. But “richest” can mean other things too, like the most cash, the biggest profit or the highest revenue, and each of those can crown a different company.

That’s why a company can top the market cap chart without topping the profit chart. If you’re reading a ranking, check which measure it uses before you quote it.

What Is the Biggest Company in the World?

It depends on whether you mean value or sales. By market cap, the biggest company is currently one of Nvidia and Apple. By revenue, it’s Amazon: the 2026 Fortune 500 list, published June 3, 2026, put Amazon at No. 1, ahead of Walmart, which had held the top spot for 13 years.

Amazon’s revenue passed $700 billion for 2025, up 12 percent from the year before, according to Fortune. Remember that the Fortune 500 only ranks U.S. companies, and by revenue rather than by stock value. A company can sell a huge amount and still be worth less on the stock market than one that sells less but grows faster.

Which Company Was the First Trillion-Dollar Company?

Apple was the first public U.S. company to reach a $1 trillion market cap. It did it on August 2, 2018, when its shares briefly hit $207.05, a price from before Apple’s later stock split. Axios called it a largely symbolic milestone at the time.

After that, the milestones came faster. Here’s the trail as reported by 9to5Mac, NBC News and TechCrunch.

Look at the spacing. Apple took just over two years to go from $1 trillion to $2 trillion. Nvidia went from $4 trillion to $5 trillion in about three months. The gaps between milestones keep shrinking, a sign of how quickly the very top of the market has been climbing.

To put $5 trillion in perspective, TechCrunch noted at the time that Nvidia’s value exceeded the combined stock markets of every country except the United States, China and Japan. That comparison was made in October 2025, so treat it as a snapshot too.

Intraday Versus Closing Value: A Detail That Trips People Up

Many of those milestones were hit during the trading day, not at the close. When Apple crossed $3 trillion on January 3, 2022 at $182.86 a share, NBC News noted it was an intraday figure. Apple’s first market close above $3 trillion didn’t come until June 2023.

So when you read “Company X hits $5 trillion,” ask whether it touched the number briefly or held it at the close.

What Apple’s Market Cap Is Built On

Apple’s value is tied to hardware like the iPhone and a growing services business. In its latest reported quarter, as cited by 24/7 Wall St on October 23, 2026, Apple’s revenue was $109.42 billion, up 16.4 percent from a year earlier.

Share buybacks also play a quiet role. When a company buys back its own stock, fewer shares exist, so each remaining share is worth a slightly bigger slice of the company. 9to5Mac pointed out that the exact share price Apple needs to hit $5 trillion keeps shifting because of its ongoing buyback.

If you want to see how Apple’s newest hardware plays into that story, our guide to the iPhone Duo covers the foldable that launched in October 2026.

What Nvidia’s Rise Tells You About AI Spending

Nvidia’s market cap grew because companies building AI systems need enormous numbers of its chips. In its latest reported quarter, as cited by 24/7 Wall St, its revenue was $96.22 billion, up 105.8 percent from a year earlier. That growth rate is the reason investors have been willing to pay such a high price for the company.

It’s also a very different company from its early years. CNBC has reported that Nvidia nearly went under three years into its existence, a story we covered in our piece on how Nvidia nearly went bankrupt before reaching $5 trillion. If you’re curious why chips matter so much to AI, our explainer on how AI data centers work and use power is a good next read.

Does the Top Spot Change Often?

Yes, and the order has shuffled a lot in just a few years. When Apple touched $3 trillion in January 2022, NBC News reported that Microsoft was worth about $2.5 trillion, Google just under $2 trillion and Amazon about $1.75 trillion.

By June 18, 2024, Nvidia had passed Microsoft to become the most valuable public company for the first time, with a value over $3.3 trillion, according to The Motley Fool. And by late October 2026, Nvidia and Apple were both above $5 trillion while Alphabet and Microsoft sat below $4 trillion.

The pattern is that leadership moves with what investors believe about the future.

What Market Cap Doesn’t Tell You

Market cap tells you what investors collectively think a company is worth today. It doesn’t tell you how much money the company makes, how much cash it holds, or how much debt it carries.

It also moves with mood. A company can lose hundreds of billions of dollars in market value in a single day without selling a single product less. On October 22, 2026, for example, Nvidia closed down 4.40 percent, and that one move left it just $42 billion ahead of Apple.

Analysts often pair market cap with the price-to-earnings ratio, which compares the share price with profit per share. On October 23, 2026, 24/7 Wall St listed Apple at a P/E of 45 and Nvidia at 42.

How to Check the Current Ranking Yourself

The quickest way is to look up the market cap on a financial site or your brokerage app, and then check two things: the time of the quote and whether it’s an intraday price or a close.

A few habits help. Compare two companies at the same moment, not from two different articles. Remember that share counts change with buybacks and new issuance. And be a little suspicious of any headline that doesn’t give a date, because in this race, the answer really can change by lunchtime.

You’ll also notice that the AI boom touches companies beyond the big two. We’ve explained how the Anthropic IPO works and how AI demand pushed up smartphone memory costs if you want to follow the money further.

FAQs

What is the most valuable company in the world?

The most valuable company is the one with the highest market capitalization at a given moment. On October 23, 2026, Nvidia closed at $5.094 trillion and Apple at $5.074 trillion, so the two were about $20 billion apart and have been swapping the lead.

Who is the richest company in the world?

By market cap, the richest company is currently Nvidia or Apple, depending on the day. “Richest” can also mean most cash, biggest profit or highest revenue, and those measures can point to different companies.

What is the biggest company in the world?

By market cap, it’s Nvidia or Apple. By revenue, Amazon topped the 2026 Fortune 500 list, which ranks U.S. companies, ahead of Walmart.

How many companies are worth a trillion dollars?

Roughly 14 to 17 companies, depending on the date. Yahoo Finance counted 14 on May 27, 2026, and WTOP counted roughly 16 on June 15, 2026.

Is Apple bigger than Nvidia?

It depends on the day and on how you measure. By market cap the two are within about 1 percent of each other, and Apple has briefly passed Nvidia during trading. By revenue in the latest reported quarter as of October 23, 2026, Apple’s $109.42 billion was higher than Nvidia’s $96.22 billion.

How is market cap calculated?

Market cap equals the current share price multiplied by the total number of shares outstanding. If a company has 10 billion shares priced at $100 each, its market cap is $1 trillion.

Image credits: Apple Park photo: InvadingInvader, Wikimedia Commons, CC BY-SA 4.0. Nvidia headquarters photo: Coolcaesar, Wikimedia Commons, CC BY-SA 4.0.