Apple has closed a large gap with Nvidia in the race to be the world's most valuable company. Apple is worth $4.51 trillion right now, up 14% this year. Nvidia is worth $4.71 trillion, up only 4.5% MarketWatch. The difference between them is roughly $190 billion — small enough that Apple could overtake Nvidia soon The Motley Fool.

When will we know who's on top? Apple reports earnings on July 30 The Motley Fool. A very good earnings report from Apple, combined with any weakness in Nvidia's stock, could flip the rankings before August.

These two companies have been trading the number-one spot back and forth. Nvidia reached $4 trillion in value for the first time in July 2025, beating Apple's previous record of $3.9 trillion MarketWatch. Microsoft and then Apple joined the $4 trillion club later that year MarketWatch. By the middle of 2026, Nvidia, Apple, and Alphabet were the three biggest companies in the world by market value The Motley Fool.

Nvidia's rise has been extraordinary. For most of the past 15 years, Nvidia wasn't even close to Apple in size. The last time Nvidia came this close was 2009, when the company was still building the business that would later make it a leader MarketWatch. Three years ago, Nvidia wasn't even worth $1 trillion MarketWatch. The jump from less than $1 trillion to $4.7 trillion in three years is nearly unheard of for a company this large. It shows how much investors believe artificial intelligence will require massive spending on computer chips and networking equipment.

Here's what people often miss about this horse race. For most investors, which company sits at number one doesn't actually matter much. What does matter is something less visible: these two companies now make up more than 15% of the S&P 500, a stock index that millions of people own through their retirement accounts and index funds Yahoo Finance. That's the highest percentage any two companies have ever held in this index.

When two companies make up that much of an index, it changes how risk works. Instead of owning a little piece of 500 different companies, investors who own an index fund are actually betting heavily on just two. If something goes wrong with Apple or Nvidia, it affects millions of people's retirement savings and investment accounts — not just those who specifically chose to buy those stocks.

So why does the media keep track of which company is bigger? The truth is simpler than it seems. A ranking change doesn't change how much money either company actually makes or how sound its business is. If Apple overtakes Nvidia on July 30, that won't affect Apple's profits or Nvidia's ability to serve its customers — it's just where the stock prices happened to close that day.

Apple's gains this year come mostly from people paying more for its services business and from the company buying back its own stock. Nvidia's valuation rests on the belief that big tech companies will keep spending billions on new chips and networking gear. Both stories may be true. The real concern for everyday investors is not which company wins the ranking, but that these two have become so large that index funds can't be as diversified as they're supposed to be.