Market capitalisation – or ‘market cap’ – reflects the total value of a company’s outstanding shares, calculated by multiplying the share price by the number of shares. It’s a useful way to compare the size of listed companies across sectors and regions.

Here’s a breakdown of the world’s largest companies by market cap, as of 15 August 2025:

The largest companies by market cap

The rankings are based on reported market cap in USD, along with the latest available share price and each company’s primary listing country – as of 15 August 2025. A higher market capitalisation results in a higher rank.

Rank

Company

Market cap

Country

1

NVIDIA $4.44T USA

2

Microsoft $3.88T USA

3

Apple $3.45T USA

4

Amazon $2.46T USA

5

Alphabet (Google) $2.45T USA

6

Meta Platforms (Facebook) $1.96T USA

7

Saudi Armco $1.55T Saudi Arabia

8

Broadcom $1.46T USA

9

TSMC $1.24T Taiwan

10

Tesla $1.05T USA

FAQ

What is market cap and why does it matter?

Market cap, short for market capitalisation, is the total value of a company’s outstanding shares, calculated by multiplying the share price by the number of shares issued. It’s a quick way to assess a company’s size, and can give insights into its stability and how it compares with others in the market.

How often do the largest companies by market cap change?

The rankings can shift due to company earnings, mergers, sector performance, or broader economic trends. While some large caps stay at the top for years, sudden price changes or market shifts can see others move in or out of the top spots.

Can I trade the largest market cap companies as share CFDs?

Yes. Many of the world’s biggest companies are available to trade as share CFDs.These let you speculate on rising or falling prices without owning the underlying shares. Just remember: CFDs are traded on margin, so leverage can magnify both your gains and your losses.

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