1

Microsoft (MSFT)

Founded by Bill Gates and Paul Allen, Microsoft is a big tech company known for its computer software and services. It's worth about $3.15 trillion.

2

NVIDIA (NVDA)

Founded by Jensen Huang, NVIDIA makes computer chips that are really good for gaming and artificial intelligence. It's worth around $3.01 trillion.

3

Apple (AAPL)

Founded by Steve Jobs, Steve Wozniak, and Ronald Wayne, Apple is famous for making iPhones, iPads, and Mac computers. It's worth about $3 trillion.

4

Alphabet (Google) 

Founded by Larry Page and Sergey Brin, Alphabet is Google's parent company, and it's worth roughly $2.18 trillion. Google helps us find things on the internet and offers other services too.

5

Amazon (AMZN)

Founded by Jeff Bezos, Amazon is a huge online store where you can buy almost anything. It also does cloud computing and streaming services. It's worth about $1.89 trillion.