The iPhone maker tops the list with a market cap of $2.7 trillion.
Best known for its suite of software offerings, Microsoft's market value is $2.3 trillion.
Amazon is the largest online retailer in the world and has also built a sizable cloud business in Amazon Web Service. Its market cap is at $1.3 trillion.
Alphabet, the parent company of Google, generates a majority of its revenue from online advertising. Its market cap is $1.7 trillion.
The semiconductor company became the latest company to cross the trillion-dollar mark in June 2023. Its market cap is valued at $1.1 trillion.