New York (CNN Business) The exclusive $1 trillion club on Wall Street just got a new member. Shares of Google parent company Alphabet hit a new all-time high Thursday, pushing the company's market value to $1 trillion in the process.

Alphabet GOOGL Apple AAPL Microsoft MSFT joinsandas companies worth at least $1 trillion. Apple is the most valuable company in the United States, with a market value of nearly $1.4 trillion. Microsoft is worth almost $1.3 trillion.

This is the first time that three American companies are worth at least $1 trillion at the same time.

Amazon AMZN , which is now valued at about $930 billion, was the second US firm to ever hit the $1 trillion level back in September 2018. But at that time, Apple was the only other company with a market valuation in excess of $1 trillion.