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And then there were five.

With today’s surge in Facebook shares, all five of the tech megacaps have now eclipsed the $1 trillion valuation level.

Facebook

‘s rally came after a federal court judge granted the company’s motions to dismiss dual antitrust cases filed by the Federal Trade Commission and a group of 48 state attorneys general.

This is the first time that the U.S. market has had five stocks with a 13-digit valuation.

Apple

(ticker: AAPL) is still the world’s most valued company, at $2.249 trillion, followed by

Microsoft

(MSFT) at $2.024 trillion.

Amazon

(AMZN) is valued at $1.74 trillion, Google-parent

Alphabet

(GOOGL) is at $1.67 billion and Facebook (FB) is now worth $1.008 trillion. Microsoft crossed the $2 trillion level for the first time last week.

(Saudi Arabian Oil Co. (2222.SR), not traded in the U.S., has a valuation of $1.87 trillion.)

After the five tech stocks, there’s a big drop off in value. No other U.S.-listed stock is even close to the trillion-dollar mark. Six U.S.-listed companies have market valuations above $500 billion, though, including TenCent (TCEHY), at $740 billion;

Tesla

(TSLA) at $663 billion,

Berkshire Hathaway

(BRK-A) at $632 billion,

Alibaba

(BABA) at $620 billion,

Taiwan Semiconductor

(TSM) at $620 billion, and

Visa

(V) at $515 billion.

Facebook shares on Monday rallied 4.2% to $355.64.

Write to Eric J. Savitz at eric.savitz@barrons.com

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