It might not take very much longer for it to reach $4 trillion.

Apple ( AAPL 1.80% ) became the first company to reach a $1 trillion market cap about seven years ago. Since then, the biggest tech companies in the world have only grown bigger and wielded even more influence over the stock market.

Apple touched a $3 trillion market cap in early 2022 just ahead of the market downturn. It has since been joined (and surpassed) in the $3 trillion club by Microsoft and Nvidia .

The newer members have seen their fortunes rise on the back of growing demand for artificial intelligence (AI). Nvidia designs leading-edge graphics processing units (GPUs), which are essential for AI training and inference. Microsoft is one of Nvidia's biggest customers, outfitting its huge data centers wi

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