Microsoft looks poised to open Thursday with a market valuation above $4 trillion, after reporting strong earnings boosted by AI demand. That would make it the second company to achieve such a milestone,

Eight American companies are worth $1 trillion or more, but only Nvidia, Microsoft, and Apple have surpassed the $3 trillion milestone so far. Meta Platforms could join that exclusive club thanks to its efforts in the artificial intelligence (AI) space, which are transforming its social media business.