Apple and Microsoft have both reached a market capitalization of over $4 trillion, marking a new milestone in the race among tech giants for valuation dominance. It’s the first time Apple has crossed the $4 trillion threshold, joining Nvidia and Microsoft as the only companies to ever reach that mark.
Microsoft, which first touched $4 trillion back in July 2025, briefly dipped below the level before regaining it this week. The company’s stock climbed again following news of a renewed agreement with OpenAI, reinforcing its position as a central player in the artificial intelligence ecosystem.
Apple’s trajectory has been strikingly steady. The company hit $1 trillion in 2018, $2 trillion in 2020, and $3 trillion in 2022, with this latest jump reflecting continued investor confidence in its hardware cycle and ecosystem stability. The launch of the iPhone 17 lineup appears to have reignited demand, with early sales reportedly outpacing those of its predecessors. Apple will release its fiscal Q4 2025 earnings on October 30, and analysts expect strong performance across its premium device segments.
Microsoft’s valuation strength stems from its rapid expansion in cloud and AI infrastructure. Its Azure platform has become a backbone for machine learning and large language model deployment, including OpenAI’s systems. The company recently disclosed that its 27 percent stake in OpenAI is now valued at roughly $135 billion — a figure that underscores just how tightly its fortunes are tied to the ongoing AI surge. Microsoft is set to report its quarterly results on Wednesday.
Alphabet, Google’s parent company, isn’t far behind in the trillion-dollar race, sitting at a market cap of about $3.25 trillion as of Tuesday. The company’s continued investment in AI, advertising technology, and cloud computing could see it join the $4 trillion club within the next cycle if current trends hold.
The simultaneous rise of Apple and Microsoft to this valuation tier highlights how concentrated global market power has become within a handful of U.S. technology companies. With AI, cloud computing, and hardware ecosystems driving investor optimism, the $4 trillion benchmark — once unthinkable — now looks increasingly like the new frontier for Big Tech.
