Apple and Microsoft are now both worth more than four trillion dollars each. This is the first time Apple’s market capitalization has crossed the four trillion dollar mark, making it the third company to ever reach this milestone, after Nvidia and Microsoft.
Microsoft first crossed the mark in July, but its valuation later dropped slightly to 3.9 trillion dollars. It returned to the four trillion dollar level on Tuesday following news that it had signed a new agreement with OpenAI.
Apple’s growth has been impressive. It reached one trillion dollars in 2018, two trillion dollars in 2020, and three trillion dollars in 2022. Apple’s stock has soared following the launch of the iPhone 17 range, which appears to be outselling previous versions. The company is set to report its Q4 2025 results on Thursday, October 30.
Microsoft has also been thriving, thanks to demand for its Azure cloud service. The service offers OpenAI’s large language models as well as the computing power needed to train AI models. The company said on Tuesday that its roughly 27 percent stake in OpenAI was valued at about 135 billion dollars. The tech giant reports its quarterly results on Wednesday.
Alphabet, Google’s parent company, is getting close to the four trillion dollar milestone as well. It is currently trading at a market capitalization of 3.25 trillion dollars.

