Microsoft tops $4 trillion in market cap after hours, joining Nvidia in exclusive club

In a remarkable turn of events following its latest earnings report, Microsoft has achieved a market capitalization of approximately $4.1 trillion, becoming the second member of the exclusive $4 trillion club. This surge came after a staggering 8% increase in its share price during after-hours trading on Wednesday. The tech giant's impressive performance was largely driven by an 18% growth in revenue, marking its most rapid expansion in over three years. A significant contributor to this growth was Microsoft's Azure cloud computing division, which for the first time disclosed its revenue in dollar terms. The cloud services sector alone brought in over $75 billion in fiscal 2025, reflecting a remarkable 34% increase from the previous year. As of the market close on Wednesday, Microsoft shares have risen 22% year-to-date, significantly outperforming the S&P 500 index, which has seen an 8% gain. The company's stock reached an all-time high of $513.71 on July 25 and has climbed to over $553 in extended trading. Microsoft's achievement places it alongside Nvidia, which recently crossed the $4 trillion threshold earlier this month. Both companies have emerged as frontrunners in the artificial intelligence sector, surpassing Apple, which currently stands at around $3.2 trillion. Apple's stock has dropped 17% this year, raising concerns among investors about its position in the evolving AI landscape. The tech giant is set to announce its quarterly results on Thursday. Among major technology companies, Nvidia has excelled in 2025, boasting a 33% increase. Its graphics processing units (GPUs) are crucial for the development of large language models by Microsoft, OpenAI, Google, and Meta, while also powering the data centers being constructed by these industry leaders. Nvidia is expected to release its results later this August.