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

Microsoft Chairman and CEO Satya Nadella speaks in front of the OpenAI logo at the Microsoft Build conference in Seattle, Washington, on May 19, 2025.The $4 trillion club has a second member, at least based on after-hours trading. Following a better-than-expected earnings report on Wednesday, Microsoft shares jumped 8%, lifting the software giant's market cap to about $4.1 trillion. Should the rally stick on Thursday, Microsoft would join chipmaker Nvidia, which hit $4 trillion for the first time earlier th ...