Microsoft Hits $4 Trillion Valuation as AI-Driven Growth Fuels Investor Optimism
Microsoft Corp. (MSFT) cemented its position as a tech titan with a $4 trillion market valuation following strong fiscal Q4 earnings, becoming only the second company ever to reach the milestone. The 8% after-hours stock surge reflects accelerating adoption of its AI-powered Copilot platform across 400 million Office 365 enterprise licenses.
The 50-year-old company continues evolving beyond legacy products like Windows and Office, with cloud computing and AI now driving growth. Copilot's integration across Microsoft's ecosystem—from document generation in Word to email summarization in Outlook—demonstrates how quickly AI capabilities are being operationalized at scale.