Microsoft reclaims $4 trillion market cap Daniel Howley · Technology Editor Mon, October 12, 2026 at 10:22 AM EDT 1 min read MSFT +1.05% NVDA -1.41% AAPL +1.28% GOOG +0.87% AMD -3.33% Explore stocks on Coinbase Trading disclosure Trading disclosure The above button links to Coinbase. Yahoo Finance is not a broker-dealer or investment adviser and does not offer securities or cryptocurrencies for sale or facilitate trading. Coinbase pays us for certain activity generated through this link. Prices displayed are informational.
Microsoft (MSFT) stock climbed higher in early morning trading on Monday, helping propel the company's market capitalization above the $4 trillion mark, joining the likes of Nvidia (NVDA), Apple (AAPL), and Google (GOOG, GOOGL), which have also eclipsed the number.
Microsoft first reached the milestone in July 2025 but fell below it late that October amid concerns about the hyperscaler's AI spending and whether it would see a return on its investments, dampening investor enthusiasm.
Those fears have continued to die down as Microsoft and its rivals post strong quarterly earnings results.
Go deeper with AlphaSpace 540.67 +5.60 (+1.05%) As of 11:00:46 AM EDT. Market Open. The stock move comes on the same day Microsoft revealed its Azure Maia 300 AI chip at the OCP Global Summit in San Jose, Calif.
The processor is part of the company's effort to reduce its dependence on Nvidia and AMD's AI chips.
Microsoft also showed off its new Surface Laptop Ultra alongside partner Nvidia last week. The laptop is designed to let customers run high-powered AI models without connecting to the cloud.
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