Microsoft became the first US company to close a trading day above US$2 trillion in market value after Apple.
Microsoft closed above the US$2 trillion threshold on June 24, 2021. Apple had reached the milestone earlier, in August 2020, so Microsoft was the second US company to achieve it and the first to do so after Apple.
The valuation reflected Microsoft’s transformation from a software-focused business into a broad technology platform. Windows and Office remained important, while Azure cloud computing, enterprise subscriptions, gaming, and professional networking added major sources of growth.
A closing market capitalization differs from an intraday valuation: a share price may briefly cross a threshold and finish below it. Microsoft’s milestone is therefore commonly described using the closing value. Market-cap rankings can also change quickly when large technology companies move by only a few percentage points.