Microsoft became the second publicly traded company to surpass a US$3 trillion market capitalization in January 2024.
Microsoft briefly exceeded US$3 trillion on January 24, 2024, following a strong rise in its share price. Apple had been the first company to reach that valuation, doing so in January 2022.
Investor enthusiasm centered on Microsoft’s cloud business, its enterprise software base, and its partnership with OpenAI. Microsoft integrated generative-AI features into products such as Azure and Microsoft 365, helping position the company at the center of the AI investment cycle.
The ranking was not permanent: Apple and Microsoft traded places as market leaders at different times. Because market capitalization changes with stock prices, the milestone describes a moment in financial-market history rather than a fixed corporate status.