Microsoft became the world’s largest company by market capitalization in January 2024 after an AI-driven share rise.
Microsoft briefly overtook Apple in January 2024, with its market value supported by investor enthusiasm for artificial-intelligence products and its partnership with OpenAI. The ranking depended on live share prices and changed again during later trading periods.
Microsoft’s AI strategy was tied to Azure cloud services, software products using generative AI, and its investment in OpenAI. These developments added to the company’s existing businesses in operating systems, productivity software, gaming, and enterprise technology.
A market-cap ranking compares publicly traded equity values, not total economic output or annual revenue. Apple and Microsoft are both multinational technology companies, but their revenue mixes differ: Apple is strongly associated with devices, while Microsoft is heavily focused on software and cloud services.