As of January 2026 T-Mobile US has a market cap of โฌ194.48 Billion. This makes T-Mobile US the world's 71th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Dec 31st, 2025 the market cap of T-Mobile US was reported to be: