T-Mobile US (TMUS) - Market capitalization

Market cap: £177.05 Billion

As of December 2025 T-Mobile US has a market cap of £177.05 Billion. This makes T-Mobile US the world's 66th 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.

Market cap history of T-Mobile US from 2007 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	£177.05 B	-14.15%
2024	£206.23 B	41.71%
2023	£145.54 B	1.09%
2022	£143.97 B	34.15%
2021	£107.32 B	-12.6%
2020	£122.79 B	139.62%
2019	£51.24 B	20.28%
2018	£42.60 B	8.97%
2017	£39.09 B	1.8%
2016	£38.40 B	77.77%
2015	£21.60 B	54.62%
2014	£13.97 B	-14.56%
2013	£16.35 B	629.55%
2012	£2.24 B	10.8%
2011	£2.02 B	-30.36%
2010	£2.90 B	74.68%
2009	£1.66 B	-53.13%
2008	£3.54 B	4.1%
2007	£3.40 B

End of Day market cap according to different sources

On Dec 6th, 2025 the market cap of T-Mobile US was reported to be:

£175.96 Billion

by Nasdaq

£177.05 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Verizon VZ	£131.92 B	-25.49%	🇺🇸 USA
AT&T T	£135.65 B	-23.38%	🇺🇸 USA
Telephone and Data Systems TDS	£3.41 B	-98.07%	🇺🇸 USA
Spok Holdings SPOK	£0.20 B	-99.89%	🇺🇸 USA
U.S. Cellular USM	£4.97 B	-97.19%	🇺🇸 USA
America Movil AMX	£48.69 B	-72.50%	🇲🇽 Mexico
Shentel SHEN	£0.46 B	-99.74%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Market capitalization of T-Mobile US (TMUS)

Market cap: £177.05 Billion