T-Mobile US (TMUS) - Market capitalization

Market cap: £141.72 Billion

As of August 2026 T-Mobile US has a market cap of £141.72 Billion. This makes T-Mobile US the world's 106th 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 2026

End of year Market Cap

Year	Marketcap	Change
2026	£141.72 B	-15.63%
2025	£167.97 B	-18.56%
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 Aug 11th, 2026 the market cap of T-Mobile US was reported to be:

£141.72 Billion

by Nasdaq

£141.72 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
AT&T T	£124.20 B	-12.36%	🇺🇸 USA
Verizon VZ	£145.30 B	2.53%	🇺🇸 USA
Spok Holdings SPOK	£0.17 B	-99.88%	🇺🇸 USA
Shentel SHEN	£0.54 B	-99.61%	🇺🇸 USA
America Movil AMX	£51.99 B	-63.31%	🇲🇽 Mexico
U.S. Cellular USM	£4.90 B	-96.54%	🇺🇸 USA
Telephone and Data Systems TDS	£2.83 B	-98.00%	🇺🇸 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: £141.72 Billion