T-Mobile US (TMUS) - Market capitalization

Market cap: A$342.34 Billion

As of January 2026 T-Mobile US has a market cap of A$342.34 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.

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

End of year Market Cap

Year	Marketcap	Change
2025	A$337.72 B	-18.83%
2024	A$416.09 B	52.89%
2023	A$272.15 B	6.33%
2022	A$255.95 B	28.1%
2021	A$199.81 B	-8.2%
2020	A$217.67 B	126.79%
2019	A$95.97 B	25.03%
2018	A$76.76 B	13.43%
2017	A$67.68 B	2.95%
2016	A$65.74 B	49.59%
2015	A$43.94 B	65.34%
2014	A$26.58 B	-12.11%
2013	A$30.24 B	767.43%
2012	A$3.48 B	13.69%
2011	A$3.06 B	-30.54%
2010	A$4.41 B	47.37%
2009	A$2.99 B	-59.35%
2008	A$7.37 B	-4.83%
2007	A$7.74 B
2026	A$342.34 B	1.37%

End of Day market cap according to different sources

On Dec 31st, 2025 the market cap of T-Mobile US was reported to be:

A$340.24 Billion

by Nasdaq

A$342.34 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Verizon VZ	A$257.29 B	-24.84%	🇺🇸 USA
AT&T T	A$266.10 B	-22.27%	🇺🇸 USA
Telephone and Data Systems TDS	A$7.09 B	-97.93%	🇺🇸 USA
Spok Holdings SPOK	A$0.40 B	-99.88%	🇺🇸 USA
U.S. Cellular USM	A$9.92 B	-97.10%	🇺🇸 USA
America Movil AMX	A$93.33 B	-72.74%	🇲🇽 Mexico
Shentel SHEN	A$0.95 B	-99.72%	🇺🇸 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: A$342.34 Billion