T-Mobile US (TMUS) - Market capitalization

Market cap: C$326.62 Billion

As of December 2025 T-Mobile US has a market cap of C$326.62 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	C$326.62 B	-12.05%
2024	C$371.39 B	51.01%
2023	C$245.92 B	4.05%
2022	C$236.35 B	28.02%
2021	C$184.62 B	-13.49%
2020	C$213.41 B	143.16%
2019	C$87.76 B	19.14%
2018	C$73.66 B	10.89%
2017	C$66.43 B	4.31%
2016	C$63.68 B	43.39%
2015	C$44.41 B	75.93%
2014	C$25.24 B	-12.09%
2013	C$28.71 B	697.03%
2012	C$3.60 B	12.64%
2011	C$3.19 B	-28.65%
2010	C$4.48 B	58.31%
2009	C$2.83 B	-55.21%
2008	C$6.32 B	-6.39%
2007	C$6.75 B

End of Day market cap according to different sources

On Dec 4th, 2025 the market cap of T-Mobile US was reported to be:

C$324.61 Billion

by Nasdaq

C$326.62 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Verizon VZ	C$242.72 B	-25.69%	🇺🇸 USA
AT&T T	C$253.30 B	-22.45%	🇺🇸 USA
Telephone and Data Systems TDS	C$6.28 B	-98.08%	🇺🇸 USA
Spok Holdings SPOK	C$0.37 B	-99.89%	🇺🇸 USA
U.S. Cellular USM	C$9.24 B	-97.17%	🇺🇸 USA
America Movil AMX	C$91.70 B	-71.92%	🇲🇽 Mexico
Shentel SHEN	C$0.83 B	-99.75%	🇺🇸 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: C$326.62 Billion