T-Mobile US (TMUS) - Market capitalization

Market cap: S$305.61 Billion

As of December 2025 T-Mobile US has a market cap of S$305.61 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	S$305.61 B	-13.13%
2024	S$351.79 B	43.66%
2023	S$244.88 B	4.87%
2022	S$233.50 B	19.23%
2021	S$195.84 B	-11.55%
2020	S$221.42 B	144.41%
2019	S$90.59 B	22.62%
2018	S$73.88 B	4.54%
2017	S$70.67 B	3.04%
2016	S$68.58 B	51.45%
2015	S$45.28 B	57.56%
2014	S$28.74 B	-15.9%
2013	S$34.17 B	671.38%
2012	S$4.43 B	8.8%
2011	S$4.07 B	-29.51%
2010	S$5.77 B	52.9%
2009	S$3.77 B	-49.2%
2008	S$7.43 B	-23.67%
2007	S$9.74 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:

S$303.73 Billion

by Nasdaq

S$305.61 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Verizon VZ	S$227.70 B	-25.49%	🇺🇸 USA
AT&T T	S$234.15 B	-23.38%	🇺🇸 USA
Telephone and Data Systems TDS	S$5.89 B	-98.07%	🇺🇸 USA
Spok Holdings SPOK	S$0.34 B	-99.89%	🇺🇸 USA
U.S. Cellular USM	S$8.57 B	-97.19%	🇺🇸 USA
America Movil AMX	S$84.05 B	-72.50%	🇲🇽 Mexico
Shentel SHEN	S$0.80 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: S$305.61 Billion