These are the 10 biggest telecommunications companies by 12-month trailing (TTM) revenue. This list is limited to companies that are publicly traded in the U.S. or Canada, either directly or through ADRs. Some companies outside the U.S. report profits semi-annually instead of quarterly, so the 12-month trailing data may be older than it is for companies that report quarterly. The data in this story are from YCharts.com.1 All figures are as of January 12, 2021.

AT&T Inc. (T)
Revenue (TTM): $172.9 billion
Net Income (TTM): $11.1 billion
Market Cap: $204.4 billion
1-Year Trailing Total Return: -19.7%
Exchange: New York Stock Exchange
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AT&T is a holding company that provides communications and digital entertainment services globally. Its services and products include wireless communications, data/broadband and Internet services, digital video services, local and long-distance telephone services, telecommunications equipment, managed networking, and feature film, television, and gaming production and distribution. The company also owns and operates regional TV sports networks.

Verizon Communications Inc. (VZ)
Revenue (TTM): $128.4 billion
Net Income (TTM): $18.3 billion
Market Cap: $237.0 billion
1-Year Trailing Total Return: 1.7%
Exchange: New York Stock Exchange

Verizon Communications is a holding company that provides communications, information, and entertainment products and services. It offers wireless voice and data services and equipment sales, as well as data and video communications products and services, such as broadband video, data center and cloud services, security and managed network services, and local and long distance voice services.

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