Amazon.com serves consumers through its online and physical stores. The company also manufactures and sells electronic devices, including Kindle, Fire tablet, Fire TV, Echo, and Ring, and the company develops and produces media content. The company operates customer service centers and provides programs that enable sellers to grow their businesses, sell their products in its stores, and fulfill orders through the company The company serves developers and enterprises of various sizes, including start-ups, government agencies, and academic institutions, through its Amazon Web Services segment, which provides a set of global compute, storage, database, and other service offerings. The company also provides services, such as advertising.

AT&T is a holding company. Through its subsidiaries, the company is a provider of telecommunications, media and technology services. The company's Communications segment provides wireless and wireline telecom, video and broadband services. The company's WarnerMedia segment includes media and entertainment businesses that principally develop, produce and distribute feature films, television content, and other content globally; and operate digital media properties. The company's Latin America segment provides entertainment services in Latin America and wireless services in Mexico. The company's XANDR segment relies on using data from its customer relationships, to develop digital and video advertising that is relevant to consumers.

Charter Communications is a holding company. Through its subsidiaries, the company is a cable operator and a broadband communications company providing video, Internet and voice services. The company also provides its mobile service to residential customers. In addition, the company sells video and online advertising inventory to local, regional and national advertising customers and communications and managed solutions to enterprise customers. The company also owns and operates regional sports networks and local sports, news and community channels. The company owns and operates a two-way telecommunications network which passes various households and small and medium businesses across United States.

Comcast is a media and technology company. The company's segments are: Cable Communications, which provides internet, video, voice, and security and automation services in the United States individually and as bundled services at a discounted rate over its cable distribution system to residential and business customers; NBCUniversal, which includes a portfolio of national cable networks that provide a variety of entertainment, news and information, and sports content, regional sports and news networks, international cable networks, and cable television studio production operations; and Sky, which owns a portfolio of pay television channels that provide entertainment, news, sports and movies.

DISH Network is a holding company. Through its subsidiaries, the company operates two business segments: Pay-TV and Wireless. The company provides pay-TV services under: the DISH? brand, which consists of, among other things, Federal Communications Commission licenses authorizing the company to use direct broadcast satellite and Fixed Satellite Service spectrum, the company's owned and leased satellites, and certain other assets utilized in the company's operations; and the Sling? brand, which consists of, among other things, live-linear streaming over-the-top Internet-based domestic, international and Latino video programming services. In addition, the company invests to acquire certain wireless spectrum licenses and related assets.

T-Mobile US provides mobile communications services, including voice, messaging and data, under its brands, T-Mobile and Metro? by T-Mobile, in the United States, Puerto Rico and the United States Virgin Islands. The company provides mobile communications services using its 4G Long-Term Evolution network and its 5G technology network. The company also provides various wireless devices, including handsets, tablets and other mobile communication devices, and accessories for sale, as well as financing through Equipment Installment Plans and leasing through JUMP! On Demand?. The company provides reinsurance for handset insurance policies and extended warranty contracts offered to its mobile communications customers.

Verizon Communications is a holding company. Through its subsidiaries, the company provides communications, information and entertainment products and services to consumers, businesses and governmental agencies. The company has two reportable segments, Verizon Consumer Group (Consumer) and Verizon Business Group (Business). The company's Consumer segment provides consumer-focused wireless and wireline communications services and products under the Verizon brand and through wholesale and other arrangements. The company's Business segment provides, among others, wireless and wireline communications services and products, video and data services, corporate networking solutions, security and managed network services.