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.

Facebook is building and engaging products that enable people to connect and share with friends and family through mobile devices, personal computers, virtual reality headsets, and in-home devices. The company's products include: Facebook, which enables people to connect, share, discover, and communicate with each other on mobile devices and personal computers; Instagram, which is a place where people can express themselves through photos, videos, and private messaging, and explore their interests in businesses, creators and communities; Messenger and WhatsApp, which are messaging applications; and Oculus, which connects people through its Oculus virtual reality products.

Frontier Communications is a holding company. Through its subsidiaries, the company is a provider of communications services. The company conducts business with both consumer and commercial customers. For consumer customers, the company provides broadband, video, voice and other services and products. The company delivers these services over a combination of fiber and copper-based networks. The company's commercial customers consist of: small, medium and larger enterprise customers, whereby the company provides services including broadband service, Ethernet service, circuit-based services, SD-WAN, and managed Wi-Fi; and wholesale customers, which buy both voice and data services to supplement their own network infrastructure.

Microsoft is a technology company. The company develops and supports software, services, devices, and solutions. The company provides an array of services, including cloud-based solutions as well as solution support and consulting services. The company also delivers relevant online advertising. The company's products include operating systems; cross-device productivity applications; server applications; business solution applications; desktop and server management tools; software development tools; and video games. The company also designs, manufactures, and sells devices, including personal computers, tablets, gaming and entertainment consoles, other devices, and related accessories.

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.