Deutsche Telekom is engaged in the telecommunications services and information technology sectors. Co. operates as an integrated telecommunications provider. It is organized into four operating segments: Germany, Europe, and the United States; and Systems Solutions, as well as Group Headquarters and Shared Services. Co. provides fixed-network lines, broadband lines and mobile communications. Co. also provides customized Information and Communication Technology (ICT) solutions for corporate customers under the T-Systems brand. The Group Headquarters and Shared Services segment comprises cross-segment management functions, real estate services, and mobility solutions, among others.

Swisscom is engaged in providing telecommunication services and is active in Switzerland and Italy. Co. has three operating divisions: Swisscom Switzerland, Fastweb; and Other Operating Segments. Co.'s Swisscom Switzerland divisions comprised of: Residential Customers; Small and Medium-Sized Enterprises; Enterprise Customers; Wholesale; and IT, Network & Innovation. Co.'s Fastweb segment supplies its fixed-network both directly via its own fiber-optic network and also via the unbundled fixed-access lines and wholesale products. Co.'s other operating segments provides ICT solutions for physicians, hospitals and insurers, develops and operates intelligent solutions for energy management.

Tele2 is engaged as a telecom operator. Co. provides mobile communication services, fixed broadband and telephony, data network services and content services. The mobile service comprises various types of subscriptions for residential and business customers as well as prepaid cards. Fixed broadband includes direct access, which is its own services based on access via copper cable and other forms of access, such as fibre networks, wireless broadband and metropolitan area networks. Fixed telephony includes resold products within fixed telephony. The product portfolio within resold fixed telephony consists of prefix telephony, pre-selection (dial the number without a prefix) and subscriptions.

Telenet Group Holding is a holding company. Through its subsdiairies and its broadband network, Co. is engaged in the provision of cable television, including television services, broadband internet and telephony services to residential subscribers in Flanders and certain communes in Brussels as well as broadband internet, data and voice services in the business market throughout Belgium and parts of Luxembourg. In addition, Co. is engaged in the provision of mobile telephony services through a mobile virtual network operator partnership with Mobistar NV.