Drillisch is a holding company. Co. through its subsidiaries, is a mobile virtual network operator in Germany. The services acquired from the network operators Telekom Deutschland GmbH, Vodafone D2 GmbH, E-Plus Mobilfunk GmbH and Telefonica O2 Germany GmbH & Co. OHG are sold further to the end consumers for Co.'s own account and at rates established by Co. Co. organizes its operations into three segments: telecommunications, which includes its activities in the sector of wireless services; freenet holding, which comprises the operations of its freenet AG subsidiary; and software services, which involves activities related to the development and marketing of a workflow management software.

United Internet AG is a Germany-based Internet service provider (ISP) and holding company of the United Internet Group. The Company's products and technical services are divided into two key segments. The Access segment comprises narrowband, broadband and mobile access subscriptions, including the corresponding applications. The Applications segment includes such applications as home pages, e-shops, Personal Information Management applications, group work, online storage and office software. The Application segment also includes the operations of the Company's brands Sedo and affilinet, which serve customers performance-based advertising and sales possibilities. The Company's brand portfolio also includes GMX, WEB.DE, 1&1, united-domains, Fasthosts and InterNetX. In addition, the Company develops Internet based applications, such as cloud applications. The Company acts primarily via its wholly owned subsidiary 1&1 Internet AG, and Sedo Holding AG, in which it holds a majority stake.