Alten is a holding company. Through its subsidiaries, Co. operates in three areas: Engineering and Technology Consulting (ETC), Telecoms Networks and Multimedia, and Information Systems (NTIS). Through the Engineering and Technology Consulting (ETC) segment, Co. studies and designs technology products for technical divisions in industry and telecoms. The Telecoms Networks and Multimedia segment focuses on Product design, Architecture, deployment, and operation of networks. Lastly, the IT systems segment comprises Applications and software development, and Infrastructure and Telecoms (Applications, systems and networks Corporate telecommunications).

Emmi AG Luzern is a Swiss milk processor. In Switzerland, Co. focuses on the development, production and marketing of a full range of dairy and fresh products as well as the production, ageing and trade of primarily Swiss cheeses. Outside Switzerland, Co. concentrates on brand concepts and specialities in European and North American markets. Co.'s customers are primarily the retail trade, the food service sector and the food industry.

Freenet is a telecommunications provider in Germany. Co. provides its customers a portfolio of services and products, particularly in the field of mobile voice and data services. Co. does not operate its own network, but markets mobile communication services for the mobile network operators Telekom, Vodafone, E-Plus and O2 in Germany, under its own name and on its own account. Apart from its own network-independent postpaid, no-frills and prepaid services, Co. also provides the original network operators' tariffs. Co. operates within two segments: mobile communications and other/holding.

Gerresheimer is a holding company. Through its subsidiaries, Co. manufactures glass and plastic products for the pharma and healthcare industry. Co.'s operates in three divisions: Plastics & Devices, which its product portfolio includes products for the administration of medicines, such as insulin pens, inhalers, and prefillable syringes; Primary Packaging Glass, which produces glass primary packaging for medicines and cosmetics, such as pharma jars, ampoules, injection vials, cartridges, perfume flacons, and cream jars; and Life Science Research, which produces laboratory glassware for research, development, and analytics, such as beakers, Erlenmeyer flasks, and measuring cylinders.

Mobilezone Holding is a holding company. Co., through its subsidiaries is engaged in the mobile and fixed-line telecommunications sector. Co. maintains agreements with three providers active in Switzerland that pay provisions to Co. for its activities in soliciting new customers and subscription extensions. Co. maintains two divisions: Retail and Service Providing. The Retail division is a supplier of cellular telephone products and services; an advisor to small and mid-sized companies; active in e-commerce, and is a telecommunications products wholesaler. The Service Providing division offers fixed-line services; manages call centers and provides subscriptions on Orange network.

Sopra Steria Group is a global player in IT services, with operations in consulting, software development, and integration. In addition to France, Co. operates in the United Kingdom, Spain, Italy, Switzerland, Germany, and Belgium, assisting its clients in managing the transformation of their businesses and information systems. Co. divides its operation into three categories: Consulting, Systems and Solutions Integration, and Software Development; which it spreads among eight major verticals: Financial Services, Insurance and Social Welfare, Public Sector, Telecom Operators, Aerospace and Defense, Energy, Transport and Courier Services, and Retail.