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).

Derichebourg provides services to businesses and to local and municipal authorities. Co. covers the entire waste recycling chain, from collection through to recuperation, as well as a range of services to businesses and to local and municipal authorities. Co.'s activities can be divided into three segments: Environmental Services segment which is engaged in the processing and disposal of waste and of end-of-life products; Business Services segment which offers a range of front end services (reception, cleaning, energy, parks and gardens maintenance, temporary workers) and Airport Services segment which provides outsourced airport services like services for stopover management and airfreight.

Gaztransport & Technigaz is an engineering company specialized in membrane containment systems for liquefied gas transport and storage. Co. designs and markets technologies which combine operational efficiency and safety to equip liquefied natural gas (LNG) carriers, LNG floating platforms and multi-gas transport vessels. Co. also provides solutions for onshore storage tanks and the use of LNG as a fuel for vessels propulsion as well as a wide range of services in engineering, consultancy, training, maintenance assistance and technical studies at each stage of the liquefied gas chain.

Manitou BF is active on the global market for material handling. Co. divides its activities into three divisions: Rough Terrain Handling (RTH) where Co. assembles and distributes rough terrain handling equipment such as masted forklift trucks and fixed and rotating telescopic forklift trucks; Industrial Material Handling (IMH) where Co. designs and distributes semi-industrial masted forklift trucks; industrial forklift trucks; truck-mounted forklifts; and Compact Equipment (CE) where Co. designs, assembles and distributes skid steer loaders, telescopic forklift trucks, articulated loaders and mini excavators. Co.'s brands include Manitou®, Gehl®, Mustang®, Loc®, Edge®.

Ses Imagotag SA Formerly known as Ses-Imagotag SA. Ses Imagotag SA is a France-based company, which designs and markets electronic shelf labeling systems for food and non-food retail industries. The Company's solutions include store electronic systems (SES), electronic labels, software, radio and mounting systems. The Company's solutions are designed for every type of retail environment, including hypermarkets, supermarkets, electronics stores, garden centers, pharmacies and service stations. The Company's products are distributed in approximately 50 countries worldwide. Ses Imagotag SA's main clients include Intermarche, E. Leclerc, Monoprix, Groupe Casino, Carrefour and Auchan. The Company has a global presence, through its own subsidiaries and representations, in Italy, Spain, the United Kingdom, Scandinavia, Canada, Mexico and Singapore, as well as more than 60 international partners. It operates through imagotag GmbH, a manufacturer of electronic components.

SoluCom is a management and IT consulting company. Co.'s consulting services are divided into six main areas of expertise: Strategy and management (supporting company in its customer development strategy); IT Transformation (bringing the IT systems in line with corporate strategy and business requirements); IT Governance (improving both economic and operational performance); Telecoms and innovation (providing value through new communication services); IT Architecture (offering a service-oriented approach); Security and risk management (managing risks and keeping IT compliant with regulations).