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).

Carmila SA, formerly Cardety SA, is a France-based company that operates in the real estate investment sector. The Company is primarily engaged in the acquisition, holding and managing of commercial real estate assets for lease. The Company's real estate assets include a supermarket under the ED brand in Forges-les-Eaux, a shopping center in Pau Lescar, a retail park in Mondeville, a shopping mall in Besancon Chalezeule, a building complex in Salaise-sur-Sanne and a business park project in Quetigny.

Clasquin Group designs and supervises the entire overseas transport & logistics chain. Co. has two operating segments: air and sea freight forwarding and related services ("overseas freight") and IT service contractor ("IT services"). The air freight forwarding and related services ("overseas freight") segment comprises of three business lines: air freight forwarding and related services, sea freight forwarding and related services, other services not included in air and sea freight (including related services) are grouped into the "others" business line.

Groupe Open distributes and installs computer servers. Co. also provides associated computer technology services such as web integration and design, production and implementation of interactive information systems for companies.

Guerbet is a French pharmaceutical group that develops, markets, and provides maintenance services for medical equipment and devices destined for diagnostic and interventional imaging. Co.'s portfolio comprises media solutions covering MRI, X-rays and products devoted to International Radiology and Theranostics and medical devices. Co. organizes its operation by product family covering Magnetic Resonance Imaging (MRI), X-rays (XR) and Interventional Radiology and Theranostics (IRT). The MRI family includes Dotarem® and Artirem®; Co.'s X-ray product family includes Xenetix®, Optiray®/Optiject®, Oxilan®, and Telebrix®; and the IRT product family has Lipiodol®, Bleu Patente V and Hexabrix®.

Synergie is engaged in the development of human resources management, by providing services in the field of temporary work, outplacement, recruitment, consulting and training. Co. services different sectors: services and specialized sector (medical, senior employment, human services), transportation and logistics sector, industry sector, construction and civil engineering sector. As of Dec 31 2009, Co. is present in 13 countries in Europe and Canada and reports its activities geographically, in 4 areas: France, Northen and Eastern Europe, Southern Europe and Canada.

Transgene is a biopharmaceutical company that designs and develops immunotherapy and virotherapy products for the treatment of cancers and infectious diseases. Co. is developing three anti-cancer products that are in clinical trials: (cancer of the lungs, liver and oropharynx); two anti-infectious immunotherapy products also in clinical trials: (hepatitis B and C). Co. also has products in the pre-clinical development stage. Co. operates in a single business segment, the research and development of therapeutic vaccines and immunotherapy products. Co. does not have any products on the market. Substantially all of its operations are conducted in France.

Trigano designs, manufactures and sells leisure vehicles and leisure equipment. Co.'s operations can be divided into two segments: Leisure vehicles and Leisure equipment. The Leisure Vehicles segment produces motor caravans, caravans, mobile homes and accessories and provides services to its customers (leasing and financing of leisure vehicles). The Leisure Equipment segment produces trailers, camping equipment, and garden equipment. Co. operates in France, U.K., Italy, Germany, Belgium, Spain, Netherlands, Norway and Other countries.

Visiativ SA. Visiativ SA is a France-based company engaged in the information technology (IT) consulting and other services. The Company offers integration services for various enterprises, active in the fields of industry, retail and services. Its portfolio of solutions includes Aeronautics & Defense, Consumers goods, Industrial equipment, Transport & mobility, Life sciences, High technologies, Finance & services and Engineering & construction, among others. Visiativ SA operates through NC2 Network Computer Communication SASU (NC2), a Tour De Salvagny-based provider of data processing and hosting services and Solo Solution Autonome SAS, a Guilherand-Granges-based provider of computer systems design services.

Voltalia. Voltalia SA is a France-based holding company engaged in the renewable utilities sector. It designs, develops and operates electric power stations in numerous countries, such as France, French Guyana, Brazil, Greece and Morocco. The Company generates electricity using a variety of renewable energy sources. These include wind, water, biomass and solar power. In addition, Voltalia SA specializes in carbon credit trading activities. The Company operates several subsidiaries, including Anelia and Bio-Bar in France, Voltalia Guyane, SIG Kourou, SIG Mana and SIG Cacao in French Guyana, Voltalia Energia do Brasil in Brazil, Thegero in Greece and Alterrya Maroc in Morocco, among others. The Company is owned by Voltalia Investissement SA.