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).

AMS provides advanced sensor and analog solutions for high value and emerging markets. Co.'s markets include Consumer and Communications and Industrial, Medical, Automotive. Co. delivers a broad range of innovative technology solutions for consumer electronics and communication device manufacturers including intelligent light sensors, MEMS microphone ICs, NFC solutions, active noise-cancelling ICs and ultra-low power management solutions. Co. offers customized, application-specific integrated circuits and standard solutions for a broad range of industrial applications including automation and control, position sensors, building automation, security and high-resolution seismic analysis.

ECA Sa. ECA SA is a France-based company which designs and delivers robotic equipment and intelligent solutions for both civil and military application. The Company offers vehicles and crafts for detection, inspection and destruction of mines, inspection systems for nuclear power plants, control and command systems, as well as ground and land robots for anti-terrorist missions and others. ECA SA is split into three divisions: Robotics and Integrated Systems, Simulation and Aeronautics. The Company has several subsidiaries, including, ECA CSIP, ECA CNAI, ECA Faros and ECA Sindel, among others. As of December 31, 2011, ECA SA was 56.4%-owned by Groupe Gorge.

Groupe Crit provides HR solutions to companies. Co.'s activities are divided into three segments: Temporary employment and Recruitment; Airport services; and Other services. In the Temporary employment and Recruitment segment, Co.'s offering includes temporary employment, permanent placement, secondment, outsourcing, training and consulting. The Airport services segment includes all services performed on an airplane from its landing to its take-off such as services to passengers and airplanes. The Other services segment comprises services in engineering and maintenance, and miscellaneous activities. At Dec 31 2010, Co. operated 431 branches, and was the partner of more than 25,000 companies.

Groupe Gorge is a holding company engaged in three areas of operation: Smart Safety Systems (develops Smart Safety Systems designed to operate in hostile and constrained environments for civil and defense sectors); Protection in Nuclear Environments (protection solutions in nuclear environments: shielding by partition systems in nuclear power stations & protection against radiation for staff working in nuclear environments); and Industrial Project Services (industrial projects and maintenance, creating production tools and turnkey operation areas, projects and services in industrial robotics, iron works, automation, 3D printer offerings, electricity and fire fighting systems).

Lagardere Groupe is a holding company. Through its subsidiaries, Co. is engaged in the media industry (news, education, culture and entertainment businesses). Co.'s main activities in the media industry can be divided into four separate divisions. Lagardere Publishing includes Co.'s Book Publishing and e-Publishing businesses. Lagardere Active encompasses Co.'s Magazine Publishing, Audiovisual (Radio, Television, Audiovisual Production), Digital and Advertising Sales Brokerage businesses. Lagardere Services encompasses the Travel Retail and Distribution businesses. Lagardere Unlimited specializes in sports and entertainment.

Mauna Kea Technologies is a global medical device company based in France. Co. is focused on innovations in the field of endomicroscopy (microscopic imaging during endoscopy procedures). Co. is predominately active in the advent of optical biopsy. Co. researches, develops and markets innovative tools to visualize and detect cellular abnormalities during endoscopic procedures. Co.'s flagship product, Cellvizio®, a probe-based Confocal Laser Endomicroscopy (pCLE) system, provides physicians and researchers high-resolution cellular views of tissue inside the body. Co. has marketing authorizations in Thailand, United Kingdom, U.S., Brazil, Chile, South Korea, Poland, Russia and Saudi Arabia.

Mediawan was incorporated as a Special Purpose Acquisition Company for the purpose of acquiring one or more operating businesses or companies in the traditional and digital media content and entertainment industries in Europe. Through it's subsidiary, Groupe AB, Co. is an independent publisher, producer and distributor of audiovisual content in French-speaking Europe. Its main activities are producing and distributing TV series, TV films, cartoons and documentaries as well as publishing TV channels and related digital services. The group has a portfolio of 19 channels, which are distributed in French-speaking Europe and Africa.

Prodways Group SA. Prodways Group SA is a France-based company engaged in the industrial machinery sector. The Company focuses its activities on the industrial three-dimensional (3D) printing market and more specifically on ''rapid manufacturing'' 3D printing for industrial series production. The Company designs, manufactures and sells products for various industries, including automotive, dental, molding, medical, jewelry and luxury, aerospace and defense, architectural and design, consumer products and academic and research. It offers its customers multi-technology, multi-application industrial solutions, 3D printing systems and a wide range of composite, hybrid and powder products. In addition, it also develops its own manufacturing for the podiatry (orthopaedic soles) and dentistry (orthodontic pieces and dental trays) markets that is sold directly to healthcare professionals. It operates through Avenao Industrie and Interson-Protac.