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).

GL events is an international provider of event solutions and services. Co. operates in three segments of the event industry market: the organization of trade fairs, conventions and events(Co. organizes proprietary trade shows); the management of venues(Co.'s venues are managed under concession agreements or long-term public-private partnerships); and services for events(Co. equips and installs every type of event). Co. assists companies, institutions, and event organizers at every stage of the process from the definition of their event strategies to final implementation in the field.

Societe Industrielle d'Aviation Latecoere and its subsidiaries are engaged in the manufacture of parts and equipment for the aeronautic and space industries. Co.'s products are mainly divided into 2 sectors: Airframe Structure and Equipment & Systems. Airframe Structure: manufactures Fuselage and Wing Structure Elements such as tail cones, forward upper shells, side parts, front spar bulkheads, nose sections, passenger doors, flaps; Nacelle Structure Elements such as fan cowls, tail engine fan cowls, translating sleeves, thrust reverser beams. Equipment & Systems: manufactures on-board electric racks, harnesses, landscape video camera system, pilot control panels and battery charge limiters.

Voluntis SA is a France-based company specialized in medical solutions. The Company designs prescription applications that embed medical intelligence in the smart phones of people suffering from chronic and rare diseases. Voluntis SA develops digital solutions for diabetes, respiratory diseases, cancer, anticoagulation and hemophilia. Its product portfolio includes Insulia, a prescription-only medical device, which is a digital therapeutic for people with type 2 diabetes who are being treated with long-acting basal insulin. The medical device also provides patients with insulin dose recommendations and educational coaching messages based on blood glucose values and other diabetes-related data; Theraxium platform, which is a flexible platform that transforms health data into medical intelligence, and Quality and Regulatory Expertise, which focuses on patient safety, among others.