DBV Technologies is a clinical-stage specialty biopharmaceutical company focused on immunotherapy. Co.'s therapeutic approach is based on epicutaneous immunotherapy (EPIT), its proprietary method of delivering biologically active compounds to immune systems through intact skin using a platform called Viaskin. Viaskin is an electrostatic patch that offers a self-administered, non-invasive immunotherapy to patients. Once applied on intact skin, Viaskin forms a condensation chamber that hydrates the skin and solubilizes the antigen, allowing it to penetrate the epidermis, where it's captured by Langerhans cells. Co.'s patients include infants and children suffering from severe food allergies.

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.