Groupe Bruxelles Lambert is a holding company. Through its subsidiaries, Co. operates through the following segments: Imerys, which consists of the Imerys group that operates in four business lines of energy solutions and specialties, filtration and performance additives, ceramic materials, and high resistance minerals; and Financial Pillar, which includes, on the one hand, under investment activities, the companies Sienna Capital, Ergon Capital Partners (ECP), ECP II, ECP III, PAI Europe III, Sagard, Sagard II and Sagard III, Kartesia and Merieux Participations I and II and, on the other hand, under consolidated operating activities, the operating subsidiaries of ECP III.

Solvay is engaged in chemical and plastic businesses worldwide. Co. offers chemical products such as advanced materials, barium strontium, calcium chloride, caustic soda, chlorinated products, fluor, peroxygen products, polyglycerols, precipitated calcium carbonate, soda ash, and sodium bicarbonate. It also provides specialty polymers, such as Spire ultra polymers, Solviva biomaterials, and sulfone polymers. Co. structures its activities around five operating segments: Advanced Formulations, Advanced Materials, Performance Chemicals, Functional Polymers and Corporate & Business Services, each with its own specific business model and each comprised of Global Business Units (GBUs).