CFE is engaged in civil engineering, buildings and industrial construction, dredging works and electrical installations. Co. is also engaged in property development, environmental protection and building management. Co.'s works carried on by Co.'s civil engineering group includes the following: hydraulic engineering, harbor works, bridges, and other engineering works, tunnels, road construction, dams, storage tanks, piping and drainage and caissons sunken soft soil. Co.'s buildings and industrial construction sector is active in the following fields: administrative buildings, industrial construction, public utility buildings, redevelopment, and residential buildings.

Compagnie du Bois Sauvage SA, (also CBS), is a Belgium-based holding company that invests in both listed and unlisted companies. The Company provides assistance in financial management, structural development and capital stability to the companies in which it invests. The Company's portfolio is based on three separate pillars: a Real Estate sector, a Long-Term Investment division composed of strategic participating interests and a Cash Portfolio focused on liquid values that serve as a basis for derivatives activity. As of December 31, 2011, CBS had a number of wholly owned subsidiaries, such as Parfina, CBS Services, Neuhaus and CBS Nederland and affiliated companies, including Cofinimmo, Ceran, Codic, Noel Group, among others. In March 2014, it acquired Chocolate-Maker Corne Port Royal, sold its stake in Ceran and a real estate property in Luxembourg.

Compagnie Immobiliere de Belgique SA (Immobel) is a Belgium-based company active in the real estate development sector. The Company operates in three lines of business in Belgium, Luxembourg and Poland, such as office properties, the residential sector and land banking. Its clients include: the state, the European Union (EU) and/or institutional investors for office complexes; private clients for residential property and land purchases, as well as private clients looking to invest in housing. The Company's main projects in Belgium include Belair, Black Pearl, Parc Seny, Gateway, Bella Vita and Chastre Rue Du Chene. Its main projects in Luxembourg include Westside Village, Green Hill and Galerie Kons. Finally its main projects in Poland include Cedet, CBD One and Okraglak.

Euronav is a provider of maritime shipping and offshore services engaged primarily in the transportation and storage of crude oil. As of Apr. 4, 2017, Co. owned and operated a modern fleet of 55 vessels (including four chartered-in vessels) with an aggregate carrying capacity of approximately 13.7 million deadweight tons, or dwt, consisting of 31 very large crude carriers, one ultra large crude carrier, 21 Suezmax vessels, and two floating, storage and offloading vessels. Co. has two operating segments: the operation of crude oil tankers on the international markets (tankers) and the floating production, storage and offloading operations.

IBA- Ion Beam Applications develops and markets technologies and pharmaceutical products for the healthcare sector, with a focus on cancer diagnosis and therapy. Co. is also engaged in the sterilization and ionization market. Co. operates in two primary business segments: Equipment and Pharmaceuticals. Co.'s Equipment segment encompasses development, fabrication, and services associated with medical and industrial particle accelerators, proton therapy systems, and a range of dosimetry products, while Co.'s Pharmaceuticals segment encompasses the production and distribution of radiopharmaceutical agents as well as its bioassay operations.