Ackermans & Van Haaren is an investment company. Co. operates in five sectors: Marine Engineering & Infrastructure, which includes DEME NV, a dredging and marine company; Private Banking, which includes BDM NV - Continentale Verzekeringen NV (ASCO NV), which focuses on marine and industrial insurance via brokers; Real Estate, Leisure & Senior Care, which includes Extensa Group NV, a real estate developer; Energy & Resources, which includes Telemond Group, a supplier to the crane and automotive industry; and Development Capital, which is engaged in ICT and engineering, retail and distribution, real estate development, and media and printing.

Biocartis Group NV is a Belgium-based company, which specializes in the development of molecular diagnostic systems, especially for the treatment of cancers and infectious diseases, the products ensure the analysis of biomolecules associated with risk factors, early detection, treatment selection and monitoring of disease. The group has the Idylla system to deliver results within a period of between 35 to 150 minutes.

GIMV is a listed investment company, specializing in private equity and venture capital and active in small and medium buyouts, growth financing and technology investments. Co. is also present with technology investments across Europe and in Israel, Japan and the USA. Co. invests in ICT (Technology), environmentally friendly technology (Cleantech) and Life Sciences.

Royal Boskalis Westminster is a service provider operating in the dredging, dry and maritime infrastructure and maritime services sectors. Co. is involved in dredging activities and provides a range of maritime services for the offshore energy sector. In addition, Co. provides towage services as well as emergency response and salvage related services. Co.'s main clients are oil, gas and power companies, port operators, governments, shipping companies, international project developers, insurance companies and mining companies. Co. operates on behalf of its clients in over 75 countries across six continents.

Proximus supplies integrated telecommunications services on the Belgian market. Co.'s activities are divided into four segments: Consumer Business Unit (CBU), which sells voice products and services, internet and television, on fixed and mobile networks, to residential customers; Enterprise Business Unit (EBU), which caters to professional customers; Service Delivery Engine and Wholesale, which centralizes all the network and IT services and costs, provides services to CBU and EBU and sells these services to other telecom and cable operators; and International Carrier Services, which focuses on international carrier activities.