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Ranking · Activities of professional membership organisations
Activities of professional membership organisations: largest employers
100 Belgian companies in the sector (NACE 9412) report employees in recent accounts; here are the top 20. GS1 leads with 38.3 FTE (financial year 2024).
Top 20
Ranked by average headcount (FTE) reported in the latest filed accounts (accounts less than 3 years old).
Rank by Total assets Revenue Headcount
# Company
Total assets Revenue
Equity FTE Year
1
GS1
1050 Ixelles €35.7m
301,741 €
€6.87m
38.3
2024
2
Fédération des Maisons Médicales et des Collectifs de Santé Francophones
1000 Brussels €3.63m
35,315 €
€1.93m
35.0
2025
3
Mederi
9300 Aalst €10.6m
— €7.08m
30.7
2025
4
Domus Medica
2018 Antwerp €3.77m
— €1.33m
27.3
2025
5
Wilfried Martens Centre for European Studies
1000 Brussels €3.39m
— €1.21m
27.3
2025
6
European Cancer Organisation
1040 Brussels €8.46m
— €2.43m
26.0
2025
7
European Landowners Organization
1000 Brussels €2.20m
— 125,393 €
26.0
2025
8
Fédération des Services sociaux
1070 Anderlecht €1.10m
— 780,244 €
25.9
2025
9
Belgisch Centrum voor Farmacotherapeutische Informatie-Centre Belge d'Information Pharmacothérapeutique
1210 Saint-Josse-ten-Noode €2.33m
— €1.55m
23.7
2025
10
De Europese Vereniging voor Humane Reproductie en Embryologie
1853 Grimbergen €22.0m
— €21.5m
23.1
2025
11
Santhea
1170 Watermael-Boitsfort €4.86m
33,685 €
€1.66m
21.7
2025
12
Union Europeenne des Medecins Specialistes
1040 Brussels €8.78m
— €8.36m
18.8
2025
13
Health Care Without Harm Europe
1000 Brussels €2.22m
— 133,919 €
18.6
2025
14
European Digital Rights
1040 Etterbeek €5.98m
— 891,595 €
18.4
2025
15
medicines for europe
1050 Ixelles €3.68m
— €2.52m
18.0
2025
16
Commission Européenne du Tourisme
1000 Brussels €2.85m
— €1.28m
16.3
2025
17
Plate-Forme Bruxelloise pour la Sante Mentale
1000 Brussels €2.04m
— 323,185 €
15.6
2025
18
Centre de Reference en Sante Mentale
5000 Namur 546,993 €
— 374,599 €
15.6
2025
19
Union Pharmaceutique du Hainaut Occidental et Central
7080 Frameries €7.81m
€1.87m
€7.30m
14.7
2025
20
Federation des Restos du Coeur de Belgique - Federatie der Belgische Resto du Coeur
5380 Fernelmont €5.98m
— €5.35m
14.3
2025
← The whole Activities of professional membership organisations sector
Frequently asked questions
Who is the largest employer in Activities of professional membership organisations? GS1, with 38.3 full-time equivalents reported (financial year 2024).
How many Activities of professional membership organisations companies report employees? 100 out of 198, in accounts less than 3 years old.
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Active companies (legal entities) that have filed at least one set of annual accounts, based on the Crossroads Bank for Enterprises and the National Bank of Belgium. The sector is the main activity in the register; the municipality is that of the registered office. Data updated on 13 Nov 2026.