Activities of membership organisations: the largest companies in Flanders
As of 14 Nov 2026, 457 companies in Activities of membership organisations (NACE 94) in Flanders publish total assets in recent accounts (financial years 2023 to 2026). The top 10 account for €799.4m, out of €2.88bn for all of them; median total assets are 998,390 €. Centraal Initiatief voor Steun aan de Congregaties in het Aartsbisdom leads with €145.4m (financial year 2025).
Top 50 · Activities of membership organisations · Flanders
Ranked by total assets in the latest filed accounts. This is a size criterion, not an assessment.
Ranking based on each company's own annual accounts (statutory, not consolidated): a subsidiary and its parent appear separately, and the ranking differs from lists based on consolidated group accounts.
“—”: not published. Small companies (micro and abridged accounts) do not have to publish their revenue.
Activities of membership organisations across Belgium → All sectors · Flanders →
Other sectors · Flanders
- 01 Crop and animal production, hunting and related service activities5,114
- 02 Forestry and logging186
- 03 Fishing and aquaculture102
- 08 Other mining and quarrying88
- 09 Mining support service activities32
- 10 Manufacture of food products3,220
- 11 Manufacture of beverages386
- 12 Manufacture of tobacco products16
- 13 Manufacture of textiles704
- 14 Manufacture of wearing apparel300
- 15 Manufacture of leather and related products of other materials50
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials1,102
- 17 Manufacture of paper and paper products196
- 18 Printing and reproduction of recorded media1,328
- 19 Manufacture of coke and refined petroleum products18
- 20 Manufacture of chemicals and chemical products539
- 21 Manufacture of basic pharmaceutical products and pharmaceutical preparations281
- 22 Manufacture of rubber and plastic products561
- 23 Manufacture of other non-metallic mineral products952
- 24 Manufacture of basic metals246
- 25 Manufacture of fabricated metal products, except machinery and equipment4,113
- 26 Manufacture of computer, electronic and optical products460
- 27 Manufacture of electrical equipment490
- 28 Manufacture of machinery and equipment n.e.c.1,127
- 29 Manufacture of motor vehicles, trailers and semi-trailers308
- 30 Manufacture of other transport equipment132
- 31 Manufacture of furniture968
- 32 Other manufacturing959
- 33 Repair, maintenance and installation of machinery and equipment2,363
- 35 Electricity, gas, steam and air conditioning supply623
- 36 Water collection, treatment and supply41
- 37 Sewerage127
- 38 Waste collection, recovery and disposal activities664
- 39 Remediation activities and other waste management service activities112
- 41 Construction of residential and non-residential buildings12,396
- 42 Civil engineering2,400
- 43 Specialised construction activities35,300
- 46 Wholesale trade24,468
- 47 Retail trade26,227
- 49 Land transport and transport via pipelines7,321
- 50 Water transport340
- 51 Air transport173
- 52 Warehousing, storage and support activities for transportation2,362
- 53 Postal and courier activities573
- 55 Accommodation2,104
- 56 Food and beverage service activities16,017
- 58 Publishing activities769
- 59 Motion picture, video and television programme production, sound recording and music publishing activities1,457
- 60 Programming, broadcasting, news agency and other content distribution activities163
- 61 Telecommunication294
- 62 Computer programming, consultancy and related activities18,473
- 63 Computing infrastructure, data processing, hosting and other information service activities2,622
- 64 Financial service activities, except insurance and pension funding20,943
- 65 Insurance, reinsurance and pension funding, except compulsory social security152
- 66 Activities auxiliary to financial services and insurance activities5,254
- 68 Real estate activities32,648
- 69 Legal and accounting activities12,871
- 70 Activities of head offices and management consultancy35,936
- 71 Architectural and engineering activities; technical testing and analysis9,882
- 72 Scientific research and development599
- 73 Activities of advertising, market research and public relations6,897
- 74 Other professional, scientific and technical activities3,245
- 75 Veterinary activities1,234
- 77 Rental and leasing activities2,338
- 78 Employment activities1,219
- 79 Travel agency, tour operator and other reservation service and related activities644
- 80 Investigation and security activities301
- 81 Services to buildings and landscape activities5,101
- 82 Office administrative, office support and other business support activities9,438
- 84 Public administration and defence; compulsory social security98
- 85 Education2,506
- 86 Human health activities25,368
- 87 Residential care activities584
- 88 Social work activities without accommodation1,025
- 90 Arts creation and performing arts activities2,109
- 91 Libraries, archives, museums and other cultural activities129
- 92 Gambling and betting activities119
- 93 Sports activities and amusement and recreation activities2,716
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles2,943
- 96 Personal service activities4,642
Municipalities with the most companies in the sector · Flanders
Frequently asked questions
Which is the largest company in Activities of membership organisations in Flanders?
By total assets, it is Centraal Initiatief voor Steun aan de Congregaties in het Aartsbisdom (€145.4m, financial year 2025).
How many companies in Activities of membership organisations in Flanders are ranked?
457 out of 491 active companies in the sector with their registered office in the area: those whose latest accounts are less than 3 years old.
Why does this ranking differ from other lists?
It uses each company's annual accounts as filed with the National Bank, not consolidated group accounts. A holding, a subsidiary or a purchasing entity can therefore appear separately. Only companies whose latest accounts are less than 3 years old are ranked.
Analyse companies · Flanders
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Open the full file →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 14 Nov 2026.