Sewerage: the largest companies in Flemish Brabant
As of 12 Nov 2026, 26 companies in Sewerage (NACE 37) in Flemish Brabant publish total assets in recent accounts (financial years 2023 to 2025). The top 10 account for €420.3m, out of €422.0m for all of them; median total assets are 183,509 €. Fluvius Riobra leads with €383.3m (financial year 2025).
Top 26 · Sewerage · Flemish Brabant
Ranked by total assets in the latest filed accounts. This is a size criterion, not an assessment.
| # | Company | Total assets | Revenue | Equity | FTE | Year |
|---|---|---|---|---|---|---|
| 1 | Fluvius Riobra 3210 Lubbeek | €383.3m | €22.1m | €261.0m | — | 2025 |
| 2 | A.B. Maxi Cleaning 1930 Zaventem | €16.2m | €16.7m | €10.1m | 39.8 | 2025 |
| 3 | Longin Service 3012 Leuven | €7.87m | — | €5.27m | 43.7 | 2025 |
| 4 | Ecosoft 22 1930 Zaventem | €6.00m | — | 336,279 € | 12.4 | 2025 |
| 5 | De Wever Guido 1742 Ternat | €1.74m | — | 793,171 € | 3.8 | 2025 |
| 6 | Hydro JET 1861 Meise | €1.60m | — | €1.50m | 1.3 | 2025 |
| 7 | Braco Cleaning Service 3460 Bekkevoort | €1.30m | — | 969,458 € | 3.7 | 2025 |
| 8 | The Flow Group - Eco Solutions 3200 Aarschot | €1.25m | — | 180,279 € | 9.4 | 2025 |
| 9 | Rio Ulens 3400 Landen | 703,628 € | — | 264,380 € | 9.7 | 2025 |
| 10 | Biofiltro BE 1930 Zaventem | 374,222 € | — | 254,250 € | — | 2025 |
| 11 | Camspector 1930 Zaventem | 352,108 € | — | 176,861 € | — | 2025 |
| 12 | Van der Cruyssen F. 1730 Asse | 339,381 € | — | 233,798 € | 2.0 | 2025 |
| 13 | Rioolexpert 3110 Rotselaar | 234,588 € | — | −48,308 € | 3.5 | 2025 |
| 14 | Clement Cleaning 1761 Roosdaal | 132,430 € | — | 68,953 € | 0.5 | 2025 |
| 15 | Van IMP 1760 Roosdaal | 128,230 € | — | 5,107 € | — | 2025 |
| 16 | D.V.I. Ontstoppingsdienst 1570 Pajottegem | 107,672 € | — | 47,304 € | — | 2025 |
| 17 | J.H. 1761 Roosdaal | 78,334 € | — | 59,600 € | — | 2025 |
| 18 | De Rioloog 3360 Bierbeek | 77,081 € | — | 71,009 € | — | 2025 |
| 19 | H.J.D. Services 1950 Kraainem | 76,309 € | — | 6,645 € | — | 2025 |
| 20 | HBA Deboucheur 1700 Dilbeek | 47,388 € | 139,036 € | 30,904 € | — | 2025 |
| 21 | Wallonie Water River Clean 1640 Sint-Genesius-Rode | 31,787 € | — | 5,852 € | — | 2025 |
| 22 | DMK Concept 1970 Wezembeek-Oppem | 29,123 € | — | −52,104 € | — | 2024 |
| 23 | Services Janssens 3090 Overijse | 23,998 € | — | 17,141 € | 0.3 | 2023 |
| 24 | M&R Concept 1800 Vilvoorde | 12,397 € | — | 2,972 € | — | 2023 |
| 25 | Sani Project 1640 Sint-Genesius-Rode | 7,557 € | — | 5,803 € | — | 2025 |
| 26 | D-LI Concept 1970 Wezembeek-Oppem | 3,460 € | — | −286 € | — | 2025 |
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.
Sewerage across Belgium → All sectors · Flemish Brabant →
Other sectors · Flemish Brabant
- 01 Crop and animal production, hunting and related service activities578
- 02 Forestry and logging32
- 08 Other mining and quarrying13
- 10 Manufacture of food products445
- 11 Manufacture of beverages78
- 13 Manufacture of textiles43
- 14 Manufacture of wearing apparel33
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials120
- 17 Manufacture of paper and paper products32
- 18 Printing and reproduction of recorded media210
- 20 Manufacture of chemicals and chemical products56
- 21 Manufacture of basic pharmaceutical products and pharmaceutical preparations38
- 22 Manufacture of rubber and plastic products65
- 23 Manufacture of other non-metallic mineral products103
- 24 Manufacture of basic metals23
- 25 Manufacture of fabricated metal products, except machinery and equipment387
- 26 Manufacture of computer, electronic and optical products95
- 27 Manufacture of electrical equipment77
- 28 Manufacture of machinery and equipment n.e.c.150
- 29 Manufacture of motor vehicles, trailers and semi-trailers40
- 30 Manufacture of other transport equipment17
- 31 Manufacture of furniture116
- 32 Other manufacturing156
- 33 Repair, maintenance and installation of machinery and equipment333
- 35 Electricity, gas, steam and air conditioning supply74
- 38 Waste collection, recovery and disposal activities75
- 39 Remediation activities and other waste management service activities22
- 41 Construction of residential and non-residential buildings3,658
- 42 Civil engineering294
- 43 Specialised construction activities6,322
- 46 Wholesale trade3,994
- 47 Retail trade4,704
- 49 Land transport and transport via pipelines1,858
- 50 Water transport11
- 51 Air transport33
- 52 Warehousing, storage and support activities for transportation305
- 53 Postal and courier activities135
- 55 Accommodation230
- 56 Food and beverage service activities2,726
- 58 Publishing activities167
- 59 Motion picture, video and television programme production, sound recording and music publishing activities359
- 60 Programming, broadcasting, news agency and other content distribution activities37
- 61 Telecommunication98
- 62 Computer programming, consultancy and related activities4,615
- 63 Computing infrastructure, data processing, hosting and other information service activities522
- 64 Financial service activities, except insurance and pension funding2,304
- 65 Insurance, reinsurance and pension funding, except compulsory social security22
- 66 Activities auxiliary to financial services and insurance activities812
- 68 Real estate activities4,994
- 69 Legal and accounting activities2,572
- 70 Activities of head offices and management consultancy7,646
- 71 Architectural and engineering activities; technical testing and analysis1,570
- 72 Scientific research and development142
- 73 Activities of advertising, market research and public relations1,741
- 74 Other professional, scientific and technical activities558
- 75 Veterinary activities194
- 77 Rental and leasing activities320
- 78 Employment activities236
- 79 Travel agency, tour operator and other reservation service and related activities123
- 80 Investigation and security activities62
- 81 Services to buildings and landscape activities1,143
- 82 Office administrative, office support and other business support activities1,796
- 84 Public administration and defence; compulsory social security16
- 85 Education544
- 86 Human health activities4,952
- 87 Residential care activities104
- 88 Social work activities without accommodation191
- 90 Arts creation and performing arts activities397
- 91 Libraries, archives, museums and other cultural activities27
- 92 Gambling and betting activities22
- 93 Sports activities and amusement and recreation activities481
- 94 Activities of membership organisations117
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles524
- 96 Personal service activities1,095
Municipalities with the most companies in the sector · Flemish Brabant
- 1930 Zaventem (Nossegem)6
- 1640 Sint-Genesius-Rode (Rhode-Saint-Genèse)3
- 1761 Roosdaal (Borchtlombeek)2
- 1970 Wezembeek-Oppem2
- 1570 Pajottegem (Galmaarden, Tollembeek, Vollezele)1
- 1700 Dilbeek (Sint-Martens-Bodegem, Sint-Ulriks-Kapelle)1
- 1730 Asse (Bekkerzeel, Kobbegem, Mollem)1
- 1742 Ternat (Sint-Katherina-Lombeek)1
- 1760 Roosdaal (Onze-Lieve-Vrouw-Lombeek, Pamel, Strijtem)1
- 1800 Vilvoorde (Peutie)1
- 1861 Meise (Wolvertem)1
- 1950 Kraainem1
Frequently asked questions
Which is the largest company in Sewerage in Flemish Brabant?
By total assets, it is Fluvius Riobra (€383.3m, financial year 2025).
How many companies in Sewerage in Flemish Brabant are ranked?
26 out of 29 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 · Flemish Brabant
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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 12 Nov 2026.