Sewerage: the largest companies in Namur province
As of 12 Nov 2026, 10 companies in Sewerage (NACE 37) in Namur province publish total assets in recent accounts (financial years 2024 to 2025). The top 10 account for €11.2m, out of €11.2m for all of them; median total assets are 464,507 €. Wiame Net leads with €4.15m (financial year 2025).
Top 10 · Sewerage · Namur province
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 | Wiame Net 5060 Sambreville | €4.15m | — | −839,130 € | 58.7 | 2025 |
| 2 | Vidange Warzee 5363 Hamois | €3.10m | — | 136,563 € | 20.0 | 2025 |
| 3 | Zemontout 5030 Gembloux | €1.41m | — | €1.03m | — | 2025 |
| 4 | Aquacur 5380 Fernelmont | 939,291 € | — | 76,687 € | 3.3 | 2025 |
| 5 | Vidange Botton 5330 Assesse | 500,718 € | — | 386,291 € | 2.0 | 2025 |
| 6 | Vidange Eco-Pro 5150 Floreffe | 428,297 € | — | 345,802 € | 2.0 | 2025 |
| 7 | Entreprises J. Delvaux 5020 Namur | 312,644 € | — | 65,001 € | — | 2025 |
| 8 | Naturem Solutions 5380 Fernelmont | 147,685 € | — | 127,302 € | — | 2025 |
| 9 | Tremelo 5020 Namur | 111,692 € | — | −22,387 € | — | 2025 |
| 10 | Dewapa Invest 5100 Namur | 52,865 € | — | −19,254 € | — | 2024 |
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 · Namur province →
Other sectors · Namur province
- 01 Crop and animal production, hunting and related service activities516
- 02 Forestry and logging140
- 08 Other mining and quarrying23
- 10 Manufacture of food products247
- 11 Manufacture of beverages39
- 13 Manufacture of textiles13
- 14 Manufacture of wearing apparel11
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials83
- 18 Printing and reproduction of recorded media71
- 20 Manufacture of chemicals and chemical products31
- 21 Manufacture of basic pharmaceutical products and pharmaceutical preparations11
- 22 Manufacture of rubber and plastic products23
- 23 Manufacture of other non-metallic mineral products61
- 24 Manufacture of basic metals11
- 25 Manufacture of fabricated metal products, except machinery and equipment181
- 26 Manufacture of computer, electronic and optical products23
- 27 Manufacture of electrical equipment30
- 28 Manufacture of machinery and equipment n.e.c.52
- 29 Manufacture of motor vehicles, trailers and semi-trailers25
- 30 Manufacture of other transport equipment10
- 31 Manufacture of furniture34
- 32 Other manufacturing63
- 33 Repair, maintenance and installation of machinery and equipment101
- 35 Electricity, gas, steam and air conditioning supply38
- 38 Waste collection, recovery and disposal activities34
- 41 Construction of residential and non-residential buildings599
- 42 Civil engineering72
- 43 Specialised construction activities1,906
- 46 Wholesale trade1,029
- 47 Retail trade1,869
- 49 Land transport and transport via pipelines205
- 52 Warehousing, storage and support activities for transportation68
- 55 Accommodation232
- 56 Food and beverage service activities973
- 58 Publishing activities48
- 59 Motion picture, video and television programme production, sound recording and music publishing activities78
- 60 Programming, broadcasting, news agency and other content distribution activities15
- 61 Telecommunication17
- 62 Computer programming, consultancy and related activities780
- 63 Computing infrastructure, data processing, hosting and other information service activities74
- 64 Financial service activities, except insurance and pension funding431
- 65 Insurance, reinsurance and pension funding, except compulsory social security19
- 66 Activities auxiliary to financial services and insurance activities312
- 68 Real estate activities1,734
- 69 Legal and accounting activities740
- 70 Activities of head offices and management consultancy1,491
- 71 Architectural and engineering activities; technical testing and analysis545
- 72 Scientific research and development54
- 73 Activities of advertising, market research and public relations285
- 74 Other professional, scientific and technical activities188
- 75 Veterinary activities131
- 77 Rental and leasing activities114
- 78 Employment activities39
- 79 Travel agency, tour operator and other reservation service and related activities31
- 80 Investigation and security activities10
- 81 Services to buildings and landscape activities277
- 82 Office administrative, office support and other business support activities338
- 84 Public administration and defence; compulsory social security11
- 85 Education225
- 86 Human health activities2,092
- 87 Residential care activities105
- 88 Social work activities without accommodation84
- 90 Arts creation and performing arts activities100
- 91 Libraries, archives, museums and other cultural activities20
- 93 Sports activities and amusement and recreation activities153
- 94 Activities of membership organisations90
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles213
- 96 Personal service activities255
Municipalities with the most companies in the sector · Namur province
- 5020 Namur (Champion, Daussoulx, Flawinne, …)2
- 5380 Fernelmont (Bierwart, Cortil-Wodon, Forville, …)2
- 5030 Gembloux (Beuzet, Ernage, Grand-Manil, …)1
- 5060 Sambreville (Arsimont, Auvelais, Falisolle, …)1
- 5100 Namur (Dave, Jambes, Naninne, …)1
- 5150 Floreffe (Floriffoux, Franière, Soye)1
- 5330 Assesse (Maillen, Sart-Bernard)1
- 5363 Hamois (Emptinne)1
Frequently asked questions
Which is the largest company in Sewerage in Namur province?
By total assets, it is Wiame Net (€4.15m, financial year 2025).
How many companies in Sewerage in Namur province are ranked?
10 out of 10 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 · Namur province
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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.