Specialised construction activities: the largest employers in Flemish Brabant
As of 13 Nov 2026, 1,405 companies in Specialised construction activities (NACE 43) in Flemish Brabant report employees in recent accounts (financial years 2023 to 2026). The 10 largest employers account for 1,617.2 FTE, out of 7,442.1 for all of them; median headcount is 2 FTE. Sarens leads with 372.3 FTE (financial year 2025).
Top 50 · Specialised construction activities · Flemish Brabant
Ranked by average headcount (FTE) reported in the latest filed accounts (accounts less than 3 years old).
| # | Company | Total assets | Revenue | Equity | FTE | Year |
|---|---|---|---|---|---|---|
| 1 | Sarens 1861 Meise | €791.7m | €352.0m | €112.6m | 372.3 | 2025 |
| 2 | Bumaco Koeltechniek 3110 Rotselaar | €31.8m | €95.4m | €18.5m | 269.3 | 2025 |
| 3 | CBRE GWS Belgium 1831 Machelen (Brab.) | €49.2m | €90.8m | €5.46m | 250.8 | 2025 |
| 4 | Sarens be 1861 Meise | €77.3m | €49.7m | €8.69m | 188.7 | 2025 |
| 5 | Grond- en Afbraakwerken G. en A. De Meuter 1740 Ternat | €56.0m | €101.2m | €39.3m | 167.2 | 2025 |
| 6 | Imperbel 1654 Beersel | €55.6m | €72.5m | €31.5m | 151.2 | 2025 |
| 7 | The Belgian 1861 Meise | €17.7m | €17.7m | €14.4m | 59.4 | 2025 |
| 8 | Heatco 3110 Rotselaar | €2.76m | — | €1.10m | 55.8 | 2025 |
| 9 | Watergenius 3290 Diest | €5.21m | — | €2.27m | 54.0 | 2025 |
| 10 | Easykit Group 3110 Rotselaar | €18.1m | €23.7m | €1.59m | 48.5 | 2025 |
| 11 | CE Repair Services Tervuren 3080 Tervuren | €1.08m | — | −92,036 € | 48.1 | 2025 |
| 12 | SigTraCo 1980 Zemst | €7.85m | €14.5m | €3.49m | 47.5 | 2025 |
| 13 | Union Multiservice 1830 Machelen (Brab.) | €6.05m | — | €3.71m | 45.5 | 2025 |
| 14 | Carro - Bel 1740 Ternat | €24.2m | €27.7m | €7.93m | 44.4 | 2025 |
| 15 | Technical Maintenance Service 1740 Ternat | €5.08m | €11.7m | €1.88m | 43.4 | 2025 |
| 16 | Recon International 1620 Drogenbos | €7.60m | €13.6m | €4.44m | 43.3 | 2025 |
| 17 | Thielemans & C° 1785 Merchtem | €7.35m | €15.8m | €4.34m | 41.6 | 2025 |
| 18 | Croes 3450 Geetbets | €17.9m | €29.4m | €8.64m | 41.5 | 2025 |
| 19 | D&D Isoltechnics 1601 Sint-Pieters-Leeuw | €1.81m | — | 607,596 € | 40.9 | 2025 |
| 20 | GDW Security 1831 Machelen (Brab.) | €4.55m | — | €2.03m | 39.3 | 2025 |
| 21 | Fichet Security Solutions Belgium 1930 Zaventem | €5.17m | €7.50m | −838,517 € | 37.5 | 2025 |
| 22 | Vandermeulen Bouw 3300 Tienen | €5.11m | — | €1.58m | 36.7 | 2025 |
| 23 | Koning 3020 Herent | €12.3m | €26.9m | €6.34m | 36.2 | 2025 |
| 24 | Brems Dakwerken 1800 Vilvoorde | €2.28m | — | €1.46m | 35.9 | 2025 |
| 25 | Van Haute Cooling 3090 Overijse | €3.76m | — | 933,673 € | 34.4 | 2025 |
| 26 | Bouw- en Constructiebedrijf VE-RA-BO 3200 Aarschot | €1.93m | — | 555,316 € | 34.2 | 2025 |
| 27 | Rensol 1731 Asse | €2.40m | €7.16m | €1.06m | 33.1 | 2025 |
| 28 | Van Overstraeten 1602 Sint-Pieters-Leeuw | €7.26m | — | €6.01m | 32.8 | 2025 |
| 29 | Weiss Technik Belgium 1770 Liedekerke | €12.8m | €10.2m | €4.69m | 32.8 | 2025 |
| 30 | Godts 3300 Tienen | €22.0m | €24.2m | €10.5m | 30.6 | 2025 |
| 31 | EWL 1760 Roosdaal | €3.02m | — | €1.57m | 30.4 | 2025 |
| 32 | Megavolt 1701 Dilbeek | €6.76m | — | €1.32m | 30.2 | 2025 |
| 33 | Cpaint 1930 Zaventem | €1.36m | — | 837,228 € | 29.7 | 2025 |
| 34 | HiSERV Belgium Motorized 1820 Steenokkerzeel | €25.5m | €19.6m | €13.1m | 29.2 | 2025 |
| 35 | Roelants Glas 3200 Aarschot | €2.21m | €3.36m | €1.64m | 28.8 | 2024 |
| 36 | Crabbe Dakwerken 3440 Zoutleeuw | €11.7m | €16.7m | €2.42m | 28.3 | 2025 |
| 37 | Systemair 3200 Aarschot | €8.70m | €22.8m | €4.52m | 28.2 | 2025 |
| 38 | Electrico 3110 Rotselaar | €2.09m | — | 500,000 € | 27.2 | 2025 |
| 39 | Willems Tecno 3070 Kortenberg | €1.93m | — | €1.14m | 26.7 | 2025 |
| 40 | N.D.W. 1830 Machelen (Brab.) | €4.55m | — | €1.47m | 26.5 | 2025 |
| 41 | Versah Cleaning 1851 Grimbergen | 464,265 € | — | 277,947 € | 25.5 | 2025 |
| 42 | Rollvolet 1800 Vilvoorde | €3.20m | — | €1.65m | 25.3 | 2025 |
| 43 | Trium 3200 Aarschot | €1.63m | — | −15,352 € | 24.9 | 2025 |
| 44 | Lexdries 1831 Machelen (Brab.) | €3.52m | — | €2.02m | 24.6 | 2025 |
| 45 | De Sutter 1910 Kampenhout | €19.0m | €12.4m | €6.93m | 24.2 | 2024 |
| 46 | Dieder de Loodgieter 3060 Bertem | €1.99m | — | 482,311 € | 24.2 | 2025 |
| 47 | Kitchco 3110 Rotselaar | €3.72m | €8.15m | €2.20m | 23.6 | 2025 |
| 48 | Schilderwerken Venneman 1745 Opwijk | €2.34m | — | 772,364 € | 23.3 | 2025 |
| 49 | Grondwerken Johan Millon 3020 Herent | €9.32m | €14.3m | €6.16m | 23.2 | 2025 |
| 50 | Geuvers 3001 Leuven | €2.84m | — | €1.48m | 22.4 | 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. Headcount reported by the company for all its sites: the jobs may be located elsewhere.
“—”: not published. Small companies (micro and abridged accounts) do not have to publish their revenue.
Specialised construction activities across Belgium → All sectors · Flemish Brabant →
Other sectors · Flemish Brabant
- 01 Crop and animal production, hunting and related service activities186
- 10 Manufacture of food products245
- 11 Manufacture of beverages30
- 13 Manufacture of textiles16
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials40
- 17 Manufacture of paper and paper products24
- 18 Printing and reproduction of recorded media63
- 20 Manufacture of chemicals and chemical products29
- 22 Manufacture of rubber and plastic products42
- 23 Manufacture of other non-metallic mineral products45
- 24 Manufacture of basic metals11
- 25 Manufacture of fabricated metal products, except machinery and equipment158
- 26 Manufacture of computer, electronic and optical products50
- 27 Manufacture of electrical equipment31
- 28 Manufacture of machinery and equipment n.e.c.90
- 29 Manufacture of motor vehicles, trailers and semi-trailers16
- 30 Manufacture of other transport equipment10
- 31 Manufacture of furniture59
- 32 Other manufacturing64
- 33 Repair, maintenance and installation of machinery and equipment73
- 37 Sewerage12
- 38 Waste collection, recovery and disposal activities34
- 41 Construction of residential and non-residential buildings578
- 42 Civil engineering84
- 46 Wholesale trade1,556
- 47 Retail trade1,709
- 49 Land transport and transport via pipelines531
- 51 Air transport11
- 52 Warehousing, storage and support activities for transportation112
- 53 Postal and courier activities33
- 55 Accommodation75
- 56 Food and beverage service activities1,276
- 58 Publishing activities40
- 59 Motion picture, video and television programme production, sound recording and music publishing activities62
- 61 Telecommunication32
- 62 Computer programming, consultancy and related activities590
- 63 Computing infrastructure, data processing, hosting and other information service activities37
- 64 Financial service activities, except insurance and pension funding229
- 66 Activities auxiliary to financial services and insurance activities292
- 68 Real estate activities440
- 69 Legal and accounting activities479
- 70 Activities of head offices and management consultancy543
- 71 Architectural and engineering activities; technical testing and analysis265
- 72 Scientific research and development38
- 73 Activities of advertising, market research and public relations177
- 74 Other professional, scientific and technical activities51
- 75 Veterinary activities56
- 77 Rental and leasing activities64
- 78 Employment activities49
- 79 Travel agency, tour operator and other reservation service and related activities41
- 80 Investigation and security activities22
- 81 Services to buildings and landscape activities286
- 82 Office administrative, office support and other business support activities146
- 85 Education106
- 86 Human health activities483
- 87 Residential care activities91
- 88 Social work activities without accommodation133
- 90 Arts creation and performing arts activities47
- 91 Libraries, archives, museums and other cultural activities14
- 93 Sports activities and amusement and recreation activities110
- 94 Activities of membership organisations64
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles153
- 96 Personal service activities282
Municipalities with the most companies in the sector · Flemish Brabant
- 1600 Sint-Pieters-Leeuw (Oudenaken, Sint-Laureins-Berchem)347
- 1930 Zaventem (Nossegem)250
- 1780 Wemmel229
- 1800 Vilvoorde (Peutie)202
- 1950 Kraainem178
- 1640 Sint-Genesius-Rode (Rhode-Saint-Genèse)176
- 1730 Asse (Bekkerzeel, Kobbegem, Mollem)168
- 1700 Dilbeek (Sint-Martens-Bodegem, Sint-Ulriks-Kapelle)164
- 3090 Overijse162
- 3300 Tienen (Bost, Goetsenhoven, Hakendover, …)148
- 1853 Grimbergen (Strombeek-Bever)143
- 1970 Wezembeek-Oppem130
Frequently asked questions
Which is the largest employer in Specialised construction activities in Flemish Brabant?
Among companies, Sarens, with 372.3 full-time equivalents reported (financial year 2025).
Are all the jobs located in the area?
Not necessarily: headcount is reported by the company for all its sites, and the company is ranked by the address of its registered office. 1,405 out of 6,490 companies in the sector report employees there.
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 13 Nov 2026.