Specialised construction activities: largest employers
16,357 Belgian companies in the sector (NACE 43) report employees in recent accounts; here are the top 20. Altrad Services leads with 1,098.5 FTE (financial year 2025).
Top 20
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 | Altrad Services 9130 Beveren-Kruibeke-Zwijndrecht | €108.4m | €172.0m | €41.2m | 1,098.5 | 2025 |
| 2 | Renotec 2440 Geel | €89.6m | €241.0m | €25.2m | 844.5 | 2025 |
| 3 | Jacops 8540 Deerlijk | €160.1m | €271.1m | €54.1m | 647.4 | 2025 |
| 4 | Imtech Belgium OU EN Francais Imtech Belgique OU EN Neerlandais Imtech Belgie 1070 Anderlecht | €99.2m | €192.3m | €37.5m | 568.2 | 2025 |
| 5 | EEG 8560 Wevelgem | €84.0m | €158.7m | €26.3m | 522.5 | 2025 |
| 6 | Unit-T Certified Services 2800 Mechelen | €16.4m | €44.8m | €5.64m | 468.0 | 2025 |
| 7 | VINCI Facilities Belgium 1000 Brussels | €61.4m | €94.6m | €10.1m | 458.4 | 2025 |
| 8 | Cegelec Industry 1130 Brussels | €27.7m | €71.4m | €5.85m | 394.3 | 2025 |
| 9 | Sarens 1861 Meise | €791.7m | €352.0m | €112.6m | 372.3 | 2025 |
| 10 | Circet Belgium 3583 Beringen | €32.7m | €60.2m | €19.9m | 365.9 | 2025 |
| 11 | Collignon ENG. 6997 Érezée | €51.8m | €87.9m | €8.28m | 355.9 | 2025 |
| 12 | Aertssen Lifting 2940 Stabroek | €51.2m | €66.7m | €9.41m | 340.1 | 2025 |
| 13 | Aertssen Infra 2940 Stabroek | €173.1m | €199.1m | €47.7m | 337.0 | 2025 |
| 14 | Electrotechnique ET Mecanique Putman Freres 1070 Anderlecht | €58.8m | €82.3m | €20.5m | 333.7 | 2025 |
| 15 | VMA SUD 6040 Charleroi | €54.9m | €90.3m | €11.1m | 330.4 | 2025 |
| 16 | Bilfinger Industrial Services Belgiê 2070 Beveren-Kruibeke-Zwijndrecht | €33.1m | €118.8m | €5.49m | 328.4 | 2025 |
| 17 | V.M.A. 9830 Sint-Martens-Latem | €83.7m | €106.8m | €24.6m | 324.0 | 2025 |
| 18 | ZP Rénovation 1050 Ixelles | 107,943 € | — | 16,642 € | 311.6 | 2025 |
| 19 | Franki Foundations Belgium 1480 Tubize | €111.4m | €78.2m | €41.1m | 306.0 | 2025 |
| 20 | Menatam 5020 Namur | €80.9m | €132.1m | €27.0m | 299.9 | 2025 |
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.
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Frequently asked questions
Who is the largest employer in Specialised construction activities?
Altrad Services, with 1,098.5 full-time equivalents reported (financial year 2025).
How many Specialised construction activities companies report employees?
16,357 out of 53,287, in accounts less than 3 years old.
Analyse companies in Specialised construction activities
Filter these companies by size, soundness and trend, follow them and get an alert when their accounts or publications change.
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 11 Nov 2026.