Installation of insulation: largest employers
359 Belgian companies in the sector (NACE 4323) 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 | Bilfinger Industrial Services Belgiê 2070 Beveren-Kruibeke-Zwijndrecht | €33.1m | €118.8m | €5.49m | 328.4 | 2025 |
| 3 | KAEFER België 9140 Temse | €23.2m | €53.3m | €8.69m | 265.9 | 2025 |
| 4 | Les Erables 7522 Tournai | €15.8m | €4.63m | €12.0m | 180.1 | 2025 |
| 5 | EIB Insulation 2900 Schoten | €22.9m | €48.1m | €1.85m | 100.4 | 2023 |
| 6 | G + H Montage 2040 Antwerp | €8.01m | €14.1m | €3.53m | 80.2 | 2025 |
| 7 | Setip-Gcube 1083 Ganshoren | €9.76m | €20.3m | €3.37m | 58.2 | 2025 |
| 8 | Murprotec 1440 Braine-le-Château | €18.1m | €45.0m | €8.28m | 48.3 | 2025 |
| 9 | Jemisol 1400 Nivelles | €3.94m | — | €2.52m | 42.3 | 2025 |
| 10 | XLG Isotoit 4041 Herstal | €4.04m | — | €1.91m | 41.1 | 2025 |
| 11 | D&D Isoltechnics 1601 Sint-Pieters-Leeuw | €1.81m | — | 607,596 € | 40.9 | 2025 |
| 12 | Ignix 8860 Lendelede | €4.22m | — | €1.28m | 39.8 | 2025 |
| 13 | Endeco 1301 Wavre | €6.41m | — | €4.39m | 36.6 | 2025 |
| 14 | Genisol 9940 Evergem | €4.00m | €3.04m | −€1.27m | 35.3 | 2024 |
| 15 | Isolteam 8610 Kortemark | €6.21m | €14.6m | €4.76m | 33.7 | 2025 |
| 16 | Isolution 5000 Namur | €2.24m | — | 474,871 € | 33.6 | 2025 |
| 17 | Mordant Menuiserie 6040 Charleroi | €2.53m | — | 605,477 € | 33.2 | 2025 |
| 18 | KDS Consult 9120 Beveren-Kruibeke-Zwijndrecht | €2.25m | — | 417,189 € | 27.5 | 2025 |
| 19 | Isopanel 9140 Temse | €4.61m | — | €1.47m | 27.2 | 2025 |
| 20 | Gent-Asfalt 9940 Evergem | €1.54m | — | 919,527 € | 21.9 | 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 Installation of insulation?
Altrad Services, with 1,098.5 full-time equivalents reported (financial year 2025).
How many Installation of insulation companies report employees?
359 out of 1,225, in accounts less than 3 years old.
Analyse companies in Installation of insulation
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 12 Nov 2026.