Architectural and engineering activities; technical testing and analysis
15,889 Belgian companies whose main activity falls under NACE code 71 have filed annual accounts. Their median solvency is 52.7% for financial year 2025.
Sector medians
Computed by IdonisDistribution across the sector's companies for financial year 2025: a quarter of companies sit below the 1st quartile, half below the median, three quarters below the 3rd quartile.
| Indicator | 1st quartile | Median | 3rd quartile | Companies |
|---|---|---|---|---|
| Solvency | 24.5% | 52.7% | 75.9% | 14,474 |
| Current ratio | 1.03 | 1.85 | 3.71 | 14,417 |
| ROE | 4.9% | 21.5% | 52.4% | 13,282 |
| Equity | 23,566 € | 77,389 € | 218,089 € | 14,627 |
| Total assets | 74,288 € | 172,332 € | 464,952 € | 14,519 |
| Net result | 1,606 € | 18,230 € | 51,894 € | 14,611 |
| Headcount (avg FTE) | 0.9 | 2.0 | 6.3 | 2,927 |
Medians computed by Idonis from annual accounts filed with the National Bank, all sizes combined. The same panel is the sector benchmark on every company page. Method
Largest companies: Architectural and engineering activities; technical testing and analysis
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 | Deme Offshore Holding 2070 Beveren-Kruibeke-Zwijndrecht | €1.07bn | €2.51m | €949.1m | — | 2025 |
| 2 | Nelson Labs 3001 Leuven | €769.0m | €41.3m | €595.3m | 202.5 | 2025 |
| 3 | Intercommunale pour la Gestion et la Réalisation d'Etudes Techniques et Economiques 6000 Charleroi | €692.3m | €105.7m | €127.2m | 387.6 | 2025 |
| 4 | CMB.TECH Enterprises 2000 Antwerp | €682.6m | €2.01m | €640.8m | 14.8 | 2024 |
| 5 | Sterigenics 3018 Leuven | €594.8m | — | €469.5m | 38.1 | 2025 |
| 6 | Tramardent 4020 Liège | €502.8m | €353.2m | €2.18m | — | 2025 |
| 7 | Societe Wallonne DES Aeroports 5020 Namur | €491.7m | €38.6m | €366.9m | 67.8 | 2025 |
| 8 | Siemens Industry Software 3001 Leuven | €482.8m | €353.6m | €205.5m | 486.8 | 2025 |
| 9 | Aukera 1000 Brussels | €457.1m | 271,987 € | €456.2m | — | 2025 |
| 10 | DEME Infra 2070 Beveren-Kruibeke-Zwijndrecht | €402.5m | €295.5m | €6.53m | 78.6 | 2025 |
| 11 | Tractebel Engineering 1000 Brussels | €350.5m | €332.1m | €176.4m | 1,326.4 | 2025 |
| 12 | Myrrha 1000 Brussels | €316.4m | — | €301.1m | 2.0 | 2025 |
| 13 | Sweco 1000 Brussels | €286.7m | €315.2m | €73.8m | 1,951.9 | 2025 |
| 14 | AgomAb Therapeutics 2600 Antwerp | €251.3m | — | €244.1m | 52.0 | 2025 |
| 15 | West-Vlaamse Intercommunale 8200 Bruges | €241.0m | €34.2m | €133.5m | 103.6 | 2025 |
| 16 | Vyncke 8530 Harelbeke | €205.6m | €152.6m | €15.3m | 170.2 | 2025 |
| 17 | Desmet Belgium 1831 Machelen (Brab.) | €183.5m | €126.8m | €53.5m | 129.0 | 2024 |
| 18 | SGS Belgium 2030 Antwerp | €159.0m | €243.6m | €41.2m | 1,394.7 | 2025 |
| 19 | RELY 1210 Saint-Josse-ten-Noode | €154.9m | €8.89m | €82.7m | 18.3 | 2025 |
| 20 | Finlab 3001 Leuven | €147.8m | €1.20m | €147.4m | — | 2025 |
“—”: not published. Small companies (micro and abridged accounts) do not have to publish their revenue.
Where are they based?
Municipalities with the most
Sub-sectors
Frequently asked questions
How many Architectural and engineering activities; technical testing and analysis companies are there in Belgium?
15,889 Belgian companies whose main activity falls under NACE code 71 (Architectural and engineering activities; technical testing and analysis) have filed annual accounts with the National Bank.
What is the median solvency in Architectural and engineering activities; technical testing and analysis?
For financial year 2025, median solvency (equity over total assets) is 52.7%. The middle half of companies lies between 24.5% and 75.9% (14,474 companies).
What is the largest company in Architectural and engineering activities; technical testing and analysis?
By total assets, it is Deme Offshore Holding (€1.07bn, financial year 2025).
Where are Architectural and engineering activities; technical testing and analysis companies based?
The municipalities with the most: Ghent (359), Ixelles (277), Uccle (255).
Analyse companies in Architectural and engineering activities; technical testing and analysis
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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 10 Oct 2026.