Architectural and engineering activities; technical testing and analysis: highest revenue in Flemish Brabant
As of 12 Nov 2026, 71 companies in Architectural and engineering activities; technical testing and analysis (NACE 71) in Flemish Brabant publish their revenue in recent accounts (financial years 2024 to 2026). The top 10 account for €1.15bn, out of €1.65bn for all of them; median revenue is €4.11m. Siemens Industry Software leads with €353.6m (financial year 2025).
Top 50 · Architectural and engineering activities; technical testing and analysis · Flemish Brabant
Ranked by revenue published in the latest filed accounts (accounts less than 3 years old).
| # | Company | Total assets | Revenue | Equity | FTE | Year |
|---|---|---|---|---|---|---|
| 1 | Siemens Industry Software 3001 Leuven | €482.8m | €353.6m | €205.5m | 486.8 | 2025 |
| 2 | Vincotte 1800 Vilvoorde | €55.6m | €136.1m | €21.7m | 973.0 | 2025 |
| 3 | Desmet Belgium 1831 Machelen (Brab.) | €183.5m | €126.8m | €53.5m | 129.0 | 2024 |
| 4 | Laboratoire belge de l'Industrie Electrique 1630 Linkebeek | €80.2m | €106.1m | €21.8m | 393.5 | 2025 |
| 5 | Akkodis Belgium 1702 Dilbeek | €22.8m | €99.0m | €2.55m | 676.6 | 2025 |
| 6 | Etex Services 1880 Kapelle-op-den-Bos | €61.2m | €93.1m | €30.8m | 209.7 | 2025 |
| 7 | Vinçotte 1800 Vilvoorde | €39.3m | €76.2m | €25.1m | 317.4 | 2025 |
| 8 | Septentrio 3001 Leuven | €89.9m | €74.9m | €76.7m | 120.8 | 2025 |
| 9 | Programme Europeen pour l'Evaluation d'Automobiles Neuves - European New Car Assessment Programme 3000 Leuven | €13.4m | €43.9m | €4.17m | 9.6 | 2025 |
| 10 | Nelson Labs 3001 Leuven | €769.0m | €41.3m | €595.3m | 202.5 | 2025 |
| 11 | ACEG 1853 Grimbergen | €15.7m | €38.5m | €1.37m | 18.0 | 2025 |
| 12 | Camco Technologies 3001 Leuven | €40.2m | €37.4m | €5.84m | 170.4 | 2025 |
| 13 | Icos Vision Systems 3001 Leuven | €47.5m | €36.6m | €36.3m | 130.0 | 2025 |
| 14 | ASM Belgium 3001 Leuven | €43.8m | €33.5m | €32.9m | 92.3 | 2025 |
| 15 | Aecom Belgium 3000 Leuven | €11.1m | €30.6m | €3.47m | 53.8 | 2025 |
| 16 | Exosens Imaging Belgium 3001 Leuven | €39.1m | €29.7m | €5.69m | 67.7 | 2025 |
| 17 | Algemene Certificaten voor Elektriciteit & Gas 1853 Grimbergen | €9.47m | €26.7m | €1.12m | 198.3 | 2025 |
| 18 | ICsense 3001 Leuven | €20.1m | €25.7m | €13.1m | 104.0 | 2026 |
| 19 | NXP Semiconductors Belgium 3001 Leuven | €15.8m | €25.7m | €4.37m | 112.2 | 2025 |
| 20 | Space Applications Services 1932 Zaventem | €36.8m | €22.2m | €12.5m | 91.3 | 2025 |
| 21 | Veolia Water Technologies Belgium 3300 Tienen | €32.2m | €19.9m | €1.77m | 23.9 | 2024 |
| 22 | Tauw Belgique 3018 Leuven | €13.6m | €17.1m | €3.07m | 108.9 | 2025 |
| 23 | Randstad HR Solutions 1853 Grimbergen | €25.9m | €17.1m | €16.5m | — | 2025 |
| 24 | Belgian Construction Certification Association 1831 Machelen (Brab.) | €5.28m | €15.3m | 471,702 € | — | 2025 |
| 25 | TÜV Austria Belgium 3110 Rotselaar | €10.8m | €15.2m | €5.83m | 75.4 | 2025 |
| 26 | Architeam, Multiprofessionele Architectenvennootschap 3190 Boortmeerbeek | €8.46m | €14.4m | €1.27m | 15.9 | 2025 |
| 27 | Bodemkundige Dienst van Belgie - Service Pedologique de Belgique 3001 Leuven | €17.8m | €12.5m | €14.9m | 132.6 | 2025 |
| 28 | Centrum voor Technische Automobielinspectie 3001 Leuven | €14.3m | €12.1m | €9.56m | 80.5 | 2025 |
| 29 | archipelago Leuven 3000 Leuven | €6.35m | €10.4m | €3.11m | — | 2025 |
| 30 | COPRO - Organisme Impartial de contrôle de Produits pour la Construction 1731 Asse | €19.8m | €10.4m | €16.9m | 58.1 | 2025 |
| 31 | Solid-Property 3150 Haacht | €22.6m | €8.75m | €2.80m | 4.6 | 2025 |
| 32 | Comate 3000 Leuven | €7.44m | €7.87m | 743,133 € | 60.2 | 2025 |
| 33 | Cyient Semiconductors 3001 Leuven | €7.13m | €7.13m | −€1.53m | 23.4 | 2026 |
| 34 | Euro-Fitting Management 1930 Zaventem | €4.38m | €5.20m | €1.70m | 19.1 | 2025 |
| 35 | Rapidfit 3001 Leuven | €4.76m | €4.93m | −€10.7m | 20.3 | 2025 |
| 36 | Froyen & Zeitler 3130 Begijnendijk | €2.31m | €4.11m | 714,858 € | 3.4 | 2025 |
| 37 | Alpha Maintenance Systems 1600 Sint-Pieters-Leeuw | 683,923 € | €1.56m | 371,181 € | 5.6 | 2025 |
| 38 | Michelin Research & Development Belgium 1731 Asse | €1.47m | €1.44m | 137,500 € | 10.3 | 2025 |
| 39 | Renner Energies Belgium VX 3000 Leuven | €9.92m | €1.36m | −173,235 € | 2.9 | 2025 |
| 40 | Playful 3012 Leuven | 452,750 € | €1.23m | 272,714 € | 2.8 | 2025 |
| 41 | Certoo 1740 Ternat | 295,848 € | €1.22m | 4,822 € | 4.2 | 2025 |
| 42 | Finlab 3001 Leuven | €147.8m | €1.20m | €147.4m | — | 2025 |
| 43 | Buro Van Eyken 1980 Zemst | 864,460 € | 967,249 € | 525,191 € | 3.1 | 2025 |
| 44 | Telwave 1930 Zaventem | 255,455 € | 954,864 € | 128,883 € | 8.7 | 2025 |
| 45 | Renner Energies Belgium 3000 Leuven | €22.4m | 946,632 € | −729,889 € | 12.3 | 2025 |
| 46 | Transformation, Decoration, Techniques Speciales et Nouvelles 1630 Linkebeek | 557,940 € | 773,529 € | 199,797 € | — | 2025 |
| 47 | ID Line 1702 Dilbeek | 37,053 € | 546,381 € | 29,714 € | — | 2025 |
| 48 | ABB Robotics Belgium 1831 Machelen (Brab.) | €37.2m | 538,091 € | €13.8m | 3.3 | 2025 |
| 49 | Chris Verhaegen Architectenvennootschap 1560 Hoeilaart | 538,111 € | 278,088 € | 510,568 € | — | 2025 |
| 50 | UOP Products Belgium 1831 Machelen (Brab.) | 72,322 € | 274,797 € | −€1.28m | 1.0 | 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. These are the revenue figures published in the annual accounts. Small companies (micro and abridged accounts) do not have to publish theirs: they do not appear in this ranking.
Architectural and engineering activities; technical testing and analysis across Belgium → All sectors · Flemish Brabant →
Other sectors · Flemish Brabant
- 01 Crop and animal production, hunting and related service activities23
- 10 Manufacture of food products50
- 11 Manufacture of beverages16
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials10
- 18 Printing and reproduction of recorded media13
- 20 Manufacture of chemicals and chemical products23
- 22 Manufacture of rubber and plastic products14
- 25 Manufacture of fabricated metal products, except machinery and equipment41
- 26 Manufacture of computer, electronic and optical products20
- 27 Manufacture of electrical equipment15
- 28 Manufacture of machinery and equipment n.e.c.23
- 32 Other manufacturing16
- 33 Repair, maintenance and installation of machinery and equipment31
- 35 Electricity, gas, steam and air conditioning supply17
- 38 Waste collection, recovery and disposal activities15
- 41 Construction of residential and non-residential buildings412
- 42 Civil engineering31
- 43 Specialised construction activities482
- 46 Wholesale trade589
- 47 Retail trade404
- 49 Land transport and transport via pipelines243
- 52 Warehousing, storage and support activities for transportation60
- 53 Postal and courier activities20
- 55 Accommodation13
- 56 Food and beverage service activities164
- 58 Publishing activities12
- 59 Motion picture, video and television programme production, sound recording and music publishing activities26
- 61 Telecommunication24
- 62 Computer programming, consultancy and related activities200
- 63 Computing infrastructure, data processing, hosting and other information service activities12
- 64 Financial service activities, except insurance and pension funding130
- 66 Activities auxiliary to financial services and insurance activities29
- 68 Real estate activities152
- 69 Legal and accounting activities78
- 70 Activities of head offices and management consultancy237
- 73 Activities of advertising, market research and public relations79
- 74 Other professional, scientific and technical activities17
- 77 Rental and leasing activities43
- 78 Employment activities27
- 79 Travel agency, tour operator and other reservation service and related activities15
- 80 Investigation and security activities14
- 81 Services to buildings and landscape activities83
- 82 Office administrative, office support and other business support activities73
- 85 Education96
- 86 Human health activities99
- 87 Residential care activities65
- 88 Social work activities without accommodation54
- 90 Arts creation and performing arts activities59
- 93 Sports activities and amusement and recreation activities32
- 94 Activities of membership organisations40
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles50
- 96 Personal service activities84
Municipalities with the most companies in the sector · Flemish Brabant
- 3001 Leuven (Heverlee)81
- 3000 Leuven74
- 3010 Leuven (Kessel Lo)55
- 3020 Herent (Veltem-Beisem, Winksele)39
- 3090 Overijse39
- 3080 Tervuren (Duisburg, Vossem)36
- 3290 Diest (Deurne, Schaffen, Webbekom)36
- 1800 Vilvoorde (Peutie)34
- 1700 Dilbeek (Sint-Martens-Bodegem, Sint-Ulriks-Kapelle)33
- 1930 Zaventem (Nossegem)33
- 3140 Keerbergen31
- 1785 Merchtem (Brussegem, Hamme)29
Frequently asked questions
Which company in Architectural and engineering activities; technical testing and analysis in Flemish Brabant has the highest revenue?
Siemens Industry Software, with €353.6m of published revenue (financial year 2025).
Why are some companies missing?
Small companies (micro and abridged accounts) do not have to publish their revenue: only the 71 that publish it, out of 1,581 companies in the sector in the area, are ranked.
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 12 Nov 2026.