Scientific research and development: the largest employers in Walloon Brabant
As of 12 Nov 2026, 25 companies in Scientific research and development (NACE 72) in Walloon Brabant report employees in recent accounts (financial years 2023 to 2025). The 10 largest employers account for 219.1 FTE, out of 255.4 for all of them; median headcount is 4 FTE. Parexel Belgium leads with 63.1 FTE (financial year 2025).
Top 25 · Scientific research and development · Walloon 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 | Parexel Belgium 1300 Wavre | €6.82m | €13.1m | €4.35m | 63.1 | 2025 |
| 2 | Novadip Biosciences 1435 Mont-Saint-Guibert | €85.3m | — | €50.0m | 39.3 | 2025 |
| 3 | Novalix Belgium 1420 Braine-l'Alleud | €1.64m | — | 194,823 € | 36.3 | 2025 |
| 4 | ViiV Healthcare 1300 Wavre | €17.0m | €63.3m | €6.53m | 21.8 | 2025 |
| 5 | Tools4Patient 1435 Mont-Saint-Guibert | €23.1m | — | €19.5m | 16.2 | 2025 |
| 6 | Celyad Oncology 1435 Mont-Saint-Guibert | €4.03m | 21,000 € | €2.24m | 10.5 | 2025 |
| 7 | EsoBiotec 1435 Mont-Saint-Guibert | €16.5m | — | €12.4m | 9.4 | 2025 |
| 8 | Equaly 1348 Ottignies-Louvain-la-Neuve | €1.87m | — | −221,605 € | 8.9 | 2023 |
| 9 | CARI 1348 Ottignies-Louvain-la-Neuve | 415,816 € | — | 288,598 € | 8.5 | 2025 |
| 10 | ChemoSensoryX Biosciences SA 1348 Ottignies-Louvain-la-Neuve | €1.53m | — | −441,906 € | 5.1 | 2025 |
| 11 | H2WIN 1400 Nivelles | €7.36m | — | €6.19m | 4.6 | 2025 |
| 12 | Arsalis 1473 Genappe | €1.31m | — | €1.13m | 4.1 | 2025 |
| 13 | Raphus 1332 Rixensart | 132,495 € | — | −3,410 € | 4.0 | 2025 |
| 14 | European Future Innovation System Centre 1348 Ottignies-Louvain-la-Neuve | €1.42m | €1.26m | 284,426 € | 3.6 | 2025 |
| 15 | BiocSol 1435 Mont-Saint-Guibert | €5.75m | — | €4.35m | 3.1 | 2025 |
| 16 | Incize 1348 Ottignies-Louvain-la-Neuve | €2.76m | — | 877,146 € | 3.0 | 2025 |
| 17 | The Akkermansia Company 1435 Mont-Saint-Guibert | €16.9m | — | −€3.44m | 3.0 | 2025 |
| 18 | WEL Research Institute 1300 Wavre | €3.61m | — | €3.13m | 3.0 | 2025 |
| 19 | Energy Green Concept 1410 Waterloo | 199,918 € | — | 28,245 € | 2.9 | 2024 |
| 20 | Ansers 1360 Perwez | 625,309 € | — | 411,722 € | 2.3 | 2025 |
| 21 | HepaVue Dx 1410 Waterloo | €3.71m | — | 429,994 € | 1.0 | 2025 |
| 22 | Ecsor 1450 Chastre | 456,113 € | — | 119,960 € | 0.8 | 2025 |
| 23 | Rommel Consulting Partners 1370 Jodoigne | 670,764 € | — | 46,182 € | 0.5 | 2025 |
| 24 | ADBDL Médecine et Sciences médicales 1300 Wavre | 85,668 € | 201,892 € | 63,510 € | 0.3 | 2025 |
| 25 | Crescendo 3 1348 Ottignies-Louvain-la-Neuve | 501,331 € | — | 269,844 € | 0.1 | 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.
Scientific research and development across Belgium → All sectors · Walloon Brabant →
Other sectors · Walloon Brabant
- 01 Crop and animal production, hunting and related service activities125
- 02 Forestry and logging19
- 10 Manufacture of food products109
- 11 Manufacture of beverages13
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials21
- 18 Printing and reproduction of recorded media46
- 20 Manufacture of chemicals and chemical products23
- 21 Manufacture of basic pharmaceutical products and pharmaceutical preparations18
- 22 Manufacture of rubber and plastic products16
- 23 Manufacture of other non-metallic mineral products29
- 24 Manufacture of basic metals10
- 25 Manufacture of fabricated metal products, except machinery and equipment74
- 26 Manufacture of computer, electronic and optical products32
- 27 Manufacture of electrical equipment18
- 28 Manufacture of machinery and equipment n.e.c.36
- 29 Manufacture of motor vehicles, trailers and semi-trailers11
- 31 Manufacture of furniture32
- 32 Other manufacturing37
- 33 Repair, maintenance and installation of machinery and equipment32
- 38 Waste collection, recovery and disposal activities11
- 41 Construction of residential and non-residential buildings155
- 42 Civil engineering28
- 43 Specialised construction activities562
- 46 Wholesale trade589
- 47 Retail trade903
- 49 Land transport and transport via pipelines125
- 52 Warehousing, storage and support activities for transportation22
- 55 Accommodation34
- 56 Food and beverage service activities513
- 58 Publishing activities44
- 59 Motion picture, video and television programme production, sound recording and music publishing activities34
- 61 Telecommunication13
- 62 Computer programming, consultancy and related activities328
- 63 Computing infrastructure, data processing, hosting and other information service activities17
- 64 Financial service activities, except insurance and pension funding76
- 66 Activities auxiliary to financial services and insurance activities117
- 68 Real estate activities236
- 69 Legal and accounting activities248
- 70 Activities of head offices and management consultancy324
- 71 Architectural and engineering activities; technical testing and analysis145
- 73 Activities of advertising, market research and public relations89
- 74 Other professional, scientific and technical activities31
- 75 Veterinary activities26
- 77 Rental and leasing activities22
- 78 Employment activities28
- 79 Travel agency, tour operator and other reservation service and related activities14
- 81 Services to buildings and landscape activities144
- 82 Office administrative, office support and other business support activities57
- 85 Education78
- 86 Human health activities242
- 87 Residential care activities59
- 88 Social work activities without accommodation60
- 90 Arts creation and performing arts activities28
- 93 Sports activities and amusement and recreation activities91
- 94 Activities of membership organisations30
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles66
- 96 Personal service activities126
Municipalities with the most companies in the sector · Walloon Brabant
- 1410 Waterloo16
- 1300 Wavre (Limal)11
- 1348 Ottignies-Louvain-la-Neuve (Louvain-La-Neuve)9
- 1435 Mont-Saint-Guibert (Corbais, Hévillers)8
- 1380 Lasne (Couture-Saint-Germain, Lasne-Chapelle-Saint-Lambert, Maransart, …)7
- 1370 Jodoigne (Dongelberg, Jauchelette, Jodoigne-Souveraine, …)5
- 1400 Nivelles (Monstreux)5
- 1450 Chastre (Chastre-Villeroux-Blanmont, Cortil-Noirmont, Gentinnes, …)4
- 1330 Rixensart3
- 1402 Nivelles (Thines)3
- 1495 Villers-la-Ville (Marbais, Mellery, Sart-Dames-Avelines, …)3
- 1310 La Hulpe2
Frequently asked questions
Which is the largest employer in Scientific research and development in Walloon Brabant?
Among companies, Parexel Belgium, with 63.1 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. 25 out of 105 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 · Walloon 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.