Companies in 3001 Leuven (Heverlee)
1,652 companies that have filed annual accounts are registered in 3001 Leuven (Heverlee).
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Main sectors in Leuven (Heverlee)
Largest companies in Leuven (Heverlee)
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 | Interuniversitair Micro-Electronica Centrum Scientific research and development | €1.27bn | €804.3m | €512.1m | 2,904.3 | 2025 |
| 2 | VWR International Wholesale trade | €1.12bn | €538.9m | €952.2m | — | 2025 |
| 3 | Donaldson Europe Activities of head offices and management consultancy | €1.12bn | €320.8m | €744.9m | 503.3 | 2025 |
| 4 | Terumo Europe Other manufacturing | €979.9m | €799.2m | €590.9m | 721.3 | 2026 |
| 5 | Nelson Labs Architectural and engineering activities; technical testing and analysis | €769.0m | €41.3m | €595.3m | 202.5 | 2025 |
| 6 | Siemens Industry Software Architectural and engineering activities; technical testing and analysis | €482.8m | €353.6m | €205.5m | 486.8 | 2025 |
| 7 | Materialise Other manufacturing | €394.7m | €181.0m | €259.8m | 605.9 | 2025 |
| 8 | imec EU pilot line Real estate activities | €269.6m | — | €191.6m | — | 2025 |
| 9 | StepUp RGM Activities of head offices and management consultancy | €177.1m | €22.3m | €122.0m | 18.2 | 2025 |
| 10 | Finlab Architectural and engineering activities; technical testing and analysis | €147.8m | €1.20m | €147.4m | — | 2025 |
| 11 | JSR Micro Manufacture of chemicals and chemical products | €144.7m | €174.6m | €109.6m | 213.1 | 2026 |
| 12 | TOMRA Food (Belgium) Manufacture of machinery and equipment n.e.c. | €143.0m | €159.5m | €8.86m | 181.1 | 2025 |
| 13 | Rev-Up Financial service activities, except insurance and pension funding | €142.4m | 834,898 € | €136.8m | — | 2025 |
| 14 | Nikon Metrology Europe Wholesale trade | €141.1m | €56.4m | €104.9m | 36.5 | 2026 |
| 15 | Aquila Financial service activities, except insurance and pension funding | €116.9m | — | €111.5m | — | 2024 |
| 16 | Dufinco Services to buildings and landscape activities | €110.4m | 558,800 € | €106.9m | — | 2025 |
| 17 | GC Europe Wholesale trade | €107.3m | €209.0m | €45.8m | 134.6 | 2026 |
| 18 | IDEWE - Externe dienst voor Preventie en Bescherming op het werk Human health activities | €105.6m | €129.6m | €70.5m | 806.9 | 2025 |
| 19 | UC Leuven Education | €102.9m | €85.7m | €62.9m | 174.9 | 2025 |
| 20 | Fidimec Activities of advertising, market research and public relations | €102.0m | — | €98.2m | — | 2025 |
“—”: not published. Small companies (micro and abridged accounts) do not have to publish their revenue.
Based elsewhere, present in Leuven (Heverlee)
400 companies with their registered office in another municipality operate at least one establishment in Leuven (Heverlee) (shop, branch, depot…). The largest, by balance sheet total:
| # | Company | Total assets | Revenue | Equity | FTE | Year |
|---|---|---|---|---|---|---|
| 1 | UCB Pharma 1070 Anderlecht | €20.7bn | €4.62bn | €16.2bn | 1,960.6 | 2025 |
| 2 | Proximus 1030 Schaerbeek | €9.96bn | €3.89bn | €1.42bn | 8,312.3 | 2025 |
| 3 | Colruyt Group 1500 Halle | €8.45bn | €930.1m | €6.32bn | 4,183.3 | 2026 |
| 4 | UCB Biopharma 1070 Anderlecht | €7.15bn | €2.04bn | €1.18bn | 1,395.2 | 2025 |
| 5 | Aquafin 2630 Aartselaar | €4.48bn | €636.9m | €1.11bn | 1,207.3 | 2025 |
| 6 | bpost 1000 Brussels | €4.27bn | €2.19bn | €657.6m | 23,730.2 | 2025 |
| 7 | SD Worx Sécretariat Social ASBL 2000 Antwerp | €3.37bn | 467,379 € | €21.4m | 102.3 | 2025 |
| 8 | Colruyt Food Retail 1500 Halle | €3.05bn | €8.05bn | €786.2m | 16,584.4 | 2026 |
| 9 | Vlaamse Maatschappij voor Watervoorziening 1030 Schaerbeek | €2.25bn | €838.3m | €1.26bn | 1,594.8 | 2024 |
| 10 | Carrefour Belgium 1930 Zaventem | €1.42bn | €4.02bn | €42.5m | 6,365.9 | 2025 |
| 11 | Evara 9000 Ghent | €1.30bn | €443.2m | €750.4m | 7,600.9 | 2025 |
| 12 | SD Worx People Solutions 2000 Antwerp | €1.08bn | — | €325.2m | — | 2025 |
| 13 | KUWAIT PETROLEUM (Belgium) 2018 Antwerp | €628.7m | €2.73bn | €214.6m | 426.3 | 2025 |
| 14 | Terumo BCT Europe 1930 Zaventem | €590.3m | €369.5m | €515.9m | 271.0 | 2026 |
| 15 | EG Retail (Belgium) 2180 Antwerp | €582.1m | €860.8m | €44.1m | 1.0 | 2025 |
| 16 | Group S - Secretariat Social, Secretariat Social Agree D'Employeurs 1000 Brussels | €463.5m | €79.4m | €29.7m | 34.6 | 2025 |
| 17 | Cebeo 8790 Waregem | €368.7m | €773.0m | €244.0m | 914.0 | 2025 |
| 18 | Vlaams Instituut Voor Biotechnologie - Flanders Institute FOR Biotechnology 9052 Ghent | €323.7m | €52.6m | €172.4m | 928.4 | 2025 |
| 19 | Xerius Caisse D'Assurances Sociales 2000 Antwerp | €322.6m | €37.6m | €50.7m | 187.5 | 2025 |
| 20 | Cegeka Groep 3500 Hasselt | €307.7m | €117.6m | €59.7m | 403.0 | 2025 |
Establishments: establishment units declared in the Crossroads Bank for Enterprises (CBE). Each company’s registered office is shown under its name.
“—”: not published. Small companies (micro and abridged accounts) do not have to publish their revenue.
Nearby municipalities
Frequently asked questions
How many companies are registered in Leuven (Heverlee)?
1,652 companies that have filed annual accounts are registered at postcode 3001 (Leuven (Heverlee)).
What are the main sectors in Leuven (Heverlee)?
By number of companies: Computer programming, consultancy and related activities (208), Activities of head offices and management consultancy (195), Human health activities (149).
What is the largest company in Leuven (Heverlee)?
By total assets, it is Interuniversitair Micro-Electronica Centrum (€1.27bn, financial year 2025).
How many jobs do companies in Leuven (Heverlee) report?
Companies registered in Leuven (Heverlee) together report 17,005 full-time equivalents in their latest accounts. These jobs may be located outside the municipality.
Analyse companies in Leuven (Heverlee)
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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 25 Oct 2026.