The companies listed in Wallonia are primarily large multinational groups, encompassing diverse sectors from industrial manufacturing to financial services and software development. Notable examples include Odoo, a developer of integrated open-source business applications; John Cockerill, which designs and maintains industrial equipment; Swift, a global financial messaging provider; and Lhoist, a leader in lime and minerals.
A significant cluster of these companies, including Odoo, Université catholique de Louvain, AGC Glass Europe, IBA, and Carmeuse, have their headquarters in Louvain-la-Neuve. This concentration of headquarters in one city suggests a regional hub for various industries and research.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 8,849 | ||||
| 2 |
Université catholique de Louvainuclouvain.be
Provides higher education programs, conducts high-level research, and offers services to society across multiple campuses in Belgium, employing thousands of staff. |
7,288 | |||
| 3 |
John Cockerilljohncockerill.com
Designs, integrates, modernizes, maintains equipment for energy, defense, steelmaking, environment, and industry, focusing on performance, innovation, and global reach. |
6,989 | |||
| 4 | 5,640 | ||||
| 5 |
Lhoistlhoist.com
Global leader in lime, dolime, and minerals, operating in over 25 countries, with a focus on customer proximity and high-quality solutions Join our team! |
3,515 | |||
| 6 |
AGC Glass Europeagc-glass.eu
Producer and distributor of flat glass for building and automotive industries, as well as various other sectors including transport, solar power, and high-tech applications |
3,153 | |||
| 7 |
IBAiba-group.com
A global leader in particle accelerator technology, providing advanced proton therapy equipment and services, as well as solutions in industrial sterilization and radiopharmaceuticals |
3,090 | |||
| 8 |
Sonacasonaca.com
An aerospace entity specializing in aerostructures, services, innovation, space, and defense, offering tailored solutions, competitive pricing, and global support |
2,241 | |||
| 9 |
Knauf Insulationknauf.com
Manufactures diverse insulation materials and solutions focused on enhancing energy efficiency and sustainability in residential, commercial, and industrial buildings worldwide. |
2,183 | |||
| 10 |
Croix-Rouge de Belgiquecroix-rouge.be
Provide humanitarian aid, disaster relief, health protection, solidarity actions, and international cooperation focusing on vulnerable populations and crisis prevention. |
2,130 | |||
| 11 |
Carmeusecarmeuse.com
Global manufacturer of lime, limestone, and mineral-based products for industrial and construction applications, as well as offering environmental benefits and equipment services |
2,047 | |||
| 12 | 1,261 | ||||
| 13 |
NSIgroupensi.com
Providing integrated IT solutions and high-value services including enterprise architecture, ERP, AI, mobile, e-commerce, and infrastructure management for businesses. |
1,172 | |||
| 14 |
Prayonprayon.com
A global leader in phosphorus chemistry, manufacturing phosphate and fluorine solutions for various industries like food, water treatment, electronics, and pharmaceuticals |
1,064 | |||
| 15 | 1,052 | ||||
| 16 |
FN Herstalfnherstal.com
Design and manufacture of advanced small arms, less lethal solutions, integrated weapon systems, and comprehensive support for global defense and law enforcement. |
984 | |||
| 17 |
GAMING1gaming1.com
The company is a leading Belgian provider of land-based and online games of chance, aiming to become a world leader in regulated online gaming |
982 | |||
| 18 |
NLMK Europeeu.nlmk.com
NLMK Europe produces a wide range of steel products, including hot rolled, cold rolled, and coated steels, focusing on quality, sustainability, and customer satisfaction |
979 | |||
| 19 |
Magotteauxmagotteaux.com
Global supplier providing process optimization products, grinding media, and castings for mining, cement, and power industries through expert advice and sustainable manufacturing. |
966 | |||
| 20 |
AGC Automotive Europeagc-automotive.com
Leading European supplier of automotive glass, fixation devices, antennas, sensors, heating elements, and enhanced property glazing for vehicle manufacturers worldwide |
934 | |||
| 21 |
I-care Groupicareweb.com
Global leader in AI-powered predictive maintenance, offering data-driven condition monitoring solutions to reduce industrial risks and promote sustainability |
862 | |||
| 22 |
Thomas & Pironthomas-piron.eu
Construction and renovation of residential, commercial, and industrial buildings in Belgium and Luxembourg with a focus on quality and innovation. |
766 | |||
| 23 |
Medi-Market Groupmedi-market-group.be
Chain of pharmacies and parapharmacies providing personalized advice and a wide range of health, natural medicine, cosmetics, nutrition, and baby care products. |
749 | |||
| 24 |
LAURENTYlaurenty.com
Specializing in maintenance, cleaning, asbestos removal, paintwork, green space maintenance, and road sweeping with a large fleet of vehicles and cleaning machines |
728 | |||
| 25 | 709 | ||||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 |
Hamon Groupenergy.johncockerill.com
The company provides air quality, cooling, and heat recovery systems for industry and power generation, focusing on efficiency and reducing carbon footprint |
684 | |||
| 27 |
Heidelberg Materials Beneluxheidelbergmaterials-benelux.com
Leading manufacturer of cement, aggregates, and concrete in Belgium and the Netherlands with strong focus on environmental responsibility and carbon neutrality. |
666 | |||
| 28 |
AISIN Europeaisin-europe.com
Global provider of automotive technologies and products focusing on creating cleaner, safer, and more comfortable mobility, with a multicultural team dedicated to value creation |
656 | |||
| 29 |
ASL Airlines Belgiumaslairlines.be
Provides cargo and passenger air services, ACMI contracts, aircraft maintenance, and traffic rights management based in Liege Airport. |
619 | |||
| 30 |
Louyet Grouplouyet.com
A family-owned business serving customers for 60 years A trusted partner of BMW, MINI, and BMW Motorrad with multiple locations |
501 | |||
| 31 |
Automatic Systemsautomatic-systems.com
Design and manufacture of high-performance secure entrance control systems including pedestrian, vehicle, and passenger access solutions worldwide. |
500 | |||
| 32 |
Bardahl Sadapsbardahl.fr
A global company founded in 1954, specializing in manufacturing and distributing high-performance chemical products for various markets, including automotive, industrial, and DIY |
453 | |||
| 33 |
Eiffage Énergie Systèmes - Beluxeiffageenergiesystemes.be
Specialized in electrical, industrial, climate control, and energy systems, offering design, construction, operation, and maintenance services through three expertise poles and ten entities |
447 | |||
| 34 |
Technordtechnord.com
Specializing in electrical engineering and industrial information communication technology, we provide innovative solutions tailored to clients' needs with expertise and dedication Trusted globally |
440 | |||
| 35 |
Unifiedpost Groupunifiedpostgroup.com
Unifiedpost Group offers cloud-based solutions for digital connections, enhancing operational efficiency, compliance, and cash flow optimization for businesses globally |
401 | |||
| 36 |
Trasistrasis.com
Design, manufacture, and support of radiolabelled therapeutic and diagnostic synthesizers, dose preparation equipment, shielding, and customized synthetic methods. |
393 | |||
| 37 |
Group-IPSgroup-ips.com
Expert project management and engineering services supporting industrial projects across multiple sectors to streamline success and improve operational efficiency worldwide. |
391 | |||
| 38 |
Eurogenteceurogentec.com
International biotechnology supplier specializing in genomics, proteomics, and biomanufacturing with ISO certifications and FDA approval for commercial manufacturing of biologics |
372 | |||
| 39 | 366 | ||||
| 40 | 365 | ||||
| 41 |
Gantrexgantrex.com
Global leader in crane rail solutions, founded in 1971 in Belgium Offers high-quality products, installation, and maintenance services worldwide, serving various industries |
350 | |||
| 42 |
De Smet Engineers & Contractors (DSEC)dsengineers.com
Global provider of Engineering and Turn Key projects for various industries including bio-based chemicals, energy efficiency, sugars, oils, agro-nutrients, with a focus on sustainability |
348 | |||
| 43 |
Aerospacelabaerospacelab.com
Specializing in manufacturing satellites ranging from 50 kg to 1000 kg for Earth Observation, Telecommunications, and Technology Demonstrations, achieving TRL9 status in 2021 #BuildingOnHeritage |
347 | |||
| 44 | 345 | ||||
| 45 |
Chemvironchemviron.eu
An international manufacturer specializing in activated carbon products for water and air purification, offering innovative treatment systems and services globally |
340 | |||
| 46 |
3B-the fibreglass company3b-fibreglass.com
Development and supply of fibreglass products and technologies for reinforcing thermoplastic and thermoset polymers with global manufacturing and R&D. |
335 | |||
| 47 |
Waffle Factorywafflefactory.com
Franchise network offering authentic Belgian waffles, both sweet and savory, made with fresh, quality ingredients across multiple countries. |
323 | |||
| 48 |
expharexphar.com
For 40 years, this laboratory has been developing affordable pharmaceutical specialties for African, Asian, and Central American markets, with 50 products in 25 countries |
319 | |||
| 49 |
Maternematerne.be
A company dedicated to improving consumer well-being with quality products, using natural benefits, nutritional value, and a focus on taste |
308 | |||
| 50 |
Paprikapaprika-shopping.be
A fashion brand offering trendy, colorful, and affordable clothing for curvy women, with over 150 stores in 5 countries |
299 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.
More company lists in Wallonia
- The largest companies in Wallonia 1,106
- Companies with in-house R&D in Wallonia 155
- Manufacturers in Wallonia 151
- Retail chains in Wallonia 110
- Family-owned companies in Wallonia 82
- Hardware manufacturers in Wallonia 75
- Food and Beverage Manufacturing companies in Wallonia 75
- IT Services and IT Consulting companies in Wallonia 67
- IT services companies in Wallonia 67
- Critical infrastructure operators in Wallonia 65
- Consumer goods companies in Wallonia 59
- Software Development companies in Wallonia 58
- Transportation, Logistics, Supply Chain and Storage companies in Wallonia 57
- SaaS companies in Wallonia 54
- Retail companies in Wallonia 52
- Contract manufacturers in Wallonia 51
- Chemical companies in Wallonia 45
- Pharmaceutical companies in Wallonia 45
- Aerospace and defence companies in Wallonia 44
- Education providers in Wallonia 43
- Financial services firms in Wallonia 41
- Distributors and wholesalers in Wallonia 39
- Food and beverage companies in Wallonia 38
- Public sector organisations in Wallonia 38
The same list elsewhere in Belgium
- Multinational companies in Belgium 1,745
- Multinational companies in Flanders 1,023
- Multinational companies in Brussels 326
- Multinational companies in Antwerp 162
- Multinational companies in Ghent 77
- Multinational companies in Zaventem 47
- Multinational companies in Leuven 37
- Multinational companies in Mechelen 33
- Multinational companies in Kontich 25