# Multinational companies headquartered in Wallonia
Tamtam tracks 234 multinational companies headquartered in Wallonia. This list ranks the 50 largest by number of employees on LinkedIn, led by Odoo, UniversitΓ© catholique de Louvain and John Cockerill. Their median headcount is 709. Half of them were founded in 1981 or later. The most common headquarters are Nivelles (6), Louvain-la-Neuve (5) and Charleroi (2).
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, UniversitΓ© 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.
π§πͺ Wallonia Β· 50 companies Β· Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Odoo](https://www.tamtam.ai/c/odoo) (odoo.com)
Offers integrated open-source business applications, including CRM, sales, accounting, and HR, for various businesses and industries worldwide. | Software Development | π§πͺ Louvain-la-Neuve | 8,849 | 2005 |
| 2 | [UniversitΓ© catholique de Louvain](https://www.tamtam.ai/c/universite-catholique-de-louvain) (uclouvain.be)
Provides higher education programs, conducts high-level research, and offers services to society across multiple campuses in Belgium, employing thousands of staff. | Research Services | π§πͺ Louvain-la-Neuve | 7,288 | |
| 3 | [John Cockerill](https://www.tamtam.ai/c/john-cockerill) (johncockerill.com)
Designs, integrates, modernizes, maintains equipment for energy, defense, steelmaking, environment, and industry, focusing on performance, innovation, and global reach. | Industrial Machinery Manufacturing | π§πͺ Seraing | 6,989 | 1817 |
| 4 | [Swift](https://www.tamtam.ai/c/swift) (swift.com)
Provides secure financial messaging, connecting over 11,000 organizations in 200+ countries, offering a platform, products, and services for communication and compliance. | Financial Services | π§πͺ La Hulpe | 5,640 | 1973 |
| 5 | [Lhoist](https://www.tamtam.ai/c/lhoist) (lhoist.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! | Mining | π§πͺ Limelette | 3,515 | 1889 |
| 6 | [AGC Glass Europe](https://www.tamtam.ai/c/agc-glass-europe) (agc-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 | Glass, Ceramics and Concrete Manufacturing | π§πͺ Louvain-la-Neuve | 3,153 | |
| 7 | [IBA](https://www.tamtam.ai/c/iba) (iba-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 | Medical Equipment Manufacturing | π§πͺ Louvain-la-Neuve | 3,090 | 1986 |
| 8 | [Sonaca](https://www.tamtam.ai/c/sonaca) (sonaca.com)
An aerospace entity specializing in aerostructures, services, innovation, space, and defense, offering tailored solutions, competitive pricing, and global support | Aviation and Aerospace Component Manufacturing | π§πͺ Gosselies | 2,241 | 1920 |
| 9 | [Knauf Insulation](https://www.tamtam.ai/c/knauf-insulation) (knauf.com)
Manufactures diverse insulation materials and solutions focused on enhancing energy efficiency and sustainability in residential, commercial, and industrial buildings worldwide. | Wholesale Building Materials | π§πͺ Vise | 2,183 | |
| 10 | [Croix-Rouge de Belgique](https://www.tamtam.ai/c/croix-rouge-de-belgique) (croix-rouge.be)
Provide humanitarian aid, disaster relief, health protection, solidarity actions, and international cooperation focusing on vulnerable populations and crisis prevention. | Non-profit Organizations | π§πͺ Namur | 2,130 | 1864 |
| 11 | [Carmeuse](https://www.tamtam.ai/c/carmeuse) (carmeuse.com)
Global manufacturer of lime, limestone, and mineral-based products for industrial and construction applications, as well as offering environmental benefits and equipment services | Mining | π§πͺ Louvain-la-Neuve | 2,047 | 1860 |
| 12 | [Zetes](https://www.tamtam.ai/c/zetes) (zetes.com)
Delivers SAAS solutions, optimizing customers' supply chains and innovating citizen identification globally. Work for B2B customers ensures end-to-end traceability and visibility of goods. | Software Development | π§πͺ Brussels | 1,261 | 1984 |
| 13 | [NSI](https://www.tamtam.ai/c/nsi-awans) (groupensi.com)
Providing integrated IT solutions and high-value services including enterprise architecture, ERP, AI, mobile, e-commerce, and infrastructure management for businesses. | IT Services and IT Consulting | π§πͺ Awans | 1,172 | 1993 |
| 14 | [Prayon](https://www.tamtam.ai/c/prayon) (prayon.com)
A global leader in phosphorus chemistry, manufacturing phosphate and fluorine solutions for various industries like food, water treatment, electronics, and pharmaceuticals | Chemical Manufacturing | π§πͺ Engis | 1,064 | |
| 15 | [EVS](https://www.tamtam.ai/c/evs) (evs.com)
provider of live video technology solutions for broadcast and new media, delivering real-time sports, entertainment, and news content globally | Broadcast Media Production and Distribution | π§πͺ Seraing | 1,052 | 1994 |
| 16 | [FN Herstal](https://www.tamtam.ai/c/fn-herstal) (fnherstal.com)
Design and manufacture of advanced small arms, less lethal solutions, integrated weapon systems, and comprehensive support for global defense and law enforcement. | Defense and Space Manufacturing | π§πͺ Herstal | 984 | 1889 |
| 17 | [GAMING1](https://www.tamtam.ai/c/gaming1) (gaming1.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 | Gambling Facilities and Casinos | π§πͺ LiΓ¨ge | 982 | 1992 |
| 18 | [NLMK Europe](https://www.tamtam.ai/c/nlmk-europe) (eu.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 | Mining | π§πͺ La LouviΓ¨re | 979 | 2011 |
| 19 | [Magotteaux](https://www.tamtam.ai/c/magotteaux) (magotteaux.com)
Global supplier providing process optimization products, grinding media, and castings for mining, cement, and power industries through expert advice and sustainable manufacturing. | Mining | π§πͺ Vaux-sous-ChΓ¨vremont | 966 | 1920 |
| 20 | [AGC Automotive Europe](https://www.tamtam.ai/c/agc-automotive-europe) (agc-automotive.com)
Leading European supplier of automotive glass, fixation devices, antennas, sensors, heating elements, and enhanced property glazing for vehicle manufacturers worldwide | Motor Vehicle Manufacturing | π§πͺ Louvain-la-Neuve | 934 | |
| 21 | [I-care Group](https://www.tamtam.ai/c/i-care-group) (icareweb.com)
Global leader in AI-powered predictive maintenance, offering data-driven condition monitoring solutions to reduce industrial risks and promote sustainability | Software Development | π§πͺ Mons | 862 | 2004 |
| 22 | [Thomas & Piron](https://www.tamtam.ai/c/thomas-and-piron) (thomas-piron.eu)
Construction and renovation of residential, commercial, and industrial buildings in Belgium and Luxembourg with a focus on quality and innovation. | Construction | π§πͺ Our (Paliseul) | 766 | 1976 |
| 23 | [Medi-Market Group](https://www.tamtam.ai/c/medi-market-group) (medi-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. | Retail | π§πͺ Nivelles | 749 | 2014 |
| 24 | [LAURENTY](https://www.tamtam.ai/c/laurenty) (laurenty.com)
Specializing in maintenance, cleaning, asbestos removal, paintwork, green space maintenance, and road sweeping with a large fleet of vehicles and cleaning machines | Facilities Services | π§πͺ LiΓ¨ge | 728 | 1953 |
| 25 | [Easi](https://www.tamtam.ai/c/easi-nivelles) (easi.net)
Easi, a Belgian IT company, provides software development, IT infrastructure, cloud services, and cybersecurity solutions for mid-market businesses. | IT Services and IT Consulting | π§πͺ Nivelles | 709 | 1999 |
| 26 | [Hamon Group](https://www.tamtam.ai/c/hamon-group) (energy.johncockerill.com)
The company provides air quality, cooling, and heat recovery systems for industry and power generation, focusing on efficiency and reducing carbon footprint | Industrial Machinery Manufacturing | π§πͺ Seraing | 684 | 1904 |
| 27 | [Heidelberg Materials Benelux](https://www.tamtam.ai/c/heidelberg-materials-benelux) (heidelbergmaterials-benelux.com)
Leading manufacturer of cement, aggregates, and concrete in Belgium and the Netherlands with strong focus on environmental responsibility and carbon neutrality. | Wholesale Building Materials | π§πͺ Braine-l'Alleud | 666 | 1873 |
| 28 | [AISIN Europe](https://www.tamtam.ai/c/aisin-europe) (aisin-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 | Motor Vehicle Parts Manufacturing | π§πͺ Braine-l'Alleud | 656 | 1971 |
| 29 | [ASL Airlines Belgium](https://www.tamtam.ai/c/asl-airlines-belgium) (aslairlines.be)
Provides cargo and passenger air services, ACMI contracts, aircraft maintenance, and traffic rights management based in Liege Airport. | Airlines and Aviation | π§πͺ GrΓ’ce-Hollogne | 619 | 1999 |
| 30 | [Louyet Group](https://www.tamtam.ai/c/louyet-group) (louyet.com)
A family-owned business serving customers for 60 years A trusted partner of BMW, MINI, and BMW Motorrad with multiple locations | Motor Vehicle Manufacturing | π§πͺ Charleroi | 501 | 1959 |
| 31 | [Automatic Systems](https://www.tamtam.ai/c/automatic-systems) (automatic-systems.com)
Design and manufacture of high-performance secure entrance control systems including pedestrian, vehicle, and passenger access solutions worldwide. | Mechanical Or Industrial Engineering | π§πͺ Wavre | 500 | 1969 |
| 32 | [Bardahl Sadaps](https://www.tamtam.ai/c/bardahl-sadaps) (bardahl.fr)
A global company founded in 1954, specializing in manufacturing and distributing high-performance chemical products for various markets, including automotive, industrial, and DIY | Chemical Manufacturing | π§πͺ Tournai | 453 | 1954 |
| 33 | [Eiffage Γnergie SystΓ¨mes - Belux](https://www.tamtam.ai/c/eiffage-energie-systemes-belux) (eiffageenergiesystemes.be)
Specialized in electrical, industrial, climate control, and energy systems, offering design, construction, operation, and maintenance services through three expertise poles and ten entities | Environmental Services | π§πͺ Ans | 447 | 2003 |
| 34 | [Technord](https://www.tamtam.ai/c/technord) (technord.com)
Specializing in electrical engineering and industrial information communication technology, we provide innovative solutions tailored to clients' needs with expertise and dedication Trusted globally | Automation Machinery Manufacturing | π§πͺ Tournai | 440 | 1988 |
| 35 | [Unifiedpost Group](https://www.tamtam.ai/c/unifiedpost-group) (unifiedpostgroup.com)
Unifiedpost Group offers cloud-based solutions for digital connections, enhancing operational efficiency, compliance, and cash flow optimization for businesses globally | Financial Services | π§πͺ La Hulpe | 401 | 2001 |
| 36 | [Trasis](https://www.tamtam.ai/c/trasis) (trasis.com)
Design, manufacture, and support of radiolabelled therapeutic and diagnostic synthesizers, dose preparation equipment, shielding, and customized synthetic methods. | Medical Equipment Manufacturing | π§πͺ Ans | 393 | 2004 |
| 37 | [Group-IPS](https://www.tamtam.ai/c/group-ips) (group-ips.com)
Expert project management and engineering services supporting industrial projects across multiple sectors to streamline success and improve operational efficiency worldwide. | Engineering Services | π§πͺ Nivelles | 391 | 1992 |
| 38 | [Eurogentec](https://www.tamtam.ai/c/eurogentec) (eurogentec.com)
International biotechnology supplier specializing in genomics, proteomics, and biomanufacturing with ISO certifications and FDA approval for commercial manufacturing of biologics | Biotechnology Research | π§πͺ Seraing | 372 | 1985 |
| 39 | [NICOLS](https://www.tamtam.ai/c/nicols) (nicols.eu)
Leading manufacturer of household and cleaning products in Europe, specializing in sponges, wipes, air fresheners, and toilet care products for private label and branded lines | Manufacturing | π§πͺ Nivelles | 366 | 1947 |
| 40 | [Galère](https://www.tamtam.ai/c/galere) (galere.be)
General construction firm specializing in building and civil engineering projects, actively involved in major infrastructure projects in Wallonia and Brussels, employing over 1,000 people | Construction | π§πͺ Chaudfontaine | 365 | 1949 |
| 41 | [Gantrex](https://www.tamtam.ai/c/gantrex) (gantrex.com)
Global leader in crane rail solutions, founded in 1971 in Belgium Offers high-quality products, installation, and maintenance services worldwide, serving various industries | Engineering Services | π§πͺ Nivelles | 350 | 1971 |
| 42 | [De Smet Engineers & Contractors (DSEC)](https://www.tamtam.ai/c/de-smet-engineers-and-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 | Engineering Services | π§πͺ Mont-Saint-Guibert | 348 | 1989 |
| 43 | [Aerospacelab](https://www.tamtam.ai/c/aerospacelab) (aerospacelab.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 | Defense and Space Manufacturing | π§πͺ Charleroi | 347 | 2018 |
| 44 | [WANTY](https://www.tamtam.ai/c/wanty) (wanty.eu)
Specializing in large construction projects, our family business offers services such as roadwork, building dismantling, asbestos removal, and civil engineering with a focus on quality and safety | Construction | π§πͺ PΓ©ronnes-lez-Binche | 345 | 1946 |
| 45 | [Chemviron](https://www.tamtam.ai/c/chemviron) (chemviron.eu)
An international manufacturer specializing in activated carbon products for water and air purification, offering innovative treatment systems and services globally | Environmental Services | π§πͺ Feluy | 340 | 1902 |
| 46 | [3B-the fibreglass company](https://www.tamtam.ai/c/3b-the-fibreglass-company) (3b-fibreglass.com)
Development and supply of fibreglass products and technologies for reinforcing thermoplastic and thermoset polymers with global manufacturing and R&D. | Glass, Ceramics and Concrete Manufacturing | π§πͺ Herve | 335 | 2008 |
| 47 | [Waffle Factory](https://www.tamtam.ai/c/waffle-factory) (wafflefactory.com)
Franchise network offering authentic Belgian waffles, both sweet and savory, made with fresh, quality ingredients across multiple countries. | Food and Beverage Services | π§πͺ Marquain | 323 | 1999 |
| 48 | [exphar](https://www.tamtam.ai/c/exphar) (exphar.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 | Pharmaceutical Manufacturing | π§πͺ Nivelles | 319 | 1981 |
| 49 | [Materne](https://www.tamtam.ai/c/materne) (materne.be)
A company dedicated to improving consumer well-being with quality products, using natural benefits, nutritional value, and a focus on taste | Food and Beverage Manufacturing | π§πͺ Floreffe | 308 | 1888 |
| 50 | [Paprika](https://www.tamtam.ai/c/paprika) (paprika-shopping.be)
A fashion brand offering trendy, colorful, and affordable clothing for curvy women, with over 150 stores in 5 countries | Retail Apparel and Fashion | π§πͺ Wauthier-Braine | 299 | 2003 |
## 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](https://www.tamtam.ai/l/largest-companies-wallonia) (1,106)
- [Companies with in-house R&D in Wallonia](https://www.tamtam.ai/l/r-and-d-companies-wallonia) (155)
- [Manufacturers in Wallonia](https://www.tamtam.ai/l/manufacturers-wallonia) (151)
- [Retail chains in Wallonia](https://www.tamtam.ai/l/retail-chains-wallonia) (110)
- [Family-owned companies in Wallonia](https://www.tamtam.ai/l/family-owned-companies-wallonia) (82)
- [Hardware manufacturers in Wallonia](https://www.tamtam.ai/l/hardware-companies-wallonia) (75)
- [Food and Beverage Manufacturing companies in Wallonia](https://www.tamtam.ai/l/food-and-beverage-manufacturing-companies-wallonia) (75)
- [IT Services and IT Consulting companies in Wallonia](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-wallonia) (67)
- [IT services companies in Wallonia](https://www.tamtam.ai/l/it-services-companies-wallonia) (67)
- [Critical infrastructure operators in Wallonia](https://www.tamtam.ai/l/critical-infrastructure-operators-wallonia) (65)
- [Consumer goods companies in Wallonia](https://www.tamtam.ai/l/consumer-goods-companies-wallonia) (59)
- [Software Development companies in Wallonia](https://www.tamtam.ai/l/software-development-companies-wallonia) (58)
- [Transportation, Logistics, Supply Chain and Storage companies in Wallonia](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-wallonia) (57)
- [SaaS companies in Wallonia](https://www.tamtam.ai/l/saas-companies-wallonia) (54)
- [Retail companies in Wallonia](https://www.tamtam.ai/l/retail-companies-wallonia) (52)
- [Contract manufacturers in Wallonia](https://www.tamtam.ai/l/contract-manufacturers-wallonia) (51)
- [Chemical companies in Wallonia](https://www.tamtam.ai/l/chemical-companies-wallonia) (45)
- [Pharmaceutical companies in Wallonia](https://www.tamtam.ai/l/pharmaceutical-companies-wallonia) (45)
- [Aerospace and defence companies in Wallonia](https://www.tamtam.ai/l/aerospace-and-defense-companies-wallonia) (44)
- [Education providers in Wallonia](https://www.tamtam.ai/l/education-companies-wallonia) (43)
- [Financial services firms in Wallonia](https://www.tamtam.ai/l/financial-services-firms-wallonia) (41)
- [Distributors and wholesalers in Wallonia](https://www.tamtam.ai/l/distributors-and-wholesalers-wallonia) (39)
- [Food and beverage companies in Wallonia](https://www.tamtam.ai/l/food-and-beverage-companies-wallonia) (38)
- [Public sector organisations in Wallonia](https://www.tamtam.ai/l/public-sector-organisations-wallonia) (38)
## The same list elsewhere in Belgium
- [Multinational companies in Belgium](https://www.tamtam.ai/l/multinational-companies-belgium) (1,745)
- [Multinational companies in Flanders](https://www.tamtam.ai/l/multinational-companies-flanders) (1,023)
- [Multinational companies in Brussels](https://www.tamtam.ai/l/multinational-companies-brussels) (326)
- [Multinational companies in Antwerp](https://www.tamtam.ai/l/multinational-companies-antwerp) (162)
- [Multinational companies in Ghent](https://www.tamtam.ai/l/multinational-companies-ghent) (77)
- [Multinational companies in Zaventem](https://www.tamtam.ai/l/multinational-companies-zaventem) (47)
- [Multinational companies in Leuven](https://www.tamtam.ai/l/multinational-companies-leuven) (37)
- [Multinational companies in Mechelen](https://www.tamtam.ai/l/multinational-companies-mechelen) (33)
- [Multinational companies in Kontich](https://www.tamtam.ai/l/multinational-companies-kontich) (25)
---
Source: https://www.tamtam.ai/l/multinational-companies-wallonia