These Brussels-based companies represent a mix of sectors, with a notable presence in hospitality, chemical manufacturing, and professional services. The list includes large international groups such as Radisson Hotel Group, which operates over 1,600 hotels, and Solvay, a chemical manufacturer founded in 1863. Other significant entities are BDO, a global professional services firm, and UCB, a biopharmaceutical company.
A clear pattern among these companies is their multinational reach, with many operating across EMEA, APAC, or globally. The presence of organizations like the European Commission and NATO also highlights Brussels' role as a center for international governance and affairs, alongside established Belgian corporations like KBC Bank & Verzekering.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Radisson Hotel Groupradissonhotels.com
Operates and develops over 1,600 hotels across EMEA and APAC, offering diverse brands, loyalty programs, carbon-neutral meetings, and sustainable stays. |
100,000 | |||
| 2 |
BDObdo.global
Providing professional services globally with 1800 offices, focusing on quality, technology, and innovative solutions for long-term client value. |
51,974 | |||
| 3 |
European Commissioneuropa.eu
An independent body representing the EU, the Commission prepares legislation, administers budgets, and cooperates with member countries on policy programs |
34,000 | |||
| 4 |
Radisson Bluradissonhotels.com
Offers stylish and elegant hotel accommodations for business and leisure travelers in various global destinations, part of a larger hotel group. |
17,691 | |||
| 5 |
Solvaysolvay.com
Develops essential chemical solutions including soda ash and peroxides for cleaner mobility, healthier living, and sustainable infrastructure across global industrial sectors. |
16,499 | |||
| 6 | 14,875 | ||||
| 7 |
KBC Bank & Verzekeringkbc.be
A leading integrated bank-insurer focused on individuals, private banking clients, and small to medium-sized enterprises in Belgium, Central and Eastern Europe Operating worldwide selectively |
13,565 | |||
| 8 |
Proximus Groupproximus.com
Provider of connectivity and digital services in Benelux and global markets, investing in networks, digital ecosystems, and innovative communication solutions. |
13,297 | |||
| 9 |
European Parliamenteuropa.eu
The company is the elected body of the European Union, consisting of members who shape laws and policies, encouraging respectful discussion and participation in European elections |
10,920 | |||
| 10 | 9,028 | ||||
| 11 |
Aliaxisaliaxis.com
Global leader in advanced piping systems for various applications, offering sustainable solutions for water and energy needs globally through innovation and operational excellence |
7,776 | |||
| 12 |
Akka Technologiesakkodis.com
European leader in engineering consulting and R&D services, supporting clients with digital solutions and expertise across various sectors throughout product life cycles. |
7,700 | |||
| 13 |
TRACTEBELtractebel-engie.com
Provides integrated solutions for sustainable energy and built environment projects, offering expertise in nuclear, renewables, power, grids, infrastructure, and water resources. |
7,185 | |||
| 14 | 6,782 | ||||
| 15 |
Umicoreumicore.com
Innovating materials technology for sustainable value, reducing emissions, advancing car technology, and driving towards a circular economy for a better life |
6,685 | |||
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. | |||||
| 16 |
Radissonradissonhotels.com
Offers hotel stays in urban, suburban, and leisure spots across the Americas, Asia Pacific, and the Caribbean under various brands. |
6,336 | |||
| 17 |
Syensqosyensqo.com
A leading science company revolutionizing technology to create sustainable, high-performance solutions for various industries worldwide with a global team of experts |
6,082 | |||
| 18 |
Eurocleareuroclear.com
A global provider of settlement and related services for bond, equity, ETFs, and mutual fund transactions, with a diverse and inclusive culture |
5,937 | |||
| 19 |
Vrije Universiteit Brusselvub.be
High-quality research, customised education, and strong social commitment focused on addressing future challenges with critical thinking and humanism. |
5,504 | |||
| 20 |
bpostgroupbpostgroup.com
The company focuses on creating connections through personalized services, constant improvement, challenging projects, collaborations, latest technologies, job opportunities, and training programs |
5,309 | |||
| 21 |
Equans BeLuxequans.be
The company focuses on solving challenges by creating smarter cities, efficient industries, and sustainable buildings through a range of expertise and services |
4,917 | |||
| 22 |
ING Belgiuming.com
Global financial institution driving sustainable progress through innovation, technology, and customer-centric banking, with diverse teams shaping the future |
4,728 | |||
| 23 |
TPFtpfgroup.com
Global multidisciplinary engineering consultancy providing end-to-end project execution across fifty countries using local know-how and international expertise for diverse infrastructure and development sectors. |
4,569 | |||
| 24 |
Country Inn & Suites by Radissonradissonhotels.com
A leading upper midscale hotel brand with locations in the United States, Canada, India, and Latin America providing a welcoming stay for travelers |
3,644 | |||
| 25 |
ENGIE Belgiumengie.be
Belgian market leader in electricity, natural gas, and energy services, offering innovative solutions for more economical, low-carbon energy use |
3,272 | |||
| 26 |
Toyota Motor Europetoyota-europe.com
A leading Japanese car manufacturer in Europe, with 30 National Marketing and Sales Companies, 3,000 sales outlets, and nine manufacturing plants |
3,196 | |||
| 27 |
Park Inn by Radissonradissonhotels.com
Offers comfortable, connected, affordable hotels, delivering stress-free experiences, good food, and vibrant environments with contemporary design and friendly personalized service. |
3,003 | |||
| 28 |
Elia Groupelia.be
Operation of extensive high-voltage electricity transmission networks in Belgium and Germany, ensuring balanced supply and supporting energy transition. |
2,759 | |||
| 29 |
European External Action Serviceeuropa.eu
The company supports the EU's foreign affairs chief in implementing the Union's Common Foreign and Security Policy as the diplomatic service |
2,697 | |||
| 30 |
Médecins Sans Frontières Belgiummsf-azg.be
Delivering medical and humanitarian aid globally for 40 years, with a team of 22,000 employees from diverse backgrounds Operations in 60+ countries |
2,654 | |||
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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 Brussels
- The largest companies in Brussels 1,033
- Financial services firms in Brussels 96
- Public sector organisations in Brussels 79
- IT Services and IT Consulting companies in Brussels 75
- Retail chains in Brussels 71
- Critical infrastructure operators in Brussels 70
- Professional services firms in Brussels 64
- IT services companies in Brussels 63
- Companies with in-house R&D in Brussels 60
- Financial Services companies in Brussels 54
- SaaS companies in Brussels 54
- Consulting firms in Brussels 52
- Government Administration companies in Brussels 52
- Insurance companies in Brussels 49
- Software Development companies in Brussels 47
- Companies with a mobile app in Brussels 42
- Education providers in Brussels 38
- Non-profit Organizations companies in Brussels 38
- Subscription businesses in Brussels 38
- Advertising Services companies in Brussels 34
- Marketing and communications agencies in Brussels 33
- Hotel and hospitality groups in Brussels 31
- Manufacturers in Brussels 30
- Recruitment and staffing agencies in Brussels 29
The same list elsewhere in Belgium
- Multinational companies in Belgium 1,745
- Multinational companies in Flanders 1,023
- Multinational companies in Wallonia 234
- 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