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Top 30 companies with in-house R&D in Brussels

Tamtam tracks 60 companies with in-house R&D headquartered in Brussels. This list ranks the 30 largest by number of employees on LinkedIn, led by Solvay, UCB and Proximus Group. Their median headcount is 1,800. Half of them were founded in 1984 or later.

馃嚙馃嚜 Brussels30 companiesUpdated Nov 11, 2026

These Brussels-based companies are engaged in in-house research and development, predominantly in industrial sectors. The list features a mix of large established corporations and mid-sized firms, with a strong presence in chemical manufacturing and IT services. Companies like Solvay develop essential chemical solutions, while UCB focuses on biopharmaceutical innovation. Proximus Group provides telecommunications and digital services, and Akka Technologies offers engineering consulting and R&D.

A notable pattern among these companies is their diverse industrial focus within the R&D landscape. While chemical manufacturing is prominent with companies such as Umicore and Syensqo, other sectors like telecommunications (Proximus Group), motor vehicle manufacturing (Toyota Motor Europe), and healthcare (UZ Brussel) also contribute significantly to the R&D activities in the region.

#CompanyIndustryHeadquarters EmployeesFounded
1
Solvaysolvay.com

Develops essential chemical solutions including soda ash and peroxides for cleaner mobility, healthier living, and sustainable infrastructure across global industrial sectors.

Chemical Manufacturing 馃嚙馃嚜 Brussels 16,499 1863
2
UCBucb.com

Innovative global biopharmaceutical company focused on transforming the lives of patients with severe diseases through cutting-edge scientific research and patient-centric approach

Pharmaceutical Manufacturing 馃嚙馃嚜 Brussels 14,875 1928
3
Proximus Groupproximus.com

Provider of connectivity and digital services in Benelux and global markets, investing in networks, digital ecosystems, and innovative communication solutions.

Telecommunications 馃嚙馃嚜 Brussels 13,297 n/a
4
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

Wholesale Building Materials 馃嚙馃嚜 Brussels 7,776 n/a
5
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.

IT Services and IT Consulting 馃嚙馃嚜 Brussels 7,700 1984
6
Umicoreumicore.com

Innovating materials technology for sustainable value, reducing emissions, advancing car technology, and driving towards a circular economy for a better life

Chemical Manufacturing 馃嚙馃嚜 Brussels 6,685 1805
7
Syensqosyensqo.com

A leading science company revolutionizing technology to create sustainable, high-performance solutions for various industries worldwide with a global team of experts

Chemical Manufacturing 馃嚙馃嚜 Brussels 6,082 2023
8
Vrije Universiteit Brusselvub.be

High-quality research, customised education, and strong social commitment focused on addressing future challenges with critical thinking and humanism.

Research Services 馃嚙馃嚜 Brussels 5,504 1969
9
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

Motor Vehicle Manufacturing 馃嚙馃嚜 Brussels 3,196 1990
10
Elia Groupelia.be

Operation of extensive high-voltage electricity transmission networks in Belgium and Germany, ensuring balanced supply and supporting energy transition.

Utilities 馃嚙馃嚜 Brussels 2,759 2001
11
UZ Brusseluzbrussel.be

Quality healthcare in a Dutch-speaking university hospital, providing care for all regardless of language or beliefs, while respecting individual autonomy

Hospitals and Health Care 馃嚙馃嚜 Brussels 2,704 1977
12
EUROCONTROLeurocontrol.int

The company supports European aviation by delivering technical excellence and expertise in air traffic management, addressing industry challenges and promoting future evolution

Airlines and Aviation 馃嚙馃嚜 Brussels 2,639 1960
13
NATO Communications and Information Agency (NCIA)nato.int

NATO's technology and cyber experts with a team of 3,000 members across Europe and North America, safeguarding networks and providing critical capabilities to preserve peace and security

IT Services and IT Consulting 馃嚙馃嚜 Brussels 2,545 2012
14
Cliniques universitaires Saint-Lucsaintluc.be

Leading academic hospital in Brussels, offering specialized care, research, and education to patients from Belgium and beyond, with a focus on patient-centered values and collaboration

Hospitals and Health Care 馃嚙馃嚜 Brussels 1,889 1976
15
Tessenderlo Grouptessenderlo.com

Global industrial group specializing in agriculture, bio-residual valorization, machinery, mechanical engineering, electronics, energy, and water-focused industrial solutions.

Chemical Manufacturing 馃嚙馃嚜 Brussels 1,800 1919

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16
Schr茅derschreder.com

Leading provider of smart outdoor lighting solutions worldwide, specializing in innovative, sustainable infrastructure for Smart Cities through energy-efficient LED technology and control systems

Appliances, Electrical, and Electronics Manufacturing 馃嚙馃嚜 Brussels 1,002 1907
17
Recticelrecticel.com

Innovative insulation solutions for buildings and acoustic needs, contributing to a carbon-free economy and better quality of life

Wholesale Building Materials 馃嚙馃嚜 Brussels 879 n/a
18
Zetes Goods IDzetes.com

A technology company specializing in supply chain optimization and citizen identification solutions, providing agility, visibility, and secure authentication across EMEA

Software Development 馃嚙馃嚜 Brussels 749 1984
19
SABCAsabca.be

A leading aerospace company in Belgium with 90+ years of experience designing, building and upgrading aircraft and space launchers for global customers

Aviation and Aerospace Component Manufacturing 馃嚙馃嚜 Brussels 714 1920
20
BSBvermeg.com

Provider of software solutions for various financial sectors including insurance, securities, wealth management, and institutional portfolio management, with offices across Europe

IT Services and IT Consulting 馃嚙馃嚜 Brussels 687 n/a
21
Fine Biscuits Company (FBC) Group

European premium biscuit group with iconic brands like Delacre and Kjeldsens, known for butter cookies and chocolate-coated biscuits Emphasis on innovation and quality

Food and Beverage Manufacturing 馃嚙馃嚜 Brussels 597 n/a
22
EDF EU Affairsedf.fr

A leading electricity company in Europe, focused on sustainable energy, innovation, and environmental responsibility while actively participating in EU policy dialogue

Electric Power Generation 馃嚙馃嚜 Brussels 521 1946
23
efficy CRMefficy.com

Provides all-in-one CRM and marketing software for sales, contact, campaign, and after-sales management, plus collaborative project and document management, with data analysis.

Software Development 馃嚙馃嚜 Brussels 450 2005
24
Royal Military Academy, Belgiumrma.ac.be

Provides academic, military, and physical training for future officers, conducts advanced training and university-level research for Defence needs.

Higher Education 馃嚙馃嚜 Brussels 333 n/a
25
3E3e.eu

A leading technology and SaaS company specializing in maximizing renewable energy asset performance with digital solutions, expert services, and innovative AI-based solutions

Software Development 馃嚙馃嚜 Brussels 271 1999
26
addactisaddactis.com

Providing innovative software solutions and analytics to support insurers in managing risk across Life, Health, and P&C insurance sectors worldwide.

Insurance 馃嚙馃嚜 Brussels 246 1993
27
Cowboycowboy.com

Design and manufacture connected electric bikes for urban riders, enhancing mobility with award-winning, innovative, and mindful transportation solutions across multiple countries.

Computers and Electronics Manufacturing 馃嚙馃嚜 Brussels 246 2017
28
Colas Belgiumcolas.be

Specializing in road and highway construction, tram tracks, container terminals, airports, and sports complexes, offering high-quality materials and competitive services Strengthening human capital through dynamic talent development policies

Construction 馃嚙馃嚜 Brussels 246 1998
29
Sirris | Innovation forwardsirris.be

Provides hands-on technological support, industrial research, and development services for Belgian companies across advanced manufacturing, digital transformation, green transition, and innovation management.

Business Consulting and Services 馃嚙馃嚜 Brussels 227 1949
30
Keyrockkeyrock.com

Global investment firm providing market making, over-the-counter trading, asset management, and options solutions for various digital assets across international cryptocurrency markets.

Financial Services 馃嚙馃嚜 Brussels 225 2017

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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 same list elsewhere in Belgium