# 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. 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. πŸ‡§πŸ‡ͺ Brussels Β· 30 companies Β· Updated Nov 11, 2026 | # | Company | Industry | Headquarters | Employees | Founded | |---|---|---|---|---|---| | 1 | [Solvay](https://www.tamtam.ai/c/solvay) (solvay.com)
Develops essential chemical solutions including soda ash and peroxides for cleaner mobility, healthier living, and sustainable infrastructure across global industrial sectors. | Chemical Manufacturing | πŸ‡§πŸ‡ͺ Brussels | 16,499 | 1863 | | 2 | [UCB](https://www.tamtam.ai/c/ucb) (ucb.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 | πŸ‡§πŸ‡ͺ Brussels | 14,875 | 1928 | | 3 | [Proximus Group](https://www.tamtam.ai/c/proximus-group) (proximus.com)
Provider of connectivity and digital services in Benelux and global markets, investing in networks, digital ecosystems, and innovative communication solutions. | Telecommunications | πŸ‡§πŸ‡ͺ Brussels | 13,297 | | | 4 | [Aliaxis](https://www.tamtam.ai/c/aliaxis) (aliaxis.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 | πŸ‡§πŸ‡ͺ Brussels | 7,776 | | | 5 | [Akka Technologies](https://www.tamtam.ai/c/akka-technologies) (akkodis.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 | πŸ‡§πŸ‡ͺ Brussels | 7,700 | 1984 | | 6 | [Umicore](https://www.tamtam.ai/c/umicore) (umicore.com)
Innovating materials technology for sustainable value, reducing emissions, advancing car technology, and driving towards a circular economy for a better life | Chemical Manufacturing | πŸ‡§πŸ‡ͺ Brussels | 6,685 | 1805 | | 7 | [Syensqo](https://www.tamtam.ai/c/syensqo) (syensqo.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 | πŸ‡§πŸ‡ͺ Brussels | 6,082 | 2023 | | 8 | [Vrije Universiteit Brussel](https://www.tamtam.ai/c/vrije-universiteit-brussel) (vub.be)
High-quality research, customised education, and strong social commitment focused on addressing future challenges with critical thinking and humanism. | Research Services | πŸ‡§πŸ‡ͺ Brussels | 5,504 | 1969 | | 9 | [Toyota Motor Europe](https://www.tamtam.ai/c/toyota-motor-europe) (toyota-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 | πŸ‡§πŸ‡ͺ Brussels | 3,196 | 1990 | | 10 | [Elia Group](https://www.tamtam.ai/c/elia-group) (elia.be)
Operation of extensive high-voltage electricity transmission networks in Belgium and Germany, ensuring balanced supply and supporting energy transition. | Utilities | πŸ‡§πŸ‡ͺ Brussels | 2,759 | 2001 | | 11 | [UZ Brussel](https://www.tamtam.ai/c/uz-brussel) (uzbrussel.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 | πŸ‡§πŸ‡ͺ Brussels | 2,704 | 1977 | | 12 | [EUROCONTROL](https://www.tamtam.ai/c/eurocontrol) (eurocontrol.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 | πŸ‡§πŸ‡ͺ Brussels | 2,639 | 1960 | | 13 | [NATO Communications and Information Agency (NCIA)](https://www.tamtam.ai/c/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 | πŸ‡§πŸ‡ͺ Brussels | 2,545 | 2012 | | 14 | [Cliniques universitaires Saint-Luc](https://www.tamtam.ai/c/cliniques-universitaires-saint-luc) (saintluc.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 | πŸ‡§πŸ‡ͺ Brussels | 1,889 | 1976 | | 15 | [Tessenderlo Group](https://www.tamtam.ai/c/tessenderlo-group) (tessenderlo.com)
Global industrial group specializing in agriculture, bio-residual valorization, machinery, mechanical engineering, electronics, energy, and water-focused industrial solutions. | Chemical Manufacturing | πŸ‡§πŸ‡ͺ Brussels | 1,800 | 1919 | | 16 | [SchrΓ©der](https://www.tamtam.ai/c/schreder) (schreder.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 | πŸ‡§πŸ‡ͺ Brussels | 1,002 | 1907 | | 17 | [Recticel](https://www.tamtam.ai/c/recticel) (recticel.com)
Innovative insulation solutions for buildings and acoustic needs, contributing to a carbon-free economy and better quality of life | Wholesale Building Materials | πŸ‡§πŸ‡ͺ Brussels | 879 | | | 18 | [Zetes Goods ID](https://www.tamtam.ai/c/zetes-goods-id) (zetes.com)
A technology company specializing in supply chain optimization and citizen identification solutions, providing agility, visibility, and secure authentication across EMEA | Software Development | πŸ‡§πŸ‡ͺ Brussels | 749 | 1984 | | 19 | [SABCA](https://www.tamtam.ai/c/sabca) (sabca.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 | πŸ‡§πŸ‡ͺ Brussels | 714 | 1920 | | 20 | [BSB](https://www.tamtam.ai/c/bsb) (vermeg.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 | πŸ‡§πŸ‡ͺ Brussels | 687 | | | 21 | [Fine Biscuits Company (FBC) Group](https://www.tamtam.ai/c/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 | πŸ‡§πŸ‡ͺ Brussels | 597 | | | 22 | [EDF EU Affairs](https://www.tamtam.ai/c/edf-eu-affairs) (edf.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 | πŸ‡§πŸ‡ͺ Brussels | 521 | 1946 | | 23 | [efficy CRM](https://www.tamtam.ai/c/efficy-crm) (efficy.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 | πŸ‡§πŸ‡ͺ Brussels | 450 | 2005 | | 24 | [Royal Military Academy, Belgium](https://www.tamtam.ai/c/royal-military-academy-belgium) (rma.ac.be)
Provides academic, military, and physical training for future officers, conducts advanced training and university-level research for Defence needs. | Higher Education | πŸ‡§πŸ‡ͺ Brussels | 333 | | | 25 | [3E](https://www.tamtam.ai/c/3e-brussels) (3e.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 | πŸ‡§πŸ‡ͺ Brussels | 271 | 1999 | | 26 | [addactis](https://www.tamtam.ai/c/addactis) (addactis.com)
Providing innovative software solutions and analytics to support insurers in managing risk across Life, Health, and P&C insurance sectors worldwide. | Insurance | πŸ‡§πŸ‡ͺ Brussels | 246 | 1993 | | 27 | [Cowboy](https://www.tamtam.ai/c/cowboy) (cowboy.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 | πŸ‡§πŸ‡ͺ Brussels | 246 | 2017 | | 28 | [Colas Belgium](https://www.tamtam.ai/c/colas-belgium) (colas.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 | πŸ‡§πŸ‡ͺ Brussels | 246 | 1998 | | 29 | [Sirris \| Innovation forward](https://www.tamtam.ai/c/sirris-innovation-forward) (sirris.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 | πŸ‡§πŸ‡ͺ Brussels | 227 | 1949 | | 30 | [Keyrock](https://www.tamtam.ai/c/keyrock) (keyrock.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 | πŸ‡§πŸ‡ͺ Brussels | 225 | 2017 | ## 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](https://www.tamtam.ai/l/largest-companies-brussels) (1,033) - [Multinational companies in Brussels](https://www.tamtam.ai/l/multinational-companies-brussels) (326) - [Financial services firms in Brussels](https://www.tamtam.ai/l/financial-services-firms-brussels) (96) - [Public sector organisations in Brussels](https://www.tamtam.ai/l/public-sector-organisations-brussels) (79) - [IT Services and IT Consulting companies in Brussels](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-brussels) (75) - [Retail chains in Brussels](https://www.tamtam.ai/l/retail-chains-brussels) (71) - [Critical infrastructure operators in Brussels](https://www.tamtam.ai/l/critical-infrastructure-operators-brussels) (70) - [Professional services firms in Brussels](https://www.tamtam.ai/l/professional-services-firms-brussels) (64) - [IT services companies in Brussels](https://www.tamtam.ai/l/it-services-companies-brussels) (63) - [Financial Services companies in Brussels](https://www.tamtam.ai/l/financial-services-companies-brussels) (54) - [SaaS companies in Brussels](https://www.tamtam.ai/l/saas-companies-brussels) (54) - [Consulting firms in Brussels](https://www.tamtam.ai/l/consulting-firms-brussels) (52) - [Government Administration companies in Brussels](https://www.tamtam.ai/l/government-administration-companies-brussels) (52) - [Insurance companies in Brussels](https://www.tamtam.ai/l/insurance-companies-brussels) (49) - [Software Development companies in Brussels](https://www.tamtam.ai/l/software-development-companies-brussels) (47) - [Companies with a mobile app in Brussels](https://www.tamtam.ai/l/companies-with-mobile-app-brussels) (42) - [Education providers in Brussels](https://www.tamtam.ai/l/education-companies-brussels) (38) - [Non-profit Organizations companies in Brussels](https://www.tamtam.ai/l/non-profit-organizations-companies-brussels) (38) - [Subscription businesses in Brussels](https://www.tamtam.ai/l/subscription-businesses-brussels) (38) - [Advertising Services companies in Brussels](https://www.tamtam.ai/l/advertising-services-companies-brussels) (34) - [Marketing and communications agencies in Brussels](https://www.tamtam.ai/l/marketing-agencies-brussels) (33) - [Hotel and hospitality groups in Brussels](https://www.tamtam.ai/l/hospitality-groups-brussels) (31) - [Manufacturers in Brussels](https://www.tamtam.ai/l/manufacturers-brussels) (30) - [Recruitment and staffing agencies in Brussels](https://www.tamtam.ai/l/recruitment-agencies-brussels) (29) ## The same list elsewhere in Belgium - [Companies with in-house R&D in Belgium](https://www.tamtam.ai/l/r-and-d-companies-belgium) (605) - [Companies with in-house R&D in Flanders](https://www.tamtam.ai/l/r-and-d-companies-flanders) (352) - [Companies with in-house R&D in Wallonia](https://www.tamtam.ai/l/r-and-d-companies-wallonia) (155) - [Companies with in-house R&D in Ghent](https://www.tamtam.ai/l/r-and-d-companies-ghent) (40) - [Companies with in-house R&D in Leuven](https://www.tamtam.ai/l/r-and-d-companies-leuven) (25) --- Source: https://www.tamtam.ai/l/r-and-d-companies-brussels