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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
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 | |||
| 2 | 14,875 | ||||
| 3 |
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 | |||
| 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 |
7,776 | |||
| 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. |
7,700 | |||
| 6 |
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 | |||
| 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 |
6,082 | |||
| 8 |
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 | |||
| 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 |
3,196 | |||
| 10 |
Elia Groupelia.be
Operation of extensive high-voltage electricity transmission networks in Belgium and Germany, ensuring balanced supply and supporting energy transition. |
2,759 | |||
| 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 |
2,704 | |||
| 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 |
2,639 | |||
| 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 |
2,545 | |||
| 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 |
1,889 | |||
| 15 |
Tessenderlo Grouptessenderlo.com
Global industrial group specializing in agriculture, bio-residual valorization, machinery, mechanical engineering, electronics, energy, and water-focused industrial solutions. |
1,800 | |||
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 |
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 |
1,002 | |||
| 17 |
Recticelrecticel.com
Innovative insulation solutions for buildings and acoustic needs, contributing to a carbon-free economy and better quality of life |
879 | |||
| 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 |
749 | |||
| 19 | 714 | ||||
| 20 |
BSBvermeg.com
Provider of software solutions for various financial sectors including insurance, securities, wealth management, and institutional portfolio management, with offices across Europe |
687 | |||
| 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 |
597 | |||
| 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 |
521 | |||
| 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. |
450 | |||
| 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. |
333 | |||
| 25 | 271 | ||||
| 26 |
addactisaddactis.com
Providing innovative software solutions and analytics to support insurers in managing risk across Life, Health, and P&C insurance sectors worldwide. |
246 | |||
| 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. |
246 | |||
| 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 |
246 | |||
| 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. |
227 | |||
| 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. |
225 | |||
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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.
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