# 25 leading publicly traded companies in Brussels Tamtam tracks 25 publicly traded companies headquartered in Brussels. This list ranks all of them by number of employees on LinkedIn, led by Solvay, UCB and KBC Bank & Verzekering. Their median headcount is 398. Half of them were founded in 1993 or later. These publicly traded companies in Brussels are primarily large, established firms across diverse sectors. Key industries include chemical manufacturing with Solvay, Umicore, Syensqo, and Tessenderlo Group, all focused on sustainable solutions and advanced materials. Financial services are represented by KBC Bank & Verzekering, a major integrated bank-insurer, and investment management by D’Ieteren Group and GBL. UCB is a significant biopharmaceutical company, while Proximus Group provides telecommunications services. A notable pattern is the strong presence of chemical manufacturing companies, indicating a specialized industrial base in Brussels. Many of these firms, such as Solvay (founded 1863) and Umicore (founded 1805), have long histories, suggesting a mature and resilient corporate landscape. πŸ‡§πŸ‡ͺ Brussels Β· 25 companies Β· Updated Nov 12, 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 | [KBC Bank & Verzekering](https://www.tamtam.ai/c/kbc-bank-and-verzekering) (kbc.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 | Financial Services | πŸ‡§πŸ‡ͺ Brussels | 13,565 | 1998 | | 4 | [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 | | | 5 | [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 | | 6 | [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 | | 7 | [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 | | 8 | [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 | | 9 | [Marsh Europe](https://www.tamtam.ai/c/marsh-europe) (marsh.com)
Global leader in insurance brokerage and risk advisory services, offering data-driven solutions for commercial and individual clients worldwide Operating in 130+ countries | Professional Services | πŸ‡§πŸ‡ͺ Brussels | 1,682 | | | 10 | [Mercer Europe](https://www.tamtam.ai/c/mercer-europe) (corporate.marsh.com)
Dedicated to providing advisory services and technological solutions to help organizations meet workforce health, investment, and career needs Operating in multiple countries | Professional Services | πŸ‡§πŸ‡ͺ Brussels | 1,235 | 1993 | | 11 | [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 | | | 12 | [D’Ieteren Group](https://www.tamtam.ai/c/d-ieteren-group) (dieterengroup.com)
Manages and develops a portfolio of international businesses including vehicle glass repair, automotive distribution, parts, material handling, lifestyle brands, and real estate. | Investment Management | πŸ‡§πŸ‡ͺ Brussels | 405 | 1805 | | 13 | [Belgian Post Group](https://www.tamtam.ai/c/belgian-post-group) (bpost.be)
Leader in postal solutions and financial services, ensuring secure electronic delivery and customer satisfaction through simple processes and passionate employees | Transportation, Logistics, Supply Chain and Storage | πŸ‡§πŸ‡ͺ Brussels | 398 | | | 14 | [Spadel](https://www.tamtam.ai/c/spadel) (spadel.com)
A European group that produces and markets natural mineral waters, spring waters, and mineral water soft drinks focused on sustainability and local products | Manufacturing | πŸ‡§πŸ‡ͺ Brussels | 379 | | | 15 | [GBL (Groupe Bruxelles Lambert)](https://www.tamtam.ai/c/gbl-groupe-bruxelles-lambert) (gbl.be)
Established investment holding active in Europe with a diversified portfolio of listed, private, and alternative investments, focused on long-term value creation and responsible investing | Investment Management | πŸ‡§πŸ‡ͺ Brussels | 353 | 1902 | | 16 | [Sofina](https://www.tamtam.ai/c/sofina) (sofinagroup.com)
A Belgium-based investment company supporting entrepreneurs and families managing growing companies through direct investments and Private Equity funds in Europe, USA, and Asia | Venture Capital and Private Equity Principals | πŸ‡§πŸ‡ͺ Brussels | 317 | | | 17 | [Immobel](https://www.tamtam.ai/c/immobel) (immobelgroup.com)
A leading European real estate developer specializing in innovative urban projects with mixed functions and a focus on sustainability and social impact | Real Estate | πŸ‡§πŸ‡ͺ Brussels | 177 | 1863 | | 18 | [BIO - the Belgian Investment Company for Developing Countries](https://www.tamtam.ai/c/bio-the-belgian-investment-company-for-developing-countries) (bio-invest.be)
Investment in private sector projects in developing countries to promote economic growth, sustainable development, and achievement of Sustainable Development Goals. | Investment Banking | πŸ‡§πŸ‡ͺ Brussels | 98 | 2001 | | 19 | [Cenergy Holdings](https://www.tamtam.ai/c/cenergy-holdings) (cenergyholdings.com)
Investment group focusing on energy transfer, renewables, and data transmission, aiming for a low carbon economy and leading roles in industrial sectors | Manufacturing | πŸ‡§πŸ‡ͺ Brussels | 64 | 2016 | | 20 | [Di](https://www.tamtam.ai/c/di) (di.be)
A customer service company in Brussels, belonging to Bogart SA, offering email support, phone services, and a VAT number | Retail | πŸ‡§πŸ‡ͺ Brussels | 48 | 1975 | | 21 | [STIK](https://www.tamtam.ai/c/stik) (stik-cbd.be)
The company sells high quality organic Hemp Flowers (CBD) and E-Liquids, free from any chemical products | Retail | πŸ‡§πŸ‡ͺ Brussels | 41 | 2019 | | 22 | [Securitas Europe](https://www.tamtam.ai/c/securitas-europe) (securitas.com)
A European company offering comprehensive security services, specializing in airport security and serving a diverse range of industries and clients | Security & Investigations | πŸ‡§πŸ‡ͺ Brussels | 39 | 1933 | | 23 | [Banimmo](https://www.tamtam.ai/c/banimmo) (banimmo.be)
Real estate developer with over 20 years of experience, focusing on innovative solutions and customer needs, with potential for significant development | Real Estate | πŸ‡§πŸ‡ͺ Brussels | 32 | 1998 | | 24 | [Queserser & Company EU](https://www.tamtam.ai/c/queserser-and-company-eu) (queserser.eu)
A creative communications, marketing, and production company based in Japan with multiple branches globally Specializing in omnichannel optimization and foreign market entry | Design Services | πŸ‡§πŸ‡ͺ Brussels | 6 | 2005 | | 25 | [Weichie.com](https://www.tamtam.ai/c/weichie-com) (weichie.com)
A digital agency in Brussels and New York specializing in creating high-quality websites, e-commerce platforms, and applications for brands Promoting businesses online | Technology, Information and Internet | πŸ‡§πŸ‡ͺ Brussels | 4 | 2018 | ## 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 12, 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) - [Companies with in-house R&D in Brussels](https://www.tamtam.ai/l/r-and-d-companies-brussels) (60) - [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) ## The same list elsewhere in Belgium - [Publicly traded companies in Belgium](https://www.tamtam.ai/l/publicly-traded-companies-belgium) (134) - [Publicly traded companies in Flanders](https://www.tamtam.ai/l/publicly-traded-companies-flanders) (94) ## The same list elsewhere - [Publicly traded companies in the world](https://www.tamtam.ai/l/publicly-traded-companies-in-the-world) (11,535) - [Publicly traded companies in Europe](https://www.tamtam.ai/l/publicly-traded-companies-in-europe) (3,623) --- Source: https://www.tamtam.ai/l/publicly-traded-companies-brussels