# The 50 largest companies with in-house R&D in Luxembourg
Tamtam tracks 55 companies with in-house R&D headquartered in Luxembourg. This list ranks the 50 largest by number of employees on LinkedIn, led by ArcelorMittal, Ferrero and Eurofins. Their median headcount is 588. Half of them were founded in 1996 or later.
The companies listed in Luxembourg are predominantly large, established firms with significant employee numbers, indicating a mature industrial and technological landscape. Many operate in heavy industries and manufacturing, alongside a strong presence in IT and specialized services. ArcelorMittal is a global leader in steel and mining, Ferrero produces confectionery, and Eurofins offers analytical testing services. Aperam is a global stainless steel company, SES Satellites delivers connectivity solutions, and the University of Luxembourg focuses on research.
A notable pattern among these companies is the prevalence of headquarters in Luxembourg City itself, with several other major players located in nearby towns such as Betzdorf and Esch-sur-Alzette. This suggests a concentrated hub for large-scale operations and R&D activities within the Grand Duchy.
π±πΊ Luxembourg Β· 50 companies Β· Updated Nov 12, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [ArcelorMittal](https://www.tamtam.ai/c/arcelormittal) (arcelormittal.com)
A global leader in steel and mining, producing safe, sustainable steel for various industries, with a focus on research, development, and responsible operations | Mining | π±πΊ L-1160 Luxembourg | 63,308 | |
| 2 | [Ferrero](https://www.tamtam.ai/c/ferrero) (ferrerocareers.com)
A family-owned business producing iconic confectionery products sold worldwide, committed to quality, innovation, and sustainability, offering diverse career opportunities | Manufacturing | π±πΊ Senningerberg | 32,545 | 1946 |
| 3 | [Eurofins](https://www.tamtam.ai/c/eurofins) (eurofins.com)
An international life sciences company offering analytical testing services in food, environmental, pharmaceutical, and cosmetic industries, ensuring safety and authenticity | Biotechnology Research | π±πΊ Luxembourg | 24,896 | |
| 4 | [Aperam](https://www.tamtam.ai/c/aperam) (aperam.com)
A global stainless steel company prioritizing sustainability, producing steel with high recycled content and renewable energy sources, and focusing on long-lasting, affordable solutions | Manufacturing | π±πΊ Luxembourg | 7,169 | 2011 |
| 5 | [SES Satellites](https://www.tamtam.ai/c/ses-satellites) (ses.com)
Delivering global content connectivity solutions through a vast network of satellites to enrich personal stories and connect more people worldwide | Telecommunications | π±πΊ Betzdorf | 6,903 | |
| 6 | [University of Luxembourg](https://www.tamtam.ai/c/university-of-luxembourg) (wwwen.uni.lu)
Multilingual, international University in Luxembourg focusing on research, offering a multicultural environment with over 60 degrees and strong international rankings | Higher Education | π±πΊ Esch-sur-Alzette | 3,226 | 2003 |
| 7 | [PM International](https://www.tamtam.ai/c/pm-international) (pm-international.com)
Global leader in developing, manufacturing, and distributing premium health, fitness, and beauty products with a focus on quality and innovation. | Wellness and Fitness Services | π±πΊ Schengen | 2,725 | 1993 |
| 8 | [Armacell](https://www.tamtam.ai/c/armacell) (armacell.com)
Innovative provider of thermal, acoustic, and mechanical solutions utilizing engineered foams for global energy efficiency and sustainable value creation | Wholesale Building Materials | π±πΊ Luxembourg | 1,712 | 2000 |
| 9 | [Netcompany-Intrasoft](https://www.tamtam.ai/c/netcompany-intrasoft) (netcompany.com)
A leading European IT Solutions and Services Group, offering innovative solutions to international and national public and private organizations worldwide | IT Services and IT Consulting | π±πΊ Luxembourg | 1,687 | 1996 |
| 10 | [Aylo](https://www.tamtam.ai/c/aylo-luxembourg) (aylo.com)
A tech pioneer offering diverse and popular adult content platforms focused on celebrating diversity, inclusion, expression, and maintaining trust and safety protocols | Software Development | π±πΊ Luxembourg | 1,512 | |
| 11 | [CSM Bakery Solutions](https://www.tamtam.ai/c/csm-bakery-solutions) (csmingredients.com)
Company rebranding from bakery solutions to ingredients, focusing on innovation, sustainability, people, and growth updates on LinkedIn. | Food and Beverage Manufacturing | π±πΊ Bertrange | 1,472 | |
| 12 | [FANUC Europe](https://www.tamtam.ai/c/fanuc-europe) (fanuc.eu)
Provides CNC systems, industrial robots, and factory automation solutions for automotive, aerospace, electronics, and healthcare industries across Europe. | Automation Machinery Manufacturing | π±πΊ Echternach | 1,465 | 1972 |
| 13 | [Paul Wurth S.A.](https://www.tamtam.ai/c/paul-wurth-s-a) (paulwurth.lu)
Design and construction of blast furnaces, cokemaking, direct reduction, recycling plants with engineering, project management, and digital services. | Industrial Machinery Manufacturing | π±πΊ Luxembourg | 1,314 | 1870 |
| 14 | [SWM International](https://www.tamtam.ai/c/swm-international) (swmintl.com)
Development of sustainable, safe, and intelligent lightweight materials using botanicals and natural fibres to address industry challenges. | Paper and Forest Product Manufacturing | π±πΊ Contern | 1,304 | |
| 15 | [Zitro](https://www.tamtam.ai/c/zitro) (zitrogames.com)
Innovative international gaming company specializing in video bingo games, known for its cutting-edge technology, innovations, and top talent in Barcelona | Entertainment Providers | π±πΊ Luxembourg | 1,251 | 2007 |
| 16 | [CERATIZIT](https://www.tamtam.ai/c/ceratizit) (ceratizit.com)
Develops and produces hard material cutting and wear protection solutions including specialized cutting tools, inserts, rods, carbide, and cermet grades. | Metalworking Machinery Manufacturing | π±πΊ Mamer | 1,249 | 1921 |
| 17 | [Cebi Group](https://www.tamtam.ai/c/cebi-group) (cebi.com)
A global leader in pumps, washer systems, and temperature sensors for automotive and household appliances, with 11 production sites and worldwide distribution | Manufacturing | π±πΊ Steinsel | 1,100 | 1976 |
| 18 | [IEE Sensing](https://www.tamtam.ai/c/iee-sensing) (iee-sensing.com)
Global leader in developing and manufacturing advanced sensing solutions for automotive, building management, security, sports, and healthcare applications with a strong focus on innovation and R&D | Appliances, Electrical, and Electronics Manufacturing | π±πΊ Bissen | 1,087 | 1989 |
| 19 | [SaarGummi Group](https://www.tamtam.ai/c/saargummi-group) (saargummi.com)
A global full service supplier specializing in body seals and mouldings, offering expertise in materials development, product design, and complex sealing systems | Motor Vehicle Manufacturing | π±πΊ Remich | 1,045 | 1947 |
| 20 | [Luxembourg Institute of Science and Technology (LIST)](https://www.tamtam.ai/c/luxembourg-institute-of-science-and-technology-list) (list.lu)
Research and technology organization developing market-oriented prototypes, transforming scientific knowledge into technologies, data, and tools for stakeholders. | Research Services | π±πΊ Esch-sur-Alzette | 881 | 2015 |
| 21 | [Eurofins Consumer Product Testing](https://www.tamtam.ai/c/eurofins-consumer-product-testing) (eurofins.com)
Specializing in non-food consumer product testing, the company offers tailored quality assurance solutions, from supplier assessment to compliance, including testing, inspections, and regulatory guidance globally | International Trade and Development | π±πΊ Luxembourg | 734 | 1987 |
| 22 | [Rotarex](https://www.tamtam.ai/c/rotarex) (rotarex.com)
A global leader in designing and manufacturing premium gas control products, solving customer challenges and providing innovative solutions worldwide | Manufacturing | π±πΊ Lintgen | 720 | 1922 |
| 23 | [Jindal Films](https://www.tamtam.ai/c/jindal-films) (jindalfilms.com)
Development and manufacture of specialty films for flexible packaging and labeling, offering barrier and recyclable film solutions globally. | Packaging and Containers Manufacturing | π±πΊ Windhof | 717 | |
| 24 | [ArcelorMittal Downstream Solutions](https://www.tamtam.ai/c/arcelormittal-downstream-solutions) (corporate.arcelormittal.com)
A global team under ArcelorMittal provides steel solutions to various industries, emphasizing growth, leadership development, and international opportunities | Primary Metal Manufacturing | π±πΊ Luxembourg | 595 | |
| 25 | [ArcelorMittal Europe](https://www.tamtam.ai/c/arcelormittal-europe) (europe.arcelormittal.com)
Leading producer of flat and long steel products for automotive, construction, and packaging sectors through extensive research, development, and distribution networks across Europe. | Mining | π±πΊ L-1160 Luxembourg | 588 | 2006 |
| 26 | [Tractel](https://www.tamtam.ai/c/tractel) (tractel.com)
A global safety specialist offering innovative height safety, load measurement, lifting, access solutions, and services for industrial, construction, energy, and infrastructure projects | Machinery Manufacturing | π±πΊ Foetz | 578 | 1941 |
| 27 | [VTS Group](https://www.tamtam.ai/c/vts-group) (vtsgroup.com)
A leading supplier of air handling units and heating equipment, offering innovative products at competitive prices with a focus on employee development and a strong work culture | Industrial Machinery Manufacturing | π±πΊ Luxembourg | 512 | 1989 |
| 28 | [CSM Ingredients](https://www.tamtam.ai/c/csm-ingredients) (csmingredients.com)
Global manufacturer of innovative food ingredients and tailored solutions serving artisanal, industrial, foodservice, and retail sectors worldwide. | Food and Beverage Manufacturing | π±πΊ Luxembourg | 493 | |
| 29 | [ArcelorMittal Luxembourg](https://www.tamtam.ai/c/arcelormittal-luxembourg) (luxembourg.arcelormittal.com)
A steel production company in Luxembourg with 8 sites, specializing in long products like beams and rails for construction and infrastructure projects | Manufacturing | π±πΊ Luxembourg | 463 | 1911 |
| 30 | [Socfin](https://www.tamtam.ai/c/socfin) (socfin.com)
Specializing in oil palm and rubber tree plantations, this company manages 15 projects across Africa and Southeast Asia, focusing on expertise and social adaptability | Farming | π±πΊ Luxembourg | 376 | 1905 |
| 31 | [NMC sa](https://www.tamtam.ai/c/nmc-sa) (nmc.eu)
International market leader developing, producing, and marketing synthetic foams for interior decoration, insulation, industry, packaging, sports, and leisure across twenty-five global locations. | Plastics Manufacturing | π±πΊ Wemperhardt | 338 | 1950 |
| 32 | [UNITED CAPS](https://www.tamtam.ai/c/united-caps) (unitedcaps.com)
Designs, produces high-performance plastic caps and closures. Offers advanced standard and bespoke solutions to safeguard product integrity, assure safety, and protect brand reputation. | Packaging and Containers Manufacturing | π±πΊ Wiltz | 317 | 1939 |
| 33 | [Ravago Chemicals](https://www.tamtam.ai/c/ravago-chemicals) (ravagochemicals.com)
Global provider of high-quality chemical materials and specialty additives, offering tailored solutions, value-added services, and comprehensive product portfolio for various industries worldwide | Chemical Manufacturing | π±πΊ Luxemburg | 290 | |
| 34 | [Faymonville Trailers to the MAX](https://www.tamtam.ai/c/faymonville-trailers-to-the-max) (faymonville.com)
It manufactures special vehicles for heavy transport, offering solutions for loads from 20t to 500t, with a focus on innovation. | Machinery Manufacturing | π±πΊ Lentzweiler | 272 | |
| 35 | [OCSiAl Group](https://www.tamtam.ai/c/ocsial-group) (tuball.com)
A global leader in manufacturing graphene nanotubes with unique properties for various industries, offering nanotube concentrates to enhance materials | Manufacturing | π±πΊ Luxembourg | 229 | 2010 |
| 36 | [Kyotec](https://www.tamtam.ai/c/kyotec) (kyotecgroup.com)
Specialist in complex, multi-material building envelopes focusing on energy-efficient faΓ§ades for large-scale architectural and environmental projects. | Construction | π±πΊ Bissen | 190 | 2008 |
| 37 | [TOPIC Embedded Systems](https://www.tamtam.ai/c/topic-embedded-systems) (topic.nl)
Develops embedded systems, including software and hardware, for high-tech companies across various sectors, offering consultancy, projects, and proprietary products. | Software Development | π±πΊ Best | 163 | 1996 |
| 38 | [Laboratoires Reunis](https://www.tamtam.ai/c/laboratoires-reunis) (labo.lu)
The company focuses on providing quality healthcare services through research and technology, specializing in personalized medicine, genetic testing, and molecular diagnostics for infectious diseases | Hospitals and Health Care | π±πΊ Junglinster | 107 | 1996 |
| 39 | [Nivalis Energy Europe](https://www.tamtam.ai/c/nivalis-energy-europe) (e-mobility.solaredge.com)
Innovative e-mobility solutions for electric and hybrid vehicles, including powertrains, batteries, chargers, and vehicle control units for superior performance | Renewable Energy Equipment Manufacturing | π±πΊ Luxembourg | 101 | 2015 |
| 40 | [ClearSpace](https://www.tamtam.ai/c/clearspace) (clearspace.today)
In-orbit service missions enabling a sustainable space industry, akin to a tow truck service for outer space, offered by ClearSpace | Aviation and Aerospace Component Manufacturing | π±πΊ Luxembourg | 90 | 2018 |
| 41 | [Gradel S.Γ r.l.](https://www.tamtam.ai/c/gradel-s-a-r-l) (gradel.lu)
Gradel is an innovative, quality-driven company specializing in specialized equipment for nuclear maintenance, satellite handling, glass industry, and ultralightweight structures across industries | Engineering Services | π±πΊ Ellange | 84 | 1965 |
| 42 | [LuxSpace](https://www.tamtam.ai/c/luxspace) (luxspace.lu)
Luxembourg-based company specializing in designing, manufacturing, and testing microsatellites and aerospace systems, offering innovative services to international agencies and the space industry | Defense and Space Manufacturing | π±πΊ Betzdorf | 76 | 2004 |
| 43 | [BΓ©tons Feidt S.A](https://www.tamtam.ai/c/betons-feidt-s-a) (betonsfeidt.lu)
A leading concrete manufacturer in Luxembourg and the Greater Region, offering a wide range of ready-mix concretes and prefabricated products to meet various construction needs | Construction | π±πΊ Luxembourg | 69 | 1958 |
| 44 | [Rakuten Europe](https://www.tamtam.ai/c/rakuten-europe) (corp.rakuten.eu)
A global internet services leader offering e-commerce, fintech, digital content, and communication solutions to 16 billion members worldwide through diverse business units in Europe | Technology, Information and Internet | π±πΊ Luxembourg | 67 | 2013 |
| 45 | [NoMachine](https://www.tamtam.ai/c/nomachine) (nomachine.com)
A global network computing company with headquarters in Luxembourg, delivering remote connectivity solutions to consumers, businesses, government, and education sectors worldwide | Software Development | π±πΊ Grand Duchy of Luxembourg | 61 | 2003 |
| 46 | [EmTroniX](https://www.tamtam.ai/c/emtronix) (emtronix.lu)
This company designs and produces advanced electronics and embedded software for the New Space industry, offering solutions for various technological needs | Aviation and Aerospace Component Manufacturing | π±πΊ Hautcharage | 46 | 2001 |
| 47 | [AutoTuner](https://www.tamtam.ai/c/autotuner) (autotuner.com)
A next-generation chiptuning tool with Boot, bench, and OBD compatibility, intuitive software, data logging, and strong automotive electronics background | Motor Vehicle Manufacturing | π±πΊ Redange | 35 | 2014 |
| 48 | [Odysseus Space](https://www.tamtam.ai/c/odysseus-space) (odysseus.space)
Develops space-to-ground laser communication solutions for high data transfer, including optical ground stations, satellite terminals and space-to-drone optical systems. | Aviation and Aerospace Component Manufacturing | π±πΊ Belvaux | 34 | 2019 |
| 49 | [UJET](https://www.tamtam.ai/c/ujet) (ujet.com)
Innovative global tech company creating pioneering urban mobility solutions through expertise in clean technology, materials science, connectivity, and elegant design | Motor Vehicle Manufacturing | π±πΊ Leudelange | 28 | 2015 |
| 50 | [Ypso-Facto](https://www.tamtam.ai/c/ypso-facto) (ypsofacto.com)
Ypso-Facto develops and optimizes (bio)processes, providing software and consultancy services for process modeling, simulation, data analysis, and more | Pharmaceutical Manufacturing | π±πΊ Walferdange | 24 | 2014 |
## 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 Luxembourg
- [The largest companies in Luxembourg](https://www.tamtam.ai/l/largest-companies-luxembourg) (799)
- [Multinational companies in Luxembourg](https://www.tamtam.ai/l/multinational-companies-luxembourg) (340)
- [Financial services firms in Luxembourg](https://www.tamtam.ai/l/financial-services-firms-luxembourg) (255)
- [Financial Services companies in Luxembourg](https://www.tamtam.ai/l/financial-services-companies-luxembourg) (171)
- [Critical infrastructure operators in Luxembourg](https://www.tamtam.ai/l/critical-infrastructure-operators-luxembourg) (79)
- [Investment Management companies in Luxembourg](https://www.tamtam.ai/l/investment-management-companies-luxembourg) (75)
- [Venture capital and private equity firms in Luxembourg](https://www.tamtam.ai/l/vc-and-private-equity-firms-luxembourg) (71)
- [Manufacturers in Luxembourg](https://www.tamtam.ai/l/manufacturers-luxembourg) (59)
- [Professional services firms in Luxembourg](https://www.tamtam.ai/l/professional-services-firms-luxembourg) (56)
- [IT Services and IT Consulting companies in Luxembourg](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-luxembourg) (42)
- [SaaS companies in Luxembourg](https://www.tamtam.ai/l/saas-companies-luxembourg) (41)
- [Corporate groups and holding companies in Luxembourg](https://www.tamtam.ai/l/holding-companies-luxembourg) (39)
- [Consulting firms in Luxembourg](https://www.tamtam.ai/l/consulting-firms-luxembourg) (37)
- [Retail chains in Luxembourg](https://www.tamtam.ai/l/retail-chains-luxembourg) (37)
- [IT services companies in Luxembourg](https://www.tamtam.ai/l/it-services-companies-luxembourg) (37)
- [Software Development companies in Luxembourg](https://www.tamtam.ai/l/software-development-companies-luxembourg) (36)
- [Banking companies in Luxembourg](https://www.tamtam.ai/l/banking-companies-luxembourg) (34)
- [Public sector organisations in Luxembourg](https://www.tamtam.ai/l/public-sector-organisations-luxembourg) (34)
- [Family-owned companies in Luxembourg](https://www.tamtam.ai/l/family-owned-companies-luxembourg) (32)
- [Logistics companies in Luxembourg](https://www.tamtam.ai/l/logistics-companies-luxembourg) (31)
- [Construction companies in Luxembourg](https://www.tamtam.ai/l/construction-companies-luxembourg) (30)
- [Transportation, Logistics, Supply Chain and Storage companies in Luxembourg](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-luxembourg) (30)
- [Insurance companies in Luxembourg](https://www.tamtam.ai/l/insurance-companies-luxembourg) (29)
- [Hardware manufacturers in Luxembourg](https://www.tamtam.ai/l/hardware-companies-luxembourg) (28)
## The same list elsewhere
- [Companies with in-house R&D in the world](https://www.tamtam.ai/l/r-and-d-companies-in-the-world) (34,346)
- [Companies with in-house R&D in Europe](https://www.tamtam.ai/l/r-and-d-companies-in-europe) (20,169)
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Source: https://www.tamtam.ai/l/r-and-d-companies-luxembourg