# The 50 largest companies with in-house R&D in Gelderland

Tamtam tracks 101 companies with in-house R&D headquartered in Gelderland. This list ranks the 50 largest by number of employees on LinkedIn, led by Nexperia, Radboudumc and Alliander. Their median headcount is 724. Half of them were founded in 1966 or later. The most common headquarters are Nijmegen (10), Apeldoorn (7) and Arnhem (7).

These Gelderland companies with in-house R&D are primarily large organizations in healthcare, education, and food production. Notable examples include Nexperia, a global semiconductor company, Radboudumc, an academic medical center, and Wageningen University & Research, which focuses on healthy food and living environments. Alliander is a Dutch energy network company, while Royal De Heus specializes in animal nutrition products, and Plukon Food Group produces poultry and alternative proteins.

The data shows a strong concentration of headquarters in Nijmegen, Arnhem, and Apeldoorn. Many of these entities, such as Wageningen University & Research (founded 1918) and Royal De Heus (founded 1917), have a long history, indicating well-established institutions and businesses in the region.

🇳🇱 Gelderland · 50 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Nexperia](https://www.tamtam.ai/c/nexperia) (nexperia.com)<br>Global semiconductor company with expertise in essential component development, serving diverse industries worldwide, committed to innovation, efficiency, and sustainability | Semiconductor Manufacturing | 🇳🇱 Nijmegen | 12,000 |  |
| 2 | [Radboudumc](https://www.tamtam.ai/c/radboudumc) (radboudumc.nl)<br>Leading academic center for medical science, education, and patient care; connecting research, education, and patient care for future healthcare and medical science. | Hospitals and Health Care | 🇳🇱 Nijmegen | 9,995 | 1956 |
| 3 | [Alliander](https://www.tamtam.ai/c/alliander) (alliander.com)<br>A Dutch energy network company responsible for distributing gas and electricity, promoting sustainable energy solutions, and ensuring equal access to reliable energy | Utilities | 🇳🇱 Arnhem | 9,523 | 2009 |
| 4 | [Wageningen University & Research](https://www.tamtam.ai/c/wageningen-university-and-research) (wur.nl)<br>Education and research focused on healthy food and living environments, combining natural and social sciences for practical scientific breakthroughs. | Research Services | 🇳🇱 Wageningen | 9,227 | 1918 |
| 5 | [Radboud University](https://www.tamtam.ai/c/radboud-university) (ru.nl)<br>A public university in Nijmegen, Netherlands known for its research focus, established in 1923, offering seven faculties and serving over 19,130 students | Research Services | 🇳🇱 Nijmegen | 7,525 | 1923 |
| 6 | [Pro Persona](https://www.tamtam.ai/c/pro-persona) (propersona.nl)<br>A major employer in healthcare, providing treatment, support, and new perspectives to improve quality of life and contribute to community safety | Mental Health Care | 🇳🇱 Wolfheze | 2,627 |  |
| 7 | [Gelre ziekenhuizen](https://www.tamtam.ai/c/gelre-ziekenhuizen) (gelreziekenhuizen.nl)<br>A large hospital in the Netherlands with a focus on improvement, innovation, education, and research, serving a region with multiple facilities | Hospitals and Health Care | 🇳🇱 Apeldoorn | 2,602 |  |
| 8 | [Royal De Heus](https://www.tamtam.ai/c/royal-de-heus) (deheus.com)<br>A global family-owned company providing safe, healthy animal nutrition products and knowledge to help farmers worldwide in sustainable food production | Animal Feed Manufacturing | 🇳🇱 Ede | 2,153 | 1917 |
| 9 | [Politieacademie](https://www.tamtam.ai/c/politieacademie) (politieacademie.nl)<br>The company focuses on training, research, and knowledge development for police officers, working with students, practitioners, and international partners to build a strong future for law enforcement | Public Safety | 🇳🇱 Apeldoorn | 2,126 |  |
| 10 | [Ziekenhuis Gelderse Vallei](https://www.tamtam.ai/c/ziekenhuis-gelderse-vallei) (geldersevallei.nl)<br>Dedicated to knowledge and focused on health, this hospital offers a wide range of medical specialties with a strong emphasis on nutrition and exercise | Hospitals and Health Care | 🇳🇱 Ede | 1,911 |  |
| 11 | [Plukon Food Group](https://www.tamtam.ai/c/plukon-food-group) (plukon.com)<br>An innovative European producer of foods, specializing in fresh, sustainable poultry, vegetarian, and alternative protein products for supermarkets and quick-service restaurants | Food and Beverage Manufacturing | 🇳🇱 Wezep | 1,693 | 1894 |
| 12 | [Royal Agrifirm Group](https://www.tamtam.ai/c/royal-agrifirm-group) (agrifirm.com)<br>Collaborates with farmers and partners to develop innovative, sustainable agricultural methods ensuring healthy soil, animals, nature, and fair farmer income. | Farming | 🇳🇱 Apeldoorn | 1,430 | 1892 |
| 13 | [Synthon](https://www.tamtam.ai/c/synthon) (synthon.com)<br>An international pharmaceutical company specializing in developing and manufacturing high-quality generic medicines to improve global health and increase access to affordable treatments | Pharmaceutical Manufacturing | 🇳🇱 Nijmegen | 1,337 | 1991 |
| 14 | [Nedap](https://www.tamtam.ai/c/nedap) (nedap.com)<br>Development and implementation of digital twin technology across healthcare, livestock, retail, and security sectors to create sustainable, innovative solutions. | IT Services and IT Consulting | 🇳🇱 Groenlo | 1,299 | 1929 |
| 15 | [ArtEZ University of the Arts](https://www.tamtam.ai/c/artez-university-of-the-arts) (artez.nl)<br>A diverse, international community focused on artistic, intellectual, and personal growth through inspiring art education and leading artistic research | Higher Education | 🇳🇱 Arnhem | 1,296 |  |
| 16 | [Teijin Aramid](https://www.tamtam.ai/c/teijin-aramid) (teijinaramid.com)<br>Global leader in high-performance aramid fiber, specializing in innovative solutions for diverse industries, driving sustainability and collaboration for a better future | Chemical Manufacturing | 🇳🇱 Arnhem | 1,171 | 1983 |
| 17 | [Planon](https://www.tamtam.ai/c/planon) (planonsoftware.com)<br>Provider of Smart Sustainable Building Management software connecting buildings, people, and processes to create efficient, engaging, and sustainable spaces for all stakeholders | IT Services and IT Consulting | 🇳🇱 Nijmegen | 1,150 | 1982 |
| 18 | [Cito](https://www.tamtam.ai/c/cito) (cito.nl)<br>With over 50 years of experience, we develop tests and exams with a focus on equal opportunities in education, offering advice and services Contact us via phone, email, or social media | Education Administration Programs | 🇳🇱 Arnhem | 1,057 |  |
| 19 | [Karakter kinder- en jeugdpsychiatrie](https://www.tamtam.ai/c/karakter-kinder-en-jeugdpsychiatrie) (karakter.com)<br>An academic center specializing in child and adolescent psychiatry providing diagnosis and treatment for various psychiatric disorders, offering therapies, medication, and research-based care | Mental Health Care | 🇳🇱 Ede | 991 | 1967 |
| 20 | [CRV](https://www.tamtam.ai/c/crv-arnhem) (crv4all.com)<br>CRV specializes in cattle improvement through genetic products, on-farm services, and digital information They provide solutions for farmers worldwide | Ranching | 🇳🇱 Arnhem | 971 | 1874 |
| 21 | [VMI Group](https://www.tamtam.ai/c/vmi-group) (vmi-group.com)<br>Global leader in tire manufacturing machinery, providing technical innovations and support to keep manufacturers ahead in their markets worldwide | Machinery Manufacturing | 🇳🇱 Epe | 961 | 1945 |
| 22 | [BDR Thermea Group](https://www.tamtam.ai/c/bdr-thermea-group) (bdrthermeagroup.com)<br>Manufacture and supply of sustainable heating technologies including heat pumps, hybrid and hydrogen boilers to reduce carbon emissions globally. | Appliances, Electrical, and Electronics Manufacturing | 🇳🇱 Apeldoorn | 849 |  |
| 23 | [Ampleon](https://www.tamtam.ai/c/ampleon) (ampleon.com)<br>A global leader in RF power technology, Ampleon specializes in high frequency applications using GaN and LDMOS technologies to drive innovation and success for customers worldwide | Semiconductor Manufacturing | 🇳🇱 Nijmegen | 842 | 2015 |
| 24 | [Weener Plastics Group](https://www.tamtam.ai/c/weener-plastics-group) (silgandispensing.com)<br>A global supplier of sustainable plastic packaging solutions for various markets, designing and manufacturing caps, closures, bottles, and jars Headquartered in The Netherlands with 25 facilities worldwide | Packaging and Containers Manufacturing | 🇳🇱 Ede | 828 | 1953 |
| 25 | [AWL](https://www.tamtam.ai/c/awl-harderwijk) (awl.nl)<br>Global machine builder specializing in smart automation solutions for various industries, fostering a collaborative and inclusive work environment for over 750 employees worldwide | Automation Machinery Manufacturing | 🇳🇱 Harderwijk | 724 | 1993 |
| 26 | [Nijhuis Saur Industries](https://www.tamtam.ai/c/nijhuis-saur-industries) (nijhuissaurindustries.com)<br>Providing sustainable water use solutions, energy and resource recovery, engineering, consultancy, project execution, and mobile water services worldwide. | Environmental Services | 🇳🇱 Doetinchem | 641 | 1904 |
| 27 | [Nederlands Instituut Publieke Veiligheid (NIPV)](https://www.tamtam.ai/c/nederlands-instituut-publieke-veiligheid-nipv) (nipv.nl)<br>The IFV strengthens fire services, disaster response, and crisis management for safety regions through policy support, expertise, and research | Higher Education | 🇳🇱 Arnhem | 639 |  |
| 28 | [Royal Kaak](https://www.tamtam.ai/c/royal-kaak) (kaak.com)<br>Specializing in bakery technology since 1846, offering standalone machines and integrated solutions for automated bakery lines, meeting and exceeding customer expectations | Machinery Manufacturing | 🇳🇱 Terborg | 630 | 1846 |
| 29 | [MARIN (Maritime Research Institute Netherlands)](https://www.tamtam.ai/c/marin-maritime-research-institute-netherlands) (marin.nl)<br>Global institute for hydrodynamic and nautical research, offering integrated solutions for clean, smart, and safe shipping, promoting sustainability and innovation in the maritime sector | Research Services | 🇳🇱 Wageningen | 629 | 1929 |
| 30 | [Bronkhorst](https://www.tamtam.ai/c/bronkhorst) (bronkhorst.com)<br>Manufacturer of Mass Flow and Pressure Meters/Controllers for gases and liquids with worldwide presence, focus on innovation, quality, and customer satisfaction | Automation Machinery Manufacturing | 🇳🇱 Ruurlo | 614 | 1981 |
| 31 | [Rademaker BV](https://www.tamtam.ai/c/rademaker-bv) (rademaker.com)<br>Design and supply of efficient, automated bakery production lines for breads, pastries, pizza, and other dough-based products worldwide. | Machinery Manufacturing | 🇳🇱 Culemborg | 555 | 1977 |
| 32 | [Barenbrug Group](https://www.tamtam.ai/c/barenbrug-group) (barenbrug.com)<br>Developing a wide range of grass varieties for various purposes, including cattle feed, parks, lawns, sports fields, and recreation areas | Biotechnology Research | 🇳🇱 Nijmegen | 537 | 1904 |
| 33 | [Symeres](https://www.tamtam.ai/c/symeres) (symeres.com)<br>Leading transatlantic CRO with 600 scientists offering solutions for drug discovery and development, from hit finding to clinical API delivery Innovative and client-focused | Biotechnology Research | 🇳🇱 Nijmegen | 507 | 1987 |
| 34 | [Royal SMIT Transformers B.V.](https://www.tamtam.ai/c/royal-smit-transformers-b-v) (werkenbij.sgb-smit.group)<br>A transformer specialist in Europe, designing and producing large power transformers, reactors, and more with innovative technology for nearly 100 years | Industrial Machinery Manufacturing | 🇳🇱 Nijmegen | 501 | 1913 |
| 35 | [Remeha](https://www.tamtam.ai/c/remeha) (remeha.nl)<br>A Dutch company specializing in innovative and energy-efficient heating products for homes and businesses, part of an international group with a wide presence | Manufacturing | 🇳🇱 Apeldoorn | 461 | 1935 |
| 36 | [Intero Integrity](https://www.tamtam.ai/c/intero-integrity) (intero-integrity.com)<br>Provider of inspection, industrial, and environmental services for the energy industry, ensuring compliant and efficient operations with a turn-key mindset | Public Safety | 🇳🇱 Tricht | 443 | 1985 |
| 37 | [Besi Netherlands B.V.](https://www.tamtam.ai/c/besi-netherlands-b-v) (besi.com)<br>A product division of a publicly listed company, develops and manufactures semiconductor machines under the Fico brand, serving global chip manufacturers and suppliers | Semiconductor Manufacturing | 🇳🇱 Duiven | 419 |  |
| 38 | [Pompestichting](https://www.tamtam.ai/c/pompestichting) (pompestichting.nl)<br>The company provides treatment, care, and security to individuals involved with the justice system, focusing on crime prevention and safe reintegration into society | Mental Health Care | 🇳🇱 Nijmegen | 413 | 1966 |
| 39 | [De Heus Brasil Nutrição Animal](https://www.tamtam.ai/c/de-heus-brasil-nutricao-animal) (deheus.com.br)<br>A global family-owned company providing sustainable animal nutrition solutions to help producers worldwide progress in the agricultural sector | Farming | 🇳🇱 Ede | 401 | 1911 |
| 40 | [Leo Kannerhuis](https://www.tamtam.ai/c/leo-kannerhuis) (youz.nl)<br>Specialist treatment center for individuals with autism and psychiatric/behavioral issues, offering personalized and online care, research, and digital tools development | Mental Health Care | 🇳🇱 Arnhem | 381 | 1974 |
| 41 | [Arco - We are Arco, we make tables](https://www.tamtam.ai/c/arco-we-are-arco-we-make-tables) (arco.nl)<br>A family business designing and manufacturing tables, chairs, and furniture accessories with a focus on craftsmanship, innovation, and local materials | Furniture and Home Furnishings Manufacturing | 🇳🇱 Winterswijk | 368 |  |
| 42 | [Bredenoord](https://www.tamtam.ai/c/bredenoord) (bredenoord.com)<br>This company provides energy solutions to ensure successful entrepreneurship, especially in uncertain situations worldwide, enabling customers to operate guaranteed | Electric Power Generation | 🇳🇱 Apeldoorn | 359 | 1937 |
| 43 | [Itho Daalderop](https://www.tamtam.ai/c/itho-daalderop) (ithodaalderop.nl)<br>The company develops and manufactures innovative solutions for heating, hot water, ventilation, and control technology, aiming to create a healthy, comfortable, and energy-efficient indoor climate | Mechanical Or Industrial Engineering | 🇳🇱 Tiel | 335 | 1880 |
| 44 | [JBT Marel Meat](https://www.tamtam.ai/c/jbt-marel-meat) (jbtmarel.com)<br>Global leader in providing integrated systems and advanced processing equipment to the red meat industry, optimizing productivity and enhancing meat product quality worldwide | Machinery Manufacturing | 🇳🇱 Lichtenvoorde | 332 | 1983 |
| 45 | [Aeres](https://www.tamtam.ai/c/aeres) (aeres.nl)<br>A multifaceted institution in the green sector offering education, research, commercial activities, and international projects in sustainable learning and production | Education | 🇳🇱 Ede | 332 | 2004 |
| 46 | [Rappit](https://www.tamtam.ai/c/rappit) (rappit.io)<br>Expert in developing Enterprise Software modernization solutions on Google Cloud Platform and Java technologies, specializing in manufacturing, supply chain, logistics, retail industries | Software Development | 🇳🇱 Putten | 328 | 2009 |
| 47 | [Linthorst](https://www.tamtam.ai/c/linthorst) (linthorst.world)<br>One of the largest total installers in the Netherlands, specializing in technical solutions for the built environment and industry through close collaboration and a focus on long-term relationships | Construction | 🇳🇱 Apeldoorn | 326 | 1978 |
| 48 | [Wageningen Food Safety Research](https://www.tamtam.ai/c/wageningen-food-safety-research) (wur.nl)<br>Specialized in food safety research, this institute advises governments, conducts independent analysis, and serves as a reference laboratory for various substances | Research Services | 🇳🇱 Wageningen | 326 | 1975 |
| 49 | [Cyclomedia](https://www.tamtam.ai/c/cyclomedia) (cyclomedia.com)<br>Transforms real world data into valuable insights with 360° street-level visualizations and AI-powered analytics for smarter decision-making in urban environments and corporate sectors | Data Infrastructure and Analytics | 🇳🇱 Zaltbommel (NL) | 314 | 1980 |
| 50 | [NEDCON](https://www.tamtam.ai/c/nedcon) (nedcon.com)<br>A global leader in storage systems, specializing in complex and automated warehouse layouts with in-house development and a commitment to exceeding expectations | Transportation, Logistics, Supply Chain and Storage | 🇳🇱 Doetinchem | 307 | 1969 |

## 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 13, 2026.

## More company lists in Gelderland

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- [Multinational companies in Gelderland](https://www.tamtam.ai/l/multinational-companies-gelderland) (194)
- [Manufacturers in Gelderland](https://www.tamtam.ai/l/manufacturers-gelderland) (105)
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- [Hotel and hospitality groups in Gelderland](https://www.tamtam.ai/l/hospitality-groups-gelderland) (42)
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## The same list elsewhere in Netherlands

- [Companies with in-house R&D in the Netherlands](https://www.tamtam.ai/l/r-and-d-companies-netherlands) (738)
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- [Companies with in-house R&D in Eindhoven](https://www.tamtam.ai/l/r-and-d-companies-eindhoven) (29)
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- [Companies with in-house R&D in Utrecht](https://www.tamtam.ai/l/r-and-d-companies-utrecht) (26)

## 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) (34,334)
- [Companies with in-house R&D in Europe](https://www.tamtam.ai/l/r-and-d-companies-in-europe) (20,166)

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Source: https://www.tamtam.ai/l/r-and-d-companies-gelderland