# List of companies with in-house R&D in South Holland

Tamtam tracks 140 companies with in-house R&D headquartered in South Holland. This list ranks the 50 largest by number of employees on LinkedIn, led by Wolters Kluwer, Erasmus MC and Rijkswaterstaat. Their median headcount is 1,474. Half of them were founded in 1959 or later. The most common headquarters are Rotterdam (13), The Hague (8) and Delft (4).

These large organizations in South Holland are notable for their in-house R&D capabilities, spanning diverse sectors. Examples include Wolters Kluwer, a global leader in professional information and software, and Erasmus MC, a university medical center focused on advanced healthcare and research. Damen is a maritime company providing innovative shipbuilding solutions, while Mammoet offers global lifting and transport engineering services. TNO is an independent organization specializing in applied research.

A significant concentration of these R&D-focused entities is found in The Hague, which hosts numerous government administration bodies like Rijkswaterstaat and Centraal Bureau voor de Statistiek, as well as educational institutions and healthcare providers. Rotterdam also features prominently, with companies such as IMCD Group in chemical manufacturing and Rotterdam University of Applied Sciences.

🇳🇱 South Holland · 50 companies · Updated Nov 15, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Wolters Kluwer](https://www.tamtam.ai/c/wolters-kluwer) (wolterskluwer.com)<br>Global leader in professional information and software solutions across healthcare, tax, finance, legal, and corporate sectors, serving customers worldwide | Software Development | 🇳🇱 Alphen aan den Rijn | 22,177 | 1836 |
| 2 | [Erasmus MC](https://www.tamtam.ai/c/erasmus-mc) (erasmusmc.nl)<br>Leading university medical center providing advanced healthcare, cutting-edge research, and high-quality education focused on complex and rare medical conditions. | Hospitals and Health Care | 🇳🇱 Rotterdam | 14,228 | 2002 |
| 3 | [Rijkswaterstaat](https://www.tamtam.ai/c/rijkswaterstaat) (rijkswaterstaat.nl)<br>Rijkswaterstaat is responsible for managing and developing roads, waterways, and water resources to create a sustainable living environment in the Netherlands | Government Administration | 🇳🇱 The Hague | 12,088 | 1894 |
| 4 | [Leiden University Medical Center](https://www.tamtam.ai/c/leiden-university-medical-center) (lumc.nl)<br>A medical center focused on improving patient care through scientific research, providing specialized treatments, and serving as a referral center for complex medical questions | Hospitals and Health Care | 🇳🇱 Leiden | 8,812 |  |
| 5 | [Parnassia Groep](https://www.tamtam.ai/c/parnassia-groep) (parnassiagroep.nl)<br>A healthcare group with 8,000 employees providing mental health services in three core regions, offering comprehensive care tailored to individual needs | Mental Health Care | 🇳🇱 The Hague | 8,302 | 2007 |
| 6 | [Damen](https://www.tamtam.ai/c/damen) (damen.com)<br>This maritime company provides innovative solutions for trade, energy, and recreation, focusing on sustainability, efficiency, and collaboration to benefit future generations globally | Shipbuilding | 🇳🇱 Gorinchem | 6,070 |  |
| 7 | [TNO](https://www.tamtam.ai/c/tno) (tno.nl)<br>An independent organization specializing in applied research, connecting people and knowledge to drive innovations for industry competitiveness and societal well-being sustainably | Research Services | 🇳🇱 2595 DA The Hague | 5,866 | 1932 |
| 8 | [Mammoet](https://www.tamtam.ai/c/mammoet) (mammoet.com)<br>Global company offering lifting, transporting, installing, and decommissioning solutions for a wide range of projects with a focus on efficiency and safety | Engineering Services | 🇳🇱 Schiedam | 5,183 | 1807 |
| 9 | [Rotterdam University of Applied Sciences](https://www.tamtam.ai/c/rotterdam-university-of-applied-sciences) (hogeschoolrotterdam.nl)<br>Higher professional education institution with 30,000 students, combining practical experience and knowledge to prepare for future careers. | Higher Education | 🇳🇱 Rotterdam | 5,163 | 1988 |
| 10 | [IMCD Group](https://www.tamtam.ai/c/imcd-group) (imcdgroup.com)<br>Global leader in distributing and formulating specialty chemicals and ingredients across various industries, collaborating with partners to provide innovative solutions worldwide | Chemical Manufacturing | 🇳🇱 Rotterdam | 4,057 | 1995 |
| 11 | [De Haagse Hogeschool / The Hague University of Applied Sciences](https://www.tamtam.ai/c/de-haagse-hogeschool-the-hague-university-of-applied-sciences) (dehaagsehogeschool.nl)<br>Higher education institution offering a variety of programmes to over 20,000 students from 140+ countries, prioritizing inclusion, sustainability, and internationality | Higher Education | 🇳🇱 The Hague | 3,564 | 1987 |
| 12 | [Haaglanden Medisch Centrum (HMC)](https://www.tamtam.ai/c/haaglanden-medisch-centrum-hmc) (haaglandenmc.nl)<br>A leading hospital in The Hague region, providing specialized care across three locations with a focus on oncology, elderly care, and trauma services | Hospitals and Health Care | 🇳🇱 The Hague | 3,038 | 1873 |
| 13 | [Inter IKEA Group](https://www.tamtam.ai/c/inter-ikea-group) (ikea.com)<br>A diverse group of individuals passionate about home furnishing, working together to create a better everyday life for many people worldwide | Furniture and Home Furnishings Manufacturing | 🇳🇱 Delft | 2,938 | 1989 |
| 14 | [Lely](https://www.tamtam.ai/c/lely) (lely.com)<br>Providing innovative solutions and tailored services for dairy farms, including milking, cleaning, and farm management advice since 1948. | Machinery Manufacturing | 🇳🇱 Maassluis | 2,859 | 1948 |
| 15 | [Centraal Bureau voor de Statistiek](https://www.tamtam.ai/c/centraal-bureau-voor-de-statistiek) (cbs.nl)<br>A data collection and processing agency that publishes statistics for practical use, policymaking, and research, covering various societal aspects | Government Administration | 🇳🇱 The Hague | 2,786 | 1899 |
| 16 | [ICT Group](https://www.tamtam.ai/c/ict-group) (ict.eu)<br>Leading European provider industrial technology solutions. Delivers consultancy, software development, project solutions, managed services across vital sectors: automotive, high tech, industry, infrastructure, logistics, public mobility and safety. | IT Services and IT Consulting | 🇳🇱 Barendrecht | 2,462 |  |
| 17 | [Caldic](https://www.tamtam.ai/c/caldic) (caldic.com)<br>The company provides innovative and sustainable solutions in life science and material science markets, with a focus on food, pharma, personal care, and industrial formulations | Chemical Manufacturing | 🇳🇱 Rotterdam | 2,189 |  |
| 18 | [Reinier de Graaf ziekenhuis](https://www.tamtam.ai/c/reinier-de-graaf-ziekenhuis) (reinierdegraaf.nl)<br>With a history of providing healthcare for almost eight centuries, the company operates hospitals and expert centers, focusing on various medical specialties and patient demographics | Hospitals and Health Care | 🇳🇱 Delft | 2,144 | 1252 |
| 19 | [Aramco Overseas Company](https://www.tamtam.ai/c/aramco-overseas-company) (aramcooverseas.com)<br>A global energy and chemicals leader with European offices driving innovation, research, and safe energy delivery worldwide for over 60 years | Oil and Gas | 🇳🇱 The Hague | 2,137 | 1948 |
| 20 | [ARLANXEO](https://www.tamtam.ai/c/arlanxeo) (arlanxeo.com)<br>A global synthetic rubber company specializing in high-performance rubber for automotive, tire, construction, and oil & gas industries Owned by Saudi Aramco | Chemical Manufacturing | 🇳🇱 The Hague | 2,014 | 2016 |
| 21 | [GGZ Rivierduinen](https://www.tamtam.ai/c/ggz-rivierduinen) (rivierduinen.nl)<br>A large mental health organization in the Netherlands offering a range of services for adults, elderly, youth, and children, including clinical treatment and polyclinic help | Mental Health Care | 🇳🇱 Leiden | 1,972 | 2005 |
| 22 | [Rijk Zwaan](https://www.tamtam.ai/c/rijk-zwaan) (rijkzwaan.com)<br>A family-owned company developing and selling improved fruit and vegetable varieties globally, with a focus on innovation, research, and quality | Food and Beverage Manufacturing | 🇳🇱 De Lier | 1,933 | 1924 |
| 23 | [OMA](https://www.tamtam.ai/c/oma) (oma.com)<br>International architecture practice with a research and design studio, led by eight partners, known for innovative buildings worldwide, with offices in multiple cities | Architecture and Planning | 🇳🇱 Rotterdam | 1,905 | 1975 |
| 24 | [Hunter Douglas Europe](https://www.tamtam.ai/c/hunter-douglas-europe) (hunterdouglasgroup.com)<br>A global leader in window coverings and architectural products, focusing on innovative, high-quality solutions for homes and commercial buildings worldwide | Consumer Goods | 🇳🇱 Rotterdam | 1,785 | 1919 |
| 25 | [Rotterdam School of Management, Erasmus University](https://www.tamtam.ai/c/rotterdam-school-of-management-erasmus-university) (rsm.nl)<br>A top-ranked business school in Europe offering education and research to develop international business leaders with an innovative mindset for a sustainable future | Higher Education | 🇳🇱 Rotterdam | 1,474 | 1970 |
| 26 | [Hyva](https://www.tamtam.ai/c/hyva) (hyva.com)<br>Global provider of transport solutions for commercial vehicle and environmental industries, specializing in hydraulic loading systems, waste handling, and crane products Operates worldwide | Truck Transportation | 🇳🇱 Alphen aan den Rijn | 1,444 | 1979 |
| 27 | [Priva](https://www.tamtam.ai/c/priva) (priva.com)<br>This high-tech company develops climate control solutions for various sectors worldwide with a focus on sustainability, efficiency, and innovation | IT Services and IT Consulting | 🇳🇱 De Lier | 1,371 | 1959 |
| 28 | [Huisman](https://www.tamtam.ai/c/huisman) (huismanequipment.com)<br>Designs and manufactures heavy construction equipment for renewable energy, oil and gas, civil, naval, and entertainment industries, setting new industry standards since 1929 | Industrial Machinery Manufacturing | 🇳🇱 Schiedam | 1,280 | 1929 |
| 29 | [Fokker Technologies Holding B.V.](https://www.tamtam.ai/c/fokker-technologies-holding-b-v) (gknaerospace.com)<br>Design and manufacture of aerostructures, electrical wiring systems, landing gear, and aerospace services integrated within a global aerospace company. | Aviation and Aerospace Component Manufacturing | 🇳🇱 Papendrecht | 1,270 |  |
| 30 | [GGZ Delfland](https://www.tamtam.ai/c/ggz-delfland) (ggz-delfland.nl)<br>A longstanding mental health institution providing personalized care to individuals of all ages, offering a range of services across multiple locations | Mental Health Care | 🇳🇱 Delft | 1,211 | 1394 |
| 31 | [ORTEC](https://www.tamtam.ai/c/ortec) (ortec.com)<br>A global provider of decision-support software and data science solutions for organizations to improve business results and make a positive impact | Software Development | 🇳🇱 Zoetermeer | 1,046 | 1981 |
| 32 | [Koppert](https://www.tamtam.ai/c/koppert) (koppert.com)<br>Providing natural pest control, pollination, and biostimulant products to improve crop health, resilience, and sustainable farming worldwide. | Farming | 🇳🇱 Berkel en Rodenrijs | 1,004 | 1967 |
| 33 | [Pharming Group](https://www.tamtam.ai/c/pharming-group) (pharming.com)<br>Develops and commercializes innovative medicines including small molecules and biologics for patients living with rare, debilitating, and life-threatening diseases globally. | Biotechnology Research | 🇳🇱 Leiden | 865 | 1988 |
| 34 | [Dümmen Orange](https://www.tamtam.ai/c/dummen-orange) (latam.dummenorange.com)<br>Global leader in breeding and propagating flowers and plants, offering patented varieties to growers worldwide with a century-long legacy and innovative R&D Employing 6,600 people globally | Farming | 🇳🇱 De Lier | 773 |  |
| 35 | [Netherlands Forensic Institute NFI](https://www.tamtam.ai/c/netherlands-forensic-institute-nfi) (forensischinstituut.nl)<br>providing reliable forensic information and products to support national and international organizations in peace, justice, and safety efforts | Research Services | 🇳🇱 The Hague | 758 | 1999 |
| 36 | [LINET](https://www.tamtam.ai/c/linet) (linet.com)<br>A global leader in advanced care beds manufacturing, providing innovative solutions designed by nurses, with a focus on quality, lifetime value, and customer trust | Medical Equipment Manufacturing | 🇳🇱 Dordrecht | 695 | 1990 |
| 37 | [AnywhereNow](https://www.tamtam.ai/c/anywherenow) (anywhere.now)<br>Offers a Microsoft Teams-native Dialogue Management solution to streamline contact center operations, enhance customer experience, and boost productivity through AI and efficient collaboration. | Software Development | 🇳🇱 Rotterdam | 569 |  |
| 38 | [VPS](https://www.tamtam.ai/c/vps) (vpsveritas.com)<br>A global leader in maritime decarbonisation advisory services, providing innovative testing and inspection solutions to optimize performance while reducing environmental impact | Professional Services | 🇳🇱 Rotterdam | 561 |  |
| 39 | [KONI](https://www.tamtam.ai/c/koni) (koni.com)<br>This company revolutionized the suspension industry with adjustable hydraulic shock absorbers, offering comfort, safety, and innovation for all vehicles | Motor Vehicle Manufacturing | 🇳🇱 Oud-Beijerland | 556 | 1857 |
| 40 | [Provimi](https://www.tamtam.ai/c/provimi) (cargill.com)<br>Specializing in feed solutions for various species with innovative research, technical knowledge, and customized options, backed by global network and expertise in animal nutrition | Farming | 🇳🇱 Rotterdam | 554 | 1927 |
| 41 | [Royal Van Lent Shipyard](https://www.tamtam.ai/c/royal-van-lent-shipyard) (werkenbijfeadship.nl)<br>A historic yacht construction company specializing in custom-built motoryachts, with highly skilled craftsmen, premium facilities, and a focus on maintaining personal relationships with owners | Shipbuilding | 🇳🇱 Kaag | 552 | 1849 |
| 42 | [Sint Franciscus Gasthuis](https://www.tamtam.ai/c/sint-franciscus-gasthuis) (franciscus.nl)<br>A leading hospital in Rotterdam providing multidisciplinary care, specialized treatment, and collaboration with regional healthcare providers, focusing on patient-centered services | Hospitals and Health Care | 🇳🇱 Rotterdam | 535 | 1892 |
| 43 | [IHE Delft Institute for Water Education](https://www.tamtam.ai/c/ihe-delft-institute-for-water-education) (un-ihe.org)<br>Global graduate water education and training provider based in the Netherlands, focused on sustainable water management and capacity building for global development | Higher Education | 🇳🇱 Delft | 478 | 1957 |
| 44 | [DORC Dutch Ophthalmic Research Center (International)](https://www.tamtam.ai/c/dorc-dutch-ophthalmic-research-center-international) (dorcglobal.com)<br>Supplier of advanced equipment, instruments, and liquids for ophthalmic surgery, enhancing surgical precision and improving global eye care. | Medical Equipment Manufacturing | 🇳🇱 Zuidland | 471 | 1983 |
| 45 | [Quooker](https://www.tamtam.ai/c/quooker) (quooker.com)<br>Innovative company specializing in developing and producing cutting-edge boiling water taps for modern kitchens, with a focus on efficiency and design | Manufacturing | 🇳🇱 Ridderkerk | 469 | 1970 |
| 46 | [Het Oogziekenhuis Rotterdam](https://www.tamtam.ai/c/het-oogziekenhuis-rotterdam) (oogziekenhuis.nl)<br>A leading eye care specialist in the Netherlands, prioritizing patient safety, innovation, and high-quality treatments in a comforting environment | Hospitals and Health Care | 🇳🇱 Rotterdam | 468 | 1874 |
| 47 | [RH Marine](https://www.tamtam.ai/c/rh-marine) (rhmarine.com)<br>RH Marine is a leading system integrator providing tailored electrical and automation solutions for Defence, Safety & Security ships and Yachts since 1860 | Shipbuilding | 🇳🇱 Schiedam | 457 | 1860 |
| 48 | [Stokvis Tapes Group](https://www.tamtam.ai/c/stokvis-tapes-group) (stokvistapes.com)<br>Innovative partner in adhesive solutions, offering custom products for various industries with global presence and expertise in tape manufacturing | Plastics Manufacturing | 🇳🇱 Alblasserdam | 453 | 1956 |
| 49 | [Centre for Human Drug Research](https://www.tamtam.ai/c/centre-for-human-drug-research) (chdr.nl)<br>A Dutch CRO specializing in data-intensive early phase clinical studies, prioritizing subjects' safety and comfort while supporting medical education | Research Services | 🇳🇱 Leiden | 403 | 1987 |
| 50 | [Ortec Finance](https://www.tamtam.ai/c/ortec-finance) (ortecfinance.com)<br>Provides advanced software models and technology for investment decision making, risk management, and financial planning to global financial institutions. | IT Services and IT Consulting | 🇳🇱 Rotterdam | 399 | 1981 |

## 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 15, 2026.

## More company lists in South Holland

- [The largest companies in South Holland](https://www.tamtam.ai/l/largest-companies-south-holland) (2,508)
- [Multinational companies in South Holland](https://www.tamtam.ai/l/multinational-companies-south-holland) (559)
- [Transportation, Logistics, Supply Chain and Storage companies in South Holland](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-south-holland) (276)
- [Logistics companies in South Holland](https://www.tamtam.ai/l/logistics-companies-south-holland) (263)
- [Retail chains in South Holland](https://www.tamtam.ai/l/retail-chains-south-holland) (188)
- [Critical infrastructure operators in South Holland](https://www.tamtam.ai/l/critical-infrastructure-operators-south-holland) (152)
- [Truck Transportation companies in South Holland](https://www.tamtam.ai/l/truck-transportation-companies-south-holland) (145)
- [Professional services firms in South Holland](https://www.tamtam.ai/l/professional-services-firms-south-holland) (145)
- [Software Development companies in South Holland](https://www.tamtam.ai/l/software-development-companies-south-holland) (142)
- [SaaS companies in South Holland](https://www.tamtam.ai/l/saas-companies-south-holland) (137)
- [Manufacturers in South Holland](https://www.tamtam.ai/l/manufacturers-south-holland) (134)
- [Family-owned companies in South Holland](https://www.tamtam.ai/l/family-owned-companies-south-holland) (128)
- [Healthcare providers in South Holland](https://www.tamtam.ai/l/healthcare-providers-south-holland) (124)
- [IT Services and IT Consulting companies in South Holland](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-south-holland) (121)
- [Financial services firms in South Holland](https://www.tamtam.ai/l/financial-services-firms-south-holland) (120)
- [Education providers in South Holland](https://www.tamtam.ai/l/education-companies-south-holland) (111)
- [Hospitals and Health Care companies in South Holland](https://www.tamtam.ai/l/hospitals-and-health-care-companies-south-holland) (109)
- [Financial Services companies in South Holland](https://www.tamtam.ai/l/financial-services-companies-south-holland) (107)
- [Consulting firms in South Holland](https://www.tamtam.ai/l/consulting-firms-south-holland) (106)
- [Distributors and wholesalers in South Holland](https://www.tamtam.ai/l/distributors-and-wholesalers-south-holland) (96)
- [IT services companies in South Holland](https://www.tamtam.ai/l/it-services-companies-south-holland) (93)
- [Hardware manufacturers in South Holland](https://www.tamtam.ai/l/hardware-companies-south-holland) (86)
- [Hotel and hospitality groups in South Holland](https://www.tamtam.ai/l/hospitality-groups-south-holland) (86)
- [Public sector organisations in South Holland](https://www.tamtam.ai/l/public-sector-organisations-south-holland) (82)

## 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)
- [Companies with in-house R&D in North Holland](https://www.tamtam.ai/l/r-and-d-companies-north-holland) (188)
- [Companies with in-house R&D in Gelderland](https://www.tamtam.ai/l/r-and-d-companies-gelderland) (101)
- [Companies with in-house R&D in North Brabant](https://www.tamtam.ai/l/r-and-d-companies-north-brabant) (97)
- [Companies with in-house R&D in Overijssel](https://www.tamtam.ai/l/r-and-d-companies-overijssel) (41)
- [Companies with in-house R&D in Limburg](https://www.tamtam.ai/l/r-and-d-companies-limburg) (29)
- [Companies with in-house R&D in Amsterdam](https://www.tamtam.ai/l/r-and-d-companies-amsterdam) (129)
- [Companies with in-house R&D in Eindhoven](https://www.tamtam.ai/l/r-and-d-companies-eindhoven) (29)
- [Companies with in-house R&D in Rotterdam](https://www.tamtam.ai/l/r-and-d-companies-rotterdam) (26)
- [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) (34,336)
- [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-south-holland