# 33 leading research institutes in South Holland

Tamtam tracks 33 research institutes headquartered in South Holland. This list ranks all of them by number of employees on LinkedIn, led by Erasmus MC, Delft University of Technology and Leiden University Medical Center. Their median headcount is 478. Half of them were founded in 1945 or later. The most common headquarters are The Hague (10), Delft (9) and Rotterdam (8).

The research institutes in Zuid-Holland are primarily large organizations focused on higher education, medical care, and applied research. They represent significant employers in the region. Erasmus MC, for instance, is a leading university medical center, while Delft University of Technology focuses on technological development. Leiden University Medical Center improves patient care through scientific research, and TNO specializes in applied research for industry and society. Leiden University offers diverse academic programs, and Erasmus University Rotterdam specializes in economics, medicine, law, and culture.

A notable pattern among these institutions is their strong concentration in a few key cities. Rotterdam, Delft, Leiden, and The Hague host the majority of these large research and educational organizations. This suggests a regional clustering of knowledge and innovation, with a mix of public and semi-public entities contributing to various sectors, from healthcare to government administration, as seen with the Centraal Bureau voor de Statistiek.

🇳🇱 South Holland · 33 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [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 |
| 2 | [Delft University of Technology](https://www.tamtam.ai/c/delft-university-of-technology) (tudelft.nl)<br>Top European university focused on technological development and research for a better society, with key areas including health, energy, environment, and infrastructure | Research Services | 🇳🇱 Delft | 10,093 | 1842 |
| 3 | [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 |  |
| 4 | [Leiden University](https://www.tamtam.ai/c/leiden-university) (universiteitleiden.nl)<br>Offers diverse bachelor's and master's programs, renowned for academic excellence, preparing students for global employment opportunities. | Higher Education | 🇳🇱 Leiden | 8,420 |  |
| 5 | [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 |
| 6 | [Erasmus University Rotterdam](https://www.tamtam.ai/c/erasmus-university-rotterdam) (eur.nl)<br>University specializing in economics, medicine, law, and culture, offering education, research, and career development opportunities in Rotterdam. | Higher Education | 🇳🇱 Rotterdam | 4,008 | 1913 |
| 7 | [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 |
| 8 | [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 |
| 9 | [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 |
| 10 | [Deltares](https://www.tamtam.ai/c/deltares) (deltares.nl)<br>An independent research institute specializing in water and subsurface solutions for deltas, coastal regions, and river basins, collaborating with various stakeholders worldwide | Research Services | 🇳🇱 Delft | 1,115 | 2008 |
| 11 | [NWO (Dutch Research Council)](https://www.tamtam.ai/c/nwo-dutch-research-council) (nwo.nl)<br>Leading science-funding body in the Netherlands investing in research projects, promoting collaboration, innovation, and knowledge utilization in various disciplines | Research Services | 🇳🇱 The Hague | 1,052 |  |
| 12 | [ZonMw](https://www.tamtam.ai/c/zonmw) (zonmw.nl)<br>ZonMw funds research and innovation in health, care, and welfare to promote good health for all by advancing knowledge and identifying research needs | Research Services | 🇳🇱 The Hague | 962 | 2001 |
| 13 | [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 |
| 14 | [Naturalis Biodiversity Center](https://www.tamtam.ai/c/naturalis-biodiversity-center) (naturalis.nl)<br>The company is dedicated to recording all life on Earth, researching nature to preserve biodiversity, and contributing to solutions for global issues | Museums, Historical Sites, and Zoos | 🇳🇱 Leiden | 690 | 1820 |
| 15 | [KB nationale bibliotheek](https://www.tamtam.ai/c/kb-nationale-bibliotheek) (kb.nl)<br>National library of the Netherlands advancing intellectual development, creativity, and collaboration with public libraries, cultural heritage, and academics for enhanced access to Dutch Library Collection | Libraries | 🇳🇱 The Hague | 657 | 1798 |
| 16 | [Erasmus School of Economics](https://www.tamtam.ai/c/erasmus-school-of-economics) (eur.nl)<br>An internationally renowned school of economics offering top-level programs, conducting cutting-edge research, and promoting knowledge transfer to society | Higher Education | 🇳🇱 Rotterdam | 610 | 1913 |
| 17 | [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 |
| 18 | [TU Delft \| Aerospace Engineering](https://www.tamtam.ai/c/tu-delft-aerospace-engineering) (tudelft.nl)<br>Largest aerospace faculty globally. Focuses on modern teaching, high-profile research, and pioneering innovations in aerospace and wind energy. | Higher Education | 🇳🇱 Delft | 401 |  |
| 19 | [TU Delft \| Civil Engineering and Geosciences](https://www.tamtam.ai/c/tu-delft-civil-engineering-and-geosciences) (tudelft.nl)<br>The company is a research institution in the Netherlands focusing on engineering solutions for societal challenges related to climate change and urbanization | Research Services | 🇳🇱 Delft | 384 | 1842 |
| 20 | [Leiden University - Faculty of Governance and Global Affairs](https://www.tamtam.ai/c/leiden-university-faculty-of-governance-and-global-affairs) (universiteitleiden.nl)<br>The Faculty of Governance and Global Affairs at Leiden University provides interdisciplinary research and education on political, administrative, and international law issues | Higher Education | 🇳🇱 The Hague | 375 |  |
| 21 | [Faculty of Architecture and the Built Environment, TU Delft](https://www.tamtam.ai/c/faculty-of-architecture-and-the-built-environment-tu-delft) (tudelft.nl)<br>The Faculty of Architecture and the Built Environment at TU Delft is a renowned platform for innovation in architecture education and research internationally | Architecture and Planning | 🇳🇱 Delft | 374 | 1904 |
| 22 | [Erasmus School of Law](https://www.tamtam.ai/c/erasmus-school-of-law) (eur.nl)<br>Erasmus School of Law in Rotterdam offers bachelor and master programs, postgraduate courses, and conducts research in collaboration with academia and industry | Higher Education | 🇳🇱 Rotterdam | 346 | 1963 |
| 23 | [PBL Planbureau voor de Leefomgeving](https://www.tamtam.ai/c/pbl-planbureau-voor-de-leefomgeving) (pbl.nl)<br>The company conducts strategic policy analysis on environment, nature, and spatial planning to improve decision-making through studies and evaluations | Research Services | 🇳🇱 The Hague | 343 | 2008 |
| 24 | [TU Delft \| Mechanical Engineering](https://www.tamtam.ai/c/tu-delft-mechanical-engineering) (tudelft.nl)<br>The faculty of Mechanical Engineering at Delft University of Technology conducts pioneering research and provides outstanding education in innovative, high-tech facilities | Research Services | 🇳🇱 Delft | 312 | 1842 |
| 25 | [SRON Space Research Organisation Netherlands](https://www.tamtam.ai/c/sron-space-research-organisation-netherlands) (sron.nl)<br>A Dutch institute specializing in space research, developing technology for astrophysical, planetary, and climate studies, as well as creating sensors for X-rays and infrared radiation | Research Services | 🇳🇱 Leiden | 274 | 1961 |
| 26 | [QuTech](https://www.tamtam.ai/c/qutech) (qutech.nl)<br>Innovative company focused on developing quantum computing technology and a secure quantum internet based on quantum mechanics principles | Nanotechnology Research | 🇳🇱 Delft | 223 | 2014 |
| 27 | [CPB Netherlands Bureau for Economic Policy Analysis](https://www.tamtam.ai/c/cpb-netherlands-bureau-for-economic-policy-analysis) (cpb.nl)<br>Conducts scientific research to inform economic decision-making for politicians and policymakers, either proactively or upon request from various stakeholders | Government Administration | 🇳🇱 The Hague | 195 | 1945 |
| 28 | [RKD - Nederlands Instituut voor Kunstgeschiedenis](https://www.tamtam.ai/c/rkd-nederlands-instituut-voor-kunstgeschiedenis) (rkd.nl)<br>The institute manages a collection of materials on Western art from the late Middle Ages to present, essential for art historians and art enthusiasts | Museums, Historical Sites, and Zoos | 🇳🇱 The Hague | 102 | 1932 |
| 29 | [Leiden Institute of Physics](https://www.tamtam.ai/c/leiden-institute-of-physics) (leidenuniv.nl)<br>Leading physics institute specializing in research in Quantum & Optics, Theoretical Physics, and Biological & Soft Matter at Leiden University in The Netherlands | Research Services | 🇳🇱 Leiden | 31 | 1893 |
| 30 | [Kenniscentrum Zorginnovatie](https://www.tamtam.ai/c/kenniscentrum-zorginnovatie) (hogeschoolrotterdam.nl)<br>Conducting practice-oriented research to improve healthcare and support, collaborating with professionals, clients, and educational institutions to enhance health and well-being | Research Services | 🇳🇱 Rotterdam | 20 |  |
| 31 | [institute for Medical Technology Assessment (iMTA \| Erasmus University)](https://www.tamtam.ai/c/institute-for-medical-technology-assessment-imta-erasmus-university) (imta.nl)<br>A university-based institute specializing in medical technology assessment, health economics, and health outcomes research for over 30 years | Research Services | 🇳🇱 Rotterdam | 17 | 1988 |
| 32 | [Convergence Health & Technology](https://www.tamtam.ai/c/convergence-health-and-technology) (convergence.nl)<br>The company integrates medical, engineering, and social sciences to create a sustainable healthcare ecosystem with cutting-edge technologies and personalized health interventions | Hospitals and Health Care | 🇳🇱 Rotterdam | 5 |  |
| 33 | [TU Delft Health](https://www.tamtam.ai/c/tu-delft-health) (tudelft.nl)<br>Bringing together researchers to focus on health research and innovation, contributing to pioneering health technologies within relevant research programs | Research Services | 🇳🇱 Delft | 2 |  |

## 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 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)
- [Companies with in-house R&D in South Holland](https://www.tamtam.ai/l/r-and-d-companies-south-holland) (140)
- [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)

## The same list elsewhere in Netherlands

- [Research institutes in the Netherlands](https://www.tamtam.ai/l/research-institutes-netherlands) (102)
- [Research institutes in North Holland](https://www.tamtam.ai/l/research-institutes-north-holland) (25)

## The same list elsewhere

- [Research institutes in the world](https://www.tamtam.ai/l/research-institutes-in-the-world) (5,686)
- [Research institutes in Europe](https://www.tamtam.ai/l/research-institutes-in-europe) (2,713)

---

Source: https://www.tamtam.ai/l/research-institutes-south-holland