| # | Company | Employees |
|---|---|---|
| 1 |
NN Groupnn-group.com
Provides retirement services, pensions, insurance, banking, and investments to approximately 18 million customers across 10 countries, including Europe and Japan. |
24,125 |
| 2 | 17,917 | |
| 3 | 14,284 | |
| 4 |
Erasmus MCerasmusmc.nl
Leading university medical center providing advanced healthcare, cutting-edge research, and high-quality education focused on complex and rare medical conditions. |
14,228 |
| 5 |
Rijkswaterstaatrijkswaterstaat.nl
Rijkswaterstaat is responsible for managing and developing roads, waterways, and water resources to create a sustainable living environment in the Netherlands |
12,088 |
| 6 |
NNnn-group.com
An international financial services company with a strong presence in 11 countries, specializing in various financial products and services for over 175 years |
10,970 |
| 7 |
Nationale-Nederlandennn.nl
Provides retirement services, pensions, insurance, banking, and investments to approximately 18 million customers across 10 countries, with a rich 175-year history. |
10,847 |
| 8 |
APM Terminalsapmterminals.com
Operating a global network of over 60 terminals, providing safe, efficient, and innovative port services to support sustainable supply chains. |
9,747 |
| 9 |
Leiden University Medical Centerlumc.nl
A medical center focused on improving patient care through scientific research, providing specialized treatments, and serving as a referral center for complex medical questions |
8,812 |
| 10 |
Parnassia Groepparnassiagroep.nl
A healthcare group with 8,000 employees providing mental health services in three core regions, offering comprehensive care tailored to individual needs |
8,302 |
| 11 | 6,563 | |
| 12 |
Stedinstedin.net
Providing reliable energy through networks, transitioning to clean energy sources for a sustainable future, and fostering collaboration for a world full of new energy |
5,578 |
| 13 | 4,169 | |
| 14 | 3,462 | |
| 15 | 3,291 | |
| 16 |
HagaZiekenhuishagaziekenhuis.nl
A leading top clinical teaching hospital in the Haaglanden region, offering excellent basic care, specialized services, and supporting scientific research |
3,244 |
| 17 |
Haaglanden Medisch Centrum (HMC)haaglandenmc.nl
A leading hospital in The Hague region, providing specialized care across three locations with a focus on oncology, elderly care, and trauma services |
3,038 |
| 18 |
Ipse de Bruggenipsedebruggen.nl
Providing opportunities, support, and care for individuals with mental and/or multiple handicaps, ensuring lifelong development and community participation |
3,003 |
| 19 |
Laurenslaurens.nl
A care organization in Rotterdam providing home care, rehabilitation, nursing home care, end-of-life care, and independent housing for seniors |
3,001 |
| 20 |
Maasstad Ziekenhuismaasstadziekenhuis.nl
Large general hospital in Rotterdam providing expert medical care, specialized burn treatment, oncology, and intensive care services to improve patient quality of life. |
2,866 |
| 21 |
RETwerkenbijderet.nl
Public transport provider in Rotterdam offering metro, light rail, tram, bus, and ferry services to over 600,000 daily passengers, responsible for operations and infrastructure maintenance |
2,772 |
| 22 |
Franciscusfranciscus.nl
Top Clinical Teaching Hospital providing care for over 100 years with a focus on exceeding patient expectations and creating a welcoming environment |
2,712 |
| 23 |
Albert Schweitzer ziekenhuisasz.nl
A top clinical teaching hospital providing high-quality inpatient and outpatient care with a team of 250 specialists, 3000 employees, and 400 volunteers |
2,453 |
| 24 |
DELTA Fiberdeltafiber.nl
Provides broadband, television, and telephony services to consumers and businesses in the Netherlands under DELTA and Caiway brands. |
2,398 |
| 25 |
Odido Nederlandodido.nl
Odido is a telecom provider focused on making technology accessible, inclusive, and sustainable, offering mobile, fiber, and TV services with a human touch |
2,360 |
| 26 |
Affideaaffidea.com
A pan-European provider of diagnostic imaging and healthcare services with a focus on patient safety and high-quality medical care |
2,327 |
| 27 | 2,281 | |
| 28 |
Reinier de Graaf ziekenhuisreinierdegraaf.nl
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 |
2,144 |
| 29 |
Rivas Zorggroeprivas.nl
Rivas provides high-quality and continuous healthcare services in multiple regions, focusing on personalized care and promoting health and well-being for clients |
2,140 |
| 30 |
Aramco Overseas Companyaramcooverseas.com
A global energy and chemicals leader with European offices driving innovation, research, and safe energy delivery worldwide for over 60 years |
2,137 |
| 31 |
GGZ Rivierduinenrivierduinen.nl
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 |
1,972 |
| 32 |
Lelie zorggroepleliezorggroep.nl
A group offering care and support in the Netherlands through various organizations focusing on healthcare, mental health, and elderly care with a Christian ethos |
1,947 |
| 33 |
Florenceflorence.nl
Provides diverse healthcare services including home care, residential care, youth health, and advice in the Den Haag region, with dedicated staff and volunteers. |
1,944 |
| 34 |
ECT Rotterdam (Europe Container Terminals)ect.nl
A leading container terminal operator in Europe, offering efficient connections and extended inland terminal network with high-frequency rail and inland shipping services |
1,930 |
| 35 |
Antesanteszorg.nl
We provide (highly) specialized mental health care to clients of all ages, focusing on recovery and improvement with the support of loved ones and colleagues |
1,780 |
| 36 |
Alrijnealrijne.nl
Providing the best healthcare with personal attention, empowering patients to take control of their health, in collaboration with medical professionals |
1,709 |
| 37 | 1,675 | |
| 38 |
Zilveren Kruiszilverenkruis.nl
providing affordable, high-quality healthcare access and advising employers on promoting healthy, productive work environments to reduce costs |
1,598 |
| 39 |
Groene Hart Ziekenhuiswerkenbijghz.nl
A hospital in the Green Heart region offering high-quality care with a focus on patients, staff, and a supportive work environment |
1,567 |
| 40 |
Pieter van Foreestpietervanforeest.nl
Pieter van Foreest offers a wide range of care, treatment, and well-being services for elderly in the Delft region They prioritize personalized care and collaboration |
1,451 |
| 41 | 1,415 | |
| 42 |
IJsselland Ziekenhuisysl.nl
An general regional hospital in Capelle aan den IJssel with a focus on gastrointestinal care, serving the surrounding area since 1991 |
1,379 |
| 43 | 1,344 | |
| 44 |
HTM Personenvervoer N.V.htm.nl
A transportation company in the Hague region providing buses, trams, and group transport, serving over 130 million passengers annually for over 150 years |
1,301 |
| 45 |
Ikaziawerkenbijikazia.nl
A healthcare provider focused on personalized care, training new doctors, and offering services close to home through various outpatient clinics |
1,287 |
| 46 | 1,245 | |
| 47 | 1,236 | |
| 48 |
Veiligheidsregio Rotterdam-Rijnmondvr-rr.nl
A company ensuring safety in the region through ambulance care, fire brigade services, disaster response, crisis management, prevention, and collaboration with municipalities and police |
1,221 |
| 49 |
GGZ Delflandggz-delfland.nl
A longstanding mental health institution providing personalized care to individuals of all ages, offering a range of services across multiple locations |
1,211 |
| 50 |
WoonZorgcentra Haaglanden (WZH)wzh.nl
WZH offers personalized care and living options for people with dementia, somatic complaints, and other health conditions in the Haaglanden region |
1,201 |
| 51 |
Marentemarente.nl
Marente provides care and support to elderly and vulnerable individuals in the Duin- and Bollenstreek region, helping them live independently and offering rehabilitation services |
1,147 |
| 52 |
FMO - Dutch entrepreneurial development bankfmo.nl
Private sector investor in developing countries focusing on energy, agribusiness, and financial institutions to drive economic growth and fulfill sustainable development goals. |
1,129 |
| 53 |
Argos Zorggroepwerkenbijargoszorggroep.nl
Argos Zorggroep provides expert care and companionship to elderly individuals at home or in one of their eleven care homes They strive to create moments of happiness through attentive and compassionate support |
1,104 |
| 54 |
ActiViteactivite.nl
A professional and reliable care organization promoting self-reliance Providing tailored care services for all individuals, while valuing employees and collaborating with professionals |
1,053 |
| 55 |
Evides Waterbedrijfevides.nl
Evides Waterbedrijf ensures reliable drinking water supply, wastewater treatment, and tailored industrial water services in the Netherlands, Belgium, and Germany Dedicated to sustainability and innovation |
949 |
| 56 |
Hoogheemraadschap van Rijnlandrijnland.net
Responsible for water safety, quality, and supply management across a region including dikes, dunes, and water bodies for multiple uses. |
921 |
| 57 |
Samskipsamskip.com
European multimodal transport company providing environmentally friendly shortsea, road, rail, and inland waterway logistics with global refrigerated cargo expertise. |
918 |
| 58 |
Zuidwesterwerkenbijzuidwester.nl
This organization provides support for individuals with intellectual disabilities and acquired brain injuries, offering services such as housing, day programs, and meaningful employment |
875 |
| 59 | 842 | |
| 60 | 836 | |
| 61 |
Basaltbasaltrevalidatie.nl
"Expert in rehabilitation care, with 11 locations in South Holland North Specializing in helping individuals adjust to new situations and live independently" |
826 |
| 62 | 813 | |
| 63 | 805 | |
| 64 |
Hoogheemraadschap van Delflandhhdelfland.nl
Delfland is a Dutch water authority responsible for water defense, water management, and water quality in a densely populated and industrialized region |
797 |
| 65 |
Saffiersaffiergroep.nl
A innovative healthcare organization in The Hague, focusing on supporting elderly individuals to maintain their identity and autonomy, whether living at home or in one of their 9 locations |
781 |
| 66 |
Bank Nederlandse Gemeentenbngbank.nl
BNG Bank provides financial services tailored to governments and institutions for public interest, maintaining low costs for social services while ensuring high credit quality |
773 |
| 67 |
Alrijne Zorggroepalrijne.nl
Providing human-centered, safe, and affordable healthcare through efficient and transparent operations, with multiple hospital locations and care facilities in the region |
772 |
| 68 |
CuraMarecuramare.nl
The company provides accessible healthcare services including hospital care, elderly care, home care, maternity care, treatment, and rehabilitation in specific regions |
769 |
| 69 |
Broekman Logisticsbroekmanlogistics.com
Full-service logistics company offering forwarding, shipping, warehousing, distribution, and breakbulk terminal services with global reach and personal touch. |
759 |
| 70 |
Stichting Humanitas Rotterdamstichtinghumanitas.nl
An organization founded in 1959 promoting independence, positivity, and community through innovative care, housing, and social services for seniors and families |
756 |
| 71 |
Greenchoicegreenchoice.nl
Greenchoice provides 100% green energy and offset gas, encourages energy conservation and self-generation, and offers sustainable energy from sun, wind, water, and biomass |
753 |
| 72 |
Stolt Tankersstolttankers.com
Operating the world's largest fleet of chemical parcel tankers for seamless, global supply chain solutions with innovative transportation and storage options |
741 |
| 73 | 733 | |
| 74 |
Waterschap Hollandse Deltawshd.nl
This company in Zuid-Holland protects against water, manages surface water, purifies wastewater, maintains roads and contributes to sustainable living and working environments |
722 |
| 75 |
DSW Zorgverzekeraarwerkenbijdsw.nl
Providing accessible, affordable, and high-quality health insurance with strong customer relationships and self-developed digital service platforms. |
670 |
| 76 |
Veiligheidsregio Haaglandenvrh.nl
The company is one of the twenty-five safety regions in the Netherlands, focusing on increasing safety and preparedness for incidents through collaboration with various organizations |
642 |
| 77 | 621 | |
| 78 |
Nederlands Loodswezenloodswezen.nl
A maritime organization with registered pilots providing navigational guidance to ships, ensuring safe and efficient shipping movements while protecting the marine environment |
619 |
| 79 |
Het Van Weel-Bethesda Ziekenhuisvanweelbethesda.nl
A basis hospital with a specialized approach, referring patients to partners for advanced treatments, while providing a predominantly Protestant-Christian care environment |
593 |
| 80 |
Syndionsyndion.nl
The company provides support and services to people with disabilities, focusing on individual preferences and abilities for living, learning, working, and growing |
570 |
| 81 |
Anthony Vederanthonyveder.com
Specializing in gas transport, this company offers high-quality and flexible services for LPG, LNG, and petrochemical gases, pioneering innovative solutions in the maritime industry |
488 |
| 82 |
Veiligheidsregio Zuid Holland Zuidzhzveilig.nl
The company is a safety region in the Netherlands responsible for crisis management, disaster relief, firefighting, and medical assistance in coordination with various partners |
441 |
| 83 |
Aegon Nederlandasr.nl
Empowering individuals through life's milestones with pension, mortgage, and insurance products and services, now part of asr for expanded offerings Hiring customer-focused professionals |
439 |
| 84 |
Allianz Nederlandallianz.nl
Provides a wide range of insurance products including auto, life, income protection, and business pensions within the Benelux region. |
373 |
| 85 |
Stolt Tank Containersstolttankcontainers.com
Global leader in logistics and transportation services for bulk-liquid chemicals and food-grade products, offering specialized tank containers for various cargo types |
317 |
| 86 |
VT Groupvtgroup.nl
A maritime company offering logistic products, safe operations, fleet management, and bunkering services with a focus on sustainability and social responsibility |
314 |
| 87 |
ENGIE E&P
An international independent E&P company with operations in the North Sea, North Africa, and South East Asia, producing 154,000 net barrels of oil equivalent per day |
258 |
| 88 |
Nederlandse Waterschapsbank (NWB Bank)nwbbank.com
A bank specializing in public sector financing, focusing on water and sustainability Uses high ratings to attract funds for affordable, sustainable projects |
254 |
| 89 |
Pensioenfonds Horeca & Cateringphenc.nl
Pension fund serving employees and employers in hospitality and catering industries, managing over β¬146 billion in assets with a focus on sustainability |
203 |
| 90 |
Koninklijke PostNL B.V.postnl.nl
International shipping company, now operating as FedEx in the US Offering efficient and reliable delivery services with expanded capabilities |
186 |
| 91 |
C. Steinweg Nederlandsteinweg.com
This company provides a wide range of logistics services, from storage and transportation to handling and processing goods for clients worldwide |
186 |
| 92 |
UnivΓ© Zuid-Nederlandunive.nl
Providing insurance, independent advice, mortgage services, and banking as a cooperative, focusing on personalized and nearby service for members |
166 |
| 93 |
Pensioenfonds Metaal en Techniek ( PMT )pmt.nl
PMT is the largest pension fund in the Netherlands, serving over 14 million participants in various industries by providing pension services |
164 |
| 94 |
Onderlinge Nederlandonderlingenederland.nl
Specializing in secure pension and life insurance products with guaranteed capital, providing collective pension plans, DGA retirement solutions, and study insurance, recognized for customer-centric service |
138 |
| 95 |
QTerminals Kramer Rotterdamqterminals-kramerrotterdam.com
A container logistics company in Rotterdam offering services in storage, repair, maintenance, transshipment, and transport via rail, water, and road |
128 |
| 96 |
HM Grouphm-group.nl
HM Group provides specialized logistics services, including container transport, intermodal transport, special transport, stevedoring, warehousing, customs, and cross docking |
126 |
| 97 |
Rabobank Zuid-Hollandse Eilandenrabobank.nl
A local, customer-focused bank providing personal service and innovative products for businesses Connect with employees and stay updated on activities |
112 |
| 98 |
Gunvor Energy Rotterdamgunvorenergyrotterdam.nl
Gunvor Energy Rotterdam is a refinery and terminal in Rotterdam, prioritizing safety, reliability, quality, and sustainability Part of Gunvor Group, they produce various fuels and are investing in energy transition |
111 |
| 99 |
Steenbergen b.v.steenbergentransport.com
Family-owned transport company operating a 24-hour distribution network across the Benelux with over 200 vehicles and advanced tracking. |
95 |
| 100 |
UnivΓ© Het Groene Hartunive.nl
Providing a sense of security through a collective approach, focusing on making life more enjoyable and safer without profit motives |
94 |
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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 Oct 24, 2026.
More company lists in South Holland
- The largest companies in South Holland 2,082
- Transportation, Logistics, Supply Chain and Storage companies in South Holland 219
- Retail chains in South Holland 150
- Logistics companies in South Holland 142
- Software Development companies in South Holland 127
- SaaS companies in South Holland 125
- Truck Transportation companies in South Holland 109
- Financial services firms in South Holland 107
- Hospitals and Health Care companies in South Holland 103
- Family-owned companies in South Holland 99
- Financial Services companies in South Holland 86
- IT Services and IT Consulting companies in South Holland 81
- Healthcare providers in South Holland 79
- Government Administration companies in South Holland 75
- Food and Beverage Manufacturing companies in South Holland 67
- Distributors and wholesalers in South Holland 65
- Public sector organisations in South Holland 61
- Insurance companies in South Holland 57
- Restaurants companies in South Holland 54
- Wellness and Fitness Services companies in South Holland 52
- Hotel and hospitality groups in South Holland 51
- IT services companies in South Holland 50
- Manufacturers in South Holland 50
- Retail companies in South Holland 48
The same list elsewhere in Netherlands
- Critical infrastructure operators in the Netherlands 614
- Critical infrastructure operators in North Holland 123
- Critical infrastructure operators in North Brabant 76
- Critical infrastructure operators in Gelderland 59
- Critical infrastructure operators in Overijssel 38
- Critical infrastructure operators in Limburg 30
- Critical infrastructure operators in Amsterdam 60
- Critical infrastructure operators in Rotterdam 29
- Critical infrastructure operators in The Hague 29
- Critical infrastructure operators in Utrecht 29