# The 42 largest corporate groups and holding companies in South Holland

Tamtam tracks 42 corporate groups and holding companies headquartered in South Holland. This list ranks all of them by number of employees on LinkedIn, led by Boskalis, Stedin and Kiwa. Their median headcount is 556. Half of them were founded in 1966 or later. The most common headquarters are Rotterdam (11), The Hague (7) and Schiedam (4).

These companies are large and established corporate groups and holdings based in South Holland, primarily engaged in civil engineering, utilities, professional services, and logistics. Notable examples include Boskalis, a global leader in dredging and maritime infrastructure; Stedin, providing reliable energy networks; Kiwa, a global leader in Testing, Inspection, and Certification; and Heerema Marine Contractors, specializing in offshore energy projects.

A significant pattern among these companies is their long-standing presence, with many founded in the late 19th or early 20th centuries, such as Stedin (1886) and Boskalis (1910). This indicates a region with deeply rooted industrial and service sectors.

🇳🇱 South Holland · 42 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Boskalis](https://www.tamtam.ai/c/boskalis) (boskalis.com)<br>Global leader in dredging, maritime infrastructure, and services, providing innovative solutions for coastal challenges, climate change effects, offshore energy, and marine salvage | Civil Engineering | 🇳🇱 Papendrecht | 6,940 | 1910 |
| 2 | [Stedin](https://www.tamtam.ai/c/stedin) (stedin.net)<br>Providing reliable energy through networks, transitioning to clean energy sources for a sustainable future, and fostering collaboration for a world full of new energy | Utilities | 🇳🇱 Rotterdam | 5,578 | 1886 |
| 3 | [Kiwa](https://www.tamtam.ai/c/kiwa) (kiwa.com)<br>A global leader in Testing, Inspection, and Certification, offering a wide range of services to create trust in products and processes worldwide | Professional Services | 🇳🇱 Rijswijk | 4,320 |  |
| 4 | [Heerema Marine Contractors](https://www.tamtam.ai/c/heerema-marine-contractors) (heerema.com)<br>A global marine contractor specializing in offshore energy projects, known for expertise and innovation within the industry | Engineering Services | 🇳🇱 Leiden | 3,796 |  |
| 5 | [Affidea](https://www.tamtam.ai/c/affidea) (affidea.com)<br>A pan-European provider of diagnostic imaging and healthcare services with a focus on patient safety and high-quality medical care | Medical Practices | 🇳🇱 The Hague | 2,327 | 1991 |
| 6 | [Control Union](https://www.tamtam.ai/c/control-union) (controlunion.com)<br>International commodity market services provider with global presence in over 70 countries offering logistics, inspections, certifications, and collateral management since 1920 | International Trade and Development | 🇳🇱 Rotterdam | 2,106 | 1920 |
| 7 | [Lelie zorggroep](https://www.tamtam.ai/c/lelie-zorggroep) (leliezorggroep.nl)<br>A group offering care and support in the Netherlands through various organizations focusing on healthcare, mental health, and elderly care with a Christian ethos | Hospitals and Health Care | 🇳🇱 Rotterdam | 1,947 | 2010 |
| 8 | [Louwman Group](https://www.tamtam.ai/c/louwman-group) (louwmangroup.nl)<br>Importing and distributing cars, providing mobility solutions, leasing, financing, vehicle adaptations, and operating retail and exclusive dealerships across Europe. | Motor Vehicle Manufacturing | 🇳🇱 The Hague | 1,762 |  |
| 9 | [VNG](https://www.tamtam.ai/c/vng-the-hague) (vng.nl)<br>Supporting municipalities to strengthen local governance, representing their interests, and providing a platform for innovation and dialogue with other government entities and societal organizations | Government Relations Services | 🇳🇱 The Hague | 1,385 | 1912 |
| 10 | [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 |
| 11 | [Royal Den Hartogh Logistics](https://www.tamtam.ai/c/royal-den-hartogh-logistics) (denhartogh.com)<br>A global logistics service provider specializing in safe transport of bulk liquids and gases for the chemical industry, with smart solutions through collaboration and expertise | Transportation, Logistics, Supply Chain and Storage | 🇳🇱 Rotterdam | 1,132 | 1920 |
| 12 | [Facilicom Groep](https://www.tamtam.ai/c/facilicom-groep) (facilicomgroup.nl)<br>Facilicom specializes in providing a wide range of facility services for businesses, governments, educational institutions, and healthcare organizations, focusing on quality and efficiency | Facilities Services | 🇳🇱 Schiedam | 1,042 | 1966 |
| 13 | [Personal Choice Professionals](https://www.tamtam.ai/c/personal-choice-professionals) (mooiedomeinnaam.nl)<br>Personal Choice Professionals oversees the financial, marketing, office support, and HR policies of Assistant2, Skilled4Finance and Experts4HR from its headquarters in Den Haag | Staffing and Recruiting | 🇳🇱 The Hague | 886 | 2001 |
| 14 | [Royal Van Leeuwen](https://www.tamtam.ai/c/royal-van-leeuwen) (vanleeuwen.com)<br>specialized steel pipe trading company providing customized materials worldwide with expertise in sourcing, logistics, project management, and customer collaboration | Wholesale | 🇳🇱 Zwijndrecht | 810 | 1924 |
| 15 | [TBI](https://www.tamtam.ai/c/tbi) (tbi.nl)<br>A leading player in engineering, construction, and infrastructure, with a focus on delivering innovative and sustainable solutions, investing in social initiatives for a better future | Construction | 🇳🇱 Rotterdam | 719 | 1982 |
| 16 | [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 |
| 17 | [Isero B.V.](https://www.tamtam.ai/c/isero-b-v) (isero.nl)<br>Wholesale supplier of hardware, tools, fasteners, workwear, and safety equipment with extensive product range and expert customer support. | Wholesale | 🇳🇱 Waddinxveen | 592 | 1826 |
| 18 | [Batenburg Techniek N.V.](https://www.tamtam.ai/c/batenburg-techniek-n-v) (batenburg.nl)<br>A technology company specializing in smart industry solutions, providing smart components, installations, and software for industries to become smarter, safer, and more sustainable | Mechanical Or Industrial Engineering | 🇳🇱 Rotterdam | 588 |  |
| 19 | [The Greenery](https://www.tamtam.ai/c/the-greenery) (thegreenery.com)<br>A leading European vegetable and fruit sales company owned by horticultural cooperative members, supplying products worldwide with a focus on food safety and sustainability | Food and Beverage Manufacturing | 🇳🇱 Barendrecht | 586 | 1996 |
| 20 | [Nederlandse Loterij](https://www.tamtam.ai/c/nederlandse-loterij) (nederlandseloterij.nl)<br>Contribute to a happier, healthier, and more active Netherlands by providing responsible gambling options and supporting sports and charities | Gambling Facilities and Casinos | 🇳🇱 Rijswijk | 562 | 2016 |
| 21 | [BRAC International](https://www.tamtam.ai/c/brac-international) (bracinternational.org)<br>A global non-profit organization empowering individuals and communities through social development, microfinance, and social entrepreneurship to overcome poverty and achieve self-reliance | Non-profit Organizations | 🇳🇱 The Hague | 556 | 1972 |
| 22 | [Amega](https://www.tamtam.ai/c/amega) (amega.nl)<br>A growing and profitable organization in the automotive industry in Zuid-Holland Zuid, representing various car brands and offering additional services like vehicle outfitting and repairs | Motor Vehicle Manufacturing | 🇳🇱 Dordrecht | 539 |  |
| 23 | [Van Hessen](https://www.tamtam.ai/c/van-hessen) (vanhessen.com)<br>Harvesting, processing, and distributing natural casings, meat products, and pharmaceutical products, ensuring high quality through supply chain control and global operations. | Food and Beverage Manufacturing | 🇳🇱 Nieuwerkerk aan den IJssel | 429 | 1902 |
| 24 | [BAM International bv - this LinkedIn page is closed](https://www.tamtam.ai/c/bam-international-bv-this-linkedin-page-is-closed) (bam.com)<br>An international construction company, part of a European group, undertaking projects worldwide in marine, building, infrastructure, and industrial sectors | Construction | 🇳🇱 Gouda | 427 |  |
| 25 | [KOTUG International](https://www.tamtam.ai/c/kotug-international) (kotug.com)<br>A leading international towage and maritime company providing vessel services, training, and consultancy with a focus on innovation and sustainability | Maritime Transportation | 🇳🇱 Rotterdam | 426 |  |
| 26 | [Van Ameyde Group](https://www.tamtam.ai/c/van-ameyde-group) (vanameyde.com)<br>Global professional services firm specializing in insurance, claims, and risk management, providing swift solutions and unrivaled systems to secure clients' success worldwide | Insurance | 🇳🇱 Rijswijk | 382 |  |
| 27 | [Blue Phoenix](https://www.tamtam.ai/c/blue-phoenix) (bluephoenix-group.com)<br>Global resource recovery specializing in transforming incinerator bottom ash, construction waste, and contaminated soils into renewed materials for construction and infrastructure projects. | Environmental Services | 🇳🇱 Rotterdam | 377 | 2008 |
| 28 | [Incluzio](https://www.tamtam.ai/c/incluzio) (incluzio.nl)<br>Incluzio integrates care, services, and social work to efficiently improve neighborhoods, tackling collective issues and enhancing community well-being through result-oriented solutions | Hospitals and Health Care | 🇳🇱 Schiedam | 377 | 2014 |
| 29 | [VORM Holding](https://www.tamtam.ai/c/vorm-holding) (vorm.nl)<br>A versatile development and construction company offering services from creative development to final realization in project, design, and building sectors | Real Estate | 🇳🇱 Rotterdam | 373 | 1919 |
| 30 | [Wittebrug](https://www.tamtam.ai/c/wittebrug) (wittebrug.nl)<br>Representing renowned car brands, providing new and used vehicles, leasing, and automotive services across the Hague, Delft, Leiden, and Rotterdam regions | Motor Vehicle Manufacturing | 🇳🇱 The Hague | 364 | 1939 |
| 31 | [Ingka Investments](https://www.tamtam.ai/c/ingka-investments) (ingka.com)<br>invests in and manages diverse assets including forestland, renewable energy, and real estate, ensuring financial resilience and contributing to sustainability for IKEA. | Investment Management | 🇳🇱 Leiden | 351 | 2018 |
| 32 | [Circular IT group](https://www.tamtam.ai/c/circular-it-group) (circularitgroup.com)<br>Support customers maximizing IT hardware value through lifecycle extension, refurbishing, rental, repair, recommerce, reducing e-waste and environmental impact. | IT Services and IT Consulting | 🇳🇱 Zoetermeer | 327 | 2022 |
| 33 | [N.V. Juva](https://www.tamtam.ai/c/n-v-juva) (juva.nl)<br>A network company specializing in sustainable energy transportation, products, and services, promoting innovation and collaboration to achieve a livable and sustainable society | Community Services | 🇳🇱 Poeldijk | 326 | 2017 |
| 34 | [De Rijke Group](https://www.tamtam.ai/c/de-rijke-group) (derijke.com)<br>Providing supply chain solutions, transport, warehousing, value-added logistics, and global freight forwarding for petrochemical industry clients across Europe and Middle-East. | Transportation, Logistics, Supply Chain and Storage | 🇳🇱 Spijkenisse | 318 | 1945 |
| 35 | [VT Group](https://www.tamtam.ai/c/vt-group) (vtgroup.nl)<br>A maritime company offering logistic products, safe operations, fleet management, and bunkering services with a focus on sustainability and social responsibility | Maritime Transportation | 🇳🇱 Rotterdam | 314 | 1916 |
| 36 | [Wärtsilä Netherlands B.V.](https://www.tamtam.ai/c/wartsila-netherlands-b-v) (wartsila.com)<br>Global leader in innovative technologies and lifecycle solutions for marine and energy markets, emphasizing sustainability, equal opportunities, and employee growth | Maritime Transportation | 🇳🇱 Schiedam | 312 | 1834 |
| 37 | [Mooi Sociaal](https://www.tamtam.ai/c/mooi-sociaal) (mooisociaal.nl)<br>An independent foundation coordinating youth teams in South Holland, promoting empowerment and providing support within families' own environment | Non-profit Organizations | 🇳🇱 Dordrecht | 307 | 2014 |
| 38 | [Blinqx](https://www.tamtam.ai/c/blinqx) (blinqx.tech)<br>Provider of software solutions empowering service professionals' growth and success by digitalizing and optimizing processes for 200,000 users across various sectors. | Software Development | 🇳🇱 Rotterdam | 224 | 2019 |
| 39 | [Hudig & Veder B.V.](https://www.tamtam.ai/c/hudig-and-veder-b-v) (hudigveder.nl)<br>Independent logistics provider offering sea, road, intermodal transport, transhipment, storage, port agency, and customs handling services. | Transportation, Logistics, Supply Chain and Storage | 🇳🇱 Rhoon | 221 |  |
| 40 | [Koninklijke PostNL B.V.](https://www.tamtam.ai/c/koninklijke-postnl-b-v) (postnl.nl)<br>International shipping company, now operating as FedEx in the US Offering efficient and reliable delivery services with expanded capabilities | Freight and Package Transportation | 🇳🇱 The Hague | 186 | 1799 |
| 41 | [VETUS](https://www.tamtam.ai/c/vetus) (vetus.com)<br>Global leader in designing and manufacturing complete onboard boat systems for recreational and commercial vessels, focusing on innovation and superior customer experience worldwide | Maritime Transportation | 🇳🇱 Schiedam | 185 | 1964 |
| 42 | [Woningborg N.V.](https://www.tamtam.ai/c/woningborg-n-v) (woningborg.nl)<br>A leader in the Netherlands for 40 years, ensuring home warranties, preventing construction costs, and enhancing new home quality through guarantee and inspection services | Insurance | 🇳🇱 Gouda | 79 | 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 13, 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

- [Corporate groups and holding companies in the Netherlands](https://www.tamtam.ai/l/holding-companies-netherlands) (235)
- [Corporate groups and holding companies in North Holland](https://www.tamtam.ai/l/holding-companies-north-holland) (45)
- [Corporate groups and holding companies in North Brabant](https://www.tamtam.ai/l/holding-companies-north-brabant) (35)
- [Corporate groups and holding companies in Gelderland](https://www.tamtam.ai/l/holding-companies-gelderland) (26)
- [Corporate groups and holding companies in Amsterdam](https://www.tamtam.ai/l/holding-companies-amsterdam) (26)

## The same list elsewhere

- [Corporate groups and holding companies in the world](https://www.tamtam.ai/l/holding-companies-in-the-world) (12,862)
- [Corporate groups and holding companies in Europe](https://www.tamtam.ai/l/holding-companies-in-europe) (4,395)

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Source: https://www.tamtam.ai/l/holding-companies-south-holland