Company lists · Data refreshed September 2026

Top 25 Offshore well services based in the Netherlands

Name: Offshore well services based in the Netherlands
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 150 companies tracked

RevenueBase identified 150 offshore well services headquartered in the Netherlands as of September 2026 and tracks 10,366 professional contacts across them, including 2,312 with verified work emails. Rotterdam is the largest hub.

This list covers offshore well services headquartered in the Netherlands, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

150Companies

10,366Contacts tracked

2,312Verified emails

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The 25 largest offshore well services based in the Netherlands

Ranked by team size

Top 25 of 150 offshore well services based in the Netherlands, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to offshore well services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Heerema Marine Contractors	Partial evidence	Leiden, NetherlandsHQ checked Sep 20, 2026	1,001-5,000	2,643 contacts →
	Partial evidence “Heerema Marine Contractors is a world-leading marine contractor in the international offshore energy industry.” Source: RevenueBase Database · checked Sep 20, 2026
2	Hertel	Indirect evidence	Rotterdam, NetherlandsHQ checked Sep 20, 2026	5,001-10,000	1,167 contacts →
	Indirect evidence “Hertel is a leading international, multi-disciplinary, industrial services company.” Source: RevenueBase Database · checked Sep 20, 2026
3	Dixstone	Indirect evidence	Hoofddorp, NetherlandsHQ checked Sep 20, 2026	1,001-5,000	546 contacts →
	Indirect evidence “Headquartered in Hoofddorp, the Netherlands, Dixstone is an affiliate of the Perenco Group, specialized in integrated solutions for the industry.” Source: RevenueBase Database · checked Sep 20, 2026
4	Ampelmann Operations	Partial evidence	Delft, NetherlandsHQ checked Sep 20, 2026	201-500	395 contacts →
	Partial evidence “Ampelmann is the leading offshore access provider that delivers safe and efficient access solutions to the global offshore energy sector.” Source: RevenueBase Database · checked Sep 20, 2026
5	N-Sea Group	Indirect evidence	Dordrecht, NetherlandsHQ checked Sep 20, 2026	201-500	364 contacts →
	Indirect evidence “N-Sea is an end-to-end subsea services provider.” Source: RevenueBase Database · checked Sep 20, 2026
6	Seafox	Partial evidence	Hoofddorp, NetherlandsHQ checked Sep 20, 2026	1,001-5,000	313 contacts →
	Partial evidence “Seafox is a leading global offshore jack-up company, providing services to support the oil & gas and renewable industry.” Source: RevenueBase Database · checked Sep 20, 2026
7	Gustomsc	Partial evidence	Schiedam, NetherlandsHQ checked Sep 20, 2026	201-500	272 contacts →
	Partial evidence “GustoMSC, part of NOV, provides offshore designs, reliable equipment and engineering solutions.” Source: RevenueBase Database · checked Sep 20, 2026
8	The Wellgear Group	Partial evidence	Assen, NetherlandsHQ checked Sep 20, 2026	201-500	225 contacts →
	Partial evidence “The WellGear Group provides a full range of high-quality services for both Onshore & Offshore to the international Oil & Gas, Petrochemical and Geothermal industries.” Source: RevenueBase Database · checked Sep 20, 2026
9	Glomar Offshore	Partial evidence	Den Helder, NetherlandsHQ checked Sep 20, 2026	n/a	225 contacts →
	Partial evidence “GloMar Offshore operates a diverse fleet of purpose built offshore support vessels, which meet exceedingly high standards in safety and operational capabilities.” Source: RevenueBase Database · checked Sep 20, 2026
10	Oceanwide	Indirect evidence	Vlissingen, NetherlandsHQ checked Sep 20, 2026	501-1,000	202 contacts →
	Indirect evidence “Oceanwide is an international provider of diversified personnel services focused on the Maritime, Oil & Gas, Wind Energy and Construction industries.” Source: RevenueBase Database · checked Sep 20, 2026
11	Petrodec	Partial evidence	Spicalaan 13 2132 Jg Hoofddorp the Netherlands, NetherlandsHQ checked Sep 20, 2026	51-200	168 contacts →
	Partial evidence “Petrodec is a responsible offshore contractor, ready to deliver safe, efficient and innovative decommissioning or re-use solutions.” Source: RevenueBase Database · checked Sep 20, 2026
12	Bluestream, An OEG Company	Indirect evidence	Den Helder, NetherlandsHQ checked Sep 20, 2026	51-200	160 contacts →
	Indirect evidence “Bluestream is now part of OEG's subsea service division.” Source: RevenueBase Database · checked Sep 20, 2026
13	Rederij Groen BV	Indirect evidence	The Hague, NetherlandsHQ checked Sep 20, 2026	11-50	133 contacts →
	Indirect evidence “Rederij Groen BV was founded in 1973 as a Sport Fishing Company in Scheveningen, The Netherlands, with three vessels to its name.” Source: RevenueBase Database · checked Sep 20, 2026
14	Seacontractors	Indirect evidence	Flushing, NetherlandsHQ checked Sep 20, 2026	51-200	109 contacts →
	Indirect evidence “Seacontractors is the leading maritime service provider and anchor handling tug supplier (AHTS) worldwide, offering expert project support.” Source: RevenueBase Database · checked Sep 20, 2026
15	OAK Offshore	Partial evidence	The Hague, NetherlandsHQ checked Sep 20, 2026	11-50	101 contacts →
	Partial evidence “OAK Offshore Companies are leading providers of experienced and skilled professionals to the: Oil & Gas Industry Offshore Wind Maritime Industry We deliver this through our…” Source: RevenueBase Database · checked Sep 20, 2026
16	The Offshore Partners BV	Strong evidence	Rotterdam, NetherlandsHQ checked Sep 20, 2026	51-200	94 contacts →
	Strong evidence “The Offshore Partners provides technical and project management services for vessel new-builds, conversions and R&M projects, as well as for installation projects in offshore…” Source: RevenueBase Database · checked Sep 20, 2026
17	VAN Laar Maritime B.V	Indirect evidence	Ijmuiden, NetherlandsHQ checked Sep 20, 2026	11-50	81 contacts →
	Indirect evidence “Van Laar Maritime owns and operates a growing fleet of 33 guard, chase- and (seismic) support vessels worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
18	Dräger Marine & Offshore	Partial evidence	Hoogvliet, NetherlandsHQ checked Sep 20, 2026	51-200	81 contacts →
	Partial evidence “Dräger Marine & Offshore is one of the major players in the port of Rotterdam when it comes to high quality marine & offshore services in the field of firefighting, rescue and…” Source: RevenueBase Database · checked Sep 20, 2026
19	KCI Offshore Engineering	Partial evidence	Rotterdam, NetherlandsHQ checked Sep 20, 2026	51-200	78 contacts →
	Partial evidence “KCI Offshore Engineering has been providing design, engineering, and consultancy services to the offshore industry for over 40 years.” Source: RevenueBase Database · checked Sep 20, 2026
20	Balance Point Control BPC	Indirect evidence	Emmen, NetherlandsHQ checked Sep 20, 2026	51-200	70 contacts →
	Indirect evidence “Balance Point Control (BPC) was established in in Emmen, Netherlands by a small group of colleagues, with the intent of providing more than just workover, snubbing and wireline…” Source: RevenueBase Database · checked Sep 20, 2026
21	VAN Stee Offshore	Partial evidence	Harlingen, NetherlandsHQ checked Sep 20, 2026	51-200	70 contacts →
	Partial evidence “Van Stee Offshore is a company specialised in supporting offshore, Oil & Gas, dredging- and Renewable energy projects worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
22	Sima Charters BV	Partial evidence	Maassluis, NetherlandsHQ checked Sep 20, 2026	51-200	63 contacts →
	Partial evidence “Sima Charters is a company specialized in Crew Transfers Services, offering launch services to anchorages, offshore wind projects and dredging/construction work support activities.” Source: RevenueBase Database · checked Sep 20, 2026
23	Seamar	Indirect evidence	Den Helder, NetherlandsHQ checked Sep 20, 2026	11-50	63 contacts →
	Indirect evidence “SeaMar is a family-owned maritime service provider, founded in and headquartered in Den Helder.” Source: RevenueBase Database · checked Sep 20, 2026
24	Multimetaal	Partial evidence	Den Helder, NetherlandsHQ checked Sep 20, 2026	51-200	57 contacts →
	Partial evidence “History Multimetaal was established in 1973 to provide construction design, prefabrication, in-house testing and certification, offshore support services to the oil and gas…” Source: RevenueBase Database · checked Sep 20, 2026
25	Seatools	Partial evidence	Numansdorp, NetherlandsHQ checked Sep 20, 2026	51-200	56 contacts →
	Partial evidence “Seatools helps its clients in the dredging and offshore energy business achieve higher workability and higher operational efficiency, both key to lowering cost and environmental…” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: offshore well services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names offshore well services.
Partial evidence: Its own public description names part of offshore well services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore well services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 150 offshore well services based in the Netherlands

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Offshore well services based in the Netherlands at a glance

As of Sep 20, 2026

22.3%Verified-email coverage

69.1Average contacts per company

11-50Median size (employees)

8.0%Largest-city concentration · Rotterdam

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for Netherlands, so it is reported there. Company counts and contact totals on this page are exact for Netherlands, over 150 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among offshore well services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the Netherlands whose own description of what they do matches “offshore well services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names offshore well services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among offshore well services, and records with no verified work email. Companies headquartered outside Netherlands are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 2,312 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names offshore well services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many offshore well services are there based in the Netherlands?

RevenueBase identified 150 offshore well services headquartered in the Netherlands as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Heerema Marine Contractors, headquartered in Aa, tops this list with the largest team on record.

Which city has the most offshore well services?

Rotterdam leads with 12 headquartered companies, followed by Amsterdam (6) and Ijmuiden (6).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,312 verified decision-maker contacts tracked across these 150 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.