Company lists · Data refreshed September 2026

Top 25 Subsea services companies based in Norway

Name: Subsea services companies based in Norway
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 284 companies tracked

RevenueBase identified 284 subsea services companies headquartered in Norway as of September 2026 and tracks 13,775 professional contacts across them, including 4,534 with verified work emails. Oslo is the largest hub.

This list covers subsea services companies headquartered in Norway, 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 22, 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 22, 2026 86% judged on-target in blind review

284Companies

13,775Contacts tracked

4,534Verified emails

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The 25 largest subsea services companies based in Norway

Ranked by team size

Top 25 of 284 subsea services companies based in Norway, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to subsea services companies: 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	DOF	Strong evidence	Bergen, NorwayHQ checked Sep 22, 2026	5,001-10,000	2,942 contacts →
	Strong evidence “With a multi-national workforce of over 5,700 personnel, DOF is an international group of companies which owns and operates a fleet of modern offshore/subsea vessels, with an…” Source: RevenueBase Database · checked Sep 22, 2026
2	Shearwater Geoservices	Indirect evidence	Laksevåg, NorwayHQ checked Sep 22, 2026	1,001-5,000	1,031 contacts →
	Indirect evidence “Shearwater is a global marine geoscience and technology business.” Source: RevenueBase Database · checked Sep 22, 2026
3	AGR	Strong evidence	Oslo, NorwayHQ checked Sep 22, 2026	501-1,000	768 contacts →
	Strong evidence “AGR – an Aqualis company – is a multidisciplinary consultancy, specialising in drilling & wells, subsurface, marine and subsea solutions, resourcing, technical safety and software…” Source: RevenueBase Database · checked Sep 22, 2026
4	Cosl Drilling Europe AS	Indirect evidence	Sandnes, NorwayHQ checked Sep 22, 2026	501-1,000	629 contacts →
	Indirect evidence “Always do better" is our guiding principle leading us through the energy transition and towards our vision of becoming the preferred supplier of drilling services.” Source: RevenueBase Database · checked Sep 22, 2026
5	Mhwirth	Indirect evidence	Kristiansand, NorwayHQ checked Sep 22, 2026	1,001-5,000	560 contacts →
	Indirect evidence “October 2021.” Source: RevenueBase Database · checked Sep 22, 2026
6	Island Offshore	Indirect evidence	Ulsteinvik, NorwayHQ checked Sep 22, 2026	501-1,000	501 contacts →
	Indirect evidence “Island Offshore - The Island Offshore Group is a leading provider of services to the offshore industry ranging from Platform Supply, Walk-to-work and Anchor Handling to Advanced…” Source: RevenueBase Database · checked Sep 22, 2026
7	Global Maritime	Indirect evidence	Stavanger, NorwayHQ checked Sep 22, 2026	201-500	472 contacts →
	Indirect evidence “Global Maritime delivers integrated marine solutions for a changing offshore world.” Source: RevenueBase Database · checked Sep 22, 2026
8	Reach Subsea	Strong evidence	Haugesund, NorwayHQ checked Sep 22, 2026	201-500	454 contacts →
	Strong evidence “Reach Subsea ASA (“Reach Subsea”, “Reach” or “the Group”) is a prominent offshore contractor that offer high quality solutions and technology to clients in need of ocean data and…” Source: RevenueBase Database · checked Sep 22, 2026
9	Eidesvik Offshore ASA	Indirect evidence	Langevag, NorwayHQ checked Sep 22, 2026	501-1,000	308 contacts →
	Indirect evidence “Offshore Shipping Company.” Source: RevenueBase Database · checked Sep 22, 2026
10	Ocean Installer	Indirect evidence	Stavanger, NorwayHQ checked Sep 22, 2026	201-500	299 contacts →
	Indirect evidence “Ocean Installer is a leading marine construction company that specializes in offshore installation services with more than 15 years of experience delivering large and complex…” Source: RevenueBase Database · checked Sep 22, 2026
11	REM Offshore	Indirect evidence	Fosnavåg, NorwayHQ checked Sep 22, 2026	201-500	288 contacts →
	Indirect evidence “About Rem Offshore Rem Offshore is a new company with old roots – tracing back to 1978 with fishery activities in Norway, Rem Offshore organisation today operates worldwide, with…” Source: RevenueBase Database · checked Sep 22, 2026
12	Linjebygg AS	Indirect evidence	Molde, NorwayHQ checked Sep 22, 2026	201-500	261 contacts →
	Indirect evidence “Linjebygg provides LIFE CYCLE EXTENSION.” Source: RevenueBase Database · checked Sep 22, 2026
13	Akofs Offshore	Strong evidence	Oslo, NorwayHQ checked Sep 22, 2026	201-500	233 contacts →
	Strong evidence “AKOFS Offshore is a global provider of vessel based subsea well construction and intervention services to the oil and gas industry.” Source: RevenueBase Database · checked Sep 22, 2026
14	Omega Subsea	Strong evidence	Bergen, NorwayHQ checked Sep 22, 2026	201-500	209 contacts →
	Strong evidence “Omega Subsea delivers ROV, survey, engineering, and subsea project services to the global offshore industry.” Source: RevenueBase Database · checked Sep 22, 2026
15	Olympic Subsea ASA	Indirect evidence	Fosnavåg Brygge 2.etg, NorwayHQ checked Sep 22, 2026	501-1,000	201 contacts →
	Indirect evidence “For thousands of years, people on Norway’s weather torn west coast have ridden the waves and conquered the sea.” Source: RevenueBase Database · checked Sep 22, 2026
16	Imenco	Indirect evidence	Aksdal, NorwayHQ checked Sep 22, 2026	201-500	199 contacts →
	Indirect evidence “Imenco is a group of companies working mainly in five main business areas: Offshore oil & gas, offshore renewables, aquaculture, marine & naval and industrial.” Source: RevenueBase Database · checked Sep 22, 2026
17	Seabird Exploration	Strong evidence	Bergen, NorwayHQ checked Sep 22, 2026	501-1,000	194 contacts →
	Strong evidence “SeaBird Exploration is a wholly owned subsidiary of SED Energy Holdings Plc, which is listed on Euronext Oslo Børs.” Source: RevenueBase Database · checked Sep 22, 2026
18	PSW Technology	Indirect evidence	Mongstad, NorwayHQ checked Sep 22, 2026	201-500	133 contacts →
	Indirect evidence “PSW Technology offers a wide range of services and solutions to the global drilling industry.” Source: RevenueBase Database · checked Sep 22, 2026
19	Havila Subsea & Renewables	Strong evidence	Aalesund, NorwayHQ checked Sep 22, 2026	201-500	120 contacts →
	Strong evidence “Havila Subsea & Renewables operates an advanced fleet of vessels dedicated to Diving, Offshore Inspection, Repair, and Maintenance (IRM), as well as Construction.” Source: RevenueBase Database · checked Sep 22, 2026
20	Island Drilling Company AS	Indirect evidence	Sandsli, NorwayHQ checked Sep 22, 2026	51-200	114 contacts →
	Indirect evidence “Island Drilling was established in 2006 by industry veterans and Island Offshore, the leading global player in well intervention, to build and own special purpose semi-submersible…” Source: RevenueBase Database · checked Sep 22, 2026
21	Techouse AS	Indirect evidence	Sandnes, NorwayHQ checked Sep 22, 2026	51-200	106 contacts →
	Indirect evidence “Techouse is a leader in the provision of offshore platform processing equipment and services to the international oil & gas industry.” Source: RevenueBase Database · checked Sep 22, 2026
22	NYMO	Indirect evidence	Grimstad, NorwayHQ checked Sep 22, 2026	201-500	105 contacts →
	Indirect evidence “Nymo is a full-service engineering, procurement and construction company within the oil & gas and process industry.” Source: RevenueBase Database · checked Sep 22, 2026
23	Optime, A Halliburton Service	Strong evidence	Notodden, NorwayHQ checked Sep 22, 2026	51-200	98 contacts →
	Strong evidence “Optime, A Halliburton Service is an innovative subsea oil and gas provider focusing on cost efficient solutions specifically towards products within the well access, well…” Source: RevenueBase Database · checked Sep 22, 2026
24	Abyss AS	Indirect evidence	Kristiansund, NorwayHQ checked Sep 22, 2026	201-500	84 contacts →
	Indirect evidence “Abyss utfører alle tjenester på sjøen - over og under vann.” Source: RevenueBase Database · checked Sep 22, 2026
25	Level Offshore	Indirect evidence	Haugesund, NorwayHQ checked Sep 22, 2026	51-200	78 contacts →
	Indirect evidence “Connecting Top Talent with Leading Offshore Companies.” Source: RevenueBase Database · checked Sep 22, 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: subsea services companies. 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 subsea services companies.
Partial evidence: Its own public description names part of subsea services companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name subsea services companies. 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 284 subsea services companies based in Norway

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Subsea services companies based in Norway at a glance

As of Sep 22, 2026

32.9%Verified-email coverage

48.5Average contacts per company

11-50Median size (employees)

7.4%Largest-city concentration · Oslo

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

100

11-50

110

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for Norway, so it is reported there. Company counts and contact totals on this page are exact for Norway, over 284 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 subsea services companies, 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 Norway whose own description of what they do matches “subsea services companies”. 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 subsea services companies), 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 subsea services companies, and records with no verified work email. Companies headquartered outside Norway 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, 4,534 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 22, 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 subsea services companies, 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 subsea services companies are there based in Norway?

RevenueBase identified 284 subsea services companies headquartered in Norway 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?

DOF, headquartered in Bergen, tops this list with the largest team on record.

Which city has the most subsea services companies?

Oslo leads with 21 headquartered companies, followed by Stavanger (20) and Bergen (12).

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 4,534 verified decision-maker contacts tracked across these 284 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 22, 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.