Company lists · Data refreshed October 2026

Top 25 Deepwater installation contractors based in Norway

Name: Deepwater installation contractors based in Norway
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 11, 2026 123 companies tracked

RevenueBase identified 123 company matches for deepwater installation contractors associated with Norway as of October 2026 and tracks 8,632 professional contacts across them, including 2,891 with verified work emails. Stavanger is the largest hub.

This list covers company matches for deepwater installation contractors associated with Norway, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 11, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 11, 2026 How this list was built

123Companies

8,632Contacts tracked

2,891Verified emails

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The 25 largest deepwater installation contractors based in Norway

Ranked by team size

Top 25 of 123 company matches for deepwater installation contractors based in Norway, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 11, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	DOF	Exact match	Bergen, NorwayHQ recorded Oct 11, 2026	5,001-10,000	3,269 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
2	Mhwirth	Exact match	Kristiansand, NorwayHQ recorded Oct 11, 2026	1,001-5,000	570 contacts →
	Exact match “October 2021.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
3	Island Offshore	Exact match	Ulsteinvik, NorwayHQ recorded Oct 11, 2026	501-1,000	532 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
4	Reach Subsea	Exact match	Haugesund, NorwayHQ recorded Oct 11, 2026	201-500	481 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
5	Global Maritime	Exact match	Stavanger, NorwayHQ recorded Oct 11, 2026	201-500	463 contacts →
	Exact match “Global Maritime delivers integrated marine solutions for a changing offshore world.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
6	Ocean Installer	Exact match	Stavanger, NorwayHQ recorded Oct 11, 2026	201-500	279 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7	Akofs Offshore	Exact match	Oslo, NorwayHQ recorded Oct 11, 2026	201-500	246 contacts →
	Exact match “AKOFS Offshore is a global provider of vessel based subsea well construction and intervention services to the oil and gas industry.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8	Imenco	Exact match	Aksdal, NorwayHQ recorded Oct 11, 2026	201-500	196 contacts →
	Exact match “Imenco is a group of companies working mainly in five main business areas: Offshore oil & gas, offshore renewables, aquaculture, marine & naval and industrial.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
9	Island Drilling Company AS	Exact match	Sandsli, NorwayHQ recorded Oct 11, 2026	51-200	128 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
10	Havila Subsea & Renewables	Exact match	Aalesund, NorwayHQ recorded Oct 11, 2026	201-500	123 contacts →
	Exact match “Havila Subsea & Renewables operates an advanced fleet of vessels dedicated to Diving, Offshore Inspection, Repair, and Maintenance (IRM), as well as Construction.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
11	Optime, A Halliburton Service	Exact match	Notodden, NorwayHQ recorded Oct 11, 2026	51-200	118 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12	Techouse AS	Exact match	Sandnes, NorwayHQ recorded Oct 11, 2026	51-200	102 contacts →
	Exact match “Techouse is a leader in the provision of offshore platform processing equipment and services to the international oil & gas industry.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13	NYMO	Exact match	Grimstad, NorwayHQ recorded Oct 11, 2026	201-500	99 contacts →
	Exact match “Nymo is a full-service engineering, procurement and construction company within the oil & gas and process industry.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
14	Moss Maritime	Exact match	Lysaker, NorwayHQ recorded Oct 11, 2026	51-200	67 contacts →
	Exact match “Moss Maritime provides leading technology and expertise within design and engineering services to the offshore energy sector as well as other ocean-based sectors.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15	SUB SEA Services AS	Exact match	Stavanger, NorwayHQ recorded Oct 11, 2026	51-200	57 contacts →
	Exact match “Sub Sea Services is a solution-focused, flexible and collaboration oriented partner to the offshore drilling industry.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16	Technip India Limited	Exact match	Sandvika, NorwayHQ recorded Oct 11, 2026	51-200	57 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17	Subseadesign AS	Exact match	Lierbyen, NorwayHQ recorded Oct 11, 2026	51-200	53 contacts →
	Exact match “SubseaDesign (SD) is an engineering, design and fabrication company providing equipment and services for the oil and gas industry.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18	Agility	Exact match	Skien, NorwayHQ recorded Oct 11, 2026	51-200	52 contacts →
	Exact match “A Trusted Partner in Subsea Technology.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
19	Semar AS	Exact match	Lysaker, NorwayHQ recorded Oct 11, 2026	11-50	51 contacts →
	Exact match “Semar was founded in 1980 as an independent engineering consultant firm devoted primarily to the offshore oil and gas industry.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20	RTS	Exact match	Åkrehamn, NorwayHQ recorded Oct 11, 2026	11-50	49 contacts →
	Exact match “RTS is a supplier of engineering solutions, equipment rental, product sales and personnel supply.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21	Subseapartner AS	Exact match	Haugesund, NorwayHQ recorded Oct 11, 2026	11-50	41 contacts →
	Exact match “SubseaPartner is a leading diving contractor in the shallow-deep segment.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22	Swire Seabed	Exact match	Bergen, NorwayHQ recorded Oct 11, 2026	51-200	41 contacts →
	Exact match “Swire Seabed provides a highly flexible range of integrated subsea services to the global Oil & Gas and renewables industries.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23	Tratec	Exact match	Kristiansand, NorwayHQ recorded Oct 11, 2026	201-500	40 contacts →
	Exact match “Tratec is a supplier of technical solutions within electrical, automation, mechanical and piping to the offshore & marine, process industry and construction market.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24	Petrolink AS	Exact match	NorwayHQ recorded Oct 11, 2026	51-200	36 contacts →
	Exact match “Petrolink operates platforms, subsea installations and floating production units offshore, oil and gas terminals onshore, refineries and process plants including power plants and…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25	TIOS	Exact match	Stavanger, NorwayHQ recorded Oct 11, 2026	n/a	35 contacts →
	Exact match “As of July 29th 2021 TIOS is fully owned by TechnipFMC.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “deepwater installation contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 123 deepwater installation contractors based in Norway

See the full list, filter by size, metro and specialty, and access 2,891 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Deepwater installation contractors based in Norway at a glance

As of Oct 11, 2026

33.5%Verified-email coverage

70.2Average contacts per company

11-50Median size (employees)

16.3%Largest-city concentration · Stavanger

Oct 11, 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 Norway, so it is reported there. Company counts and contact totals on this page are exact for Norway, over 123 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Norway whose business descriptions match “deepwater installation contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,891 professional contacts with verified work emails across the full matched dataset. 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 October 11, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “deepwater installation contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many deepwater installation contractors are there based in Norway?

RevenueBase identified 123 company matches for deepwater installation contractors associated with Norway as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

DOF tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most deepwater installation contractors?

Stavanger leads with 20 company records, followed by Haugesund (9) and Kristiansand (7).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,891 professional contacts with verified work emails tracked across these 123 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 11, 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 SmartSearch, 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.