Company lists · Data refreshed September 2026

Top 25 Offshore platform installation companies based in Norway

Name: Offshore platform installation companies based in Norway
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 114 companies tracked

RevenueBase identified 114 offshore platform installation companies headquartered in Norway as of September 2026 and tracks 6,535 professional contacts across them, including 1,934 with verified work emails and 256 with mobile numbers. Stavanger is the largest hub.

This list covers offshore platform installation 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

114Companies

6,535Contacts tracked

1,934Verified emails

256Mobile numbers

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The 25 largest offshore platform installation companies based in Norway

Ranked by team size

Top 25 of 114 offshore platform installation companies based in Norway, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names offshore platform installation companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	BW OffshorePartial evidence	Oslo, NorwayHQ checked Sep 5, 2026	501-1,000	1,860
	“BW Offshore engineers innovative floating production solutions.” Source: company website · checked Sep 5, 2026
2	MhwirthIndirect evidence	Kristiansand, NorwayHQ checked Sep 5, 2026	1,001-5,000	560
	“October 2021.” Source: company website · checked Sep 5, 2026
3	Island OffshoreStrong evidence	Ulsteinvik, NorwayHQ checked Sep 5, 2026	501-1,000	501
	“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: company website · checked Sep 5, 2026
4	Ocean InstallerStrong evidence	Stavanger, NorwayHQ checked Sep 5, 2026	201-500	299
	“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: company website · checked Sep 5, 2026
5	Linjebygg ASIndirect evidence	Molde, NorwayHQ checked Sep 5, 2026	201-500	261
	“Linjebygg provides LIFE CYCLE EXTENSION.” Source: company website · checked Sep 5, 2026
6	Akofs OffshorePartial evidence	Oslo, NorwayHQ checked Sep 5, 2026	201-500	233
	“AKOFS Offshore is a global provider of vessel based subsea well construction and intervention services to the oil and gas industry.” Source: company website · checked Sep 5, 2026
7	YabimoIndirect evidence	Stord, NorwayHQ checked Sep 5, 2026	1,001-5,000	192
	“We are YABIMO, experts in energy, shipbuilding, and industrial areas.” Source: company website · checked Sep 5, 2026
8	NLI ASIndirect evidence	Vear, NorwayHQ checked Sep 5, 2026	201-500	129
	“NLI gruppen er en komplett leverandør av engineering, fabrikasjon, installasjons- og vedlikeholdstjenester med nøkkelkompetanse på stålkonstruksjoner, rør, overflatebehandling og…” Source: company website · checked Sep 5, 2026
9	IK GroupIndirect evidence	Stavanger, NorwayHQ checked Sep 5, 2026	51-200	123
	“IK SUBSEA - IK TOPSIDE - IK TRAX - IZOMAX - NORCLAMP Our clever use of proven technology makes your flowlines and pipelines run safely and profitably.” Source: company website · checked Sep 5, 2026
10	Island Drilling Company ASPartial evidence	Sandsli, NorwayHQ checked Sep 5, 2026	51-200	114
	“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: company website · checked Sep 5, 2026
11	Techouse ASStrong evidence	Sandnes, NorwayHQ checked Sep 5, 2026	51-200	106
	“Techouse is a leader in the provision of offshore platform processing equipment and services to the international oil & gas industry.” Source: company website · checked Sep 5, 2026
12	NYMOIndirect evidence	Grimstad, NorwayHQ checked Sep 5, 2026	201-500	105
	“Nymo is a full-service engineering, procurement and construction company within the oil & gas and process industry.” Source: company website · checked Sep 5, 2026
13	Westcon Yards ASPartial evidence	Vindafjord, NorwayHQ checked Sep 5, 2026	201-500	103
	“Westcon Yards AS is a modern shipyard with a main focus on offshore service, shipbuilding, rig and ship repair.” Source: company website · checked Sep 5, 2026
14	HavframStrong evidence	Oslo, NorwayHQ checked Sep 5, 2026	51-200	88
	“Havfram is a pure play offshore wind company, providing transport and installation services to the offshore wind sector as an owner and operator of Wind Turbine Installation…” Source: company website · checked Sep 5, 2026
15	Marine Aluminium ASPartial evidence	Avaldsnes, NorwayHQ checked Sep 5, 2026	51-200	79
	“Marine Aluminium AS (MA) is one of the world’s leading companies within engineering, design and fabrication of aluminium structures and products for the offshore and shipbuilding…” Source: company website · checked Sep 5, 2026
16	Moss MaritimePartial evidence	Lysaker, NorwayHQ checked Sep 5, 2026	51-200	65
	“Moss Maritime provides leading technology and expertise within design and engineering services to the offshore energy sector as well as other ocean-based sectors.” Source: company website · checked Sep 5, 2026
17	KANFAIndirect evidence	Lysaker, NorwayHQ checked Sep 5, 2026	51-200	60
	“KANFA is an independent process design and engineering company that delivers process modules and services to the global energy market with focus on small to medium scale…” Source: company website · checked Sep 5, 2026
18	Technip India LimitedIndirect evidence	Sandvika, NorwayHQ checked Sep 5, 2026	51-200	59
	Source: company website · checked Sep 5, 2026
19	Semar ASPartial evidence	Lysaker, NorwayHQ checked Sep 5, 2026	11-50	52
	“Semar was founded in 1980 as an independent engineering consultant firm devoted primarily to the offshore oil and gas industry.” Source: company website · checked Sep 5, 2026
20	AragonIndirect evidence	Bergen, NorwayHQ checked Sep 5, 2026	51-200	51
	“Aragon is a leading engineering and EPC (Engineering, Procurement, and Construction) company headquartered in Bergen, Norway offering environmentally sound systems and solutions…” Source: company website · checked Sep 5, 2026
21	Petrolink ASStrong evidence	NorwayHQ checked Sep 5, 2026	51-200	50
	“Petrolink operates platforms, subsea installations and floating production units offshore, oil and gas terminals onshore, refineries and process plants including power plants and…” Source: company website · checked Sep 5, 2026
22	Subseadesign ASIndirect evidence	Lierbyen, NorwayHQ checked Sep 5, 2026	51-200	47
	“SubseaDesign (SD) is an engineering, design and fabrication company providing equipment and services for the oil and gas industry.” Source: company website · checked Sep 5, 2026
23	TratecPartial evidence	Kristiansand, NorwayHQ checked Sep 5, 2026	201-500	42
	“Tratec is a supplier of technical solutions within electrical, automation, mechanical and piping to the offshore & marine, process industry and construction market.” Source: company website · checked Sep 5, 2026
24	Reinertsen ASIndirect evidence	Trondheim, NorwayHQ checked Sep 5, 2026	501-1,000	41
	“REINERTSEN AS ble etablert i 1946 og er i dag et leverandørselskap innenfor olje & gass, samt ny energi.” Source: company website · checked Sep 5, 2026
25	Randaberg IndustriesIndirect evidence	Randaberg, NorwayHQ checked Sep 5, 2026	51-200	40
	“Fabrication of complex industrial products with deep-water quay for ships and rigs.” Source: company website · checked Sep 5, 2026

Showing 25 of 114 offshore platform installation companies based in Norway

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Offshore platform installation companies based in Norway at a glance

As of Sep 5, 2026

11-50Median size (employees)

StavangerLargest hub · 19 HQs

256Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Verified emails by last verification

0–30

1,769

31–60

106

61–90

90–180

180+

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 platform installation companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Norway whose own description of what they do matches “offshore platform installation companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among offshore platform installation 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 an evidence 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, 1,934 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 5, 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

How many offshore platform installation companies are there based in Norway?

RevenueBase identified 114 offshore platform installation 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?

BW Offshore, headquartered in Oslo, tops this list with the largest team on record.

Which city has the most offshore platform installation companies?

Stavanger leads with 19 headquartered companies, followed by Oslo (11) and Haugesund (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 1,934 verified decision-maker contacts tracked across these 114 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 5, 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.