Company lists · Data refreshed September 2026

Top 25 Platform topsides installation companies based in Norway

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 61 companies tracked

RevenueBase identified 61 platform topsides installation companies headquartered in Norway as of September 2026 and tracks 2,318 professional contacts across them, including 575 with verified work emails. Stavanger is the largest hub.

This list covers platform topsides 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 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 29, 2026 86% judged on-target in blind review

61Companies

2,318Contacts tracked

575Verified emails

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The 25 largest platform topsides installation companies based in Norway

Ranked by team size

Top 25 of 61 platform topsides installation companies based in Norway, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to platform topsides installation 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	Island Offshore	Partial evidence	Ulsteinvik, NorwayHQ checked Sep 29, 2026	501-1,000	501 contacts →
	Partial 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 29, 2026
2	Linjebygg AS	Indirect evidence	Molde, NorwayHQ checked Sep 29, 2026	201-500	261 contacts →
	Indirect evidence “Linjebygg provides LIFE CYCLE EXTENSION.” Source: RevenueBase Database · checked Sep 29, 2026
3	NLI AS	Indirect evidence	Vear, NorwayHQ checked Sep 29, 2026	201-500	129 contacts →
	Indirect evidence “NLI gruppen er en komplett leverandør av engineering, fabrikasjon, installasjons- og vedlikeholdstjenester med nøkkelkompetanse på stålkonstruksjoner, rør, overflatebehandling og…” Source: RevenueBase Database · checked Sep 29, 2026
4	IK Group	Partial evidence	Stavanger, NorwayHQ checked Sep 29, 2026	51-200	123 contacts →
	Partial evidence “IK SUBSEA - IK TOPSIDE - IK TRAX - IZOMAX - NORCLAMP Our clever use of proven technology makes your flowlines and pipelines run safely and profitably.” Source: RevenueBase Database · checked Sep 29, 2026
5	Island Drilling Company AS	Indirect evidence	Sandsli, NorwayHQ checked Sep 29, 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 29, 2026
6	Techouse AS	Partial evidence	Sandnes, NorwayHQ checked Sep 29, 2026	51-200	106 contacts →
	Partial 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 29, 2026
7	NYMO	Indirect evidence	Grimstad, NorwayHQ checked Sep 29, 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 29, 2026
8	TCO AS	Partial evidence	Indre Arna, NorwayHQ checked Sep 29, 2026	51-200	103 contacts →
	Partial evidence “TCO is a Norwegian founded global oilfield service company, which specialises in the design, manufacture and installation of glass barrier plugs, chemical injection systems and…” Source: RevenueBase Database · checked Sep 29, 2026
9	Moss Maritime	Indirect evidence	Lysaker, NorwayHQ checked Sep 29, 2026	51-200	65 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 29, 2026
10	KANFA	Indirect evidence	Lysaker, NorwayHQ checked Sep 29, 2026	51-200	60 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 29, 2026
11	Semar AS	Indirect evidence	Lysaker, NorwayHQ checked Sep 29, 2026	11-50	52 contacts →
	Indirect evidence “Semar was founded in 1980 as an independent engineering consultant firm devoted primarily to the offshore oil and gas industry.” Source: RevenueBase Database · checked Sep 29, 2026
12	Petrolink AS	Strong evidence	NorwayHQ checked Sep 29, 2026	51-200	50 contacts →
	Strong evidence “Petrolink operates platforms, subsea installations and floating production units offshore, oil and gas terminals onshore, refineries and process plants including power plants and…” Source: RevenueBase Database · checked Sep 29, 2026
13	Subseadesign AS	Indirect evidence	Lierbyen, NorwayHQ checked Sep 29, 2026	51-200	47 contacts →
	Indirect evidence “SubseaDesign (SD) is an engineering, design and fabrication company providing equipment and services for the oil and gas industry.” Source: RevenueBase Database · checked Sep 29, 2026
14	Tratec	Indirect evidence	Kristiansand, NorwayHQ checked Sep 29, 2026	201-500	42 contacts →
	Indirect evidence “Tratec is a supplier of technical solutions within electrical, automation, mechanical and piping to the offshore & marine, process industry and construction market.” Source: RevenueBase Database · checked Sep 29, 2026
15	Reinertsen AS	Indirect evidence	Trondheim, NorwayHQ checked Sep 29, 2026	501-1,000	41 contacts →
	Indirect evidence “REINERTSEN AS ble etablert i 1946 og er i dag et leverandørselskap innenfor olje & gass, samt ny energi.” Source: RevenueBase Database · checked Sep 29, 2026
16	Omega 365 Protek	Indirect evidence	Haugesund, NorwayHQ checked Sep 29, 2026	51-200	34 contacts →
	Indirect evidence “Omega 365 Protek er et entrepriseselskap som leverer prosjektering og gjennomføring av både offshore og landbaserte industriprosjekter.” Source: RevenueBase Database · checked Sep 29, 2026
17	Dwellop Group	Partial evidence	Stavanger, NorwayHQ checked Sep 29, 2026	51-200	31 contacts →
	Partial evidence “Dwellop Group is an independent Norwegian company delivering topside handling equipment for Well Intervention, WorkOver and P&A operations.” Source: RevenueBase Database · checked Sep 29, 2026
18	Envirex AS	Indirect evidence	Bryne, NorwayHQ checked Sep 29, 2026	11-50	28 contacts →
	Indirect evidence “Envirex’ engineering expertise delivers a wide range of products, systems and services for the subsea oil and gas industry.” Source: RevenueBase Database · checked Sep 29, 2026
19	Wellpartner AS	Indirect evidence	Tananger, NorwayHQ checked Sep 29, 2026	51-200	23 contacts →
	Indirect evidence “WellPartner AS is a service company that delivers technical expertise and high quality equipment and services within subsea drilling, completion and intervention operations.” Source: RevenueBase Database · checked Sep 29, 2026
20	Noble Installation AS	Partial evidence	Rudskogen, NorwayHQ checked Sep 29, 2026	51-200	23 contacts →
	Partial evidence “Om NOBLE INSTALLATION AS: Heleid datterselskap av Noble AS, etablert i Vår virksomhet er innenfor marine operasjoner, offshore installasjon, mekanisk montasje og produksjon.” Source: RevenueBase Database · checked Sep 29, 2026
21	Seasystems AS	Indirect evidence	Vestby, NorwayHQ checked Sep 29, 2026	11-50	22 contacts →
	Indirect evidence “The company is located at Vestby, about 40 kilometer outside Oslo City.” Source: RevenueBase Database · checked Sep 29, 2026
22	Fabtech AS	Indirect evidence	Ågotnes, NorwayHQ checked Sep 29, 2026	11-50	20 contacts →
	Indirect evidence “A NEW SPARK IN STEEL WELDING Fabtech is a fabricator of pipe systems and steel structures.” Source: RevenueBase Database · checked Sep 29, 2026
23	Moreld	Partial evidence	Stavanger, NorwayHQ checked Sep 29, 2026	1,001-5,000	17 contacts →
	Partial evidence “Moreld is an industrial multi-disciplinary engineering group offering full-scope services across the offshore energy and marine industries including subsea installations.” Source: RevenueBase Database · checked Sep 29, 2026
24	JOTNE	Indirect evidence	Oslo, NorwayHQ checked Sep 29, 2026	201-500	11 contacts →
	Indirect evidence “Jotne supply engineering and fabrication services to the Oil & Gas market and Industry.” Source: RevenueBase Database · checked Sep 29, 2026
25	Engineering IDS	Indirect evidence	Hinna, NorwayHQ checked Sep 29, 2026	11-50	10 contacts →
	Indirect evidence “Engineering IDS is an engineering company specializing in offshore technology, concept design, marine services and crane inspections.” Source: RevenueBase Database · checked Sep 29, 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: platform topsides installation 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 platform topsides installation companies.
Partial evidence: Its own public description names part of platform topsides installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name platform topsides installation 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 61 platform topsides installation companies based in Norway

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Platform topsides installation companies based in Norway at a glance

As of Sep 29, 2026

24.8%Verified-email coverage

38.0Average contacts per company

11-50Median size (employees)

19.7%Largest-city concentration · Stavanger

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 61 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 platform topsides installation 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 “platform topsides installation 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 platform topsides installation 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 platform topsides 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 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, 575 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 29, 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 platform topsides installation 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 platform topsides installation companies are there based in Norway?

RevenueBase identified 61 platform topsides 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?

Island Offshore, headquartered in Ulsteinvik, tops this list with the largest team on record.

Which city has the most platform topsides installation companies?

Stavanger leads with 12 headquartered companies, followed by Lysaker (4) and Oslo (4).

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 575 verified decision-maker contacts tracked across these 61 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 29, 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.