Company lists · Data refreshed September 2026

Top 25 Semi-submersible rig operators based in Norway

Name: Semi-submersible rig operators based in Norway
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 84 companies tracked

RevenueBase identified 84 semi-submersible rig operators headquartered in Norway as of September 2026 and tracks 13,765 professional contacts across them, including 3,702 with verified work emails. Stavanger is the largest hub.

This list covers semi-submersible rig operators 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

84Companies

13,765Contacts tracked

3,702Verified emails

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The 25 largest semi-submersible rig operators based in Norway

Ranked by team size

Top 25 of 84 semi-submersible rig operators 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 semi-submersible rig operators: 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	Indirect evidence	Bergen, NorwayHQ checked Sep 22, 2026	5,001-10,000	2,942 contacts →
	Indirect 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	Archer	Indirect evidence	Sandnes, NorwayHQ checked Sep 22, 2026	5,001-10,000	2,373 contacts →
	Indirect evidence “Archer is a company providing drilling and well services to the global energy industry.” Source: RevenueBase Database · checked Sep 22, 2026
3	Solstad	Indirect evidence	Skudeneshavn, NorwayHQ checked Sep 22, 2026	1,001-5,000	1,625 contacts →
	Indirect evidence “Solstad is a company with more than 60 years of experience within various shipping segments, and is currently one of the leading provider of specialized offshore tonnage to the…” Source: RevenueBase Database · checked Sep 22, 2026
4	Prosafe	Strong evidence	N-4068 Stavanger, NorwayHQ checked Sep 22, 2026	n/a	630 contacts →
	Strong evidence “Prosafe is a leading owner and operator of semi-submersible accommodation vessels.” Source: RevenueBase Database · checked Sep 22, 2026
5	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
6	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
7	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
8	Reach Subsea	Indirect evidence	Haugesund, NorwayHQ checked Sep 22, 2026	201-500	454 contacts →
	Indirect 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	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
11	Akofs Offshore	Indirect evidence	Oslo, NorwayHQ checked Sep 22, 2026	201-500	233 contacts →
	Indirect 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
12	Enhanced Drilling	Indirect evidence	Straume, NorwayHQ checked Sep 22, 2026	51-200	194 contacts →
	Indirect evidence “Innovative, enabling technology is at the very heart of Enhanced Drilling.” Source: RevenueBase Database · checked Sep 22, 2026
13	Vestland Offshore AS	Indirect evidence	Austevoll, NorwayHQ checked Sep 22, 2026	n/a	154 contacts →
	Indirect evidence “Vestland Offshore AS is a worldwide shipping company within the offshore oil & gas and renewable industry.” Source: RevenueBase Database · checked Sep 22, 2026
14	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
15	Havila Subsea & Renewables	Indirect evidence	Aalesund, NorwayHQ checked Sep 22, 2026	201-500	120 contacts →
	Indirect 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
16	Island Drilling Company AS	Strong evidence	Sandsli, NorwayHQ checked Sep 22, 2026	51-200	114 contacts →
	Strong 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
17	Macro Offshore	Strong evidence	Sandnes, NorwayHQ checked Sep 22, 2026	51-200	91 contacts →
	Strong evidence “Macro Offshore, is a fully integrated owner and operator of accommodation vessels with a fleet of two harsh-environment deep-water accommodation jack-up rigs, Haven and Crossway…” Source: RevenueBase Database · checked Sep 22, 2026
18	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
19	FØN Energy Services	Indirect evidence	Fornebu, NorwayHQ checked Sep 22, 2026	51-200	78 contacts →
	Indirect evidence “Føn Energy Services is an independent service provider to the offshore energy sector.” Source: RevenueBase Database · checked Sep 22, 2026
20	Moss Maritime	Indirect evidence	Lysaker, NorwayHQ checked Sep 22, 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 22, 2026
21	Siem Offshore	Indirect evidence	NorwayHQ checked Sep 22, 2026	1,001-5,000	64 contacts →
	Indirect evidence “Siem Offshore offers a dedicated and skilled workforce.” Source: RevenueBase Database · checked Sep 22, 2026
22	SUB SEA Services AS	Indirect evidence	Stavanger, NorwayHQ checked Sep 22, 2026	51-200	52 contacts →
	Indirect evidence “Sub Sea Services is a solution-focused, flexible and collaboration oriented partner to the offshore drilling industry.” Source: RevenueBase Database · checked Sep 22, 2026
23	Subseadesign AS	Indirect evidence	Lierbyen, NorwayHQ checked Sep 22, 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 22, 2026
24	Remøy Shipping AS	Indirect evidence	Fosnavag, NorwayHQ checked Sep 22, 2026	51-200	45 contacts →
	Indirect evidence “Remøy Shipping is a fully integrated shipping company and has its main activity within the oil and gas industry since the beginning of the 1980s.” Source: RevenueBase Database · checked Sep 22, 2026
25	Subseapartner AS	Indirect evidence	Haugesund, NorwayHQ checked Sep 22, 2026	11-50	44 contacts →
	Indirect evidence “SubseaPartner is a leading diving contractor in the shallow-deep segment.” 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: semi-submersible rig operators. 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 semi-submersible rig operators.
Partial evidence: Its own public description names part of semi-submersible rig operators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name semi-submersible rig operators. 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 84 semi-submersible rig operators based in Norway

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Semi-submersible rig operators based in Norway at a glance

As of Sep 22, 2026

26.9%Verified-email coverage

163.9Average contacts per company

11-50Median size (employees)

13.1%Largest-city concentration · Stavanger

Sep 22, 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

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 84 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 semi-submersible rig operators, 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 “semi-submersible rig operators”. 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 semi-submersible rig operators), 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 semi-submersible rig operators, 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, 3,702 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 semi-submersible rig operators, 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 semi-submersible rig operators are there based in Norway?

RevenueBase identified 84 semi-submersible rig operators 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 semi-submersible rig operators?

Stavanger leads with 11 headquartered companies, followed by Kristiansand (7) and Haugesund (5).

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 3,702 verified decision-maker contacts tracked across these 84 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.