Company lists · Data refreshed September 2026

Top 25 Deep sea exploration companies based in Norway

Name: Deep sea exploration companies based in Norway
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 73 companies tracked

RevenueBase identified 73 deep sea exploration companies headquartered in Norway as of September 2026 and tracks 7,460 professional contacts across them, including 2,505 with verified work emails. Oslo is the largest hub.

This list covers deep sea exploration 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 19, 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 19, 2026 86% judged on-target in blind review

73Companies

7,460Contacts tracked

2,505Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest deep sea exploration companies based in Norway

Ranked by team size

Top 25 of 73 deep sea exploration companies based in Norway, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to deep sea exploration 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	Indirect evidence	Bergen, NorwayHQ checked Sep 19, 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 19, 2026
2	Shearwater Geoservices	Indirect evidence	Laksevåg, NorwayHQ checked Sep 19, 2026	1,001-5,000	1,031 contacts →
	Indirect evidence “Shearwater is a global marine geoscience and technology business.” Source: RevenueBase Database · checked Sep 19, 2026
3	Kongsberg Discovery	Partial evidence	Horten, NorwayHQ checked Sep 19, 2026	1,001-5,000	638 contacts →
	Partial evidence “In a constantly changing market environment, Kongsberg Discovery is serving the ocean space from the deepest sea to the outer space.” Source: RevenueBase Database · checked Sep 19, 2026
4	Island Offshore	Indirect evidence	Ulsteinvik, NorwayHQ checked Sep 19, 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 19, 2026
5	Reach Subsea	Indirect evidence	Haugesund, NorwayHQ checked Sep 19, 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 19, 2026
6	Eidesvik Offshore ASA	Indirect evidence	Langevag, NorwayHQ checked Sep 19, 2026	501-1,000	308 contacts →
	Indirect evidence “Offshore Shipping Company.” Source: RevenueBase Database · checked Sep 19, 2026
7	REM Offshore	Indirect evidence	Fosnavåg, NorwayHQ checked Sep 19, 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 19, 2026
8	Olympic Subsea ASA	Partial evidence	Fosnavåg Brygge 2.etg, NorwayHQ checked Sep 19, 2026	501-1,000	201 contacts →
	Partial 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 19, 2026
9	Seabird Exploration	Partial evidence	Bergen, NorwayHQ checked Sep 19, 2026	501-1,000	194 contacts →
	Partial 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 19, 2026
10	Havila Subsea & Renewables	Indirect evidence	Aalesund, NorwayHQ checked Sep 19, 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 19, 2026
11	Maritime Robotics AS	Indirect evidence	Trondheim, NorwayHQ checked Sep 19, 2026	51-200	79 contacts →
	Indirect evidence “We are a global leader and pioneer in advanced maritime drones (USVs) and maritime autonomy.” Source: RevenueBase Database · checked Sep 19, 2026
12	ARGEO	Indirect evidence	Asker, NorwayHQ checked Sep 19, 2026	51-200	71 contacts →
	Indirect evidence “Argeo was established by an experienced team of professionals in 2017 with HQ in Asker, Norway.” Source: RevenueBase Database · checked Sep 19, 2026
13	Mohn Drilling AS	Indirect evidence	Bønes, NorwayHQ checked Sep 19, 2026	11-50	44 contacts →
	Indirect evidence “Mohn Drilling AS is a diving and ROV contractor based in Bergen, Norway, and the main area of activity is offshore Tierra del Fuego, Argentina.” Source: RevenueBase Database · checked Sep 19, 2026
14	Swire Seabed	Indirect evidence	Bergen, NorwayHQ checked Sep 19, 2026	51-200	40 contacts →
	Indirect evidence “Swire Seabed provides a highly flexible range of integrated subsea services to the global Oil & Gas and renewables industries.” Source: RevenueBase Database · checked Sep 19, 2026
15	Allton	Partial evidence	Sandnes, NorwayHQ checked Sep 19, 2026	11-50	25 contacts →
	Partial evidence “Allton is a Technology & Service company that specialises in Ocean Bottom Node data acquisition for Hydrocarbon Exploration and Production (E&P), CO2 Measurement Monitoring and…” Source: RevenueBase Database · checked Sep 19, 2026
16	Techno Dive	Indirect evidence	Avaldsnes, NorwayHQ checked Sep 19, 2026	11-50	25 contacts →
	Indirect evidence “Techno Dive is your partner for Safe and Efficient Subsea Work.” Source: RevenueBase Database · checked Sep 19, 2026
17	Sjøentreprenøren AS	Indirect evidence	Bergen, NorwayHQ checked Sep 19, 2026	11-50	22 contacts →
	Indirect evidence “Vi utfører oppdrag innen mudring, sprenging, riving, konstruksjon, inspeksjon og mye mer under vann.” Source: RevenueBase Database · checked Sep 19, 2026
18	Submara Prosjekt AS	Indirect evidence	Tofte, NorwayHQ checked Sep 19, 2026	11-50	21 contacts →
	Indirect evidence “Dykkerteknikk AS ble etablert i 1976 og er et godt etablert selskap innen undervannsarbeid og marine operasjoner.” Source: RevenueBase Database · checked Sep 19, 2026
19	Deep C	Partial evidence	Kristiansund, NorwayHQ checked Sep 19, 2026	11-50	21 contacts →
	Partial evidence “Deep C provides Seabed Intervention Services that simply fit together.” Source: RevenueBase Database · checked Sep 19, 2026
20	AVA Ocean	Indirect evidence	Ålesund, NorwayHQ checked Sep 19, 2026	11-50	20 contacts →
	Indirect evidence “Our revolutionary technology for non-invasive, precision seabed harvesting not only preserves, but can also help to revitalise fragile and often overlooked ecosystems at the…” Source: RevenueBase Database · checked Sep 19, 2026
21	Fsubsea	Indirect evidence	Oslo, NorwayHQ checked Sep 19, 2026	11-50	20 contacts →
	Indirect evidence “FSubsea is a Norwegian ocean technology company focused on climate-smart subsea desalination systems, as well as robust subsea pumping systems for a variety of energy and green…” Source: RevenueBase Database · checked Sep 19, 2026
22	Valen Marina AS	Indirect evidence	Kolltveit, NorwayHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “Valen Marina AS er en sjøentreprenør som har sitt virke innenfor dykke- og ROV tjenester.” Source: RevenueBase Database · checked Sep 19, 2026
23	Eelume AS	Indirect evidence	Trondheim, NorwayHQ checked Sep 19, 2026	11-50	17 contacts →
	Indirect evidence “Eelume is a leading provider of innovative underwater technology solutions.” Source: RevenueBase Database · checked Sep 19, 2026
24	General Oceans	Indirect evidence	Oslo, NorwayHQ checked Sep 19, 2026	201-500	14 contacts →
	Indirect evidence “General Oceans is a global group of companies dedicated to providing advanced underwater technology including sensors, systems and robotic solutions.” Source: RevenueBase Database · checked Sep 19, 2026
25	Mohn Technology AS	Indirect evidence	Laksevåg, NorwayHQ checked Sep 19, 2026	1-10	8 contacts →
	Indirect evidence “Specialists in underwater technology and machine vision” Source: RevenueBase Database · checked Sep 19, 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: deep sea exploration 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 deep sea exploration companies.
Partial evidence: Its own public description names part of deep sea exploration companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name deep sea exploration 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 73 deep sea exploration companies based in Norway

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,505 reachable decision-makers.

Free signup · no credit card

View the full list →

Deep sea exploration companies based in Norway at a glance

As of Sep 19, 2026

33.6%Verified-email coverage

102.2Average contacts per company

11-50Median size (employees)

13.7%Largest-city concentration · Oslo

Sep 19, 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 73 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 deep sea exploration 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 “deep sea exploration 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 deep sea exploration 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 deep sea exploration 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, 2,505 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 19, 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 deep sea exploration 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 deep sea exploration companies are there based in Norway?

RevenueBase identified 73 deep sea exploration 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 deep sea exploration companies?

Oslo leads with 10 headquartered companies, followed by Bergen (7) and Trondheim (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 2,505 verified decision-maker contacts tracked across these 73 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 19, 2026.

Ready to reach these companies? Verified emails and direct dials for all 73 deep sea exploration companies based in Norway. Start with a free account, no credit card.

Download this list →

Related lists

Deep sea exploration companies by geography

Browse the directory

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.