Company lists · Data refreshed September 2026

Top 25 Offshore platform operators based in the United Kingdom

Name: Offshore platform operators based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 109 companies tracked

RevenueBase identified 109 offshore platform operators headquartered in the United Kingdom as of September 2026 and tracks 19,565 professional contacts across them, including 3,470 with verified work emails and 2,336 with mobile numbers. London is the largest hub.

This list covers offshore platform operators headquartered in the United Kingdom, 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

109Companies

19,565Contacts tracked

3,470Verified emails

2,336Mobile numbers

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The 25 largest offshore platform operators based in the United Kingdom

Ranked by team size

Top 25 of 109 offshore platform operators based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names offshore platform operators: 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	Ensco PLCIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	5,001-10,000	2,679
	“We Are Valaris With decades of expertise and strategic commitment built on efficiency, capability and ingenuity, our sights are continually set toward a future built with purpose…” Source: company website · checked Sep 5, 2026
2	Odfjell DrillingIndirect evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	1,001-5,000	1,864
	“Odfjell Drilling is an international drilling company with around 1,500 employees with operations around the world.” Source: company website · checked Sep 5, 2026
3	Borr DrillingPartial evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	1,699
	“Borr Drilling Limited is an offshore shallow-water drilling contractor providing worldwide offshore drilling services to the oil and gas industry.” Source: company website · checked Sep 5, 2026
4	HuntingIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	1,211
	“HUNTING is an energy services provider to the world's leading national and international oil and gas companies, manufacturing and distributing products that enable the extraction…” Source: company website · checked Sep 5, 2026
5	Altera InfrastructurePartial evidence	Aberdeenshire, United KingdomHQ checked Sep 5, 2026	501-1,000	955
	“Altera Infrastructure is a leading global energy infrastructure services group focused on the ownership and operation of offshore energy assets.” Source: company website · checked Sep 5, 2026
6	Dolphin DrillingPartial evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	201-500	694
	“Dolphin Drilling is the offshore drilling pioneer of the past and for the future.” Source: company website · checked Sep 5, 2026
7	EnergeanIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	587
	“Established in 2007, Energean is a London-listed FTSE 250 and Tel Aviv-listed TA-90 E&P company with operations in the Europe, Middle East and Africa (“EMEA”) region.” Source: company website · checked Sep 5, 2026
8	Swire Oilfield ServicesPartial evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	501-1,000	202
	“Swire Energy Services, part of the global conglomerate, the Swire group, is the world's largest supplier of specialist offshore cargo carrying units to the global energy industry…” Source: company website · checked Sep 5, 2026
9	FletcherStrong evidence	Portlethen, United KingdomHQ checked Sep 5, 2026	201-500	184
	“Fletcher operate and manage a modern fleet of Offshore Platform Supply Vessels, employing over 300 people to support our operations.” Source: company website · checked Sep 5, 2026
10	Aquaterra EnergyPartial evidence	Norwich, United KingdomHQ checked Sep 5, 2026	51-200	167
	“Aquaterra Energy provides intelligently engineered products and services for well access and offshore developments - supporting efficient operations across the full life cycle of…” Source: company website · checked Sep 5, 2026
11	Njord Offshore LTDIndirect evidence	Tendring, United KingdomHQ checked Sep 5, 2026	11-50	137
	Source: company website · checked Sep 5, 2026
12	Interocean Marine ServicesPartial evidence	Portlethen, United KingdomHQ checked Sep 5, 2026	51-200	134
	“Interocean provide a comprehensive range of services to the offshore oil and gas, marine, and renewable sectors.” Source: company website · checked Sep 5, 2026
13	Hobark International LimitedIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	113
	“Hobark International Limited (HIL) is an Integrated Services Company whose subsidiaries: DrillPet International Limited (DIL), Uniterm Nigeria Limited (UNL), UltiProc Nigeria…” Source: company website · checked Sep 5, 2026
14	Derrick Services UK LTDIndirect evidence	Great Yarmouth, United KingdomHQ checked Sep 5, 2026	51-200	111
	“Derrick Service UK Ltd (DSL) is a diversified oil & gas construction company which provides a broad range of products and services to the market from our Worldwide locations.” Source: company website · checked Sep 5, 2026
15	Awilco DrillingIndirect evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	51-200	88
	“Awilco Drilling Limited was incorporated in December 2009 in connection with the acquisition of the two semi submersible drilling rigs, WilPhoenix (previously Arctic II) and…” Source: company website · checked Sep 5, 2026
16	RDSIndirect evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	1,001-5,000	70
	“RDS is an engineering specialist working for oil and gas companies and major topsides and drilling contractors.” Source: company website · checked Sep 5, 2026
17	Aventus EnergyIndirect evidence	Alness, United KingdomHQ checked Sep 5, 2026	11-50	57
	“Aventus Energy Ltd is a recently formed Scottish Highland based company operating from our bespoke premises in Alness.” Source: company website · checked Sep 5, 2026
18	AfslowestoftIndirect evidence	Lowestoft, United KingdomHQ checked Sep 5, 2026	51-200	54
	“AFS Ltd is an independently owned manufacturing company.” Source: company website · checked Sep 5, 2026
19	Crondall EnergyPartial evidence	Southampton, United KingdomHQ checked Sep 5, 2026	11-50	50
	“Crondall Energy is an independent offshore energy consultancy specialising in floating and subsea facilities.” Source: company website · checked Sep 5, 2026
20	Indepth InternationalPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	30
	“Our global organic talent allows us to deliver specialized knowledge and solutions for offshore operations to our clients around the world.” Source: company website · checked Sep 5, 2026
21	AOTIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	12
	“AOT is an energy services company serving our customers with oilfield products and services and support the industry in the energy transition.” Source: company website · checked Sep 5, 2026
22	EOS Europe LTDPartial evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	11-50	11
	“EOS Europe Ltd (EOS) deliver a range of specialist services to the oil and gas industry, specifically focusing on the offshore drilling and production markets.” Source: company website · checked Sep 5, 2026
23	NR Marine ServicesPartial evidence	Caister On Sea, United KingdomHQ checked Sep 5, 2026	11-50	10
	“NR Marine Services own and operate crew transfer vessels / workboats available to charter in the Offshore industry.” Source: company website · checked Sep 5, 2026
24	SeaplantPartial evidence	Fleetwood, United KingdomHQ checked Sep 5, 2026	1-10	7
	“We are an influential and dedicated magazine and website helping to promote companies in offshore and marine related equipment & services.” Source: company website · checked Sep 5, 2026
25	Amplus Energy Services LimitedIndirect evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	1-10	6
	Source: company website · checked Sep 5, 2026

Showing 25 of 109 offshore platform operators based in the United Kingdom

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Offshore platform operators based in the United Kingdom at a glance

As of Sep 5, 2026

11-50Median size (employees)

LondonLargest hub · 25 HQs

2,336Contacts 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

5,001-10,000

Verified emails by last verification

0–30

3,220

31–60

196

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 operators, 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 the United Kingdom whose own description of what they do matches “offshore platform operators”. 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 operators, and records with no verified work email. Companies headquartered outside United Kingdom 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, 3,470 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.

Offshore platform operators by metro

Offshore platform operators in London25

Frequently asked

How many offshore platform operators are there based in the United Kingdom?

RevenueBase identified 109 offshore platform operators headquartered in the United Kingdom 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?

Ensco PLC, headquartered in London, tops this list with the largest team on record.

Which city has the most offshore platform operators?

London leads with 25 headquartered companies, followed by Aberdeen (23) and Portlethen (3).

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 3,470 verified decision-maker contacts tracked across these 109 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.