Company lists · Data refreshed September 2026

Top 14 Port and harbor construction companies based in the United Kingdom

Name: Port and harbor construction companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 36 companies tracked

RevenueBase identified 36 port and harbor construction companies headquartered in the United Kingdom as of September 2026 and tracks 578 professional contacts across them, including 244 with verified work emails. Fareham is the largest hub.

This list covers port and harbor construction companies 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 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 17, 2026 86% judged on-target in blind review

36Companies

578Contacts tracked

244Verified emails

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The 14 largest port and harbor construction companies based in the United Kingdom

Ranked by team size

Top 14 of 36 port and harbor construction companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to port and harbor construction 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	Mackley	Partial evidence	Small Dole, United KingdomHQ checked Sep 17, 2026	51-200	116 contacts →
	Partial evidence “Mackley provides a comprehensive range of services from conception through construction to project delivery.” Source: RevenueBase Database · checked Sep 17, 2026
2	Foundocean	Partial evidence	Livingston, United KingdomHQ checked Sep 17, 2026	51-200	85 contacts →
	Partial evidence “FoundOcean boasts 60 years’ experience of providing green and brown field services to the marine construction industries.” Source: RevenueBase Database · checked Sep 17, 2026
3	GPS Marine Contractors LTD	Partial evidence	Rochester, United KingdomHQ checked Sep 17, 2026	51-200	44 contacts →
	Partial evidence “Marine Contractors specialising in: Marine Civil Engineering and Construction.” Source: RevenueBase Database · checked Sep 17, 2026
4	Southbay Civil Engineering LTD	Indirect evidence	Gateshead, United KingdomHQ checked Sep 17, 2026	51-200	43 contacts →
	Indirect evidence “Over the last 20 years Southbay has developed a reputation as one of the UK’s leading maritime civil engineering contractors, undertaking technically challenging projects within…” Source: RevenueBase Database · checked Sep 17, 2026
5	Beckett Rankine	Indirect evidence	Westminster, United KingdomHQ checked Sep 17, 2026	11-50	39 contacts →
	Indirect evidence “Beckett Rankine is the UK's leading maritime engineering consultancy.” Source: RevenueBase Database · checked Sep 17, 2026
6	Wallace Stone LLP	Indirect evidence	Dingwall, United KingdomHQ checked Sep 17, 2026	11-50	18 contacts →
	Indirect evidence “Wallace Stone (formerly Wallace Stone & Partners) was established in 1973 and is a member of the Association for Consultancy and Engineering.” Source: RevenueBase Database · checked Sep 17, 2026
7	Walcon Marine Limited	Indirect evidence	Fareham, United KingdomHQ checked Sep 17, 2026	11-50	14 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
8	Scrabster Harbour	Strong evidence	Caithness, United KingdomHQ checked Sep 17, 2026	11-50	10 contacts →
	Strong evidence “Scrabster Harbour Trust operates a multi-purpose port on the north coast of Scotland.” Source: RevenueBase Database · checked Sep 17, 2026
9	A2 Maritime	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	8 contacts →
	Indirect evidence “We will not over-promise or under-deliver.” Source: RevenueBase Database · checked Sep 17, 2026
10	Geoseacore	Indirect evidence	Helston, United KingdomHQ checked Sep 17, 2026	1-10	5 contacts →
	Indirect evidence “We provide agile solutions for complex marine challenges.” Source: RevenueBase Database · checked Sep 17, 2026
11	Ashleigh Contracts	Indirect evidence	Newtownards, United KingdomHQ checked Sep 17, 2026	11-50	3 contacts →
	Indirect evidence “Ashleigh Contracts have a long-held and well-established reputation of providing high quality projects within the field of civil engineering and in particular on marine civil…” Source: RevenueBase Database · checked Sep 17, 2026
12	RA Marine LTD	Indirect evidence	Banbury, United KingdomHQ checked Sep 17, 2026	1-10	2 contacts →
	Indirect evidence “RA Marine specialise in the fabrication, build and installation of bespoke solutions to access and enjoy water.” Source: RevenueBase Database · checked Sep 17, 2026
13	MMS Limited UK	Partial evidence	Shedfield, United KingdomHQ checked Sep 17, 2026	1-10	1 contacts →
	Partial evidence “We undertake a diverse range of marine construction, fabrication, infrastructure and civil engineering projects to meet our clients requirements.” Source: RevenueBase Database · checked Sep 17, 2026
14	Constructex Limited	Indirect evidence	Lee-on-the-solent, United KingdomHQ checked Sep 17, 2026	1-10	1 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 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: port and harbor construction 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 port and harbor construction companies.
Partial evidence: Its own public description names part of port and harbor construction companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name port and harbor construction 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 14 of 36 port and harbor construction companies based in the United Kingdom

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Port and harbor construction companies based in the United Kingdom at a glance

As of Sep 17, 2026

42.2%Verified-email coverage

16.1Average contacts per company

11-50Median size (employees)

5.6%Largest-city concentration · Fareham

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 36 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 port and harbor construction 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 the United Kingdom whose own description of what they do matches “port and harbor construction 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 port and harbor construction 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 port and harbor construction companies, 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 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, 244 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 17, 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 port and harbor construction 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 port and harbor construction companies are there based in the United Kingdom?

RevenueBase identified 36 port and harbor construction companies 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?

Mackley, headquartered in Small Dole, tops this list with the largest team on record.

Which city has the most port and harbor construction companies?

Fareham leads with 2 headquartered companies, followed by London (2) and Small Dole (2).

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 244 verified decision-maker contacts tracked across these 36 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 17, 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.