Company lists · Data refreshed September 2026

Top 25 Maritime defense technology companies based in the United Kingdom

Name: Maritime defense technology 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 47 companies tracked

RevenueBase identified 47 maritime defense technology companies headquartered in the United Kingdom as of September 2026 and tracks 13,247 professional contacts across them, including 1,547 with verified work emails. London is the largest hub.

This list covers maritime defense technology 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

47Companies

13,247Contacts tracked

1,547Verified emails

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The 25 largest maritime defense technology companies based in the United Kingdom

Ranked by team size

Top 25 of 47 maritime defense technology 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 maritime defense technology 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	Systems Engineering & Assessment LTD	Partial evidence	Beckington, United KingdomHQ checked Sep 17, 2026	201-500	392 contacts →
	Partial evidence “For over 60 years, SEA has delivered research, development, manufacturing, training, and support of complex maritime systems to the Royal Navy, international partners, and…” Source: RevenueBase Database · checked Sep 17, 2026
2	JFD Global	Indirect evidence	Westhill, United KingdomHQ checked Sep 17, 2026	1,001-5,000	387 contacts →
	Indirect evidence “Confidence under pressure.” Source: RevenueBase Database · checked Sep 17, 2026
3	Sperry Marine	Strong evidence	New Malden, United KingdomHQ checked Sep 17, 2026	201-500	279 contacts →
	Strong evidence “Sperry Marine provides the commercial and defence maritime industry with Navigation Solutions that excel in efficiency, reliability and safety.” Source: RevenueBase Database · checked Sep 17, 2026
4	Sonardyne International LTD	Partial evidence	Yateley, United KingdomHQ checked Sep 17, 2026	201-500	273 contacts →
	Partial evidence “Underwater innovations for energy, defence and science.” Source: RevenueBase Database · checked Sep 17, 2026
5	Mactaggart Scott	Partial evidence	Loanhead, United KingdomHQ checked Sep 17, 2026	201-500	210 contacts →
	Partial evidence “A Scottish engineering company founded in 1898, MacTaggart Scott supports the Naval Defence and Marine market.” Source: RevenueBase Database · checked Sep 17, 2026
6	Pole Star Global	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	183 contacts →
	Strong evidence “Pole Star Global is a maritime intelligence and technology solutions company, focusing on reducing risk and optimising trade efficiency.” Source: RevenueBase Database · checked Sep 17, 2026
7	Chess Dynamics	Partial evidence	Horsham, United KingdomHQ checked Sep 17, 2026	201-500	176 contacts →
	Partial evidence “Defence Leaders around the world work with Chess for market-leading, reliable defence systems.” Source: RevenueBase Database · checked Sep 17, 2026
8	Subsea Craft Limited	Partial evidence	Portsmouth, United KingdomHQ checked Sep 17, 2026	51-200	159 contacts →
	Partial evidence “Based in Portsmouth, SSC’s mission is to provide maritime and amphibious forces with the operational advantage through the accelerated research, development and delivery of…” Source: RevenueBase Database · checked Sep 17, 2026
9	SRT Marine Systems PLC	Partial evidence	Midsomer Norton, United KingdomHQ checked Sep 17, 2026	51-200	129 contacts →
	Partial evidence “SRT Marine Systems PLC is a global leader and innovator in maritime surveillance, intelligence, navigation safety and situational awareness.” Source: RevenueBase Database · checked Sep 17, 2026
10	STS Defence	Strong evidence	Gosport, United KingdomHQ checked Sep 17, 2026	51-200	120 contacts →
	Strong evidence “STS Defence, a part of the Cicor Group, is a UK-based engineering and technology company specialising in mission-critical, secure communications & networks, electronic warfare &…” Source: RevenueBase Database · checked Sep 17, 2026
11	Kelvin Hughes A Hensoldt Company	Indirect evidence	Enfield, United KingdomHQ checked Sep 17, 2026	201-500	84 contacts →
	Indirect evidence “Kelvin Hughes (A Hensoldt Company) is a global radar system solution provider meeting the surveillance, security and safety needs of the world’s critical civil infrastructure…” Source: RevenueBase Database · checked Sep 17, 2026
12	Hensoldt UK	Partial evidence	Enfield, United KingdomHQ checked Sep 17, 2026	201-500	79 contacts →
	Partial evidence “HENSOLDT UK is a world leader in manufacturing and supplying maritime navigation and surveillance radar systems.” Source: RevenueBase Database · checked Sep 17, 2026
13	Kraken Technology Group	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	76 contacts →
	Strong evidence “High-performance dual-use composite littoral platforms for defence and commercial application in the maritime industry.” Source: RevenueBase Database · checked Sep 17, 2026
14	Tods Technology	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	43 contacts →
	Strong evidence “Tods Technology is a marine defence company based in Portland, Dorset, UK, with Offices in Dorchester, Dorset, UK.” Source: RevenueBase Database · checked Sep 17, 2026
15	Marineguard Systems Limited	Partial evidence	Southampton, United KingdomHQ checked Sep 17, 2026	11-50	23 contacts →
	Partial evidence “MarineGuard is recognised as the industry leader for the integration of leading edge technology-based superyacht security.” Source: RevenueBase Database · checked Sep 17, 2026
16	Blighter	Indirect evidence	Saffron Walden, United KingdomHQ checked Sep 17, 2026	11-50	21 contacts →
	Indirect evidence “Blighter Surveillance Systems is a world leading designer and manufacturer of electronic-scanning radars and surveillance solutions.” Source: RevenueBase Database · checked Sep 17, 2026
17	KAON	Indirect evidence	Guildford, United KingdomHQ checked Sep 17, 2026	11-50	21 contacts →
	Indirect evidence “Kaon Ltd.” Source: RevenueBase Database · checked Sep 17, 2026
18	Cambridge Pixel	Strong evidence	Royston, United KingdomHQ checked Sep 17, 2026	11-50	12 contacts →
	Strong evidence “A global leader in radar, camera and sensor processing, Cambridge Pixel's technology is used in defence, security and maritime projects.” Source: RevenueBase Database · checked Sep 17, 2026
19	Marine Data Systems	Partial evidence	Newport, United KingdomHQ checked Sep 17, 2026	11-50	8 contacts →
	Partial evidence “Marine Data Systems Limited, a British multi award-winning manufacturer of marine navigation and control systems for civil, defence and government agencies.” Source: RevenueBase Database · checked Sep 17, 2026
20	Optmis LTD	Indirect evidence	Bournemouth, United KingdomHQ checked Sep 17, 2026	1-10	5 contacts →
	Indirect evidence “Optmis Ltd: 20+ years of marine engineering excellence.” Source: RevenueBase Database · checked Sep 17, 2026
21	Halo Group Security Limited	Partial evidence	Farnham, United KingdomHQ checked Sep 17, 2026	51-200	4 contacts →
	Partial evidence “Providing Marine & Land based specialist security systems for more than 30 years.@ Halo Group \| Marine Security Expert - Anti Drone - Hack Take Control - Laser Defence Systems” Source: RevenueBase Database · checked Sep 17, 2026
22	Ultra Horizon	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	4 contacts →
	Strong evidence “Ultra Horizon Ltd is a cyber security company comprised of computer scientists who design bespoke security solutions for the maritime and defence sector.” Source: RevenueBase Database · checked Sep 17, 2026
23	Ladar-Ai LTD	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	4 contacts →
	Partial evidence “At Ladar-AI Limited, we envision a complete transformation of the global maritime transport industry with swift adoption of break-through, automated ship collision avoidance and…” Source: RevenueBase Database · checked Sep 17, 2026
24	Igence Radar LTD	Indirect evidence	Malvern, United KingdomHQ checked Sep 17, 2026	1-10	2 contacts →
	Indirect evidence “Igence Radar Ltd is a small company based in Malvern and was founded in 1995 to develop and exploit models of all aspects of radar operation and performance.” Source: RevenueBase Database · checked Sep 17, 2026
25	G.U11	Partial evidence	Cambridge, United KingdomHQ checked Sep 17, 2026	1-10	1 contacts →
	Partial evidence “Machine learning for the maritime security industry” 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: maritime defense technology 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 maritime defense technology companies.
Partial evidence: Its own public description names part of maritime defense technology companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name maritime defense technology 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 47 maritime defense technology companies based in the United Kingdom

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Maritime defense technology companies based in the United Kingdom at a glance

As of Sep 17, 2026

11.7%Verified-email coverage

281.9Average contacts per company

11-50Median size (employees)

21.3%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 47 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 maritime defense technology 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 “maritime defense technology 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 maritime defense technology 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 maritime defense technology 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, 1,547 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 maritime defense technology 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 maritime defense technology companies are there based in the United Kingdom?

RevenueBase identified 47 maritime defense technology 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?

Systems Engineering & Assessment LTD, headquartered in Beckington, tops this list with the largest team on record.

Which city has the most maritime defense technology companies?

London leads with 10 headquartered companies, followed by New Malden (2) and Portsmouth (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 1,547 verified decision-maker contacts tracked across these 47 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.