Company lists · Data refreshed September 2026
Top 25 Defence companies based in the United Kingdom
RevenueBase identified 120 defence companies headquartered in the United Kingdom as of September 2026 and tracks 74,383 professional contacts across them, including 17,333 with verified work emails. London is the largest hub.
This list covers defence 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 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.
The 25 largest defence companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 39,449 contacts → | ||||
Indirect evidence “At BAE Systems, we help our customers to stay a step ahead when protecting people and national security, critical infrastructure and vital information.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 14,090 contacts → | ||||
Strong evidence “Babcock is a FTSE 100 defence company operating in our focus countries of the UK, Australasia, Canada, France and South Africa, with exports to additional markets.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 4,442 contacts → | ||||
Strong evidence “QinetiQ is an integrated global defence and security company focused on mission-led innovation.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 795 contacts → | ||||
Indirect evidence “Cobham Ltd” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 392 contacts → | ||||
Indirect 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 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 130 contacts → | ||||
Indirect evidence “ESUK is a trusted partner to the UK Armed Forces, delivering advanced technology and innovation that strengthen national security and operational advantage.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 105 contacts → | ||||
Indirect evidence “Drumgrange is an independent British engineering company, specialising in the design, development, manufacture and through-life support of electronics and communications systems.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 88 contacts → | ||||
Strong evidence “Established in 2001, Defence iQ has grown to become one of the world’s largest defence events and media organisations.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 44 contacts → | ||||
Indirect evidence “WE ARE HIRING - Instro are a rapidly evolving company with some exciting new roles available to support our growth and strategy.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 43 contacts → | ||||
Strong evidence “Shephard Group delivers trusted insight and marketing solutions to support informed decisions across the global defence ecosystem.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 33 contacts → | ||||
Strong evidence “Standing at the crossroads of designing, building, testing and deploying secure solutions for Defence.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 33 contacts → | ||||
Strong evidence “Aviation Requirements (AR) is an established Defence Consultancy providing specialist support to the UK Ministry of Defence (MoD) and Defence Sector Industries.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 22 contacts → | ||||
Strong evidence “What We Do The UK Defence Solutions Centre (UKDSC) reaches into the broad UK value chain; from the largest defence prime contractors through to the highly innovative SMEs, to…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 18 contacts → | ||||
Strong evidence “Cohort plc is an AIM listed parent company of six innovative, agile and responsive businesses operating in defence and related markets.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 18 contacts → | ||||
Strong evidence “As a trusted membership organisation, Team Defence Information (TD-Info) brings together Industry and the MOD, collaborating to optimise the value from business information…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 18 contacts → | ||||
Strong evidence “The Exsel Group is a leading independent defence technology solutions company – providing engineering solutions, technology systems and support services to Defence and Industry…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 18 contacts → | ||||
Strong evidence “Rotron Aerospace is an advanced defence technology company.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 12 contacts → | ||||
Indirect evidence “We are a small, dynamic product and services company based in Bristol, UK.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 11 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 11 contacts → | ||||
Indirect evidence “FAC enables its members to become more competitive and increase their market share through facilitating local and international trading, technology transfer and development…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 11 contacts → | ||||
Indirect evidence “Kent Modular Electronics Ltd (KME) is a UK based Company and was established in 1976.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 9 contacts → | ||||
Strong evidence “AEI Systems – SYS Group | 65+ Years of Medium-Calibre Firepower Excellence AEI Systems (UK), a valued member of the SYS Group – one of Türkiye’s top 10 defence companies – and is…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 8 contacts → | ||||
Indirect evidence “Innovating Growth and Change “A specialist with real market knowledge offering business growth expertise to companies with high value technologies and services who wish to expand…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
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: defence 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 defence companies.
- Partial evidence
- Its own public description names part of defence companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name defence 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 120 defence companies based in the United Kingdom
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Defence companies based in the United Kingdom at a glance
As of Sep 19, 2026Companies by employee count
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 120 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 defence 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 “defence 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 defence 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 defence 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, 17,333 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.
Defence companies by metro
- Defence companies in London37
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 defence 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 defence companies are there based in the United Kingdom?
RevenueBase identified 120 defence 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?
BAE Systems, headquartered in London, tops this list with the largest team on record.
Which city has the most defence companies?
London leads with 37 headquartered companies, followed by Bristol (10) and Farnborough (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 17,333 verified decision-maker contacts tracked across these 120 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.
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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.