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Defence Companies in the UK: 1,000+ Active Firms (2026)
Defence companies in the UK design, manufacture and support security-critical equipment, systems and services for public-sector and allied customers.
Buying centres tend to sit with defence procurement teams, security agencies, prime-contractor supply chains and operational technology owners rather than general corporate IT. Demand clusters around platform subsystems, secure communications, sensors, cyber and intelligence support, specialist manufacturing, maintenance and testing, with services often bundled into long-cycle programmes. Buyers are mostly public-sector or allied institutional customers, but many suppliers also sell through larger integrators. Engagements tend to involve formal qualification, security clearance, export-control review and evidence of delivery resilience, so even smaller specialists often need procurement discipline more typical of mid-market industrial firms.
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The UK cohort is relatively compact: 1,007 defence companies are actively trading, with the population centred on firms whose defence activity is material rather than incidental. Reported employment across the cohort totals 5,920 people, pointing to a visible operating base but also to a sector where many suppliers remain specialist engineering, services or systems houses rather than very large employers. The count is therefore better read as a supply-chain map for defence-facing capability than as a broad tally of all firms with occasional public-sector contracts.
Procurement and assurance matter as much as product fit. Defence-facing suppliers usually work through formal tenders, framework routes or prime-contractor channels, with security vetting, controlled-information handling and audit trails built into delivery. Export-control compliance can narrow the buyer set where equipment, software or technical know-how may be transferred outside the UK, while classified work raises the cost of onboarding staff and subcontractors. Market structure is correspondingly gated: a supplier can have relevant technology but still face a slow route to contract award if accreditation, provenance and support arrangements are not already in place.
Procurement demand appears to favour suppliers that can evidence delivery history, security culture and integration capability, which tends to advantage established operators and subcontractors already embedded in programme chains. Earlier-stage specialists may still find openings where operational needs are tightly defined, but sales cycles remain long and certification burdens limit easy entry. Consolidation has been a plausible route for niche engineering and services providers, particularly where buyers prefer fewer hand-offs across secure delivery. The sector is therefore likely to keep a split shape: a small group of scaled contractors, surrounded by specialist firms that win work through certification, domain knowledge and trusted relationships.
1,007
Active firms
2026
170
Above £5M
Reported revenue
125
Newer firms
Incorporated since 2022
Key facts
About 16% of the trading cohort reports turnover above £5M (170 of 1,007 firms) — the rest sits below that revenue band.
12% of the cohort was incorporated since 2022 (125 firms), so a sizeable share is in its first few filing cycles.
Defence and national security suppliers typically sell into public-sector and allied-customer procurement processes rather than purely commercial buying cycles.
Activity spans equipment design, manufacturing, systems work and support services, so supplier comparisons usually need to separate product-led and service-led models.
Continuity of supply is a core screening issue because buyers are dealing with security-critical systems and services.
Top UK defence companies
EPA Manufacturing Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures small arms ammunition, explosive ordnance disposal equipment, and related defence products. Provides design, development and production of bespoke defence systems, along with ammunition…
Serves defence and security buyers including the UK MoD, CAST, armed forces, government departments, national security agencies and private defence companies.
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 2y
Location
MDH DEFENCE LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures CBRN filtration, fresh air filtration, and environmental control systems for military platforms, including vehicles, ships, and shelters, providing crew heating and cooling…
Serves defence ministries, armed forces and military platform manufacturers/integrators worldwide, especially teams responsible for vehicles, ships, rigid shelters and tented shelters.
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 2y
Location
RUK ADVANCED SYSTEMS LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops and markets military weapon systems and defence equipment, including urban combat missiles and “hard kill” torpedoes, operating as a subsidiary of a state‑owned arms manufacturer and…
Financial Health
StableStable · Hiring · 29% CAGR over 2y
Location
ZERO ALPHA SOLUTIONS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies expeditionary energy and information systems for defence and security operations, including hybrid power systems, battery management units, generators, lighting and communications equipment,…
Serves military forces and defence and security organisations in the UK and Europe, particularly commanders and units involved in early-entry operations in austere or zero-infrastructure environments.
Financial Health
HealthyHealthy · Hiring · 26% CAGR over 4y
Location
MERCURY COMPUTER SYSTEMS LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures electronics and computing systems for aerospace and defence applications, including RF and microwave components, embedded processing modules, data storage and management…
Serves aerospace and defence organisations, including defence primes, commercial aviation and space programme teams, and government mission buyers across land, sea, air, space and cyber domains.
Financial Health
HealthyHealthy · Hiring · 18% CAGR over 2y
Location
Precision Technic Defence Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsSupplies defence and security equipment and integrated systems for military and law enforcement users. Provides soldier systems, C4ISR technologies, platform and sensor systems, unmanned systems, as…
Serves national governments, armed forces, national security agencies and law enforcement organisations worldwide, targeting defence and public-sector buyers responsible for tactical capability and…
Financial Health
HealthyHealthy · Hiring · 22% CAGR over 2y
Location
Supacat Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns, develops, prototypes and manufactures high‑mobility military off‑road vehicles, tactical platforms and trailers. Provides engineering services including vehicle design, prototype build,…
Serves defence and government buyers, including ministries of defence, armed forces, special forces and military procurement teams, plus defence primes needing vehicle engineering support.
Financial Health
StrongStrong · Growing, Hiring · 22% CAGR over 2y
Location
Subsea Craft
Develops maritime technologies and specialised surface and submersible craft for defence and security applications, including platforms for maritime mobility, testing and deployment of military…
Serves defence and maritime security customers, particularly naval forces and UK military stakeholders involved in testing, procurement and deployment of maritime capabilities.
Financial Health
Insufficient historyInsufficient history
Location
Metis Aerospace Ltd
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsDesigns and manufactures RF-based drone detection systems, signals intelligence (SIGINT) technologies, and uncrewed aircraft systems. Provides research, development, integration and support of…
Serves public, private and military organisations, including airports, prisons, critical infrastructure operators, event security teams, marine operators, VIP protection clients and defence forces.
Financial Health
HealthyHealthy · 0% CAGR over 3y
Location
Roke Manor Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops defence and security technologies including AI analytics, cybersecurity tools, electromagnetic spectrum systems, autonomous and robotic platforms, and specialised sensors. Provides…
Serves defence, security and industrial B2B and public sector buyers, including MOD and other government agencies, military users, and organisations needing cyber, intelligence, AI, autonomy, sensors…
Financial Health
StableStable · 0% CAGR over 4y
Location
Exail Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops navigation, robotics and autonomous systems for defense, maritime and aerospace applications, including inertial navigation systems, mine countermeasure equipment, unmanned surface and…
Serves public-sector defence organisations, including navies and armies, plus maritime, offshore energy, oil and gas, construction, seabed survey, ocean science and aerospace manufacturers and…
Financial Health
StrongStrong · Growing, Hiring · 13% CAGR over 2y
Location
NOVA INTEGRATED SYSTEMS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, develops, manufactures and integrates defence systems including command post combat management systems, SATCOM communication systems, UAV ground control stations, radar systems, debriefing…
Sells to defence and aerospace customers, including armed forces, defence ministries, and prime contractors needing combat management, communications, radar, UAV ground control, and other military…
Financial Health
WeakWeak · -3% CAGR over 4y
Location
Millstream Penthouse Systems Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures specialist military materials and equipment, including chemical agent resistant fabrics (CARM), NBC and non‑NBC collective protection systems, tents and penthouse structures,…
Sells primarily to defence and public-sector buyers, including the UK MoD, overseas military organisations and civil defence bodies needing NBC/non-NBC protective systems, tentage and specialist…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
ISTEC SERVICES LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns, manufactures and supplies weapon mounting systems and ancillaries for small‑arm and medium‑calibre weapons. Provides integration and support services for mounts used on land vehicles, naval…
Serves defence and military customers, including the UK MoD and US DoD, plus land, sea and air platform operators or integrators requiring small-arm and medium-calibre weapon mounting systems.
Financial Health
WeakWeak · -2% CAGR over 2y
Location
TRIMAX TECHNOLOGIES LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and supplies specialised equipment, including explosive ordnance disposal (EOD) tools, for defence, law enforcement and security organisations. Provides technical consultancy, training…
Serves defence, law enforcement and security organisations, including EOD teams, elite operational end users, integrated project teams and technical stakeholders in domestic and international markets.
Financial Health
StrongStrong · Growing, Hiring · 26% CAGR over 2y
Location
LIVELINK AEROSPACE LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops air surveillance and counter‑drone systems using passive radio‑frequency detection sensors and integrated command‑and‑control software. Technology detects, identifies and tracks UAV signals…
Serves defence and security organisations, including military, aviation, prisons, critical national infrastructure, public safety agencies, VIP protection teams and renewable energy operators.
Financial Health
StrongStrong
Location
Radnor Range Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides independent testing and evaluation of weapons, ordnance, munitions and explosives, including ballistic and blast trials, armoured vehicle and material testing, UN series and insensitive…
Serves defence and security organisations, including public-sector military customers, armoured vehicle and materials manufacturers, weapons and munitions developers, drone/counter-drone teams, and…
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 2y
Location
Delkia Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides systems integration and engineering services for nuclear and defence sectors, including process control and containment systems, nuclear digital technologies, mission systems, defence…
Serves organisations in the nuclear and defence sectors, including buyers responsible for safety-related and mission-critical systems, operational readiness, security, process control and containment.
Financial Health
StrongStrong · Growing, Hiring · 95% CAGR over 4y
Location
ARTECS INTERNATIONAL LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, manufactures and integrates turnkey equipment and systems for defence and security organisations, including mobile camps, petroleum logistics infrastructure, soldier support equipment,…
Serves B2B and public-sector defence and security organizations, including military, government and institutional buyers worldwide.
Financial Health
StableStable
Location
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDevelops software for defence and security networks that enables digital interoperability between devices, platforms and systems in the battlespace. Provides products for data exchange, system…
Serves defence and security organisations, military operators, government agencies, and defence technology partners needing interoperability across battlespace systems, platforms and devices.
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
Location
KOMCEPT SOLUTIONS LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops and supplies security and intelligence technologies for government and law enforcement, including technical surveillance counter‑measure (TSCM) equipment, lawful interception systems, border…
Serves law enforcement, government agencies, border security authorities, critical infrastructure security teams and TSCM/security professionals needing specialist security and intelligence…
Financial Health
StrongStrong · Growing, Hiring · 22% CAGR over 4y
Location
Acubed IT Solutions Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops secure cross-domain software systems enabling information sharing across air‑gapped and classified networks for government, defence, and critical infrastructure. Builds applications using a…
Serves government, defence and critical national infrastructure organisations, including UK public sector security teams, defence primes and classified-environment programme teams needing…
Financial Health
WeakWeak · Hiring · 22% CAGR over 2y
Location
Repaircraft PLC
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsDesigns, manufactures and supports defence and aerospace equipment. Supplies and manages spare parts for military systems including armoured fighting vehicles, aircraft and naval equipment, and…
Sells to defence and aerospace organisations, primarily B2B and government/public-sector buyers needing equipment, spare parts and upgrades for land, sea and air platforms, including armoured…
Financial Health
StrongStrong · Profitable, Growing, Hiring · 21% CAGR over 1y
Location
INSTRO PRECISION LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures support equipment and integrated systems for military and commercial electro‑optical sensors, including surveillance systems, night‑vision devices, targeting equipment,…
Sells to defence and security organisations, military equipment programmes, special forces users, and commercial electro-optic OEMs operating in target acquisition, joint fires and surveillance…
Financial Health
StableStable · -67% CAGR over 4y
Location
VAN KAPPEL LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides engineering, maintenance, repair and remanufacturing services for military vehicles and equipment. Supports defence forces with fleet capability management, direct repair services, equipment…
Serves defence and public-sector military customers, primarily the UK Ministry of Defence, British Army units overseas, and Dutch forces with military vehicle fleets and equipment.
Financial Health
StrongStrong · Growing, Hiring · 5% CAGR over 2y
Location
TLMNEXUS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides software development, digital lifecycle management tools, and engineering consultancy for defence and aerospace equipment. Designs applications and data‑driven systems that support…
Serves defence and security organisations, including UK MOD teams, front-line commands and aerospace/defence industry partners responsible for high-value military equipment safety, maintenance and…
Financial Health
HealthyHealthy · -68% CAGR over 4y
Location
Repaircraft (UK) Limited
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsDesigns, manufactures and supplies spare parts and components for defence equipment, including armoured fighting vehicles, aircraft and naval systems, and provides engineering and technical support…
Serves defence and aerospace organisations, including armed forces, defence ministries and contractors responsible for land, sea and air military platforms such as armoured vehicles, aircraft and…
Financial Health
StrongStrong · Profitable, Growing, Hiring · 21% CAGR over 1y
Location
SC Group-Global Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsOperates as a holding company for engineering subsidiaries that research, design, prototype, manufacture and supply high‑mobility vehicles, trailers, marine engines and engineered equipment, and…
Serves defence organisations and special forces, maritime operators, and civil-sector businesses needing engineered systems for harsh environments, across international markets.
Financial Health
StrongStrong · Growing · 0% CAGR over 2y
Location
Allen Integrated Solutions Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides engineering design, consultancy and commissioning services, along with technical and management support for government and defence programmes. Delivers systems lifecycle guidance, analytics,…
Serves government customers, especially federal, national security, defence and homeland security agencies, using prime and subcontract contract vehicles for mission-focused programmes.
Financial Health
DistressedDistressed · -41% CAGR over 4y
Location
STRATEGIC SHIELD GLOBAL LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides defence and security consultancy and project delivery services. Activities include defence strategy advice, equipment testing and inspections, procurement and supply of weapons and…
Serves governments, defence ministries, security agencies and commercial defence-sector organisations in the UK and internationally, especially buyers involved in defence capability, equipment…
Financial Health
WeakWeak · -65% CAGR over 4y
Location
AISH TECHNOLOGIES LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures systems that protect electronic equipment in harsh environments, including rugged display systems, electronic cabinets, cathodic protection and degaussing systems, and…
Serves defence, marine and commercial organisations, including procurement teams for naval submarine and surface ship programmes, land-based military platforms, and buyers operating equipment in…
Financial Health
StableStable · -86% CAGR over 2y
Location
Eskan Electronics Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures covert surveillance devices, technical surveillance counter‑measure systems, and RF jamming equipment. Products are used by law enforcement, intelligence services, and…
Sells to law enforcement agencies, intelligence services and military organisations worldwide, including public-sector and defence procurement teams with specialist security and operational risk…
Financial Health
StrongStrong · Growing, Hiring · 36% CAGR over 2y
Location
Primary Network Products (UK) Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures custom-built computers and IT hardware for defence and maritime applications, including naval PCs, shock‑tested server racks, power filters and secure KVM systems, with…
Serves defence and maritime organisations, including the UK MOD, Royal Navy, allied navies and MOD project partners needing certified naval IT systems for shipboard applications.
Financial Health
StableStable · 0% CAGR over 2y
Location
FORCE DEVELOPMENT SERVICES LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures mission‑critical equipment and engineering solutions for defence, police and security sectors, including ballistic protection, tactical ladders, vehicle-borne intervention…
Serves government defence agencies, police and law enforcement bodies, armed forces, security organisations, humanitarian organisations, and strategic partners globally.
Financial Health
HealthyHealthy · -63% CAGR over 4y
Location
Banair (Holdings) Ltd
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns, manufactures and installs engineered equipment and infrastructure for military and government use, including modular storage systems, deployable shelters, heavy‑duty ramps, access bridges,…
Serves B2B and public-sector defence markets worldwide: armed forces, government agencies, tactical units, disaster-response teams and MRO operators with deployed or remote-environment requirements.
Financial Health
StrongStrong
Location
ROBAND ELECTRONICS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures electronic power supplies for aerospace and defence applications, including avionics, missiles, torpedoes, naval vessels, and fixed or mobile land systems, supplying power…
Sells to B2B and defence-sector customers needing power supplies for avionic, fixed-wing and rotorcraft systems, missiles and torpedoes, surface and underwater vessels, and fixed or mobile land…
Financial Health
StableStable · -67% CAGR over 4y
Location
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsDesigns and integrates modular electronic and information systems for intelligence and defence applications across naval, land, air and space platforms, including SIGINT, COMINT and ELINT systems for…
Serves defence and aerospace customers, including armed forces, naval, air and land platform operators, intelligence agencies, systems integrators and strategic industry partners.
Financial Health
StrongStrong
Location
Cornet Switching Systems Limited
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsSupplies defence data communications equipment including matrix switching systems, digital cross‑connects, IP gateways, optical switches and video transmission devices. Provides design, installation…
Serves defence sector buyers in the UK and Ireland, including UK MoD and NATO programmes, prime contractors, and organisations running major defence communications centres.
Financial Health
StableStable
Location
Tods Defence Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, tests and manufactures advanced composite structures, sonar domes and acoustic stealth materials for naval ships and submarines. Provides engineering design, development testing,…
Serves defence primes, naval shipbuilders and public-sector marine defence organisations involved in ship and submarine programmes.
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
Cambridge Pixel Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops radar signal processing software, tracking and display applications, and radar interface hardware. Provides SDKs, simulation tools and data distribution systems that integrate radar, camera…
Sells to B2B and defence/public-sector buyers building radar and sensor systems, including developers, system integrators and operators in air defence, ATC, border security, maritime, naval and…
Financial Health
HealthyHealthy · Hiring · 11% CAGR over 2y
Location
T.E.K. MILITARY SEATING LIMITED
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsDesigns and manufactures seating systems for military vehicles, including driver, commander and crew seats, as well as specialist seating. Also develops protective matting and related equipment, with…
Serves B2B defence-sector customers, including military vehicle OEMs, systems integrators and procurement teams involved in armoured or specialist vehicle programmes.
Financial Health
HealthyHealthy · -26% CAGR over 3y
Location
Apec Systems Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns, builds and supplies bespoke surveillance technology and equipment. Develops covert surveillance solutions intended for law enforcement and policing operations, supporting monitoring,…
Serves law enforcement bodies and public-sector policing and surveillance units worldwide, particularly frontline teams requiring operational surveillance capabilities.
Financial Health
WeakWeak · 2% CAGR over 2y
Location
Asl Grp Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsManufactures lightweight composite armour systems providing ballistic, blast and anti-cut protection for vehicles, marine vessels, buildings and infrastructure. Produces moulded armour, spall liners…
Serves defence and security organisations, public-sector and private vessel operators, naval and patrol boat teams, vehicle security fleets, cash-in-transit operators, superyacht owners and high-risk…
Financial Health
DistressedDistressed · -6% CAGR over 5y
Location
DYNASYSTEMS UK LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures blast and ballistic resistant buildings, protective walling, windows, watchtowers and entry control systems. Supplies security and force‑protection products, including…
Serves defence and government agencies, NGOs and commercial organisations, including embassies, airports, critical infrastructure, construction/manufacturing, energy, transport, hospitality and…
Financial Health
StrongStrong
Location
Rinicom Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and supplies secure wireless communication and detection systems. Designs bespoke telecommunications products including mesh SDR radios, aerial communication networks, video analytics and…
Serves law enforcement agencies, first responders, defence and security organisations, maritime operators, and critical civilian infrastructure owners.
Financial Health
StableStable · Hiring · 3% CAGR over 4y
Location
EXSEL ELECTRONICS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and integrates information and cyber security systems, including data‑centric security software for protecting sensitive documents and information. Provides multi‑domain communications and…
Serves government bodies, defence organisations and other enterprises handling secret, sensitive or personal information across multi-domain communications and regulated data environments.
Financial Health
HealthyHealthy · -5% CAGR over 4y
Location
Explora Security Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides security engineering and consultancy focused on force protection for critical infrastructure and strategic sites, including blast and ballistic mitigation design, hostile vehicle protection,…
Serves public-sector and institutional buyers, including defence agencies, diplomatic missions, NGOs and critical infrastructure operators responsible for strategic, high-risk sites worldwide.
Financial Health
StrongStrong · Hiring · 14% CAGR over 4y
Location
Mabway Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides military training support including live simulation and special effects for exercises, along with manpower provision, logistics support, communications services, and systems engineering for…
Sells primarily to defence and military organisations, government and public sector bodies, and also serves health, nuclear, energy, space, public safety, manufacturing, agriculture and transport…
Financial Health
HealthyHealthy · Profitable · 0% CAGR over 4y
Location
SQEP LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides specialist consultants and technical support to defence, aerospace and critical infrastructure programmes, including airworthiness and certification, cyber and information assurance,…
Serves the UK MOD, NATO and industry organisations in defence, aerospace and critical infrastructure, including safety-critical sectors across air, land, sea, nuclear and autonomous platforms.
Financial Health
StrongStrong · Growing, Hiring · 58% CAGR over 4y
Location
RED Scientific Reply Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides technical consultancy in operational analysis, data science, mathematical modelling and digital engineering. Develops software, systems engineering, supportability and safety services, and…
Serves UK defence and central government organisations, including MoD bodies, other government departments and agencies, plus defence primes, UK industry, aviation and defence organisations, European…
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 3y
Location
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How UK defence companies work and how to sell to them
What they do
Defence companies usually earn through programme contracts, subcontracted work packages, support agreements and specialist services rather than high-volume self-serve sales. Revenue can be tied to fixed-price delivery, milestone payments, time-and-materials work, costed engineering change requests, testing, through-life maintenance or licence fees for secure software and technical intellectual property. Hardware-led firms may bundle design, manufacture, integration and spares, while services firms sell cleared personnel, assurance, simulation, analysis or managed operational support. Gross margin depends heavily on whether the firm owns reusable technology or supplies labour and production capacity into a larger programme chain.
Who they sell to
Most defence suppliers sell to public-sector defence and security buyers, allied institutional customers, prime-contractor procurement teams and operational units with defined mission requirements. The buying group typically includes commercial officers, programme directors, engineering leads, security accreditors, finance teams and end users with operational authority. Direct awards are uncommon for new suppliers; formal tenders, framework places, partner-led routes and prime-contractor qualification tend to dominate. Sales cycles are often long because technical fit, provenance, clearance, export-control position, delivery history and support continuity all have to be accepted before price becomes the only question.
What they buy
Most defence firms tend to spend on systems that help them bid, deliver and evidence controlled work. Relevant categories include CRM for complex account mapping, bid and proposal tools, contract management, finance and project accounting, supply-chain risk management, quality management, export-control workflow, secure document handling, identity and access management, cyber monitoring, endpoint security and audit logging. Engineering and manufacturing suppliers may also buy product lifecycle management, test management, inventory control, specialist recruitment, certification support and outsourced IT operations. Services-led firms are more likely to need workforce planning, vetting administration, training, legal advice and margin reporting by work package.
Why and how to sell to them
Defence buyers tend to evaluate vendors when a framework win, new subcontract, accreditation push or headcount build exposes gaps in delivery control. Common pressures include bid costs, slow onboarding of cleared staff, inconsistent audit trails, supplier assurance, cyber requirements and the need to prove continuity for long-duration support obligations. Outbound messages usually work better when they reference procurement discipline, controlled information, programme risk and evidence packs rather than generic productivity. Credibility matters: case-study shapes, security posture, UK delivery capability and an ability to work around gated procurement processes are often more persuasive than claims about speed or novelty.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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