Electronics Companies in the UK: 2,476 Active Firms (2026)
Electronics manufacturers design and assemble electronic equipment and components for specialised, regulated UK supply chains.
Buying centres tend to sit with engineering, operations and supply-chain teams, with procurement and quality functions involved once products move from prototype into repeat production. Customers are usually business, industrial or regulated-market buyers rather than consumers: equipment makers, infrastructure suppliers and specialist distributors needing embedded hardware, assemblies or components that can pass conformity checks. Engagements are often qualified-supplier relationships, with documentation, labelling, traceability and technical support built into the sale. That makes the category closer to engineered production than commodity resale, even where volumes are modest.
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Around 2,476 electronics manufacturers are actively trading in the UK, giving the page a sizeable but fairly specialised cohort rather than a mass manufacturing universe. Within that group, 389 companies report turnover above £5M, while 209 were incorporated since 2022, pointing to a base that is more weighted toward established operators than new incorporations. Employment reporting covers 123 firms, and those firms together account for 6,313 reported employees. The footprint therefore includes a visible engineering and production workforce, although many businesses remain below the scale normally associated with large plant networks.
Product access is shaped by rulebooks rather than by a sector-wide licence. In-scope electrical and electronic equipment needs technical documentation, a Declaration of Conformity, required labelling and the relevant conformity marking, with OPSS enforcing hazardous-substance restrictions. Wider regimes can also apply where equipment raises electrical safety, electromagnetic compatibility or radio equipment issues. Waste obligations add another layer: organisations placing electrical and electronic equipment on the UK market must register as producers, with smaller producers registering directly and higher-volume producers joining a compliance scheme.
Commercial development appears to depend less on consumer electronics cycles and more on the depth of industrial qualification, design-in relationships and regulatory upkeep. The cohort tends to reward firms that can combine engineering support with repeatable assembly, because customers in regulated supply chains are slow to switch once a component or sub-assembly is approved. New entrants may still find openings around embedded hardware and specialist equipment, but scale-up paths look comparatively patient. Consolidation is likely to be buyer-led where larger manufacturers want certified capacity, traceable suppliers or adjacent technical capabilities.
What’s in the file
One row per company, 50+ columns — everything below plus each company’s verified directors, from Companies House filings.
Company data
Verified directors — included
2,476
Active firms
2026
389
Above £5M
Turnover band
209
Since 2022
New incorporations
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Key facts
About 15% of the trading cohort reports turnover above £5M (389 of 2,476 firms) — the rest sits below that revenue band.
8% of the cohort was incorporated since 2022 (209 firms), so a sizeable share is in its first few filing cycles.
UK electronics manufacturers face product-safety, environmental and market-access rules rather than a single sector licence.
In-scope electrical and electronic equipment needs technical documentation, a Declaration of Conformity, required labelling and the relevant conformity marking under the 2012 hazardous-substances rules enforced by OPSS.
UK electronics value added rose from £4.1 billion in 2000 to £16.1 billion in 2024, a 5.8% CAGR compared with 1.6% for UK manufacturing overall.
Electronics and electrical equipment together represent 10% of UK manufacturing value added and 13% of UK manufacturing exports, alongside trade deficits of £29 billion for electronics and £16 billion for electrical equipment.
The UK ranked fifth among the G7 plus China by 2022 electronics value added, at US$18 billion, behind China, the USA, Japan and Germany.
Top UK Electronics companies
Financial 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
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Computed from 4 filingsManufactures electronic products and assemblies, including PCB assemblies, full device builds, cable assemblies and wiring harnesses. Provides clean‑room assembly, testing, repair, and production…
Serves B2B OEMs and product companies in MedTech, GreenTech, aerospace, marine, industrial controls, scientific research and defence, including global firms requiring UK-based electronics…
Financial Health
WeakWeak · Hiring · 3% CAGR over 3y
Location
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Computed from 2 filingsProvides contract electronics manufacturing services including PCB assembly, SMT and conventional population, prototype builds, box build assembly, wiring looms and harnesses, PCB design and layout,…
Serves B2B OEMs and engineering companies in automation, automotive, industrial instrumentation, medical, laboratory, aerospace, defence, communications, renewable energy, power correction and…
Financial Health
StableStable · -8% CAGR over 1y
Location
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Computed from 5 filingsProvides contract electronics manufacturing services including printed circuit board (PCB) assembly, surface‑mount and selective soldering, testing and full box build. Supports design for…
Serves B2B electronic equipment manufacturers and engineering teams in high-integrity sectors, including aerospace, defence, medical, automotive and energy, seeking compliant UK contract…
Financial Health
StrongStrong · Growing, Hiring · 10% CAGR over 4y
Location
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Computed from 3 filingsProvides contract electronics design and manufacturing services, including product development, prototyping, PCB surface‑mount assembly, cable assembly, testing and turnkey production, supporting…
Serves B2B electronics customers, including established brands and start-ups in medical and life sciences, aerospace and defence, oil and gas, scientific instrumentation, industrial controls,…
Financial Health
StableStable · -1% CAGR over 2y
Location
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Computed from 3 filingsProvides contract electronics manufacturing services including PCB assembly, surface‑mount and through‑hole assembly, component procurement, box build and wiring, and final product testing, alongside…
Serves UK businesses, product developers and individuals needing outsourced electronics production, from large multinationals to small entrepreneurial organisations, across aerospace, automotive,…
Financial Health
WeakWeak · -4% CAGR over 2y
Location
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Computed from 5 filingsDesigns and manufactures customer‑specified electromechanical and electronic equipment for the rail industry, including vigilance systems, control electronics, interface units and lighting. Provides…
Serves B2B rail industry customers, including train operators, rolling stock engineers, tram operators, OEMs and maintenance teams involved in new build, overhaul and traction-related programmes.
Financial Health
DistressedDistressed · -5% CAGR over 4y
Location
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Computed from 5 filingsProvides contract electronics manufacturing services including PCB assembly, electromechanical assembly, prototyping, testing and full turnkey production. Serves sectors such as medical,…
Serves B2B electronics OEMs and product companies in sectors including medical, security, marine, transport, telecoms, aerospace and defence, industrial controls, LED lighting, audio/video, telemetry…
Financial Health
HealthyHealthy · Hiring · 9% CAGR over 4y
Location
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Computed from 5 filingsProvides electronic product design and manufacturing services, including schematic and PCB design, embedded firmware development, prototyping, PCB assembly, and box-build production. Also offers…
Serves B2B product companies and OEMs in agriculture, automotive, medical and consumer markets, primarily in the UK with customers also across Europe, Asia and the USA.
Financial Health
StrongStrong · Hiring · 37% CAGR over 4y
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Computed from 5 filingsDesigns and manufactures electronic security systems for professional installers, including alarm control panels, keypads, motion detectors, wireless devices, sounders and communication modules, with…
Serves B2B professional security installers, alarm installation businesses and trade distributors, including UK installers and international distributors in the security systems market.
Financial Health
HealthyHealthy · -62% CAGR over 4y
Location
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Computed from 5 filingsManufactures electronic test, measurement and fault‑diagnosis equipment used in R&D, repair, production and education. Also provides contract electronics manufacturing services including materials…
Serves engineering, maintenance and electronics repair teams in aerospace, defence, rail, transit, manufacturing and education, plus OEMs and product businesses needing contract electronics…
Financial Health
StrongStrong · Growing · 2% CAGR over 4y
Location
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Computed from 5 filingsProvides electronics manufacturing services including PCB assembly using surface‑mount and through‑hole technologies, prototyping, box build and system integration, cable assemblies, conformal…
Serves B2B electronics buyers in high-reliability sectors, including defence manufacturers, medical and healthcare device companies, engineering and manufacturing firms, energy/oil and gas operators,…
Financial Health
StableStable · -69% CAGR over 4y
Location
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Computed from 3 filingsProvides electronic contract manufacturing services including PCB assembly, cable and sub-assemblies, box build integration, testing, and shipping fulfilment. Also offers supply chain management and…
Serves B2B electronics OEMs and product companies, especially in regulated sectors such as medical and laboratory, military and defence, marine, automotive, oil and gas, lighting, audio, aviation,…
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 2y
Location
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Computed from 4 filingsProvides electronic manufacturing services including product design and development, prototype and new product introduction, end‑to‑end manufacturing, testing and inspection, supply chain management,…
Serves B2B OEMs and product companies in aerospace, defense, healthcare, life sciences, industrial, data communications, energy, transportation and semiconductor capital equipment, especially complex…
Financial Health
WeakWeak · Hiring · 4% CAGR over 3y
Location
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Computed from 5 filingsManufactures printed circuit boards and provides electronic manufacturing services, including PCB assembly (surface mount and through‑hole), PCB design and layout, prototype and batch production, box…
Serves B2B electronics customers needing PCB manufacturing, assembly and design, including organisations in industrial control, rail, green technology, research, oil and gas, marine, defence,…
Financial Health
HealthyHealthy · Growing · 1% CAGR over 4y
Location
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Computed from 5 filingsProvides electronic manufacturing services for OEMs, including PCB assembly, complete product assembly and testing. Supports product development, supply chain management, and distribution of…
Serves OEMs and technology companies, from multinationals to niche specialists, in aviation, communications and computing, energy, industrial instrumentation, healthcare and life sciences, and safety…
Financial Health
StableStable · -68% CAGR over 4y
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Computed from 5 filingsProvides electronic manufacturing services including PCB assembly, prototype and small-batch builds, and volume production. Supports product development through new product introduction processes,…
Serves B2B customers and OEMs in aviation, automotive, health and safety, security, and medical markets, particularly organisations needing prototype, small-batch, or volume electronic product builds.
Financial Health
StrongStrong · Growing, Hiring · 4% CAGR over 4y
Location
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Computed from 3 filingsProvides electronics manufacturing services for OEMs, including design for manufacturing, rapid prototyping, and full production of electronic assemblies. Also offers supply chain management, product…
Serves OEMs and product companies in industrial, medical and security markets, including engineering, operations and supply chain teams managing new electronics products or product continuity.
Financial Health
WeakWeak · -4% CAGR over 2y
Location
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Computed from 4 filingsDesigns and manufactures electromechanical and electronic components, including cable harnesses, cryogenic cables, EMC filters, electronic enclosures, audio connectors, and box or panel assemblies,…
Serves B2B OEMs, engineering teams and systems integrators in space, aerospace, defence, medical, automotive, industrial and broadcast sectors, especially organisations with mission-critical…
Financial Health
WeakWeak · -24% CAGR over 3y
Location
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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
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Computed from 5 filingsProvides electronics manufacturing services including printed circuit board assembly (SMT and through‑hole), PCB prototyping, cable assembly and box build. Offers inspection, testing, engineering…
Serves B2B electronics customers across industrial sectors, including renewable technology firms, from product developers needing prototypes to OEMs requiring volume production and turnkey…
Financial Health
HealthyHealthy · -14% CAGR over 4y
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Computed from 5 filingsDesigns, develops and manufactures bespoke electronic systems and embedded software. Provides prototyping, testing and product consultancy, producing components and equipment such as subsea…
Serves B2B organisations in defence and security, medical, industrial, aerospace, marine and transport sectors, including major defence contractors and teams working on mission-critical or…
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
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Computed from 5 filingsProvides contract electronics manufacturing services including PCB prototyping, surface‑mount and through‑hole PCB assembly, and full product box build. Also offers supply chain management, testing,…
Sells to businesses outsourcing electronics manufacturing, prototyping and box build, particularly OEMs and product companies in aerospace, marine and leisure, medical, military and defence,…
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 4y
Location
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Computed from 5 filingsProvides contract electronic manufacturing services, including PCB assembly, sub‑assembly and full product assembly, wiring and cable assembly, testing, programming, rework, and component…
Serves B2B electronics product companies and OEMs in medical, military/aerospace, industrial, oil & gas, science, broadcast, commercial and automotive sectors needing UK-based manufacturing support.
Financial Health
WeakWeak · -66% CAGR over 4y
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Computed from 3 filingsManufactures specialised CCTV and public address and general alarm (PAGA) systems for industrial and hazardous environments. Designs, builds, and installs communication and security equipment…
Serves B2B customers in oil and gas, renewable energy, marine, defence and nuclear markets, mainly through large telecoms systems integrators and security systems integrators working on heavy…
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StrongStrong · Growing, Hiring · 31% CAGR over 2y
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Computed from 5 filingsProvides electronic design and contract manufacturing services, including technology research, product engineering, PCB layout, FPGA/ASIC and embedded software development. Produces prototype and…
Serves B2B customers from small technology companies to global blue-chip operations needing outsourced electronic design, product engineering, prototyping and contract electronics manufacturing for…
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HealthyHealthy · -68% CAGR over 4y
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Computed from 4 filingsDesigns and manufactures custom switch‑mode power supplies and battery chargers, including AC‑DC, DC‑DC and power factor corrected units. Produces bespoke power systems in low to high volumes for…
Serves OEMs and manufacturers needing custom power supplies and battery chargers, particularly in medical, military, industrial machinery, robotic automation and fire detection sectors, from…
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HealthyHealthy · -3% CAGR over 3y
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Computed from 3 filingsDevelops and manufactures components and subsystems for medical and industrial equipment, including machine vision cameras, laser sources and beam delivery systems, precision motion motors and…
Serves B2B OEMs and system builders in medical, life sciences, surgery, robotics, automation and advanced manufacturing markets worldwide, especially teams building mission-critical industrial and…
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HealthyHealthy · Profitable, Hiring · 51% CAGR over 2y
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Computed from 3 filingsProvides contract electronic manufacturing services, including PCB design and surface-mount assembly, box build assembly, wiring loom and coil winding, product testing and inspection, repairs and…
Serves B2B customers needing outsourced electronics manufacturing, including product innovators, R&D-led businesses and companies in the global semiconductor and wafer fabrication sector, with…
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HealthyHealthy · Profitable, Growing · 0% CAGR over 2y
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Computed from 3 filingsProvides contract electronics manufacturing services including printed circuit board (PCB) assembly, surface‑mount and through‑hole assembly, rapid prototyping, materials procurement, testing,…
Serves B2B customers in medical, automotive, aerospace, engineering, electronics, electrical, MOD, leisure, construction and OEM markets, from product development teams needing prototypes to…
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StableStable · 4% CAGR over 2y
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Computed from 5 filingsDesigns and manufactures aerospace test equipment and search and rescue electronics, including emergency locator transmitters, distress beacons, direction‑finding systems and aviation antennas for…
Sells to B2B and government customers in aerospace, particularly civil and military aviation organisations and search-and-rescue operators needing airborne antennas, emergency locator beacons and…
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StableStable · 1% CAGR over 4y
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Computed from 3 filingsDesigns and manufactures fire alarm control panels, detectors and notification devices, as well as nurse call and emergency call systems, disabled refuge communication systems, accessible toilet…
Sells B2B to fire and electrical contractors, building services specifiers, facilities managers, housing providers, care homes and operators of public or commercial buildings.
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HealthyHealthy · Profitable · -4% CAGR over 2y
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Computed from 5 filingsDesigns and manufactures electrical enclosures, connection accessories and LED lighting products for hazardous and heavy industrial environments. Products include LV, MV and HV enclosures,…
Serves B2B customers in heavy industrial and hazardous-area sectors, including engineering and construction companies, oil and gas, nuclear, renewable energy, rail, marine, fire-rated and beverage…
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HealthyHealthy · -60% CAGR over 5y
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Computed from 3 filingsDesigns and manufactures electronic and electrical control systems, including hardware and software, and provides electronic assembly and product development services. Produces custom units and…
Serves small and large B2B customers in the UK and internationally, including automotive, oil and gas, timber, aerospace, power, pump, pharmaceutical, warehouse and distribution sectors.
Financial Health
HealthyHealthy · -3% CAGR over 2y
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Computed from 3 filingsProvides contract electronics manufacturing services including printed circuit board fabrication, sheet metal fabrication and PCB assembly. Produces multi‑layer and flex PCBs, precision metal…
Serves B2B electronics manufacturers, OEMs and product developers needing support from prototype to production, including buyers of PCB, sheet metal, PCBA and box-build manufacturing across the UK.
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StableStable · Profitable · -1% CAGR over 2y
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Computed from 5 filingsManufactures inductive, resistive and electronic components including transformers, chokes, filters, power controllers and resistors. Develops customised electrical and power electronics solutions,…
Serves B2B engineering and industrial customers in drive technology, railway, e-mobility, power electronics, medical testing, marine and offshore, defence, and vibratory conveyor applications.
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StableStable · 0% CAGR over 4y
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Computed from 4 filingsManufactures electrical instrumentation and control products including current transformers, digital and analogue panel meters, power meters, transducers and protection relays. Also designs and…
Serves B2B customers in electrical engineering, power distribution and industrial control markets, including project buyers needing electrical measurement and control components worldwide.
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StableStable · -78% CAGR over 3y
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Computed from 3 filingsManufactures wireless radio fire alarm systems and detection equipment, including battery-powered detectors and control units used in buildings where wired installation is impractical, such as…
Serves UK businesses and organisations needing fire detection for historic buildings, occupied premises where cabling is disruptive, temporary sites, and projects requiring rapid installation.
Financial Health
WeakWeak · -98% CAGR over 2y
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Computed from 3 filingsProvides contract electronics manufacturing services including printed circuit board (PCB) assembly, surface‑mount and through‑hole assembly, prototyping, testing, inspection, and finished product…
Serves UK and Ireland businesses developing electronic products, including OEMs, electronics designers and manufacturers needing PCB prototypes, assemblies and turnkey production support.
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StableStable · -6% CAGR over 2y
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Computed from 3 filingsDesigns and manufactures inductive position sensors and encoders for motion control systems. Products include rotary and linear position sensors used in robotics, aerospace, medical devices,…
Sells B2B to OEMs and engineering teams in medical devices, aerospace, industrial automation, robotics, marine, oil and gas, satcom, automotive and specialist vehicles that need position sensing for…
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StrongStrong · Profitable, Growing · 4% CAGR over 2y
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Computed from 3 filingsDesigns and manufactures energy‑saving lighting and HVAC control devices, including PIR occupancy sensors, microwave presence detectors, dimmer switches, photocell switches and time‑lag controls used…
Serves B2B buyers in building services and electrical supply, including electrical contractors, specifiers, OEMs and facilities teams for commercial, industrial and public buildings in the UK and…
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StableStable · -3% CAGR over 2y
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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…
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StableStable · -86% CAGR over 2y
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Computed from 3 filingsProvides subcontract electronics manufacturing services including surface‑mount and through‑hole PCB assembly, prototyping, box build assembly, device programming, conformal coating, wave soldering,…
Serves B2B electronics OEMs and product developers, from prototyping teams to low- and high-volume production buyers, across sectors including environmental monitoring, wearable technology,…
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HealthyHealthy · Hiring · 20% CAGR over 2y
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Computed from 5 filingsActs as a holding company for a group that provides contract electronics manufacturing services, including design for manufacture, rapid prototyping, printed circuit board assembly, testing and…
Serves B2B electronics product companies and OEMs in aerospace and defence, communications, motorsport, industrial controls, LED lighting, and oil and gas, from prototype buyers to production and…
Financial Health
DistressedDistressed · -68% CAGR over 4y
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Computed from 5 filingsProvides subcontract electronic manufacturing services, including cable assemblies and wire harnesses, PCB assembly, box and cabinet builds, and PLC control panel wiring. Also offers 3D CAD design…
Serves B2B clients, including blue-chip companies, building complex high-tech products in healthcare, power, military, scientific, rail, semiconductor, industrial and sound stage sectors.
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HealthyHealthy · Hiring · 7% CAGR over 4y
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Computed from 5 filingsDesigns and manufactures KVM (keyboard, video, mouse) switches, IP‑based KVM systems, extenders and remote access devices that enable users to control and manage multiple local or remote computers…
Sells to organisations managing critical IT systems, including control rooms, media and entertainment, healthcare, industrial manufacturing, energy and utilities, transport, air traffic control,…
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StableStable · -67% CAGR over 4y
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Computed from 4 filingsProvides electronics manufacturing services including design and production of printed circuit boards such as flexible, plated through‑hole and surface‑mount PCBs, as well as cable assemblies and…
Serves B2B engineering and procurement teams in aerospace, automotive, telecommunications, military and defence, maritime, security and data centre sectors.
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HealthyHealthy · Growing · 0% CAGR over 3y
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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…
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StrongStrong · Growing, Hiring · 36% CAGR over 2y
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Computed from 4 filingsDesigns and manufactures dataloggers, sensors, and data acquisition systems for environmental, infrastructure, and industrial monitoring. Supplies measurement and control instrumentation used in…
Serves research institutions, industrial operators, utilities and public-sector agencies in weather, water, energy, infrastructure, geotechnical, automotive and soil monitoring markets.
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HealthyHealthy · Hiring · 11% CAGR over 3y
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Computed from 4 filingsProvides electronics engineering services including electronic product design, PCB design and prototyping, microcontroller and FPGA development, RF and test equipment design, embedded and application…
Serves businesses developing electronics products, including engineering and product teams needing outsourced support for hardware, embedded software, prototypes, PCB assembly and box-build projects.
Financial Health
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How UK Electronics companies work and how to sell to them
What they do
Electronics manufacturers usually earn revenue through a blend of design engineering, prototyping, assembly and repeat production. Early work is often charged as non-recurring engineering, test development or tooling, with later revenue coming from unit pricing, batch manufacture, spares, repairs or lifecycle support. Margins depend on bill-of-material control, component availability, yield and how much technical responsibility the manufacturer retains. Some firms act as build-to-print suppliers, while others own more of the design, firmware, enclosure or test process. The commercial model is therefore part product sale, part engineering service, and part supply-chain management.
Who they sell to
Typical customers are original equipment manufacturers, industrial equipment suppliers, infrastructure contractors, specialist distributors and regulated-market product teams. Engineering and product managers usually shape the specification, while operations, quality and procurement teams scrutinise manufacturability, supplier risk, documentation and continuity of supply. Prototype orders may start through direct technical conversations, but repeat production tends to move into approved-supplier lists, framework agreements or formal tendering. Sales cycles are often longer than in software because the supplier may be designed into the customer’s product, tested against conformity requirements and then kept in place to avoid requalification work.
What they buy
Most electronics firms tend to spend on systems and services that protect margin, traceability and delivery reliability. Relevant categories include enterprise resource planning, material requirements planning, product lifecycle management, quality management, document control, component database management, production scheduling and test automation. Many also buy compliance advice, certification support, calibration, specialist recruitment, electronics design services, contract labour, logistics, insurance, cyber security and accountancy support for inventory-heavy operations. Suppliers with shopfloor, engineering or supply-chain use cases usually need to show how their offer fits small-batch production, design change control and audit evidence, not just office workflow.
Why and how to sell to them
Electronics buyers tend to evaluate vendors when prototype work turns into repeat production, component shortages expose manual processes, a quality audit creates remediation work, or a new product line brings fresh conformity obligations. Other triggers include a change in operations leadership, a move to outsourced assembly, growth in export activity or pressure to reduce rework and excess stock. Outbound messages usually land better when they name a specific operational constraint: shortening quote-to-build cycles, keeping technical files current, improving supplier visibility, reducing scrap, or making quality records easier to defend during customer and regulatory checks.
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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Frequently asked questions
How many electronics companies are there in the UK?
What counts as a electronics company in this list?
Which are the largest electronics companies in the UK?
What do electronics companies in the UK actually do?
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What SIC codes does this use?
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