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Electronics Companies in Liverpool: 45 Active Firms (2026)
Electronics companies in Liverpool design and manufacture electronic components, assemblies and equipment for industrial and regulated markets.
Purchasing tends to sit with engineering, operations, procurement and compliance teams, not a single software-style buyer. Customers are typically industrial, commercial, infrastructure or regulated organisations that need component supply, sub-system build, instrumentation, control equipment or finished electrical and electronic equipment with traceable specifications. Engagements range from prototype and low-volume assembly work to recurring mid-market supply contracts, with documentation, conformity marking, labelling and change control often part of the sale rather than an administrative afterthought. The cohort therefore skews towards suppliers that can handle engineering dialogue and production governance as well as fabrication.
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Liverpool has 45 actively trading electronics companies in this list, making it a compact local manufacturing cohort rather than a broad regional cluster. Their reported employment footprint is 511 staff, concentrated in operating businesses rather than a long tail of recent incorporations. The commercial profile points to a mixed base: some suppliers appear to have reached mid-market turnover, while many remain closer to specialist workshop, assembly-house or engineering-services scale. For researchers, the city is better read as a focused supplier base for industrial and regulated customers than as a volume electronics hub.
Product regulation, environmental obligations and market-access rules shape most activity here, rather than a single sector licence. GOV.UK guidance treats many electrical and electronic products in Great Britain and Northern Ireland as in scope for hazardous-substances controls; in-scope manufacturers need technical files, Declarations of Conformity, required labelling and the relevant conformity marking. OPSS is the named enforcement body for those rules. Electrical equipment safety, electromagnetic compatibility and radio-equipment regimes may also apply, while organisations placing EEE on the UK market face annual producer registration or producer compliance scheme duties depending on volume.
Demand appears tied less to consumer-electronics cycles than to renewal of industrial equipment, instrumentation and regulated supply chains. Liverpool suppliers with repeatable assembly processes, test capability and product-documentation discipline tend to be easier for buyers to diligence than very small design-only shops. Scale-up scarcity may keep acquisition interest focused on owner-managed firms with defensible customer relationships, though margin pressure from imported components is likely to remain a constraint. The more visible change is likely to be operational: cleaner technical files, tighter supplier assurance and earlier attention to waste-electrical obligations, rather than a sudden reshaping of the market.
45
Active firms
2026
5
Over £5M turnover
Companies with disclosed revenue
3
Incorporated since 2022
Newer registrations
Key facts
About 11% of the trading cohort reports turnover above £5M (5 of 45 firms) — the rest sits below that revenue band.
6% of the cohort was incorporated since 2022 (3 firms), so a sizeable share is in its first few filing cycles.
Electrical and electronic equipment in GB and NI may fall under the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations 2012, requiring technical documentation, a Declaration of Conformity, labelling and the relevant conformity marking.
OPSS enforces the hazardous-substances regime, while related rules can cover electrical equipment safety, electromagnetic compatibility and radio equipment.
EEE producers placing less than 5 tonnes on the UK market can register as small producers; those placing more than 5 tonnes must join a producer compliance scheme.
UK electronics value added rose from £4.1 billion in 2000 to £16.1 billion in 2024, a 5.8% CAGR.
Electronics and electrical equipment represent 10% of UK manufacturing value added and 13% of manufacturing exports, alongside trade deficits of £29 billion for electronics and £16 billion for electrical equipment.
Top Liverpool Electronics companies
J-TEQ EMS SOLUTIONS LIMITED
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides electronics manufacturing services including surface‑mount and through‑hole PCB assembly, box build assembly, and rapid prototyping. Offers PCB testing, value engineering, component…
Serves B2B electronics OEMs and product developers in aerospace, space, medical devices, industrial, telecommunications, security, oil and gas, and commercial sectors, from prototyping through…
Financial Health
WeakWeak · -71% CAGR over 4y
Location
MICRO-EPSILON UK LIMITED
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDevelops and supplies industrial sensors and measurement systems for displacement, distance, position, and thickness measurement. Products include inductive, capacitive, laser, confocal and…
Sells to businesses and OEMs needing precision measurement and sensor systems, especially industrial manufacturers, automation integrators, machine builders, electronics and semiconductor users, and…
Financial Health
WeakWeak · -70% CAGR over 4y
Location
Clarke Cables (UK) Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures cable assemblies, custom cables, looms and wiring harnesses. Designs and prototypes bespoke interconnect systems, moulded cables, plugs and connectors, and provides contract…
Serves B2B and public-sector buyers, including industrial and automotive firms, live audio/events suppliers, floorcare equipment businesses, the NHS and Ministry of Defence.
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures electrical connection components including copper busbars, braid busbars, flexible busbars, earthing products, cable assemblies and terminals. Provides kitting, sub‑assembly,…
Serves OEMs and industrial engineering teams needing electrical connection and earthing components, including customers in rail, aviation, automotive, power distribution, data centres, wind, oil and…
Financial Health
HealthyHealthy · -2% CAGR over 2y
Location
R BAKER (ELECTRICAL) LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures custom electrical transformers including single‑ and three‑phase, isolation, step‑up and step‑down units. Provides transformer rewinds, coil winding services, control panel design and…
Serves B2B and public-sector customers, including defence and military organisations, industrial manufacturers, float glass plants, marine and offshore operators, rail, education, hazardous-area…
Financial Health
StableStable · 4% CAGR over 2y
Location
CIRCUIT HYDRAULICS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · -68% CAGR over 4y
Location
BRAINBOXES LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · Hiring · 6% CAGR over 4y
Location
Forwessun Total Solutions Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides design and manufacture of PCB test fixtures and functional test systems, including in‑circuit test fixtures for HP, Teradyne and GenRad platforms. Also offers test software development,…
Serves B2B electronics manufacturers, PCB assemblers and test engineering teams using HP 3070, Teradyne and GenRad platforms, including customers with global production or rental capacity needs.
Financial Health
WeakWeak · 0% CAGR over 2y
Location
United Automation Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures industrial power and temperature control equipment including AC voltage regulators, thyristor and soft‑start controllers, solid state relays, motor and fan controllers, infrared heater…
Sells to B2B customers including industrial OEMs, electrical engineers, panel builders, HVAC and process-heating firms, and commercial catering equipment businesses.
Financial Health
HealthyHealthy · 2% CAGR over 2y
Location
NORTHERN DESIGN ENGINEERING LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures electrical sub‑metering systems and energy monitoring equipment, including multifunction meters, modular metering systems, current transformers, Rogowski coils, transducers,…
Serves businesses and organisations managing energy use in non-domestic buildings, including facilities and energy managers, installers, and software partners across commercial and industrial sites.
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
Majas Switchgear Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures electrical switchgear and power distribution equipment, including HV/LV packaged substations, low‑voltage switchboards, power distribution units and motor control panels.…
Sells to B2B customers including electrical engineers, consultants, electrical contractors and other switchgear manufacturers needing HV/LV power distribution equipment and support for electrical…
Financial Health
WeakWeak · 2% CAGR over 2y
Location
Goodwin Electronics Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures industrial motion control systems, electronic positioning equipment and cabinet-based control panels. Develops embedded and PLC control software, produces custom PCBs,…
Serves B2B industrial customers, including engineering teams, manufacturers and system integrators needing motion control, electronic positioning, control software, PCBs, cabinets and industrial…
Financial Health
WeakWeak · 0% CAGR over 2y
Location
Axle Weight Technology Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures axle weighing systems for commercial vehicles, including dynamic axle weighbridges, static single‑axle weighbridges, onboard axle load indicators, and portable weighpads,…
Serves B2B and public-sector operators of heavy goods vehicles, fleets and industrial sites that need axle load and vehicle weight compliance solutions.
Financial Health
StrongStrong · Growing · 1% CAGR over 2y
Location
Plastech Control Systems Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures leak detection and quality control equipment for the blow moulding industry, including conveyor‑fed bottle leak detectors, trimmers, bottle handling and conveyor systems. Also provides…
Sells B2B to the blow moulding industry, including system integrators, OEMs and end-users buying bottle handling, leak detection and quality control equipment. Serves customers worldwide, with many…
Financial Health
StrongStrong · Growing, Hiring · 4% CAGR over 4y
Location
HYPEREV LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak
Location
C.I.S.E. Manufacturing Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures electrical control, telemetry and security panels, including PLC-based control systems, motor control centres and relay logic enclosures. Provides installation,…
Serves B2B industrial and infrastructure organisations, including utilities, food manufacturers, seafood processors, construction contractors and engineering firms requiring bespoke electrical…
Financial Health
StableStable · 0% CAGR over 2y
Location
Trojan Lighting Solutions Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures LED lighting systems for commercial, healthcare, education, retail and public sector buildings. Provides lighting design, site surveys, retrofit upgrades, smart lighting…
Serves B2B and public sector buyers, including facilities managers, estates teams and contractors in healthcare, education, commercial offices, retail, industrial sites, car parks and intelligent…
Financial Health
StrongStrong · Hiring · 63% CAGR over 4y
Location
INTELLITEC MV LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, manufactures and distributes electrical power distribution and control systems for specialist vehicles, marine and off‑grid applications. Supplies batteries, inverters, DC‑DC converters,…
Serves B2B and consumer customers needing vehicle, marine, mobile leisure and off-grid electrical systems, including specialist vehicle operators, ambulance providers, mobile catering businesses and…
Financial Health
HealthyHealthy · -66% CAGR over 4y
Location
PHASE 3 CONNECTORS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures and sells industrial electrical power connectors and related equipment, including single‑pole plugs, sockets, distribution boxes and cable connectors used for high‑current power…
Serves B2B customers needing high-current power distribution, including electrical utilities, temporary power providers, industrial project contractors, distributors, and stage lighting/entertainment…
Financial Health
HealthyHealthy · -64% CAGR over 4y
Location
Bomac Electric Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures electric heating elements and heating products for appliances, commercial catering equipment, and industrial and commercial heating systems. Also develops oil management…
Serves B2B customers including global appliance manufacturers, commercial catering equipment firms, commercial heating companies, packaging and bulk-liquid handlers, data centre builders and…
Financial Health
StableStable · 0% CAGR over 4y
Location
Deva Electronic Controls Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDesigns and manufactures PC‑based motion control and position measurement products, including controllers, encoder interfaces, optical measurement hardware and signal conversion devices. Supplies…
Sells to OEMs and industrial end-users needing motion control, position measurement and CMM hardware, including manufacturers and retrofitters of automatic or manual coordinate measuring machines and…
Financial Health
StableStable · 0% CAGR over 3y
Location
Isothermal Technology Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures precision temperature measurement and calibration equipment, including thermometry bridges, fixed‑point cells, calibration baths, furnaces, probes and infrared calibrators.…
Sells to calibration laboratories, National Metrology Institutes, and industrial engineering teams needing precision temperature measurement and calibration equipment. Serves sectors including…
Financial Health
HealthyHealthy · 3% CAGR over 2y
Location
Axis Controls (NW) Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, builds and installs bespoke industrial electrical control panels and automation systems. Provides PLC, touchscreen and SCADA control systems, safety and servo systems, and supplies…
Serves UK OEMs and industrial end users, particularly manufacturers and engineering teams in food and beverage, FMCG, pharmaceuticals, extrusion, winding and web processing.
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
Calon Associates Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, manufactures and supplies intelligent lighting control systems, sensors and controllers, including DALI-based products, forecourt monitoring systems and building control solutions. Also…
Serves commercial, retail, transportation and education organisations, plus fuel forecourt and convenience-store operators across Europe; typical customers include offices, airports, banks,…
Financial Health
StrongStrong · Hiring · 9% CAGR over 4y
Location
Norcott Technologies Limited
Trajectory
5y · 2021–NowFinancial sub-scores
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…
Financial Health
HealthyHealthy · -68% CAGR over 4y
Location
Act Meters (UK) Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops and supplies battery testing equipment for alarm and standby power systems, including testers for lead‑acid and sealed lead‑acid batteries. Also provides calibration services for test…
Sells through distributors to alarm, fire and security system installers, maintenance engineers and technicians, with distribution across North America, Europe and Australia.
Financial Health
HealthyHealthy · Growing, Hiring · 12% CAGR over 2y
Location
Ultracell (UK) Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsManufactures and supplies rechargeable batteries and energy storage products, including VRLA, AGM and gel batteries, for telecommunications systems, renewable energy installations, backup power and…
Serves B2B customers in telecommunications, renewable energy and industrial sectors, including infrastructure operators, energy system providers and industrial equipment users worldwide.
Financial Health
HealthyHealthy · Profitable · 0% CAGR over 2y
Location
TANK GAUGING SERVICES LTD
Trajectory
1y · 2024–NowFinancial Health
Insufficient historyInsufficient history
Location
EKATON LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures electrical contacts and components for switchgear, including copper and brass contacts, silver and tungsten alloy contacts, carbon brushes, shunt connectors, and insulated parts. Also…
Serves B2B customers including electrical equipment manufacturers, switchgear refurbishment and maintenance providers, industrial end users, and motor maintenance teams requiring high- and…
Financial Health
WeakWeak · -69% CAGR over 4y
Location
Acorn2Oak Innovation Solutions Limited
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · 0% CAGR over 5y
Location
Noon Engineering Ltd
Trajectory
3y · 2024–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StableStable
Location
AUTO MARINE CABLES INTERNATIONAL LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsManufactures and distributes electrical cables for automotive, marine and leisure vehicle applications, including battery, thin‑wall and multi‑core cables. Supplies corrosion‑resistant tinned marine…
Serves B2B customers including distributors, OEMs and installers in the automotive, marine, caravan and allied sectors, supporting land and sea projects worldwide.
Financial Health
WeakWeak · 0% CAGR over 2y
Location
Total Automation and Control Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical engineering and automation services, including PLC and PAC programming, SCADA systems, control panel manufacturing, electronic repairs, and electrical design, installation and…
Serves B2B industrial customers in the UK and worldwide, including food, beverage and pharmaceutical manufacturers, refrigeration system operators and marine businesses.
Financial Health
StableStable · Hiring · 28% CAGR over 4y
Location
EPC CONTROLS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, manufactures and installs building management systems and custom control panels. Provides system design, panel fabrication, installation and commissioning services for building automation…
Serves organisations managing buildings and facilities, including education, healthcare, leisure, retail and commercial clients, from single-site projects to larger integrated estates.
Financial Health
StableStable · -4% CAGR over 4y
Location
Tokyo Technology Limited
Trajectory
1y · 2024–NowDesigns and supplies semiconductor manufacturing equipment used in wafer processing, including coating, developing, etching, deposition, and thermal processing systems, and provides related…
Serves semiconductor manufacturers, foundries, integrated device manufacturers and chip R&D organisations worldwide, especially teams operating wafer fabrication and advanced process development…
Financial Health
Insufficient historyInsufficient history
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and supplies ATEX-certified lighting systems for hazardous industrial environments. Provides LED luminaires, explosion‑proof enclosures, isolators and control equipment, along with lighting…
Serves B2B operators of hazardous industrial sites, including petrochemical, petroleum, pharmaceutical, wastewater, agribusiness, ports, offshore/onshore facilities, chemical warehouses, refineries…
Financial Health
StableStable
Location
QRS 2012 LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong
Location
CONFORMANCE QUALITY CONSULTANTS LIMITED
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
HealthyHealthy
Location
Jka Electronics Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides electronic design and engineering services for commercial, industrial, medical and automotive applications, including prototyping, production support, documentation, worst case circuit…
Serves B2B customers in commercial, industrial, medical and automotive sectors, including engineering and product development teams needing electronics design, manufacturing support and testing.
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 5y
Location
E.S.L. ELECTROMECH LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides machining and fabrication services, manufacture and repair of transformers and coils, and electrical engineering work including design, installation, repair and upgrading of electrical and…
Serves industrial and engineering businesses, including operators of machinery, electrical systems, transformers and coils requiring manufacture, repair, upgrades or breakdown response.
Financial Health
StableStable · -66% CAGR over 4y
Location
TRITEC DEVELOPMENTS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides electronics development and control systems engineering services, including digital and analogue hardware design, PCB layout, embedded and PC software development, mechanical design and…
Sells to businesses across the UK needing electronics development and control systems engineering, including manufacturers and industrial organisations in sectors such as aerospace, energy, food…
Financial Health
WeakWeak · 0% CAGR over 2y
Location
SURE ANTENNAS LTD
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsDesigns and manufactures 4G and 5G vehicle antennas for emergency service and critical communications vehicles, including multifunction LTE, TETRA and GPS antennas, covert antennas, and related…
Serves emergency services, public sector fleet teams, and critical communications resellers or installers managing ambulances, police, fire, covert and motorbike vehicle fleets.
Financial Health
StableStable · -74% CAGR over 3y
Location
Thermal Developments International Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures precision wire‑wound platinum resistance temperature detector (RTD) sensing elements, including Pt25, Pt100 and Pt1000. Supplies components for platinum resistance thermometers used in…
Serves B2B buyers including thermometer manufacturers, industrial temperature solution providers, calibration laboratories, and engineering teams in aerospace, automotive, energy, manufacturing,…
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
MULTI CIRCUIT METERING UK LTD
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
StableStable · -78% CAGR over 3y
Location
MOTHERWELL TANK GAUGING LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed · -75% CAGR over 4y
Location
BLACKMAGIC DESIGN LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures digital film and broadcast production equipment and software, including cinema cameras, video switchers, capture and playback cards, routers, streaming encoders and the…
Serves film, television, post-production and broadcast professionals, including studios, production companies, live event producers, editors, colorists and media organisations worldwide.
Financial Health
WeakWeak · -5% CAGR over 4y
Location
BCD SOLUTIONS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed
Location
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How Liverpool Electronics companies work and how to sell to them
What they do
Electronics companies in Liverpool usually earn revenue through made-to-order manufacturing, component distribution, design-for-manufacture support, repair, calibration, test and recurring supply of sub-assemblies or finished equipment. Pricing is typically quote-led: non-recurring engineering for prototypes and tooling, unit pricing for production runs, service day rates for engineering support, and framework or call-off terms for repeat customers. Gross margin depends on bill-of-materials control, component availability, yield, warranty exposure and documentation effort, so sales teams often need to qualify specification stability before accepting volume commitments.
Who they sell to
Most sell to industrial OEMs, facilities operators, utilities contractors, healthcare-adjacent equipment buyers, transport suppliers and public-sector or education buyers needing instrumentation, control cabinets, sensors, assemblies or compliant electrical goods. Buying groups tend to include engineering managers, operations directors, procurement leads, quality managers and, for regulated use cases, compliance or health-and-safety staff. New customers often arrive through direct enquiry, approved-supplier lists, referrals or tender portals. Sales cycles are usually longer when a part must be qualified, tested and documented before production release.
What they buy
Most electronics firms tend to spend on systems and services that reduce production errors, improve traceability and protect margins on component-heavy work. Relevant categories include ERP and materials-requirements planning, inventory and purchasing tools, quality management, test automation, CAD and product-lifecycle management, cyber security, document control, field-service software, CRM, finance, HR and payroll. They also buy calibration, certification support, environmental compliance advice, insurance, freight, recruitment for technicians and engineers, and outsourced marketing when they need to reach industrial buyers beyond existing account relationships.
Why and how to sell to them
Electronics buyers tend to evaluate vendors when component costs move, customer audits expose gaps, a production run moves from prototype to repeat build, or a larger customer asks for tighter reporting. Other triggers include a new operations or finance hire, workshop expansion, a product entering regulated markets, or preparation for annual producer registration. Outbound tends to work when it is specific to their operating model: reduce rework, shorten quotation cycles, improve stock visibility, evidence conformity work, or make customer documentation less dependent on one senior engineer.
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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