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CCTV Companies in Cardiff: 81 Active Firms (2026)
CCTV companies in Cardiff install and maintain video surveillance, access control and monitoring systems for commercial sites across the city region.
Buying decisions tend to sit with facilities, estates, operations and IT/security teams, especially where cameras, access control and monitoring need to work across offices, depots, retail premises or public buildings. The buying centre is usually practical rather than speculative: site surveys, equipment specification, installation scheduling, engineer availability and post-installation support matter as much as the hardware. Cardiff suppliers in this segment are typically assessed on their ability to cover South Wales, manage multi-site work and turn ad hoc installations into maintenance, monitoring or support contracts for small and mid-market organisations.
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Cardiff has 81 actively trading CCTV firms, giving the city a defined local supplier base rather than a thin branch-office market. Reported employment totals 730 people, which points to a labour-intensive mix of surveyors, field engineers, project managers and support staff. The commercial centre of gravity appears to sit below enterprise scale, with many firms likely to depend on local relationships, repeat maintenance and responsive call-out work. For researchers, that makes Cardiff more useful as a South Wales services market than as a headquarters cluster for large national security integrators.
Commercial surveillance procurement usually crosses facilities management, IT networking and privacy governance, so suppliers need to evidence how camera placement, access permissions, retention settings and incident workflows are controlled. Public-sector and multi-site customers tend to ask for more documentation than small commercial buyers, particularly around installation records, service schedules and support response. Market structure is therefore split between electrical contractors that add surveillance work, specialist electronic security installers and firms that package monitoring or maintenance into continuing service agreements. Cardiff’s South Wales catchment makes field coverage and response discipline part of the buying decision, not just technical specification.
Service-led operators appear better placed than hardware-led installers as customers link surveillance, access control and remote monitoring into wider premises management. Cardiff’s smaller suppliers may keep winning local work where response times and engineer familiarity matter, but relatively few seem positioned to move into higher-turnover brackets without adding recurring support or multi-site contract capacity. Margin pressure is likely to come from commoditised equipment and cautious facilities budgets. The more durable part of the market should be maintenance, upgrades and compliance-led advisory work, especially for public-sector and multi-site customers that need audit trails as well as functioning cameras.
81
Active firms
2026
4
Above £5M revenue
larger-revenue operators
15
Incorporated since 2022
newer registrations
Key facts
About 4% of the trading cohort reports turnover above £5M (4 of 81 firms) — the rest sits below that revenue band.
18% of the cohort was incorporated since 2022 (15 firms), so a sizeable share is in its first few filing cycles.
Cardiff CCTV suppliers typically cover site surveys, camera networks, access control, maintenance contracts and monitoring arrangements for commercial premises.
Procurement tends to sit with facilities, security and operations teams because surveillance systems are tied to site risk, insurer expectations and building reliability.
The supplier base appears mixed, with labour-intensive installation and maintenance contractors alongside specialists that may lean more on subcontracting, monitoring income or equipment supply.
Top Cardiff CCTV companies
NORTH WEST SECURITY GROUP LTD
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsProvides design, installation and maintenance of IP‑based security camera systems and video surveillance platforms. Supplies and supports Axis and Milestone technologies, including video analytics,…
Serves business, enterprise and public-sector customers across the UK, including ports, logistics, critical infrastructure, commercial sites, education, public venues, towns and cities, health and…
Financial Health
StableStable · Hiring · 135% CAGR over 1y
Location
FAST FIRE & SECURITY TECHNOLOGIES LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides fire safety and security services including fire risk assessments, fire door inspections, fire alarm systems, fire extinguisher supply and maintenance, fire safety training, CCTV…
Serves businesses and property managers in South Wales and South West England needing contracted fire safety and security support for commercial premises.
Financial Health
StrongStrong
Location
Innovative Fire & Security Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides design, installation, commissioning and maintenance of fire and security systems, including fire alarms, CCTV, access control and intruder alarms, with project management and ongoing…
Sells mainly to businesses and site operators needing fire and security systems, especially larger or higher-risk premises. Serves sectors such as commercial property, utilities, food production and…
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 2y
Location
Cameratech Projects
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and maintains electronic security systems for commercial and residential properties, including CCTV camera systems, intruder alarms, access control, remote site monitoring, and…
Serves domestic, commercial and public sector clients across the UK, including homeowners, local businesses, offices, warehouses, retail outlets, construction sites, industrial/shipping premises,…
Financial Health
StableStable · -59% CAGR over 4y
Location
Twenty4 Fire & Security Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and maintains fire safety and security systems for homes and businesses, including fire alarms, intruder alarms, CCTV, access control, emergency lighting and fire extinguishers.…
Serves homeowners and businesses in South Wales, including Cardiff, Newport and Bridgend, with buyers responsible for property security, fire safety and compliance in domestic and commercial premises.
Financial Health
StrongStrong · Hiring · 3% CAGR over 4y
Location
Waveley Security Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs, commissions and maintains security and fire protection systems for commercial and residential properties, including CCTV, intruder alarms, access control, fire alarms, emergency…
Serves a mix of UK businesses and homeowners, from small corner shops and SMEs to large blue-chip companies, seeking premises protection and safety support.
Financial Health
StrongStrong · Growing, Hiring · 73% CAGR over 4y
Location
BLUES FIRE & INTEGRATED SERVICES LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides design, installation and maintenance of fire safety and security systems, including automatic fire detection, passive fire protection, disabled refuge alarms, intruder alarms, access…
Serves business and organisational customers needing fire, security and integrated building systems, including clients requiring electrical, fire safety, access control, CCTV and cabling services.
Financial Health
StrongStrong · Hiring · 57% CAGR over 4y
Location
Eclipse Fire & Security Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · 0% CAGR over 4y
Location
SGD PASSIVE AND SPECIALIST FIRE PROTECTION SERVICES LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable
Location
FSE Group Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides fire, security and electrical services for residential and commercial properties, including installation and maintenance of fire alarms, fire extinguishers, intruder alarms, CCTV and access…
Serves homeowners, residential customers, community centres and small commercial property owners across Cardiff, South Wales and the South West of England.
Financial Health
StrongStrong · Hiring · 14% CAGR over 3y
Location
GUARD N WATCH LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides security services including managed control room monitoring, installation of security systems, drone-based patrol and surveillance, and cyber security services to protect people, property,…
Serves businesses and organisations needing physical and digital security, including premises owners, facilities/security managers and partners requiring monitoring, security systems, drone patrols…
Financial Health
StableStable · Hiring · 9% CAGR over 4y
Location
Cyncoed Cctv Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
StrongStrong · Hiring · 26% CAGR over 3y
Location
Premier Locks & Keys Ltd
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
HealthyHealthy · 0% CAGR over 1y
Location
Portman Electronics Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides electrical and integrated communication and security systems including nurse call and dementia call systems, IP telephone systems, access control, CCTV, fire alarms, emergency lighting,…
Serves B2B customers in the UK care industry, particularly major care home providers and residential care facilities needing integrated building systems support.
Financial Health
StableStable · 0% CAGR over 4y
Location
SAFETY SECURITY SYSTEMS LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
HealthyHealthy · 0% CAGR over 2y
Location
K4 SECURITY SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides security services including manned guarding, door supervision, CCTV monitoring, mobile patrols, key holding and alarm response. Also delivers event security planning and stewarding, CCTV and…
Serves public and private sector clients across the UK, including commercial, residential, retail, corporate and industrial organisations, plus event organisers.
Financial Health
WeakWeak · -4% CAGR over 4y
Location
Tigerbay Security And Business Services Limited
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
DistressedDistressed
Location
Helmeg Security Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed
Location
FALCON VUE SECURITY LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · Hiring · 11% CAGR over 4y
Location
Firewall Security Solutions Ltd
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
DistressedDistressed · 0% CAGR over 1y
Location
Prime Certification Services (uk) Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · Hiring · 19% CAGR over 4y
Location
AZOLE CLOUD LTD
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
DistressedDistressed · 0% CAGR over 1y
Location
ADVANCED SATELLITE SOLUTIONS LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides network infrastructure and communications installation services, including Cat5e and Cat6 data cabling, LAN and WAN setup, fibre optic links, wireless networks, IP CCTV systems, and aerial…
Serves businesses of all sizes needing communications, network cabling, CCTV, wireless and connectivity infrastructure, with additional aerial installation services for domestic and commercial…
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 3y
Location
CEATON SECURITY SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong · Hiring · 22% CAGR over 3y
Location
Audio Visual Alarms Fire And Security Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and maintains electronic security and fire protection systems for commercial and public sector sites, including CCTV surveillance, intruder alarms, fire detection alarms, access…
Serves homeowners, businesses and public sector organisations, from small firms to multinationals. Target sectors include data centres, education, warehouses and medical facilities across South…
Financial Health
StableStable · -2% CAGR over 4y
Location
IDS Security Systems Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns, installs and maintains security and fire protection systems for residential and commercial properties, including CCTV surveillance, burglar alarms, fire alarms, access control and door entry…
Serves homeowners, businesses and public-sector property owners across Cardiff and South Wales, including commercial premises, offices and residential properties needing fire and security systems.
Financial Health
HealthyHealthy · Hiring · 9% CAGR over 2y
Location
INFERNO FIRE SAFETY & SECURITY SOLUTIONS LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and maintains fire safety and security systems for commercial premises, including fire alarms, fire extinguishers, emergency lighting, CCTV, intruder alarms and access control, with…
Serves B2B customers across Cardiff, Swansea, Newport, Gwent and South Wales, including care homes, multi-storey office occupiers and commercial premises needing compliant fire safety and security…
Financial Health
WeakWeak · -5% CAGR over 5y
Location
Laser Fire & Security Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsInstalls and maintains fire and security systems for residential, commercial and public sector properties, including intruder alarms, CCTV, fire alarms, access control and emergency lighting, with…
Serves a mix of domestic and commercial customers, including homeowners, schools, construction sites and retail businesses, with emphasis on Wales and the South West.
Financial Health
WeakWeak · 0% CAGR over 4y
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsSupplies and installs security and surveillance systems for businesses and sites, including CCTV, monitored intrusion detection, ANPR cameras, access control systems, gates and barriers, alarm…
Serves businesses of all sizes needing premises or temporary site security, including off-grid sites, as well as homeowners seeking security solutions.
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
Location
PROTECTORCOMMS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns, installs and maintains fire alarm systems, CCTV, intruder alarms and access control systems for residential and commercial properties. Also supplies automated gates and barriers and provides…
Sells to homeowners and businesses needing fire, CCTV, intruder and access control systems, including residential and commercial property owners and managers. Serves customers across Wales, South…
Financial Health
StrongStrong · Growing, Hiring · 20% CAGR over 2y
Location
Highcross Security & Electrical Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsInstalls and maintains security and electrical systems for residential and commercial properties, including CCTV surveillance, intruder and fire alarms, access control systems, electrical…
Serves homeowners and businesses in Gwent, including domestic, commercial and industrial property owners or managers requiring security and electrical contractors.
Financial Health
WeakWeak · 0% CAGR over 4y
Location
VOG FIRE & SECURITY LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, supplies, installs and maintains fire and security systems for residential and commercial properties, including intruder alarms, CCTV, access control, fire alarms, emergency lighting and…
Serves domestic homeowners and commercial property owners or managers, including businesses with industrial units, across South Wales and nearby areas such as Cardiff, Bridgend, Penarth, Cowbridge…
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
EUROSEC LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and maintains electronic security and fire protection systems, including intruder and burglar alarms, CCTV camera systems, access control and intercoms, automated gates and…
Serves homeowners, commercial property owners and industrial sites in Newport and Cardiff needing security and fire protection systems, including businesses requiring ongoing maintenance.
Financial Health
StrongStrong · Hiring · 32% CAGR over 4y
Location
TREMORFA GROUP LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides building engineering services including mechanical, electrical and plumbing systems, fire detection and protection, electronic security and physical security. Designs, installs and maintains…
Serves public-sector and commercial organisations, including blue light services, social housing providers, county councils, government bodies, custodial estates and schools.
Financial Health
WeakWeak · -1% CAGR over 2y
Location
LIGHTHOUSE ELECTRICAL (WALES) LIMITED
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsProvides electrical contracting services including installation of CCTV systems, fire and intruder alarms, and photovoltaic solar panels, alongside electrical work such as rewiring, fault finding,…
Serves domestic, commercial and industrial clients in South Wales, including homeowners and businesses needing electrical, security, fire alarm and solar-related installations.
Financial Health
DistressedDistressed · 0% CAGR over 3y
Location
TWISTED PAIR TECHNOLOGIES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs data and communication network infrastructure including Cat5e/Cat6 cabling, fibre optic networks, wireless links and Wi‑Fi systems. Also provides CCTV, access control, telephone…
Serves businesses and public sector organisations, including contractors, councils, hospitals, hotels, schools, IT companies and industrial sites across the UK.
Financial Health
WeakWeak · -12% CAGR over 4y
Location
Ambassador Fire & Security Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides fire protection, security, and electrical safety services, including fire risk assessments, installation and maintenance of fire alarms, extinguishers, suppression systems, CCTV, intruder…
Sells to businesses, organisations and homeowners across the UK, primarily property owners/managers and duty holders responsible for premises compliance, safety systems and ongoing maintenance needs.
Financial Health
HealthyHealthy · Hiring · 6% CAGR over 4y
Location
A.M.E ELECTRICAL LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical contracting services for commercial, industrial and residential properties, including electrical installations and maintenance, data cabling, fire alarms, CCTV and access control…
Serves businesses, public-sector bodies, homeowners and landlords across the UK, including offices, warehouses, factories, commercial premises and domestic properties.
Financial Health
HealthyHealthy · -7% CAGR over 4y
Location
Global MSC Security Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed · 0% CAGR over 4y
Location
CARDIFF ALARM SYSTEMS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
NAVIGATION SECURITY SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides security services including manned guarding, mobile patrols, key holding and alarm response. Installs and monitors CCTV systems and drone surveillance, and supplies security personnel and…
Serves UK businesses and site operators in construction, rail, infrastructure, civils, utilities, critical sites, retail, logistics and commercial property needing outsourced security coverage.
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 4y
Location
Kinsey Security Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
Curley Locks Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · 0% CAGR over 4y
Location
K9 Protection Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides manned security services including security guards, mobile patrols, key holding and alarm response. Also installs and maintains CCTV systems, intruder alarms and access control, and supplies…
Serves businesses and homeowners across South Wales, including construction sites, vacant property owners, retailers, farms, student housing operators, holiday rentals/AirBnBs, corporate clients,…
Financial Health
DistressedDistressed · 0% CAGR over 4y
Location
Steve Rogers Services Limited
Trajectory
5y · 2021–NowFinancial Health
Insufficient historyInsufficient history
Location
Rapid Deployment 365 Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak
Location
EFS Systems (Uk) Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides electrical contracting services for commercial, industrial and domestic clients, including installation and maintenance of solar PV systems, EV charging infrastructure, electrical…
Serves B2B, public-sector and residential customers: commercial and industrial premises, SMEs, NHS/hospital estates teams, organisations requiring security systems, and homeowners, with South Wales…
Financial Health
HealthyHealthy · -3% CAGR over 2y
Location
INTERLEC SYSTEMS (NEWPORT) LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides electrical installation and maintenance for domestic, commercial and industrial properties, including rewiring, fixed wire testing, data networks, fire alarms, security and CCTV systems,…
Serves domestic homeowners and landlords, plus commercial and industrial clients in South Wales, including care homes, healthcare, offices, commercial property, student accommodation and education.
Financial Health
StableStable · 0% CAGR over 2y
Location
COMTEC TELECOM AND DATA LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides network cabling installation including copper and fibre optic systems, business telephone systems and hosted VoIP solutions, broadband and leased line connectivity, and security…
Serves B2B customers, primarily businesses needing telecoms, data connectivity, network infrastructure and security system support for their premises.
Financial Health
StrongStrong · Hiring · 15% CAGR over 4y
Location
DCI ELECTRICAL (WALES) LIMITED
Trajectory
3y · 2019–NowFinancial sub-scores
Computed from 3 filingsProvides electrical engineering services including electrical design, installation, inspection and testing, commissioning, maintenance and repair, fire detection and alarm systems, CCTV and intruder…
Serves domestic customers, commercial businesses and industrial organisations, including property owners, facilities managers and project teams needing electrical engineering support.
Financial Health
StrongStrong
Location
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How Cardiff CCTV companies work and how to sell to them
What they do
Revenue usually comes from a mix of project installation, hardware margin, labour and recurring service. A typical job starts with a site survey, then a fixed quote covering cameras, recording equipment, cabling, networking, configuration and engineer time. Smaller commercial work is often one-off, but suppliers try to attach maintenance visits, call-out cover, remote support and monitoring to reduce reliance on fresh installations. Access control, alarms and intercom work often sit beside CCTV, so the commercial model is closer to building-services contracting than pure equipment resale. Margins depend on engineer scheduling, stock availability and whether support contracts keep customers engaged after installation.
Who they sell to
Customers are usually owners or operators of premises rather than consumers: independent retailers, warehouses, hospitality sites, landlords, schools, care settings, professional services offices and public bodies. The first conversation often sits with a facilities manager, estates lead, operations director or office manager, with IT involved where cameras run over existing networks. Procurement is mostly direct for small commercial sites, while councils, housing bodies and larger estates tend to use formal tenders, approved-supplier lists or written quotations from several installers. Sales cycles are typically short for urgent replacements, but longer when a multi-site roll-out needs surveys, budget approval and planned access to each building.
What they buy
Most Cardiff CCTV firms tend to spend on tools that keep field work, stock and service obligations under control. Useful categories include CRM, estimating and proposal software, field-service scheduling, job costing, inventory management, helpdesk systems and remote device monitoring. Accounting, payroll and HR tools matter once engineer teams become harder to coordinate by spreadsheet. They may also buy networking kit, test equipment, installation training, insurance, fleet services, compliance advice and outsourced marketing for local search and tender visibility. Sellers should expect practical evaluation criteria: fewer missed visits, faster quotation, cleaner documentation and better renewal tracking usually resonate more than abstract software claims.
Why and how to sell to them
Buying intent often appears when installers move from ad hoc jobs into recurring maintenance, win a multi-site customer, hire more engineers or inherit ageing systems that need upgrade plans. Pain points are operational: van scheduling, first-time fix rates, service evidence, customer permissions, retention settings, false alarms and late payment. Outbound messages work better when they tie into those pressures rather than promising general efficiency. A credible angle might show how a supplier reduces admin around site surveys, keeps service records ready for procurement review, or protects margin when hardware prices and customer budgets are tight. Cardiff firms serving South Wales will also care about route planning and response-time discipline.
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.
Also in Cardiff
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Frequently asked questions
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