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TIC Companies in Birmingham: 200+ Active Firms (2026)
Testing, inspection and certification companies verify conformity through testing, calibration, inspection and certification across Birmingham.
Buying demand tends to sit with quality, operations, engineering and compliance teams rather than a single central software-style buyer. Birmingham suppliers in this space usually sell to regulated product manufacturers, industrial contractors, infrastructure operators and public-sector-adjacent supply chains that need externally credible technical evidence. Engagements range from routine calibration and laboratory work to multi-site inspection programmes and certification cycles tied to procurement or market access. The better-fit providers are accreditation-led service businesses: staff competence, impartial assessment, traceable methods and clear technical reporting matter more than volume-led fulfilment.
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Birmingham has 228 actively trading TIC companies, a relatively compact local cohort serving regulated product, industrial and infrastructure supply chains. Reported employment totals 1,152 people, so the visible footprint is weighted towards smaller specialist operators rather than large multi-service networks. The local pattern appears consistent with procurement-led conformity work: buyers need site attendance, accredited laboratory capacity or inspection capability close enough to support repeat programmes. For researchers, the main caution is that turnover-ranked scale and technical scope are not the same thing; narrow accredited niches can look small while still carrying procurement-critical authority.
UK conformity assessment is organised around competence and independence rather than a single sector licence. GOV.UK describes third-party accreditation as “checking the checkers”, and government policy routes organisations seeking UK accreditation through the UK Accreditation Service (UKAS), the sole UK National Accreditation Body. Product conformity then branches by regime: UKCA and CE requirements depend on the product category, with third-party assessment and marking required in some cases but not others. OPSS guidance also places appointment of Approved Bodies and UK Notified Bodies with the Secretary of State, with appointed bodies appearing on the UK Market Conformity Assessment Bodies database.
Future movement appears likely to come from qualification breadth, auditability and buyer risk tolerance rather than a clean demand surge. Providers with recognised accreditation across adjacent technical fields tend to have an advantage when procurement teams want fewer hand-offs, but specialist laboratories and inspection teams can still defend narrow positions where methods, equipment and assessor competence are hard to substitute. The Birmingham cohort also looks exposed to skilled-labour constraints: TIC work does not scale easily without competent assessors, calibrated equipment and repeatable quality systems. Consolidation may continue where owners want succession options, though local service depth should keep room for independent specialists.
228
Active firms
2026
9
Over £5M turnover
Birmingham firms
33
Recent incorporations
Since 2022
Key facts
About 3% of the trading cohort reports turnover above £5M (9 of 228 firms) — the rest sits below that revenue band.
14% of the cohort was incorporated since 2022 (33 firms), so a sizeable share is in its first few filing cycles.
UKAS is the sole UK National Accreditation Body under the Accreditation Regulations 2009, and GOV.UK says government only recognises UKAS accreditation for UK-operating organisations.
UKCA and CE regimes cover more than 20 product types, with sector-specific rules determining whether third-party assessment and marking are required.
OPSS guidance says UK conformity assessment bodies seeking appointment as Approved Bodies for Great Britain or UK Notified Bodies for Northern Ireland are appointed by the Secretary of State and listed on the UK Market Conformity Assessment Bodies database.
One 2025 estimate values the UK TIC market at USD 15.75 billion and forecasts USD 18.72 billion by 2030 at a 3.51% CAGR; another gives 2025 UK revenue of USD 18,948.5 million and forecasts USD 26,301.9 million by 2033 at a 4.1% CAGR.
Testing is generally described as the largest UK TIC service line, while certification is commonly identified as the faster-growing service segment.
Top Birmingham TIC companies
BTI SERVICES LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides testing and inspection of cranes and lifting equipment for the construction and plant industries. Supplies and repairs lifting gear, operates a test facility, and delivers training and…
Serves UK businesses in the lifting, construction and plant sectors, including crane hire operators, contractors and equipment owners responsible for lifting equipment operations.
Financial Health
StableStable · 0% CAGR over 2y
Location
VAL PRO LIMITED
Trajectory
2y · 2022–NowFinancial sub-scores
Computed from 2 filingsProvides validation, monitoring, and calibration solutions for life sciences and regulated manufacturing. Supplies wireless data loggers, sensors, and validation software, and delivers services…
Serves regulated B2B organisations in biotech, pharmaceutical, cell and gene therapy, healthcare and food manufacturing, particularly quality, validation, calibration and operations teams managing…
Financial Health
WeakWeak · Hiring · 23% CAGR over 2y
Location
G.B. Quality Assurance (Consultants) & N.D.T. Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides calibration and repair services for precision measuring and inspection equipment through a metrology laboratory. Calibrates dimensional and mechanical gauges and, via subcontractors,…
Serves B2B organisations using precision measuring equipment and inspection gauges, including engineering, manufacturing and quality control teams with dimensional, mechanical, electrical, pressure…
Financial Health
WeakWeak · -2% CAGR over 4y
Location
MALKEN GAUGE & TOOL CO. LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures precision engineering gauges for industrial measurement and quality control. Produces plug gauges, ring gauges, setting discs, gap and depth gauges, taper and profile gauges, and custom…
Sells to B2B manufacturers and engineering firms needing precision gauging and calibration, particularly in automotive, medical, aerospace, oil and gas, and other industrial sectors in the UK and…
Financial Health
WeakWeak · -3% CAGR over 4y
Location
TENPLETH LIMITED
Trajectory
2y · 2020–NowFinancial sub-scores
Computed from 2 filingsProvides independent inspection, sampling, testing and laboratory analysis services for commodity supply chains, including oil and petrochemicals, metals and minerals, agricultural products and…
Serves B2B commodity supply-chain participants in agriculture and food, marine fuel, metals and minerals, mining, oil, gas and petrochemicals, including producers, traders, refiners, shippers and…
Financial Health
StableStable
Location
CALTECH SERVICE COMPANY LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides industrial calibration and engineering services, including on-site and laboratory calibration of temperature, pressure and flow instruments, electrical fault finding and rewiring, PLC…
Serves B2B industrial and public-sector customers, including car, component, machine tool and aircraft manufacturers, power stations, food and beverage producers, medical suppliers, hospitals and…
Financial Health
StableStable · 0% CAGR over 4y
Location
FORMEL D (UK) LIMITED
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides technical services to the automotive industry including vehicle testing and validation, software testing, quality assurance, supplier sourcing, manufacturing support, retrofit and rework,…
Serves B2B customers in the automotive industry, primarily vehicle manufacturers, OEM suppliers and manufacturing or aftersales teams needing outsourced technical, quality, testing and supply chain…
Financial Health
WeakWeak · -67% CAGR over 4y
Location
Obsidian Geo-Consulting Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides geoenvironmental and geotechnical ground investigations and site assessments for development and construction projects, identifying ground conditions and risks and producing reports to…
Serves B2B clients in the development and construction sector, including developers, contractors and project teams needing geo-environmental or geotechnical input for site assessment and ground risk.
Financial Health
WeakWeak · Hiring · 11% CAGR over 4y
Location
Evolusion Innovation
Trajectory
3y · 2020–NowFinancial sub-scores
Computed from 3 filingsProvides engineering and consulting services for offsite and traditional construction, including structural engineering and BIM, building physics and performance analysis, sustainability assessment,…
Serves B2B clients in offsite and traditional construction, including MMC providers, building product and system manufacturers, developers, contractors, and project teams needing engineering,…
Financial Health
StrongStrong · Hiring · 41% CAGR over 2y
Location
RoSPA
Provides health and safety training courses, consultancy, audits, and accreditation or awards programmes, along with guidance and resources aimed at preventing accidents in workplaces, homes, and…
Serves employers, public sector bodies and safety professionals across sectors including construction, manufacturing, healthcare, education, transport, local government and leisure, plus consumers…
Location
RoSPA
Provides health and safety training, consultancy, audits and advisory services aimed at preventing accidents in workplaces, homes and public settings. Also runs safety awards programmes, campaigns,…
Serves employers, safety managers and public-sector bodies across sectors including construction, manufacturing, healthcare, education, transport, retail and local government, alongside individuals…
Location
SARACEN COMPLIANCE SERVICES LTD
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsProvides building compliance and safety services including passive and active fire protection, fire door and damper testing, fire risk assessments, kitchen extract and ventilation cleaning, PAT and…
Serves public and private sector premises owners, NHS trusts and CCGs, in-house estates teams, and small to large facilities management companies across the UK, especially in healthcare and…
Financial Health
StrongStrong · Growing, Hiring · 55% CAGR over 4y
Location
M & E ASSET MANAGEMENT LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides mechanical and electrical (M&E) asset condition surveys and building fabric surveys for property portfolios. Conducts NHS backlog and six facet surveys, asset data capture, reporting, and…
Serves public-sector bodies, PFI/PPP stakeholders and commercial estate owners managing large built-environment portfolios, including hospitals, prisons, schools, universities, offices, industrial…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
Axiom Building Solutions Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides asbestos removal, remediation and surveying services, including asbestos surveys, air monitoring and site clearance. Also delivers RICS building surveying services such as drone and…
Serves commercial and residential property owners, business tenants, investors, high street chains, corporate occupiers, housing associations, councils and individuals needing asbestos or RICS…
Financial Health
StrongStrong · Growing, Hiring · 13% CAGR over 3y
Location
Guardian Laboratories (Midlands) Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides analytical laboratory testing and assay services, with consulting scientists conducting chemical and materials analysis for clients requiring laboratory-based examination and evaluation of…
Financial Health
DistressedDistressed · 0% CAGR over 4y
Location
WESTERN PEGASUS LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures custom spline gauges, master gears and gear inspection gauging used to measure and verify gear and spline components. Also provides calibration and inspection services for…
Serves B2B industrial manufacturers, engineering firms and quality teams that produce or inspect spline and gear components, including project engineers and calibration departments working to…
Financial Health
HealthyHealthy · -1% CAGR over 4y
Location
Birmingham Water Solutions Ltd
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides water treatment and water hygiene services including legionella risk assessments, compliance support, chlorination and disinfection, pre‑commission cleaning of pipework, air hygiene…
Serves UK businesses, building services contractors, facilities managers and property owners responsible for commercial water systems, mechanical services, cooling towers, steam boilers and…
Financial Health
HealthyHealthy
Location
Warner Surveys
Provides land and engineering surveying services for construction and infrastructure projects, including topographic and measured building surveys, underground utility detection (PAS128), site…
Serves B2B and public-sector clients in construction, property, transport infrastructure, utilities, oil and gas, industrial sites, commercial retail, healthcare and education.
Location
Borehole Solutions (North) Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides geotechnical drilling and site investigation services, including sonic and cable percussion drilling, window and windowless sampling, restricted access drilling, water well and soakaway…
Serves construction, civil engineering and development clients needing geotechnical site investigations, from small urban basement projects to large stadium schemes, across the UK and occasional…
Financial Health
DistressedDistressed
Location
Apex Height Safety Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs fall protection systems for work at height, including cable lifeline systems, guardrails, skylight protection, and fixed access equipment such as ladders, walkways and gantries.…
Serves UK businesses and organisations with staff or contractors working at height, including premises owners, facilities teams and contractors needing compliant fall protection and access safety…
Financial Health
StableStable · 0% CAGR over 4y
Location
BAUM SERVICES LIMITED
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides wind energy consultancy and measurement services, supplying and deploying wind data instrumentation including LiDAR, SoDAR and meteorological masts. Conducts remote sensing, wind resource…
Serves renewable energy developers, wind farm operators, utilities, public-sector bodies and technology partners involved in onshore, offshore and small/medium wind projects worldwide.
Financial Health
StableStable
Location
NPC AUDITING LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · 0% CAGR over 4y
Location
B.B QUALITY LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
DistressedDistressed · 0% CAGR over 2y
Location
W Clarke Robotics Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed
Location
HICKLEY LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
DistressedDistressed
Location
Geocert Ltd
Trajectory
1y · 2024–NowFinancial Health
Insufficient historyInsufficient history
Location
Ff Furbnow Limited
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
HealthyHealthy · Hiring · 233% CAGR over 1y
Location
Systems R&D Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StableStable · 0% CAGR over 2y
Location
Alison Hawes Consulting Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
DistressedDistressed
Location
Acivico
Provides building control, design and construction consultancy services for the built environment. Offers facilities management, fire safety consultancy, and project advisory services to public and…
Serves public and private sector clients in the built environment, including local authorities, combined authorities, ALMOs, housing associations and social housing providers.
Location
H2O Environmental Services Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides water treatment and water hygiene services for commercial and public buildings, including legionella risk assessments, cleaning and disinfection of water systems, and maintenance programmes…
Serves organisations nationwide across education, leisure and entertainment, manufacturing and engineering, health and social care, and building and facilities management sectors.
Financial Health
StrongStrong · Hiring · 5% CAGR over 4y
Location
Beech Technical Services Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StableStable · 0% CAGR over 2y
Location
CONVERSION AND RESOURCE EVALUATION LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · -54% CAGR over 5y
Location
S & S Insulations Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy
Location
MEDIUS-UK LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong
Location
ELITE TECHNICAL SUPPORT LTD
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
DistressedDistressed
Location
MASTER TESTING SOLUTIONS LTD
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
DistressedDistressed · 0% CAGR over 2y
Location
RA EXPERTS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
HealthyHealthy · 0% CAGR over 2y
Location
WALKER COTTER SAFETY LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides health and safety consultancy for the built environment, including CDM (Construction Design and Management) advisory services, construction site safety audits, PFI health and compliance…
Serves built environment and construction organisations, including project owners, contractors, ProjectCo boards and FM partners, with clients across PFI assets in education, healthcare and leisure.
Financial Health
WeakWeak · 0% CAGR over 2y
Location
U V BIRMINGHAM LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies UVA inspection and UVC disinfection equipment, including LED torches, disinfection towers, cabinets, and germicidal lamps. Also provides UV irradiance and dose meters, dosimeters, safety…
Serves B2B buyers in aerospace, automotive, electronics, food and beverage, healthcare and medical sectors, including teams responsible for NDT inspection, cleanliness monitoring, production hygiene…
Financial Health
StrongStrong · Growing, Hiring · 22% CAGR over 4y
Location
GAPS ENGINEERING LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
JUST GOOD HYGIENE LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides commercial ventilation hygiene services including kitchen extract and ductwork cleaning, ventilation system maintenance, fire damper testing, and deep cleaning for commercial premises, with…
Serves UK businesses with commercial premises, including commercial kitchens, building owners and facilities managers, from small independents to high street chains across varied industries.
Financial Health
StrongStrong · Growing, Hiring · 3% CAGR over 4y
Location
FLUORO-TECH LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides accredited laboratory testing and non-destructive testing services for industrial components and materials, including dye penetrant, magnetic particle, ultrasonic and radiographic…
Serves B2B engineering, aerospace, defence, automotive, energy and oil & gas companies requiring accredited laboratory and non-destructive testing support to national, international or…
Financial Health
HealthyHealthy · Hiring · 17% CAGR over 2y
Location
Woodville Holdings Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsOperates a UKAS-accredited laboratory providing materials testing for the metals and engineering sectors, including tensile, impact, bend and hardness testing, metallurgical examination, chemical…
Serves engineering and metals-industry businesses, including manufacturers, fastener and component suppliers, heat treatment firms, and project teams with quality, compliance or time-critical testing…
Financial Health
HealthyHealthy
Location
ALS LIFE SCIENCES LIMITED
Trajectory
2y · 2019–NowFinancial sub-scores
Computed from 2 filingsProvides laboratory testing, analytical services and inspection for environmental samples, food and agricultural products, pharmaceuticals, personal care products and mining materials, including…
Serves businesses and public-sector bodies in environmental management, water utilities, mining and commodities, food and agriscience, personal care, pharmaceuticals and healthcare.
Financial Health
WeakWeak · 0% CAGR over 1y
Location
RMR Materials Testing Co Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides laboratory testing services for metals and engineering components, including tensile, impact, bend and hardness testing, metallurgical examination, chemical analysis, fastener testing,…
Serves B2B customers across the metals and engineering sectors, including manufacturers, fastener producers and component suppliers that require material test evidence, inspection support or rapid…
Financial Health
HealthyHealthy · Hiring · 9% CAGR over 2y
Location
Olympia Test & Crane Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides inspection, calibration and testing services for lifting equipment and pressure vessels. Also carries out statutory inspections, crane maintenance, repair and supply of lifting gear, and…
Serves businesses of all sizes across UK industrial sectors that operate cranes, lifting equipment or pressure vessels and need compliance with safety regulations.
Financial Health
StableStable · 0% CAGR over 2y
Location
LOCAL BUILDING CONTROL LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides building control services supporting compliance with building regulations, including plan assessment, site inspections and certification for construction projects. Also offers technical…
Serves homeowners, self-builders, construction professionals, housebuilders, and commercial or housing developers involved in building projects across England and Wales.
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
SOUTH STAFFS INDUSTRIES LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides inspection, periodic testing, repair and refurbishment of gas cylinders and bottles, including LPG, propane and butane cylinders. Conducts cylinder requalification, safety certification and…
Serves B2B customers in the UK LPG and compressed gas sectors, including cylinder owners, gas distributors, fire extinguisher firms and ADR transport operators.
Financial Health
WeakWeak · -90% CAGR over 2y
Location
C3 DESIGN APPROVALS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides building control approval services, reviewing construction designs and carrying out site inspections to assess compliance with Building Regulations. Acts as a registered building control…
Serves developers, architects, contractors and property owners involved in construction projects across England and Wales that require building regulations approval and compliance support.
Financial Health
HealthyHealthy · -6% CAGR over 2y
Location
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How Birmingham TIC companies work and how to sell to them
What they do
Birmingham TIC firms usually earn revenue through service fees rather than licence income: tests priced per sample or batch, calibration charged per instrument, site inspection on day rates, and certification arranged as an initial assessment followed by surveillance audits. Larger customer relationships often sit on call-off contracts, framework agreements or retainer-style inspection programmes, especially where production schedules or infrastructure maintenance create repeat demand. The offer is a blend of technical labour, controlled methods, specialised equipment and defensible reporting. Margins tend to depend on assessor utilisation, equipment uptime, scope of accreditation and the ability to turn work round without compromising traceability or independence.
Who they sell to
Customers are typically regulated manufacturers, fabricators, construction and infrastructure contractors, utilities, medical and industrial product suppliers, and public-sector-adjacent buyers that need evidence for market access, tender compliance or internal assurance. The day-to-day sponsor may be a quality manager, engineering lead, operations director, HSE manager or compliance officer, with procurement joining once a service is repeat, multi-site or tendered. Small jobs can be bought directly by technical teams, while larger programmes tend to pass through approved-supplier lists, RFPs, framework call-offs and contract reviews. Sales cycles are usually practical rather than theatrical: proof of competence, accreditation scope, turnaround and reporting quality do much of the selling.
What they buy
TIC providers tend to buy around the constraints of regulated service delivery: laboratory information systems, scheduling and field-service tools, quality management, document control, asset registers, calibration tracking, finance, CRM and quoting software. They also spend on measurement equipment, laboratory consumables, sample handling, specialist vehicles, insurance, legal advice, accreditation support, training and technical recruitment. Security and data governance matter where customer drawings, product files, inspection photos or certificates move between sites. For sellers, the better fit is usually a tool or service that protects audit trails, reduces rework, improves technician utilisation or makes reporting easier for customers and assessors.
Why and how to sell to them
TIC buyers tend to evaluate vendors when workload becomes difficult to schedule, accreditation scope changes, a large customer asks for tighter evidence, or a tender exposes gaps in reporting, traceability or response time. Other triggers include new technical leadership, headcount growth, new laboratory equipment, a site move, succession planning or acquisition integration. Outbound messaging should avoid generic efficiency claims and speak to the economics of booked assessors, avoided retests, equipment downtime, certificate turnaround and audit preparation. Birmingham firms with industrial customer bases may also respond to suppliers that understand mixed office, lab and field workflows rather than assuming a pure software or consultancy buying motion.
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
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