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Solar Installation Companies in Leeds: 53 Active Firms (2026)
Solar installation companies in Leeds design, fit and maintain photovoltaic systems for residential, public-sector and commercial sites.
Buying decisions usually sit with estates teams, housing providers, facilities managers, landlords and householders rather than a single energy buyer. The commercial side tends to value survey capacity, electrical competence, roofing coordination and aftercare, while public-sector work brings procurement discipline and documentation. Residential demand is more fragmented, often linked to roof suitability, payback expectations and local installer availability. Engagements are usually local project contracts rather than enterprise platform relationships, with contractors expected to manage site assessment, installation logistics and maintenance across Leeds and nearby urban areas.
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Leeds has 53 actively trading solar installation companies, making this a relatively narrow local cohort rather than a broad national supply base. Reported employment across the cohort totals 394 people, which points to a market made up largely of owner-managed contractors and small delivery teams, with only a limited number of firms operating at larger commercial scale. For researchers, that matters because capacity is likely to vary by job type: domestic and smaller commercial work may be widely serviceable, while larger estates programmes will depend on a thinner group with project-management depth and electrical delivery capacity.
Planning, building-control and grid-connection requirements shape the sales cycle more than conventional sector licensing. Contractors need to coordinate roof condition, structural suitability, electrical certification, insurance, access arrangements and aftercare, particularly where installations sit on schools, council assets, housing stock or occupied commercial buildings. Market structure is also tied to adjacent trades: roofing, electrical contracting, heating, energy-efficiency retrofit and facilities management can all feed installation work. That creates a mixed contractor base, where solar capability may be either the core business or part of a broader building-services offer.
Demand appears to be moving towards contractors that can handle site survey, installation and post-installation maintenance without handing the customer between too many parties. Public estates and commercial landlords tend to favour suppliers that can evidence process discipline, while household demand remains more exposed to payback confidence and finance conditions. The Leeds cohort looks likely to stay practical and locally anchored, with some consolidation possible around contractors that combine solar, electrical work and wider retrofit services. Scarcity is more likely to show up in delivery capacity than in customer interest.
53
Active firms
2026
6
£5M-plus firms
reported revenue
10
New since 2022
incorporations
Key facts
About 11% of the trading cohort reports turnover above £5M (6 of 53 firms) — the rest sits below that revenue band.
18% of the cohort was incorporated since 2022 (10 firms), so a sizeable share is in its first few filing cycles.
Leeds solar installers sit between energy procurement, building works and long-life maintenance, rather than fitting neatly into one trade category.
Local suppliers serve residential, public-sector and commercial sites, with buying processes that can differ by building type and ownership model.
Project-led delivery appears common, with some larger local installers likely to use subcontracting or partner delivery alongside permanent teams.
Top Leeds solar installation companies
S.ELECTRIX LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical contracting services including design, installation, testing and maintenance of commercial, industrial and domestic electrical systems. Installs LED lighting, fire alarms,…
Serves a mix of B2B and B2C customers in Leeds/West Yorkshire: commercial and industrial premises, construction/property clients, workplaces, public sites, and domestic homeowners.
Financial Health
HealthyHealthy
Location
FUTURE POWER TEAM LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsInstalls solar photovoltaic systems and battery storage for homes and businesses. Services include in-roof and off‑grid solar installations, commercial solar for farms and warehouses, system…
Serves homeowners and businesses across Yorkshire, including factories, warehouses, farms and agricultural operators, seeking residential or commercial solar and battery systems.
Financial Health
StrongStrong · Growing, Hiring · 36% CAGR over 3y
Location
Associated Clean Technologies Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides consultation, design and installation of renewable energy systems, including solar photovoltaic (PV) arrays, battery storage and electric vehicle charging points for residential, commercial…
Serves homeowners, businesses and organisations managing complex or heritage properties across Yorkshire and the UK, including residential, commercial and landmark-site clients.
Financial Health
StrongStrong · Hiring · 29% CAGR over 2y
Location
Heron Electrical Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides electrical contracting and renewable energy installation services for residential, commercial and agricultural properties, including solar PV systems, battery storage, EV charging points and…
Serves homeowners, domestic retrofit customers, new-build property developers, and commercial or agricultural premises in Yorkshire and across the UK, from small businesses to larger corporations.
Financial Health
StrongStrong · Hiring · 70% CAGR over 2y
Location
Leeds Mechanical and Electrical Services Ltd
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides mechanical and electrical engineering services including system design, installation, commissioning and maintenance for commercial developments and residential construction. Also installs…
Serves commercial developers, housebuilders, factory/PV farm operators and domestic construction clients in the North of England, plus interior designers and boutique kitchen and bathroom installers…
Financial Health
HealthyHealthy · Hiring · 73% CAGR over 2y
Location
POWER AND CONTROL INSTALLATIONS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs electrical and renewable energy systems for residential and commercial properties, including solar PV arrays, EV charging points, and energy‑efficient electrical infrastructure.…
Serves UK commercial clients, including offices, education providers and other organisations with high energy needs, alongside homeowners seeking residential energy upgrades.
Financial Health
StrongStrong · Growing, Hiring · 3% CAGR over 4y
Location
Nationwide Safety Management Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical installation and inspection services, fire risk assessments and alarm systems, solar PV and EV charging installations, data cabling and network setup, CCTV and access control…
Serves businesses, landlords, property managers, retailers, hospitality groups, education providers and commercial property owners, with some coverage of domestic dwellings and multi-tenant…
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
NORTHERN HEAT LINK LTD
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides plumbing and heating services including boiler installation, servicing and repairs, heating system design and installation, radiators and underfloor heating. Also installs air source heat…
Serves homeowners in the Leeds area, plus individual landlords and property managing agents responsible for rental properties and tenant access.
Financial Health
StrongStrong · Growing · 0% CAGR over 3y
Location
Provides energy efficiency and renewable energy infrastructure projects, including solar, wind, biogas, energy storage and microgrids. Delivers design, construction, financing and operation of energy…
Serves UK public sector bodies and businesses, including councils, universities, healthcare facilities, retailers, commercial and industrial organisations, utilities, housing providers, data centres…
Location
Morton Brothers Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides mechanical and electrical contracting services including design, installation, testing and maintenance of electrical, heating, plumbing and renewable energy systems. Also installs home…
Serves commercial and industrial clients needing mechanical and electrical contracting, and also sells to domestic homeowners seeking smart home, home cinema, heating, renewables and electrical…
Financial Health
StableStable · Hiring · 33% CAGR over 3y
Location
NATIONWIDE RENEWABLES LTD
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsInstalls residential solar photovoltaic systems and related energy technologies. Services include supply and installation of solar panels, battery storage, solar water heating, smart heating…
Targets residential homeowners in Leeds and nearby areas who want to reduce household energy bills and qualify for home renewable-energy schemes.
Financial Health
StrongStrong · Growing · 0% CAGR over 2y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides building services engineering for construction and fit‑out projects, including design and installation of mechanical and electrical systems, air conditioning, fire and security systems, and…
Serves main contractors, fit-out contractors and commercial end-user organisations across the UK, particularly clients managing construction, refurbishment and facilities projects requiring building…
Financial Health
HealthyHealthy · -66% CAGR over 4y
Location
Supplies renewable electricity to industrial and commercial customers using power generated from UK wind and solar farms. Also installs commercial rooftop solar systems and offers power purchase…
Serves UK industrial and commercial businesses seeking renewable energy supply, rooftop solar and carbon reduction support, particularly organisations with ESG, net-zero or supply-chain emissions…
Location
Supplies 100% renewable electricity from wind and solar farms to industrial and commercial customers. Also installs commercial rooftop solar systems and offers power purchase agreements and energy…
Serves UK industrial and commercial businesses seeking renewable energy options, including companies with ESG, carbon reduction, supply-chain emissions or on-site solar generation goals.
Location
XEROGRID LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and installs off-grid solar power systems and battery storage for residential, agricultural and industrial sites, including standalone solar arrays, energy storage and related power…
Serves a mix of UK consumers and businesses, including homeowners, farms and agricultural operators, and industrial sites requiring off-grid power and battery storage.
Financial Health
WeakWeak · Hiring · 15% CAGR over 2y
Location
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsInstalls and services residential solar energy systems including solar photovoltaic (PV) panels and solar thermal water heating systems. Also provides battery storage solutions, upgrades for existing…
Serves UK homeowners seeking domestic renewable energy and water treatment solutions, including households with existing solar thermal systems needing servicing or upgrades.
Financial Health
WeakWeak · 0% CAGR over 2y
Location
SWITCH ENERGY NETWORK LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsInstalls residential energy efficiency improvements through government schemes such as ECO4, including cavity, loft and wall insulation, solar PV and solar thermal systems, double glazing, heating…
Serves homeowners and tenants in England, particularly low-income households or benefit recipients eligible for ECO4/Green Homes Grant funding and residential energy-efficiency support.
Financial Health
HealthyHealthy · -77% CAGR over 3y
Location
Greenview Projects Electrical Division Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical contracting services including inspections, rewiring, fuse board upgrades, lighting, CCTV and maintenance, and installs solar PV systems, battery storage and EV chargers for…
Serves homeowners, landlords, commercial businesses, industrial sites and public sector organisations, primarily across West Yorkshire and the UK, including retail and logistics businesses.
Financial Health
StrongStrong · Hiring · 10% CAGR over 4y
Location
ARK ELECTRICAL PROJECTS LTD
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides installation of solar photovoltaic systems, battery storage and electric vehicle charging points for residential and commercial properties. Also delivers domestic, commercial and industrial…
Serves homeowners and businesses in West Yorkshire, including domestic, commercial and industrial customers in Wakefield, Leeds, Bradford, Huddersfield and Barnsley.
Financial Health
StrongStrong · Hiring · 10% CAGR over 2y
Location
DUNCAN RENEWABLES LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs commercial solar photovoltaic systems and renewable energy technologies for industrial, agricultural and commercial sites. Provides battery storage integration and operation and…
Sells to commercial and industrial businesses seeking solar PV, battery storage and renewable energy systems, particularly across agriculture, manufacturing, food, offices, hospitality and other…
Financial Health
StrongStrong
Location
PURELEC ENERGY LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsInstalls solar photovoltaic systems and battery storage for residential and commercial properties. Provides in‑roof solar panels, solar roof tiles, Tesla Powerwall and GivEnergy storage systems,…
Serves homeowners and commercial organisations in Yorkshire, including domestic property owners, industrial firms and commercial premises seeking solar PV, battery storage and electrical project…
Financial Health
HealthyHealthy · -3% CAGR over 4y
Location
Elite Electrical Contractors Yorkshire Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides domestic, commercial and industrial electrical contracting services including rewiring, fuse board replacement, PAT testing, electrical inspections, outdoor power installations, and…
Serves homeowners, landlords, commercial businesses and industrial sites needing electrical contractors, plus domestic and commercial clients needing scaffolding, primarily across Wakefield and West…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
ARTISAN ELECTRICAL & SECURITY LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical installation, maintenance, testing and inspection for domestic, commercial and industrial properties. Installs solar PV systems, battery storage and EV chargers, and offers…
Serves homeowners, landlords, offices, commercial premises and industrial facilities in Halifax, Bradford, Leeds, Huddersfield, Brighouse and surrounding areas.
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
Coretech Electrical Services Limited
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and commissions solar photovoltaic systems, battery storage and electric vehicle charging points for residential and commercial properties. Also supplies related equipment and…
Serves UK homeowners and business owners seeking renewable energy upgrades, including commercial clients in the NHS, schools, academies, transport and manufacturing sectors, plus fleet operators and…
Financial Health
WeakWeak · -6% CAGR over 4y
Location
SRM SOLAR LIMITED
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsDesigns, supplies and installs solar photovoltaic systems and battery energy storage for residential and commercial buildings. Also installs heat pumps, ventilation heat recovery and related energy…
Serves homeowners, commercial property owners, first-tier contractors and housing associations, including organisations delivering government-funded energy-efficiency projects nationwide.
Financial Health
StrongStrong · Growing, Hiring · 125% CAGR over 1y
Location
Sol Group West Yorkshire Ltd
Trajectory
1y · 2025–NowDesigns and installs commercial solar photovoltaic systems for businesses and public sector organisations. Provides solar project planning, installation, operation and maintenance services, along…
Serves UK businesses and public sector organisations, including warehousing, logistics, manufacturing, construction, retail, hospitality, healthcare, education, farming and agriculture operators.
Financial Health
Insufficient historyInsufficient history
Location
CAPRICORN PLUMBING AND HEATING PROJECTS LTD
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides plumbing, heating, electrical and renewable energy services for commercial and domestic properties, including HVAC and mechanical maintenance, bathroom installations, ground source heat…
Targets commercial property owners, facilities managers and businesses with workspaces across Yorkshire and the UK, alongside homeowners needing domestic property works.
Financial Health
StrongStrong · Hiring · 41% CAGR over 2y
Location
N2 PROJECTS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides electrical contracting services for domestic, commercial and industrial clients, including electrical installations, rewiring, testing and inspections, emergency lighting, fire alarms and…
Serves commercial, industrial and retail businesses, landlords and domestic homeowners, including customers seeking renewables, EV charging and solar support, regionally and nationwide.
Financial Health
StableStable · Hiring · 61% CAGR over 2y
Location
Heatwise Energy Solutions Yorkshire Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides heating, plumbing and electrical services including boiler installation and repair, air source heat pump systems, solar PV and battery storage, EV charger installation, and air conditioning…
Serves residential homeowners and commercial customers across Pontefract and West Yorkshire, including larger businesses seeking ongoing heating or electrical contract support.
Financial Health
StableStable · -5% CAGR over 4y
Location
EV Chargers & Electricals Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsInstalls electric vehicle charging points for residential and workplace use, including supply and fitting of chargers. Provides electrical installation services and installs solar PV panels and…
Serves homeowners, renters and flat owners, plus workplaces and commercial clients across West Yorkshire and surrounding areas needing EV charging, solar or battery installations.
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 2y
Location
RVC Electrical Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides electrical design, installation and maintenance services for commercial and industrial premises, including lighting and power distribution, solar PV systems, fire alarm installation and…
Serves businesses with commercial and industrial premises across Yorkshire, including facilities and property managers, plus homeowners seeking domestic electrical testing or EV charging support.
Financial Health
WeakWeak · Hiring · 8% CAGR over 3y
Location
HAWLEY BUILDING SERVICES LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides mechanical, electrical, and public health engineering services for commercial and industrial buildings, including design, installation, and maintenance of HVAC, plumbing, ventilation, power…
Serves commercial and industrial organisations across the UK seeking turnkey M&E contractors for building projects, maintenance, and sustainability upgrades.
Financial Health
StrongStrong · Growing, Hiring · 26% CAGR over 4y
Location
Dines Installations Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsInstalls photovoltaic (PV) solar panel systems for residential and commercial properties, including system setup, electrical connection and related installation services for on-site solar power…
Financial Health
StableStable · -13% CAGR over 3y
Location
Eco Partners Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsInstalls and maintains renewable energy systems for homes and businesses, including solar PV panels, in‑roof solar systems, battery storage, and air source heat pumps. Also provides electric vehicle…
Serves UK homeowners and businesses seeking to reduce energy costs and carbon emissions, including households, commercial premises and electric vehicle owners adopting renewable energy upgrades.
Financial Health
StrongStrong · Growing, Hiring · 13% CAGR over 4y
Location
The Green Deal Factory Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsSupplies and installs domestic boilers, including Worcester Bosch, Ideal and Vaillant models. Provides online boiler quotes, heating system installation, servicing and repairs, and renewable energy…
Serves homeowners, landlords and businesses needing boiler, heating, renewable energy, EV charging and electrical safety support, including landlord-specific service plans and commercial boiler or…
Financial Health
WeakWeak · Hiring · 3% CAGR over 5y
Location
SPARK ENERGY UK LIMITED
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsDesigns and installs residential and commercial solar panel and battery storage systems, electric vehicle chargers, and heat pumps. Provides renewable energy systems and related installation services…
Serves homeowners across mainland Great Britain, alongside businesses needing commercial-scale energy systems and schools through dedicated programmes.
Financial Health
StrongStrong
Location
West Yorkshire Gas Solutions Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides installation and maintenance of heating, renewable energy and energy efficiency systems, including solar PV, heat pumps, boilers, EV chargers and insulation. Works with homeowners,…
Serves a mix of B2C, B2B and public sector customers, including homeowners using government energy-efficiency grants, building contractors, and local authorities in need of domestic property upgrades.
Financial Health
StrongStrong · Growing, Hiring · 31% CAGR over 4y
Location
SERVICE 2 (HVAC) LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides installation and maintenance of HVAC and mechanical systems, commercial electrical services, and life safety systems including fire alarms and emergency lighting. Also designs and installs…
Serves commercial, industrial and domestic customers across the UK, including education, healthcare, hospitality and retail organisations, plus small to medium commercial building operators needing…
Financial Health
WeakWeak · -42% CAGR over 4y
Location
SUBLIME ENERGY SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides home energy efficiency upgrades under the UK ECO4 scheme, including insulation, boiler and central heating replacements, solar panels, and air source heat pumps. Conducts eligibility checks,…
Serves UK households eligible for ECO4 grants, particularly low-income or vulnerable homeowners and private property occupants claiming qualifying benefits with inefficient EPC-rated homes.
Financial Health
StrongStrong · Hiring · 17% CAGR over 4y
Location
E7 ELECTRICAL SERVICES (7 GROUP) LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical installation and testing services and installs electric heating systems including storage heaters, instant heaters and electric radiators, as well as solar PV panels, battery…
Serves residential customers and homeowners considering upgrades to electric heating, storage heaters, hot water, solar PV or battery storage, particularly those seeking surveys and quotations for…
Financial Health
StrongStrong · Hiring · 53% CAGR over 4y
Location
The Construction Circle Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides home energy efficiency improvements under the UK ECO scheme, including installation of replacement boilers, first-time central heating systems, and insulation for lofts, walls, floors, and…
Serves residential homeowners, including those eligible for UK ECO or GBIS energy-efficiency grants and private household customers who do not qualify but want financed home upgrades.
Financial Health
StrongStrong · Growing, Hiring · 55% CAGR over 5y
Location
CROFT ROOFING LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides roofing installation, repair and refurbishment services for residential and heritage properties, including roof slating and tiling, leadwork, GRP and felt roofing, shingle roofs, skylights…
Serves homeowners, property owners and trade professionals in Wharfedale and Yorkshire, including owners of older or heritage buildings and clients involved in new builds or extensions.
Financial Health
StableStable · -70% CAGR over 4y
Location
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How Leeds solar installation companies work and how to sell to them
What they do
Solar installation contractors in Leeds earn revenue from site surveys, system design, equipment supply, installation labour, electrical commissioning and maintenance. Most work is project-priced, with domestic customers paying deposits and staged balances, while commercial and public-estate jobs are more likely to use fixed quotes, tender submissions and retained aftercare. Margins sit across labour utilisation, procurement of panels, inverters, batteries and mounting kit, and the ability to sequence roof access, electrical work and inspection without repeat visits. A smaller group also sells monitoring, remedial work and planned maintenance, which creates recurring service income once the initial installation is complete.
Who they sell to
Typical buyers range from householders with suitable roofs to facilities managers overseeing warehouses, schools, offices and managed housing. Commercial decisions usually involve a property or estates lead, a finance director or owner-manager, and sometimes an external consultant where energy use, roof loading or payback modelling needs validation. Public-sector and housing-provider work tends to pass through procurement teams, with more attention on insurance, method statements, certification, health and safety files and aftercare obligations. Domestic sales are more direct and referral-led; commercial sales usually need a survey, proposal, site programme and negotiation before contract award.
What they buy
Most Leeds solar installers tend to spend on tools that reduce quoting friction and site rework: CRM, estimating, proposal generation, survey scheduling, field-service management, stock control and accounting. Firms doing commercial work may also need document-management, compliance tracking, workforce planning, subcontractor management and asset-monitoring software for installed systems. Outside software, common purchases include access equipment, electrical testing gear, vehicles, insurance, training, health and safety support, marketing for local lead generation, and specialist recruitment for electricians, roofers and project managers. Sellers should assume lean administrative teams; products that require lengthy configuration or heavy internal process change may meet resistance unless the operational saving is clear.
Why and how to sell to them
Buying intent often appears when quotation volume starts to exceed admin capacity, when a contractor moves from residential jobs into larger roof programmes, or when public-estate bids expose gaps in documentation and reporting. The 6 Leeds solar installation companies above £5M turnover are more likely to have formal purchasing routines, while newer contractors may still buy through owner-managers and operations leads. Useful outbound angles tend to be specific: fewer missed survey appointments, faster quote turnaround, cleaner handover packs, better cash-flow visibility, easier subcontractor coordination, or aftercare that catches faults before customers complain. Generic sustainability messaging is less persuasive than evidence that a vendor can remove delivery friction.
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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