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Renewable Energy Companies in Hull: 28 Active Firms (2026)
Renewable energy companies in Hull develop, generate and support low-carbon power across the city and surrounding Humber area.
Buying centres in Hull tend to sit around utility procurement, industrial decarbonisation, port and estates management, and public-sector energy teams rather than consumer retail. Suppliers sell into commercial, industrial, utility and local-authority customers, with work ranging from feasibility studies and grid-connection support to operations, maintenance and supply contracts. Engagements are often relationship-led: buyers look for delivery capacity, compliance literacy and site familiarity, not just a tariff or an installation quote. The cohort therefore mixes asset-heavy operators with specialist service teams that sit close to Humber energy infrastructure and industrial demand.
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Hull has 28 renewable energy companies actively trading, making this a compact city-level cohort rather than a broad regional market. Reported employment linked to these firms totals 826 people, so the visible footprint is not only advisory or project origination: there is an operating base of engineers, compliance staff, commercial teams and site-support roles. The revenue distribution also points to a split between a small group of mid-market operators and a longer tail of specialists serving industrial, utility and public-sector buyers around the Humber.
Operators that generate, move or supply energy in Great Britain sit within Ofgem’s licensing framework, with standard and special licence conditions depending on the activity undertaken. For Hull firms, that matters where project development crosses into licensed generation, network activity or supply rather than staying in consultancy or installation services. Legacy support schemes still shape administration: the Renewables Obligation is closed to new generating capacity, but accredited stations remain subject to audit and must submit generation information for Renewables Obligation Certificates. RenewableUK provides the main sector trade-body channel for renewable-electricity policy and export activity.
Hull’s near-term renewable-energy pipeline appears tied less to a wave of new entrants and more to existing operators extending contract scope around generation assets, energy movement and industrial decarbonisation. Early-commercial specialists tend to depend on procurement cycles and permitting confidence, while larger local operators have been better placed to absorb compliance work and longer sales cycles. Consolidation is plausible where service firms need access to asset owners, grid expertise or regulated-market capability, although the cohort’s compact size suggests a measured pattern rather than a broad roll-up.
28
Active firms
2026
5
Above £5M turnover
Hull firms
2
Incorporated since 2022
Hull firms
Key facts
About 17% of the trading cohort reports turnover above £5M (5 of 28 firms) — the rest sits below that revenue band.
7% of the cohort was incorporated since 2022 (2 firms), so a sizeable share is in its first few filing cycles.
Renewable-energy businesses that generate, move or supply energy in Great Britain need an Ofgem licence and must comply with standard and any special licence conditions once granted.
The Renewables Obligation is closed to all new generating capacity, but accredited stations still face audit and compliance checks and must submit generation data for certificates.
UK renewables generated 50.8% of electricity in 2024, up from 46.4% in 2023, with output rising from 135.8 TWh to 144.7 TWh.
Wind supplied 29.5% of UK electricity generation in 2024, split between 17.2% offshore wind and 12.3% onshore wind.
Globally, annual renewable capacity additions are forecast to rise from 666 GW in 2024 to almost 935 GW in 2030, with solar PV and wind making up 95% of additions.
Top Hull Renewable Energy companies
RES GROUP HOLDINGS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops, constructs and operates renewable energy projects including wind, solar and energy storage systems. Provides asset management, operations and maintenance, construction management,…
Serves B2B and institutional customers in clean energy, including landowners, local communities, investors, asset owners, and project developers needing support across wind, solar, storage, hydro and…
Financial Health
HealthyHealthy · -1% CAGR over 2y
Location
Rix Renewables Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides managed maintenance and operational support services for offshore and onshore wind farms, including supply of technicians and inspectors, turbine inspections, balance of plant services, oil…
Serves B2B clients in the offshore and onshore wind energy sector, including wind farm owners, operators, asset managers and OFTO asset holders across the UK and North West Europe.
Financial Health
StrongStrong · Hiring · 15% CAGR over 2y
Location
HDM WORLDWIDE LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, finances and installs commercial solar panel systems under a no‑upfront‑cost model. Supplies electricity generated on-site to businesses through fixed‑price power agreements and sells…
Sells to businesses and commercial property landlords seeking lower-cost electricity and reduced carbon emissions without upfront capital expenditure.
Financial Health
HealthyHealthy · -65% CAGR over 4y
Location
ENABL - WIND UK LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides engineering consulting, equipment and technical services for the wind energy industry, including systems and tooling for wind turbine manufacturing, lifting and installation, automation, and…
Serves B2B customers in the wind and renewable energy sector, including leading renewable companies, wind turbine OEMs/operators, and organisations across the onshore and offshore wind turbine value…
Financial Health
DistressedDistressed · -13% CAGR over 4y
Location
MMS Offshore Renewable Services Limited
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsOperates support vessels providing offshore services for renewable energy and oil and gas sectors, including personnel and equipment transfer, survey operations, fuel and freshwater delivery,…
Serves offshore renewable energy and oil & gas operators, developers and marine contractors involved in offshore construction, survey, diving/ROV and guard operations.
Financial Health
StableStable · 0% CAGR over 1y
Location
RSN Electrical Services Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides electrical and instrumentation engineering services for oil, gas and renewable energy facilities. Delivers engineering and construction, testing and commissioning, project delivery, and…
Serves B2B clients in critical-infrastructure sectors across the UK, including oil and gas, renewables, gas storage, refineries, chemical plants, waste-to-energy, biomass and hydrogen facilities.
Financial Health
StrongStrong · 164% CAGR over 2y
Location
Green Palm Marine Consultancy Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides marine and offshore engineering consultancy for oil, gas and renewable energy projects. Services include transportation and installation engineering, structural analysis, jack‑up rig and…
Serves major operators and end-user clients in the oil, gas and renewable energy sectors, particularly marine, offshore, drilling, subsea, pipeline, wind energy and waste-to-energy markets.
Financial Health
DistressedDistressed
Location
CDS Energy Services Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides fabrication and construction services for energy infrastructure, including high‑pressure process pipework in exotic alloy materials and associated structural steelwork. Delivers turnkey…
Serves B2B clients in wind, oil and gas, nuclear, thermal power, water and hydro, and process industries, including operators and contractors managing safety-critical construction and fabrication…
Financial Health
HealthyHealthy · -2% CAGR over 4y
Location
Struthers Energy & Power Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns, engineers and manufactures waste heat recovery equipment and steam generators for industrial and gas turbine applications. Supplies circular and traditional heat recovery units, packaged…
Serves B2B industrial customers, especially oil and gas majors with onshore and offshore facilities, plus waste-to-energy and renewable power plant operators needing energy recovery equipment and…
Financial Health
HealthyHealthy · -13% CAGR over 2y
Location
N & P Electrical Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides electrical contracting services including electrical design, installation, maintenance and upgrades. Installs solar panel systems, battery storage, EV chargers, and air conditioning or HVAC…
Serves homeowners, employers and commercial organisations, from domestic property owners to businesses across varied industries, with work undertaken across the UK and emphasis on Hull and Humber.
Financial Health
WeakWeak · -9% CAGR over 2y
Location
Pure Renewables Commercial Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDesigns, installs and services renewable energy and heating systems, including solar PV panels, heat pumps, battery storage, underfloor heating, heat recovery systems and EV chargers, for…
Serves B2C homeowners and residential property owners, alongside B2B customers from small commercial premises to large industrial operators with existing and new-build sites.
Financial Health
HealthyHealthy · Hiring · 100% CAGR over 3y
Location
C F Struthers (Hull) Limited
Trajectory
3y · 2022–NowDesigns and manufactures waste heat recovery units, heat recovery steam generators, biomass boilers, pressure vessels, condensers and pressure piping systems. Provides steel fabrication and site…
Serves industrial and energy-sector businesses worldwide, including oil and gas, petrochemical, power generation, renewables and waste-to-energy operators, EPC contractors and manufacturers.
Financial Health
Insufficient historyInsufficient history
Location
C.F.Struthers Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures waste heat recovery units, heat recovery steam generators, boilers, pressure vessels, condensers and heat exchangers. Provides pressure piping systems, steel fabrication and…
Serves industrial operators and engineering contractors in oil and gas, petrochemical, power generation, renewables and waste-to-energy sectors worldwide.
Financial Health
StableStable · -2% CAGR over 2y
Location
Industrial Cogen Solutions Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDesigns and supplies combined heat and power (CHP), cogeneration and trigeneration systems for industrial and commercial facilities. Provides gas engine-based energy generation systems,…
Serves industrial and institutional organisations needing on-site energy generation, including pharmaceutical, food and beverage, chemical, plastics, automotive, aerospace, education, healthcare and…
Financial Health
StableStable · -13% CAGR over 3y
Location
C F Struthers (Holdings) Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures boilers, waste heat recovery units and heat recovery steam generators. Produces pressure vessels, condensers, biomass boilers, heat exchangers and pressure piping, and…
Serves B2B industrial customers worldwide in oil and gas, petrochemical, power generation, renewables and waste-to-energy sectors, including engineering buyers requiring equipment built to…
Financial Health
WeakWeak · -1% CAGR over 2y
Location
A M HARDY ELECTRICAL LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides installation and maintenance of small-scale solar photovoltaic systems, including solar panels, inverters, mounting systems and associated electrical connections for residential and…
Serves UK customers seeking smaller solar installations, likely including homeowners and small businesses.
Financial Health
StableStable · 2% CAGR over 4y
Location
Green Tick Electrical and Renewables Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides electrical installation, inspection, testing and maintenance services for residential, commercial and modular buildings. Also designs and installs renewable energy systems including solar…
Serves UK commercial clients, modular building firms, property developers, retailers, landlords and homeowners needing electrical or renewable installations, plus eligible individuals seeking…
Financial Health
HealthyHealthy · -8% CAGR over 2y
Location
Aircon 365 Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides design, installation, servicing and maintenance of HVAC systems including air conditioning, refrigeration, chillers, ventilation and heating. Also delivers electrical works, carbon reduction…
Serves commercial and public-sector organisations across the UK, including healthcare providers, local authorities, property and facilities managers, offices, telecoms sites and venues.
Financial Health
StableStable · 0% CAGR over 1y
Location
Northern Divers (Engineering) Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides commercial diving and underwater civil engineering services for inland and offshore projects. Activities include marine surveys, maritime salvage, confined space work, riverbank and…
Serves B2B and public-sector clients in marine, civil engineering, utilities, renewables and infrastructure sectors, including organisations managing inland waterways, ports, offshore assets and…
Financial Health
WeakWeak · 0% CAGR over 4y
Location
MS ELECTRICAL SOLUTIONS LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides electrical contracting services including design, installation and commissioning for commercial and modular buildings. Services include electrical testing and inspection, fire and intruder…
Serves businesses across the UK, particularly modular building companies, commercial offices, retail premises and shopfitting projects, with some domestic customers and renewable energy buyers.
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 4y
Location
ANDRITZ FEED & BIOFUEL LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures, sells and services pelleting presses, extrusion equipment and processing machinery for animal feed, aqua feed, pet food and biomass industries, and supplies complete feed and biofuel…
Serves B2B producers and plant operators in animal feed, aquafeed, pet food, biomass pellet and biofuel markets, plus industrial processors in waste pelleting, corn wet milling and bioethanol.
Financial Health
HealthyHealthy · Hiring · 13% CAGR over 2y
Location
Boston Energy Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides technical services and training for the wind energy sector, including offshore and onshore wind turbine installation, commissioning, service and maintenance, pre-assembly, heavy-lift…
Serves businesses in the global onshore and offshore wind energy sector, including wind farm owners, operators, turbine OEMs, project developers, and organisations needing trained wind technicians.
Financial Health
StrongStrong · Profitable, Growing, Hiring · 8% CAGR over 2y
Location
Low Farm Energy
Operates an anaerobic digestion plant that processes agricultural feedstocks and organic waste to produce biogas and generate renewable electricity, supplying power to the grid and producing…
Location
Circular Renewables Limited
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsProvides after‑sales support services for anaerobic digestion and biogas plants, including maintenance and repair, plant optimisation, consultancy, project support, and supply of spare parts for…
Serves B2B operators and owners of anaerobic digestion, biogas and renewable energy plants across England, Scotland and Wales, including farms, biogas businesses and plant managers.
Financial Health
StableStable · -40% CAGR over 1y
Location
ENERGYFORCE LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns, installs and maintains energy infrastructure including solar photovoltaic systems, electric vehicle charging stations, battery storage systems and grid connections. Also develops and…
Serves commercial customers pursuing net-zero energy projects, including service stations, car dealerships, farms, hotels and leisure operators, with some domestic customers also referenced.
Financial Health
HealthyHealthy · Hiring · 25% CAGR over 2y
Location
Triton Power
Operates a combined-cycle gas turbine cogeneration power station that generates electricity for the UK wholesale market. Provides grid stability and synchronous compensation services to the national…
Serves UK wholesale electricity market participants and National Grid Electricity System Operator, targeting energy suppliers, system operators and industrial decarbonisation partners rather than…
Location
GAMCAP MAGNORA DEVELOPMENT COMPANY LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops and invests in powered land and energy infrastructure projects, including renewable energy sites, digital infrastructure and grid support assets. Undertakes in‑house project development,…
Targets investors, developers, originators, landowners and local partners involved in powered land opportunities, including renewables, digital infrastructure and grid support assets, with a global…
Financial Health
DistressedDistressed
Location
Triton Power
Operates a gas‑fired power station generating electricity for the UK wholesale market and providing grid stability services to the National Grid, including synchronous compensation and inertia…
Sells to the UK wholesale electricity market and National Grid Electricity System Operator, serving energy market participants and grid operators requiring generation capacity and system stability…
Location
EBTECH ENERGY SYSTEMS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, supplies and installs heating systems, renewable energy technologies, and mechanical and electrical services for horticultural, agricultural, public sector and commercial facilities,…
Serves B2B and public-sector customers, including schools, universities, commercial and industrial sites, horticultural and agricultural operators, sports facilities and heat-network project owners.
Financial Health
StableStable · Hiring · 6% CAGR over 4y
Location
Boston Renewables Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and installs commercial renewable energy systems including roof- and ground-mounted solar PV arrays, solar carports, battery energy storage and electric vehicle charging infrastructure, and…
Serves businesses across the north of England, including commercial organisations in varied sectors seeking to reduce energy costs, cut carbon emissions, and manage on-site energy generation and EV…
Financial Health
HealthyHealthy · Hiring · 22% CAGR over 2y
Location
EBS RENEWABLES LTD
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProduces electricity from renewable energy sources and supplies electrical engineering equipment. Provides design, supply, installation and commissioning of power systems, including solar panels,…
Serves industrial businesses and project partners needing power supply and energy-efficient engineering equipment, with stated markets in Europe, Africa, the Middle East and CIS countries.
Financial Health
WeakWeak · -68% CAGR over 4y
Location
Manco Pellets Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsSupplies and installs commercial biomass heating systems, including Linka biomass boilers. Provides system design, boiler installation and integration with heat networks, grain dryers and…
Serves UK commercial and agricultural organisations, especially farms, horticultural growers, poultry producers, grain drying operations, glasshouses, district heating schemes and industrial sites.
Financial Health
StableStable
Location
DENMAN TECHNICAL LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides instrumentation, electrical and commissioning support services to power generation and industrial plant projects, supplying engineers, technicians and managers to EPC contractors and…
Serves EPC contractors and power-sector operators in energy-from-waste, biomass, CCPP and water treatment projects, including large power station owners and engineering contractors.
Financial Health
StableStable
Location
East Riding Energy Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsInstalls solar photovoltaic systems for residential, commercial and agricultural buildings. Provides battery storage solutions including Tesla Powerwall, electric vehicle charge point installation,…
Serves homeowners, housebuilders, commercial premises, farms and public-sector property owners in Hull and East Yorkshire, across both new-build and retrofit projects.
Financial Health
StrongStrong · Hiring · 22% CAGR over 2y
Location
Innovate Agri Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides agricultural contracting and civil engineering services for farms and solar energy projects, including solar farm site preparation, construction support and maintenance, muck spreading, and…
Serves agricultural businesses and solar farm EPC contractors across the UK, including farms and organisations developing or maintaining solar farm sites.
Financial Health
StrongStrong · Growing, Hiring · 67% CAGR over 2y
Location
PJS ELECTRICAL AND ALARM SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical installation and maintenance services for domestic and commercial properties. Installs and services intruder and fire alarms, CCTV, access control systems, emergency lighting and…
Serves domestic customers and owners or managers of commercial and industrial properties in Beverley, Hull and surrounding villages, including households, local businesses and property operators.
Financial Health
WeakWeak · -7% CAGR over 4y
Location
Green Bio Fuels (UK) Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops biofuel production technology and equipment, provides biofuels consultancy, and designs and installs biodiesel and other renewable fuel facilities. Conducts research and development into…
Serves B2B customers in renewable fuels, including aviation, marine and road transport sectors, as well as organisations seeking biofuel technology, consultancy or production facilities worldwide.
Financial Health
WeakWeak · 0% CAGR over 4y
Location
Future Drilling Services Ltd
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides geothermal and water borehole drilling services for ground source heat pump systems on domestic, commercial and public sector projects. Also offers borehole installation and environmental…
Serves UK residential property owners, commercial and industrial project teams, and public-sector education clients seeking geothermal or water borehole installations.
Financial Health
HealthyHealthy · 0% CAGR over 3y
Location
PJD Electrical Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides electrical and plumbing services for residential, commercial and agricultural properties, including installations, rewiring, inspections and emergency repairs. Also installs solar and…
Serves homeowners, landlords, commercial organisations and agricultural clients across Hull and East Yorkshire, including off-grid homes, businesses, farms, leisure sites and healthcare premises.
Financial Health
StrongStrong · Growing · 0% CAGR over 2y
Location
Designs and supplies waste heat recovery units and related exhaust and silencing systems for industrial and energy applications. Provides engineering, project management, installation, commissioning…
Serves B2B customers in offshore and onshore oil and gas, power generation and energy infrastructure, including operators, EPC contractors and turbine/power module suppliers.
Location
Brocklesby
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsCollects and recycles used cooking oils, fats and food waste from food producers and commercial kitchens. Processes waste oils, grease and residues into feedstocks for renewable energy, and provides…
Serves businesses generating edible oil, fat and food waste, including food manufacturers, caterers, restaurants and industrial producers needing compliant waste handling and sustainability reporting.
Financial Health
StableStable · 0% CAGR over 1y
Location
River Business Services Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides business telecommunications and energy services including VoIP phone systems, SIP networking and telecoms consultancy, alongside renewable energy solutions such as solar panel installation…
Sells to businesses across sectors seeking telecoms, energy and renewables support, including multi-site firms and property operators. Examples on the site indicate customers such as manufacturers,…
Financial Health
DistressedDistressed
Location
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How Hull Renewable Energy companies work and how to sell to them
What they do
Hull renewable-energy firms usually make money from project development fees, generation or supply contracts, operations and maintenance work, and specialist advisory services around connection, compliance and site delivery. Asset owners may have revenue linked to output, availability or multi-year supply agreements, while service providers charge fixed-fee, day-rate or retainer models. The commercial shape is rarely pure software; most offers combine engineering, field operations, documentation and commercial risk management. A smaller set of 5 operators with turnover above £5M can usually carry longer mobilisation periods than consultancy-led teams.
Who they sell to
Typical customers are utilities, industrial energy users, port and estate owners, local authorities and other public-sector bodies with a duty to buy low-carbon power or manage energy assets. Decisions usually involve several functions: procurement controls the process, finance tests payback and credit risk, engineering or operations assesses delivery risk, and sustainability teams shape requirements where carbon reporting is part of the brief. Smaller service contracts can be won through direct relationships, but asset work and public-sector supply often move through tender, framework or RFP processes, with sales cycles measured in months rather than weeks.
What they buy
Most Hull renewable-energy firms tend to spend on tools and services that keep assets available, projects auditable and bids moving. Common software needs include CRM for tender pipelines, asset management, field-service scheduling, billing, document control, compliance workflow, metering analytics and cybersecurity. Operators also buy legal support, planning advice, grid-connection consultancy, accounting, insurance, recruitment and safety training. Infrastructure spend can cover cloud hosting, telemetry, monitoring equipment, vehicles, test equipment and workshop or yard capacity. Sellers with evidence of work around regulated or safety-critical environments usually have an easier conversation than generalist suppliers.
Why and how to sell to them
Buying triggers often appear when a generator mobilises a new asset, a service firm wins a larger maintenance contract, an operator prepares for Ofgem evidence requests, or a project moves from feasibility into delivery. With only 2 firms incorporated since 2022, prospecting is more likely to work through contract expansion, leadership hires and compliance pressure than through new-company alerts. Outbound messages should show familiarity with the Humber operating context, name the operational bottleneck being solved, and make the business case in avoided downtime, faster reporting, cleaner audit trails or lower bid 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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