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Oil and Gas Companies in Leeds: 70 Active Firms (2026)
Oil and gas companies in Leeds produce, distribute or support hydrocarbon energy operations across the surrounding metropolitan area.
Buying activity tends to sit with operations, procurement and commercial teams rather than a single technology budget. Leeds-based suppliers in this category usually sell into industrial sites, infrastructure operators and energy-sector intermediaries, with work split between field services, engineering support, equipment supply, distribution, trading and specialist advice. Engagements are typically contractual and risk-screened: asset-light firms may handle brokerage, commercial support or niche supply, while operational businesses need crews, kit, insurance and site-access credentials. The practical buying trigger is usually continuity of supply, plant reliability, regulatory readiness or cost control across the wider West Yorkshire and UK energy chain.
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Leeds has 70 actively trading oil and gas companies, making the local base relatively small but varied across service, supply and commercial roles. Reported employment totals 1,245 people, which points to a cohort with some operating depth rather than a purely desk-based broker population. Only 10 firms sit above £5M in revenue, so revenue concentration is likely to matter when comparing suppliers: a short tail of larger contractors and distributors can shape the market view, while many firms remain closer to specialist, project-led or owner-managed activity.
Market structure here is likely to be shaped by customer procurement and operational assurance as much as by formal sector boundaries. Buyers in industrial, infrastructure and energy settings tend to require proof of insurance, safety procedures, delivery capacity and subcontractor control before work is awarded. For suppliers handling fuel, equipment or site services, commercial risk can sit in logistics, counterparty exposure, environmental obligations and downtime penalties. That favours firms able to document process and delivery history, but it does not make the local market uniform; trading, engineering and field-service businesses face different checks before they win work.
The Leeds cohort appears likely to evolve through gradual repositioning rather than a single break in direction. Service and engineering suppliers tend to have the most room to adapt, because their skills can be sold into adjacent industrial energy work without abandoning hydrocarbon customers. Distribution and trading firms look more exposed to margin pressure, credit scrutiny and customer concentration. Newer entrants may stay lean for longer, while established operators with site capability and repeat contracts appear better placed to absorb compliance work, insurance costs and slower buying cycles.
70
Active firms
2026
10
Revenue above £5M
9
Recent incorporations
Since 2022
Key facts
About 14% of the trading cohort reports turnover above £5M (10 of 70 firms) — the rest sits below that revenue band.
12% of the cohort was incorporated since 2022 (9 firms), so a sizeable share is in its first few filing cycles.
Leeds-area oil and gas businesses sit across production, distribution and operating support rather than a single activity line.
The local market appears more supply-chain oriented than consumer-facing, with activity tied to hydrocarbon operations around the wider metropolitan area.
Screening this segment tends to require attention to operating model, since fuel supply, service work and infrastructure support have different commercial profiles.
Top Leeds oil and gas companies
SALAMANDER SOLUTIONS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops electric heater cable technology for the oil and gas industry. Supplies heating systems for onshore and subsea flowlines to maintain temperature, prevent blockages, and improve production,…
Serves B2B oil and gas operators with onshore production assets, offshore/subsea fields and flowline infrastructure, including teams focused on production recovery, flow assurance and field life…
Financial Health
WeakWeak · -67% CAGR over 4y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures custom industrial equipment for energy and process industries, including pressure vessels, heat exchangers, storage tanks, skid packages, line heaters, flare systems and…
Serves B2B customers in energy, oil and natural gas, process, and manufacturing industries, including engineering firms and producers requiring custom industrial equipment to technical and field…
Financial Health
WeakWeak · -2% CAGR over 4y
Location
Ithaca Energy Developments
Provides engineering, procurement, and construction services for the energy industry. Designs, builds, and operates onshore and offshore oil and gas production facilities, and delivers asset support,…
Serves energy-sector businesses, including oil and gas operators and companies developing onshore and offshore energy infrastructure, across international markets.
Location
Formulates, blends and distributes fuel and lubricant additives, base oils and speciality chemicals. Provides procurement, consolidation, warehousing, toll blending, contract packing and…
Serves B2B customers in the lubricant, fuels and speciality chemicals markets, including oil multinationals, technology leaders, regional blenders, and automotive or industrial product formulators.
Location
Formulates, blends and distributes fuel and lubricant additives, base oils and specialty chemicals. Provides procurement, consolidation, warehousing, toll blending, contract packing and international…
Serves B2B customers in the lubricants, fuels and speciality chemicals markets, including oil multinationals, technology leaders, regional blenders and automotive or industrial product formulators.
Location
Cobo Tankers & Services Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsManufactures tanker vehicles and tank containers, specialising in aluminium tanks for transporting hydrocarbons and other liquids. Provides engineering and design, production of dish ends and…
Serves commercial tanker operators, fuel and hydrocarbon transport companies, and manufacturers of large equipment worldwide, including owners of tanks from its own and other manufacturers.
Financial Health
StableStable · 0% CAGR over 5y
Location
Provides formulation, blending and distribution of fuel and lubricant additives, base oils and speciality chemicals. Also offers chemical logistics, warehousing, toll blending, contract packing and…
Serves B2B customers in the lubricant, fuels and speciality chemicals markets, including worldwide technology leaders, oil multinationals, regional blenders, and automotive or industrial product…
Location
Hydraulic Analysis Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides hydraulic engineering consultancy for pipeline and fluid transport systems, including surge and transient analysis, hydraulic modelling, digital twin and real-time simulation tools, testing…
Serves B2B clients in water, wastewater, energy, oil, gas and petrochemical sectors, including utilities, pipeline operators, EPC project teams and industrial facilities with complex pipeline and…
Financial Health
StableStable · Hiring · 6% CAGR over 2y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and engineers metering and gauging systems for fuel delivery on road tankers, including electronic metering units, in‑cab computers, pumps and ancillary equipment. Supplies components and…
Serves B2B fuel distributors, fuel oil operatives and road tanker fleet operators, including drivers and operations teams delivering fuels such as AdBlue, HVO, LPG and lube oil across the UK and…
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 2y
Location
LEEDS BUILDING SERVICES LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides engineering fabrication services including manufacture and repair of storage tanks, pipework and structural steelwork. Also produces modular units and undertakes refurbishment and…
Serves B2B industrial and infrastructure customers, including oil storage operators, shipbuilders and fire defence/public sector clients requiring engineering fabrication and steelwork support.
Financial Health
StableStable · -90% CAGR over 2y
Location
Vickers Oils
Manufactures and supplies lubricants and greases for marine, textile, food processing, and industrial applications. Products include hydraulic fluids, gear oils, compressor oils, wire rope…
Serves B2B customers in marine, textile, food-grade and industrial sectors, including vessel operators, OEMs, textile manufacturers, food processors, plant operators and distributors.
Location
JCE Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures ATEX and IECEx certified industrial control systems, explosion‑protected electrical equipment, and off‑grid renewable power systems. Provides engineering, project delivery,…
Sells to industrial and marine operators, offshore energy companies, OEMs and engineering contractors working in hazardous-area environments, including oil and gas and renewable energy sites…
Financial Health
DistressedDistressed · 0% CAGR over 4y
Location
Guided Ultrasonics Ltd
Develops and supplies guided wave ultrasonic testing systems for pipeline inspection and monitoring. Provides equipment such as Wavemaker scanners and gPIMS monitoring systems, along with training,…
Serves B2B pipeline asset owners and inspection teams, including refineries, offshore operators, midstream pipeline companies and NDT professionals responsible for pipework integrity.
Location
Simulation Software Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDevelops pipeline simulation and management software used to model and analyse hydraulic behaviour in water, oil, gas, district heating, and power networks. Provides tools for monitoring, leak…
Serves B2B pipeline owners and operators, plus engineering, operations and training teams, in the water, oil, gas, petrochemical, district heating and power industries worldwide.
Financial Health
HealthyHealthy · Hiring · 5% CAGR over 2y
Location
Tate Medical Engineering Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies and distributes domestic, agricultural and commercial fuels including heating oil, diesel and HVO. Provides bulk fuel delivery, lubricants and additives, fuel tanks, AdBlue, and related…
Sells to households needing heating oil, plus B2B customers in agriculture, commercial and construction sectors. Serves rural homeowners, farms, fuel buyers and businesses needing diesel, lubricants,…
Financial Health
StableStable · -68% CAGR over 4y
Location
Provides engineering, procurement, construction and maintenance services for offshore and onshore energy infrastructure, including oil and gas facilities, subsea systems, offshore wind installations…
Serves large energy companies and asset operators in oil and gas, offshore and onshore energy infrastructure, hydropower and renewables, including major global operators and developers.
Location
CIE Solutions Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides engineering consultancy and project delivery services, including engineering design, project management and EPCM support. Offers electrical, control and instrumentation, process and piping…
Serves industrial businesses needing engineering project support, particularly upper-tier COMAH sites and operators in chemicals, petrochemicals, oil and gas, biotechnology, carbon capture, nuclear…
Financial Health
StrongStrong · Growing, Hiring · 29% CAGR over 2y
Location
Vickers Oils
Manufactures and supplies lubricants and greases for marine, textile, food processing and industrial applications, including environmentally acceptable lubricants. Provides products such as hydraulic…
Serves B2B customers in the marine, textile, food processing and industrial sectors, including vessel operators, textile mills, machinery OEMs and distributors.
Location
M & N Commodities Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsTrades physical commodities including aluminium, copper, nickel, zinc, lead and ferroalloys, as well as energy products such as oil, jet fuel, gas oil, petroleum coke and coal, sourcing from global…
Serves B2B buyers of metals, minerals and energy commodities, including industrial manufacturers, fuel users and commodity trading counterparties sourcing aluminium, copper, oil, jet fuel, coal and…
Financial Health
HealthyHealthy · -3% CAGR over 4y
Location
Trajectory
1y · 2025–NowDevelops software providing digital twin visualisation and collaboration tools for industrial assets. Platform integrates engineering and operational data to model facilities such as offshore…
Serves B2B customers building or operating heavy industrial assets, including EPC teams, asset owners, operators and suppliers in offshore energy, refineries, wind farms, FPSOs, drilling rigs and…
Financial Health
Insufficient historyInsufficient history
Location
LANGLEY VALVES LIMITED
Trajectory
5y · 2021–NowDesigns, manufactures, stocks and modifies industrial valves including gate, globe, check, ball, cryogenic and bellows‑sealed types in stainless steel, duplex, aluminium bronze and nickel alloys.…
Serves B2B engineering, procurement and maintenance teams in oil, hydrocarbon processing, chemical, petrochemical and nuclear industries worldwide, from single-site requirements to large-volume…
Financial Health
Insufficient historyInsufficient history
Location
Oilgear
Manufactures hydraulic piston pumps, industrial valves, and rotary actuators for applications in industrial machinery, oil and gas, mobile equipment, aerospace, defense, and energy sectors. Also…
Serves B2B and public-sector buyers in industrial manufacturing, oil and gas, mobile equipment, aerospace and defense, energy, automotive testing, mining, forestry, agriculture, construction and…
Location
North Chemicals Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
WeakWeak · Hiring · 26% CAGR over 3y
Location
Provides engineering, maintenance, modification and operations services for offshore and onshore energy infrastructure. Supports oil and gas production facilities and energy projects with inspection,…
Serves large energy companies and infrastructure operators, including oil and gas producers, offshore asset owners, renewable energy developers and utilities with complex onshore and offshore…
Location
Oilgear Towler Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures hydraulic piston pumps, valves and rotary actuators for industrial, mobile, oil and gas, energy and defence applications. Also provides electrical controls, subsea equipment, test…
Serves B2B customers in heavy industrial and mobile equipment markets, including steel, oil and gas, subsea/offshore, construction, agriculture, mining, municipalities, aerospace, defense, energy and…
Financial Health
StableStable · Hiring · 23% CAGR over 2y
Location
Explores for, develops and produces oil and natural gas from offshore fields. Operates and manages production assets and infrastructure, working with partners to extract hydrocarbons and manage…
Serves wholesale energy market participants and B2B stakeholders, including joint-venture partners, suppliers and investors focused on UK Continental Shelf oil and gas assets.
Location
Explores for, develops and produces oil and natural gas from offshore fields. Operates and manages hydrocarbon production assets and infrastructure, and undertakes related activities including field…
Serves B2B energy-sector customers and stakeholders in the UK, including oil and gas offtakers, joint-venture partners, investors and supply-chain partners linked to North Sea assets.
Location
Explores for, develops and produces oil and natural gas from offshore fields. Operates and manages energy production assets and infrastructure, oversees reserves development and production…
Serves B2B customers and stakeholders in the UK energy sector, including oil and gas partners, commodity buyers, suppliers, and investors focused on North Sea production.
Location
Operates and develops offshore oil and gas fields, producing crude oil and natural gas. Manages exploration and production assets, infrastructure and reserves development, and undertakes…
Serves B2B customers in the UK energy sector, alongside investors and industry partners focused on North Sea oil and gas assets.
Location
J. W. HINCHLIFFE (TANKS) LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides fuel and oil tank services including installation, removal, cleaning and decommissioning of commercial and domestic tanks. Also conducts tank inspections, integrity testing, refurbishment,…
Serves businesses and industrial sites across the UK that operate fuel or oil tanks, including forecourts and facilities managers, alongside domestic homeowners with residential oil tanks.
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 4y
Location
RN HEAT & POWER LIMITED
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProvides maintenance and technical services for natural gas and biogas infrastructure, including LNG and CNG fuelling stations, biomethane plants, CHP units, and gas compressors. Supplies servicing,…
Serves UK businesses in natural gas and biogas, including LNG/CNG station operators, biomethane plant owners, CHP users and organisations running CNG compressors or gas fuelling infrastructure.
Financial Health
HealthyHealthy · Hiring · 14% CAGR over 1y
Location
Innergy LPG Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsSupplies bottled LPG and gas products for domestic and commercial use, including propane, butane, forklift truck gas, beer dispense gas, and industrial and welding gases. Also sells related equipment…
Serves both B2B and B2C customers across England, including pubs, restaurants, hotels, mobile caterers, holiday parks, manufacturers, farms, forklift operators, welding users, park homes, and…
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 5y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops cloud-based software for subsea asset integrity management. The platform integrates inspection and operational data to plan, track and analyse the condition of subsea assets such as…
Serves B2B subsea asset operators and integrity teams managing offshore infrastructure, including pipelines, hulls, structures, power cables and telecoms assets.
Financial Health
WeakWeak · -27% CAGR over 2y
Location
SEISMIC IMAGE PROCESSING LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides seismic data processing and depth imaging services for subsurface exploration, including wave‑equation and reverse time migration, velocity modelling, and elastic inversion. Produces angle…
Serves oil and gas exploration and production companies, particularly geoscience, reservoir and prospect evaluation teams using seismic data for subsurface prospect and reservoir decisions.
Financial Health
WeakWeak · -5% CAGR over 4y
Location
Moisture Control and Measurement (UK) Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures trace moisture analysers and hygrometer systems for monitoring moisture in industrial gases and processes. Supplies online and portable analysers, hazardous‑area instruments,…
Serves industrial and energy-sector organisations, including natural gas and LNG operators, air separation and packaged gas producers, hydrogen, semiconductor, healthcare, food and beverage,…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
Provides hazardous and difficult waste management services, including treatment, transfer and disposal of industrial, oil and gas, nuclear and radioactive wastes. Also offers dredging treatment,…
Serves UK businesses and organisations in renewable energy, infrastructure and construction, nuclear/radioactive, process and manufacturing, oil and gas, utilities, cement and defence sectors…
Location
Getech
Provides geoscience data, software and consultancy for energy and mineral exploration. Uses gravity and magnetic datasets, geospatial analysis, GIS and AI‑driven modelling to identify subsurface…
Sells primarily to B2B energy and natural resources organisations, including petroleum, critical minerals, geothermal, natural hydrogen and carbon capture operators, plus geoscience and exploration…
Location
VICKERS (LEEDS) LIMITED
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsManufactures and supplies lubricants and greases for marine, textile, food processing, and industrial applications. Products include hydraulic fluids, gear oils, compressor oils, sterntube…
Serves B2B customers in marine, textile, food-grade manufacturing and industrial sectors, including vessel operators, textile mills, food processors, OEMs and distributors worldwide.
Financial Health
StableStable
Location
Bayford Group
Operates a group of businesses focused on energy supply and fuel distribution, EV charging infrastructure, property investment and development, hospitality venues and estates, and technology…
Serves a mix of B2B and consumer markets through its group companies, including energy customers, property occupiers and investors, and hospitality customers such as wedding, private event and…
Financial Health
Insufficient historyInsufficient history
Location
Brad-Chem Holdings Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsManufactures and supplies specialty chemical additives including lubricant additive packages, corrosion inhibitors, copper passivators, solid lubricants and dispersions. Distributes molybdenum…
Sells to businesses in lubricants, industrial cleaning, deicing and water treatment, including lubricant blenders, manufacturers and distributors. Serves sectors such as aerospace, automotive,…
Financial Health
HealthyHealthy
Location
SCARBOROUGH ENERGY LIMITED
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
StableStable · 0% CAGR over 1y
Location
MEADOWBANK GREEN ENERGY LTD
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
StableStable
Location
CHAPPELL (TRANSPORT & DISTRIBUTION) LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsSupplies and delivers fuels and related products including kerosene heating oil, gas oil (red diesel), road diesel, lubricants, additives and AdBlue to domestic, commercial, industrial and…
Serves domestic households and commercial, industrial and agricultural customers across Ossett and Yorkshire, including Wakefield, Leeds, Bradford, Huddersfield, Barnsley, Rotherham, Doncaster,…
Financial Health
StableStable · -61% CAGR over 5y
Location
ALCO VALVES GROUP LIMITED
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsDesigns, manufactures and supplies instrumentation and process valves, including ball, needle, manifold and double block and bleed valves, as well as subsea and hydrogen valves, with related…
Sells B2B to companies in oil, natural gas, petrochemical, hydrogen and subsea sectors, including industrial operators and engineering buyers needing high-integrity valve products and accessories.
Financial Health
WeakWeak · -80% CAGR over 5y
Location
SABRE INSTRUMENT VALVES LIMITED
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures instrumentation valves and related components, including ball, needle, manifold, double block and bleed, and check valves, as well as valve enclosures and mounting systems…
Sells to B2B engineering, procurement and operations teams in oil, natural gas, petrochemical, hydrogen and subsea sectors requiring high-integrity valve and instrumentation supply.
Financial Health
StrongStrong · -94% CAGR over 2y
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsSupplies heating oil, diesel fuels (red, white and renewable HVO), AdBlue and industrial lubricants to homes, farms and businesses. Provides fuel delivery, tank installation and removal, fuel…
Sells to households, farms and businesses needing fuel supply, including factories and other commercial users. Targets home heating customers, agricultural operators and business fuel buyers,…
Financial Health
HealthyHealthy
Location
Oxalis Logistics
Provides transport and distribution of bulk fuels, gases and petroleum products. Operates tanker fleets delivering retail, commercial and aviation fuel, bitumen and biofuels, and offers into‑plane…
Serves large B2B clients in the oil, gas, chemicals, energy, industrial and aviation fuel sectors, including companies with UK and European bulk fuel, gas and petroleum-product supply chains.
Location
RMA PIPELINE EQUIPMENT LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsSupplies pipeline equipment for gas transport and distribution, including ball valves, adapters, couplers, pig traps, insulation joints, pressure regulators, and gas measurement systems such as…
Serves gas transmission and distribution network operators, utilities, pipeline contractors and energy infrastructure companies, including household connection, metering/control and hydrogen/CO2…
Financial Health
DistressedDistressed
Location
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How Leeds oil and gas companies work and how to sell to them
What they do
Leeds oil and gas suppliers usually earn revenue through contractual service work, distribution margins, equipment sales, brokerage fees or specialist advisory retainers. The commercial model is practical rather than purely technical: some firms sell field engineering, maintenance support or site labour; others move parts, fuel-related inputs or commercial information through the supply chain. Pricing tends to follow day rates, call-off schedules, quoted project fees, mark-ups on traded goods or retained support agreements. Gross margin is often shaped by utilisation, logistics, subcontractor cost, credit exposure and the buyer's tolerance for downtime.
Who they sell to
Most sell to operations-led buyers at industrial plants, infrastructure operators, utilities-adjacent contractors, energy intermediaries and larger distributors. The first conversation may sit with an operations manager or commercial lead, but procurement, finance and health-and-safety teams tend to enter before award. Smaller purchases can be handled through direct relationships or repeat ordering, while larger work is often tendered through framework agreements, approved-supplier lists or customer RFPs. Sales cycles vary with risk: urgent replacement and continuity work can move within a short cycle, while new service scopes usually require site checks, insurance review and contract negotiation.
What they buy
Most oil and gas firms in this segment tend to spend on systems and services that reduce delivery risk or administrative drag. Common categories include field-service scheduling, asset maintenance, document control, tender management, CRM, quoting, billing, credit control, stock management and fleet coordination. Security, backup, cloud hosting and basic analytics are easier to position when linked to customer assurance or continuity of operations. Outside software, the buyer base often uses specialist accounting, insurance broking, contract review, recruitment, safety training, payroll, vehicle support, warehousing and marketing for tender visibility rather than broad brand-building.
Why and how to sell to them
Oil and gas suppliers tend to evaluate vendors when operating risk becomes commercially visible: a missed delivery, a failed tender, a safety review, an insurance renewal or a customer asking for better reporting. Margin pressure also creates openings for tools that shorten quote cycles, improve job costing or reduce manual re-keying between operations and finance. The 9 firms incorporated since 2022 may be building controls from scratch, while older contractors are more likely to replace patched-together spreadsheets and local processes. Outbound tends to work better when it names the specific friction — tender evidence, subcontractor oversight, credit risk, mobilisation time or proof of compliance — rather than pitching generic efficiency.
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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