Advanced Manufacturing Companies in Leeds: 2,277 Active Firms (2026)
Advanced manufacturing companies in Leeds build high-value products and production technologies across materials, machinery, vehicles and regulated equipment.
Buying centres tend to sit with engineering, production, quality and supply-chain teams rather than a software-style budget owner. Buyers are usually industrial manufacturers, tiered suppliers, infrastructure operators or public-sector procurement teams that need validated components, production equipment or enabling technologies. Engagements are specification-led: technical trials, compliance evidence, service support and supply assurance matter as much as price. Leeds-area firms in this space are therefore closer to capital-equipment and regulated-product suppliers than light manufacturing subcontractors, with sales cycles shaped by design approval, qualification and repeat production.
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Leeds has 2,277 actively trading advanced-manufacturing companies, a sizeable local base without implying that all are large production sites. Reported employment totals 2,787 people, pointing to a visible workforce tied to production, engineering, quality and supply-chain functions rather than purely administrative shells. Turnover distribution is uneven: 222 are above £5M in turnover, while incorporations since 2022 add a newer, lower-scale layer to the market.
A sector-wide licence does not govern this market. Government industrial strategy treats advanced materials, aerospace, agri-tech, automotive, batteries and space-related production as frontier manufacturing areas, while product compliance is handled through use-case rules. GOV.UK guidance puts UKCA and CE marking at the centre for machinery, electrical equipment, electromagnetic compatibility, lifts, measuring instruments, equipment used in potentially explosive atmospheres and medical devices. Public-sector innovation and adoption networks matter commercially, but they are not licensing bodies.
Specification-heavy sales appear likely to keep this market less fluid than software or consumer hardware. Newer entrants tend to face long qualification cycles, while established manufacturers have to absorb compliance work alongside production and supply-chain risk. The thinner scale-up layer suggests that growth may come from partnerships, contract wins and selective acquisitions rather than a broad wave of standalone challengers. Leeds should remain exposed to national industrial policy and capital-spending cycles, because buyers often delay equipment and process upgrades when budgets tighten.
What’s in the file
One row per company, 50+ columns — everything below plus each company’s verified directors, from Companies House filings.
Company data
Verified directors — included
2,277
Active firms
2026
222
Over £5M turnover
Higher-revenue firms
376
Recent incorporations
Incorporated since 2022
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Key facts
About 9% of the trading cohort reports turnover above £5M (222 of 2,277 firms) — the rest sits below that revenue band.
16% of the cohort was incorporated since 2022 (376 firms), so a sizeable share is in its first few filing cycles.
The UK sector plan defines six frontier industries: advanced materials, aerospace, agri-tech, automotive, batteries and space.
GOV.UK guidance sets UKCA and CE marking requirements for machinery, electrical equipment, electromagnetic compatibility, equipment for potentially explosive atmospheres, lifts, measuring instruments and medical devices.
UK advanced manufacturing has over 760,000 jobs and £82 billion in annual GVA, alongside £12.9 billion of business R&D in 2023, equal to 25.7% of the UK total.
ONS reports UK manufacturers’ product sales of £452.2 billion in 2024, down £14.5 billion, or negative 3.1%, from £466.7 billion in 2023.
The UK’s share of global manufacturing value added fell from 3.1% in 2000 to 1.9% in 2022, while its manufacturing export share fell from 3.7% in 2000 to 1.5% in 2020.
Top Leeds Advanced Manufacturing companies
Financial sub-scores
Computed from 5 filingsDesigns and manufactures precision toolholding and workholding equipment for CNC machining, including mandrels, collets, boring bar holders, rotating centres and fixturing systems. Also provides…
Sells to B2B manufacturers and engineering teams needing toolholding, workholding and supply chain support, including buyers in aerospace, automotive, defence, oil and gas, medical, food technology,…
Financial Health
HealthyHealthy · -5% CAGR over 4y
Location
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Computed from 5 filingsDesigns and manufactures electronic control systems and circuit boards for industrial automation. Produces bespoke control panels and provides installation, commissioning, maintenance and repair…
Serves industrial businesses in process industries worldwide, including waste extraction, food and drink, canning, aerospace, water, printing, recycling and automotive, especially operators of safe…
Financial Health
StrongStrong · Growing · 2% CAGR over 4y
Location
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Computed from 3 filingsProvides bespoke extrusion and melt‑spinning equipment for producing technical textile fibres, yarns and nonwovens, including absorbable and resorbable polymer materials. Supplies laboratory, pilot…
Serves B2B technical textile, polymer fibre and medical device manufacturers, plus R&D teams developing high-value yarns, fibres, nonwovens and absorbable biomedical materials at laboratory, pilot…
Financial Health
StrongStrong · Growing, Hiring · 10% CAGR over 2y
Location
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Computed from 5 filingsManufactures material testing machines and equipment and provides servicing, maintenance and calibration for testing systems used to measure strength and performance of materials in laboratory and…
Financial Health
DistressedDistressed · -81% CAGR over 4y
Location
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Computed from 4 filingsManufactures carbon, graphite and polymer materials and components for electrical and mechanical applications. Products include carbon brushes, brush holders, mechanical seals, graphite bearings,…
Serves B2B engineering and industrial customers in oil and gas, manufacturing, pumps, electric motors, water treatment, energy, transport, aerospace, rail, medical and defence sectors.
Financial Health
StableStable · -8% CAGR over 3y
Location
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Computed from 5 filingsProvides CNC precision engineering and subcontract machining services, offering design input, prototyping and high‑volume production of finished components. Supplies machined parts for sectors…
Serves B2B OEMs and manufacturers needing precision-engineered components, particularly in defence, space, telecommunications, audio, autosport and safety-related railway products.
Financial Health
HealthyHealthy · Hiring · 17% CAGR over 4y
Location
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Computed from 5 filingsProvides metal finishing services for aerospace and power generation components, including chemical processing, grain and macrographic etching, chemical milling, nickel plating, and precision hand…
Serves B2B customers in the aerospace and power generation industries, including buyers needing metal finishing support for high-volume production, rapid-response work, one-off jobs, short runs, and…
Financial Health
WeakWeak · -4% CAGR over 4y
Location
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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
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Computed from 4 filingsProvides design, manufacture and supply of fixed gas detection and gas sampling systems, including detectors, sensors, alarms and monitoring equipment. Also offers installation support, maintenance…
Sells to businesses and industrial operators needing gas detection and monitoring, including safety, facilities and engineering teams managing ATEX, non-ATEX, refrigerant or hazardous gas…
Financial Health
HealthyHealthy · -1% CAGR over 3y
Location
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Computed from 5 filingsDesigns and manufactures urology and infection‑prevention medical products, including catheter drainage systems, leg bags, fixation devices, intermittent self‑catheterisation products, and sterile…
Serves NHS hospitals, urology healthcare providers, medical distributors and patients needing catheter, drainage and healthcare lubrication supplies in the UK and international healthcare markets.
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 5y
Location
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Computed from 5 filingsProvides aircraft maintenance and repair services under UK CAA Part 145 approval. Manufactures aircraft decals and components under Part 21G, and offers line station support, storage, refurbishment…
Serves B2B aviation customers, including airlines, aircraft operators and industry partners managing commercial aircraft fleets under UK CAA Part 145 and Part 21G requirements.
Financial Health
StrongStrong · Hiring · 14% CAGR over 4y
Location
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Computed from 5 filingsDesigns and manufactures specialist road tankers for the waste and environmental management sectors, including vacuum tankers, combination units and ADR tankers. Also provides tanker servicing,…
Sells to waste management and environmental services businesses needing vacuum, combination and ADR tankers for hazardous-material and related waste applications.
Financial Health
StableStable · Hiring · 38% CAGR over 4y
Location
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Computed from 5 filingsProvides pipework prefabrication, installation, and off‑site manufactured packaged plant rooms, modules and skids for construction and engineering projects. Also offers 3D laser scanning, design…
Serves B2B construction and engineering buyers, including main contractors, M&E contractors and project teams delivering commercial, industrial and infrastructure schemes.
Financial Health
HealthyHealthy · -14% CAGR over 4y
Location
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Computed from 3 filingsManufactures and supplies LED lightbars, beacons, warning lights, and siren systems for vehicles. Provides lighting and audible warning equipment designed for emergency, safety, and specialist…
Sells to public-sector emergency services, safety-service operators, fleet managers and specialist vehicle installers worldwide.
Financial Health
StableStable · -90% CAGR over 2y
Location
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Computed from 4 filingsDesigns and manufactures LED architectural and commercial lighting systems, including linear, accent, flexible, in‑ground and underwater luminaires. Provides bespoke lighting solutions and smart…
Serves lighting designers, architects and specifiers working on commercial and architectural developments, including hotels, offices, restaurants, transport hubs, cultural venues, universities and…
Financial Health
StableStable · -4% CAGR over 3y
Location
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Computed from 5 filingsDesigns and manufactures machined and fabricated plastic and metal components for industrial applications. Provides subcontract machining, bespoke project work, additive manufacturing, on‑site…
Serves B2B engineering, production and maintenance teams in manufacturing industries, including food and drink, personal care and pharmaceuticals.
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 4y
Location
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Computed from 5 filingsManufactures contamination control products for cleanroom and controlled environments, including wipes, mopping systems, disinfectants, cleaning solutions, and swabs. Supplies products used in…
Serves B2B customers in controlled manufacturing environments, including life sciences, biotechnology, pharmaceutical and medical device manufacturers, aseptic services, pharmacy operations,…
Financial Health
DistressedDistressed · -65% CAGR over 4y
Location
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Computed from 3 filingsDesigns and manufactures high‑speed industrial doors and bespoke door systems for sectors including food processing, logistics, pharmaceuticals and manufacturing. Provides installation, maintenance,…
Serves B2B industrial and commercial customers in recycling, food production and packaging, manufacturing, chemical/pharmaceutical, logistics, warehousing, temperature-controlled storage,…
Financial Health
HealthyHealthy · Profitable · 3% CAGR over 2y
Location
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Computed from 5 filingsManufactures custom plastic components and products using processes including injection moulding, CNC machining, laser cutting, milling, routing, vacuum forming and 3D printing, and provides plastic…
Serves industrial and commercial buyers sourcing custom plastic components, including organisations needing fabricated, moulded or CNC-machined parts.
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 4y
Location
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Computed from 5 filingsManufactures precision turned and milled components using CNC machining, including fixed head, sliding head and milling processes. Produces metal and plastic parts from materials such as steel,…
Serves B2B customers in automotive, agriculture, construction, oil and gas, boiler, lighting and marine industries, including manufacturers needing specialist components for demanding environments…
Financial Health
HealthyHealthy · -5% CAGR over 5y
Location
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Computed from 3 filingsProvides metal engineering services including fibre laser cutting, fabrication and welding, and supplies bespoke aluminium extrusions, commercial vehicle body kits, and 3.5‑tonne tipper and dropside…
Serves B2B customers nationwide in commercial vehicle bodybuilding, road transport, manufacturing and fit-out sectors, including sign and panel makers, furniture and window-frame producers, access…
Financial Health
StrongStrong · Growing · 2% CAGR over 2y
Location
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Computed from 4 filingsDesigns and manufactures LED lighting and luminaires for commercial, industrial and marine applications, including office, retail, warehouse and vandal‑resistant lighting. Provides bespoke lighting…
Serves B2B and public-sector buyers needing commercial, industrial, marine and vandal-resistant lighting, including offices, retailers, factories, warehouses, prisons, schools, public facilities,…
Financial Health
HealthyHealthy · -68% CAGR over 4y
Location
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Computed from 5 filingsProvides hydraulic engineering services including repair and servicing of hydraulic equipment, supply and manufacture of hydraulic parts, and hydraulic system design. Distributes and services pumps,…
Serves UK-wide business clients and industrial operators that use hydraulic machinery, including maintenance teams, equipment users and organisations needing replacement parts, repairs, system…
Financial Health
StableStable · -2% CAGR over 4y
Location
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Computed from 5 filingsDesigns, manufactures and supplies bespoke aluminium extrusions, profiles and components. Provides fabrication, CNC machining, profile punching and assembly services, producing aluminium parts and…
Serves B2B customers in construction, engineering, manufacturing, retail and transportation, including buyers sourcing aluminium profiles and components for lighting, medical equipment, office…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
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Computed from 5 filingsProvides subcontract precision engineering services including CNC machining, milling and turning to produce high‑precision metal components. Also manufactures laboratory metalware such as clamps,…
Serves B2B customers in fire suppression, firefighting, pharmaceutical, life science, rail refurbishment and telecoms sectors, plus organisations buying laboratory metalware and apparatus.
Financial Health
StableStable · -68% CAGR over 4y
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Computed from 5 filingsSupplies and services industrial actuation systems and valves, including electric, pneumatic and hydraulic actuators and ball, butterfly, gate and check valves. Provides installation, maintenance and…
Serves B2B industrial operators across the UK, including manufacturing, energy, infrastructure and critical facilities needing actuator, valve and flow-control support.
Financial Health
StrongStrong · Growing, Hiring · 27% CAGR over 4y
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Computed from 5 filingsManufactures sheet steel fabrications and metal components. Services include design and detailing, laser cutting, folding and forming, welding, finishing and polishing, plus bespoke prototypes,…
Serves B2B clients in architecture, construction, manufacturing, food processing, health, science, pharmaceutical, hospitality, retail, leisure and HVAC sectors.
Financial Health
HealthyHealthy · Hiring · 4% CAGR over 4y
Location
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Computed from 5 filingsManufactures, repairs and modifies propshafts for vehicles and industrial applications. Supplies new and reconditioned propshafts and components including universal joints and centre bearings, and…
Serves a mix of B2B and consumer customers across the UK, including vehicle owners, repair workshops, fleet operators, motorsport users, and organisations running trucks, buses, 4x4s, industrial,…
Financial Health
HealthyHealthy · Hiring · 4% CAGR over 4y
Location
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Computed from 5 filingsDesigns and manufactures industrial centrifugal and axial fans, including ATEX and IECEx certified systems for hazardous environments. Supplies bespoke ventilation equipment and provides…
Serves industrial businesses and engineering teams in chemical, nuclear, automotive, oil and gas, marine, power generation, food and drink, defence and energy sectors, including sites with hazardous…
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StrongStrong
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Computed from 5 filingsManufactures and supplies industrial autoclave systems for composite and carbon‑fibre curing. Provides installation, servicing, refurbishment, upgrades, calibration, relocation, spare parts, and…
Serves B2B advanced materials manufacturers, including Formula 1, aerospace, automotive, space and defence organisations, from aerospace primes to automotive start-ups needing composite curing…
Financial Health
HealthyHealthy · Hiring · 9% CAGR over 4y
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Computed from 5 filingsManufactures spur and helical gears, gearboxes and shafts for industrial applications. Provides subcontract gear production and precision machining including turning, milling and grinding of…
Serves international B2B customers, including civil and defence organisations, OEMs and industrial manufacturers needing subcontract gear, gearbox and machined component supply for production and…
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
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Computed from 3 filingsDesigns and manufactures hydraulic cylinders, piston and bladder accumulators, gas bottles, pressure vessels, and rotary actuators and distributors for industrial applications. Also provides…
Serves B2B industrial and heavy engineering customers worldwide, including organisations in renewable energy, subsea, marine, mining, civil engineering, petrochemical, medical, R&D and defence…
Financial Health
StableStable · -3% CAGR over 2y
Location
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Computed from 5 filingsDesigns and manufactures special‑purpose machinery and automated handling systems for industrial applications. Provides engineering, assembly and machine solutions for automotive, food processing,…
Serves B2B industrial manufacturers, including blue-chip companies, in OEM automotive, food, construction and finishing sectors, plus other firms requiring large-scale automation and handling…
Financial Health
HealthyHealthy · Growing, Hiring · 3% CAGR over 4y
Location
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Computed from 5 filingsDesigns and manufactures electrofusion wire laying systems used to produce electrofusion fittings for joining thermoplastic pipes. Also develops leather testing and measurement equipment, and…
Sells primarily B2B to manufacturers of electrofusion fittings for thermoplastic pipe joining, leather processors needing test equipment, and automotive and logistics businesses buying lift and…
Financial Health
StableStable · -65% CAGR over 4y
Location
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Computed from 5 filingsDesigns and manufactures industrial centrifugal and axial fans, including ATEX and IECEx certified units for hazardous and process environments. Provides bespoke fan systems, installation,…
Serves industrial businesses in chemical, nuclear, automotive, oil and gas, marine, power generation, food and drink, defence and energy sectors, including hazardous or explosive environment…
Financial Health
StrongStrong · Growing, Hiring · 4% CAGR over 4y
Location
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Computed from 3 filingsDesigns and manufactures flow instrumentation and process control devices, including flow computers, batch controllers, totalisers, level indicators and load controllers used to measure and control…
Serves industrial B2B customers in process and petroleum sectors, including aviation, fuel depots, oil and gas, refining, chemicals, pharmaceuticals, food and beverage, power, mining, nuclear, gas…
Financial Health
StableStable · Hiring · 17% CAGR over 2y
Location
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Computed from 5 filingsDesigns and manufactures industrial fan systems and air movement equipment, including centrifugal, axial, tunnel and smoke extract fans. Also provides smoke control and ventilation systems,…
Serves B2B customers in power and utilities, construction, transport and industrial sectors, including oil and gas, nuclear, tunnels, commercial buildings, metals, pharmaceuticals, water treatment,…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
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Computed from 5 filingsProvides product development and manufacturing services including prototyping, rapid tooling, mould making, and volume production. Produces moulded components and assemblies such as automotive…
Serves global OEMs and product development teams, especially automotive manufacturers, seeking manufacturing partners for prototype-to-production programmes across UK/Europe and Asia.
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
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Computed from 4 filingsEngineers and manufactures lead and bronze metal products and precision‑engineered components. Supplies specialised materials and complex parts for industries including aerospace, defence,…
Sells to B2B and industrial customers globally, particularly organisations in aerospace and defence, construction, healthcare, marine, nuclear, oil and gas, and security that need engineered metals…
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 3y
Location
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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
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Computed from 5 filingsManufactures special purpose tooling, machinery and automation equipment for manufacturing processes. Provides precision CNC machining services including milling, turning, wire EDM and grinding, and…
Serves B2B manufacturing and engineering companies with production lines, especially operations, maintenance and production teams needing bespoke machinery, CNC capacity, gauges and inspection…
Financial Health
HealthyHealthy · -2% CAGR over 4y
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Computed from 3 filingsDesigns and manufactures hydraulic equipment, specialising in oil and gas accumulators and subsea compensators. Produces gas‑loaded bladder, piston and diaphragm accumulators and bespoke hydraulic…
Serves B2B customers in the global oil and gas sector, including subsea production system providers, fluid control system manufacturers, HPU and WOCS providers, and OEMs supplying major oil…
Financial Health
StableStable · 2% CAGR over 2y
Location
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Computed from 5 filingsProvides powertrain solutions and systems integration for industrial and mobile equipment. Supplies gearboxes, electric drives, motors and control systems, and offers design, CNC machining,…
Serves B2B manufacturers and operators of industrial and mobile equipment, especially in agriculture, construction, groundcare and turfcare, material handling, pumps and compressors, and automation.
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 4y
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Computed from 5 filingsDesigns and manufactures industrial valves for water, steam, boiler, cryogenic and gas systems, including pump‑protection and bellows sealed valves. Provides valve refurbishment, repair, asset…
Serves B2B industrial operators and asset managers in water utilities, dams and reservoirs, LNG, hydrogen and industrial gases, refineries, energy terminals, power and steam plants, nuclear…
Financial Health
WeakWeak · -69% CAGR over 4y
Location
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Computed from 4 filingsDesigns and manufactures radar‑based collision avoidance and proximity warning systems for industrial vehicles and machinery. Supplies integrated radar sensors, control units and alert systems used…
Serves B2B operators of heavy vehicles and mobile plant in quarrying, mining, waste, construction, distribution, ports, recycling, agriculture and airports.
Financial Health
StrongStrong · Growing, Hiring · 20% CAGR over 4y
Location
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Computed from 5 filingsManufactures swarf conveyors, coolant filtration systems and high‑pressure coolant equipment for machine tools. Supplies magnetic separators, oil skimmers, air filtration units and accessories, and…
Targets B2B engineering, aerospace and rail manufacturers using machine tools, with customers in the UK, mainland Europe and worldwide.
Financial Health
HealthyHealthy · -70% CAGR over 4y
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Computed from 5 filingsDesigns and manufactures pneumatic components and systems, including actuators, valves, fittings and air preparation equipment. Provides bespoke engineering services from concept and prototyping…
Sells B2B to OEMs, engineers and manufacturers needing bespoke pneumatic components and control systems, particularly in transportation, electronics, process control, industrial automation, life…
Financial Health
StableStable · -64% CAGR over 4y
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Computed from 5 filingsDesigns and manufactures metal structures, process equipment and components for power generation and petrochemical industries, including heat exchangers, steam and air heaters, boiler feed water…
Sells B2B to power generation and petrochemical operators, including power stations, and to timber treatment plant operators. Serves industrial buyers needing metal fabrications, process plant, heat…
Financial Health
WeakWeak · -6% CAGR over 4y
Location
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Computed from 4 filingsDesigns and builds electrical and software-based control systems for industrial applications. Provides electrical design, control panel manufacturing, software engineering, and system installation…
Serves B2B clients in industrial and infrastructure sectors, including nuclear, rail, aerospace, oil and gas, food and beverage, pharmaceuticals, OEMs, marine, HVAC, waste and recycling, nationally…
Financial Health
StableStable · 0% CAGR over 3y
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How Leeds Advanced Manufacturing companies work and how to sell to them
What they do
Leeds advanced-manufacturing firms usually earn revenue by designing, producing and supporting engineered goods rather than by selling one-off commodity parts. Income tends to combine prototype work, tooling or non-recurring engineering charges, batch production, maintenance and aftermarket spares, with some firms licensing designs or embedding software in physical systems. Pricing is usually quote-led and tied to drawings, materials, tolerances, testing requirements and delivery risk. Margins depend on utilisation, yield, supplier terms and the ability to move from trial orders into repeat production. For sales teams, that means the commercial unit is often a programme, production cell or product line, not a simple user seat.
Who they sell to
Customers are typically industrial OEMs, tiered suppliers, infrastructure operators, research-led buyers and public bodies buying through engineering-led procurement. The named decision-maker may sit in procurement, but technical authority usually rests with engineering, quality, operations or programme management. Deal size varies with application: early work may start as paid feasibility, design-for-manufacture or low-volume trial runs, then expand into framework supply, repeat batches or service support once qualification is complete. Most sales cycles are measured in months rather than weeks, especially where drawings, material certificates, safety cases or site acceptance tests are involved. Channels are mainly direct, with partner or distributor routes where the product is exported or integrated into larger systems.
What they buy
Most Leeds advanced-manufacturing firms tend to spend on systems that reduce production variance, protect margin and keep compliance evidence in order. Plausible categories include ERP, manufacturing execution, product lifecycle management, CAD and simulation, quality management, maintenance planning, inventory control, supplier-risk tracking and cyber security. They also buy metrology, test equipment, tooling, industrial automation, energy-management support and health-and-safety services. Professional-services budgets often sit around certification, export paperwork, grant applications, R&D tax work, contract negotiation and recruitment for engineers, machinists and quality roles. Cloud and analytics pitches can fit, but they usually need to connect to shop-floor constraints rather than generic technology-modernisation language.
Why and how to sell to them
Buying intent often appears when firms win a new framework, add a production shift, bring inspection in-house, prepare for UKCA or CE work, change operations leadership, raise finance for equipment, or move from prototype to repeat manufacture. Common pain points are scrap, rework, late supplier deliveries, skills shortages, documentation gaps and customer audits. Outbound messages tend to land better when they name the operational trigger and quantify the risk being reduced, such as fewer rejected batches, shorter quote-to-production handovers or cleaner traceability for audits. Senior buyers are likely to ask for evidence in comparable production settings, not broad claims about productivity.
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
How many advanced manufacturing companies are there in Leeds?
What counts as a advanced manufacturing company in this list?
Which are the largest advanced manufacturing companies in Leeds?
What do advanced manufacturing companies in Leeds actually do?
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What SIC codes does this use?
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