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Metals Companies in Southampton: 86 Active Firms (2026)
Metals companies in Southampton manufacture, process and supply steel and metal components for industrial and construction customers across the city region.
Buying centres tend to be procurement, project engineering and operations teams that need dependable workshop capacity, stock availability and fabrication know-how. Demand comes from construction contractors, industrial maintenance teams, engineering firms and infrastructure supply chains rather than consumer channels. Typical engagements look like repeat supply agreements, fabrication packages, machining jobs, installation support and responsive maintenance work. The better-fit operators have physical production, storage or workshop capability around Southampton, so buyer assessment usually turns on lead times, tolerances, certification requirements and whether the supplier can handle practical site constraints as well as materials supply.
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Southampton has 86 actively trading companies in this metals cohort, a compact supplier base serving industrial and construction demand across the city region. Reported employment stands at 886 people, which points to a visible workshop and site-delivery footprint rather than a purely agency-led trading market. The profile is mostly small and mid-market, with activity spread across fabrication, processing, stockholding and installation work. For researchers, the useful denominator is the active company count: it captures the firms currently trading in this list, not a wider universe of dormant, historic or purely financial entities.
For Southampton operators, the practical compliance load sits in workplace safety, lifting, welding, product traceability and customer certification, rather than a single sector licence. Construction-facing suppliers are often pulled into main-contractor audit regimes, where insurance, method statements, material provenance and site access controls shape who gets repeat work. Industrial customers tend to care about tolerance, delivery reliability and documentation as much as price. That makes the market fairly process-heavy for small workshops, particularly where a supplier moves beyond standard stockholding into fabrication, machining or installation on customer sites.
The local market appears likely to remain service-led, with buyers favouring nearby suppliers that can combine materials access with practical workshop response. Owner-managed and small mid-market firms tend to be resilient where they hold customer relationships in maintenance, construction and engineering supply chains, but scaling beyond that base can be difficult without investment in people, equipment and certification. Consolidation may appeal where succession issues meet demand for steadier capacity, although many operators are likely to stay deliberately specialist rather than chase broader regional coverage.
86
Active firms
2026
4
Above £5M
disclosed turnover
7
Since 2022
new incorporations
Key facts
About 4% of the trading cohort reports turnover above £5M (4 of 86 firms) — the rest sits below that revenue band.
8% of the cohort was incorporated since 2022 (7 firms), so a sizeable share is in its first few filing cycles.
Southampton’s metals activity is centred on fabrication, processing and supply rather than upstream metals production.
Industrial and construction buyers appear to shape demand, with purchasing tied to project delivery cycles.
Steel and other metal components form the core product set for operators serving the city region.
Top Southampton Metals companies
INDUSTRIAL PROFILES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures industrial roofing and cladding products, including roll‑formed and custom‑pressed metal sheets, flashings, gutters, and related fabrications and fixings, and provides powder coating…
Serves B2B customers in the industrial roofing and construction sectors, including roofing and cladding contractors, façade installers and building contractors working on commercial, education and…
Financial Health
HealthyHealthy · Hiring · 6% CAGR over 4y
Location
Haig Engineering Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides precision engineering and metal fabrication services including CNC machining, coded welding, waterjet and plasma profile cutting, and metal polishing. Produces custom components, prototypes…
Serves UK businesses and project owners needing prototypes or high-volume production, across marine, civil engineering, architecture, petrochemicals, pharmaceuticals, food production, classic vehicle…
Financial Health
StableStable · -5% CAGR over 4y
Location
CJR PROPULSION HOLDINGS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures marine propulsion components including CNC‑machined Class S propellers, flow‑aligned rudders, shafts, brackets and complete sterngear systems. Provides bespoke design, CFD…
Sells B2B to commercial vessel operators, leisure boat and motor yacht brands, superyacht builders and marine OEMs needing bespoke or replacement propellers, rudders and sterngear systems.
Financial Health
HealthyHealthy · -90% CAGR over 2y
Location
Seagrave Metal Works Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StableStable · 0% CAGR over 2y
Location
BSA REGAL ENGINEERING LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides subcontract precision engineering services including CNC milling and turning, welding and fabrication, and sheet metalwork. Produces machined and fabricated components, prototypes and…
Serves B2B manufacturers and engineering buyers in marine, renewable energy, medical, food, defence and tobacco industries, from prototype and one-off requirements to volume production needs.
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
KRUEGER LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides custom steel machining, welding and fabrication services. Manufactures specialized weldments, machined components, structural frameworks and walking bridges to engineering specifications,…
Serves mining companies, industrial machinery operators, engineering-led project teams, small businesses, and homeowners needing custom steel, machining, welding, fabrication, or repair support.
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
Location
LATBROS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides marine metal fabrication and welding services working with aluminium, stainless steel and steel. Builds custom aluminium workboats, fabricates yacht solar and radar arches, and carries out…
Serves private boat owners, yacht and catamaran owners, and commercial marine operators needing bespoke metalwork, boat builds, repairs, refits and marine fabrication, with a stated global client…
Financial Health
StrongStrong · Growing, Hiring · 32% CAGR over 4y
Location
Mark Cole Metal Forming Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · Hiring · 32% CAGR over 4y
Location
ALDEN SHEETMETAL FABRICATIONS LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides sheet metal fabrication services including cutting, welding and tube bending. Produces stainless steel and aluminium components such as cabinets, handrails, machine guards, ventilation…
Serves industrial and commercial clients in building, marine, catering, factory/warehousing and signmaking, plus members of the public seeking off-cut sheet metal, tubing or stainless steel.
Financial Health
HealthyHealthy · -2% CAGR over 5y
Location
CONCEPT METALCRAFT LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, fabricates and installs bespoke metalwork including gates, railings, balustrades, staircases, balconies and steel fencing. Provides custom metal fabrication, structural steel supply, hot-dip…
Sells to private property owners and contractors needing bespoke metalwork, gates, railings, balustrades and structural steel. Serves clients across multiple industries, including buyers for…
Financial Health
WeakWeak · -71% CAGR over 4y
Location
DISBUDAK PLUMBER AND PIPING LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsManufactures aluminium components using sand casting, investment casting and gravity die casting processes. Provides CNC machining, non‑destructive testing and powder coating to deliver finished…
Serves B2B customers in manufacturing and engineering sectors, including aerospace, automotive, defence, rail, test and measurement equipment, and general engineering, across the UK and worldwide.
Financial Health
StrongStrong · Hiring · 10% CAGR over 4y
Location
COSENS MARINE & GENERAL LIMITED
Trajectory
3y · 2024–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StableStable
Location
DR Newco Limited
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsFinancial Health
WeakWeak · 0% CAGR over 1y
Location
Detailed Drawing Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · 0% CAGR over 4y
Location
BD Marine Ltd
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides marine engineering services including fabrication, machining, manufacturing, servicing and repair of vessels and equipment. Manufactures and tests lifting gear and cable working equipment,…
Serves private boat owners and commercial marine operators, including classic yacht owners, commercial shipping companies, subsea cable laying and recovery firms, and operators of small craft,…
Financial Health
StableStable · -4% CAGR over 4y
Location
A K Precision Engineering Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
WeakWeak
Location
I L Tooling Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
WeakWeak · 0% CAGR over 4y
Location
THE BIFOLD AND LANTERN COMPANY LTD
Trajectory
4y · 2022–NowFinancial Health
Insufficient historyInsufficient history
Location
K&S AEROSPACE COMPONENTS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures and repairs aerospace components, offering TIG, spot, seam and orbital welding alongside turning, milling and sheet metal fabrication. Produces one-off and batch parts and provides…
Serves aerospace-sector businesses and engineering teams in the Southampton area needing one-off or batch components and component repairs.
Financial Health
WeakWeak · -5% CAGR over 2y
Location
HILLCREST STRUCTURAL LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, fabricates, supplies and installs structural steelwork and ancillary steel components for construction projects. Provides in‑house design, manufacturing and site erection services, including…
Serves local builders, main contractors and construction-sector design teams across the UK, particularly those delivering refurbishment projects.
Financial Health
StableStable · -68% CAGR over 4y
Location
JDS Engineering Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFabricates and installs architectural metalwork including balustrades, staircases, stainless steel and glass balconies, and structural steel. Provides welding, fabrication and site installation…
Serves construction contractors, property developers and building owners commissioning architectural metalwork, staircases, stainless steel and glass balconies, walkout balconies and structural steel…
Financial Health
DistressedDistressed · -20% CAGR over 4y
Location
S & D WILSON LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns, manufactures and installs bespoke staircases, balustrades and architectural metalwork for commercial and residential developments, including helical, spiral and straight staircases, using…
Serves main contractors, architects, project managers, property developers and private clients on large-scale and one-off commercial or residential developments.
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
K. & T. (Engineers) Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
StableStable · -11% CAGR over 5y
Location
CONJA LIMITED
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides structural steel fabrication and steelwork services, including design, manufacture and installation of builders’ beams, mezzanine floors, gates and railings. Undertakes domestic and…
Serves homeowners, private clients, builders, architects, engineers and commercial or industrial organisations involved in construction, extensions and building projects in Hampshire and wider UK.
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 4y
Location
D & R Structures Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies and fabricates structural steelwork and architectural metalwork for construction projects. Produces and installs items such as balconies, balustrades, gates and staircases, and provides…
Sells to construction businesses, especially main contractors and smaller building companies, for projects in education, healthcare, residential, industrial and community buildings such as schools,…
Financial Health
HealthyHealthy · Hiring · 6% CAGR over 4y
Location
SEAWAY ESTATE MAINTENANCE LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides engineering and metalworking services including steel fabrication, coded welding, pipework installation and repair, structural steelwork, and precision machining. Offers site engineering,…
Serves B2B industrial customers, especially steelworks, manufacturers and heavy engineering sites needing on-site support, fabrication and machining during projects, breakdowns, downtime or shutdown…
Financial Health
StableStable
Location
Gecko Metal Works Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides sheet metal fabrication services including CNC laser cutting, brake press folding, and MIG/TIG welding. Works with materials such as mild steel, stainless steel, aluminium, copper and brass…
Targets industrial, commercial and creative customers in Hampshire, including businesses, tradespeople, designers and project owners commissioning custom sheet-metal work and fabrication for one-off…
Financial Health
StableStable · Hiring · 3% CAGR over 4y
Location
V & F SHEET METAL COMPANY LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides sheet metal fabrication and subcontract engineering services, including CNC punching, laser cutting, bending, welding, and press work. Produces custom metal components and assemblies such as…
Serves UK businesses sourcing sheet metal components and fabrications, including engineering, manufacturing and lighting industry buyers needing one-off prototypes, small batches or higher-volume…
Financial Health
StableStable · 0% CAGR over 3y
Location
Instant Fabrications Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides sheet metal fabrication and welding services, producing custom steel items such as gates, fencing and other metalwork for domestic and commercial projects, with delivery and on-site…
Serves homeowners and commercial premises owners or managers in Eastleigh, Southampton and Bournemouth with domestic and business metalwork project needs.
Financial Health
StableStable · 0% CAGR over 2y
Location
DAVID BOWLER & SONS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures metal pressings and deep-drawn components for industrial sectors. Provides in-house tooling design and production, sheet metal punching, shearing and cutting, plus deburring, assembly…
Serves B2B customers in automotive, defence, aerospace, electronics, metal packaging, public utilities, heating and ventilation, and construction markets, including organisations sourcing volume…
Financial Health
StableStable · -2% CAGR over 4y
Location
Armorduct Systems Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures steel cable management systems for electrical installations, including cable trunking, tray, ladder and basket systems, floor boxes and power track. Also designs and produces bespoke…
Serves B2B buyers in construction and infrastructure, including electrical contractors, installers, rail industry projects, data centres, and commercial or industrial facilities needing standard or…
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
PRECISION FABRICATIONS ANDOVER LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures bespoke sheet metal products and specialist metalwork. Provides CNC laser cutting, punching, folding, welding, and CAD design, and produces components such as curtain walling, cladding,…
Serves B2B customers in construction, automotive, agriculture, electrical and healthcare, including contractors, manufacturers and machinery distributors, as well as residential customers seeking…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
TELMAR CNC LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides subcontract precision engineering services including CNC turning and CNC milling of metal components. Also arranges finishing treatments such as anodising, plating and painting, and performs…
Serves B2B customers needing subcontract precision machining, including engineering and manufacturing firms requiring CNC turning, CNC milling, metal finishing, inspection reports and repeat supplier…
Financial Health
StableStable · Hiring · 2% CAGR over 5y
Location
Brooks Crownhill Patternmakers Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures metal castings using precision sand, gravity die and low‑pressure casting processes. Provides pattern and tool making, CNC machining, assembly, inspection and non‑destructive testing,…
Serves B2B engineering and manufacturing customers in automotive, motorsport, aerospace/defence, electronics, renewable energy, marine, broadcast, medical and railway sectors, including product…
Financial Health
DistressedDistressed · -14% CAGR over 2y
Location
ALIKRAFT LIMITED
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsManufactures rack‑and‑pinion passenger and material hoists and industrial lifts for construction and infrastructure sites. Produces pressure relief valves designed to protect pressurised systems, and…
Sells B2B to industrial and infrastructure operators, including thermal power plants, cement plants, construction projects, and other heavy industrial sites needing hoists, lifts, and pressure relief…
Financial Health
HealthyHealthy · 0% CAGR over 3y
Location
B.S.A. MOTOR CYCLES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides precision engineering and fabrication services including CNC milling, manual turning, and production of machined and sheet‑metal components and special‑purpose machines. Also manufactures…
Serves B2B industrial customers, including oil, gas, power generation and refining companies, plus manufacturers needing precision-engineered components, prototypes, assemblies or special-purpose…
Financial Health
StableStable
Location
PUDSEY DIAMOND ENGINEERING LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides design and manufacture of traffic bollards, street lighting columns, decorative lanterns and brackets, feeder pillars, electrical enclosures, and solar lighting infrastructure for highways,…
Serves local authorities, highways contractors, street lighting specifiers and public-realm project teams working on roads, motorways, conservation areas, residential streets and parks.
Financial Health
WeakWeak · -11% CAGR over 2y
Location
RIGGING PROJECTS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures marine deck hardware and rigging components for sailing yachts, including race blocks, batten car systems and twin rudder steering systems. Provides textiles, CNC machining,…
Serves the marine sector, including yacht and superyacht builders, sailing teams, boat owners and refit projects needing specialist deck hardware, textiles and steering-system support.
Financial Health
StrongStrong · Hiring · 41% CAGR over 4y
Location
CANNON TECHNOLOGIES LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDesigns and manufactures server racks, cabinets and enclosure systems for data centre and communications infrastructure, including 19‑inch racks, modular data centres, aisle containment, power…
Serves B2B infrastructure customers, including data centre operators, telecoms and fibre network providers, rail projects and organisations with medium to large IT installations.
Financial Health
HealthyHealthy · 1% CAGR over 3y
Location
OTTAWAY ENGINEERING LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides CNC precision engineering and subcontract machining services, producing machined components using multi‑axis CNC equipment. Offers one‑hit manufacturing, rapid manufacture, CAD/CAM…
Serves B2B industrial and engineering companies needing subcontract CNC-machined components, particularly buyers with tight tolerance, traceability and quality assurance requirements.
Financial Health
WeakWeak · -3% CAGR over 3y
Location
VERO ELECTRONICS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures electronic enclosures and hardware systems, including 19″ rack cases, cabinets, Eurocard subracks, front panels, and portable metal enclosures. Provides in‑house engineering,…
Serves B2B electronics OEMs and engineering teams in aerospace, defence, automotive, transport, medical, scientific, multimedia, broadcast and telecommunications markets.
Financial Health
StableStable
Location
Ardtully Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides precision engineering and CNC machining services, including CNC turning and milling, design for manufacture, assembly, stockholding, and subcontract treatments. Manufactures…
Serves B2B customers in defence, aerospace, automotive, medical and commercial sectors, including OEMs, tier suppliers and public-sector defence buyers needing precision-engineered components.
Financial Health
DistressedDistressed
Location
WELDSHOP & FABRICATION LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsFinancial Health
HealthyHealthy · -78% CAGR over 3y
Location
M & D Tooling Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed · 0% CAGR over 4y
Location
The Hampshire Shade Company Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
WeakWeak
Location
Ble Engineering Solutions Limited
Trajectory
1y · 2024–NowProvides pipe fabrication, welding, and pipefitting services for industrial projects, producing fabricated pipework and assemblies and carrying out precision welding and installation work with a…
Financial Health
Insufficient historyInsufficient history
Location
A.W. JEFFREYS (SOUTHAMPTON) LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDesigns, fabricates, and installs bespoke architectural metalwork for construction projects, including balustrades, balconies, staircases, gates, railings, walkways, access ladders, and structural…
Serves architects, main building contractors and construction-sector clients needing bespoke architectural metalwork for commercial, residential, healthcare, education and civic projects,…
Financial Health
StableStable · 0% CAGR over 3y
Location
RHH Franks Limited
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsManufactures precision engineered components and assemblies for aerospace and related industries. Provides CNC machining, dip brazing, sheet metal fabrication, heat treatment, chemical processing,…
Serves B2B organisations in aerospace, nuclear, defence and marine supply chains, from engineering teams needing prototypes to buyers sourcing batch-manufactured components and assemblies.
Financial Health
StableStable · 5% CAGR over 1y
Location
South Devon Tours Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsSupplies manufactured metal components and subcontract engineering services for OEM manufacturers, including CNC machining, turned parts production, tube bending, welding, laser cutting, press…
Serves B2B customers in original equipment manufacturing and related industrial sectors, including engineering teams and procurement buyers needing precision metal components and sub-assemblies.
Financial Health
DistressedDistressed · 0% CAGR over 4y
Location
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How Southampton Metals companies work and how to sell to them
What they do
Southampton metals operators usually earn from a mix of material margin and paid workshop time. Stockholders and processors sell steel or other metal products on a priced-per-item, weight or length basis, while fabricators and machinists quote against drawings, tolerances, labour hours, consumables and site requirements. Engagements range from one-off material cuts and repair jobs to fabrication packages attached to construction or plant-maintenance schedules. Installation and maintenance work adds day-rate or fixed-package revenue, often with short-notice premiums where downtime or sequencing matters. Repeat income tends to come from call-off arrangements and preferred-supplier status rather than subscription contracts.
Who they sell to
Most customers are business buyers: construction contractors, facilities and industrial maintenance teams, engineering consultancies, plant operators and infrastructure supply chains. Day-to-day contacts are usually project engineers, contracts managers, operations managers, estimators and procurement teams; finance directors may appear when credit terms, equipment hire or larger project risk are involved. Smaller jobs are often placed through direct enquiry after a drawing, site visit or phone discussion. Larger packages tend to go through tender, framework or approved-supplier lists, with buyers checking insurance, certification, delivery windows and the supplier's ability to cope with changes on site.
What they buy
Most metals firms tend to spend on practical systems and services that reduce job leakage rather than on broad corporate software estates. Common buying areas include quoting and job-costing tools, stock and inventory control, accounting, payroll, CRM, document management, health-and-safety software, drawing management, production scheduling and basic cyber security. On the services side, they buy accountancy, insurance broking, employment law, health-and-safety advice, certification support, training for welders and machine operators, recruitment, vehicle maintenance and marketing that reaches contractors and industrial buyers. Workshop-heavy operators also have recurring needs around lifting equipment, consumables, calibration, PPE, waste handling and energy supply.
Why and how to sell to them
Buying intent often appears when a metals business wins a larger contract, adds equipment, moves premises, takes on site-installation work or changes in operations management. Other triggers are certification renewals, insurance reviews, material-price pressure, recruitment gaps, customer audit failures and rising rework. Outbound messages tend to land better when they are tied to margin protection, faster quoting, clearer traceability, safer site work or lower admin around tenders and delivery paperwork. Generic productivity claims are less persuasive than evidence that a supplier understands workshop constraints: drawings change, materials arrive late, customers chase dates, and downtime can turn a modest fabrication job into a difficult account.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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Frequently asked questions
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