Turn this list into pipeline.
Aerospace Companies in Portsmouth: 33 Active Firms (2026)
Aerospace manufacturers in Portsmouth make aircraft parts, structures and systems for CAA-regulated aviation supply chains.
Buying decisions tend to sit with engineering, quality and procurement teams at higher-tier manufacturers, maintenance organisations, systems integrators and specialist distributors. Portsmouth-area suppliers in this cohort look more like specialist production shops than prime contractors: precision machining, composites, electronics, fabrication, inspection and assembly capabilities are sold into regulated programmes where traceability matters as much as unit cost. Engagements are usually repeat supply, framework or work-package relationships rather than self-service transactions, with qualification cycles shaped by audits, production readiness and documentation. The most relevant buyers are civil aviation supply-chain teams that need outsourced capacity close enough to visit, inspect and qualify.
Read more
Portsmouth has 33 actively trading aerospace manufacturers in this cohort, a small local supply base rather than a broad national cluster. Reported employment across the cohort totals 381 people, which fits the profile of lean production and engineering teams serving higher-tier customers. Only 4 firms report turnover above £5M, while 3 were incorporated since 2022, so the local picture is less about a wave of new entrants and more about specialist workshops and component suppliers operating within established procurement channels. For researchers, the useful read-across is capacity and certification depth rather than pure company count.
Manufacturers supplying regulated aviation products operate inside the CAA airworthiness and certification framework, with production-organisation approval relevant where aircraft products, parts or appliances are placed into civil aviation supply chains. That pushes commercial risk into documentation, inspection records, configuration control and change management, not just machining or assembly capability. ADS frames the market as export-facing, and alignment with European and US certification expectations matters for parts that move across borders. For Portsmouth suppliers, a defensible quality system may be as commercially important as location, capacity or price.
Portsmouth's aerospace manufacturing base appears weighted towards established specialist suppliers rather than venture-style entrants, so change is likely to come through procurement requirements, audit expectations and customer consolidation rather than a rush of new companies. Suppliers with traceability, inspection and documentation discipline tend to be better placed when higher-tier customers rationalise approved-vendor lists. Smaller workshops may remain viable where they hold difficult-to-replace process knowledge, but they face pressure from qualification costs and longer payment cycles. The sector therefore looks more like a capacity-and-compliance market than a start-up formation story.
33
Active firms
2026
4
Above £5M turnover
in Portsmouth
3
Incorporated since 2022
in Portsmouth
Key facts
About 12% of the trading cohort reports turnover above £5M (4 of 33 firms) — the rest sits below that revenue band.
9% of the cohort was incorporated since 2022 (3 firms), so a sizeable share is in its first few filing cycles.
UK Part 21 Subpart G production-organisation approval applies to regulated production of Part 21 aircraft, products, parts and appliances.
ADS’ 2024 aerospace outlook puts UK aerospace employment at 104,000 people, with £30.5 billion of turnover and £20 billion of exports.
A US government market guide says 70% of domestic aerospace production is exported, reflecting the sector’s exposure to cross-border certification and customer requirements.
CAA alignment with EASA and the US FAA matters for internationally traded aerospace products, particularly parts, structures and aircraft systems.
The UK does not produce large civil aircraft, so the manufacturing base is more concentrated in components, engines, helicopters, wings, structures and aircraft systems.
Top Portsmouth Aerospace companies
Lefay Engineering Limited
Trajectory
4y · 2022–NowDesigns and manufactures precision fuel system components for light aircraft, including fuel pumps, filters, selectors, gascolators, check valves, locking fuel caps and throttle quadrants. Supplies…
Serves amateur aircraft builders, kit-plane manufacturers, and sport/general aviation owners/operators needing components for amateur-built and certified light aircraft, with some commercial aviation…
Financial Health
Insufficient historyInsufficient history
Location
WICKSHIRE ENGINEERING LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides subcontract precision CNC machining services, including 5‑axis machining, CNC milling and turning, producing simple to complex components in metals and plastics for sectors such as…
Serves B2B customers in the petrochemical, aerospace, medical, marine, pharmaceutical and electronics sectors, including engineering and procurement teams in Hampshire and worldwide.
Financial Health
HealthyHealthy · 4% CAGR over 2y
Location
Fitztech Machining Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides precision CNC machining services including milling and turning to manufacture custom metal and plastic components. Produces engineered parts for sectors such as medical, motorsport, defence,…
Serves businesses and defence buyers in medical/biomedical, motorsport and automotive, military/MOD, marine, construction and aerospace sectors, mainly around Portsmouth, Hampshire, Dorset, Wiltshire…
Financial Health
StableStable · -36% CAGR over 4y
Location
Portsmouth Aviation
Provides precision engineering and manufacturing services including CNC machining, metal fabrication and welding, metal and paint finishing, and component qualification, inspection and testing,…
Serves B2B customers in precision engineering sectors, particularly project teams and manufacturers needing bespoke engineering support, production capabilities, and qualification or testing input.
Location
J M Automatics Limited
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsProvides precision CNC milling and turning services, producing machined components for sectors including aerospace, medical, military, marine and motorsport. Offers finishing, assembly and design…
Serves B2B customers in aerospace, medical, military, marine, motorsport and commercial sectors, including buyers needing bespoke one-off components or large-volume production runs.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 3y
Location
ENL GROUP LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures plastic injection‑moulded components and associated tooling. Provides in‑house product design, mould tool engineering and high‑volume production, with warehousing and delivery of…
Serves B2B manufacturers in aerospace and defence, medical and bioscience, electronics, automotive and logistics, including NHS equipment suppliers and major car manufacturers across Europe.
Financial Health
StableStable · -69% CAGR over 4y
Location
Portsmouth Aviation
Provides precision engineering and manufacturing services including CNC machining, metal fabrication, metal finishing, paint and protective coatings, and qualification, inspection and testing. Also…
Serves B2B customers in precision engineering industries, particularly organisations managing projects that require bespoke manufactured components and in-house engineering support.
Location
Remas HDG Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns, manufactures and repairs carbon fibre components. Provides bespoke parts, reverse engineering and composite processing for motorsport teams, luxury and performance cars, marine applications,…
Serves B2B and high-end private clients in motorsport, exotic automotive, marine, medical, film and TV, and private aviation, including race teams, luxury car owners, yacht owners, and buyers for…
Financial Health
HealthyHealthy · Hiring · 16% CAGR over 4y
Location
PHASE ONE HOLDINGS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and manufactures high‑resolution digital cameras and imaging systems for aerial mapping, geospatial surveying, cultural heritage digitisation, space missions, industrial inspection, and…
Sells to geospatial mapping and surveying firms, UAV inspection and security operators, space mission teams, cultural heritage digitisation institutions, and professional landscape or studio…
Financial Health
StableStable · 0% CAGR over 4y
Location
Precision Metal Polishing Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides precision metal finishing services including polishing, deburring, blasting and barrelling of engineered components. Uses processes such as vapour blasting, vibro polishing and super…
Serves B2B customers in aerospace, nuclear, power generation, automotive, industrial, construction and commercial sectors, particularly organisations working with precision metal components.
Financial Health
StrongStrong
Location
Southdown Aero Services Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides aircraft component manufacturing, maintenance and repair services for the aerospace sector, with CAA/EASA Part 145 maintenance and Part 21G production approvals, plus aircraft-on-ground…
Serves B2B customers in the aerospace sector, including aircraft operators, airlines, maintenance organisations and manufacturers needing certified UK CAA/EASA/EN9100 suppliers.
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
Percival Aviation Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns, manufactures, certifies and maintains aircraft interior components and equipment for commercial and specialist aircraft. Products include cabin fittings, lavatory and door components, seat…
Serves airlines, aircraft operators and aviation organisations needing certified aircraft interior components and cabin refurbishment support, including commercial aircraft and specialist helicopter…
Financial Health
StableStable · 2% CAGR over 4y
Location
L.F.D. Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures LED lighting systems for military and commercial aircraft and ground vehicles, including anti‑collision, position, formation, landing and infrared lights. Provides optical…
Serves B2B defence and aerospace customers, especially military fixed-wing and rotary aircraft operators, avionics integrators and ground vehicle programmes, plus external customers needing…
Financial Health
HealthyHealthy · Growing · 2% CAGR over 4y
Location
BARNBROOK SYSTEMS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures and distributes motion control and electro‑mechanical switching equipment, including relays, solenoids, power controllers, circuit breakers and pressure transducers, supplying components…
Serves B2B customers in aerospace, defence, security and space, including OEM supply chains and engine control repair organisations requiring certified electro-mechanical components.
Financial Health
HealthyHealthy · Hiring · 18% CAGR over 2y
Location
A. C. W. Engineering Services Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides precision engineering and machining services including component manufacture, assembly, inspection, and hydraulic and pneumatic testing. Produces batch and prototype parts and equipment such…
Serves B2B clients in defence, nuclear, aerospace, explosion suppression, fire detection and yacht racing, from small local projects in Hampshire to major national work and international customers.
Financial Health
StrongStrong · Hiring · 4% CAGR over 4y
Location
AEGINA TECHNOLOGIES LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides subcontract precision engineering services manufacturing machined components and assemblies using CAD/CAM, CNC milling and CNC turning. Also offers assembly and finishing processes for…
Serves B2B customers in engineering supply chains, especially aerospace, oil and gas, and underwater sectors, that require subcontract-manufactured components and assemblies.
Financial Health
HealthyHealthy · -79% CAGR over 3y
Location
Dfs Composites Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures composite tooling, plugs and moulds for industrial applications. Provides engineering, design and manufacturing services including large-scale composite mould production and…
Serves B2B manufacturers in the composites sector, particularly companies in the wind energy, aeronautical and maritime industries needing tooling, moulds and composite structures. Targets industrial…
Financial Health
StrongStrong · Growing, Hiring · 32% CAGR over 4y
Location
Southbourne Rubber Company Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures precision rubber and elastomer sealing components including O‑rings, grommets, extrusions and custom moulded parts. Provides rubber-to-metal bonding, materials development and…
Serves B2B and public-sector customers in aerospace, defence, medical, marine, energy and engineering, including commercial and military aerospace platforms, MOD/DoD supply chains and specialist…
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
Location
Repro Engineering Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides CNC precision engineering and machining services, producing turned and milled components using sliding head, fixed head, chucking and grinding processes. Manufactures high‑volume parts and…
Serves B2B customers in aerospace, defence, medical and commercial sectors, including manufacturers needing precision-machined components and assemblies in batch sizes from small runs to high-volume…
Financial Health
WeakWeak · 0% CAGR over 4y
Location
Dt Precision Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures precision machined components, tooling and fabricated parts. Provides CNC milling, turning and jig boring services for sectors including aerospace, pharmaceutical, nuclear, marine and…
Serves businesses and organisations in aerospace, pharmaceutical, nuclear, marine and defence sectors, typically engineering, production and procurement teams sourcing specialist precision…
Financial Health
DistressedDistressed · -13% CAGR over 4y
Location
UNIVERSAL TOOL AND PRODUCTION COMPANY LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures high‑precision engineered components for sectors including oil and gas, aerospace and defence, nuclear, marine and motorsport. Provides CNC milling, turning, grinding and measurement…
Serves B2B engineering and procurement teams in oil and gas, aerospace and defence, nuclear, marine and motorsport, including organisations needing production, prototype and pre-production precision…
Financial Health
HealthyHealthy · -68% CAGR over 5y
Location
R K PRECISION LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides CNC machining and precision engineering services, including CNC milling and CNC turning. Manufactures precision components using multi‑axis machining centres for industries such as…
Serves UK businesses in motorsport, aerospace and general engineering, including teams needing one-off prototypes, short runs or volume production of precision components.
Financial Health
DistressedDistressed · 0% CAGR over 2y
Location
IES Machining Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides precision engineering and CNC machining services, including 5‑axis CNC milling, multi‑axis and 3D machining, CNC turning and mould machining. Manufactures bespoke machined components and…
Serves B2B engineering and manufacturing customers in rail, automotive, Formula 1 motorsport, aerospace, marine, electronics and process machinery.
Financial Health
HealthyHealthy · Hiring · 6% CAGR over 2y
Location
PORTCHESTER ENGINEERING LIMITED
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsManufactures precision‑machined components using CNC and 5‑axis machining. Produces prototypes and small to large production batches of complex parts, with in‑house inspection and quality control for…
Serves B2B engineering and manufacturing customers in the UK and internationally, including major companies in marine, oil, motorsport, military, food production, aerospace, subsea, medical,…
Financial Health
StableStable · -4% CAGR over 3y
Location
PRECISION LAPPING LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides precision flat lapping services for metal and non‑metal components, achieving high levels of flatness, parallelism, and surface finish. Processes parts for industries including aerospace,…
Serves B2B manufacturers and engineering firms in aerospace, defence, motorsport, medicine, science and research, telecommunications, transport and general engineering, including aircraft, motor,…
Financial Health
StableStable · 0% CAGR over 4y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsManufactures precision engineered components using 5‑axis CNC milling, CNC turning and multi‑axis machining. Produces bespoke machined and turned parts, mould machining and finishing processes for…
Serves B2B engineering and manufacturing customers in rail, automotive, F1 motorsport, aerospace, marine, electronics and process machinery sectors requiring precision machined components and…
Financial Health
StrongStrong
Location
HI-TECH (UK) LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides CNC precision machining services including milling and turning, producing small to large components. Also offers reverse engineering, prototype and product design support, CAD/CAM analysis,…
Sells B2B to engineering and manufacturing customers needing low- to medium-volume, high-precision machined components, prototypes and sub-assemblies, particularly in oil and gas, nuclear, defence,…
Financial Health
HealthyHealthy · -68% CAGR over 4y
Location
HI-TECH PRECISION ENGINEERING (UK) LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides CNC precision machining services including milling and turning, producing low- to medium-volume machined components. Offers reverse engineering, CAD/CAM-supported product design, prototype…
Serves B2B engineering and manufacturing customers in oil and gas, nuclear, defence, automotive, rail, aerospace, marine and printing machinery sectors, especially low- to medium-volume…
Financial Health
HealthyHealthy · -66% CAGR over 4y
Location
HILLCREST MACHINERY & ENGINEERING (PORTCHESTER) LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides precision engineering and CNC machining services including 5‑axis machining, CNC milling and turning, manual machining, and component manufacture. Produces bespoke and batch metal components…
Serves B2B engineering and procurement teams at manufacturers in aerospace, defence, automotive, motorsport, marine, pharmaceutical, oil and gas, petrochemical and renewables sectors.
Financial Health
WeakWeak · -3% CAGR over 4y
Location
PENTA PRECISION ENG. LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides precision CNC machining services, including milling, turning and 5‑axis machining, producing custom metal and plastic components. Offers prototype machining, design‑for‑manufacture support,…
Serves B2B procurement, engineering and supply chain teams in aerospace, pharmaceutical and medical, scientific, electronics, defence, marine, OEM, R&D, and processing and packaging sectors.
Financial Health
HealthyHealthy · Hiring · 18% CAGR over 4y
Location
UTP HOLDINGS LIMITED
Trajectory
2y · 2025–NowFinancial sub-scores
Computed from 2 filingsManufactures precision‑engineered metal components and assemblies using CNC milling, turning and grinding. Produces prototype, pre‑production and production parts from high‑strength and exotic…
Serves B2B engineering and procurement teams in oil & gas, aerospace, defence, nuclear, marine and motorsport sectors, particularly organisations needing high-tolerance components for extreme…
Financial Health
StableStable
Location
STS Defence
Designs, manufactures and integrates mission‑critical communications, electronic warfare and instrumentation systems for defence platforms. Provides communications masts, satellite communications…
Serves public-sector defence bodies and prime contractors in naval and air defence, alongside aerospace, marine and nuclear organisations such as Royal Navy, Submarine Delivery Agency and Typhoon…
Location
ARCHOAK AVIATION LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · 0% CAGR over 4y
Location
INTELIPORTS LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsFinancial Health
StrongStrong · Hiring · 116% CAGR over 2y
Location
Fenwood Bowen Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures plastic components using vacuum forming and CNC machining. Provides prototyping, tooling, trimming and assembly services, producing industrial covers, trays and custom…
Sells to businesses needing plastic components and formed parts, from family-run firms to blue chip corporations. Serves product development and manufacturing teams in sectors including automotive,…
Financial Health
StableStable · Hiring · 4% CAGR over 4y
Location
S J SIEJKO LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsFinancial Health
HealthyHealthy · 0% CAGR over 4y
Location
Unlock all 33 leads
Showing 36 of 33 — +0 more with verified decision-maker contacts, live data, and CRM sync.
How Portsmouth Aerospace companies work and how to sell to them
What they do
Revenue usually comes from quoted manufacturing work rather than usage-priced products: machining runs, composite parts, wiring or electronics assemblies, fabricated items, tooling, inspection and controlled repair work. Pricing tends to combine unit rates with set-up, tooling, material, certification and non-recurring engineering charges, then move into call-off orders once a part is qualified. Margin depends on yield, scrap, machine utilisation and the cost of maintaining quality records. Portsmouth-area firms are often selling controlled production capacity and documented conformity, not just physical components, so proposals have to account for drawings, revisions, batch traceability and inspection evidence.
Who they sell to
Typical customers are higher-tier aerospace manufacturers, maintenance organisations, systems integrators and specialist distributors buying parts or sub-assemblies for civil aviation programmes. The named decision-maker may be a commodity buyer, supply-chain manager, programme manager, manufacturing engineer, quality lead or accountable manager, depending on whether the need is price, capacity, technical capability or compliance. Sales are usually direct, relationship-led and document-heavy, with approved-supplier onboarding, quality questionnaires, site visits and first-article inspection before repeat work. Smaller jobs may begin as prototype or urgent capacity requests; more valuable relationships tend to sit under call-off orders, framework terms or programme-specific work packages.
What they buy
Most aerospace manufacturers tend to spend on systems and services that protect margin while satisfying customer audits. Likely software categories include manufacturing resource planning, quoting and costing, quality management, document control, calibration tracking, non-conformance handling, supplier management, inventory control and production scheduling. Engineering teams may also need CAD-adjacent data management, secure file exchange, inspection reporting and materials traceability. Outside software, relevant spend includes metrology and calibration services, tooling, machine maintenance, specialist recruitment, health and safety support, export paperwork, insurance, accounting and legal advice for customer terms, liability allocation and change-control obligations.
Why and how to sell to them
Buying intent often appears around a customer audit, new programme award, failed delivery milestone, non-conformance issue, machinery investment, premises move or change in quality leadership. Portsmouth aerospace buyers tend to respond to pitches that show how a supplier reduces audit preparation, shortens quote-to-production handover, improves visibility of work-in-progress or lowers the admin burden attached to CAA-aligned traceability. Claims need to be practical: evidence from regulated manufacturing, clear implementation effort, support for existing worksheets or systems, and an understanding that downtime on the shop floor is harder to accept than back-office inconvenience.
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.
Also in Portsmouth
Related directories
Frequently asked questions
How many aerospace companies are there in Portsmouth?
What counts as a aerospace company in this list?
Which are the largest aerospace companies in Portsmouth?
What do aerospace companies in Portsmouth actually do?
How does Portsmouth aerospace compare internationally?
How is this list built and how fresh is the data?
How big are the typical aerospace companies in Portsmouth?
Are these mostly new or established aerospace companies?
What SIC codes does this use?
What buying signals should I look for?
Push these 33 companies into your pipeline.
Find the right decision-makers, see verified company data, and export your list in seconds.