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B2B Companies in Portsmouth: 1,011 Active Firms (2026)
B2B companies in Portsmouth sell products and services to other organisations across the city’s port, professional and industrial economy.
Buying centres in Portsmouth tend to sit in procurement, operations, finance and compliance, with sales led by contracts, subscriptions, framework access or account-managed service relationships. The typical customer is another small or mid-market organisation, although some suppliers sell into enterprise and public-sector procurement where documentation and service continuity matter. Engagements are usually not consumer-style transactions: they look more like retained professional services, managed operational support, industrial supply arrangements, data-processing work, telecoms provision or specialist software subscriptions. That makes buying cycles relatively evidence-led, with attention on references, liability, security, commercial terms and the cost of switching.
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Portsmouth’s B2B base contains 1,011 actively trading companies, including 97 with turnover above £5M and 56 incorporated since 2022. Reported employment totals 3,218 people, spread across 123 firms that publish staff numbers. That points to a city cohort weighted towards established suppliers rather than a purely start-up list: small and mid-market service providers, industrial support businesses, telecoms and processing specialists sit alongside younger firms still proving repeatable business sales.
Regulation sits behind the commercial model rather than defining a single sector boundary. Financial services, telecoms, data processing and professional-services activity each bring different rulebooks, while sales and marketing teams need to treat business-contact details as personal data where UK GDPR applies. ICO guidance on PECR is especially relevant for account-managed outreach: electronic mail to corporate subscribers does not need PECR consent, but senders must identify themselves and offer a valid opt-out route. Live business-to-business marketing calls require CTPS and TPS screening, and organisations must not call businesses that have already objected.
Portsmouth’s cohort appears likely to remain shaped by practical procurement needs: compliance, operational continuity, logistics support, finance administration and outsourced technical capacity. Many firms are likely to compete on account relationships and reliability rather than venture-backed product expansion, which tends to keep the market fragmented. The younger end of the cohort may find openings where regulated customers need auditable processes for data handling, marketing permissions and supplier management. Scale-up scarcity remains a constraint; larger buyers often expect documented controls, service coverage and procurement credentials before switching suppliers. Consolidation may come through succession sales and bolt-on acquisitions rather than a wave of new platform entrants.
1,011
Active firms
2026
97
Over £5M turnover
Portsmouth B2B firms
56
Incorporated since 2022
Portsmouth B2B firms
Key facts
About 9% of the trading cohort reports turnover above £5M (97 of 1,011 firms) — the rest sits below that revenue band.
5% of the cohort was incorporated since 2022 (56 firms), so a sizeable share is in its first few filing cycles.
B2B is not a single licensed industry in the UK; regulation depends on the underlying activity, such as financial services, telecoms, data processing or professional services.
PECR covers direct marketing by live or automated calls, electronic mail and fax.
B2B emails or texts to corporate bodies do not need PECR consent, but senders must identify themselves, provide a valid opt-out address and apply UK GDPR where personal data is processed.
There were 2.73 million VAT and/or PAYE businesses as of March 2025, up 0.4% from March 2024.
DBT estimated 5.5 million private-sector businesses at the start of 2024, including 5.45 million small businesses, 37,800 medium-sized businesses and 8,250 large businesses.
Top Portsmouth B2B companies
SIRIUS ANALYSIS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides technical and management consultancy services including operational analysis, cost engineering, systems engineering, programme and project management (P3M), and business case development.…
Serves UK public-sector bodies and large organisations in defence, energy and sustainability, nuclear, space and transport, including government programme teams making major investment and…
Financial Health
StrongStrong · Hiring · 108% CAGR over 4y
Location
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops software for rail operators including control room systems, revenue protection and enforcement tools, case and appeal management, mobile workforce apps, and reporting dashboards that…
Sells B2B SaaS to UK rail operators and wider transport-sector organisations, especially operations, control room, revenue protection, enforcement, prosecutions, appeals and frontline workforce teams.
Financial Health
StableStable · -75% CAGR over 3y
Location
MDI Networks Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides managed IT services including technical support, cloud infrastructure, cybersecurity and compliance management. Supplies and configures hardware and software, offers software licensing, and…
Serves SMEs and local businesses in the south of England that need outsourced IT support, cloud services, security and compliance, hardware, and software licensing.
Financial Health
HealthyHealthy · -5% CAGR over 2y
Location
Easy Networks Ltd
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides IT and telecommunications services for businesses, including cloud phone systems, Microsoft Teams telephony, business mobiles, broadband and leased lines, WiFi networks, data cabling…
Serves UK businesses and organisations of varying sizes, including education providers, NHS/healthcare bodies, construction firms, charities, care homes and sports facilities.
Financial Health
StableStable · Hiring · 11% CAGR over 2y
Location
Phase One Electronics Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides PCB assembly and electronic manufacturing services, including surface mount and conventional assembly, prototyping, BGA rework, inspection and testing, cable assemblies, and box build…
Serves UK businesses of all sizes, particularly engineering and project teams in regulated or safety-driven sectors including marine, medical, defence, transportation, surveillance and automotive.
Financial Health
HealthyHealthy
Location
PARAGON MARKETING PROJECTS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides B2B lead generation and sales development services, including telemarketing, appointment setting, outsourced SDR support, email marketing, call handling, market research and marketing data…
Targets B2B organisations across multiple sectors, especially sales and marketing leaders needing external support to build pipeline, reach decision-makers and generate qualified opportunities.
Financial Health
StableStable · Hiring · 16% CAGR over 4y
Location
CIRCUIT SUPPLY LIMITED
Trajectory
4y · 2023–NowFinancial sub-scores
Computed from 4 filingsSupplies electrical products and equipment to electricians, contractors and installers. Operates trade counters and warehouse stock, providing product sourcing, order collection and delivery…
Sells to trade customers, primarily electricians, electrical contractors and installers needing domestic, commercial and industrial electrical supplies. Serves businesses across Portsmouth, Hampshire…
Financial Health
WeakWeak · -84% CAGR over 3y
Location
TWISTEDPAIR LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides design, installation and support of workplace technology infrastructure including audio‑visual systems, structured cabling, computer networks and data centre solutions, along with project…
Serves global technology integrators and enterprise businesses, working with IT, AV, infrastructure, project management, design-and-build and workplace teams across offices and data centre…
Financial Health
HealthyHealthy · Growing · 3% CAGR over 3y
Location
RAPID RESPONSE SOLUTIONS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides industrial machinery moving, factory relocation, and technical lifting services. Handles plant dismantling, installation, heavy transport, crane hire, storage, and logistics planning for…
Serves B2B industrial clients, including manufacturers, OEMs and project teams in automotive, defence, food and beverage, aerospace, utilities, packaging, chemicals, pharma, construction, energy and…
Financial Health
WeakWeak · -68% CAGR over 4y
Location
SWAN RECRUITMENT LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides recruitment services for the oil, gas, petrochemical and nuclear sectors, placing contract and permanent staff for EPCM projects. Sources engineers, designers, project managers and technical…
Serves energy owner/operators, EPC/EPCM contractors and supply chain firms, plus contractors and jobseekers, in the oil, gas, petrochemical and nuclear sectors.
Financial Health
StableStable · -71% CAGR over 4y
Location
WEMOVE SOLUTIONS LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides transport management and mobility services, including demand responsive and fixed-route transport operations, call centre and driver support, fleet supply coordination, data reporting,…
Serves transport operators, mobility providers and organisations running DRT, fixed-route or commuter transport schemes, including teams seeking customer support, driver support and data-led service…
Financial Health
StableStable · Hiring · 41% CAGR over 4y
Location
Southern Counties Car Deliveries Ltd.
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides vehicle logistics services including vehicle collection and delivery, fleet reallocation, condition appraisals, secure storage, and export handling. Uses trade plate drivers and tracking…
Serves B2B customers including remarketing and procurement managers, fleet operators, dealerships, and businesses of all sizes needing single-vehicle or fleet movements across the UK.
Financial Health
StrongStrong · Hiring · 41% CAGR over 2y
Location
LIUGONG MACHINERY (UK) LIMITED
Trajectory
4y · 2018–NowFinancial sub-scores
Computed from 4 filingsSupplies and supports construction equipment including excavators, wheel loaders, skid steers, forklifts and aerial work platforms. Provides sales through dealer networks along with parts supply,…
Serves B2B customers including construction contractors, plant hire companies, quarrying and earthmoving operators, industrial sites and equipment dealers, with emphasis on UK and European buyers.
Financial Health
WeakWeak · Hiring · 15% CAGR over 5y
Location
Tempus Services Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides umbrella payroll services for contractors and temporary workers, managing PAYE payroll processing, tax and National Insurance deductions, invoicing to recruitment agencies or end clients,…
Serves contractors, freelancers, recruitment agencies and employment intermediaries as clients and partners that use umbrella payroll arrangements; no specific
Financial Health
WeakWeak · -72% CAGR over 4y
Location
Holloway Iliffe & Mitchell Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides commercial property agency and chartered surveying services, including sales, lettings and acquisitions of office, retail and industrial premises. Also offers property management, lease…
Sells to businesses, landlords, occupiers and property owners seeking commercial and industrial property advice, transactions and management, particularly across Hampshire, Sussex and Dorset.
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
Swift Recruitment Limited
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsProvides recruitment and staffing services, supplying temporary, permanent and temp‑to‑perm workers for industrial, warehouse, manufacturing, waste and recycling, and driving roles. Screens and…
Serves employers in manufacturing, warehouse, waste and recycling, logistics and driving across Hampshire, Heathrow and nearby counties, plus jobseekers seeking temporary, permanent and temp-to-perm…
Financial Health
HealthyHealthy · Hiring · 47% CAGR over 6y
Location
I.M.E. REPAIR SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides electrical, mechanical and fabrication services for marine and industrial sectors, including vessel electrical engineering, breakdown repairs, dry dock support, machining of components,…
Serves B2B customers in the marine and industrial sectors, including vessel owners and operators, ports, contractors and site-based engineering teams needing vessel and plant support.
Financial Health
StrongStrong · Growing, Hiring · 10% CAGR over 4y
Location
345 Technology Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides enterprise integration services on Microsoft Azure, connecting business applications and systems to automate data exchange and processes. Supports migration from legacy integration…
Serves enterprises and larger organisations with complex IT estates, especially Microsoft Azure users, businesses migrating from legacy integration platforms, and teams implementing major systems…
Financial Health
HealthyHealthy · Hiring · 49% CAGR over 4y
Location
MOUNTJOY LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides construction, refurbishment, housing maintenance and facilities management services. Delivers new-build and extension projects, property renovations, responsive repairs, gas servicing, and…
Serves public and private sector clients across southern England, including housing associations, local authorities, schools, academies, colleges, universities, health and care providers, leisure and…
Financial Health
HealthyHealthy · Profitable, Growing, Hiring · 3% CAGR over 4y
Location
Diverse Marine Holdings Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, builds, repairs and refits workboats including crew transfer vessels, patrol boats, pilot boats and fishing vessels. Provides vessel design collaboration, new vessel construction,…
Serves commercial and public-sector marine operators, including offshore wind crew transfer providers, patrol and military users, pilot and rescue organisations, fishing businesses, and workboat…
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
ASTUTE TECHNICAL RECRUITMENT LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides recruitment and staffing services for the energy sector, focusing on power generation, renewable energy and nuclear industries. Places engineers, technical specialists and managers in…
Serves energy employers seeking technical engineers and leaders, especially in power generation, renewable energy and nuclear, across permanent and contract hiring. Also targets engineering,…
Financial Health
WeakWeak · -67% CAGR over 4y
Location
MORRIS CROCKER LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides chartered accountancy and tax advisory services for businesses and individuals, including audit and assurance, bookkeeping, payroll, company secretarial support, cloud accounting, cash flow…
Serves businesses, charities and individuals across Portsmouth, Hampshire and southern England, including medical and dental practices, property firms, landlords, construction businesses, care homes,…
Financial Health
HealthyHealthy · Hiring · 14% CAGR over 2y
Location
GARNEAD LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides piling and civil engineering services including close proximity CFA piling, basement construction, retaining and king post walls, reinforced concrete works, and coastal and marina structures…
Serves B2B and public-sector construction clients, including developers, main contractors and civil engineering teams needing piling, basement, retaining wall, coastal and marina works, especially…
Financial Health
HealthyHealthy · 0% CAGR over 2y
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
Unify HQ Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides recruitment and staffing services connecting candidates with employers across sectors including architecture, construction, engineering, energy, technology, facilities management, and…
Serves hiring companies and jobseekers in architecture, construction, engineering, energy, data centres, defence, facilities management, maritime, plant, and water sectors.
Financial Health
HealthyHealthy · -8% CAGR over 2y
Location
SEA-FIRE EUROPE LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and supplies marine fire suppression and fire detection systems for commercial vessels and pleasure craft, including pre‑engineered and custom systems, extinguishers, lithium‑ion battery fire…
Serves commercial marine operators, boatbuilders, marine dealers and pleasure craft owners, with customers across Europe and the Middle East.
Financial Health
StrongStrong · Growing, Hiring · 3% CAGR over 4y
Location
White Recruitment Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides recruitment and staffing services, placing permanent and contract candidates in logistics, HVAC, mechanical and electrical, and engineering sectors. Sources skilled professionals for…
Serves employers hiring permanent and contract staff, and skilled job seekers, in logistics, HVAC/M&E and engineering across the UK, with logistics coverage in the US.
Financial Health
DistressedDistressed · -2% CAGR over 2y
Location
CDM DECORATING & INTERIORS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides building refurbishment and maintenance services including interior decoration, passive fire protection, electrical and fire alarm installation, insurance reinstatement works, and commercial…
Serves commercial, public-sector and institutional clients, including healthcare, leisure, residential property and insurance sectors, across Hampshire, Surrey, London, Sussex, Dorset and Berkshire.
Financial Health
StrongStrong · Hiring · 63% CAGR over 4y
Location
EE GLASS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsManufactures energy‑efficient glass products for the fenestration industry, including double and triple glazed sealed units, high‑performance coated glass, roof glass, and toughened or laminated…
Serves fenestration businesses, window and door installers, and glazing trade customers along the south coast from East Sussex to Dorset.
Financial Health
StrongStrong · Growing, Hiring · 4% CAGR over 4y
Location
On Site Services (Southern) Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides maintenance, servicing and MOT testing for commercial vehicles including vans, buses and articulated trucks. Offers mobile fleet maintenance, vehicle diagnostics, tail lift inspection and…
Serves owner-drivers and commercial fleet operators across the South Coast, including businesses running vans, HGVs, articulated trucks, buses and coaches that need vehicle maintenance, MOT, recovery…
Financial Health
StrongStrong · Growing, Hiring · 20% CAGR over 4y
Location
Southern Window & General Cleaning Company Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides commercial and industrial cleaning services for business premises and facilities, including window cleaning, pressure washing, gutter clearance, pest control and prevention, and specialist…
Serves commercial and industrial organisations on the South Coast, including facilities teams managing large premises, high-footfall buildings, production environments and exterior site maintenance…
Financial Health
HealthyHealthy · Growing, Hiring · 9% CAGR over 4y
Location
ASTUTE RECRUITMENT GROUP LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides recruitment and executive search services, placing candidates in finance, HR and office support roles. Works with employers and job seekers to source, screen and match professionals with…
Serves employers and jobseekers in finance, HR, executive search and office support, including businesses seeking permanent or interim staff and candidates looking for roles in these functions.
Financial Health
StableStable · -14% CAGR over 4y
Location
GERRELL & HARD LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides recruitment services for high technology and engineering sectors, sourcing and placing candidates in roles such as design engineering, data, manufacturing, and technical development for…
Serves high-technology and engineering employers, including startups, scale-ups, OEMs and manufacturers, plus technical candidates in design, development, manufacturing, data, aerospace and…
Financial Health
StableStable · -3% CAGR over 4y
Location
Bluefrog Cleaning Services Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides commercial cleaning and facilities support services for organisations, including office, retail and accommodation cleaning, bio-cleaning, and cleaning for venues, children’s centres, council…
Serves businesses and public-sector organisations across the South UK, including offices, retailers, accommodation providers, councils, children's centres, country parks, entertainment venues and…
Financial Health
StrongStrong · Hiring · 5% CAGR over 4y
Location
Executives In Sport Group Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides executive search and recruitment services for the sports industry, placing senior executives and specialist professionals in sports business and high‑performance roles. Also advises…
Serves B2B clients in the sports sector, including professional clubs, leagues, governing bodies, broadcasters and sports technology firms seeking senior business and high-performance leadership…
Financial Health
StrongStrong · Growing, Hiring · 13% CAGR over 3y
Location
H. MONFARED (BUILDERS) LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides commercial building and refurbishment services, including alterations and fit-outs for industrial, retail and other commercial premises. Delivers construction, renovation and project work…
Serves B2B customers in the south of the UK, primarily commercial property occupiers, industrial businesses and retail operators commissioning building alterations, refurbishments and related project…
Financial Health
StableStable · -15% CAGR over 4y
Location
Leaves Building & Maintenance Contractors Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides property construction, refurbishment and maintenance services including reactive repairs, building renovation, fit-out, groundworks, landscaping and heritage restoration for housing…
Serves housing providers, local authorities, commercial property clients, schools, universities, care and hospital operators, and government/public sector bodies across the South East, plus some…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 4y
Location
ARCHIMEDES METALS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsOperates a scrap yard and metal recycling service, purchasing and processing scrap metals such as copper, brass and lead from domestic, commercial and industrial sources. Provides scrap metal…
Serves homeowners, tradespeople, commercial and industrial businesses, and domestic enterprises across Portsmouth, Gosport and Hampshire with scrap metal from clearances, rewires, development and…
Financial Health
HealthyHealthy · Growing, Hiring · 9% CAGR over 2y
Location
Interpro Technology Solutions Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides managed IT support and consultancy for businesses, including network installation, server virtualisation, cybersecurity, cloud computing, Microsoft 365 management and backup services. Also…
Serves B2B organisations of all sizes in Portsmouth, Southampton, Fareham and Hampshire, including defence-sector clients, professional services firms and companies seeking an outsourced IT partner.
Financial Health
WeakWeak · 3% CAGR over 2y
Location
CCN COMMUNICATIONS LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides telecommunications and power utility contracting services, including civil engineering works, fibre optic cabling and splicing, and aerial network installation for network operators and…
Serves telecoms network operators and internet service providers, including fibre infrastructure clients such as CityFibre and Toob, across the South of England.
Financial Health
StableStable · Hiring · 34% CAGR over 4y
Location
WESTERMO DATA COMMUNICATIONS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and manufactures industrial data communication and networking equipment, including Ethernet switches, routers, gateways, wireless devices, media converters and fibre‑optic modems. Also…
Serves B2B industrial and infrastructure customers, including rail operators, energy utilities, maritime and offshore firms, water and wastewater organisations, and engineers responsible for…
Financial Health
WeakWeak · Hiring · 5% CAGR over 4y
Location
The West Group Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, manufactures and supplies miniature fluid control components for medical and life science applications, including check valves, filters, fittings, tubing and pumps, and provides custom…
Sells to businesses in medical and life sciences, from smaller organisations to large medical device manufacturers, needing miniature fluid control components and custom assemblies for applications…
Financial Health
HealthyHealthy · Profitable, Hiring · 6% CAGR over 4y
Location
CENTIEL UK LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns, supplies, installs and maintains uninterruptible power supply (UPS) systems for critical power applications. Offers modular and standalone UPS units, energy storage and monitoring software…
Serves UK businesses with critical power needs, especially data centres, colocation providers and facilities or engineering teams responsible for resilient IT and electrical infrastructure.
Financial Health
StrongStrong · Growing, Hiring · 2% CAGR over 5y
Location
LIGHTFOOT DEFENCE LIMITED
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDesigns, manufactures, installs and services refrigeration and air‑conditioning systems for aerospace, maritime and land applications. Also supplies spares, refrigerant reclamation services, and…
Serves B2B and public-sector buyers in defence, aerospace, maritime, land and offshore sectors, including UK and international prime contractors, commercial organisations, governmental defence…
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
Location
Southern Power Tools And Abrasives Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsSupplies professional power tools, hand tools, accessories and small plant to utilities, public sector and construction customers. Provides equipment packages with compliance documentation, along…
Serves trade and public-sector buyers including utilities, MOD, housing providers, blue light services, NHS, prisons, education, aviation/aerospace, local authorities, construction companies and…
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
Location
TIAA LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides business assurance and advisory services including internal and IT audits, cyber security assessments, anti-crime support, security management, HR investigations, and governance advice,…
Serves organisations in health, housing, local government, charities, education and emergency services, mainly public sector and not-for-profit bodies with governance, risk and compliance needs.
Financial Health
WeakWeak · -69% CAGR over 4y
Location
NORMCYBER LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides managed cyber security services including threat monitoring, managed detection and response, incident response, vulnerability management, email and cloud security, data protection,…
Serves businesses and organisations, with stated sector focus on financial services firms, industrial companies and housing associations; targets leadership, IT and security teams responsible for…
Financial Health
StrongStrong · Hiring · 27% CAGR over 4y
Location
HAVANT SHEET METAL COMPANY LIMITED (THE)
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides precision sheet metal fabrication services including design and planning, CNC punching, fibre laser cutting, folding and welding. Manufactures components and assemblies in steel, stainless…
Serves B2B clients across Hampshire and the South Coast, including defence, aerospace, marine, manufacturing, electronics, pharmaceutical, telecommunications, audio/media, health and safety, and…
Financial Health
HealthyHealthy · Hiring · 5% CAGR over 4y
Location
AN4 Group Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides procurement and sourcing services for aerospace, defence, aviation and public sector organisations, supplying approved equipment, components and technology from global manufacturers. Also…
Serves B2B and public sector buyers in defence, aerospace, aviation and industrial sectors, including global manufacturers, defence technology suppliers and organisations needing approved procurement…
Financial Health
HealthyHealthy · -6% CAGR over 2y
Location
Pure Communication Group Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides business telecommunications services including mobile phone contracts, hosted telephone systems, landlines and broadband connectivity. Offers tailored tariffs, device supply and account…
Serves businesses of varying sizes that need telecoms support, including teams purchasing mobile plans and devices, hosted phone systems, landlines and broadband connectivity for staff and customer…
Financial Health
StrongStrong · Growing, Hiring · 49% CAGR over 3y
Location
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How Portsmouth B2B companies work and how to sell to them
What they do
Portsmouth B2B firms usually earn through repeat commercial need rather than impulse purchase. Revenue is commonly tied to retainers, managed-service contracts, framework call-offs, licence fees, subscriptions, usage charges or project work with follow-on support. Some sell software or data-processing capacity; others package labour, equipment, logistics, finance administration, technical maintenance or specialist advice into an account-managed service. Pricing tends to reflect risk and continuity as much as unit cost: service levels, liability, response times, reporting duties and renewal terms often sit close to the commercial centre of the deal.
Who they sell to
Most sell to owner-managed firms, SMEs and mid-market buyers, with a smaller route into enterprise and public-sector procurement where credentials and service history carry more weight. Typical decision makers include managing directors, finance directors, operations leads, procurement managers, IT managers and compliance owners, depending on the service being bought. Lower-friction purchases may come through referrals, direct sales or repeat account expansion; larger deals tend to involve documented proposals, security reviews, supplier onboarding and negotiated terms. Sales cycles are usually measured in weeks or months, especially where the buyer is replacing an incumbent supplier.
What they buy
Most Portsmouth B2B firms tend to spend on systems and services that keep account management, delivery and compliance under control. Common categories include CRM, quoting and proposal tools, billing, finance systems, project management, service desks, cyber security, backup and recovery, cloud hosting, payroll, HR, recruitment, insurance, legal support and accountancy. Firms selling operational support may also buy fleet, facilities, telecoms, stock control, maintenance scheduling and field-service tooling. Marketing spend is often practical rather than brand-led: list building, email governance, website conversion, customer evidence, events and bid collateral tend to matter when sales are account-based.
Why and how to sell to them
B2B buyers in this market tend to evaluate suppliers when procurement demands become more formal, an incumbent underperforms, margins tighten, a new finance or operations lead reviews systems, or a bid requires clearer evidence of controls. Good outbound usually links the offer to a specific operating pressure: reducing tender admin, improving audit trails, shortening quote-to-cash, protecting customer data, cutting manual reconciliation or making service performance easier to evidence. Claims need to be grounded in references, implementation effort, risk allocation and switching plans. Generic productivity language is less persuasive than a clear path from current process to lower friction in renewal, delivery or compliance.
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 B2B companies are there in Portsmouth?
What counts as a B2B company in this list?
Which are the largest B2B companies in Portsmouth?
What do B2B companies in Portsmouth actually do?
How does Portsmouth B2B compare internationally?
How is this list built and how fresh is the data?
How big are the typical B2B companies in Portsmouth?
Are these mostly new or established B2B companies?
What SIC codes does this use?
What buying signals should I look for?
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