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SaaS Companies in Reading: 500+ Active Firms (2026)
SaaS companies in Reading sell subscription-priced cloud applications to businesses, supported by the town’s Thames Valley tech labour market.
Buying centres in Reading tend to sit with finance, operations, technology and compliance teams, rather than a generic software buyer. The local mix usually includes finance and revenue operations tools, line-of-business workflow applications, customer operations software, security tooling and developer-facing infrastructure. Customers are mostly business, public-sector or regulated-industry buyers, with Thames Valley proximity useful for account management and hiring. Engagements are typically ongoing departmental or enterprise subscriptions, paired with implementation support, security review, service-level commitments and UK GDPR processor terms.
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Reading has 578 actively trading SaaS companies in this cohort, a town-level base that reflects its Thames Valley role as a sales, services and product hub. Only 18 sit above £5M of revenue, while 127 were incorporated since 2022, so the local picture is more long-tail than scale-up dense. Reported headcount across the cohort totals 1,844 people, giving the list a visible employment footprint rather than a purely company-count profile. The mix points to suppliers serving UK-wide customers from Reading, not just a local software market.
UK SaaS suppliers usually meet regulation through the activity they support rather than through a sector licence. Platforms handling personal data fall within ICO oversight, with UK GDPR and Data Protection Act obligations shaping processor terms, retention controls, breach processes and audit trails. Cloud dependence also gives market structure a competition angle: the CMA’s review of public cloud infrastructure found adverse effects on competition and pointed towards remedies for major infrastructure providers. That scrutiny sits upstream of Reading software suppliers, but it can affect hosting choice, switching risk and enterprise procurement questions.
The cohort appears weighted towards early-commercial and specialist products, with fewer scale-ups that have broken into large-account selling. That shape tends to favour partnership channels, implementation services and integration work around larger platforms, rather than pure self-serve expansion. Procurement has been getting more exacting as buyers ask for clearer evidence on security, privacy and service resilience. Consolidation is plausible where narrow workflow tools need distribution, but the Reading base also leaves room for founder-led suppliers serving regulated niches.
578
Active firms
2026
18
Above £5M revenue
Reading cohort
127
Incorporated since 2022
Recent formations
Key facts
About 3% of the trading cohort reports turnover above £5M (18 of 578 firms) — the rest sits below that revenue band.
21% of the cohort was incorporated since 2022 (127 firms), so a sizeable share is in its first few filing cycles.
UK SaaS suppliers are not licensed as a single sector; regulatory exposure usually comes through data protection, cyber security, consumer/contract law and sector-specific rules for regulated clients.
SaaS providers processing personal data need to account for UK GDPR and Data Protection Act 2018 obligations, with the ICO as the UK data-protection regulator.
Cloud-dependent SaaS is affected by competition scrutiny after the CMA closed its public-cloud infrastructure services case on 31 July 2025 and reported an adverse effect on competition.
The CMA recommended strategic-market-status investigations into the two largest cloud infrastructure providers, which points to infrastructure concentration rather than a SaaS-provider licensing regime.
The wider UK software market includes about 100,000 software companies, with SaaS described as one of the UK’s largest ICT markets.
Top Reading SaaS companies
Veeam Software
Develops data protection and backup software for cloud, virtual, physical and SaaS environments. Provides backup, recovery, replication and ransomware recovery tools, including services for Microsoft…
Serves enterprises, small businesses, service providers and public-sector organisations, targeting IT, security and executive teams in government, education, financial services, insurance and…
Location
Develops and provides cloud-based enterprise resource planning (ERP) software for organisations, including local government and higher education. Offers integrated applications for finance, HR and…
Serves public-sector and education organisations, particularly UK local councils and higher education institutions, with buyers including finance, HR, student services, asset management and IT…
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and supplies enterprise software for government and regulated organisations, including information governance, document and records management, planning and building assessment, regulatory…
Serves public sector organisations, especially local government and regulators, plus financial services firms such as wealth, banking and insurance providers seeking digital governance, compliance…
Financial Health
StableStable · Hiring · 2% CAGR over 4y
Location
Veeam
Develops data protection, backup, and recovery software for cloud, virtual, physical, and SaaS environments. Provides platforms and services for securing, replicating, and restoring data across…
Serves businesses of all sizes, service providers and public-sector organisations, especially IT and security teams in government, education, financial services, insurance and healthcare.
Location
FISCAL Technologies
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsProvides AI-based software for accounts payable risk management, analysing invoices, suppliers and transactions to detect fraud, duplicate payments and anomalies. Also offers recovery audits,…
Serves finance, audit and procurement teams in UK local government, NHS and private healthcare organisations, and corporate/business services firms, including retail chains and financial/currency…
Financial Health
StrongStrong · Hiring · 84% CAGR over 5y
Location
Fiscal Technologies
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops accounts payable risk management software that analyses invoices and supplier data to detect duplicate payments, fraud and anomalies. Provides automated statement reconciliation, supplier…
Serves finance, audit and procurement teams in UK local government, NHS and private healthcare, and corporate/business services organisations, including national retailers and international currency…
Financial Health
StableStable · Hiring · 3% CAGR over 4y
Location
Enghouse Interactive
Develops and supplies contact centre software for businesses and service providers, including cloud and on‑premise platforms for omnichannel communications, call handling, IVR, workforce management,…
Sells primarily to businesses and public sector organisations running contact centres, including financial services, healthcare, housing associations, local government, media, technology providers…
Location
Provides cloud-based HR software for managing employee records, payroll, recruitment, onboarding, learning management and benefits. Also offers eLearning content, HR analytics tools, outsourced…
Serves HR, payroll and learning teams in UK-based organisations, including care homes, charities, financial firms, law firms, manufacturers, media and communications businesses, professional services…
Location
Barracuda Networks
Develops and provides cybersecurity software and cloud services including email security, network firewalls, web application protection, data backup, and managed XDR. Products protect email,…
Serves businesses of all sizes, IT and security teams, and managed service providers needing cybersecurity across email, applications, networks and data, including small businesses and Microsoft 365…
Financial Health
Insufficient historyInsufficient history
Location
BRAND NUDGE LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides a retail analytics platform that tracks online pricing, promotions, search visibility, product content, and retail media across retailers. Supplies daily data and insights to support pricing…
Serves consumer goods brands, suppliers and retailers worldwide, targeting commercial, sales, revenue, category insight, eCommerce, marketing and quality teams involved in retail performance.
Financial Health
StrongStrong · Growing, Hiring · 98% CAGR over 3y
Location
SERVICEWARE SE UK LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops software for enterprise service management and IT financial management, including tools for workflow automation, knowledge management, and cost and performance management. Also provides…
Serves large enterprises and service organizations, targeting CIOs, CFOs, IT, finance, HR and customer service leaders responsible for enterprise services, IT finance, performance management and…
Financial Health
HealthyHealthy · Hiring · 4% CAGR over 3y
Location
Enghouse Networks
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsDevelops and supplies enterprise software and related services including contact centre platforms, video communications systems, network virtualisation solutions for telecoms and utilities, and…
Serves B2B and public-sector organizations in communications, media, utilities and defence, particularly network operators and infrastructure teams adopting 5G, cloud, IoT and AI-driven network…
Financial Health
StableStable · 0% CAGR over 5y
Location
Aspentech
Develops industrial software for process engineering, asset performance management and digital grid operations. Products support simulation, advanced process control, production planning and…
Serves large industrial and infrastructure organizations in chemicals, energy, utilities, mining, pharmaceuticals, food and beverage, pulp and paper, water/wastewater, EPC, transportation and…
Location
Develops and provides cloud-based human resources software for organisations, including HR management, payroll, recruitment, onboarding, learning management and employee benefits platforms. Also…
Serves HR, payroll and people teams in UK-based organisations, including care homes, charities, financial firms, law firms, manufacturers, media companies, professional services firms and schools.
Location
COGNITRAN LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops software and provides IT services for original equipment manufacturers focused on aftersales operations. Offers SaaS applications for diagnostics, service analytics, content management, and…
Serves global OEMs, particularly in automotive and engineering, with buyers involved in aftersales, diagnostics, service analytics, technical publications and digital transformation.
Financial Health
StrongStrong · Profitable · -1% CAGR over 2y
Location
VOSS Solutions
Develops software for managing unified communications and collaboration systems. The platform provides automation, analytics, monitoring, and administration tools for phone numbers, email, contact…
Sells to B2B and public sector organisations managing complex UC, collaboration and contact centre environments, especially enterprises, service providers and partners in banking, education,…
Location
Push Technology Limited
Trajectory
2y · 2020–NowFinancial sub-scores
Computed from 2 filingsDevelops and provides real-time publish/subscribe data streaming software that delivers low-latency updates to web, mobile and enterprise applications via WebSockets. Platform includes cloud and…
Sells to B2B technology teams and developers at data-driven organisations, especially in finance, gaming, transportation, IoT and enterprise software, that need real-time data delivery to web, mobile…
Financial Health
HealthyHealthy · Hiring · 30% CAGR over 1y
Location
FORBURY PROPERTIES LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops cloud-based software for commercial real estate valuation and financial modelling. Provides tools for property appraisals, cash flow modelling, investment analysis, transaction assessment,…
Serves commercial real estate investors, valuers, appraisers, investment managers and transaction advisors in the UK, US and APAC managing or analysing freehold and leasehold commercial property…
Financial Health
StableStable · -60% CAGR over 5y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops and provides cloud-based regulatory technology software for financial institutions. Platform supports transaction reporting, trade and communications surveillance, best execution monitoring,…
Sells to financial services firms in global capital markets, including asset and wealth managers, brokers, fund managers, hedge funds, investment banks and proprietary trading firms with regulatory…
Financial Health
HealthyHealthy
Location
Manhattan Associates
Develops and provides cloud-based software for retail and supply chain operations, including warehouse, transportation and order management systems, demand forecasting, inventory and fulfillment…
Serves B2B enterprise and mid-market organisations in retail, wholesale, consumer goods, food and beverage, grocery, manufacturing, medical and pharmaceutical, trucking and third-party logistics,…
Location
51 DEGREES MOBILE EXPERTS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides real-time data services and APIs that identify web and app users’ devices and network information. Offers device detection, IP intelligence, geolocation, and TAC data to help digital…
Serves B2B digital businesses, including ad tech firms, AI companies, brands, digital agencies, e-commerce operators, publishers, streaming TV providers, web platforms, mobile networks, and data and…
Financial Health
WeakWeak
Location
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProvides data management software and services for healthcare organisations, including waiting list management, cancer pathway tracking, capacity planning, and data validation. Also offers data…
Serves NHS healthcare organisations, including acute trusts, integrated care systems and community providers, targeting operational, data and patient pathway teams responsible for waiting lists,…
Financial Health
StableStable
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and provides web‑based intellectual property management software for trademark attorneys and brand owners. The platform manages IP portfolios, tracks trademark matters, synchronises global…
Serves trademark attorneys, IP law firms and in-house IP teams at brand-owning corporations that manage trade mark and broader intellectual property portfolios.
Financial Health
DistressedDistressed · -68% CAGR over 4y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides a software-as-a-service platform for retailers to manage dropshipping and curated marketplace operations. Software connects retailers with suppliers, synchronises inventory, manages product…
Serves B2B retailers and ecommerce organisations, particularly supply chain, category, dropship and online trading teams managing large product ranges and supplier networks.
Financial Health
StrongStrong · Hiring · 33% CAGR over 2y
Location
VWS Software Solutions Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops and supplies waste management and recycling industry software, including the PurGo ERP platform. Provides modules for skip hire, trade waste, weighbridge, tipper and roll‑on roll‑off…
Sells to B2B waste management and recycling operators, including trade waste firms, skip hire providers, tipper and roll-on/roll-off operators, waste brokers, and businesses using weighbridge-based…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
Fortinet
Develops and supplies cybersecurity software, appliances and cloud services for network, endpoint and cloud protection. Offers next‑generation firewalls, secure networking, SASE platforms, threat…
Sells to businesses, enterprises, public sector organisations and service providers needing cybersecurity across networks, cloud, endpoints and operational technology, including IT, security and…
Location
Aurum Solutions Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops financial reconciliation software that automates matching and verification of transactions. The platform imports financial data, applies configurable matching rules, generates reports and…
Targets CFOs, finance managers and financial operations teams in B2B sectors including banking, fintech, asset management, insurance, gambling, hospitality and payments, from startups to large…
Financial Health
StrongStrong · Growing, Hiring · 28% CAGR over 4y
Location
Provides data analytics, technology platforms, and contract research services for pharmaceutical, biotechnology, and healthcare organisations, including clinical trial management, real‑world health…
Serves life sciences and healthcare organisations, including pharmaceutical manufacturers, emerging biopharma, generics, MedTech and consumer health companies, plus payers, providers, government…
Location
Provides data analytics, technology platforms and contract research services to pharmaceutical, biotech and healthcare organisations, including clinical trial management, real‑world health data…
Serves life sciences and healthcare organizations, including pharmaceutical manufacturers, emerging biopharma, generics, MedTech, consumer health firms, payers, providers, government bodies, patient…
Location
Develops configure‑price‑quote (CPQ) and sales automation software for telecommunications and technology providers, enabling configuration of complex products and subscriptions, quote generation,…
Sells to B2B telecoms operators, communications providers and tech companies, particularly enterprises selling complex business solutions and subscription services at scale.
Location
Provides endpoint management and cybersecurity software that gives organisations real-time visibility and control over devices. Platform supports asset discovery, vulnerability monitoring, patch…
Sells to enterprise IT and security leaders in security-conscious organisations, including energy, financial services, healthcare, manufacturing, retail and technology firms, plus federal, state and…
Location
GCE CLIN SOLUTIONS LIMITED
Trajectory
3y · 2020–NowFinancial sub-scores
Computed from 3 filingsProvides data analytics, technology platforms, and contract research services to pharmaceutical and healthcare organisations, supporting clinical trials, real‑world evidence studies, regulatory…
Serves B2B and public-sector buyers in life sciences and healthcare, including pharmaceutical manufacturers, emerging biopharma, generics and MedTech firms, plus government, payers, providers,…
Financial Health
DistressedDistressed · -23% CAGR over 2y
Location
Integral Zone UK Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops DevSecOps software for MuleSoft environments, providing automated code review, security scanning, compliance checks, and API and platform monitoring tools that analyse MuleSoft projects,…
Sells to enterprise IT, integration and DevSecOps teams running MuleSoft projects, including Fortune 500 organisations and large regulated businesses needing secure, compliant API delivery.
Financial Health
DistressedDistressed · -24% CAGR over 4y
Location
Develops identity, payment, and data security software and hardware. Provides identity verification, identity and access management, PKI and cryptographic security platforms, hardware security…
Serves large enterprises and public-sector bodies, especially financial institutions, government agencies, healthcare providers and education organisations, plus partners targeting identity, payments…
Location
Provides data analytics, technology platforms, and contract research services for the life sciences and healthcare sectors, including clinical trial management, real‑world evidence studies,…
Serves life sciences and healthcare organisations, including pharmaceutical manufacturers, emerging biopharma, generics, MedTech, consumer health firms, payers, providers, government bodies and…
Location
Provides data analytics, technology platforms and contract research services for life sciences and healthcare organisations, including clinical trial management, real‑world health data analysis,…
Serves global life sciences and healthcare organisations, including pharmaceutical manufacturers, emerging biopharma, medtech, generics and consumer health companies, plus payers, providers,…
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops and publishes evidence‑based psychological therapy resources for mental health professionals, including worksheets, guides, scales, and audio materials. Provides an online platform for…
Serves B2B and education buyers in mental health: psychologists, counsellors, psychotherapists, students, clinical teams, and behavioural health organisations worldwide seeking evidence-based therapy…
Financial Health
StrongStrong · Hiring · 52% CAGR over 4y
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops cloud-based project and portfolio management (PPM) software that automates reporting, governance and portfolio oversight. Also provides PMO support and portfolio consulting services to help…
Serves business and public sector organisations with PMOs and delivery teams managing project portfolios, targeting portfolio leaders, sponsors and stakeholders overseeing multiple projects.
Financial Health
WeakWeak · -4% CAGR over 5y
Location
Provides data analytics, technology platforms and consulting services to pharmaceutical, biotechnology and healthcare organisations, including clinical trial management, real‑world health data…
Serves B2B and public-sector customers in life sciences and healthcare, including pharmaceutical manufacturers, emerging biopharma, generics, MedTech, consumer health firms, payers, providers,…
Location
Domino Data LAB
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsDevelops enterprise software platform for data science and machine learning that enables teams to build, train, deploy and monitor models, manage data science projects, and collaborate across tools,…
Serves large enterprises and public sector organisations with code-first data science, AI/ML, IT and governance teams, especially in life sciences and financial services.
Financial Health
WeakWeak · -10% CAGR over 1y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops applications for the Salesforce platform that support data management, including spreadsheet data import tools, address verification and standardisation, phone screening against TPS/CTPS…
Sells to businesses and organisations using Salesforce, from small teams to large enterprises, across sectors including higher education, financial services and nonprofits, particularly teams…
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
Location
Develops cloud-based elearning authoring software used by organisations to create, translate, and manage online training courses. Platform includes templates, AI content generation, analytics, and…
Serves B2B learning and development teams, training managers and subject-matter experts at large companies needing scalable employee, compliance, onboarding, product and sales training across LMS/LXP…
Location
Dialogic
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDevelops real-time communications software and network infrastructure products, including media servers, session border controllers, signaling controllers, media gateways, and IVR and voicemail…
Serves B2B telecom and communications markets, including mobile and fixed operators, enterprise solution providers, application developers, and enterprises needing real-time communications…
Financial Health
StableStable · 0% CAGR over 2y
Location
Courseloop UK Ltd
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsProvides curriculum management software for higher education institutions. Platform supports curriculum data management, governance workflows, curriculum mapping and review, publishing course…
Sells to higher education institutions, primarily universities, targeting academic administration, curriculum management, quality assurance, governance, marketing and student experience teams…
Financial Health
StableStable · Hiring · 74% CAGR over 1y
Location
Capture
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides web-based digital asset management software for organisations to store, organise, tag, search and distribute image and video files. The platform includes metadata management, automation…
Serves organisations managing large image and video libraries, including picture libraries, sports clubs, media/content teams and other businesses needing secure access, metadata and distribution for…
Financial Health
WeakWeak · -1% CAGR over 4y
Location
CloudFactory
Provides AI consulting and a platform for developing and operating machine learning systems, including data collection, labeling and annotation, dataset curation, model training and fine‑tuning,…
Serves enterprise AI, data science and product teams in healthcare, finance, embodied AI and damage assessment sectors, especially where production AI errors carry high risk.
Location
INTELLIGENT MOTORING LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides automotive aftersales services including vehicle warranties, insurance products and repair management. Operates a digital platform connecting car owners with garages and service providers,…
Serves UK and Irish car owners and B2B automotive partners, including car buying brands, leasing companies, dealers, insurers and garage networks seeking customer engagement and recurring aftersales…
Financial Health
HealthyHealthy
Location
Fullstory
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides a digital analytics platform that captures and analyses user interactions on websites and mobile apps. Offers session replay, product analytics, in‑app surveys, and AI‑driven insights to…
Serves B2B digital product, data, support, IT and marketing teams at retail/ecommerce, travel, gaming, SaaS, food and beverage, and financial services companies.
Financial Health
StrongStrong · Hiring · 91% CAGR over 4y
Location
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops and supplies technology‑enabled care systems that use in‑home sensors to monitor activity such as movement, door use, temperature and routines, providing real‑time alerts and data to…
Serves care providers, health and social care organisations, and families or unpaid carers responsible for vulnerable adults living independently at home, including those managing community care and…
Financial Health
StrongStrong
Location
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How Reading SaaS companies work and how to sell to them
What they do
Reading SaaS firms usually earn through recurring subscriptions, with pricing set per user, per account, by usage tier or by module. Many add onboarding, configuration, integration or managed support fees where the product sits inside finance, operations, customer service or regulated workflows. The product is normally cloud-delivered software, but the commercial package often looks like software plus assurance: uptime commitments, data-processing terms, audit support, migration help and training. Smaller suppliers tend to sell departmental tools with a narrow workflow or compliance need, while more mature firms bundle adjacent modules and account-management services to increase retention and expansion inside existing customers.
Who they sell to
Most sell to UK businesses, public-sector bodies or regulated-industry teams rather than consumers. Typical buyers include CFOs, finance operations managers, CTOs, heads of engineering, compliance leads, procurement teams and departmental operations owners. Contracting often starts with a problem owner, then widens to security, legal and finance before signature. Lower-value tools may move through self-serve trials or sales-assisted inbound, but larger accounts usually involve direct sales, security questionnaires, data-protection review and negotiated service terms. Partner-led routes also matter where Reading suppliers attach to larger implementation projects, managed services or sector-specific advisory work.
What they buy
Most Reading SaaS firms tend to spend on the systems and services needed to sell, deliver and evidence a subscription product. Common categories include CRM, marketing automation, billing, revenue recognition, customer support, product analytics, observability, identity management, security testing, cloud hosting, backup, incident management and data warehousing. They also buy legal advice for customer contracts and UK GDPR terms, accounting support for recurring revenue, recruitment for product and customer-facing roles, and outsourced marketing where founder-led teams need pipeline. Firms selling into regulated customers usually place extra weight on security documentation, audit readiness and integration support.
Why and how to sell to them
SaaS buyers in Reading tend to evaluate suppliers when growth exposes manual work in billing, onboarding, support, security reviews or reporting. Other triggers include a new enterprise sales push, a shift into public-sector procurement, leadership hiring, funding, cloud cost pressure or a customer requirement for tighter UK GDPR and cyber controls. Outbound works better when it maps to a specific operational bottleneck rather than a generic software-growth claim. Useful angles include reducing time spent on procurement questionnaires, shortening implementation cycles, improving renewal visibility, controlling infrastructure spend or giving sales and customer-success teams cleaner account evidence.
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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