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Renewable Energy Companies in Glasgow: 100+ Active Firms (2026)
Renewable energy companies in Glasgow develop, generate, store and support low-carbon power across the city region.
Buying centres sit around project development, asset operations, grid services, engineering support and energy supply rather than a single software-style buyer. Sales tend to run through commercial landlords, public bodies, utilities, infrastructure owners and energy-intensive businesses, with procurement shaped by technical assurance, site access, planning risk and power-market exposure. Engagements range from specialist advisory or engineering work to long-running operating contracts and supply arrangements, so the relevant buyer is often a mixed group spanning finance, estates, energy management and compliance rather than one departmental owner.
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Glasgow’s listed cohort contains 101 actively trading renewable-energy companies. Reported employment across the cohort totals 1,331 people, giving the sector a visible local labour footprint even though many operators remain specialist businesses rather than large employers. A revenue tail is also present: 21 firms report turnover above £5M, while 15 were incorporated since 2022. That mix points to a market with operating assets and established service providers alongside newer entrants trying to find space in project development, supply, grid support or technical services.
Licensing sits close to the business model for many firms. Ofgem’s framework covers companies generating, moving or supplying energy in Great Britain, with licence holders expected to meet standard and any special conditions attached to their activities. Legacy support schemes still matter operationally: the Renewables Obligation is closed to new generating capacity, but accredited stations remain subject to audit and compliance checks, including submission of generation information for Renewables Obligation Certificates. RenewableUK provides a trade-body channel for renewable-electricity firms, although it does not replace Ofgem’s formal role.
The Glasgow cohort appears split between asset-linked operators, engineering-led specialists and newer businesses testing grid, supply or project-development models. Procurement tends to favour firms that can handle compliance, technical delivery and counterparty risk, which may make it harder for early-commercial entrants to move from advisory work into owned or operated infrastructure. Consolidation has been more likely where portfolios, grid relationships or operations capability can be combined. Local demand should remain tied to public-sector decarbonisation, commercial energy costs and grid-connection constraints rather than a simple volume story.
101
Active firms
2026
21
£5M+ turnover
Glasgow firms
15
New since 2022
Recent incorporations
Key facts
About 20% of the trading cohort reports turnover above £5M (21 of 101 firms) — the rest sits below that revenue band.
14% of the cohort was incorporated since 2022 (15 firms), so a sizeable share is in its first few filing cycles.
UK renewables generated 50.8% of UK electricity in 2024, up from 46.4% in 2023.
Renewable output reached 144.7 TWh in 2024, up from 135.8 TWh in 2023.
Wind supplied 29.5% of UK electricity generation in 2024, split between 17.2% offshore wind and 12.3% onshore wind.
Ofgem licensing covers companies generating, moving or supplying energy in Great Britain, with standard and any special licence conditions applying once granted.
The IEA expects annual renewable capacity additions to rise from 666 GW in 2024 to almost 935 GW in 2030, with solar PV and wind forecast to account for 95% of additions.
Top Glasgow renewable energy companies
RWE Glasgow Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops, owns and operates energy generation assets including onshore and offshore wind farms, hydropower stations and biomass combined heat and power plants, and develops renewable energy, hydrogen…
Sells to B2B energy buyers, utilities, traders and corporate organisations seeking power purchase agreements for power generated from UK energy projects.
Financial Health
WeakWeak · Hiring · 5% CAGR over 4y
Location
European Energy
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 filingsDevelops, constructs and operates renewable energy projects, including onshore wind farms, ground-mounted solar farms, battery energy storage systems and Power‑to‑X facilities producing green…
Targets UK landowners and renewable-energy project partners, including agricultural landowners considering long-term land leases or sales for solar, wind, battery and Power-to-X sites.
Financial Health
StrongStrong · Hiring · 57% CAGR over 4y
Location
EMOTION ENERGY SOLAR ONE LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops, acquires, builds, and operates renewable energy projects, including solar, wind, and energy storage assets. Generates and supplies electricity to customers through a portfolio of…
Serves business and institutional energy buyers seeking direct renewable electricity supply across markets in Europe, the Americas and Asia.
Financial Health
StableStable · 0% CAGR over 4y
Location
Develops, constructs and manages renewable energy projects, including wind, solar and energy storage. Provides construction management, asset management, operations and maintenance, consultancy, and…
Serves renewable energy investors, project developers, asset owners and operators, landowners, utilities and communities involved in wind, solar, energy storage, transmission and green hydrogen…
Location
Moor Isles Farm Energy Storage
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops and operates battery energy storage projects linked to renewable energy infrastructure, storing electricity generated from sources such as solar and wind and supplying stored power to the…
Targets UK landowners who can lease or sell land for renewable energy projects, alongside project partners and local communities near solar, wind and battery storage developments.
Financial Health
DistressedDistressed
Location
Develops, owns and operates onshore wind farm assets as part of a renewable energy portfolio, generating electricity from wind and supporting the development, construction and operation of wind power…
Serves wholesale electricity buyers and grid-connected energy markets, with renewable power ultimately supplying homes and other energy users in the UK, Norway and Sweden.
Location
Develops, owns, and operates renewable energy generation projects, primarily onshore wind farms. Activities include planning, construction, and operation of wind energy facilities that generate…
Location
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops, constructs and operates onshore wind energy projects, including wind farms and related grid and infrastructure assets, as part of renewable electricity generation developments projects.
Financial Health
DistressedDistressed
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops, constructs and manages renewable energy projects, including wind, solar and energy storage. Provides asset management, operations and maintenance, consultancy, construction management, and…
Serves renewable energy investors, asset owners, landowners, utilities and local communities globally, across wind, solar, storage, transmission and green hydrogen markets.
Financial Health
DistressedDistressed
Location
Rothienorman Flexpower Ltd
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops, designs and delivers grid-scale battery energy storage systems. Provides project management, engineering integration, control system integration and software for battery optimisation and…
Serves B2B energy-sector customers, grid operators and landowners with suitable sites across the UK and Ireland, including parties involved in renewable power generation, electricity trading and…
Financial Health
WeakWeak · 0% CAGR over 3y
Location
Scottish Hydro Investment Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsOperates as an investment and holding company for energy infrastructure assets. Holds interests in electricity generation and energy network businesses, including wind, hydro and thermal power…
Serves a mix of B2B, public-sector and consumer energy markets, including electricity network users, energy traders, large energy users, households and communities in the UK and Ireland.
Financial Health
StableStable · Hiring · 41% CAGR over 4y
Location
Foster Turner Hydro Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops, constructs and operates hydroelectric power schemes and other renewable energy projects. Manages planning, optimisation and operation of small‑scale hydro installations and develops new…
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
Location
Trajectory
3y · 2019–NowFinancial sub-scores
Computed from 3 filingsDevelops energy and infrastructure projects including pumped storage hydro and battery energy storage systems to support electricity grid balancing. Also develops renewable‑powered data centres and…
Serves UK B2B infrastructure and energy markets, including electricity grid stakeholders, renewable energy investors, hyperscale data centre operators, and partners in net-zero residential…
Financial Health
StableStable
Location
Myreton Renewable Energy Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops large-scale battery energy storage system (BESS) projects that store electricity generated from renewable sources such as wind and solar and supply it to the grid during periods of low…
Targets energy infrastructure investors and UK electricity grid stakeholders, including transmission network operators, renewable power generators and energy market participants involved in…
Financial Health
HealthyHealthy
Location
Develops, owns and operates a wind farm generating renewable electricity for supply to the power grid, as part of a portfolio of utility‑scale renewable energy projects including wind, solar and…
Serves energy grids, with renewable power ultimately supplied to homes and businesses. Also targets partners and investors involved in large-scale renewable energy projects.
Location
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops, constructs and operates a utility‑scale solar photovoltaic farm generating renewable electricity, including associated infrastructure and potential battery storage, as part of a…
Targets landowners and project partners in the UK renewable energy market, particularly those involved in utility-scale solar, battery storage and onshore wind developments.
Financial Health
DistressedDistressed
Location
Develops, owns and operates a utility‑scale wind farm generating renewable electricity for the grid as part of a renewable energy investment portfolio, including the development, financing and…
Serves institutional investors, project partners and energy-market counterparties seeking large-scale renewable energy exposure, with output supplied to grids serving homes and businesses.
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsOwns and operates energy storage infrastructure, including battery energy storage systems connected to electricity networks, supporting the storage and dispatch of electricity from renewable sources…
Serves B2B clean energy investors, asset owners and developers, plus landowners and local communities involved in wind, solar, transmission and energy storage projects globally.
Financial Health
DistressedDistressed
Location
ENERGY IO LTD
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides engineering, project management and technical integration services for renewable energy and electrical infrastructure projects, including wind farms, battery storage systems and grid…
Serves B2B clients developing and delivering large-scale energy infrastructure, including major developers, EPC contractors, and UK distribution and transmission network operators in renewables and…
Financial Health
StrongStrong
Location
Blackhall & Powis Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides consultancy services for renewable and green energy infrastructure projects, including land referencing and GIS analysis, planning and development support, negotiation of land rights,…
Serves B2B renewable energy developers, utilities and infrastructure project teams delivering onshore and offshore wind, solar, hydrogen, marine and grid/network projects across the UK and…
Financial Health
StrongStrong · Growing, Hiring · 55% CAGR over 4y
Location
Green Cat Renewables
Provides renewable energy consultancy and development support services, including engineering design, environmental assessment, feasibility studies, grid and electrical services, and project…
Serves farmers and landowners, renewable energy portfolio developers, community groups, and investors/lenders involved in small and medium-scale wind, solar PV, hydro and associated infrastructure…
Location
Starlight Energy Operations UK LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops renewable energy projects, focusing on the origination, development and management of solar and other clean energy assets for investment and deployment, supporting the expansion of renewable…
Financial Health
StableStable · Hiring · 18% CAGR over 4y
Location
Reamp Consultancy Limited
Trajectory
1y · 2025–NowProvides consultancy services for renewable energy and energy infrastructure projects, including onshore and offshore wind, solar and battery storage. Advises on site identification, feasibility,…
Serves B2B clients developing and financing large-scale renewable energy and infrastructure projects, including onshore and offshore wind, solar, battery storage, pumped storage hydro, grid and data…
Financial Health
Insufficient historyInsufficient history
Location
Bradley Wind Energy 2
Provides renewable energy development and consultancy services, including engineering design, environmental impact assessment, planning support, grid and electrical design, feasibility studies, and…
Serves B2B and community-sector customers in renewable energy, including farmers and landowners, portfolio developers, community groups, and investors or lenders seeking support for small- and…
Location
Allt Na Moine Hydro Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsOperates a hydroelectric power generation scheme using a high‑head storage system and Pelton turbine, with installed capacity of about 2 MW and annual electricity production of roughly 10 GWh.
Financial Health
WeakWeak · 0% CAGR over 4y
Location
GLENFARNE VENTURES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops, acquires, owns and operates energy and infrastructure assets, including renewable power, grid stability and natural gas projects. Provides investment, development, construction oversight…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
Provides energy infrastructure, smart metering installation and asset management, and gas and electricity data services. Delivers energy management, demand flexibility, and project delivery services…
Sells to a mix of B2B and B2C customers, including energy suppliers, industrial and commercial businesses, public sector organisations, and domestic households, serving stakeholders across energy…
Location
Neilston Community Wind Farm
Operates a community wind farm through a joint venture project generating renewable electricity and distributing revenue to support local regeneration and community development programmes and…
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops passive electrical sensor network technology for high‑voltage power system monitoring and protection. Provides distributed sensing platforms used by utilities and renewable energy operators…
Sells to B2B and utility-sector customers in power grids and renewables, including transmission and distribution operators, digital substations teams, and operators of offshore wind and other…
Financial Health
StableStable · Hiring · 21% CAGR over 2y
Location
SMARTER GRID SOLUTIONS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops distributed energy resource management system (DERMS) software and provides consulting services for electricity utilities, distribution and transmission network operators, and energy asset…
Serves electricity utilities, transmission and distribution operators, DER developers, energy service companies, municipal authorities, C&I energy users, battery fleet operators and other energy…
Financial Health
StableStable · -60% CAGR over 4y
Location
ECO POWER INNOVATIONS LTD
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides design and installation of solar panel systems and battery storage for residential and commercial properties, including rooftop and ground‑mounted solar installations to generate electricity…
Sells to homeowners and businesses across Scotland’s Central Belt, with case studies spanning private households, schools and commercial firms.
Financial Health
WeakWeak · -11% CAGR over 2y
Location
JORRO LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsInstalls electric vehicle charge points for homes and workplaces, and designs and installs solar photovoltaic systems and battery storage. Also provides inspection, servicing and maintenance for…
Serves homeowners and businesses in Scotland seeking EV charging, solar PV, battery storage, and related maintenance, from domestic properties to workplaces and commercial sites.
Financial Health
HealthyHealthy · Hiring · 6% CAGR over 4y
Location
CLIR RENEWABLES UK LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops AI-based software for monitoring and analysing renewable energy assets. Platform aggregates operational data from wind, solar and battery storage portfolios to automate performance…
Serves renewable energy asset owners, asset managers, investment managers and infrastructure funds managing wind, solar and battery storage portfolios, including C-suite, in-house analysts and site…
Financial Health
StableStable · -25% CAGR over 2y
Location
MOOREAST UK CO LIMITED
Trajectory
3y · 2024–NowFinancial sub-scores
Computed from 3 filingsDesigns, engineers, fabricates and supplies mooring systems for offshore structures, including floating offshore wind and marine energy projects. Provides logistics, installation, commissioning and…
Serves B2B customers in the offshore energy and marine sectors, especially renewable energy developers and producers involved in floating offshore wind and other offshore structures in global markets.
Financial Health
WeakWeak · -18% CAGR over 2y
Location
Turner Iceni
Provides marine support services for offshore wind projects, operating a fleet of crew transfer vessels to transport technicians and equipment. Supports wind farm survey, construction, and operations…
Serves B2B customers in the offshore wind sector, including wind farm developers, operators and maintenance contractors needing crew transfer vessel and marine logistics support across project…
Location
Ecotech Contracts Ltd
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides multidisciplinary engineering and construction services, including renewable energy installations such as solar panels, battery storage, EV charging systems and wind turbine maintenance,…
Serves a mix of B2B and B2C customers: medium to large commercial and industrial organisations, property developers/builders, and homeowners across Scotland, the UK and Republic of Ireland.
Financial Health
DistressedDistressed · -21% CAGR over 2y
Location
GREENVERSITY LTD
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsSupplies and installs solar photovoltaic systems and battery storage for residential, commercial and industrial properties. Also installs ground‑mounted solar arrays, solar farms and air source heat…
Serves homeowners in Scotland and commercial, industrial and energy-farm clients across Scotland and the UK, including businesses with premises or land for solar projects.
Financial Health
StrongStrong · Hiring · 398% CAGR over 1y
Location
WESSEX SOLAR POWER LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops utility-scale solar farm projects across Britain. Works with landowners to identify sites, secure planning permission, and manage development of solar parks for renewable electricity…
Serves landowners in England and Wales with suitable sites for solar farms, alongside investors seeking participation in UK solar energy projects.
Financial Health
StableStable · -81% CAGR over 3y
Location
Scot Stability Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides technical and management consultancy to organisations in the energy, renewables and power generation sectors, including technical authority services, engineering project support, development…
Serves UK and international organisations in renewables, energy and power generation, including service providers, asset owners, regulatory bodies, and training and competence organisations updating…
Financial Health
WeakWeak · 0% CAGR over 4y
Location
SYNERGIE ENVIRON LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides low‑carbon engineering and consultancy services for energy and industrial sectors, including project development and execution for anaerobic digestion and biofuels, district energy networks,…
Serves B2B and public-sector clients in energy, oil and gas, food production, leisure, brewing, transport and local government, particularly organisations with industrial sites or heat and energy…
Financial Health
WeakWeak · -37% CAGR over 2y
Location
Noventa Energy (UK) Limited
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsDevelops and installs wastewater heat recovery systems that capture thermal energy from sewer networks to supply heating and cooling for buildings. Designs and delivers renewable energy…
Serves public authorities, healthcare and institutional campuses, commercial property owners, residential communities and industrial facilities pursuing wastewater energy projects, with emphasis on…
Financial Health
HealthyHealthy · Hiring · 100% CAGR over 1y
Location
LAPLACE CONTROL SYSTEMS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns and implements industrial process control and automation systems. Develops SCADA and PLC control networks, energy management and monitoring systems for wind farms and industrial facilities,…
Serves B2B industrial organisations, including process and discrete manufacturers, wind farm operators and energy distributors that need production process control, automation and energy management…
Financial Health
HealthyHealthy · -50% CAGR over 4y
Location
Urban Fox Holdings Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns, funds, installs and operates electric vehicle charging infrastructure, focusing on on‑street and car park chargepoints for local authorities. Manufactures retractable kerbside chargers and…
Sells primarily to local authorities, serving EV drivers—especially residents without driveways—as end users of on-street and car park charging networks.
Financial Health
DistressedDistressed · -11% CAGR over 2y
Location
NEO Environmental
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides planning and environmental consultancy services for energy, infrastructure, residential and commercial developments. Services include environmental impact assessment, ecology, hydrology,…
Serves B2B clients in the UK and Ireland, including energy developers, renewable energy operators, residential and mixed-use developers, retail, utilities, aggregates, quarrying and infrastructure…
Financial Health
StrongStrong · Hiring · 42% CAGR over 4y
Location
Cairn Risk Consulting Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides risk management consulting for the energy sector, advising developers, operators and technology providers on health and safety, asset integrity, and environmental and societal risks related…
Serves developers, owner-operators and technology providers in the energy transition, including sustainable energy generation, storage, transmission, transformation and consumption, plus oil and gas…
Financial Health
StrongStrong · Growing, Hiring · 82% CAGR over 2y
Location
BRB ELECTRICAL LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides renewable energy and electrical installation services for residential and commercial properties, including solar PV panels, air source heat pumps, battery storage systems, EV chargers, gas…
Serves homeowners, landlords, businesses and social housing providers in Central Scotland needing renewable energy, heating and electrical contractors for domestic, commercial and large-scale…
Financial Health
WeakWeak · -61% CAGR over 5y
Location
Big Battery (Aird Farm) Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsInstalls renewable energy and energy‑efficiency systems for residential, commercial and social housing properties, including solar PV panels, battery storage, air source heat pumps, and insulation…
Serves UK homeowners, tenants, businesses, commercial property owners and social housing providers, including private customers and qualifying benefit recipients accessing funded schemes.
Financial Health
StableStable
Location
Ohms Renewables UK Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsInstalls renewable energy and electrical systems for residential and commercial properties, including solar PV panels, battery storage, air source heat pumps, EV chargers and associated electrical…
Serves homeowners and businesses across Scotland and the UK, including domestic customers, commercial property owners and organisations involved in ECO4 projects seeking renewable energy and…
Financial Health
StableStable
Location
SANTANE LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides engineering and technology consulting services for energy and industrial sectors. Offers engineering design and drafting, HSE and risk consulting, energy transition support, digital twin and…
Serves B2B clients in high-hazard and regulated industries, including renewables/offshore wind, power and energy, oil and gas, refineries and petrochemicals, hydrogen, nuclear and defence, and food,…
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
Location
Katrick Technologies Wind Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDevelops and commercialises patented renewable energy technology, including wind panel systems that convert turbulent ground‑level wind and airflow from infrastructure and traffic into electricity…
Targets businesses and infrastructure operators in airports, ports, industrial estates, roadways, wind farms and transport, with potential residential customers seeking on-site renewable energy.
Financial Health
StableStable
Location
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How Glasgow renewable energy companies work and how to sell to them
What they do
Glasgow renewable-energy firms earn revenue from project origination fees, engineering studies, asset-management retainers, operations and maintenance contracts, electricity sales, grid-balancing services and supply margins. Some develop projects to sell once planning, land rights and grid connection are de-risked; others own or operate assets and recover returns over long periods through power sales or service contracts. Pricing is usually milestone-based for development work, day-rate or fixed-fee for technical services, and volume or availability-linked for generation, storage and flexibility activity. The commercial model therefore mixes professional-services discipline with infrastructure-style counterparty checks, insurance, warranties and performance guarantees.
Who they sell to
Most sell to property owners, councils, utilities, industrial sites, infrastructure funds, energy suppliers and large commercial estates rather than consumers. The buyer group typically includes finance directors, energy managers, heads of estates, sustainability leads, procurement teams, grid specialists and legal counsel. Sales cycles are rarely impulse-led: smaller assessments can move through direct sales, while asset, supply or operating contracts usually pass through tender, framework or RFP processes with technical due diligence. Procurement often asks for safety records, grid-connection evidence, licence status, metering approach, insurance cover and references from comparable sites.
What they buy
Most Glasgow renewable-energy firms tend to spend on project finance advice, land and planning support, grid-connection consultancy, legal services, insurance brokerage, metering equipment, control systems, monitoring platforms, cybersecurity, asset-management software, billing, CRM, accounting, HR, fleet and field-service tools. Engineering-led teams also buy recruitment support for electrical, civil, commercial and regulatory roles, alongside outsourced marketing for tender packs and public-sector bids. Cloud hosting and data analytics are relevant where firms monitor assets or forecast output, but sellers should expect technical validation rather than a generic software conversation.
Why and how to sell to them
Renewable-energy buyers tend to evaluate suppliers when grid queues delay projects, revenue exposure changes, asset portfolios expand, new licence obligations bite, or a funding or acquisition process forces more complete reporting. Leadership hires in operations, finance or commercial development can also reset tooling and supplier choices. Outbound works better when it links a specific cost or risk to an operating metric: fewer site visits, faster bid preparation, lower compliance overhead, better availability reporting, shorter debtor cycles, or clearer audit trails. Generic decarbonisation language is less persuasive than evidence that a supplier understands planning, connection, safety and contract risk.
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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