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Infrastructure PE Companies in London: 90+ Active Firms (2026)
Infrastructure PE firms invest institutional capital into transport, energy, utilities and social-infrastructure assets, with bases in London.
Buying centres cluster around origination, financing and asset-management functions rather than conventional corporate software or services procurement. The primary counterparties are institutional asset owners, fund vehicles, concession-backed operators and infrastructure platforms, with sales cycles shaped by mandate fit, governance rights and long-horizon cash-flow assumptions. Engagements tend to sit at asset, platform or fund-advisory level rather than project-by-project consultancy. London bases are therefore often client-facing and transaction-led: small specialist teams combine sourcing, due diligence, debt structuring and post-acquisition oversight for transport, energy, utilities, digital infrastructure and social-infrastructure exposures.
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London has 91 actively trading infrastructure PE firms, a compact cohort by private-markets standards. Reported employment totals 414 people, which points to a labour-light model built around investment professionals, finance specialists and asset managers rather than large operating workforces. 6 firms report turnover above £5M, so the revenue distribution appears concentrated in a small upper band, with many firms functioning as advisory managers, general-partner vehicles or holding platforms. The London footprint matters because these businesses often serve UK and international infrastructure opportunities from the same headquarters or advisory office.
Market structure is activity-led. Fund advisers, investment managers and asset-holding platforms do not all carry the same obligations, especially where privately owned infrastructure sits alongside concession-backed assets. Diligence tends to extend beyond price and leverage into concession length, financing covenants, planning exposure, counterparty permissions and operational governance. That makes infrastructure PE less comparable with generalist buyout activity: asset control, public-service sensitivity and long-duration contractual cash flows sit close to the centre of underwriting.
Capital deployment appears likely to remain selective, with managers favouring assets where contractual income, debt capacity and governance rights can be assessed without relying on aggressive exit assumptions. Early-commercial managers may find fundraising harder where track records are thin, while established platforms tend to benefit from repeat mandates and specialist asset knowledge. Consolidation pressure has been visible across private markets more broadly, and infrastructure PE is likely to feel the same pull where smaller advisory teams lack distribution, reporting depth or succession capacity.
91
Active firms
2026
6
Above £5M
Reported revenue
18
Since 2022
Newer incorporations
Key facts
About 6% of the trading cohort reports turnover above £5M (6 of 91 firms) — the rest sits below that revenue band.
19% of the cohort was incorporated since 2022 (18 firms), so a sizeable share is in its first few filing cycles.
London bases put infrastructure PE teams close to pensions, insurers, banks and public-sector counterparties.
Transport, energy, utilities and social-infrastructure strategies usually involve long-life assets with public procurement or concession exposure.
Fund-management, asset-management and asset-holding structures often sit in separate corporate entities.
Partnership and fund-vehicle structures can make statutory company profiles look small relative to the assets they oversee.
Top London Infrastructure PE companies
Provides infrastructure investment management, raising and managing funds that invest in energy, transport, digital communications, utilities and social infrastructure projects, and overseeing…
Serves institutional investors and clients seeking infrastructure investment exposure, including those allocating capital to energy, digital, social, transport and utilities assets across core and…
Location
InfraRed Capital Partners
Manages investments in infrastructure assets for institutional investors, including energy and renewable power, communications, transport and social infrastructure. Involved in development, financing…
Serves institutional investors and investment clients seeking infrastructure exposure, including those allocating capital to energy, digital, social, transport and utility assets across a range of…
Location
InfraRed Capital Partners
Manages infrastructure investment funds and assets, investing in sectors such as renewable energy, digital networks, transport, utilities and social infrastructure. Provides asset management and…
Serves institutional investors and other capital allocators seeking exposure to infrastructure assets across energy, digital, social, transport and utilities sectors.
Location
InfraRed Capital Partners
Manages and invests in infrastructure assets for institutional investors, including energy, transport, communications, utilities and social infrastructure. Provides infrastructure development, asset…
Targets institutional and professional investors, fund clients and capital allocators seeking long-term exposure to infrastructure assets across energy transition, digital communications, social,…
Location
Emdc Solar
Provides infrastructure investment management, including sourcing, financing and managing assets across sectors such as energy, transport, digital and social infrastructure. Operates investment funds…
Serves institutional investors, public-sector bodies and private-sector organisations involved in infrastructure across energy, social, transport, logistics and digital sectors.
Location
Amber Infrastructure Group
Provides infrastructure investment management services, including originating, financing and managing infrastructure assets and funds. Invests across sectors such as energy, transport and logistics,…
Serves institutional investors, public-sector bodies and private-sector infrastructure counterparties seeking exposure to social, energy, transport, logistics and digital infrastructure assets.
Location
InfraRed Capital Partners
Provides infrastructure investment management, investing equity in energy, digital communications, social, transport and utility assets. Develops, finances and manages infrastructure projects and…
Serves institutional investors and clients seeking infrastructure exposure, including those allocating capital to energy, digital, social, transport and utilities assets across complementary risk…
Location
Manages and invests in infrastructure assets through dedicated funds, acquiring, developing and operating core infrastructure businesses. Focuses on building and managing portfolios of energy,…
Serves institutional investors and capital allocators seeking exposure to European infrastructure assets, particularly those interested in greenfield and brownfield strategies and long-term…
Location
Amber Infrastructure Group
Manages and advises infrastructure investment funds, sourcing, financing and overseeing infrastructure assets for public and private sector projects across sectors including energy, transport,…
Serves institutional investors, public-sector bodies and private-sector organisations involved in infrastructure, including social, energy, transport and logistics, digital and regeneration sectors.
Location
Amber Infrastructure Group
Sources, finances and manages infrastructure investments for public and private sector projects. Provides investment origination, fund management and asset management services, investing in sectors…
Serves institutional investors, public-sector bodies and private-sector organisations involved in long-term infrastructure across social, energy, transport, logistics and digital sectors.
Location
Amber Infrastructure
Manages and advises infrastructure investment funds, sourcing, financing and managing infrastructure assets for public and private sector clients. Invests across sectors including energy, transport…
Serves institutional investors, public-sector bodies and private-sector partners seeking exposure to long-term infrastructure across social, energy, transport, logistics and digital sectors.
Location
Provides infrastructure investment and asset management services, acquiring, developing and managing core infrastructure assets through greenfield and brownfield strategies, and building diversified…
Serves institutional investors seeking exposure to European infrastructure assets, including clients with long-term capital allocation and responsible investment requirements.
Location
InfraRed Capital Partners
Provides infrastructure investment and asset management services, raising and managing funds that invest in energy, communications, transport, utilities and social infrastructure projects, including…
Serves institutional investors and other capital allocators seeking infrastructure investment exposure across energy, digital communications, social, transport and utilities assets.
Location
InfraRed Capital Partners
Provides infrastructure investment and asset management services, investing institutional capital in sectors including renewable energy, utilities, transport, digital communications, and social…
Serves institutional and professional investors seeking long-term infrastructure investment strategies across energy transition, digital communications, social, transport and utilities assets.
Location
Amber Infrastructure
Provides infrastructure investment management, including investment origination, fund management and asset management. Invests in and manages projects across sectors such as energy, transport and…
Serves institutional investors, public-sector bodies and private-sector organisations involved in infrastructure, including social, energy, transport and logistics, and digital assets.
Location
Provides infrastructure investment management, raising and deploying capital into assets such as renewable energy, communications networks, transport, utilities and social infrastructure, and…
Serves institutional and professional investors seeking long-term exposure to infrastructure assets across energy, digital, social, transport and utilities sectors internationally.
Location
InfraRed Capital Partners
Manages investments in infrastructure assets including renewable energy, utilities, transport, digital and social infrastructure. Develops, finances and manages projects and operational assets on…
Serves institutional investors and clients seeking long-term infrastructure exposure across energy, digital, social, transport and utilities assets.
Location
Amber Infrastructure Group
Provides infrastructure investment and asset management services. Sources, finances and manages infrastructure assets for public and private sectors, and manages investment funds investing in energy,…
Serves institutional and public-sector investors, government bodies and private-sector counterparties seeking infrastructure investment and asset management across social, energy, transport,…
Location
InfraRed Capital Partners
Manages investments in infrastructure assets including energy, digital communications, transport, utilities, and social infrastructure. Engages in development, financing, construction oversight, and…
Serves institutional investors and clients seeking infrastructure exposure, including those investing in energy transition, digital, social, transport and utilities assets across varied risk profiles…
Location
CKH GAS Infrastructure
Manages and invests in infrastructure assets and funds, sourcing, financing and overseeing projects across sectors including energy, transport, digital and social infrastructure. Provides fund…
Serves institutional investors and public/private sector organisations involved in infrastructure across social, energy, transport, logistics and digital sectors.
Location
Infrared Capital Partners
Manages investments in infrastructure assets, focusing on energy transition, digital communications, transport, utilities and social infrastructure. Invests across development, construction and…
Serves institutional and professional investors seeking long-term infrastructure exposure, including clients allocating capital to energy transition, digital, social, transport and utilities assets.
Location
InfraRed Capital Partners
Manages infrastructure investments for institutional investors, focusing on energy, digital communications, transport, utilities, and social infrastructure. Involved in development, financing,…
Serves institutional investors and clients allocating capital to infrastructure, including pension funds, insurers, sovereign wealth and other professional investors seeking long-term exposure across…
Location
Invests in and manages a portfolio of social infrastructure assets, primarily public‑private partnership (PPP) concession projects. Provides investors access to long‑term infrastructure investments…
Targets institutional investors seeking long-term exposure to UK and European PPP and social infrastructure assets, and works with public-sector bodies and partners involved in essential community…
Location
Amber Infrastructure Group
Manages infrastructure investment funds and assets for public and private sector projects. Sources, finances and manages infrastructure investments across sectors including energy, transport and…
Serves institutional investors and public- and private-sector infrastructure counterparties. Targets organisations involved in social, energy, transport, logistics and digital infrastructure through…
Location
Infrastructure Investments Ofto 1
Manages and invests in infrastructure assets including energy, digital communications, transport, utilities and social infrastructure. Activities include financing, developing, constructing and…
Serves institutional investors and capital clients seeking infrastructure investment exposure across energy, digital, social, transport and utilities assets.
Location
InfraRed Capital Partners
Manages infrastructure investments and funds, financing and overseeing projects across energy, digital communications, transport, utilities and social infrastructure. Activities include originating,…
Serves institutional and professional investors seeking infrastructure exposure, including clients allocating capital to energy, digital, social, transport and utilities assets.
Location
InfraRed Capital Partners
Manages investments in infrastructure assets including renewable energy, transport, utilities, communications and social infrastructure. Provides infrastructure asset management, investment…
Serves institutional investors and other capital providers seeking long-term infrastructure investment exposure across energy transition, digital, social, transport and utilities sectors.
Location
InfraRed Capital Partners
Manages investments in infrastructure assets, including energy, transport, digital communications, utilities, and social infrastructure. Develops, finances, and oversees infrastructure projects and…
Serves institutional and professional investors seeking exposure to infrastructure assets, including energy transition, digital communications, social infrastructure, transport and utilities.
Location
Amber Infrastructure
Sources, finances and manages infrastructure investments for public and private sector projects. Provides fund management and asset management for infrastructure assets across sectors including…
Serves institutional investors, public-sector bodies and private-sector infrastructure stakeholders across social, energy, transport, logistics and digital infrastructure markets.
Location
InfraRed Capital Partners
Manages and invests in infrastructure assets and projects. Focuses on energy transition, digital communications, transport, utilities and social infrastructure, providing asset management,…
Serves institutional and professional investors seeking exposure to infrastructure assets, including energy transition, digital communications, social infrastructure, transport and utilities.
Location
Amber Infrastructure Group
Sources, finances and manages infrastructure investments for public and private sector clients. Provides investment origination, fund management and asset management across sectors including energy,…
Serves public and private sector organisations and infrastructure fund investors seeking exposure to social, energy, transport, logistics and digital infrastructure assets across international…
Location
Manages and invests in infrastructure assets for institutional investors. Acquires, develops and actively manages businesses in sectors such as energy, utilities, transport and digital infrastructure…
Serves institutional and professional investors seeking exposure to European infrastructure assets, including pension funds, insurers, sovereign wealth funds and other large-scale capital allocators.
Location
Amber Infrastructure Group
Provides infrastructure investment and asset management services, sourcing, financing and managing infrastructure projects and portfolios through investment funds across sectors including energy,…
Serves institutional investors and public/private sector bodies involved in infrastructure, including social, energy, transport, logistics and digital assets, across international markets.
Location
Arcus Infrastructure Partners
Provides infrastructure investment and asset management through private funds. Identifies, acquires, and manages mid‑market infrastructure assets, supporting operations and growth across sectors such…
Serves institutional investors seeking exposure to European mid-market infrastructure funds and assets, including sectors such as logistics, fibre networks, leasing, energy and transport…
Location
Amber Infrastructure
Manages and advises infrastructure investment funds. Sources, finances and manages infrastructure assets for public and private sector projects, investing in sectors such as energy, transport and…
Serves institutional investors, public-sector bodies and private-sector counterparties seeking infrastructure investment and asset management across social, energy, transport, logistics and digital…
Location
Amber Infrastructure Group
Manages and advises infrastructure investment funds and assets. Sources, finances and oversees investments in sectors including energy, transport and logistics, digital networks and social…
Serves institutional investors, public-sector bodies and private-sector infrastructure counterparties in social, energy, transport, logistics and digital infrastructure markets, with an international…
Location
Amber Infrastructure Group
Provides infrastructure investment management services, including sourcing, financing and managing infrastructure assets. Manages and advises investment funds investing in sectors such as energy,…
Serves institutional investors, public-sector bodies and private-sector partners seeking exposure to infrastructure assets, with counterparties across social, energy, transport and logistics, digital…
Location
Manages infrastructure investment funds for institutional investors. Sources, acquires and actively manages stakes in infrastructure businesses such as energy, utilities and transport, working with…
Serves institutional investors worldwide seeking infrastructure fund exposure, with a focus on mid-market critical infrastructure companies and their management teams.
Financial Health
Insufficient historyInsufficient history
Location
Atrato Onsite Energy Holdco
Sources, finances and manages infrastructure investments for public and private sector projects. Provides investment origination, fund management and asset management across sectors including energy,…
Serves institutional investors, public sector bodies and private sector organisations involved in infrastructure, including social, energy, transport, logistics and digital assets.
Location
Invests in and manages infrastructure assets and projects. Focuses on transportation, energy and utilities, telecommunications, and social infrastructure, including public‑private partnership…
Serves public-sector authorities and highly rated private-sector infrastructure clients seeking investment for PPP and PPP-like projects in transport, energy, utilities, telecoms and social…
Location
InfraRed Capital Partners
Acts as a general partner within an infrastructure investment management group, participating in the management of funds that invest in and manage infrastructure assets including energy, transport,…
Serves institutional investors and other clients seeking long-term infrastructure investment exposure across energy transition, digital communications, social, transport and utilities assets.
Location
InfraRed Capital Partners
Investment holding company within an infrastructure investment platform that invests in and manages infrastructure assets, including energy, digital communications, transport, utilities, and social…
Serves institutional investors and clients seeking long-term infrastructure investment exposure, including allocations to energy transition, digital communications, social, transport and utilities…
Location
InfraRed Capital Partners
Manages and invests in infrastructure assets on behalf of institutional investors, focusing on energy, digital communications, transport, utilities and social infrastructure. Involved in development,…
Serves institutional investors and clients seeking long-term exposure to infrastructure assets across energy, digital communications, social, transport and utilities sectors.
Location
Amber Infrastructure
Manages infrastructure investment funds and assets, sourcing, financing and overseeing projects across sectors including energy, transport, digital and social infrastructure. Provides fund management…
Serves institutional investors, public-sector bodies and private-sector infrastructure partners across social, energy, transport, logistics and digital sectors, including fund investors and…
Location
Road Infrastructure (ireland)
Manages and invests in infrastructure assets, including energy, digital, social, transport, and utility projects. Involved in early‑stage development, construction, and ongoing asset management,…
Serves institutional investors and other capital providers seeking long-term exposure to infrastructure assets across energy, digital, social, transport and utilities sectors.
Location
Amber Green Spruce 2
Provides infrastructure investment management, including sourcing, financing and asset management of infrastructure projects and funds. Invests across sectors such as energy, transport, digital…
Serves institutional investors, public bodies and private-sector partners seeking infrastructure investment exposure across social, energy, transport, logistics and digital assets internationally.
Location
Manages infrastructure investment funds and invests in infrastructure businesses. Provides asset management and strategic oversight to portfolio companies in sectors such as energy, utilities,…
Serves institutional investors seeking infrastructure fund exposure, alongside management teams of mid-market critical infrastructure companies in sectors such as renewable energy, utilities and…
Location
Amber Infrastructure Group
Provides infrastructure investment management, including sourcing, financing and managing infrastructure assets and funds. Invests across sectors such as energy, transport, digital and social…
Serves institutional investors, public-sector bodies and private-sector partners seeking long-term infrastructure exposure across social, energy, transport, logistics and digital sectors.
Location
Infracapital Greenfield Partners II Subholdings (sterling) GP
Manages and invests in infrastructure assets, acquiring, developing and operating portfolio companies in sectors such as energy, utilities, transport and digital infrastructure, and overseeing assets…
Serves institutional investors and professional clients allocating capital to European essential infrastructure assets, across greenfield and brownfield investment strategies.
Location
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How London Infrastructure PE companies work and how to sell to them
What they do
Infrastructure PE managers usually earn through management fees, carried interest, co-investment economics and, in some cases, advisory or monitoring fees attached to asset-holding vehicles. The commercial offer is not software or a packaged service; it is access to origination, underwriting, debt structuring and governance for long-duration real assets. Mandates are priced around committed capital, asset value, transaction work or retained advisory scope, with success measured through distributions, refinancing capacity and operating resilience. Engagements are therefore high-trust and low-volume, often tied to a fund, platform acquisition or asset-management programme rather than a repeatable monthly purchase.
Who they sell to
Their customers are usually institutional asset owners, fund-of-funds teams, family-office allocators, pension trustees, insurers, infrastructure operators and asset sellers with mandates in transport, energy, utilities, digital infrastructure or social infrastructure. Decision-makers tend to include CIOs, heads of infrastructure, investment committee members, CFOs, portfolio managers and, on asset-side transactions, boards or public-sector counterparties. Sales is usually direct and relationship-led, though fundraising and advisory mandates may be filtered through investment consultants, procurement teams or formal RFPs. Contract values are lumpy rather than transactional, and buying cycles can run through diligence, legal negotiation and committee approval before any mandate is awarded.
What they buy
Most London infrastructure PE firms tend to spend on tools and services that support origination, diligence, fund administration and post-acquisition control. Relevant categories include CRM and deal-flow systems, data rooms, financial modelling support, portfolio monitoring, valuation services, compliance workflows, investor reporting, cyber security, tax advice, audit, legal counsel, debt advisory, market research and recruitment for investment or asset-management roles. Asset-level owners may also need operational technology assessment, facilities advice and specialist engineering diligence, but head-office buyers usually care more about auditability, access control, version history and whether reporting can satisfy investment committees without adding manual work.
Why and how to sell to them
Buying intent often appears around fundraising, a new advisory mandate, an acquisition process, refinancing, a platform build-out, senior finance or investor-relations hiring, or the arrival of new reporting requirements from institutional investors. Pain points tend to sit in the gaps between lean teams and heavy diligence: repeatable reporting, covenant tracking, document control, consultant coordination and evidence that asset-level assumptions still hold after acquisition. Outbound angles work better when they map to those events. A generic efficiency pitch is likely to be ignored; a message tied to a live deal process, lender reporting, investor due diligence or portfolio governance has a clearer route to budget.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
Also in London
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