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Sustainability H1 2025 Sector Review

Sustainability


Macro Summary: H1 2025

UK Performance

  • UK economy grew 0.7% in Q1 2025, led by services, manufacturing and strong household spending; exports surged ahead of tariff changes
  • Momentum slowed in Q2, with April GDP contracting 0.3% amid fiscal headwinds, labour market softness & global trade uncertainty

Global Growth Outlook

  • Revised downward: The World Bank and Morgan Stanley both project global GDP growth at 2.3–2.5% in 2025, down from 3.5% in 2024
  • Drivers of Slowdown:
    • Trade shocks from U.S. tariffs (10-25% baseline, with reciprocal rates up to 54% on Chinese goods) are disrupting global supply chains
    • Investment flows are weakening, particularly in developing economies reliant on export-led growth

Inflation & Monetary Policy

  • Tariff-driven cost pressures remain a near-term risk, especially in sectors like electronics, automotive, and pharmaceuticals
  • Policy divergence: While the BoE and ECB are cautiously easing, the Fed remains hawkish amid U.S. fiscal uncertainty and tariff-induced inflation
  • Globally, inflation is predicted to ease to ~4.2% in 2025, with advanced economies returning to target faster than emerging markets – will be interesting to see how this pans out once the US’s ‘reciprocal’ tariffs take effect in August

Sustainable Development & Inequality

  • SDG progress off track: According to the UN’s 2025 SDG Progress Report, none of the 17 goals are on course to be met by 2030
    • East and South Asia show the fastest progress, while conflict-affected and fiscally constrained nations are falling further behind
  • Fiscal space is a key constraint: Over half the world’s population lives in countries unable to invest adequately in SDG-aligned infrastructure

Data & AI Policy Changes

  • Data reform: New UK Data (Use and Access) Act 2025 (DUAA) law updates UK GDPR – requires revised privacy policies & Data Subject Access Request (DSAR) processes
  • AI & automation expands opportunities across businesses but increases compliance requirements & risks
  • Stricter cookie & direct marketing rules expected – prepare for consent changes
  • Cross-border data provides easier international transfers, but safeguards needed. Businesses need to monitor legislation in all jurisdictions in which they operate

Strategic Implications

  • For UK-based investors and advisors: The UK’s relative macro-stability, combined with its separation from EU trade policy, may position it as a safe harbour for international capital, particularly in ESG-aligned sectors
  • For legal and financial professionals: Expect heightened demand for cross-border structuring that navigates tariff regimes, and for due diligence on ESG compliance as sustainability reporting becomes a differentiator

Sources:

Forecasts for the UK economy – a comparison of independent forecasts (HM Treasury)

World Economic Situation and Prospects 2025 – Mid-Year Update (UN

https://www.gov.uk/guidance/data-use-and-access-act-2025-data-protection-and-privacy-changes)


UK M&A Overview

  • Modest increase in deal activity in the UK: PE and M&A volumes saw a slight year-on-year rise overall
  • Activity increased from Q1 to Q2, with momentum expected to accelerate through H2 2025
    • Boosted by rate cuts, dry powder pressure, strategic expansion, and valuation clarity
  • Manufacturing & Industrial led growth: driven by tech investment, rising demand, and pro-growth policies
  • Corporate buyers dominate: 62% of UK deals in H1, in line with the 2-year average of 63%
  • Private Equity rebalances: Strong performance in Q1 2024 initially signalled a change in the balance across M&A landscape
    • Activity is now tracking historic norms – buyout accounts for 31% of deals in H1 with remaining 7% being follow on Growth Capital deals

UK Deal Activity Year on Year

Sectors: Sustainability; Business Services; Software, Media & Technology; Manufacturing & Industrial; Healthcare & Education

Number of Transactions axis labels: 0, 100, 200, 300, 400, 500, 600, 700, 800, 900

Series: Q3 2023 – Q2 2024; Q3 2024 – Q2 2025

Source: Pitchbook


Public Market

Key Trends:

  • Sector-wide Q2 rebound highlights sustained investor confidence following earlier disruption from U.S. policy shifts (“drill baby drill”)
  • Fluctuations in Green Energy:
    • AFC Energy – AIM-listed hydrogen fuel cell player – experienced a valuation correction in March once it released its weaker financial performance and confirmed a £2.8m inventory write-off
      • Its near total collapse of top-line performance initially inflated its revenue multiple
      • This steadily climbed in Q2 after the company announced its new strategic direction
    • Meanwhile, Nasdaq-listed solar battery company, NeoVolta Inc, reported strong revenue growth in Q2
      • Its US-based assembly has proved to be an asset during tariff uncertainty
      • Revenue forecast to grow 200% YoY
  • Clean Tech & Green Energy multiples are strong compared to other verticals, although future valuation growth will be tied to profitability
    • Shareholders will begin to expect a return on their investments and multiples may face pressure without margin expansion
  • HCM multiples remained steady across H1:
    • Players provide essential functions like payroll and benefits administration and generally benefit from stable recurring revenue models
    • Relatively mature space which leads to fewer disruptive entrants and predictable growth trajectories
    • Strategic acquisitions instead drive growth, as larger players target customers and complementary tools to broaden product-offerings

H1 2025 Revenue Multiples

Dates: Jan-02-2025; Jan-14-2025; Jan-24-2025; Feb-05-2025; Feb-17-2025; Feb-27-2025; Feb-11-2025; Feb-21-2025; Apr-02-2025; Apr-14-2025; Apr-25-2025; May-07-2025; May-19-2025; May-29-2025; Jun-10-2025; Jun-20-2025

EV / Revenue axis labels: 0.00x, 0.50x, 1.00x, 1.50x, 2.00x, 2.50x, 3.00x

Series: AgTech; HCM; ESG & Sustainable Services; Green Energy; Clean Tech

Source: S&P 500 – CapIQ

Private Transactions – UK

Sustainability UK Deals by Subsector

Quarters: Q3 2024; Q4 2024; Q1 2025; Q2 2025

Number of Transactions axis labels: 0, 20, 40, 60, 80, 100

Series: AgTech; Clean Tech; HCM; ESG & Sustainable Services; Green Energy

Sustainability UK Deals by Type

Quarters: Q3 2024; Q4 2024; Q1 2025; Q2 2025

Number of Transactions axis labels: 0, 20, 40, 60, 80, 100

Series: Buyout/LBO; Merger/Acqusition; PE Growth/Expansion

Source: Pitchbook

  • Drop in deals in Sustainability in H1 2025 highlights that attitudes towards the space were tested by changing governments – US has strong influence on UK landscape
  • Players in ESG & Sustainability Services, Clean Tech and Green Energy will benefit from strong policy incentives
    • Helps de-risk investments and attract capital
  • In contrast, AgTech shows slower growth, likely due to less direct policy support, longer commercialisation timelines and friction from farmers slower to adopt new tools
  • Uptick in HCM deals reflects the increased market interest Polestar has seen over the last year
    • Highlights growing market recognition of social sustainability as a material driver of long-term value
    • Reinforced by evolving employee expectations around reward, recognition, and workplace culture

PE attitudes to Sustainability:

  • Firms continue to embed ESG deep into portfolio companies
  • Many have launched dedicated sustainable funds (e.g. Palatine & Bridges) and treat ESG as a core value driver, not just a compliance requirement
  • Growth equity incubates emerging innovations to capture future upside as rapid organic growth is possible
    • Driven by regulatory and end-consumer demand for sustainable practice

Active Investors & Acquirors

Consolidation across the Sector acquirors target fragmented early-stage markets to gain scale and streamline operations.

Active M&A scene in sustainable waste management as acquirors rely on inorganic growth.

Investor/Acquiror Add-on Sponsor Target Deal Date Deal Type Subsector
CIRCLR — GIVING WASTE A SECOND LIFE icon infrastructure Chambers Waste Management 31/03/2025 Buyout/LBO ESG & Sustainability Service
CIRCLR — GIVING WASTE A SECOND LIFE icon infrastructure Ellgia 22/04/2025 Buyout/LBO ESG & Sustainability Service
CIRCLR — GIVING WASTE A SECOND LIFE icon infrastructure Wilrose Environmental 01/05/2025 Buyout/LBO ESG & Sustainability Service
zellis Apax Partners, Ergo Partners Elementsuite 09/01/2025 Buyout/LBO Human Capital Management
UNSEEN Pelican Capital, ThinCats Shine Interview 17/03/2025 Buyout/LBO Human Capital Management
UNSEEN Pelican Capital, ThinCats Meet & Engage 17/06/2025 Buyout/LBO Human Capital Management
Org group Venturi (Human Capital Services) 13/05/2025 Merger/Acquisition Human Capital Management
Org group Enterprise Digital Resources 23/06/2025 Merger/Acquisition Human Capital Management
access Altaroc Partners, GIC Private, Hg, HgCapital Trust, TA Associates Management, The Access Group Eploy 27/06/2025 Buyout/LBO Human Capital Management
Diligent Ares Management, Blackstone, Blue Owl Capital, Clearlake Capital Group, Golub Capital, Insight Partners (New York), Morgan Stanley Private Credit, Norwest Venture Partners Vault Platform 22/05/2025 Buyout/LBO Human Capital Management
upvolt SolarKW 03/01/2025 Merger/Acquisition CleanTech
upvolt Deege Solar 30/04/2025 Merger/Acquisition CleanTech
upvolt OHM Energy 11/05/2025 Merger/Acquisition Green Energy

Source: Pitchbook


UK Deals in Sustainability

Company Name Deal Date Deal Size (£m) Post Value (£m) Deal Type Investor Subsector
Harmoney Energy Income Trust 25/03/2025 200 200 Merger/Acquisition Drax Group Clean Tech
Aegis Energy 20/01/2025 100 PE Growth/Expansion Quinbrook Infrastructure Partners Clean Tech
Rolls-Royce SMR Ltd 08/01/2025 85 1,185 PE Growth/Expansion Undisclosed Investor Clean Tech
Connected Kerb 29/01/2025 65 PE Growth/Expansion Aviva Investors Global Services, National Wealth Fund (United Kingdom) Clean Tech
Northern Energy Oil 10/03/2025 8.3 8.3 Merger/Acquisition NWF Group Clean Tech
CMO Group 09/06/2025 1.8 1.8 Merger/Acquisition Lords Group Trading Clean Tech
Advanced Blade Repair Services 17/04/2025 1 1.4 Merger/Acquisition Wind Asia Training Clean Tech
Advantage NRG 27/062025 15.7 15.7 Merger/Acquisition Hercules (Construction and Engineering) Human Capital Management
Copper Bay 09/04/2025 5.8 5.8 Merger/Acquisition Guardian Metals ESG & Sustainability Service
A&D Carbon Solutions 12/06/2025 2.8 2.8 Merger/Acquisition Earnz Green Energy

Download the Sustainability H1 2025 Sector Review


Frequently Asked Questions

What is happening in the UK Sustainability M&A market?

The report shows that while overall UK M&A activity strengthened during H1 2025, transaction volumes within the Sustainability sector moderated as investor sentiment responded to changing political priorities. Activity nevertheless remained strong across CleanTech, Green Energy, ESG & Sustainability Services and Human Capital Management.

Which sustainability sectors are attracting the most investment?

The report identifies continued investment across CleanTech, Green Energy, ESG & Sustainability Services and Human Capital Management. Climate technology investment increased during H1 2025, supported by government policy, sustainability reporting requirements and growing investor demand.

Are private equity firms investing in sustainability businesses?

Yes. The report notes that private equity firms continue to embed ESG considerations across portfolio companies, with many operating dedicated sustainability-focused investment funds. Growth equity also continues to support emerging sustainability technologies capable of delivering long-term organic growth.

What are the current valuation trends for sustainability companies?

The report highlights a recovery in public market valuations during the second quarter of 2025. CleanTech and Green Energy businesses continued to achieve comparatively strong revenue multiples, while Human Capital Management businesses maintained relatively stable valuations supported by recurring revenue models.

What are the key sustainability investment trends in 2025?

Key themes identified in the report include the introduction of UK Sustainability Reporting Standards, increased climate technology investment, continued government support for Clean Energy industries, growing demand for ESG expertise and ongoing investment into sustainability-focused technologies.

Who are the active investors and acquirers in the sustainability sector?

The report highlights active investors and acquirers operating across Sustainability, including Cirqlr, Zellis, Org Group, The Access Group, Diligent and UpVolt, alongside a range of completed transactions across CleanTech, Human Capital Management, ESG Services and Green Energy.

What do current market conditions mean for sustainability business owners?

The report suggests that although political and economic uncertainty has influenced transaction volumes, government policy, regulatory developments, sustainability reporting requirements and continued investor interest continue to support long-term opportunities across the UK sustainability market.

How can Polestar Corporate Finance help?

Polestar Corporate Finance advises founders, shareholders, management teams and investors operating across the Sustainability sector on company sales, acquisitions, fundraising, management buyouts, business valuations and wider strategic corporate finance matters.

By Annabel Whelan on 25/07/2025