Sustainability & Midmarket Investing

Calash advises on the merger of Arq and Advanced Emissions Solutions

Calash is pleased to announce that it has provided technical and commercial due diligence in relation to the merger of UK-based environmental technology company Arq and Advances Emissions Solutions (ADES).

Calash supports the Scottish National Investment Bank on its investment into Leap AI

Calash is pleased to announce that it provided commercial due diligence to the Scottish National Investment Bank on its investment into Leap AI, a low-cost industrial AI robotics company.

Calash supports OEG on its acquisition of OPS Wind

Calash is pleased to announce that it provided voice-of-the-customer support to OEG Offshore on its acquisition of Offshore Painting Services Limited (OPS Wind), a leading provider of specialist operations and maintenance (O&M) and training services to the offshore wind sector.

Calash advises Floreat on its Investment into Standard Gas

Calash is pleased to announce that it provided commercial due diligence to ICR, a Graphite Capital backed business, on Sky Futures, a leading provider of unmanned systems and robotic led inspections.

Calash advises Vespa Capital on its investment into Eserv

Calash is pleased to announce that it provided commercial due diligence to private equity investor Vespa Capital on its investment into Eserv, a leading provider of digital twin SaaS for complex industrial assets.

Calash advises Strada Partners on its investment into Elsyca

Calash is pleased to announce that it provided commercial due diligence support to Strada Partners on its majority shareholder investment into Elsyca, a European digital twin simulation software company focussed on predicting and preventing corrosion of critical oil and gas and other energy sector assets.

Calash supports BGF on its investment into Sulmara

Calash is pleased to announce that it provided commercial due diligence to BGF on its investment into Sulmara, an independent provider of survey and inspection services to the offshore wind and energy markets.

Transition opportunities grow as supply chain challenges come into focus

Environmental awareness has been hard-wired into the decision-making process of investment funds – climate risk will remain an investment risk for the foreseeable future – but there has been a sea-change in how this translates to energy transition capital deployment.

Hydrogen Market Outlook

Hydrogen’s role in the energy transition has received increasing attention over the past 24 months, principally due to its ability to decarbonise hard to abate sectors, such as steel production, and balance intermittent power generation from renewables.

Subsea Infrastructure Failure: Market Risks, Costs and Opportunities

Subsea cables are the unseen infrastructure powering 95% of global internet traffic and connecting the fast-growing web of offshore wind,

Calash advises Longacre on its exit of Taylor Hopkinson

Calash is pleased to announce that it provided vendor commercial due diligence to support Longacre Group on its sale of Taylor Hopkinson, a specialist recruitment partner for the renewable energy sector, to Dutch flexible workforce solutions provider Brunel International.

Calash supports SES Energy on its acquisition of Chemical Injection Utilities Ltd (CIU)

SURF’s UP: Navigating the subsea transition

May 2022: The subsea market is heavily exposed to the energy transition, with offshore wind increasingly providing new project work. However, telecoms, power, and even deep-sea mining, are other areas of potential diversification. But how best to gain exposure to these booming markets?

Private Equity, Divergent Demand Forecasts and the Energy Transition

Calash has brought together some of the most recent data, alongside its own insights into investment trends in the energy sector, to provide a view on the risks facing investors in the power and energy space.

Calash advises the Scottish National Investment Bank on its investment into Forrit

Calash is pleased to announce that it provided commercial due diligence to the Scottish National Investment Bank on its investment into Forrit, a software security specialist and developer of cloud-based content management system (CMS) software.

Calash supports Davidson Kempner on its Acquisition of Swire Energy Services (SES)

Calash advises EV Holdings on its sale to Enersol

Calash is pleased to announce that it provided vendor commercial due diligence to EV Holdings (EV), a leading global provider of vision-based diagnostics and analytics services for the oil and gas sector, in support of its sale to Enersol, a joint venture between ADNOC Drilling and Alpha Dhabi Holding.

Calash advises Averroes Capital on its acquisition of Glacier Energy

Calash is pleased to announce that it provided commercial due diligence support to Averroes Capital on its acquisition of Glacier Energy, a specialist provider of products, services and engineered solutions for renewable and conventional energy markets.

Calash advises ICR and Graphite Capital on its Investment into Sky Futures

Calash is pleased to announce that it provided commercial due diligence to ICR, a Graphite Capital backed business, on Sky Futures, a leading provider of unmanned systems and robotic led inspections.

Calash advises Foresight Group on its investment into FIS Chemicals

Calash is pleased to announce that it provided commercial due diligence to Foresight Group on FIS Chemicals, a leading chemical producer specialising in the formulation, manufacture, and distribution of chemical products across a range of industrial sectors, including oil and gas, renewables, marine, hospitality, and logistics.

Calash supports the Scottish National Investment Bank on its investment into Cyacomb

Calash is pleased to announce that it provided commercial and management due diligence to the Scottish National Investment Bank on its investment into Cyacomb, a digital forensics and online safety company.

Calash advises on the partial sale of Wood Thilsted

Calash is pleased to announce that it has provided vendor commercial due diligence services to the owners of Wood Thilsted, a global offshore wind engineering consultancy, which has successfully gained a minority investment from Inflexion, a leading mid-market private equity firm.

Calash supports STAR Capital on its acquisition of Subsea Technology & Rentals (STR)

Calash supports Nevis Capital on its investment into JWF Process Solutions

Calash is pleased to announce that it provided targeted due diligence support to Glasgow-based SME investor Nevis Capital on its investment into JWF Process Solutions, a global instrumentation supplier across the oil and gas, petrochemical, utility, healthcare and food and beverage sectors.

Calash advises Foresight Group on its investment into Quanta EPC

Calash is pleased to announce that it has provided commercial due diligence in relation to the investment by infrastructure and private equity investment manager Foresight Group on its investment into Quanta EPC Holdings Limited, a specialist provider of engineering and consultancy services to the energy sector, focused on improving UK energy security and supporting the energy transition from fossil fuels to renewable energy.

Environmental Due Diligence:
Mitigating Operational Risk

Environmental due diligence will identify gaps in environmental regulatory compliance and poor operational practices that are potentially harmful to people

Heat Networks: The Shift to a Regulated Infrastructure Asset Class

The UK heat network sector has reached a defining moment. As of 27 January 2026, Ofgem is formally the sector

Calash advises the Scottish National Investment Bank on its investment into Utopi

Calash is pleased to announce that it provided commercial due diligence to the Scottish National Investment Bank on its investment into Utopi, a leading real-estate data analytics platform.

Calash supports AF Gruppen on its acquisition of Claxton Engineering Services

Calash advises Acteon Group on receiving new private equity investment

Calash is pleased to announce that it provided vendor commercial due diligence to Acteon Group, an offshore energy infrastructure services business, in support of its sale to Buckthorn Partners and One Equity Partners (OEP).

Electric Vehicles: Electrification across transportation supply chains

Electric vehicles are becoming a normal part of our everyday lives, but the adoption of electrification technology across heavy transportation could take a different path to decarbonisation – how applicable is battery technology to larger vehicles? How quickly will electrification find adoption across freight and supply chains?

Voice of the Customer (VoC): Pinpointing Decision Making:

Gaining insight into your customers and the markets you cater to is crucial for making informed decisions that sustain loyalty

Market Segmentation:
Know Your Customers

No one knows your business as well as you but there is a limit to what a management team can

Calash supports Balmoral Comtec on its sale to Freudenberg Flow Technologies

Chemicals in the energy transition – a private investment opportunity or challenge?

The dividing line between the chemicals and energy sectors has always been thin. Energy aside, the fact is that many of our most used materials are made from hydrocarbons, and yet private equity interest remains wary of investment.

Calash expands in the EU and Central and Eastern Europe with new Sofia office

Calash has boosted its presence in Central Eastern Europe (CEE) with the opening of a new office in Sofia, Bulgaria, to meet growing demand in the region for professional advisory services.

Calash advises Souter Investments on its acquisition of Premier Hytemp

Calash is pleased to announce that it provided commercial due diligence support to Edinburgh-based investment fund Souter Investments on its acquisition of Premier Hytemp.

The Evolving Electricity Market: What Investors Need to Know About Renewables, Balancing, and Grid Flexibility

The UK’s electricity market is undergoing significant structural changes. We’re seeing a clear trend: balancing actions are increasingly required to

Offshore wind M&A heads towards reboot

The wind sector is in growth mode and stakeholders are fiercely competing to increase their slice of the pie but growing pains have emerged, casting a shadow on previously held assumptions around the commerciality of the sector.

Calash advises PTL on Stanley Oil & Gas acquisition

Calash is pleased to announce that it has provided commercial due diligence services to Pipeline Technique (PTL), an onshore and offshore infrastructure welding, coating, and fabrication services provider owned by Bluewater, on its acquisition of the oil and gas division of Stanley Black & Decker, the major international pipeline services and equipment company.

Calash advises PD&MS on its receiving investment from RSK Group

Calash is pleased to announce that it provided vendor commercial due diligence to Inflexion-backed PD&MS, a multi-disciplined engineering company, on its sale to sustainable solutions provider RSK Group.

CCUS: An energy transition crossover opportunity

In this Executive Insights, Calash explores the emerging CCUS market, its technical crossover with oil and gas, and how technology and service providers can gain exposure to the space.

Calash advises Chiltern Capital on its investment into Empteezy

Calash is pleased to announce that it has provided environmental and commercial due diligence to private equity investor Chiltern Capital on its investment into Empteezy, a designer, manufacturer and distributor of industrial safety products and solutions, focussed on environmental protection, spill prevention and EV battery storage.

Calash advises ASCO on receiving investment from Endless LLP

Calash is pleased to announce that it provided vendor commercial due diligence to ASCO, a global provider of multi-site integrated supply base operations to the energy industry, in support of its sale to UK-based private equity investor Endless LLP.

Voice of the Customer (VoC): Pinpointing Decision Making

Gaining insight into your customers and the markets you cater to is crucial for making informed decisions that sustain loyalty

The European Defence Market: A PE Opportunity

The defence sector has traditionally struggled to attract investment, often clashing with private equity mandates and rising ESG pressures. That

Calash advises LDC on its investment into Boston Energy

Calash is pleased to announce that it provided commercial due diligence to private equity investor LDC on its investment into Boston Energy, a technical services provider to the wind energy industry.

Calash supports Foresight on its investment into J+S Subsea

Calash is pleased to announce that it provided commercial due diligence to Foresight Group on its investment into J+S Subsea, a subsea engineering company specialising in the provision, repair and refurbishment of subsea control systems.

Calash advises WestBridge on its acquisition of GoBe

Calash is pleased to announce that it has provided commercial due diligence services to WestBridge, a leading UK small-cap private equity firm. WestBridge saw the opportunity to combine its existing investment in APEM with GoBe Consultants, an offshore wind planning and environmental consultancy.

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