Transactions and Corporate Finance by EY-Parthenon

EY-Parthenon works with CEOs and business leaders to shape high-impact M&A strategy and corporate finance decisions. We help organizations evaluate growth opportunities, optimize portfolios, and execute deals with confidence—from strategic diligence and valuation through integration or separation.

Our senior advisors bring investor-grade insight, deep industry experience, and disciplined execution across every stage of the deal lifecycle. Backed by EY’s global network, we help leaders accelerate transformation and deliver measurable value.

Featured Thinking

Venture Debt: Driving Growth for Scaling Companies

Michael Armstrong 23 Dec 2025

Our Solutions
Reimagine your strategy and realize your transformation plans. Select a topic to see more.

M&A
Divestment
Corporate Finance
Infrastructure

M&A Advisory Services

Learn how EY-Parthenon M&A Advisory Services teams can help enable strategic growth through integrated M&As, joint ventures and alliances.

M&A Due Diligence Consulting

Learn how EY-Parthenon M&A Due Diligence Consulting teams can help your business identify value drivers, improve deal structures and mitigate risks.

M&A Integration Consulting

EY-Parthenon M&A Integration Consulting teams can help you integrate assets while preserving value, accelerating synergy realization and minimizing risk.

Transaction Tax, Law and Workforce Advisory Services

Our transaction tax, law and workforce team can help you transform your business and maximize the value of your transactions. Find out more.

Special Purpose Acquisition Companies (SPACs)

Our SPAC services provide independent capital markets perspectives to boards and management on all elements of deal preparation and execution. Learn more.

Supply Chain in M&A Integration and Divestments

Whether it’s an M&A integration or a divestment and separation, a transaction provides a unique opportunity to transform your supply chain. Learn more.

Divestment Strategy Consulting

Our divestiture services can help you with portfolio management to improve value from carve-out, spin-off or joint venture. Get in touch today.

M&A Due Diligence Consulting

Learn how EY-Parthenon M&A Due Diligence Consulting teams can help your business identify value drivers, improve deal structures and mitigate risks.

Transaction Tax, Law and Workforce Advisory Services

Our transaction tax, law and workforce team can help you transform your business and maximize the value of your transactions. Find out more.

Cybersecurity Due Diligence in M&A and Divestitures

Discover how our EY-Parthenon M&A cybersecurity teams can help identify vulnerabilities, quantify cyber risks, and manage cybersecurity throughout M&A.

Corporate Finance Consulting

Our Corporate Finance consultants leverage deep financial and capital markets experience to help CFOs drive sustainable value. Learn more.

Capital Allocation Services

Our capital allocation services team can help you objectively assess the alignment of your business strategy to your asset portfolio. Find out how.

Forecasting and Scenario Planning

Strategic Forecasting and Scenario Planning teams can help optimize your business to rapidly make strategic, operational and portfolio decisions.

Valuation, Modeling & Economics Services

Our Valuation, Modeling and Economics services guide you through valuation and business modeling implications to better understand the impact. Learn more.

Fairness Opinion Services

Learn how we can provide an independent fairness opinion to boards and shareholders for buy-side M&A, sell-side divestitures and related-party transactions.

Infrastructure advisory and consulting services

Our teams can help governments, regulators and private clients with infrastructure advisory and ESG support, aiding decisions and project development.

Strategic Case Studies

Aerial view of semi-truck on bridge

Divestment Strategy

How carve-outs positioned an automotive giant for future growth

Daimler AG navigated strategic divestments and back-office transformation with EY-Parthenon.

Read case study

Smiling young Asian woman grocery shopping online with mobile

How smart technology helped Fiserv accelerate M&A strategy

Multi-billion-dollar mergers are fraught with complexity, but smart digital platforms can accelerate your deal strategy from design to delivery.

Read case study

Quality Control Workers Examining Pills in Lab

How an acquisition helped Orifarm prepare a prescription for growth

EY-Parthenon teams help founder-run Orifarm, a Danish pharmaceuticals company, embark on the path to transformation.

Read case study

Aerial shot of wally fry walking in a field

Strategy & Transactions

How the right buyer helped a family grow global plant-based food production

Innovation in plant-based meat could have a major role in promoting healthier food alternatives and sustainable environmental practices.

Read case study

Our latest thinking

The EY-Parthenon Transactions and Corporate Finance team

Shane MacSweeney

EY Global Infrastructure Leader and EY-Parthenon Ireland Head of Strategy and Transactions

Commercial, financial and economic advisory services provider

Dublin, Ireland

Helena O’Dwyer

EY Ireland Partner; Head of Strategy EY-Parthenon

A strategy consultant. Focused on business transformation and cutting edge innovation for the now, next and beyond.

Dublin, Ireland

Simon MacAllister

Co-Head of Geopolitical Strategy. EY Ireland Strategy and Transactions Partner. Head of Valuation, Modelling and Economics

Dad and husband. Corporate finance professional. DIY bodger. Enthusiastic but only modestly talented hockey umpire and triathlete!

Dublin, Ireland

Luke Charleton

EY Ireland Turnaround, Restructuring and Insolvency Partner and Private Equity Sector Leader

Transactions leader across a range of disciplines and sectors.

Dublin, Ireland

Marcus Purcell

EY Ireland Strategy and Transactions Partner and Head of D&I

Leads Transaction Support team in Dublin and Partner Sponsor for Diversity & Inclusion. Has deep sector transaction experience that enables him to support clients navigate the risk of a Transaction

Dublin, Ireland

Ferga Kane

EY Ireland Infrastructure and Real Estate Sector Leader

Ferga focuses on clients in the infrastructure market, including Government; Public Sector Agencies and Semi-States; infrastructure financiers and infrastructure developers.

Dublin, Ireland

Ronan Murray

EY Ireland Partner Corporate Finance - Strategy and Transactions

Enjoy transactions, am an optimist, sports fanatic, a native of Kerry, President of Cork Chamber of Commerce, husband & Father to two daughters.

Dublin, Ireland

Grit Young

EY-Parthenon Partner and EY Ireland Technology, Media & Entertainment and Telecommunications Industry Leader

Empathic and analytical. Anything is possible.

Dublin, Ireland

Fergal McAleavey

EY Ireland Partner Corporate Finance - Strategy and Transactions

Deep sector transaction experience. Strategic advisor. Seasoned corporate financier and investor. Maker. Husband and proud father of four.

Dublin, Ireland

David Martin

EY Ireland Strategy & Transactions, Capital & Debt Advisory Partner

David is focused on finding solutions for his clients with a range of lenders from Banks to the ever-increasing Alternative Lenders in Ireland and the UK.

Dublin, Ireland

Andrew Dolliver

EY UK & Ireland Strategy and Transactions Partner

Strategic restructuring professional specialising in creditor and debtor advisory.

Belfast, United Kingdom

Alan O’Brien

EY Ireland Partner Strategy and Transactions and Aviation Finance Global Transactions Leader

Rugby coach, husband, proud father to 3 kids.

Dublin, Ireland

Isaac Mulholland

EY UKI Strategy and Transactions Partner

Trusted advisor, leader, husband, proud father of three.

Belfast, United Kingdom

Niall McCarthy

EY Ireland Partner; Head of Transaction Strategy and Execution EY-Parthenon

Leads Transaction Strategy and Execution team in Ireland. Focused on supporting our clients with the implementation of corporate finance transactions.

Dr. Loretta O’Sullivan

EY Ireland Chief Economist and Partner

Experienced economics professional. Art Deco and Art Nouveau design enthusiast.

Dublin, Ireland

Conor Gunn

EY Ireland Government and Infrastructure Partner

Corporate finance professional. Experience in providing financial consultancy services.

Dublin, Ireland

Alan Large

EY Ireland Strategy and Transactions Partner

Experienced cross-sector, cross-jurisdiction restructuring professional with formal and informal experience.

Dublin, Ireland

Our latest thinking

Geostrategic Analysis: December 2025 edition

Read the December 2025 Geostrategic Analysis for our take on geopolitical developments and the impact of these political risks on international business.

Oliver Jones + 1

Does today’s disruption provide the blueprint for tomorrow’s growth?

EY-Parthenon CEO Survey September 2025 reveals how leaders build confidence, resilience, and growth strategies amid disruption and transformation.

Andrea Guerzoni + 2

Transact to transform: How a human focus can unlock deal value

Transactions which have a bold vision, prioritize the workforce and set conditions to navigate hurdles are more likely to transform a business. Learn more.

Liz Fealy + 2

On the agenda (8)

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west

CEO agenda

Featured: Strategic foresight: How Irish CEOs are building for the long term

CFO Agenda

Featured: How CFOs in Ireland are charting a course for growth and expansion

Strategy by EY-Parthenon

Featured: Strategic foresight: How Irish CEOs are building for the long term

Business growth

Featured: Venture Debt: Driving Growth for Scaling Companies

Infrastructure

Featured: Is the equity case compelling for Irish housing

Digital Strategy

Featured: 5 questions to help you build a long-term AI strategy

Data and decision intelligence

Featured: Strategic foresight: How Irish CEOs are building for the long term

M&A Strategy and Services

Featured: Strategic foresight: How Irish CEOs are building for the long term

east

EY Financial Services Thought Gallery

Discover more information on EY’s Financial Services Strategy and Transactions offerings in Ireland.

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EY-Parthenon is a brand under which a number of EY member firms across the globe provide strategy consulting services.