Due Diligence Services

EY-Parthenon provides financial, tax, commercial, operational, human resources, AI, IT, product and technology, sustainability, cyber, and transaction tax due diligence to help you make informed choices with confidence. Our insights uncover hidden value, highlight risks, and support long-term strategies—enabling you to move forward with clarity, strengthen decision-making, and drive sustainable growth.

What EY-Parthenon Due Diligence can do for you

Our Due Diligence Services provide a complete view of the factors that drive value, identify risks, and support confident decision-making. Explore our full range of services—financial, commercial, operational, human resources, artificial intelligence (AI), IT, product and technology, sustainability, cyber, and transaction tax—to see how each area contributes to stronger strategies, better deal structures, and sustainable growth. Click on each service to learn how our integrated, data-driven approach delivers actionable insights and helps you make informed decisions with clarity and confidence.


#1 Global M&A Accountant Advisor — EY-Parthenon, H1 2025

Mergermarket’s latest for top M&A transaction advisor by both deal value and volume globally, and across key markets including Australia, France, Germany, Singapore, UK and USA.

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The EY-Parthenon Due Diligence team

Our latest thinking

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Gain competitive advantage with valuable insights from 160+ corporate separations, including spin offs, carve outs, optimal timing, and value maximization.

How can your digital investment strategy reach higher returns?

The 2022 Digital Investment Index reveals that companies struggle with digital strategy and measuring returns on their technology investments. Read more.

Nine steps to setting up an M&A integration program

EY-Parthenon M&A integration methodology consists of crucial key steps to help enable value creation from transactions. Learn more.

How asset-light strategies and models can boost business growth

An EY survey of 1,000 C-suite executives found that using asset-light business models and strategies fueled growth and strengthened financial results. Learn more.

Nine essential qualities of an M&A integration leader

Appointing an M&A integration leader with traits and skills to manage complex integrations will help realize the full value of a transaction. Learn more.

Three ways to improve your forecasting and scenario planning

New forecasting and scenario planning methods based on sound data analysis help businesses meet changing customer demands due to pandemic. Read more.