Forensic and investigation services

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Our forensic and investigation services team will support you at every stage of your matter, in an investigative, advisory or testifying expert witness capacity.

Complex, high stakes fraud and integrity matters and commercial disputes require recognised and trusted professionals to deliver diverse solutions.

Ranked Band 1 Forensic Accountants by Chambers and Partners, our full-service practice includes dispute resolution, investigations, contentious valuations, competition and monitoring trustee, data analytics, corporate intelligence and corporate risk and assurance capabilities.

50+ times our UK disputes team have been expert witnesses including on claims worth multiple US$ billions

Top Ranked for Litigation Support in 2025 Chambers Rankings

150 markets worldwide where our team have local knowledge and sector expertise

Our forensic and investigation services

Whistleblowing and investigation support

Whistleblowing frameworks provide many benefits – find out how to build trust and manage risks in a confidential, cost-effective, robust way.

Litigation support

Industry-wide litigation support and investigation services for lawyers and law firms.

Forensic investigations and special situations

Do you need clarity in an uncertain situation? If you're accused of wrongdoing we can help you get the facts right.

Competition and monitoring services

Monitoring trustee services to competition, financial and regulatory bodies.

Corporate Intelligence

Corporate intelligence often involves cross-border complexities. Our experienced team can offer support.

Disputes advisory

Advising on quantum, accounting and financial issues in commercial disputes.

Forensic data analytics

Our forensic data analytics team are helping businesses sift the truth from their data. See how we can help your firm.

Financial crime

Supporting your fight against financial crime in an ever-changing environment

Whistleblowing and investigation support

Whistleblowing frameworks provide many benefits – find out how to build trust and manage risks in a confidential, cost-effective, robust way.

Corporate Intelligence

Corporate intelligence often involves cross-border complexities. Our experienced team can offer support.

Litigation support

Industry-wide litigation support and investigation services for lawyers and law firms.

Disputes advisory

Advising on quantum, accounting and financial issues in commercial disputes.

Forensic investigations and special situations

Do you need clarity in an uncertain situation? If you're accused of wrongdoing we can help you get the facts right.

Forensic data analytics

Our forensic data analytics team are helping businesses sift the truth from their data. See how we can help your firm.

Competition and monitoring services

Monitoring trustee services to competition, financial and regulatory bodies.

Financial crime

Supporting your fight against financial crime in an ever-changing environment

Get in touch

Steve Holt

Partner, lead of the Global Forensic Practice

Contact Steve Holt Learn more about Steve Holt

Why Grant Thornton

Where you have experienced financial loss, regulatory enforcement or are the subject of a legal claim, we will assist you to recover financially and operationally, providing you with the assurance you need to satisfy regulators, shareholders, executives and staff.

Our global forensic practice spans over 145+ countries, providing an international capability wherever you may need it, enhanced by local expertise.

You will get lean, senior and multidisciplinary teams that are outcome oriented. We find and use information to help inform your strategic decision-making.