Expert profile

Olesya Prantyuk

Principal

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Highlights

Chartered Certified Accountant.
Appointed as the named expert and shadow expert on a number of occasions, both in High Court litigation and commercial arbitrations.
Experienced in dealing with complex valuation and damages issues in post M&A disputes, investor-state and commercial disputes, and matrimonial disputes.
Involved in high-profile cases with values in excess of $5 billion.
Focused on emerging markets, including Central and Eastern Europe.
Trilingual in English, Russian and Ukrainian.

Services

Economic Damages | Forensic Accounting | Investigations

Industries

Financial Services | Aerospace & Defense | Technology, Media & Telecoms

Olesya works incredibly hard and delivers pitch-perfect reports. She is excellent and demonstrates an in-depth command of the details of the case. She is able to very quickly assess how new information affects or impacts her evidence.
Lexology Index - Arbitration

Expertise

Olesya Prantyuk is a Chartered Certified Accountant with over 15 years of experience in finance and accounting, including more than a decade of experience in disputes. She has been appointed as the named expert and shadow expert, and has assisted the named expert on more than 50 occasions in matters of forensic accounting and commercial damages.

Olesya has worked on matters in various forums, from litigations in the UK and Swiss courts, to investor-state and commercial arbitrations on behalf of claimants and defendants (LCIA, ICSID, ICC, SIAC, ADCCAC, SAC, AAA). Her high-profile cases include a freezing order application with values exceeding $2 billion and a valuation in the aerospace sector of over $5 billion. Olesya’s cases as the named expert cover space technology, TMT, financial services sector, and energy, with damages up to $60 million.

Olesya is a native Ukrainian and Russian speaker and has been involved in matters regarding assets in Central Europe, Eastern Europe, and the Middle East, and in particular, those related to high-net-worth individuals across the EMEA region. She has led fraud investigation matters and dealt with allegations of corruption, as well as matrimonial work. Olesya has worked on audit engagements involving financial institutions, power and utilities, transportation, and retail companies, regarding consolidations, transfer pricing, impairment testing, provisions and contingencies, and working capital analysis. She has also worked on cases involving records prepared under the IFRS, UK GAAP, US GAAP, as well as local Ukrainian and Russian accounting standards.

Professional recognition

Lexology Index

Arbitration

Background

Olesya’s experience in assessing damages covers a wide array of matters across the aerospace and defence, oil and gas, financial services, logistics, retail, mining, precious metals, agriculture, and energy sectors. She has a particular interest in aerospace and technology that has the capacity to improve the lives of people.

Olesya has completed an advanced professional award in expert witness evidence and is a fellow member of the Association of Chartered Certified Accountants. She is a member of the Young International Arbitration Group, the Young International Council for Commercial Arbitration, and Arbitral Women (AW).