Mr. Gkatzimas specializes in complex financial markets disputes related to trading, valuing, and investing in securities and portfolios across asset classes – including digital assets.

He is an expert on derivative securities, structured finance products, and alternative investments, including their unique regulatory considerations, market structure, transactions, and valuation practices. Mr. Gkatzimas has significant experience with benchmark-related matters and actively consults on financial industry considerations related to the fallback framework of interbank-offered rates (IBORs). Recent digital asset consulting engagements include analyses of market structure and regulatory issues in the emerging cryptocurrency ecosystem, including cryptocurrency exchanges, the trading of digital assets and their derivatives, and the evolution of initial coin offerings (ICOs).

Clients engage Mr. Gkatzimas in a wide range of finance-related issues. He consults on disputes involving private equity and venture capital investments, valuation of illiquid securities, credit instruments, swaps, options and bespoke derivatives, mergers and acquisitions, and securities class actions. In his expert analysis work, he frequently addresses transaction and valuation disputes involving large and complex datasets.

Mr. Gkatzimas has led experts and consulting teams through all stages of regulatory investigations, litigations, arbitrations, and mediations. His case work spans numerous industries and company types, including banking and financial institutions, financial services and investment management, pharmaceuticals, energy, and technology. Notable engagements include a series of reports for the International Swaps and Derivatives Association (ISDA) on IBOR fallback rates in derivative markets, the Department of Justice’s investigation of S&P rating practices for CDOs and their collateral, and JDS Uniphase Corporation Securities Litigation.

In addition to his consulting work, Mr. Gkatzimas is a member of the professional faculty at the Haas School of Business at UC Berkeley, where he teaches an undergraduate course on financial engineering.


Stanford University
MSc in Financial Mathematics

Haas School of Business at UC Berkeley
Master of Financial Engineering

St. John’s University
MBA in International Finance

Aristotelian University of Thessaloniki
BS in Pharmaceutical Sciences