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Mr. Gkatzimas' primary focus is on the valuation of complex securities and portfolios for both commercial litigation and regulatory matters.

Mr. Gkatzimas has significant experience in a wide range of finance-related issues including securities class actions, mergers and acquisitions, initial and secondary offerings, structured finance transactions, alternative investments, and on matters related to portfolio performance and attribution. His primary focus is on the valuation of complex securities and portfolios for both commercial litigation and regulatory matters. In matters related to securities litigation, Mr. Gkatzimas has analyzed class certification, market efficiency, loss causation, and appropriate methodologies for calculating damages. He has consulted on several notable cases including JDS Uniphase Corporation Securities Litigation and In re Apollo Securities Litigation.

Mr. Gkatzimas’ casework has spanned a variety of industries including financial institutions, pharmaceuticals, energy, and technology. Mr. Gkatzimas has also consulted on numerous valuation cases involving complex securities such as mortgage-backed securities, exotic options, swaps, structured debt and equity products, convertible securities, and employee stock options.

Prior to joining Brattle, Mr. Gkatzimas was a principal at Finance Scholars Group. He previously worked as a senior manager at Cornerstone Research, as a manager at Credit Suisse/First Boston, and as an analyst at Bear Stearns Asset Management. He holds a M.Sc. in Financial Mathematics from Stanford University, a Master of Financial Engineering from the Haas School of Business at UC Berkeley, and an MBA in International Finance from St. John’s University. He has taught courses in financial engineering and investments, and is currently a lecturer at the Haas School of Business, where he teaches in the undergraduate program.

Publications
Article
ICOs: What are they and what does the future hold?
June 22, 2018
Published in Securities Regulation Daily

Brattle Principal Ioannis Gkatzimas and Senior Associate Sujay Dave have written an article on initial coin offerings (ICOs).

Publication
Target Date Funds: Economic, Regulatory And Legal Trends
December 08, 2017
Published in Law360
Report
Target Date Funds: Economic Regulatory, and Legal Trends
September 26, 2017
Published by The Brattle Group, Inc.

In the first of a series of papers examining key economic, regulatory, and legal issues related to target date funds (TDFs), Brattle experts Chris Laursen, Ioannis Gkatzimas, and Branko Jovanovic provide an overview of TDFs, report on significant market trends, and summarize recent related litigation.

Article
Securities Class Actions: Trading Models to Estimate Individual Investor Trading Activity and Aggregate Damages
May 2017
Published by The Brattle Group, Inc.
News & Events
June 22, 2018
Article by Brattle Economists Makes Sense of Initial Coin Offerings

Brattle Principal Ioannis Gkatzimas and Senior Associate Sujay Dave have written an article on initial coin offerings (ICOs) published in Securities Regulations Daily.

September 26, 2017
Brattle Experts Examine Target Date Funds in New Publication

In the first of a series of papers examining key economic, regulatory, and legal issues related to target date funds (TDFs), Brattle experts Chris Laursen, Ioannis Gkatzimas, and Branko Jovanovic provide an overview of TDFs, report on significant market trends, and summarize recent related litigation.

June 13, 2017
Brattle Consultants to Present on Case Studies in Securities Litigation at BASF CLE Event

Brattle Principals Torben Voetmann and Ioannis Gkatzimas, and Senior Associate Pavitra Kumar will present at the Bar Association of San Francisco (BASF) Securities Litigation Section’s Continuing Legal Education (CLE) event, “Case Studies in Securities Litigation: What Works After Halliburton,” taking place June 13, 2017 in San Francisco, CA and via webcast.

October 02, 2014
Rich Goldberg and Ioannis Gkatzimas to Present at DataLead 2014 Conference

Brattle principals Rich Goldberg and Ioannis Gkatzimas will be presenting at the upcoming DataLead 2014 Conference, taking place September 30 to October 2, 2014 in Berkeley, CA.

July 24, 2014
Securities and Commercial Litigation Expert Ioannis Gkatzimas Joins The Brattle Group

Securities and commercial litigation expert Ioannis Gkatzimas has joined the firm’s San Francisco office as a principal. Mr. Gkatzimas has significant experience in a wide range of finance and securities litigation matters.