Glenn K. Vanzura

Litigation & Dispute Resolution, Securities Litigation & Enforcement, Global Investigations & White Collar Defense

"Vanzura has given clutch performances in some of his firm’s biggest cases, ranging from complex securities litigation to white collar criminal defense. … With a background in economics, he cuts quickly to the heart of complicated business disputes and finds solutions for large corporations, directors and others."
The Recorder

Visión general

Glenn Vanzura is a co-leader of Mayer Brown’s Securities Litigation and Enforcement practice. He focuses his practice on securities litigation, complex business litigation, white collar criminal defense and internal corporate investigations.

Glenn has represented corporations, partners, directors, officers, employees and audit committees in a vast array of industries, including the biopharmaceutical, electric vehicle, semiconductor, medical service provider, crypto currency, traditional automotive, real estate, casino gaming, hotel, cannabis, smartphone application, entertainment, manufacturing and restaurant industries. He has also represented Am Law 100 law firms in legal malpractice and related matters and provided neutral party consultation to mediators in securities matters, particularly in respect of loss causation and damages issues.


  • Led the defense of companies, directors and officers in numerous shareholder class and derivative actions involving alleged securities law violations, including actions in federal and state courts, with exposures from the low millions to the billions of dollars.
  • Represented companies and individuals in connection with investigations and enforcement actions by the Securities and Exchange Commission.
  • Represented companies and individuals in connection with investigations and criminal prosecutions by the US Department of Justice, international prosecuting agencies, and state and local government agencies, including matters involving alleged violations of the federal mail fraud, wire fraud and honest services statutes; alleged insider trading; alleged trade secret theft and economic espionage; alleged stock options backdating and other alleged violations of the federal securities laws.


  • Featured as a "Benchmark – California Litigation Star" and "Litigation Star" (Securities)
  • Featured as a "Benchmark Litigation Star" in the16th edition of Benchmark Litigation 2023
  • Recognized in the 2021, 2022 and 2023 editions of The Best Lawyers in America© for his work in Securities Litigation
  • Honored in every year since 2020 by the Los Angeles Business Journal’s “LA500” as one of the “most influential, most powerful, and most impactful business professionals” in Los Angeles
  • Featured as a "Local Litigation Star" in Benchmark Litigation (2018-2019)
  • Selected by The Recorder in its inaugural list as one of only 50 "Lawyers on the Fast Track"
  • Named to the Southern California Rising Stars list in each year of eligibility from 2009 to 2015


  • Stanford Law School, JD, with distinction
  • University of California, Los Angeles, BA, Business Economics


  • California


  • US Court of Appeals for the Ninth Circuit
  • California Courts of Appeal