North America - United States • Dispute resolution

Katten

More informationMore information

Katten has built a strong reputation in regulatory investigations, securities class and derivative cases, whether for high-growth businesses to Fortune 500 companies. Working from both Los Angeles and New York, seasoned litigator and chair or the securities litigation group Bruce Vanyo remains a key adviser to some of the firm’s largest corporate clients. The firm also has strong practitioners in Chicago, where Michael Diver, a former Enforcement Branch Chief of the SEC’s Chicago office, and Michael Lohnes are the key contacts. Christina Costley is a notable member of the LA team, and she worked closely with Vanyo on the defense of Natera, Inc, which faced allegations of making misleading statements in its public disclosures concerning the accuracy of its testing technology and its growth projections. Experienced litigator Kevin Broughel joined the firm in March 2024, in the firm's New York office.

Legal 500 Editorial commentary

Testimonials

Collated independently by Legal 500 research team.

  • 'Kevin Broughel stands out as a real expert on the judiciary in New York, particularly the bench in the Southern and Eastern Districts of NY.'

Key clients

  • Astra Space, Inc.
  • BMO Capital Markets Corp.,
  • Braxia Scientific Corp.
  • Brent Willis
  • Co-Diagnostics, Inc.
  • Coupa Software, Inc.
  • CSG BSH Partners III, LLC
  • Former officers of Frutarom Ltd.
  • Inotiv, Inc.
  • JMP Securities LLC
  • John Clendening (former director of Silicon Valley Bank)
  • Land O’ Frost
  • Lawrence Kaplan
  • Natera, Inc.
  • NextCure, Inc.
  • Officers of Lordstown Motors Corp.
  • RedRidge Finance Group, LLC, RedRidge Lenders Services, LLC (together, “RedRidge”); Randolph Abrahams
  • TD Ameritrade, Inc.
  • Truist Securities, Inc.
  • UBS Securities LLC,
  • Various financial institutions sued by Madoff Trustee
  • William Blair & Company, LLC

Work highlights

  • Won a major securities class action victory for the former CEO, CFO, VP-Finance and Manager of Emerging Markets of Frutarom Ltd., one of the world’s largest manufacturers of flavor and fragrance ingredients, by obtaining complete dismissal of the claims against them in the US District Court for the Southern District of New York, and then prevailing on appeal at the Second Circuit.
  • Representing Natera and certain current and former officers and directors in a securities class action lawsuit pending in the US District Court for the Western District of Texas. The lawsuit asserts claims under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and SEC Rule 10b-5 and Sections 11, 12(a)(2), and 15 of the Securities Act of 1933 based on alleged misleading statements made by Natera in its public disclosures concerning the accuracy of Natera’s testing technology and the company’s growth projections.
  • Obtained a major victory for Astra (an orbital space launch vehicle company based in Alameda, California) and certain of its officers and directors in a securities class action that was filed in the US District Court for the Northern District of California. The lawsuit asserted claims under Sections 10(b), 14(a), and 20(a) of the Securities Exchange Act based on alleged misleading statements made by Astra in its public disclosures, SEC filings, and a proxy statement concerning Astra’s addressable market and rocket payload capacity.

Lawyers

Hall of Fame

The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.

Bruce Vanyo

Hall of fameKatten

There is a reason Bruce Vanyo's peers call him the "dean of securities litigation." He has spent more than 40 years handling securities fraud and corporate governance lawsuits for clients such as Amarin Corporation, Amdocs, Inc., Angie's List, Boeing Company, Cree, Inc. and GW Pharmaceuticals — and succeeding on their behalf. Leading the firm's securities litigation and enforcement practice, Bruce represents clients across a number of industries, particularly technology and life sciences.Bruce has "defended more major securities cases than any other lawyer in America," as the National Association of Corporate Directors has said. He represents clients who are in the midst of high-profile, sensitive cases that demand a deft approach and swift resolution. He makes it a priority to stop these lawsuits at the earliest opportunity, and regularly achieves this outcome. Of the more than 60 securities class actions Bruce has resolved over the past two decades, he has obtained complete dismissal at or before the pleading stage in more than three-quarters of them.By resolving cases efficiently, Bruce minimizes distractions for his clients and allows them to focus on running their businesses. His approach also controls the potentially burdensome costs of litigation.A number of Bruce's victories have favorably influenced securities law for defendants. He recently earned the dismissal of an $800 million securities class action, for instance, that clarified and limited a company's disclosure requirements with regard to the FDA's drug approval process. When the technology industry was besieged by class actions, he was tapped to lead its securities litigation reform efforts, creating the pleading and safe harbor provisions of the Private Securities Litigation Reform Act of 1995.

Leading lawyers

Michael Diver

Michael Diver

Katten

Michael Diver has built a national practice advising public companies, financial services firms and individuals in securities litigation and regulatory investigations. In these high-stakes matters, Michael's past experience as a branch chief in the Enforcement Division of the Securities and Exchange Commission (SEC) gives him valuable perspective, and he has a long track record of achieving very favorable results for his clients. As an Enforcement Division branch chief, Michael managed a team of SEC enforcement attorneys in investigating and prosecuting securities law violations, including matters involving complex financial fraud, market manipulation, insider trading and violations of broker-dealer, investment adviser and investment company regulations. Applying his government experience in private practice, Michael represents public companies, financial institutions and their individual officers and directors in regulatory matters and civil litigation. With over 20 years of experience, Michael is adept at devising effective defense strategies to address legal risks across a broad spectrum of circumstances. He is often called upon to defend clients that are facing concurrent private actions and regulatory investigations, and to defend against claims involving complex legal or compliance issues. In addition to handling investigations and litigation, he also regularly advises clients in connection with corporate governance matters, shareholder claims, financial restatements, internal investigations and Financial Industry Regulatory Authority, Inc. (FINRA) and stock exchange inquiries.

Practice head

The lawyer(s) leading their teams.

Bruce Vanyo

Other key lawyers

Michael Diver, Christina Costley, Michael Lohnes, Kevin Broughel