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Matthew L. Mustokoff

Partner

D  484.270.1456
F  610.667.7056

Matthew L. Mustokoff is a nationally recognized securities litigator.  He has argued and tried numerous high-profile cases in federal courts throughout the country in fields as diverse as securities fraud, corporate takeovers, antitrust, and unfair trade practices.

Matt is currently litigating several nationwide securities cases on behalf of U.S. and overseas investors.  Matt serves as lead counsel for shareholders in Sjunde AP-Fonden v. The Goldman Sachs Group (S.D.N.Y.), a fraud suit implicating Goldman Sachs’ pivotal role in the 1Malaysia Development Berhad (1MDB) money laundering scandal, one of the largest financial frauds involving a Wall Street firm in recent memory.  He also leads the firm’s team in In re Nvidia Securities Litigation (N.D. Cal.), a fraud case alleging that Nvidia misled the market about its reliance on highly volatile cryptocurrency mining sales prior to the crypto crash of 2018. Matt spearheaded the investigation and preparation of the complaint against Nvidia which was upheld by the U.S. Supreme Court when it dismissed Nvidia’s appeal as improvidently granted.

Matt recently led the team that secured a $239 million recovery in In re Celgene Securities Litigation (D.N.J.), involving allegations that drugmaker Celgene fraudulently concealed clinical problems with a developmental drug.  He also served as lead counsel for plaintiffs in In re Allergan Generic Drug Pricing Securities Litigation (D.N.J.), arising out of the industrywide price-fixing scheme in the generic drug market.  The $130 million recovery marked the first settlement of a federal securities case alleging concealment of the conspiracy which is believed to be the largest pharmaceutical cartel in U.S. history.

Matt played a major role in prosecuting In re Citigroup Bond Litigation (S.D.N.Y.), involving allegations that Citigroup concealed its exposure to subprime mortgage debt on the eve of the 2008 financial crisis.  The $730 million settlement marks the second largest-ever recovery in a 1933 Securities Act class action brought on behalf of corporate bondholders.  Matt represented the class in In re Pfizer Securities Litigation (S.D.N.Y.), alleging that Pfizer covered up adverse clinical results for its pain drugs Celebrex and Bextra.  The case settled for $486 million following a victory at the Second Circuit Court of Appeals reversing the district court’s dismissal of the action on the eve of trial.  Matt also served as class counsel in In re JPMorgan Chase Securities Litigation (S.D.N.Y.), arising out of the 2012 “London Whale” derivatives trading scandal. The case resulted in a $150 million recovery.

In addition to his class action practice, Matt has represented institutional investors as opt-out plaintiffs in some of the largest securities litigations of the last twenty years.  Matt served as lead counsel to several prominent mutual funds in In re Petrobras Securities Litigation (S.D.N.Y.), a fraud case against Brazil’s state-run oil company, Petrobras, involving a decade-long bid-rigging scheme, the largest corruption scandal in Brazil’s history.  He successfully resolved all claims as part of a $353 million reported settlement.  In Connecticut Retirement Plans & Trust Funds v. BP plc (S.D. Tex.), a multi-district litigation stemming from the 2010 Deepwater Horizon oil-rig explosion in the Gulf of Mexico, Matt successfully argued the opposition to BP’s motion to dismiss and obtained a landmark decision sustaining fraud claims under English law for investors on the London Stock Exchange—the first in a U.S. court.

Beyond his securities litigation work, Matt has prosecuted some of the firm’s largest consumer fraud cases.  He achieved a $100 million settlement for a class of internet advertisers in Cabrera v. Google (N.D. Cal.), a case involving an overcharging scheme directed at users of Google’s online advertising platform.  Matt led the team through twelve years of litigation, and the case settled just weeks before trial.  This is believed to be the largest settlement of a deceptive sales practice claim under California’s Unfair Competition Law alleging manipulation of online ad auctions.

A frequent speaker and writer on securities law and litigation, Matt’s publications have been cited by federal circuit and district courts, and in more than 75 law review articles and treatises.  He has published in the Rutgers University Law Review, Maine Law Review, Temple Political & Civil Rights Law Review, Hastings Business Law Journal, Securities Regulation Law Journal, Review of Securities & Commodities Regulation, and The Federal Lawyer, among others.  He has been a featured panelist at the American Bar Association’s Section of Litigation Annual Conference and NERA Economic Consulting’s Securities and Finance Seminar.  Since 2010, Matt has served as the Co-Chair of the ABA Subcommittee on Securities Class Actions.

Matt is a Phi Beta Kappa honors graduate of Wesleyan University.  He received his law degree from the Temple University School of Law.

Community Involvement

  • American Bar Association Subcommittee on Securities Class Actions, Co-Chair (2010-present)
  • Institute for Law and Economic Policy, Vice President (2023-present)
  • Public Interest Law Center of Philadelphia, Board of Directors (2024-present)
  • Wesleyan Lawyers Association (2020-present)

Speaking Engagements

Matt has lectured and appeared on speaking panels in the United States and Europe on a variety of topics, including corporate governance, class certification and damages in securities cases, opt-out shareholder litigation, and securities enforcement trends. These engagements include:

  • “When the Supreme Court Comes Off the Sidelines and Enters the Fray,” Institutional Investors Forum, Washington D.C., October 7, 2021
  • “The Generic Drug Price-Fixing Scandal: Criminal Investigations and Parallel Antitrust and Securities Litigation,” 2021 Litigation & Governance Trends for Asset Management Firms Annual Conference, Virtual, March 9, 2021
  • “The Proliferation of Shareholder Opt-Out Litigation: Prosecuting, Defending, and Settling Direct Actions After ANZ Securities,” 2018 American Bar Association Section of Litigation Annual Conference, San Diego, CA, May 3, 2018
  • “Opting Out of the Petrobras Class Action,” Institutional Investors Forum, Washington D.C., October 27, 2016
  • “Recent Developments in Securities Class Actions: Class Certification After Halliburton II,” NERA Economic Consulting’s 16th Securities and Finance Summer Seminar, Park City, Utah, July 4, 2016
  • “The Petrobras Litigation: A Case Study in Political Scandal, Cartelism and Financial Fraud,” The Rights and Responsibilities of Institutional Investors Conference, Amsterdam, The Netherlands, March 10, 2016
  • “Are the Courtroom Doors Closing to U.S. Investors? Erosions in Shareholders’ Rights and What Investors Can Do to Reverse the Trend,” Fifth Annual Evolving Fiduciary Obligations of Pension Plans Seminar, Washington, D.C., February 18, 2014
  • “Delaware Deal Litigation: The Plaintiff’s Perspective,” Benjamin Cardozo School of Law, Corporate Governance Seminar, New York, December 7, 2010
  • “Conducting Internal Investigations and Making Voluntary Disclosures: Is it Worth the Risk?,” 2010 American Bar Association Section of Litigation Annual Conference, New York, April 22, 2010

Awards/Rankings

  • Benchmark Litigation Star, 2020-2025
  • Lawdragon 500 Leading Plaintiff Financial Lawyer, 2019-2026

Education

  • Wesleyan University
    B.A. 1997, Phi Beta Kappa
  • Temple University Beasley School of Law
    J.D. 2000, Articles editor of the Temple Political and Civil Rights Law Review; Raynes McCarty Graduation Prize for scholarly achievement in the law

Admissions

  • New York
  • Pennsylvania
  • USDC, District of Colorado
  • USDC, Southern District of New York
  • USDC, Eastern District of New York
  • USDC, Eastern District of Pennsylvania
  • USDC, Eastern District of Arkansas
  • USDC, Western District of Arkansas
  • USCA, Second Circuit
  • USCA, Third Circuit
  • USCA, Eighth Circuit
  • USCA, Ninth Circuit
  • USCA, Eleventh Circuit
  • USCA, Federal Circuit
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