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, unfair trade practices, and patent infringement.
Matt is currently litigating several nationwide securities cases on behalf of U.S. and overseas investors. He serves as lead counsel for shareholders in In re Celgene Securities Litigation (D.N.J.), alleging that Celgene fraudulently concealed clinical problems with a developmental drug. Matt is also class counsel in Sjunde AP-Fonden v. The Goldman Sachs Group (S.D.N.Y.), a securities fraud case 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 $130 million recovery 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. This marked the first settlement of a federal securities case alleging concealment of the conspiracy which is believed to be the largest domestic 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 recovery ever in a Securities Act class action brought on behalf of corporate bondholders. Matt represented the class in In re Pfizer Securities Litigation (S.D.N.Y.), a twelve-year fraud case 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 securities fraud action 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 on behalf of 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 secured a $100 million recovery 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 for fraudulently displaying and charging for online ads beyond the geographical parameters set by advertisers.
A frequent speaker and writer on securities law and litigation, Matt’s publications have been cited 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.
Updated Oct 2025
