Peter Spaeth’s practice focuses on securities and antitrust matters. For three decades, he has represented a variety of corporations, as well as their officers and directors, in securities fraud class actions, shareholder derivative suits, merger litigation, complex antitrust class actions and other suits, government investigations, and a variety of other commercial litigations and arbitrations. Mr. Spaeth has extensive experience in briefing a range of sophisticated and difficult legal issues at all stages of litigation. He has been a principal author of countless briefs filed in federal and state trial and appellate courts throughout the country, including the Supreme Court of the United States. He has helped secure dismissal of numerous securities fraud class actions and shareholder derivative suits, among others.

Mr. Spaeth’s clients in securities matters have included Apollo Education Group, Aveo Pharmaceuticals, BJ’s Wholesale Club, Cynosure, Endurance International Group, Intercept, InVivo Therapeutics, Kior, The Medicines Company, Medtronic, MKS Instruments, Primus Telecommunications, Sonus Networks, Staples, State Street Corporation, Tetraphase Pharmaceuticals, Theranos and Transkaryotic Therapies. His antitrust clients have included American Tower Corporation, Analog Devices, Avid Technologies, Baker Hughes, Cephalon, IDEXX Laboratories, National Grid USA., Northern Telecom, Ocean Spray, Prime Computer and Thermo Electron Corporation.

Professional Activities

Mr. Spaeth is a member of the American Bar Association and the Massachusetts Bar Association.