Michael D. Pinnisi 

Partner – New York
T.+1 212 504 6413
200 Liberty Street
New York, NY 10281 V-CARD

Michael Pinnisi is a partner in the Corporate Group in New York.

Michael joined Cadwalader from Hudson Executive Capital LP, where he served as General Counsel, Chief Compliance Officer, and Chief Operating Officer. Hudson Executive Capital LP is an SEC-registered financial advisor led by founder and managing partner Douglas L. Braunstein, the former CFO and Vice Chairman of JPMorgan Chase. As General Counsel, Michael was responsible for all legal matters of the firm and its several affiliates, including formation of investment vehicles, corporate governance, regulatory compliance, contract negotiation, proxy contest litigation, class action litigation, and consultation with portfolio company management and outside counsel regarding their legal matters. He also served as COO, managing all firm operations including outside counsel selection and management.

His prior legal experience was a mix of corporate, contract, and litigation across a broad range of subject matters, including corporate formation and finance, high technology development and monetizing, intellectual property, commercial contract negotiation and dispute resolution, breach of fiduciary duty claims, internal corporate investigations, and criminal prosecution and defense, among many others. Over the course of a nearly 40-year career, Michael served as an Assistant U.S. Attorney for the Southern District of New York in its civil and criminal divisions; a Special Assignment Assistant U.S. Attorney in the District of Columbia; a trial attorney in the U.S. Department of Justice Honor Program; General Counsel and Vice President, Business Development at Kionix, Inc., a world leader in microelectromechanical sensor design and manufacturing; founder of a boutique corporate and litigation firm; an associate at two leading international law firms; and an adjunct professor of law at Cornell Law School. He is a named inventor of U.S. Patents in the fields of additive manufacturing and treatment of infectious disease.

Michael’s work at Cadwalader includes both corporate and litigation matters, including contested transactions at the intersection of both.

Michael D. Pinnisi 


  • U.S. Court of Appeals for the Federal Circuit
  • U.S. District Court, Southern District of New York
  • U.S. District Court, Northern District of New York
  • New York


  • Cornell Law School
  • Cornell University