Of counsel in the Paul, Weiss Litigation Department (which he chaired for six years), Martin Flumenbaum has achieved national recognition as a litigator and corporate advisor. He regularly advises U.S. and international clients on a broad range of litigation issues, with an emphasis on securities, mergers and acquisitions, commercial litigation, intellectual property, antitrust and white-collar matters.
Lawdragon Honors
| Honor | Year | Practice |
|---|---|---|
| The 2025 Lawdragon 500 Leading Litigators in America | 2025 | Complex Litigation, esp. Financial |
| The 2024 Lawdragon 500 Leading Litigators in America | 2024 | Complex Litigation, esp. Financial |
| Lawdragon 500 Leading Litigators in America | 2022 | Complex Litigation, esp. Financial |
Significant lead trial counsel representations include:
- Ripple co-founder Chris Larsen in securing the dismissal of an SEC lawsuit alleging that Larsen and Ripple CEO Brad Garlinghouse had altogether conducted over $2.6 billion in unregistered securities transactions through the sale of Ripple’s native digital token XRP. Flumenbaum secured a landmark summary judgment ruling in which the Southern District of New York held that the sale of digital assets on public exchanges does not constitute the sale of unregistered securities.
- XPO Logistics, Inc. and its Chairman and CEO in securing the dismissal, with prejudice, affirmed on appeal by the Second Circuit, of a securities class action alleging that XPO had misled investors by concealing the importance of its largest customer, Amazon, in driving the company’s growth, and concealing the fact that Amazon began cutting ties with XPO around March 2018;
- Andrew Madoff and the Estate of Mark Madoff in the dismissal of numerous lawsuits and investigations arising out of Bernard L. Madoff’s Ponzi scheme. The only court to address the matter on the merits, found that neither Andrew nor Mark knew neither knew of, or suspected the fraud;
- AIG in a number of high profile matters, including the negotiation of AIG’s settlements involving brokerage practices and accounting issues with the U.S. Department of Justice, the U.S. Securities and Exchange Commission, the New York State Attorney General and the New York State Department of Insurance;
- Banque Populaire Group and Caisse d’Epargne Group in connection with the final settlement reached by their jointly owned monoline subsidiary, CIFG Holding, Ltd., with credit default swap counterparties and bondholders holding 98 percent of its collateralized debt obligation (CDO) exposure. The agreement resolved approximately $12 billion in potential exposure;
- Fitch, Inc. in a number of high profile matters including an industry-wide settlement with New York Attorney General Andrew Cuomo, and the dismissal of more than a dozen securities cases involving the rating of non-prime residential mortgage-backed securities;
- Michael Milken in proceedings involving the Department of Justice and the Securities and Exchange Commission;
- Weight Watchers International in several significant trademark infringement actions, including a false advertising suit against Jenny Craig, Inc. and a trademark infringement lawsuit against Nestlé U.S.A., Inc., the manufacturer of Lean Cuisine products, and Dreyer’s Grand Ice Cream, the manufacturer of Skinny Cow products