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Helene D. Jaffe is a Partner in the Litigation Department, and head of the firm's Antitrust Group. Her practice concentrates on the transactional, counseling and litigation aspects of antitrust law with a focus on mergers & acquisitions, joint ventures, single firm conduct and distribution matters.

Helene represents clients buying or selling companies in the U.S. or around the world and appears before global, federal and state antitrust agencies and the federal judiciary. She also represents clients whose pricing, promotional or marketing practices are under scrutiny or challenged by the Antitrust Division, Federal Trade Commission and other state and federal regulatory agencies. She has been involved in numerous Lanham Act advertising, trademark and trade dress cases, encompassing injunctions and bench and jury trials. Her clients span a wide range of industries including healthcare, chemicals, pharmaceuticals, cosmetics, over-the-counter products, food, nutritional supplements, lodging, defense, retail and hi-tech.

In all of these substantive areas, Ms. Jaffe develops and implements pro-active strategies—often coordinating activities in multiple jurisdictions and forums—to achieve successful legal and commercial outcomes for her clients.