Leora Ben-Ami is an intellectual property partner in the New York office of Kirkland & Ellis LLP. Her practice includes all areas of technology, including biotechnology, medical devices, pharmaceuticals and chemistry, mechanical devices, and electronics. She has tried many jury trials as lead counsel and has extensive appellate experience, including arguing before the U.S. Court of Appeals for the Federal Circuit several times and serving as a law clerk there.

Before joining Kirkland, Leora represented Genentech and Astellas in Osi, Genentech v. Mylan, in which she successfully defended against Mylan's attempts to launch a generic version of Tarceva. She has tried numerous cases on behalf of Pfizer including, most recently, Pfizer v. Teva Pharmaceuticals USA, a case in which she successfully defended Pfizer's patents on Celebrex®.

Leora's work has been recognized by The American Lawyer, which named her one of "45 Under Forty-Five: The Rising Stars of the Private Bar," and The National Law Journal, which featured her jury trial verdict on behalf of ARIAD Pharmaceuticals against Eli Lilly in its annual "Defense Hot List." She has also been recognized by The Legal 500 U.S. as a "Leading Lawyer", Managing Intellectual Property IP Stars - Top 250 Women in IP, Benchmark: Top 250 Women in Litigation, PLC Global Counsel, The International Who's Who of Life Sciences Lawyers, Intellectual Asset Management (IAM) Life Sciences 250 — The World's Leading Life Sciences Lawyers, Chambers USA, America's Leading Lawyers for Business and Chambers Global, The World's Leading Lawyers for Business which wrote that Leora “is widely regarded as one of New York's best patent litigators." In 2017 and 2020, Leora was named to The Legal 500’s inaugural Hall of Fame in the “Intellectual property: Patent litigation: Full coverage” category.

Leora frequently speaks at conferences and seminars on patent law, having spoken at the PLI, the New Jersey Intellectual Property Association, the Sedona Conference and many others, and has published widely on intellectual property issues. Leora has also participated in legal education, having been the only practitioner on a panel with three federal judges to create a video on Markman hearings in the biotechnology area for the education of the federal judiciary.

Prior to joining Kirkland, Leora was a partner at Kaye Scholer, where she was co-chair of the intellectual property practice and a member of the executive committee. Earlier, Leora was a partner at Clifford Chance, where she was chair of the global intellectual property group and a member of that firm's board.


Thought Leadership


F.C. Mizzo, L. Ben-Ami, J.M. Wacker, J. Bova and J. Lam, “Pharmaceutical IP and Competition Law in the United States: Overview”, Thomson Reuters Global Guide on Practical Law, June 1, 2018

Memberships & Affiliations

New York State Bar Association

Federal Circuit Bar Association

American Intellectual Property Law Association

New York Intellectual Property Law Association, Board Member


Admissions & Qualifications

  • New York
  • Registered to practice before the United States Patent and Trademark Office


  • United States Court of Appeals for the Federal Circuit
  • United States Court of Appeals for the Third Circuit
  • United States District Court for the Southern District of New York
  • United States District Court for the Eastern District of Michigan
  • Supreme Court of the United States


  • State University of New York at BuffaloJ.D.cum laude
  • State University of New York at Stony BrookB.S.