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40 & Under Hot List

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A partner in the Litigation Department, Brette Tannenbaum represents clients in a broad range of complex commercial litigation matters, with particular focus on antitrust, unfair competition, securities, and other investment management litigation. She has significant experience litigating cases in state and federal courts at both the trial and appellate levels, as well as before arbitration tribunals.

Significant representations include:

  • The Blackstone Group and its hedge fund division in a multi-billion dollar derivative lawsuit brought by beneficiaries of the Kentucky Retirement Systems alleging breach of trust and fiduciary duties;
  • General Electric in a billion dollar trade secrets misappropriation lawsuit against a direct competitor in the gas turbine industry;
  • News Corporation and certain subsidiaries in a putative class action and competitor lawsuits involving claims of exclusive dealing and monopolization, as well as the dismissal of unlawful bundling and tying claims following an evidentiary hearing before a panel of antitrust expert special masters;
  • Investment Technology Group, Inc. in the favorable resolution of a FINRA arbitration brought by a former employee who claimed that the company had disparaged him and tortiously interfered with his business relationships;
  • A major investment firm in the litigation and favorable resolution of multiple employment discrimination actions brought by former employees;
  • The Philadelphia 76ers in an internal investigation relating to the use of certain anonymous Twitter accounts to post information concerning the club, its personnel and related topics;
  • Chip Wilson, the founder and former CEO of lululemon athletica, in the dismissal of securities fraud class action and derivative
  • litigation concerning disclosures of product recalls.

Brette earned her A.B. from Princeton University, with honors, and her J.D. from Columbia Law School, where she was a James Kent Scholar and notes editor of the Columbia Law Review.

In 2020 and 2021, Brette was recognized by Benchmark Litigation on its “40 and Under Hot List.” Brette is a member of the New York State Bar Association’s Antitrust Law Section and the Federal Bar Council First Decades Committee. She also serves on the Board of Trustees of the Randall’s Island Park Alliance.


Updated July 2021