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ProfessionalsBrette Tannenbaum

Brette Tannenbaum

Tel: +1-212-373-3852
Fax: +1-212-492-0852

Tel: +1-212-373-3852
New York

1285 Avenue of the Americas
New York, NY 10019-6064
Fax: +1-212-492-0852

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A partner in the Litigation Department and Deputy Chair of the Antitrust Practice Group, Brette Tannenbaum represents clients in a broad range of complex commercial disputes, with particular focus on antitrust and unfair competition litigation. She has significant experience litigating high-stakes cases in state and federal courts at both the trial and appellate levels, as well as before arbitration tribunals.


Brette’s significant representations include:

  • Blackstone 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 the favorable resolution of multiple antitrust litigations, including 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;
  • Mastercard in multiple antitrust class action litigations, including the so-called “interchange” multidistrict litigation brought by putative classes of U.S. merchants and related opt-out actions brought by nearly 100 of the largest merchants in the U.S., challenging payment card “interchange” fees and certain rules governing merchants’ acceptance of payment cards, as well as class action litigation brought by U.S. merchants alleging that major payments networks, together with card-issuing banks, conspired to shift fraud costs for certain card transactions from the issuing banks onto merchants in connection with the roll-out of EMV-chip cards in the U.S.;
  • The National Football League and six of its teams in a putative class action alleging racial discrimination in the hiring and retention of head coaches and senior executives;
  • Major League Baseball in a putative antitrust class action litigation involving the sale of MLB licensed products in third-party online marketplaces;
  • The International Swimming League in antitrust litigation against a competitor in the promotion and organization of international swimming competitions;
  • 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;
  • Wafra Inc. in a variety of matters, including the favorable resolution of multiple employment discrimination actions brought by former employees;
  • 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.

Brette was most recently named an “Up and Coming” lawyer in 2023 by Chambers in the Litigation: General Commercial (NY) category and as a 2023 Law360 “Rising Star” for Sports & Betting. Benchmark Litigation recognized Brette on its “40 and Under Hot List” in 2020, 2021, and 2022, most recently calling her an “emerging talent in antitrust litigation.” The New York Law Journal named Brette a “Rising Star” in its 2021 New York Legal Awards. 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.

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