Williams & Connolly handles all aspects of antitrust litigation and represents major corporations and individuals — both as plaintiffs and defendants. The partners handling antitrust matters have vast experience in every type of litigation (e.g., civil, criminal, government enforcement, class action, business to business), and thus combine the firm’s traditional excellence in criminal and civil litigation with the knowledge and experience necessary to deal with complex antitrust matters. For additional information, please refer to the firm's criminal antitrust matters under Criminal Defense and Government Investigations.

Our lawyers also regularly represent clients in all aspects of civil antitrust litigation, including civil class actions, which today almost invariably follow major government investigations. Other civil clients have included plaintiffs alleging antitrust violations in the vitamin industry, a major tobacco company challenging the marketing practices of another company, and several state attorneys general seeking more effective remedies in the landmark Microsoft monopolization litigation. Clients the firm has defended span the spectrum from the major motion picture studios in federal and state civil antitrust investigations and private-party civil litigation, to the nation’s largest dairy cooperative in a series of class action antitrust cases pending in multiple federal and state courts.  In numerous other matters the firm defends, the plaintiffs seek not only significant monetary damages, but also substantial changes in long-standing industry practices.

The breadth of our overall litigation practice and that Williams & Connolly lawyers are multi-disciplinary litigators give us superior capabilities in antitrust cases that intersect with other areas of the law, including pharmaceuticals, financial services, intellectual property, healthcare, and sports law.


“Behavioural Matter of the Year for the Americas,” Global Competition Review, 12th Annual Awards 2022

Antitrust: Cartel, Chambers Global, 2022-2023

Antitrust: Cartel (Nationwide), Chambers USA, 2021-2023

Antitrust: Cartel (DC), Chambers USA, 2023

Antitrust - Tier 1, Benchmark Litigation, 2021-2023

Antitrust (Civil Litigation/Class Actions), The Legal 500, 2016-2022

Antitrust (Cartel), The Legal 500, 2016-2019

Antitrust, LMG Life Sciences, 2022

Williams & Connolly’s Antitrust Trial Win Shortlisted for “Litigation of the Year” by GCR

Williams & Connolly’s Antitrust Trial Win Shortlisted for “Litigation of the Year” by GCR
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