Margaret A. Webb

Margaret Webb is a partner in Goodwin’s Antitrust and Competition practice and a member of the firm’s Complex Litigation & Dispute Resolution group.

Margaret represents clients in a wide range of high-stakes antitrust and competition-related matters, including complex civil litigation, government investigations, and enforcement actions. Her domestic and multinational clients span a variety of industries, including media, technology and software, manufacturing, transportation, and pharmaceuticals. Margaret has extensive experience in claims of price-fixing, wage-fixing, no-poach conduct, market allocation, group boycotts, and monopolization, as well as antitrust counterclaims in IP and patent matters.

Margaret regularly counsels clients on antitrust risks arising from industry collaborations, trade associations and other joint activities, pricing algorithms and other AI tools, and labor market practices. Margaret partners with clients to help them design and implement antitrust compliance programs and routinely delivers antitrust training for executives and employees.

Margaret’s active pro bono practice includes representing clients in asylum, civil rights, and free-speech matters.

Margaret’s representative experience includes:

• Nexstar Media Group. Defended Nexstar against a nationwide putative class action alleging price fixing in the broadcast television spot advertising industry*
• Avadel Pharmaceuticals. Represented Avadel in a lawsuit alleging monopolization and other unlawful conduct by Jazz Pharmaceuticals, resulting in a $90 million global settlement weeks before a scheduled trial*
• Cedar.AI. Represented Cedar.AI in bringing monopolization counterclaims against the dominant provider of certain software for shortline railroads, resulting in a favorable settlement after fact discovery*
• Provi. Represented Provi, provider of a major B2B alcohol marketplace for commercial retailers to order alcohol products from distributors, in asserting antitrust, unfair competition, and tort claims against dominant alcohol distributors*
• Matsuo Electric. Represented Matsuo, a Japanese capacitor manufacturing company, in defense of a price-fixing class action involving alleged exposure exceeding $1.2 billion, resulting in a mid-trial settlement with direct purchaser plaintiffs for $5 million*
• Murata Manufacturing. Represented Murata, a Japanese electric components manufacturer, in a putative class action alleging that certain electronics manufacturers conspired to fix the prices of inductors*
• Represented a multinational telecommunications conglomerate in the DOJ Antitrust Division’s criminal cartel investigation*
• Represented a group of defendant landowners in a price-fixing case alleging that the defendants fixed prices for land in Solano County*
• Represented several individuals in the DOJ Antitrust Division’s no-poach investigation in the fintech industry*

*Denotes experience prior to joining Goodwin

• Executive Committee Member, Bar Association of San Francisco, Antitrust & Business Regulation Section (2024 – Present)
• Publications Committee Member, California Lawyers Association, Antitrust and Unfair Competition Law Section (2023 – 2024)

• Lawyer to Watch – California Lawyers Association, Antitrust and Unfair Competition Law Section (November 2024)

• Speaker, “Cartel & Criminal Practice Committee Update,” American Bar Association, (January 2026)
• Co-author, “Trends in Non-Compete Litigation and Enforcement,” Competition Journal, (October 2024)
• Author, “Connecticut Federal Judge Allows Antitrust Claims Against Hartford HealthCare to Proceed,” California Lawyers Association, (April 2023)
• Author, “Drawing the Line Between Collaboration and Collusion,” Corporate Compliance Insights, (May 2020)