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Sonya Winner, a partner in the firm's San Francisco office, focuses primarily on complex civil litigation. Her cases typically involve difficult technical issues and/or complex legal and regulatory schemes. She has handled numerous antitrust and consumer disputes, many of them class actions, for clients in the banking, pharmaceuticals, and professional sports industries. She has also handled several patent and trade-secret cases involving a variety of technologies, including microfluidics, microprocessor design, and biotechnology. She has tried cases before judges and juries in numerous courts, both in California and elsewhere.
Representative Matters
- Representation of Wells Fargo Bank in multiple class actions under California's Unfair Competition Law (Section 17200) and Consumer Legal Remedies Act involving disclosures and other banking issues.
- Representation of the San Francisco 49ers in a lawsuit challenging the National Football League’s pat-down policy;
- Representation of Bank of America in a nationwide antitrust class action challenging interchange fees on ATM transactions;
- Representation of Procter & Gamble Pharmaceuticals in an antitrust and unfair trade practices lawsuit involving authorized generic pharmaceuticals;
Honors and Rankings
- San Francisco and Los Angeles Daily Journal, Top Women Litigators (2007-2010)
- Northern California Super Lawyers, Antitrust Litigation (2005-2010)
- Legal 500 US, Trade Secrets - Integrated Service, Advice and Litigation (2007)
Publications and Speeches
- "Teaching Complexity to Communicate with the Fact Finder," Association of Business Trial Lawyers Annual Seminar (September 2008)
- "Recent Developments in the Law of Federal Preemption," California Bankers Association Bank Counsel Seminar (March 2006)
- "Holmes v. Vornado: Impact on Federal Circuit Jurisdiction," ACI Eighth National Advanced Forum on Litigating Patent Disputes (March 2003)
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