Sonya Winner

Sonya D. Winner

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Covington & Burling LLP
One Front Street
San Francisco, CA 94111-5356
Tel: +1 415 591 7072



  • Harvard Law School, J.D., 1982
    • magna cum laude
  • Michigan State University, B.A., 1979
    • high honors
    • Honors College

Judicial Clerkship

  • Hon. Louis F. Oberdorfer, U.S. District Court, District of Columbia, 1982-1983

Bar Admissions

  • California
  • District of Columbia

A litigator with three decades of experience, Sonya Winner handles high-stakes civil cases for clients in a wide range of industries, including banking, pharmaceuticals and professional sports.  She has handled numerous antitrust and consumer disputes, many of them class actions, in state and federal courts across the country.

Ms. Winner’s cases typically involve difficult technical issues and/or complex legal and regulatory schemes.  She is regularly able to resolve cases before the trial phase, often through dispositive motions.  But when neither summary judgment nor a favorable settlement is an option, she has the confidence of her clients to take the case all the way through trial and on appeal.

Ms. Winner has been recognized as a leading trial lawyer by publications like Chambers and the Daily Journal.  She is chair of the firm’s Consumer and Class Action Litigation practice group.

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, 2012-2013)
  • Northern California Super Lawyers, Antitrust Litigation (2005-2014)
  • Chambers USA - America's Leading Business Lawyers, Litigation/General Commercial (2010-2011)
  • Legal 500 US, Trade Secrets - Integrated Service, Advice and Litigation (2007)

Publications and Speeches

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