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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.

  • Representation of Wells Fargo Bank in multiple class actions under California's Unfair Competition Law and other state and federal laws involving disclosures, bank fees, and other banking issues.
  • Representation of the National Football League in a class action alleging that the NFL and its member clubs had unlawfully conspired to fix cheerleader compensation.
  • Representation of the National Football League member clubs in a class action brought by retired players involving alleged improper administration of prescription pain medications.
  • Representation of Navient Solutions and its affiliates in multiple class actions involving disputed interest rates and fees on student loans.
  • Representation of the National Football League in an antitrust class action relating to the League’s licensing arrangements for the use of NFL trademarks on apparel.
  • Representation of the San Francisco 49ers in a lawsuit challenging the National Football League’s pat-down security policy.
  • Representation of Procter & Gamble Pharmaceuticals in an antitrust and unfair trade practices lawsuit involving authorized generic pharmaceuticals.
  • Daily Journal, "Top Women Lawyers" (2007-2010, 2012-2013, 2016-2020)    
  • Northern California Super Lawyers, Antitrust Litigation (2005-2017)
  • Chambers USA - America's Leading Business Lawyers, Litigation/General Commercial (2010-2011)