Current Role
  • Senior Counsel, HB Sweden AB (previously a Partner at Hagens Berman Sobol Shapiro LLP until 2022)
  • Focuses on class actions, primarily antitrust litigation
Recent Cases
  • Represents multiple proposed consumer class action antitrust lawsuits against Amazon, including:
  •             Frame-Wilson et al. v., Inc., 2:20-cv-00424-RAJ (W.D. Wash.), which was the first antitrust lawsuit filed against Amazon based on its policy of prohibiting third-party sellers from lowering the price of their goods on platforms that compete with Amazon;
  •             In Re, Inc. eBook Antitrust Litigation, No. 1:21-cv-351-GHW-DCF (S.D.N.Y), where Hagens Berman was appointed interim lead counsel on behalf of a proposed class action against Amazon and the five largest trade book publishers for conspiring to fix the price of eBooks;
  •             De Coster v., Inc., No. 2:21-cv-00693-RSM (W.D. Wash), where Hagens Berman was also appointed interim co-lead counsel, representing a class of Amazon customers, who allege that Amazon’s agreements with its third-party sellers caused them to overpay for their purchases on Amazon Marketplace;
  •             Brown v., Inc., No. 22-cv-00965-JHC (W.D. Wash), representing a proposed class of consumers, who allege that Amazon colludes with its suppliers to fix prices online; and
  •             Floyd v., Inc., No. 2:22-cv-01599-JCC (W.D. Wash), representing a proposed consumer class action, alleging that Amazon and Apple conspired to increase consumer prices through an illegal boycott of Apple product sellers on Amazon Marketplace
  • Represents  proposed class in Dorabiala v., Inc., No. 2:22−cv−01600−JCC (W.D. Wash), alleging that Amazon employs dark patterns to mislead Prime customers seeking to end their subscriptions
  • Represents a proposed class of booksellers in Bookends and Beginnings, LLC, v. Amazon, et al., No. 21-cv-02584-GHW-DCF (S.D.N.Y), alleging that Amazon and the five largest trade book publishers colluded to fix the price of print trade books
  • Extensively involved in several lawsuits against McKesson Corporation relating to allegations that the company engaged in a scheme that raised the prices of more than 400 brand-name prescription drugs. That litigation has resulted in two separate national class-action settlements for $350 million and $82 million. In related litigation, Ms. Mahoney represented the commonwealth of Virginia, and the states of Connecticut, Arizona, Oregon, Utah and Montana in their individual cases against McKesson.
  • Represents proposed class of direct purchasers in multidistrict litigation alleging that generic drug manufacturers engaged in price fixing in In re: Generic Pharmaceuticals Pricing Antitrust Litigation
  • Associate, Calfo Harrigan Leyh & Eakes LLP (formerly Danielson Harrigan Leyh & Tollefson)
  • Law Clerk, Justice Sanders, Washington Supreme Court
  • Law Clerk, Judge Saundra Brown Armstrong, U.S. District Court, N.D. California
  •    Rising Star, Washington Law & Politics, 2005
  •    Lawdragon, 500 Leading Plaintiff Consumer Lawyers, 2021-22
Notable Cases
  • New England Carpenters v. First DataBank ($350 million class-action settlement)
  • Douglas County v. McKesson ($82 million class-action settlement)
  • Swedish (Fluent)
  • German (Fluent)
  • French (Reading Proficiency)
Personal Insight

Ms. Mahoney, a former Seattleite, now lives in Sweden. She enjoys reading, running, soccer and studying foreign languages.