Rio Pierce

Rio Pierce


Hagens Berman Sobol Shapiro LLP

Recognized since 2024

Berkeley, California

Practice Areas

Mass Tort Litigation / Class Actions - Plaintiffs

Send Rio Pierce an email at riop@hbsslaw.com Navigate to map location for Rio Pierce Call Rio Pierce at 510-725-3000
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Rio focuses his practice on enforcing antitrust laws and ensuring fair and free markets for the benefit of consumers.

CURRENT ROLE

  • Partner, Hagens Berman Sobol Shapiro LLP

RECENT SUCCESS

  • In re Broiler Chicken Antitrust Litig., No. 16-CV-08637 (N.D. Ill.), part of team at Hagens Berman for indirect purchaser class; recovery to date of $106 million
  • In re Pork Antitrust Litig., No. 18-CV-01776 (D. Minn.), part of team at Hagens Berman serving as co-lead counsel for indirect purchaser class; recovery to date of $109.4 million; Litigation ongoing
  • Qualcomm Antitrust Litig., No. 5:17-md-02773 (N.D. Cal.), part of team at Hagens Berman acting as counsel for indirect purchaser class that resulted in certified class of hundreds of millions of consumers
  • In re Optical Disk Drive Antitrust Litig., No. 10-md-02143 (N.D. Cal.), team at Hagens Berman acting as lead counsel for indirect purchaser class; recovery of $205 million

EXPERIENCE

  • Prior to joining Hagens Berman, worked as an associate for two years at Munger, Tolles & Olson, where he gained significant experience in class action and complex commercial litigation. Mr. Pierce also did extensive pro bono work on immigration matters
  • Law Clerk, U.S. Court of Appeals for the Ninth Circuit, Judge Jerome Farris, 2013-2014
  • Associate, Munger Tolles & Olson, 2014-2016

Contact & Links
Location
  • 715 Hearst Avenue, Suite 300
    Berkeley, CA 94710
Education
  • Harvard University, J.D., graduated 2013

Recognized in Best Lawyers: Ones to Watch® in America 2025 for work in:
  • Mass Tort Litigation / Class Actions - Plaintiffs
Awards:
  • Antitrust Enforcement Award Honoree, American Antitrust Institute, 2024

  • 500 Leading Lawyers in America, Plaintiff Financial Lawyers, Lawdragon, 2024-2025

  • Top 40 Under 40 Civil Plaintiff Trial Lawyers in California, The National Trial Lawyers, 2021

  • Chayes Fellow, National Prosecuting Authority in Cape Town, South Africa

  • Teaching Fellow, Copyright EdX

Additional Areas of Practice:
  • Technology Law
  • Litigation - Antitrust

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Publications

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