Elaine T. Byszewski

Litigated Milk Antitrust from complaint filing to recent settlement of $52 million

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Current Role

  • Partner, Hagens Berman Sobol Shapiro LLP
  • Ms. Byszewski has litigated a number of complex class actions on behalf of consumers, employees and whistleblowers resulting in multimillion-dollar settlements, including cases against Toyota, Ford, AstraZeneca Pharmaceuticals, Berkeley Premium Nutraceuticals, Solvay Pharmaceuticals, Costco, Apple and KB Homes.
  • Currently, Ms. Byszewski is involved in:
    • Multi-state antitrust action against major dairy cooperatives for colluding in the premature slaughter of a half a million cows to drive up the price of milk
    • Deceptive advertising case against Mars, Nestle, and Hershey involving their undisclosed use of child and slave labor in Ivory Coast chocolate supply chains
    • Deceptive advertising case against the makers of Chicken of the Sea, Fancy Feast, Iams, and Meow Mix involving their undisclosed use of slave labor in Thai seafood supply chains 
    • Hagens Berman's representation of the City of Los Angeles and other municipalities in litigation against major banks for discriminating against minority borrowers

Recent Success

  • Litigated Milk Antitrust from complaint filing to settlement of $52 million and received the American Antitrust Institute’s 2018 award for Outstanding Antitrust Litigation Achievement in Private Law Practice
  • Member of litigation team that settled Toyota Unintended Acceleration Litigation for $1.6 billion and was a finalist for Public Justice’s 2014 Trial Lawyer of the Year award


  • Prior to joining Hagens Berman, Ms. Byszewski focused her practice on labor and employment litigation and counseling. During law school she worked in the trial division of the office of the Attorney General of Massachusetts.

Notable Cases

  • Dairy Cooperatives Antitrust Litigation
  • SeaWorld Consumer Lawsuit
  • Chocolate Child Labor Cases
  • Seafood Slave Labor Cases
  • Toyota Unintended Acceleration
  • Ford Spark Plugs
  • AstraZeneca Pharmaceuticals (Nexium) Litigation
  • Merck (Vioxx) Litigation
  • Berkeley Nutraceuticals (Enzyte) Litigation
  • Solvay Pharmaceuticals (Estratest) Litigation
  • Apple iPod Litigation
  • Costco Wage and Hour Litigation


  • "Valuing Companion Animals in Wrongful Death Cases: A Survey of Current Court and Legislative Action and A Suggestion for Valuing Loss of Companionship," Animal Law Review, 2003, Winner of the Animal Law Review's 5th Annual Student Writing Competition
  • "What's in the Wine? A History of FDA's Role," Food and Drug Law Journal, 2002
  • “ERISA and RICO: New Tools for HMO Litigators,” Journal of Law, Medicine & Ethics, 2000

Personal Insight

Ms. Byszewski’s proudest moment was teaching her older son to swim. Tennis is next on the agenda. Her biggest challenge is keeping her two-year-old out of trouble.