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Gregory Halperin

Greg Halperin is a trial lawyer trusted by leading life sciences and technology companies to handle their most complex product liability and mass tort litigations. He has spent over 170 days in trial across eight high-stakes cases, with experience at every stage─from opening statements to appeals.

Greg is frequently retained for nationally-watched litigation, including serving as counsel to Meta Platforms in more than 1,000 personal injury, public nuisance, and consumer protection lawsuits alleging teen mental health harms related to social media use. He played a key role in securing a complete defense verdict in the first opioids case involving wholesale distributors to reach a verdict. He has also delivered pre-trial, trial, and appellate wins in MDLs and centralized state-court proceedings involving Roundup, Pradaxa, Mirena, Accutane, and other high-exposure matters.

Clients turn to Greg to prepare and defend senior executives for depositions, argue critical motions, deliver compelling jury examinations and presentations, and frame appellate strategy. He has authored amicus briefs before the U.S. Supreme Court and testified before the Advisory Committee on Civil Rules on procedural rules for MDLs.

He is recognized by Chambers USA as an “Up-and-Coming” lawyer in Product Liability and Mass Torts, and has been named a “Rising Star” by both Law360 and New York Metro Super Lawyers. He appears on Best Lawyers’ “Ones to Watch” list and was an American Lawyer Litigator of the Week Runner-Up. He was also recognized as an Outstanding Contributor by Lawyers for Civil Justice for his efforts to reform the procedural rules governing mass tort litigation.

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Courts and litigants continue to grapple with the new frontier of artificial intelligence (“AI”).  One recent case in California demonstrates a new wrinkle in this evolving landscape—the use of AI to aggregate class claims.

Because class settlements bind absent class members who do not object or opt out, Rule 23 requires courts to carefully review and approve them as “fair, reasonable, and adequate.”  An important part of this inquiry is making sure class members are given adequate notice of the terms of the proposed settlement and their rights.  When class members are required to submit claims to access settlement benefits, parties often turn to professional claims administration companies to assist in providing notice and facilitating the claims process.  Under Rule 23, courts closely monitor the information that flows from class counsel and claims administrators to putative class members to make sure it complies with due process.

Continue Reading California Federal Court Clamps Down on ‘En Masse’ Class Claims Identified by AI