Matthew Hosen

Matt Hosen is Of Counsel based out of Quinn Emanuel's Seattle office. His practice is focused on high-stakes commercial, antitrust and product liability litigation. Matt began his career suing Wall Street banks for fraud relating to the collapse of the residential mortgage-backed securities market in the late 2000's. He has extensive experience representing plaintiffs and defendants in connection with price-fixing and monopolization claims, class actions, and employment disputes.

Recently, he played an integral role in the largest mass tort in history, In re: 3M Combat Arms Earplug Prod. Liab. Litigation. He was involved in all stages of this litigation, including first- and second-chairing several bellwether trials. Matt helped obtain over $300 million in verdicts for 13 U.S. Army veteran plaintiffs who served America with honor and came back with hearing loss and tinnitus after using defective hearing protection. In August, 2023, after years of hard-fought litigation, the parties reached a global settlement, with 3M agreeing to pay over $6 billion to over a quarter-million former and active military servicemembers.