Mayer Brown

Primarily practicing from its Chicago office, Mayer Brown has a strong product liability, mass torts, and class action litigation practice with extensive experience representing clients in multidistrict litigations across industries such as chemicals, automotive, medical devices, pharmaceuticals, and consumer products. The firm represents corporate clients in high-stakes matters including fraud, negligence, and product liability cases. Recent notable matters include defending The Big Ten Conference against putative class actions involving concussion claims by former collegiate athletes, and defending General Motors in nationwide class actions arising from battery fires in Chevy Bolt electric vehicles, with the product liability practice successfully opposing multidistrict litigation consolidation. Daniel Ring , co-leader of the product liability & mass torts practice, is known for his expertise in toxic torts and complex litigation, also playing a central role in ongoing PFAS litigation. Michael Olsen serves as lead counsel in high-profile disputes, including PFAS cases involving natural-resource damages and claims of punitive damages. Both Ring and Olsen are based in the firm's Chicago office.