Proskauer Rose LLP

Proskauer Rose LLP‘s mid-market litigious practice has a strong track record in antitrust, class actions, and trial work in federal and state courts. Bart Williams, chair of the litigation department in Los Angeles, focuses on headline commercial litigation, including major antitrust and mass tort matters. Michael Mervis, vice-chair in New York, focuses on bet-the-company commercial disputes, often involving financial services and governance issues. Also in New York, Grant Esposito is a skilled advocate in class actions and coordinated mass proceedings, with particular exposure to tort and environmental disputes, while David Fioccola advises on high-stakes contract litigation and competition-related business conflicts. In LA, Susan Gutierrez concentrates on commercial litigation and employment-related matters, while Boston-based Colin Cabral is highly effective in IP-driven disputes and contract and antitrust litigation. The team expanded in 2025 with New York’s Nicole Bergstrom, who navigates defamation, breach of contract, and copyright challenges; Washington DC’s Jaclyn Phillips, who steers complex antitrust litigation; and Richard Westling, based in LA and DC, who targets healthcare litigation and enforcement matters.