William C. O'Neil

Top rated Business Litigation attorney in Chicago, Illinois

Winston Taylor

Practice areas: Business Litigation, Securities Litigation, Antitrust Litigation

Licensed in Illinois since: 2003

Education: Washington University in St. Louis School of Law

Selected to Super Lawyers: 2025 - 2027

Winston Taylor

300 N La Salle Dr
Suite 4400
Chicago, IL 60654

William C. O'Neil is a top-rated attorney who practices law in Chicago, Illinois. William O'Neil focuses on Business Litigation issues. Additionally, he also helps clients with legal issues in the following areas of law: Securities Litigation and Antitrust Litigation.

William O'Neil received the Super Lawyers designation for 2025 - 2027. He was selected for this honor after undergoing an evaluation of many different factors including peer recognition and professional achievement.

He started practicing law in 2003. Before practicing law, he attended law school at Washington University in St. Louis School of Law and graduated in 2000.