William J. Maledon

William J. Maledon is a distinguished commercial litigation and trial attorney with decades of experience in complex business disputes. He represents clients in federal and state courts across Arizona and nationwide, focusing on antitrust, securities defense, appeals, and high-stakes commercial litigation. He also serves as a mediator and arbitrator in significant matters. Known for his strategic advocacy and courtroom skill, he has built a reputation for leading large-scale and challenging legal cases.

William earned his J.D., summa cum laude, from the University of Notre Dame. He received his B.S. from Loyola University of Chicago. While at Notre Dame, he served as Editor in Chief of the Notre Dame Law Review and received the O’Meara Award. After law school, he clerked for Justice William J. Brennan, Jr. of the United States Supreme Court, gaining invaluable experience at the highest level of the judiciary.

Throughout his career, William has handled major trial and appellate matters involving complex commercial and regulatory issues. His experience spans antitrust litigation, securities defense, and sports-related disputes. He has appeared before numerous federal appellate courts and has been appointed to influential committees, including the Federal Rules Standing Committee and advisory committees within the Ninth Circuit. His work reflects deep knowledge of procedural and substantive law.

William J. Maledon has been recognized for more than 30 years in Best Lawyers® and has consistently been ranked by Chambers as a Leading Lawyer for Business. He has also been named Lawyer of the Year in multiple categories. Admitted to practice before the United States Supreme Court and several federal appellate courts, William remains a trusted advocate in sophisticated litigation and appellate matters nationwide.

Law Office Affiliations

• Attorney, Osborn Maledon, P.A.
• Member, National Academy of Distinguished Neutrals
• Elected Fellow, American Bar Foundation-1996
• Chair, State Bar of Arizona (1982-1983)
• Board of Directors, Phoenix Association of Defense Counsel (1989-1992)
• Founding Fellow, Arizona Bar Foundation
• Member, Sports Lawyers Association

Licensed State

• Arizona

Education

• University of Notre Dame
  Juris Doctor (JD)
• Loyola University of Chicago
  Bachelor of Science (BS)

Awards & Badges