William E. Walsh attorney profile image

William E. Walsh

300 North LaSalle Street
Suite 2200
Chicago, IL 60654
T: (312) 820-5114
F: (312) 820-5106
Practice Areas
  • J.D., Georgetown University Law Center, 2005
  • B.A., University of Southern California, 2002
  • California
  • District of Columbia
  • Illinois


William Walsh represents clients in the financial industry in complex commercial litigation. This includes class actions related to currency benchmarks and high frequency trading, SEC and exchange investigations, FINRA arbitration, and cryptocurrency offerings.

He previously served in the Litigation and Dispute Resolution Practice in the Chicago office of a large international law firm for three years.

Prior to that, Mr. Walsh spent four years at CME Group Inc., an American global markets company that is the world's largest financial derivatives exchange, and trades in asset classes that include agricultural products, currencies, energy, interest rates, metals, stock indexes and cryptocurrencies futures.

Mr. Walsh served in CME Group’s Market Regulation Department, most recently as Senior Enforcement Counsel. There he prosecuted and investigated rule violations on CME Group Exchanges related to matters including disruption trading and messaging, spoofing, trading algorithm and system malfunctions, wash trades, position limit violations and non-competitive trading. He also conducted hearings before Exchange disciplinary panels and administered Exchange arbitration process.

An Adjunct Professor at the Loyola University Chicago School of Law, Mr. Walsh is a member of the Chicago Bar Association’s Judicial Evaluation Committee.