Aaron S. Klein

Aaron S. Klein is a commercial litigator with an emphasis in the Real Estate, Financial Services, and Gaming practices. Aaron has significant experience in both state and federal court as well as arbitrations before FINRA, JAMS, and AAA. In the real estate sector, Aaron represents owners, developers, landlords, and tenants in landlord-tenant disputes, mechanic’s liens, and construction disputes. In the financial services sector, Aaron represents national banks and other financial institutions on matters including estate/probate disputes and alleged fraud/bad actors. Aaron also has deep experience with post-judgment proceedings and asset-recovery litigation.

In addition, Aaron maintains an active gaming practice, representing licensed casinos, video gaming terminal operators, and gaming equipment suppliers on issues concerning business licensing and regulatory compliance, contractual disputes, and taxes. He has played a primary role in defending licensed terminal operators in administrative proceedings in various municipalities in Illinois related to municipal “push” or “penny-per-pull” taxes.

Finally, Aaron is strongly committed to pro bono work and providing legal support to nonprofit organizations. Aaron has represented pro se litigants through the Northern and Southern Districts of Illinois with civil right claims relating to personal injury and wrongful termination. Aaron also volunteers his time representing artists, musicians, and authors through Lawyers for the Creative Arts.

Recognition & Leadership

Awards & Accolades

•Listed, The Best Lawyers in America, 'Ones to Watch,' Commercial Litigation, 2026
•Listed, Super Lawyers Magazine, Illinois Super Lawyers, “Rising Stars,” 2024-2026