The incransom ransomware group listed rosemontexpo.com on its data leak site on 2025-11-13. Country: US Sector: Professional Services Domains named: rosemontexpo.com Claim as published on the leak site: Rosemont Exposition Services, Inc. is an Illinois-based company that offers exhibitor show services. These include exhibit rentals, utilities, decorating services, catering, and area information. Formerly known as O'Hare Exposition Services, they primarily function as the full-service general contractor for all trade shows and events held at the Donald E. Stephens Convention Center located in Rosemont, IL. Employees: 500 Revenue: $48.6 Million Industry: Business Services Phone Number: (847) 696-2208