The incransom ransomware group listed Chicago History Museum on its data leak site on 2026-11-12. Country: US Sector: Education Domains named: chicagohistory.org Claim as published on the leak site: # CHICAGO HISTORY MUSEUM — DATA BREACH ![CHM Logo](logo_color.svg) **Organization:** Chicago History Museum (formerly Chicago Historical Society) **Location:** 1601 N Clark Street, Chicago, IL 60614 **Website:** chicagohistory.org **CEO:** Michael J. Anderson, President & CEO **Industry:** Non-profit / Cultural Institution **Breach Date:** September 2026 **Data Volume:** 4 departments + AWS cloud infrastructure, 15+ years of records **Individuals Affected:** 20,000+ --- ## WHA