The black x ransomware group listed Court Square Group on its data leak site on 2026-11-10. Country: US Sector: Financial Services Domains named: courtsquaregroup.com Claim as published on the leak site: We hacked into Court Square Group internal network and stole 3T of customer data from the RegDocs365 and ARCC cloud network. It includes sensitive info such as clinical trial data, research materials, and various reports belonging to Court Square Group customers. To demonstrate our credibility, we will provide a list of some of the data files currently in our possession within the next few days. You may then select files from this list, and we will send the ones you have chosen.