The qilin ransomware group listed 550madison.com on its data leak site on 2025-06-12. Country: US Sector: Professional Services Domains named: 550madison.com, olayan.com Claim as published on the leak site: All data of this company will be available for download on 23.06.2025. 550 Madison is an architectural landmark in New York City, a building managed by The Olayan Group(https://olayan.com/) Anticipated clients include companies seeking a pre ...