The akira ransomware group listed Seppeler Gruppe on its data leak site on 2025-06-24. Country: DE Sector: Manufacturing Domains named: seppeler.de Claim as published on the leak site: Die Seppeler Gruppe is a group of internationally producing servi ce companies.. We are going to upload another 11 GB of corporate data. You will find employee personal information (DOB, address, identification numbers and so on), financial data, payment details, project data and so on.