The aurora ransomware group listed ARX Group SA on its data leak site on 2026-10-23. Country: CH Sector: Other Claim as published on the leak site: [consultancies, engineering] ARX Group SA — one of Switzerland's premier engineering consultancies, with 25+ offices in 17+ countries, known for iconic projects including the Ceneri Base Tunnel and dozens of USTRA/SBB federal infrastructure contracts. The exposed material includes: 9,510 project fee structures with internal/external billing rates for every engineer — the complete pricing intelligence for one of Switzerland's largest infrastructure consultancies.