Thialf — Ransomware Incident Claimed by The Gentlemen
- Victim: Thialf
- Claimed by The Gentlemen
- Date claimed: 2026-07-23
- Country: NL
- Sector: Energy & Utilities
- Severity: High
Thialf is a world-renowned ice arena located in Heerenveen, Netherlands, often referred to as the "Cathedral of Speed Skating." It serves as the home base for the Dutch national speed skating team and hosts a wide range of ice sports, including long track and short track speed skating, figure skating, and ice hockey.