Thialf

Thialf was compromised in a ransomware attack attributed to THEGENTLEMEN in July 2026. The organization, operating in the Energy & Utilities sector in Netherlands, was added to the group's data leak site as part of an extortion campaign.

THEGENTLEMEN operates as a financially motivated ransomware-as-a-service (RaaS) operation, exfiltrating sensitive data and threatening public disclosure to pressure victims into paying ransom demands.

thialf.nl zoominfo.com/c/thialf/430686423 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. Recently, it was officially confirmed as the long-track speed skating venue for the 2030 Winter Olympics. The facility is celebrated for its modern, sustainable design and its role as a major hub for both elite professional competitions and public recreational skating.