Sejlstrup

Sejlstrup was compromised in a ransomware attack attributed to THEGENTLEMEN in February 2026. The organization, operating in an undisclosed sector in DK, 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.

sejlstrup.dk dnb.com/business-directory/company-profiles.sejlstrup_entreprenørforretning_a-s.f02d652f10fa8eb32e3503df8d0d3eb0.html a major construction and contracting company established in 1991 . The company employs 150 people and reported a gross profit of 101.6 million DKK (approx. 13.6 million EUR) in 2023, with excellent profitability ratings . The business is owned by the holding company SEJLSTRUP HOLDING II ApS .