C2O Architects Listed by thegentlemen Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
C2O Architects was listed by thegentlemen ransomware group on May 06, 2026, with internal files reported as exfiltrated from an undisclosed number of people. Individuals connected to the firm should check whether their information was exposed and take appropriate protective steps.
Breaking down the breach
The incident came to light through a listing on the threat actor’s leak site. The only confirmed element is that internal files were allegedly exfiltrated. No information has been released on the date of the intrusion, the method of access, the quantity of data taken, or whether any material was subsequently published. The scale of potential exposure is therefore unconfirmed.
Who is thegentlemen?
Thegentlemen is a ransomware group that maintains a leak site where it lists organisations it claims to have targeted. Such groups typically encrypt systems and threaten to release stolen data if ransom demands are not met. The appearance of C2O Architects on the site constitutes the group’s claim of involvement; independent confirmation of the underlying events has not been reported.
Who is C2O Architects?
C2O Architects, formally C2O-Architects bv, is a Belgian firm established in 2000 and based in Asse, Flemish Brabant. It undertakes architectural and urban-planning work ranging from private residential projects to larger public developments. In the course of its operations the firm handles project documentation, client correspondence and regulatory materials that can contain personal and commercial information.
The information in question
The only description provided is that internal files were allegedly exfiltrated. No inventory of specific data categories has been disclosed. Organisations of this type routinely process client contact details, project specifications, financial records and regulatory submissions, yet it is not possible to state which, if any, of these categories were present in the taken material.
What's at stake
Individuals named in architectural or planning documents may face risks of identity misuse or unwanted contact if their details appear in the exfiltrated files. The firm itself could encounter operational disruption, regulatory scrutiny and costs associated with investigation and remediation. Because the extent of the data remains unknown, the precise consequences for any one person cannot yet be assessed.
Were you affected?
Anyone who has corresponded with C2O Architects or been a party to its projects may wish to monitor their email accounts and credit files for unusual activity. Running a free exposure scan of an email address against known breach repositories can indicate whether the address has appeared in previously published data sets. Organisations should also review any correspondence received from the firm regarding the incident.
AICompiled with AI assistance from public sources and published under our editorial standards.
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Publicly posted by thegentlemen — unverified claim, pending independent verification
Breach listings — particularly those originating from ransomware or leak sites — are third-party claims that may be unverified, incomplete, or inaccurate. A listing does not by itself confirm that a breach occurred or that any specific data was exposed. Severity is an automated assessment, not a definitive rating. Verification status is shown where available.
Attributions to threat groups and methods reflect public reporting and, in some cases, unverified claims made by the groups themselves; they may be incomplete or later revised. Recent Breaches and GalaxyWarden are independent and are not affiliated with, and do not endorse, any company or group named on this page. This information is aggregated from public sources for awareness only and is not legal, security, or investment advice.