Clark & Sullivan Constructors Listed by play Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
Clark & Sullivan Constructors was listed by the play ransomware group on November 21, 2025, after internal files were exfiltrated in a ransomware attack. An undisclosed number of people may be affected; anyone connected to the firm should check their status and take protective steps.
Inside the incident
The only confirmed detail is the group’s public claim of having obtained internal files. No timeline for the intrusion, method of initial access, or confirmation of encryption has been disclosed. The number of people whose information may be involved remains unknown, and the company has not issued a public statement on the matter.
Inside play
Play is a ransomware operation that has been publicly active since at least 2023. The group typically uses double-extortion tactics, encrypting systems and threatening to publish stolen data if a ransom is not paid. It maintains a leak site where it lists claimed victims, often without providing independent verification of the claims. Public reporting has associated the group with intrusions into organizations across multiple sectors, primarily in North America and Europe.
About Clark & Sullivan Constructors
Clark & Sullivan Constructors operates in the construction sector. Companies of this type routinely maintain records related to employees, subcontractors, project documentation, financial transactions, and client communications. A successful intrusion into such an organization can expose operational and personal information that is not normally available to the public.
What was likely exposed
The listing refers only to “internal files exfiltrated in ransomware attack.” No further breakdown of file contents or data categories has been provided. Construction firms commonly store employee records, vendor details, contract information, and project-related correspondence, but the exact material taken in this case has not been confirmed.
Why it matters
Exposure of internal files can create long-term risks for individuals whose personal or employment information appears in those records. For the organization, the incident adds operational disruption and potential regulatory obligations under applicable data-protection rules. Because the scale remains undisclosed, the full scope of consequences cannot yet be assessed.
If your data was in this claimed breach
Monitor accounts for unusual activity and consider placing fraud alerts with credit agencies if employment or financial documents were among the files. Individuals can run a free exposure scan of their email address against known breach data to check for prior appearances in public listings.
AICompiled with AI assistance from public sources and published under our editorial standards.
How this breach connects
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Publicly posted by play — 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.