atchadwick.net Listed by incransom Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
atchadwick.net was listed by the incransom ransomware group on 4 January 2026 after internal files were exfiltrated in a ransomware attack, with the exact date of the intrusion still unknown. Users of the site are advised to check whether their information was exposed and to follow any security guidance issued by the organisation.
A ransomware group known as incransom has listed atchadwick.net on its leak site, claiming to have carried out an attack that resulted in the exfiltration of internal files. The listing was reported on January 4, 2026. No information has been released on the number of individuals affected or the precise volume of data involved.
Incidents of this type are part of a broader pattern in which ransomware operators publicize claimed breaches to increase pressure on targeted organizations. The absence of Reported Details on scale or impact leaves the full consequences unclear at this stage.
Inside the incident
The only confirmed public information is the leak-site listing itself and the statement that internal files were allegedly exfiltrated during a ransomware attack. No dates for the intrusion, no count of files or records, and no description of the encryption or exfiltration methods have been disclosed. The number of people whose information may be involved remains unknown.
The group behind it: incransom
IncRansom is a ransomware operator that maintains a public leak site where it lists organizations it claims to have targeted. The group typically follows the pattern of encrypting systems, removing copies of data, and then using the site to publish samples or file listings in an effort to prompt payment. Its listings represent the group’s assertions rather than independently verified events.
Who is atchadwick.net?
A.T. Chadwick, operating as atchadwick.net, is a mechanical contracting firm established in 1966 and based in Bensalem, Pennsylvania. The company provides services in plumbing, heating, air-conditioning, refrigeration, process piping, and field management. It employs approximately 500 people and reports annual revenue of $159.1 million within the construction-management sector.
What was likely exposed
The listing states that internal files were exfiltrated. No further inventory of data types has been published. Organizations in mechanical contracting routinely hold employee records, client contracts, project specifications, financial documents, and vendor information; however, the exact contents of the exfiltrated material have not been confirmed.
Why it matters
Exposure of internal files from a firm handling construction projects can create operational and competitive risks for the organization and may affect individuals whose personal or employment information appears in those files. Because the volume and sensitivity of the data remain undisclosed, the practical consequences for any specific person cannot yet be assessed.
If your data was in this claimed breach
Monitor accounts for unusual activity and consider changing passwords for any services associated with the company. Enable multi-factor authentication where available. Individuals can check their email addresses against public breach databases through free exposure-scan tools to determine whether their information has appeared in known data sets.
AICompiled with AI assistance from public sources and published under our editorial standards.
How this breach connects
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Publicly posted by incransom — 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.