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MEDIUM severityConfirmedHow we verify

Hamilton Construction Data Breach Notice (Montana Attorney General): What Was Exposed & What To Do

RBRecent Breaches Breach Intelligence·November 12, 2025
Hamilton Construction Data Breach Notice (Montana Attorney General)

Occurred June 19, 2025 · publicly disclosed November 12, 2025. Approximately 21 people affected.

MEDIUM
Severity
21
People affected
1
Data types exposed
November 12, 2025
Disclosed
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The Hamilton Construction Data Breach Notice (Montana Attorney General) (reported November 12, 2025) exposed Personal information (per the breach notification) belonging to roughly 21 people. If you have an account with them, your information may now be circulating on the open web and with data brokers. Here’s exactly what happened, how to check if you were affected, and what to do next.

Severity & verification
MEDIUM severityConfirmed
Data types not itemised.
Corroborated by an official disclosure or a verified breach feed.
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Recent Breaches is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data, and we do not hold the data claimed in leak-site listings. Incidents are compiled from publicly accessible sources and threat-intelligence platforms and are reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — write to support@galaxywarden.com or press@recentbreaches.com.
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How this breach connects

Company

CompanyHamilton Construction security record
70/100
DoxxScan™ · Moderate doxx risk
C+ 72Fair record

2 reported incidents on record.

See Hamilton Construction’s full breach history →
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Read GalaxyWarden’s full analysis of the Hamilton Construction Data Breach Notice (Montana Attorney General) →

Source: Montana Department of Justice breach notification

Verified breach

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.

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