Hamilton Construction Company experienced a data breach that started on June 19, 2025, and concluded on October 7, 2025. The company reported this incident to the Montana Department of Justice on November 12, 2025, and a data-notification-letter was issued to affected individuals on the same day. This breach is distinct from other incidents involving entities named "Hamilton."
This incident affected 21 individuals residing in Montana. The specific types of data exposed, and whether sensitive information such as SSN, medical, or financial data was involved, have not been explicitly detailed in the publicly available search results. This information would typically be found in the official data-notification-letter.
Details surrounding data breaches can emerge over time as investigations progress and companies provide more information. Official notices to affected individuals may also be delayed for various reasons.