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Case File: Stark Bancshares dba Grand Missouri Bank Data Breach

This file collects the dated facts on record for the Stark Bancshares dba Grand Missouri Bank incident. The state report is dated December 30, 2025. The incident itself is dated October 21, 2025.

Timeline

70 days separate the incident date from the date it was reported.

  1. October 21, 2025Incident dateWhen the filing says the breach took place.
  2. December 30, 2025Report filed in IndianaDate the notice was lodged with the Indiana Attorney General.

Case facts

Filing state
Indiana
Date reported
December 30, 2025
Incident date
October 21, 2025
Receiving office
Indiana Attorney General

Case notes

Stark Bancshares, doing business as Grand Missouri Bank, submitted a data breach notification to regulators in Indiana on December 30, 2025. This report details an event that was identified on October 21, 2025, affecting an unspecified number of individuals.

While the precise categories of information involved in this incident were not specified in the public filing, the notification indicates that personal information belonging to individuals was exposed. Public records do not elaborate on the specific types of data affected.

Grand Missouri Bank confirmed that an investigation into the breach is currently underway. The purpose of these public filings is to inform potentially affected individuals and the public about the incident as mandated by state regulations.

Individuals who receive direct notification from Stark Bancshares dba Grand Missouri Bank should review the guidance provided in that communication. It is generally advisable for anyone concerned about their data to remain vigilant, monitor their financial accounts for suspicious activity, and consider changing passwords for critical online services. Being cautious of unsolicited communications is also a recommended precaution.

This public record serves as a factual account of the reported incident, providing details as they are made available by the filing entity.

Questions about this case file

Where does the Stark Bancshares dba Grand Missouri Bank case file come from?
Every entry is taken from the breach report Stark Bancshares dba Grand Missouri Bank lodged with the Indiana Attorney General. Nothing here is estimated.
Why do the incident date and the report date differ?
Companies usually investigate before they report. The gap between the two dates shows how long that took.
What does the records-affected figure count?
It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.
Does this case file change over time?
Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

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Filing source: Indiana Attorney General