Grand Missouri Bank Discloses 2025 Data Security Incident

Stark Bancshares, operating as Grand Missouri Bank, submitted a data breach notification to Indiana authorities on December 30, 2025. This report details a security incident discovered earlier, on October 21, 2025, impacting systems containing personal information.

The official filing indicates that the specific nature of the security breach remains unspecified in the public record. Similarly, the categories of personal information involved in this incident have not been detailed in the regulatory filing.

If you receive a direct notification from Grand Missouri Bank, it means your data may have been accessed without authorization. The bank stated its investigation into the incident is ongoing at the time of the filing, working to understand its full scope.

To protect your information, consider regularly monitoring your financial accounts and credit reports for any unusual activity. It is also advisable to be cautious of unsolicited communications, particularly those requesting personal details, as these could be phishing attempts. Review your account statements carefully for any unauthorized transactions.