Data Breach Law Group Investigates the Old National Bank (see 2025 Report for Marquis Software Solutions) Data Breach
By Data Breach Law Group | Posted on March 16, 2026 · Indiana
Miami, FL — Data Breach Law Group is investigating a data breach involving Old National Bank (see 2025 Report for Marquis Software Solutions), reported to the Indiana Attorney General on March 16, 2026. The firm is reviewing whether affected individuals have legal claims arising from the incident.
Old National Bank is a financial institution that provides a wide range of banking, lending, and wealth management services to its clients. As a result of these operations, the bank maintains sensitive personal and financial data, including government identification numbers, account details, and private contact information. In 2026, the company officially reported a data security incident to the Indiana Attorney General involving unauthorized access to its systems. If you received a data breach notification letter from the bank, it indicates that your personal information may have been involved in this incident. This notice is intended to inform you of the nature of the event and the steps the institution is taking to address the security of your data.
If you were affected
Stay alert to targeted scams
Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.
Keep your notification letter
Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.
Did you receive a letter from Old National Bank (see 2025 Report for Marquis Software Solutions)?
A case review is free and confidential. Tell us about your letter and we will explain your options.