Data Breach Law Group Investigates the HENNESSY ADVISORS, INC Data Breach
By Data Breach Law Group | Posted on February 5, 2026 · Illinois
Miami, FL — Data Breach Law Group is investigating a data breach involving HENNESSY ADVISORS, INC, reported to the Illinois Attorney General on February 5, 2026. The firm is reviewing whether affected individuals have legal claims arising from the incident.
Hennessy Advisors, Inc. appears to be a financial services and investment management firm responsible for managing client assets and portfolios. As a financial institution, the company typically collects and maintains sensitive personal and financial data, including investment account details, tax identification numbers, and banking information required for processing transactions. This security incident was officially reported to the Illinois Attorney General in 2026, confirming that unauthorized access to certain systems occurred. If you received a data breach notification letter from the firm, it indicates that your personal information was likely contained within the impacted files. We recommend reviewing the letter carefully to understand the specific scope of the exposure and taking immediate steps to monitor your financial accounts for any suspicious activity.
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 HENNESSY ADVISORS, INC?
A case review is free and confidential. Tell us about your letter and we will explain your options.