Where does the Hennessy Advisors, Inc. case file come from?

Every entry is taken from the breach report Hennessy Advisors, Inc. lodged with the California 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.

Case file

Case File: Hennessy Advisors, Inc. Data Breach

This file collects the dated facts on record for the Hennessy Advisors, Inc. incident. The state report is dated February 24, 2026. The incident itself is dated March 30, 2025.

Timeline

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

March 30, 2025Incident dateWhen the filing says the breach took place.
February 24, 2026Report filed in CaliforniaDate the notice was lodged with the California Attorney General.

Case facts

Filing state: California
Date reported: February 24, 2026
Incident date: March 30, 2025
Receiving office: California Attorney General

Case notes

Hennessy Advisors, Inc., a California-based entity, has submitted a formal notification to regulatory bodies concerning a data security incident. This filing acknowledges that personal information may have been compromised as a result of the event.

According to the public record, the exact nature of the security incident and the specific categories of personal information that may have been involved are not detailed. The official filing also does not specify the number of individuals potentially affected by this event.

The reported date of the data breach incident is March 30, 2025. Hennessy Advisors, Inc. filed its official report regarding this event on February 24, 2026. The company indicates that an investigation into the circumstances surrounding the breach is ongoing.

Individuals who receive direct notifications from Hennessy Advisors, Inc. should review them carefully for any specific guidance provided. As a general precaution, it is advisable to remain vigilant against unsolicited communications, such as phishing attempts, and to regularly monitor personal accounts for any unusual activity. Checking credit reports periodically can also help detect potential misuse of personal information.

This documentation of the Hennessy Advisors, Inc. data breach is based solely on information available in public regulatory filings. DataBreachCaseFile.com serves as a registry to present these reported facts as they are made available by the filing entity.

Questions about this case file

Where does the Hennessy Advisors, Inc. case file come from?: Every entry is taken from the breach report Hennessy Advisors, Inc. lodged with the California 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.

California data breaches

Filing source: California Attorney General

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Timeline

Case facts

Case notes

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