Data Breach Blog

Data Breach

Hennessy Advisors, Inc. –What You Need to Know & What to Do Next

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Date of data breach:
February 25, 2026

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People exposed:
12643

February 26, 2026

by: Almeida Law Group

Understanding the Hennessy Advisors Data Breach

Data breaches have become a common occurrence in our increasingly digital world, affecting the privacy and security of personal information. The recent breach involving Hennessy Advisors, Inc., a financial services firm, serves as a reminder of the need to remain vigilant about our personal information and take proactive steps to protect ourselves. This incident not only compromises individual data but can also erode trust in companies responsible for safeguarding that information. Here’s what you need to know about this particular breach.

About the Company

  • Company Name: Hennessy Advisors, Inc.
  • Industry: Financial Services
  • Headquarters Address: 7250 Redwood Blvd, Suite 200, Novato, CA 94945

What Happened?

  • Breach Type: External system breach (hacking)
  • Date of Breach: March 30, 2025
  • Date Discovered: February 5, 2025
  • Date Consumers Were Notified: February 23, 2026
  • Number of People Affected: 12,643 nationwide, including 48 residents in Maine

What Information Was Involved?

The breach involved the acquisition of names or other personal identifiers in combination with sensitive data. Detailed specifics beyond this were not disclosed in the notice.

What You Should Do Next

If you believe you may be affected by this data breach, it is essential to take the following steps to protect your personal information:

  • Enroll in Credit Monitoring: Hennessy Advisors has offered 12 months of identity theft protection services through IDX, which includes single bureau monitoring. Take advantage of this service to track any unauthorized activity.
  • Place a Fraud Alert on Your Credit File: Notify one of the major credit bureaus to place a fraud alert on your credit report. This will make it harder for identity thieves to open accounts in your name.
  • Consider Freezing Your Credit: A credit freeze can prevent creditors from accessing your credit report, making it more difficult for identity thieves to impersonate you.
  • Review Your Financial Statements: Regularly check your bank, credit card, and insurance statements for any unauthorized transactions that may indicate fraudulent activity.
  • Request Your Free Credit Reports: You are entitled to one free credit report from each of the three major credit bureaus annually. Visit AnnualCreditReport.com to access your reports and ensure there are no inaccuracies or fraudulent accounts.
  • Report Suspicious Activity: If you notice any unauthorized transactions or feel your identity has been stolen, report it immediately to not only your bank but also law enforcement and the Federal Trade Commission (FTC).

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