Confirmed breach

Hennessy Advisors data breach

USUnited States · CA · Hennessy Advisors, Inc.

Hennessy Advisors (CA, United States) notified the Texas Attorney General, the Indiana Attorney General and the California Attorney General of a data breach on 23 February 2026. It affected 12,643 people. Exposed: Social Security numbers, Driver’s license numbers, Financial account and card details and Names. The breach began on 30 March 2025, 330 days before it was reported.

Status: Confirmed breach
People affected: 12,643 people
Reported: 23 February 2026
Breach began: 30 March 2025
Time to tell: 330 days (the median in California’s notices over the last year: 154 days)

What was exposed

Social Security numbers
Driver’s license numbers
Financial account and card details
Names

What changed since it was first reported

29 October 2026 Confirmed breach, 12,643 people (Indiana Attorney General)

What the letter says

We have not read this letter yet.

Got a letter or email about this breach? Check it is real →

Read the letter (PDF), as filed with the California Attorney General.

Sources

Official notices are read by code from the regulator’s own register. More notices to Texas, Indiana, California. · Corrections and changes

If Hennessy Advisors had your data

Look for Hennessy Advisors, Inc.’s own notice or letter: it should say what of yours was involved. Keep it.
Call your bank on the number printed on your card (never one from a message), check recent payments and ask for a new card.
An ID number cannot be changed, so lock it: a credit freeze or fraud alert in the US, a credit warning (kreditadvarsel) on borger.dk in Denmark, Cifas protective registration in the UK.
Expect scams that use your details: calls, texts or emails pretending to be Hennessy Advisors, Inc., your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

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From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.