HackingPIIIdentity (basic)LowContained

HENNESSY ADVISORS, INC.

bd_f68cb883eed2da89 · schema v1 · pii pii-v2

Severity

Low

Discovered

Mar 30, 2025

Filed

Feb 23, 2026

To disclose

—

Affected

Not disclosed

Linked

9 filings

Confidence

66%

Full breach record for HENNESSY ADVISORS, INC. →

Hennessy Advisors, Inc. notified Nebraska residents of a data security incident discovered on March 30, 2025. Unauthorized access to investor systems occurred, with personal information accessed and released in late December 2025. Notices were sent on February 23, 2026, offering credit monitoring and identity theft protection services.

J jump to incidentP pin to compareR raw source

Incident timeline

Mar 30, 2025

Discovered

Feb 23, 2026

Filed

This filing is one of 9 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (8) · sorted by filing gap

Indiana State AGbd_155d62cf979564682026-02-23Candidate
Vermont State AGbd_d11bdc84764407482026-02-23Verified
California State AGbd_072c9ab8534cfc812026-02-24 · +1dVerified
Maine State AGbd_41991ab4574f8c982026-02-24 · +1dVerified by operator

Show 4 more filings ↓up to 22d gap

Massachusetts State AGbd_4cad2bf43441a73a2026-02-24 · +1dVerified
New Hampshire State AGbd_6d4e4e25f72021c32026-02-24 · +1dVerified
Texas State AGbd_4a3d6923a18d23b52026-02-25 · +2dVerified by operator
Illinois State AGbd_ffe201debd927b8a2026-02-01 · +22dVerified

Name: HENNESSY ADVISORS, INC.
norm: hennessy advisors
Domain: hennessyadvisors.com

Name: HENNESSY ADVISORS, INC.
norm: hennessy advisors
Domain: hennessyadvisors.com

Discovered: Mar 30, 2025
Materiality determined: —
Notification sent: Feb 23, 2026
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Retained third-party specialists to determine what happened and to secure our systems and data
Offering identity theft protection services through IDX
Offering credit and CyberScan monitoring
Offering a $1,000,000 insurance reimbursement policy
Offering fully managed id theft recovery services
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 9 filings · 9 states

View merged incident ↗

Illinois State AGFeb 1 · first

Indiana State AG+22d

Vermont State AG+22d

Nebraska State AG+22d · this page

California State AG+23d

Maine State AG+23d

Massachusetts State AG+23d

New Hampshire State AG+23d

Texas State AG+24d

Pattern: first filing Feb 1 (IL), last Feb 25 (TX) — a 24-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://nebraska.gov/ago/data-breach/documents/190c6508-89cc-4b3c-bac6-3f59f8936462.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 23, 2026
Raw hash: 2cffc99920e9b7a15f1e0c9300325a48a161a14172ba3197ef06395a4018cd65

Linked disclosures

Regulatory filings (8) · sorted by filing gap

Reporting entityHENNESSY ADVISORS, INC.

Victim entityHENNESSY ADVISORS, INC.

Incidentdiscovered Mar 30, 2025

Stated responseRetained third-party specialists to determine what happened and to secure our systems and data

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov