🏛️Massachusetts State AG
Clustered 6 filings across 6 jurisdictions · filing window May 1, 2026 → May 6, 2026. View entity profile → Other incidents for this victim →
incident inc_76da40c7e1ca44c7 · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
Identity (basic) · Government ID
Time between earliest and latest filing
Not recorded for this incident
Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.
CA IN MA ME NH VT
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Jan 9, 2026
When the intrusion reportedly occurred, per the linked filings
Jan 9, 2026
Reported by CALIFORNIA AG, NEW HAMPSHIRE AG filings
Apr 6, 2026
Reported by MAINE AG filing
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.
Horizon Media notified Massachusetts residents of a cybersecurity incident involving unauthorized access to personal information. The company engaged federal law enforcement, cooperated with the investigation, and offered 24 months of complimentary credit monitoring and identity restoration services through Experian. The scope of affected individuals was not explicitly quantified in this notice.
Horizon Media reported a data breach to the Vermont Attorney General. The breach was reported to the AGO on 2026-05-06. The reporting organization type is Other Commercial. 10 Vermont residents were affected. Categories of data breached: Social Security Numbers, Government ID Numbers, Health Records.
Horizon Media disclosed that on January 9, 2026, an unauthorized actor gained access to a limited portion of its systems via a sophisticated social engineering event. The actor copied certain files from file shares. The investigation determined that name and other personal information may have been accessed. Horizon contained the incident, notified federal law enforcement, and is offering 24 months of credit monitoring to affected individuals.
Horizon Media, a New York-based commercial entity, reported to the Maine Attorney General that an external system breach (hacking) occurred on or about January 9, 2026 and was discovered on April 6, 2026. One Maine resident was affected; the total number of persons affected was not disclosed in the Maine AG submission. The notice did not enumerate specific data elements acquired. Written notifications were sent on May 6, 2026, and 24 months of Experian IdentityWorks identity theft protection were offered.
Horizon Media reported a data breach to the Indiana Attorney General. The breach occurred on 2026-01-09 and was reported on 2026-05-06. 15 Indiana residents were affected.
Affected (this filing): 15
Horizon Media notified the New Hampshire Attorney General on May 6, 2026, of a data event affecting 7 New Hampshire residents. The incident, discovered on January 9, 2026, involved unauthorized access via a sophisticated social engineering event (phishing). The attacker accessed file shares and copied files containing names, Social Security numbers, and passport numbers. Horizon notified federal law enforcement, provided 24 months of credit monitoring via Experian, and issued notices to affected individuals and credit bureaus.
Affected (this filing): 7