Clustered 4 filings across 4 jurisdictions · filing window Aug 1, 2025 → Aug 4, 2025. View entity profile → Other incidents for this victim →
incident inc_9a8a047b807749cd · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
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.
PII · PHI
AR ME NH TX
HHS OCR · State AG
per-filing reported counts
State AGs report only their own residents; bars show per-filing counts.
Earliest sighting first · deep chronology in Litigation Timeline
Jan 21, 2025 → Jun 2, 2025
When the intrusion reportedly occurred, per the linked filings
Jun 2, 2025
Reported by NEW HAMPSHIRE AG, MAINE AG, TEXAS AG filings
Highlands Oncology Group PA reported to HHS on 2025-08-01 a Hacking/IT Incident affecting 111,766 individuals. Breached information located on Network Server.
Affected (this filing): 111,766
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.
Highlands Oncology Group PA reported a ransomware attack discovered on June 2, 2025, affecting 5 New Hampshire residents. The attacker exploited a vendor application vulnerability between Jan 21 and June 2, 2025, encrypting files and potentially exfiltrating PHI, SSNs, and financial data. Highlands engaged forensic experts, notified law enforcement, and offered 12 months of credit monitoring.
Affected (this filing): 5
Highlands Oncology Group PA, a healthcare provider based in Springdale, AR, discovered on June 2, 2025 that it had been the victim of a cyber-attack in which an unauthorized third party accessed its network between January 21, 2025 and June 2, 2025, encrypting files and potentially exfiltrating personal and health information. Total affected individuals: 113,575 nationwide; 6 Maine residents. Experian IdentityWorks Credit 3B (12 months) offered to affected individuals.
Affected (this filing): 6
Highlands Oncology Group PA (“Highlands Oncology”) based in Springdale, Arkansas, a healthcare – medical provider entity reported a data breach to the Texas Attorney General. The breach was discovered on 2025-06-02 and reported on 2025-08-04. 504 Texas residents were affected. 113,575 individuals affected in total. Types of information involved: Name of individual;Social Security Number Information;Driver’s License number;Government-issued ID number (e.g. passport, state ID card);Financial Information (e.g. account number, credit or debit card number);Medical Information;Health Insurance Information;Date of Birth. Consumers were notified via U.S. Mail.
Affected (this filing): 504