Clustered 4 filings across 4 jurisdictions · filing window Jun 23, 2025 → Jun 30, 2025. View entity profile → Other incidents for this victim →
incident inc_42b547ea13534444 · 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.
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
Apr 10, 2024
When the intrusion reportedly occurred, per the linked filings
May 21, 2025
Reported by MAINE AG, NEW HAMPSHIRE AG, TEXAS AG filings
Mainline Health Systems Inc reported to HHS on 2025-06-23 a Hacking/IT Incident affecting 101,104 individuals. Breached information located on Network Server.
Affected (this filing): 101,104
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.
Mainline Health Systems Inc. reported a data breach affecting 101,104 individuals, including one resident of Maine. The breach, described as an external system breach (hacking), occurred on April 10, 2024, and was discovered on May 21, 2025. Affected individuals were notified on June 20, 2025, and offered 12 months of credit monitoring and identity theft protection services.
Affected (this filing): 1
Mainline Health Systems Inc reported an unauthorized access incident occurring on or about April 10, 2024, discovered on May 21, 2025. The breach impacted approximately one New Hampshire resident, exposing PII, PHI, SSNs, financial account data, and medical records. Mainline notified law enforcement, engaged cybersecurity experts, and is offering credit monitoring services. The investigation is ongoing.
Affected (this filing): 1
Mainline Health Systems Inc based in Monticello, Arkansas, a healthcare – medical provider entity reported a data breach to the Texas Attorney General. The breach was discovered on 2025-05-21 and reported on 2025-06-30. 428 Texas residents were affected. 101,104 individuals affected in total. Types of information involved: Name of individual;Address;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): 428