Clustered 2 filings across 2 jurisdictions · filed Jun 24, 2021. View entity profile → Other incidents for this victim →
incident inc_be37e0865e104238 · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Time between earliest and latest filing
Not recorded for this incident
Discovery variance · Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.
CA MT
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Dec 23, 2020
When the intrusion reportedly occurred, per the linked filings
Jan 27, 2021
Reported by CALIFORNIA AG filing
Highmark Inc. reported a data breach to the Montana Attorney General. The breach was reported on 2021-06-24. The breach occurred from 12/23/2020 to 6/27/2021. 63 Montana residents were affected.
Affected (this filing): 63
Highmark Inc. reported a data breach involving unauthorized access to a MultiPlan employee's email account. The incident, occurring between Dec 23, 2020, and Jan 27, 2021, exposed customer PII including names, SSNs, and financial account numbers. Highmark engaged forensic experts, notified law enforcement, and provided two years of credit monitoring to affected individuals.
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.