Clustered 2 filings across 2 jurisdictions · filed Aug 20, 2018. View entity profile → Other incidents for this victim →
incident inc_c820e1d3bc704e20 · merge_method deterministic · confidence 100%
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
Mar 2, 2018
When the intrusion reportedly occurred, per the linked filings
Bank of the West reported a data breach to the Montana Attorney General. The breach was reported on 2018-08-20. The breach occurred from 3/2/2018 to 3/19/2018. 4 Montana residents were affected.
Affected (this filing): 4
Bank of the West notified customers of a third-party data breach in which unauthorized parties used compromised credentials to access employee email accounts at a contracted business data analysis service provider. The incident, which occurred on March 2, 2018, potentially exposed business customer names and business identification numbers (which may include Social Security numbers). Bank of the West offered one year of free Identity Guard® credit monitoring services 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.