Clustered 2 filings across 2 jurisdictions · filed May 9, 2019. View entity profile → Other incidents for this victim →
incident inc_24c4ae49239d4c0c · merge_method human · 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.
MT OR
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Jun 7, 2018
When the intrusion reportedly occurred, per the linked filings
Mar 27, 2019
Reported by OREGON AG filing
US Oncology Inc reported a data breach to the Montana Attorney General. The breach was reported on 2019-05-09. The breach occurred on 6/7/2018. 2 Montana residents were affected.
Affected (this filing): 2
US Oncology reported a data breach to the Oregon Attorney General. The breach was reported on 2019-05-09. The breach occurred during 6/7/2018 - 6/7/2018. The breach was discovered on 3/27/2019. 5,168 individuals were affected. Notice was sent on 5/9/2019.
Affected (this filing): 5,168
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.