Clustered 2 filings across 2 jurisdictions · filing window May 10, 2019 → May 21, 2019. View entity profile → Other incidents for this victim →
incident inc_1dd77cab68a84dd5 · 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.
MT OR
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Mar 10, 2019
When the intrusion reportedly occurred, per the linked filings
Mar 11, 2019
Reported by OREGON AG filing
Cancer Treatment Centers of America reported a data breach to the Montana Attorney General. The breach was reported on 2019-05-10. The breach occurred from 3/10/2019 to 3/11/2019. 34 Montana residents were affected.
Affected (this filing): 34
Cancer Treatment Centers of America reported a data breach to the Oregon Attorney General. The breach was reported on 2019-05-21. The breach occurred during 3/10/2019 - 3/10/2019. The breach was discovered on 3/11/2019. 16,819 individuals were affected. Notice was sent on 5/10/2019.
Affected (this filing): 16,819
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.