GLOBALClaimed by XinglockerFirst sightinglinked via shared-victim match · 100%
Posted to leak site May 18, 2021bd_f8ace411af1e1abf
Clustered 3 filings across 3 jurisdictions · filing window May 18, 2021 → Oct 1, 2021. View entity profile → Other incidents for this victim →
incident inc_b344d52f3b5d4e4d · merge_method deterministic · confidence 100%
Gap between first leak claim and first regulatory filing
Time between earliest and latest filing
Not recorded for this incident
Discovery variance · Materiality delta · SEC filing delay — no SEC 8-K in this cluster; needs two dated filings.
IL MT
Leak Site · HHS OCR · State AG
Earliest sighting first · deep chronology in Litigation Timeline
Mar 7, 2021
When the intrusion reportedly occurred, per the linked filings
OSF HealthCare System reported a data breach to the Montana Attorney General. The breach was reported on 2021-10-01. The breach occurred from 3/7/2021 to 4/23/2021. 2 Montana residents were affected.
Affected (this filing):
OSF HealthCare System reported to HHS on 2021-10-01 a Hacking/IT Incident affecting 53907 individuals. Breached information located on Network Server.
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.
Affected (this filing): 53,907