One linked filing — more sources may join as they report · filed Dec 13, 2023. View entity profile → Other incidents for this victim →
incident inc_8d8638da26f547de · merge_method deterministic
Discovered → first regulatory filing
Not recorded for this incident
Discovery variance · Leak precedence · Materiality delta · SEC filing delay · Filing span — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.
PHI
CA
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Jul 31, 2023 → Aug 3, 2023
When the intrusion reportedly occurred, per the linked filings
Aug 1, 2023
Reported by CALIFORNIA AG filing
Prospect Medical Holdings, Inc. notified individuals of a data security incident where unauthorized parties accessed its IT environment between July 31 and August 3, 2023. The activity was first identified on August 1, 2023. Systems were taken offline immediately. Files containing protected health information (PHI) and personal information were accessed or acquired. A third-party forensics firm assisted in the investigation.
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.