One linked filing — more sources may join as they report · filed Feb 1, 2013. View entity profile → Other incidents for this victim →
incident inc_ccce423719af499d · merge_method deterministic
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.
PII · Identity (basic)
CA
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Jan 18, 2013
When the intrusion reportedly occurred, per the linked filings
Antioch Unified School District reported a data breach affecting employees on January 18, 2013. The incident involved the unauthorized access of employee personal information. The district notified the California Attorney General and offered one year of free credit monitoring membership to affected employees. The specific attack vector and number of individuals affected were not disclosed in the summary record.
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.