One linked filing — more sources may join as they report · filed Feb 27, 2024. View entity profile → Other incidents for this victim →
incident inc_9fbbe6eb8fa84bde · 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; needs two dated filings.
FEDERAL
all SEC 10-K Item 1C
Earliest sighting first · deep chronology in Litigation Timeline
Northern Trust Corporation (CIK 0000073124) Annual Report on Form 10-K for fiscal year ended December 31, 2023. This document is a structured XBRL financial filing and does not contain a discrete cybersecurity incident disclosure narrative. No breach or cybersecurity incident details are described in the source body provided.
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.