This document is a Citigroup Inc. 10-K filing (CIK 0000831001) for fiscal year ending December 31, 2024. The source body provided consists entirely of XBRL metadata, context definitions, and financial taxonomy markup with no narrative breach disclosure content. No cybersecurity incident or data breach is described in the available document text.
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.