One linked filing — more sources may join as they report · filed Feb 26, 2026. View entity profile → Other incidents for this victim →
incident inc_51fe925fd996400d · 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
ARCH CAPITAL (2025 10-K Item 1C) discloses no material cybersecurity incidents. The company describes its cybersecurity risk management framework, including Board oversight, third-party vendor assessments, and employee training. It explicitly states that no previous incidents have materially affected the Company.
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.