One linked filing — more sources may join as they report · filed Mar 2, 2026. View entity profile → Other incidents for this victim →
incident inc_affdcbaa121b47f6 · 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
Feb 1, 2023
When the intrusion reportedly occurred, per the linked filings
TriCo Bancshares' 2025 10-K Item 1C references a February 2023 criminal cyberattack that caused temporary interruption of company systems, disclosure of certain confidential information, and resulted in litigation and governmental inquiries, the consequences of which may be material. No specific attack vector, affected-individual count, or data types are enumerated in the Item 1C disclosure.
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.