One linked filing — more sources may join as they report · filed Feb 29, 2024. View entity profile → Other incidents for this victim →
incident inc_d01f16779c06470a · merge_method deterministic
Discovered → first regulatory filing
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
Oct 1, 2021
When the intrusion reportedly occurred, per the linked filings
Oct 1, 2021
Reported by SEC 10-K Item 1C filing
Sinclair's 10-K Item 1C cybersecurity disclosure references a ransomware attack in October 2021 that had a material adverse impact on the company's business strategy, results of operations, or financial condition. The filing describes the company's ongoing cyber risk management program but does not disclose affected-individual counts, threat-actor attribution, or financial impact figures for the 2021 incident.
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.