Clustered 2 filings across 2 jurisdictions · filed May 21, 2021. View entity profile → Other incidents for this victim →
incident inc_f13ccf476a9443a1 · merge_method llm · confidence 44%
Discovered → first regulatory filing
Time between earliest and latest filing
Not recorded for this incident
Discovery variance · Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.
Government ID
ME MT
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Dec 24, 2020
When the intrusion reportedly occurred, per the linked filings
May 21, 2021
Reported by MAINE AG filing
Cornerstone Building Brands experienced an external system breach (hacking) on December 24, 2020, which was discovered on May 21, 2021. The breach affected one Maine resident, whose name and Social Security Number were compromised. The company offered one year of credit monitoring and identity theft protection services through Kroll.
Affected (this filing): 1
Cornerstone Building Brands reported a data breach to the Montana Attorney General. The breach was reported on 2021-05-21. The breach occurred from 11/30/2020 to 12/24/2020. 1 Montana residents were affected.
Affected (this filing): 1
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.