One linked filing — more sources may join as they report · filed Jun 2, 2021. View entity profile → Other incidents for this victim →
incident inc_91707ddba80a4cf3 · 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; no SEC 8-K in this cluster; needs two dated filings.
Government ID · Identity (basic)
ME
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Feb 25, 2021 → Mar 17, 2021
When the intrusion reportedly occurred, per the linked filings
May 4, 2021
Reported by MAINE AG filing
21c Museum Hotels reported an external system breach (hacking) occurring between Feb 25 and Mar 17, 2021, discovered on May 4, 2021. The incident affected 2,333 individuals, including 1 Maine resident. Compromised data included names and Social Security Numbers. The company provided 24 months of credit monitoring and identity theft restoration services via Kroll.
Affected (this filing): 2,333
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.