One linked filing — more sources may join as they report · filed Mar 22, 2021. View entity profile → Other incidents for this victim →
incident inc_11d17acda35d4b41 · 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
Apr 18, 2020
When the intrusion reportedly occurred, per the linked filings
Oct 20, 2020
Reported by MAINE AG filing
Millbrook School experienced an external system breach (hacking) on April 18, 2020, discovered on October 20, 2020. The incident compromised names and Social Security Numbers of 484 individuals, including 4 Maine residents. The school provided written notification on March 22, 2021, and offered 24 months of identity theft protection services.
Affected (this filing): 484
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.