Confirmed breach. Intrusion Mar 31, 2021, discovered Mar 31, 2021 — the first regulatory filing landed 35 days later. 333 individuals reported across the linked filings.
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.
Regulatory clocksMaine⏱ ME AG >30d · 35dFull clock table in Litigation Timeline
State AGConfirmedLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforcedhigh sensitivity
Affected (total reported)
333
Data types
3
Identity (basic) · Government ID · Financial account
Jurisdictions
1
ME
Linked filings
1
all State AG
Sensitive data
identity_government
Timeline
Earliest sighting first · deep chronology in Litigation Timeline
Breach window
Mar 31, 2021
When the intrusion reportedly occurred, per the linked filings
U.S. Bank, N.A. reported a credential stuffing incident on March 31, 2021, affecting 333 individuals, including 2 Maine residents. The breach involved financial account numbers and credit/debit card details. The bank notified affected consumers via telephone on April 2, 2021.
Affected (this filing): 333
ME AG >30d · 35d
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.