Horicon Bank — May 2021 breach

Clustered 4 filings across 4 jurisdictions · filing window Nov 15, 2021 → Nov 22, 2021. View entity profile → Other incidents for this victim →

⚠ 2 cross-filing discrepancies →Merge100%

Determination

Confirmed

Members

4 filings

States

Affected · reported

30,394

First → last filing

Nov 15, 2021 → Nov 22, 2021

Merge confidence

100%

incident inc_8390d0c2893a4c15 · merged by deterministic · confidence 100%

Confirmed breach. Merged as one breach: 4 regulatory filings. Intrusion May 19, 2021–Sep 20, 2021, discovered May 20, 2021 — the first regulatory filing landed 179 days later (flagged late). 30,394 individuals reported across the linked filings. Data reported: Government ID, PII, Identity (basic), and 1 more. Notifications rolled out on a 7-day schedule across 4 filings beginning Nov 15, 2021. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Notification delay

179days

Discovered → first regulatory filing

Discovery variance

123days

Range of discovered_at dates across filings

Filing span

7days

Time between earliest and latest filing

Not recorded for this incident

Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.

Regulatory clocksMaine✗ ME AG >90d · 180dMassachusetts✓ MA credit monitoring dueFull clock table in Litigation Timeline

No cross-filing comparison data available for this incident.

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