Macmillan and its affiliates — June 2022 breach

Clustered 4 filings across 3 jurisdictions · filing window Dec 1, 2022 → Dec 20, 2022. View entity profile → Other incidents for this victim →

⚠ 1 cross-filing discrepancy →Merge100%

Determination

Confirmed

Members

4 filings

States

Affected · reported

19,178

First → last filing

Dec 1, 2022 → Dec 20, 2022

Merge confidence

100%

incident inc_4085766904344dee · merged by deterministic · confidence 100%

Confirmed breach. Merged as one breach: 4 regulatory filings. The filings describe a ransomware attack. Intrusion Jun 16, 2022–Jun 25, 2022, discovered Jun 25, 2022 — the first regulatory filing landed 159 days later (flagged late). 19,178 individuals reported across the linked filings. Data reported: Government ID, Identity (basic), and Financial account. Notifications rolled out on a 19-day schedule across 4 filings beginning Dec 1, 2022. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Notification delay

159days

Discovered → first regulatory filing

Discovery variance

0days

Range of discovered_at dates across filings

Filing span

19days

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 clocksCalifornia✗ CA 60-day late · 159dMassachusetts✓ MA credit monitoring dueFull clock table in Litigation Timeline

No cross-filing comparison data available for this incident.

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