Massachusetts Mutual Life Insurance Company — October 2024 breach

Clustered 3 filings across 3 jurisdictions · filing window Dec 4, 2025 → Dec 11, 2025. View entity profile → Other incidents for this victim →

⚠ 1 cross-filing discrepancy →Merge100%

Determination

Confirmed

Members

3 filings

States

Affected · reported

272

First → last filing

Dec 4, 2025 → Dec 11, 2025

Merge confidence

100%

incident inc_3682230d47c44048 · merged by deterministic · confidence 100%

Confirmed breach. Merged as one breach: 3 regulatory filings. The filing describes a third-party compromise. Intrusion Oct 21, 2024–Jan 13, 2025, discovered Jan 15, 2025 — the first regulatory filing landed 323 days later. 272 individuals reported across the linked filings. Data reported: Government ID, Health (basic), and Identity (basic). Notifications rolled out on a 7-day schedule across 3 filings beginning Dec 4, 2025. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Notification delay

323days

Discovered → first regulatory filing

Filing span

7days

Time between earliest and latest filing

Not recorded for this incident

Discovery variance · Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.

Regulatory clocksMassachusetts✓ MA credit monitoring dueFull clock table in Litigation Timeline

No cross-filing comparison data available for this incident.

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