One linked filing — more sources may join as they report · filed Aug 29, 2017. View entity profile → Other incidents for this victim →
incident inc_ed4079c5d243437a · 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.
Identity (basic) · Government ID · Financial account
CA
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Aug 17, 2017
When the intrusion reportedly occurred, per the linked filings
Aug 20, 2017
Reported by CALIFORNIA AG filing
Massachusetts Mutual Life Insurance Company notified individuals of unauthorized access to business systems via compromised agent credentials. An unknown perpetrator used social engineering to reset credentials for two agents, gaining access to client PII including names, SSNs, and account numbers. MassMutual reset credentials, notified law enforcement, and offered two years of credit monitoring.
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.