🐻California State AGlinked via multistate filing link · 100%
Clustered 3 filings across 3 jurisdictions · filed Jun 18, 2021. View entity profile → Other incidents for this victim →
incident inc_29d3a32241494e90 · merge_method human · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
CA ME MT
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.
all State AG
per-filing reported counts
State AGs report only their own residents; bars show per-filing counts.
Earliest sighting first · deep chronology in Litigation Timeline
Nov 30, 2020
When the intrusion reportedly occurred, per the linked filings
Apr 22, 2021
Reported by CALIFORNIA AG, MAINE AG filings
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.
Prominence Health Plan notified California AG of a data breach affecting ~45,000 members. Unauthorized access occurred in Nov 2020, discovered Apr 2021. Accessed data included call recordings and claim forms containing names, DOBs, member IDs, and addresses. No SSNs or financial data accessed. FBI and regulators notified. Credit monitoring offered.
Affected (this filing): 45,000
Prominence Health Plan reported a data breach to the Montana Attorney General. The breach was reported on 2021-06-18. The breach occurred from 11/1/2020 to 4/21/2021. 14 Montana residents were affected.
Affected (this filing): 14
Prominence Health Plan reported an external system breach (hacking) that occurred on November 30, 2020, and was discovered on April 22, 2021. The incident affected 45,000 individuals. Affected individuals were notified in writing on June 21, 2021, and offered 12 months of credit monitoring and identity theft assistance services through Experian.
Affected (this filing): 45,000