California State AG
Clustered 4 filings across 3 jurisdictions · filing window Jan 6, 2022 → Apr 27, 2022. View entity profile → Other incidents for this victim →
incident inc_35e1f8c41b0f49fa · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
CA DE 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
Earliest sighting first · deep chronology in Litigation Timeline
Jul 14, 2021 → Aug 27, 2021
When the intrusion reportedly occurred, per the linked filings
Sep 1, 2021
Reported by CALIFORNIA AG, DELAWARE AG filings
Advent Health Partners detected suspicious activity on employee email accounts in early September 2021. The unauthorized third party potentially accessed files containing names and other PII of individuals associated with a client hospital group. The breach window is listed as July 14 to August 27, 2021. Advent Health Partners launched an investigation, implemented additional cybersecurity measures, and offered 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.
Advent Health Partners, Inc. notified the California AG of a breach involving unauthorized access to employee email accounts in September 2021. The incident potentially exposed names and PII of individuals associated with client health insurance communications. The company offered TransUnion credit monitoring and enhanced cybersecurity measures.
Advent Health Partners reported a data breach to the Montana Attorney General. The breach was reported on 2022-01-06. The breach occurred from 9/1/2021 to 9/30/2021. 6 Montana residents were affected.
Affected (this filing): 6
Advent Health Partners, Inc. notified affected individuals in multiple states (including DE, MD, NY, DC, NC, NM, RI) of a security incident occurring between July 14, 2021, and August 27, 2021. Unauthorized third parties accessed employee email accounts containing limited datasets provided by clients for routine operations with health insurance companies. The accessed information included names and other PII. No evidence of misuse was found. The company offered 12 months of credit monitoring via TransUnion.