Highmark Inc
bd_b0ec3199cadaa20c · schema v1 · pii pii-v1
Full breach record for Highmark Inc →8 incidents on fileHighmark Inc. notified California residents of a data breach involving its vendor, MultiPlan Inc. On January 27, 2021, MultiPlan identified unauthorized access to an employee's email account by an external actor. The incident occurred between December 23, 2020, and January 27, 2021. The actor's goal was to divert wire payments (Business Email Compromise). Personal information, potentially including account details, may have been accessed. MultiPlan terminated access, changed credentials, engaged forensics, and notified law enforcement. Affected individuals were offered two years of credit monitoring. MultiPlan implemented remediation measures including reinforced email authentication and phishing training.
J jump to incidentP pin to compareR raw source
Incident timeline
Dec 23, 2020
Begins
Jan 27, 2021
Discovered
Jun 24, 2021
Filed
vs. sector median
+9 wks slower
Linked disclosures
Why this link?Regulatory filings (2) · sorted by filing gap
- Montana State AGbd_a365b348cac7fe2b2021-06-24Candidate
- Indiana State AGbd_21a8a59a4c1d36b62021-06-30 · +6dVerified
Filing propagation · 3 filings · 3 states
View merged incident ↗Pattern: first filing Jun 24 (MT), last Jun 30 (IN) — a 6-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.