Highmark Inc — December 2022 breach

Clustered 9 filings across 8 jurisdictions · filing window Feb 3, 2023 → Jun 26, 2023. View entity profile → Other incidents for this victim →

⚠ 1 cross-filing discrepancy →Merge100%

Determination

Confirmed

Members

9 filings

States

Affected · reported

300,000

First → last filing

Feb 3, 2023 → Jun 26, 2023

Merge confidence

100%

incident inc_0a1247e8b8654c3b · merged by deterministic · confidence 100%

Confirmed breach. Merged as one breach: 9 regulatory filings. Intrusion Dec 13, 2022–Dec 15, 2022, discovered Dec 15, 2022 — the first regulatory filing landed 50 days later. 300,000 individuals reported across the linked filings. Data reported: Government ID, PHI, Identity (basic), and 4 more. Notifications rolled out on a 143-day schedule across 9 filings beginning Feb 3, 2023. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Supplemental

Notification delay

50days

Discovered → first regulatory filing

Discovery variance

0days

Range of discovered_at dates across filings

Filing span

143days

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.

Regulatory clocksMaine⏱ ME AG >30d · 50dWashington⏱ WA AG >30dCalifornia✓ CA 60-day OK · 60dSouth Carolina✓ SC CRA notice dueHIPAA✓ HHS notifiedFull clock table in Litigation Timeline

No cross-filing comparison data available for this incident.

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