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Leak SiteState AGConfirmed17 filings · 15 statesLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforcedshinyhuntershigh sensitivity
Merged incident · 17 filings

The Trustees of the University of Pennsylvania — August 2025 breach

Clustered 17 filings across 16 jurisdictions · filing window Dec 1, 2025 → Apr 15, 2026. View entity profile → Other incidents for this victim →

⚠ 2 cross-filing discrepancies →Merge100%

Determination

Confirmed

Members

17 filings

States

15

Affected · reported

442,500

First → last filing

Dec 1, 2025 → Apr 15, 2026

Merge confidence

100%

incident inc_9f1e9cbf120c4ee7 · merged by human · confidence 100%

Confirmed breach. Merged as one breach: 16 regulatory filings and 1 unverified claim. The filings describe hacking. Intrusion Aug 9, 2025–Oct 31, 2025, discovered Sep 29, 2025 — the first regulatory filing landed 63 days later (flagged late). 442,500 individuals reported across the linked filings. Data reported: Government ID, Identity (basic), Financial account, and 1 more. Notifications rolled out on a 135-day schedule across 16 filings beginning Dec 1, 2025. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Supplemental
Notification delay
63days

Discovered → first regulatory filing

Discovery variance
43days

Range of discovered_at dates across filings

Leak precedence
Noneclaim trailed by 65d

Days between the first leak-site claim and the first regulatory filing. Positive = the claim came first (public exposure before disclosure). Negative = the claim trailed the filing, so there was no pre-disclosure leak. Counts regulatory filings only — press coverage is not a regulatory disclosure.

Filing span
135days

Time between earliest and latest filing

Not recorded for this incident

Materiality delta · SEC filing delay — no SEC 8-K in this cluster.

Regulatory clocksWashington✗ WA AG >90dVermont✓ VT AG ≤14 bdayIowa✓ IA AG ≤5 bdaySouth Carolina✓ SC CRA notice dueMaine✓ ME AG ≤30d · 20dMassachusetts✓ MA credit monitoring dueTexas✓ TX AG ≤30dOregon✓ OR AG ≤45dFull clock table in Litigation Timeline

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The Trustees of the University of Pennsylvania data breach (2025) · DisclosureLens