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Leak SiteState AGConfirmed4 filings · 3 statesLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforcedcl0phigh sensitivity
Merged incident · 4 filings

Madison Square Garden Entertainment Corp. — August 2025 breach

Clustered 4 filings across 4 jurisdictions · filing window Aug 20, 2025 → Feb 26, 2026. View entity profile → Other incidents for this victim →

⚠ 2 cross-filing discrepancies →Merge100%

Determination

Confirmed

Members

4 filings

States

3

Affected · reported

13

First → last filing

Aug 20, 2025 → Feb 26, 2026

Merge confidence

100%

incident inc_cc97934b8ddc467b · merged by human · confidence 100%

Confirmed breach. Merged as one breach: 3 regulatory filings and 1 unverified claim. The filing describes a third-party compromise. Intrusion Aug 10, 2025–Oct 21, 2025, discovered Nov 30, 2025. 13 individuals reported across the linked filings. Data reported: Government ID and Identity (basic). Notifications rolled out on a 190-day schedule across 3 filings beginning Aug 20, 2025. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Supplemental
Discovery variance
16days

Range of discovered_at dates across filings

Leak precedence
Noneclaim trailed by 93d

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
190days

Time between earliest and latest filing

Not recorded for this incident

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

Regulatory clocksLeak gap⏱ Leak >30dMaine⏱ ME AG >30d · 88dMassachusetts✓ MA credit monitoring dueFull clock table in Litigation Timeline

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Madison Square Garden Entertainment Corp. data breach (2025) · DisclosureLens