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Leak SiteHHS OCRState AGConfirmed7 filings · 6 statesLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforcedpearhigh sensitivity
Merged incident · 7 filings

MCBS, LLC — September 2025 breach

Clustered 7 filings across 7 jurisdictions · filing window Sep 25, 2025 → Jul 1, 2026. View entity profile → Other incidents for this victim →

⚠ 2 cross-filing discrepancies →Merge100%

Determination

Confirmed

Members

7 filings

States

6

Affected · reported

1,261,464

First → last filing

Sep 25, 2025 → Jul 1, 2026

Merge confidence

100%

incident inc_3d4705cf36d84e39 · merged by deterministic · confidence 100%

Confirmed breach. Merged as one breach: 6 regulatory filings and 1 unverified claim. The filings describe unauthorized access. Intrusion Sep 22, 2025–Sep 26, 2025, discovered Sep 22, 2025 — the first regulatory filing landed 277 days later (flagged late). 1,261,464 individuals reported across the linked filings. Data reported: Government ID, PHI, Health (basic), and 3 more. Notifications rolled out on a 279-day schedule across 6 filings beginning Sep 25, 2025. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Notification delay
277days

Discovered → first regulatory filing

Discovery variance
248days

Range of discovered_at dates across filings

Leak precedence
274days before filing

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
279days

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 >180dFull clock table in Litigation Timeline

Sensitive data

identity_government

Incident timeline

Sep 22, 2025breach begins
Sep 22, 2025discovered · members disagree
notification delay · 277 days
Jun 26, 2026first filing
Jul 1, 2026most recent filing

Dashed segments are unestablished, not zero — they fill in as filings merge into this incident.

Member cascade — every filing about this breach

  1. SEP 25Leak sitepear postfirst filing · attacker claim · unverifiedday 0
  2. JUN 26CA AGCA AG noticeno count stated+274d
  3. JUN 26HHS OCRHHS OCR noticestates nationwide total 1,261,464+274d
  4. JUN 29NH AGNH AG notice135 NH residents+277d
  5. JUN 30TX AGTX AG noticestates nationwide total 1,241,154+278d
  6. JUL 1SC AGSC AG notice301,809 SC residents+279d
  7. JUL 1IL AGIL AG noticemost recent · no count stated+279d
  8. Watching for additional filings — new sources merge into this incident automatically.

Roll-up facts — reconciled across members

Breach window
Sep 22, 2025 – Sep 26, 2025
CA AG
Discovered
Sep 22, 2025IL AGSep 25, 2025CA AG + NH AG + SC AGMay 28, 2026TX AGfilings disagree on discovery
Data types
Financial account · Health (basic) · Identity (basic) · Government ID · PHI · PII
CA AG + HHS OCR + NH AG +3
Attack vector
Unauthorized Access
HHS OCR

Each fact cites the member filing that establishes it; when filings conflict, every value shows with its source.

Count reconciliation

per-state reported counts

Nationwide (stated in a filing)

1,261,464

Sum of filed state slices

315,246· 25.0% of stated

75% of the stated total lives in states whose filings carry no count — the dashed share shrinks as filings land.

US1,261,464
SC301,809
TX13,302
NH135

State AGs report only their own residents; teal bars show each state's reported slice. The gray US row is the nationwide total reported in a linked filing.

Evidence ladder — rungs this incident occupies

Leak-site claim1 member

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

No press coverage linked yet.

State AG / regulator filing6 members

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

No SEC filing or victim statement yet.

Merge provenance

Method
deterministic
Confidence
1.00 · above the 0.85 auto-merge floor
Reviewed
operator-reviewed Aug 9, 2026 · at least one link edge was human-adjudicated
Audit
Every link edge records its method, confidence and model + prompt versions (100% is the strongest edge).

Merges are reversible — a wrong link can be detached with its audit trail intact. How merging works.

Filing velocity

Spread

279 days

Cadence

~1 / 46.5d

vs. multi-state median

34.9× slower

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. This page states only what the linked filings agree on; each filing's own account stays on its own record, linked from the timeline below.

The weekly clock on records like this one

The Disclosure Clock is a weekly briefing on what landed in the disclosure record, and the gap between the criminals' post and the regulator's filing — measured on the whole record, with the method shown.

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