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State AGConfirmed1 filing · 1 stateLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforcedhigh sensitivity
Incident · single filing

ARTHUR J. GALLAGHER & CO. — June 2020 breach

One linked filing — more sources may join as they report · filed Sep 29, 2021. View entity profile → Other incidents for this victim →

Determination

Confirmed

Members

1 filing

States

1

Affected · reported

813,120

First → last filing

Sep 29, 2021

incident inc_dcead7955b0e49a7 · merged by deterministic

Confirmed breach. Intrusion Jun 3, 2020, discovered Jun 23, 2021 — the first regulatory filing landed 98 days later (flagged late). 813,120 individuals reported across the linked filings.

Litigation Timing

Notification delay
98days

Discovered → first regulatory filing

Not recorded for this incident

Discovery variance · Leak precedence · Materiality delta · SEC filing delay · Filing span — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.

Regulatory clocksMaine✗ ME AG >90d · 98dFull clock table in Litigation Timeline

Sensitive data

financial_credentials

Incident timeline

Jun 3, 2020breach begins
Jun 23, 2021discovered
notification delay · 98 days
Sep 29, 2021first & only filing
—watching for filings

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

Member cascade — every filing about this breach

  1. SEP 29ME AGME AG noticeonly filing · states nationwide total 813,120day 0
  2. Watching for additional filings — new sources merge into this incident automatically.

Roll-up facts — reconciled across members

Breach window
Jun 3, 2020
ME AG
Discovered
Jun 23, 2021· 385d undetected
ME AG
Data types
Identity (basic) · Financial account · Financial credentials
ME AG
Attack vector
Unauthorized Access
ME AG

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)

813,120

Sum of filed state slices

497· 0.1% of stated

100% of the stated total lives in states whose filings carry no count — the dashed share shrinks as filings land.

Evidence ladder — rungs this incident occupies

Leak-site claim

No leak-site claim on record for this incident.

Press / market report

No press coverage linked yet.

State AG / regulator filing1 member

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

SEC 8-K / victim statement

No SEC filing or victim statement yet.

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. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.