Confirmed breach. Intrusion Mar 26, 2024, discovered May 8, 2024 — the first regulatory filing landed 216 days later. 1 individuals reported across the linked filings.
Discovery variance · Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.
State AGConfirmedLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforced
Affected (total reported)
1
Data types
—
Jurisdictions
2
MT NH
Linked filings
2
all State AG
Timeline
Earliest sighting first · deep chronology in Litigation Timeline
Breach window
Mar 26, 2024
When the intrusion reportedly occurred, per the linked filings
43 days
Breach discoveredletter-grounded
May 8, 2024
Reported by NEW HAMPSHIRE AG filing
216 days
⛰️New Hampshire State AGFirst filinglinked via multistate filing link · 100%
Costello, Cooney & Fearon, PLLC notified the NH Attorney General of a data security incident. Unauthorized access occurred on March 26, 2024, detected on May 8, 2024. One NH resident's personal information was impacted. The firm engaged forensic experts, notified the FBI, and offered credit monitoring services.
Costello, Cooney & Fearon, PLLC reported a data breach to the Montana Attorney General. The breach was reported on 2024-12-10. The breach occurred from 03/26/2024 to 05/08/2024. 1 Montana residents were affected.
Affected (this filing): 1
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.