Clustered 8 filings across 6 jurisdictions · filing window Dec 31, 2024 → Apr 30, 2025. View entity profile → Other incidents for this victim →
incident inc_811fda745c0d4c26 · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
Identity (basic) · Government ID · Financial account
Time between earliest and latest filing
Not recorded for this incident
Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.
CA IN ME MT NH VT
all State AG
per-filing reported counts
State AGs report only their own residents; bars show per-filing counts.
Earliest sighting first · deep chronology in Litigation Timeline
8 filings across 6 jurisdictions · Dec 31, 2024 – Apr 30, 2025 · 3 milestones
May 28, 2024 → May 29, 2024
When the intrusion reportedly occurred, per the linked filings
May 29, 2024
Reported by NEW HAMPSHIRE AG, VERMONT AG, CALIFORNIA AG filings
Nov 19, 2024
Reported by MAINE AG filing
Thompson Coburn LLP notified New Hampshire AG of unauthorized access to client data between May 28-29, 2024. Suspicious activity detected May 29. One NH resident affected. Name and basic PII exposed. Response included forensic investigation, law enforcement notification, credit monitoring via Equifax, and security policy reviews.
Affected (this filing): 1
Thompson Coburn LLP notified consumers of a data breach where unauthorized actors accessed files containing names, government IDs, and financial account numbers between May 28-29, 2024. The firm engaged forensic specialists, reviewed affected files, and offered credit monitoring services.
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.
Thompson Coburn LLP reported a data breach to the Montana Attorney General. The breach was reported on 2025-04-30. The breach occurred from 05/28/2025 to 05/29/2025. 45 Montana residents were affected.
Affected (this filing): 45
Thompson Coburn LLP reported a data breach to the Indiana Attorney General. The breach occurred on 2024-05-28 and was reported on 2025-04-30. 1,557 Indiana residents were affected. 67,026 individuals affected in total.
Affected (this filing): 67,026
Thompson Coburn LLP, a St. Louis-based law firm, reported a network intrusion occurring May 28–29, 2024, discovered November 19, 2024. An unauthorized actor viewed or took files containing client-affiliated individuals' names and Social Security numbers. 59 Maine residents were affected (67,026 total). Written notices were sent December 31, 2024 and April 30, 2025. One year of Equifax credit monitoring was offered. Federal law enforcement was notified.
Affected (this filing): 59
Thompson Coburn LLP notified consumers of a data breach where unauthorized actors accessed and acquired information from the firm's network between May 28-29, 2024. The incident involved the viewing or taking of client data, including names and government identifiers. The firm engaged forensic specialists, reviewed affected files, and implemented additional cybersecurity measures. Credit monitoring services were offered to affected individuals.
Thompson Coburn LLP experienced unauthorized access to its network between May 28 and May 29, 2024. The firm became aware of suspicious activity on May 29, 2024. An investigation determined that an unauthorized actor viewed or took certain information, including names and potentially other personal data, from files stored in the firm's environment. The firm engaged third-party forensic specialists, reviewed affected files, implemented additional cybersecurity measures, and is offering credit monitoring to impacted individuals.
Thompson Coburn LLP reported unauthorized access to its network between May 28-29, 2024, discovered on May 29, 2024. The incident involved the viewing or taking of client data, including names and other PII, by an unauthorized actor. Thompson Coburn notified federal law enforcement, engaged forensic specialists, and provided credit monitoring services. Notices were sent to affected individuals starting December 31, 2024.
Affected (this filing): 55