UnknownGovernment IDHealth (basic)Medium

Thompson & Horton LLP

bd_67012f31f4f0f1c0 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Oct 30, 2025

To disclose

—

Affected

29state residents only

Linked

8 filings

Confidence

95%

Full breach record for Thompson & Horton LLP →

Thompson and Horton LLP reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2025-10-30. 29 Massachusetts residents were affected.

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Massachusetts clock✓ MA credit monitoring due

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Incident timeline — partial

? — ?

Breach window unknown

Oct 30, 2025

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

This filing is one of 8 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (7) · sorted by filing gap

Maine State AGbd_2460f839b22fc5042025-10-30Verified
Texas State AGbd_71c2bdcabc3a48a72025-10-30Verified
Nebraska State AGbd_2920937e521821482025-10-29 · +1dVerified
Montana State AGbd_62dd0345ed0ce4652025-10-29 · +1dCandidate

Show 3 more filings ↓up to 1d gap

New Hampshire State AGbd_68dca34fb6031c4d2025-10-29 · +1dVerified
Indiana State AGbd_b344e037d355f1a02025-10-29 · +1dVerified
Vermont State AGbd_ca2da2865ef941c22025-10-29 · +1dVerified

Name: Thompson & Horton LLP
norm: thompson horton

Name: Thompson & Horton LLP
norm: thompson horton

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 29state-resident count only
Data types: Government IDHealth (basic)
Data elements: Social Security numberMedical information
Stated not affected: Financial account numberDriver's licence numberPayment card number
The filing states these were not involved. Categories absent from both lists were not addressed either way.
Attack vector: Unknown
Threat actor: External

Compliance flags: MA credit monitoring due
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 8 states

View merged incident ↗

Nebraska State AGOct 29 · first

Montana State AGOct 29 · first

New Hampshire State AGOct 29 · first

Indiana State AGOct 29 · first

Vermont State AGOct 29 · first

Maine State AG+1d

Texas State AG+1d

Massachusetts State AG+1d · this page

Evidence ladder

Leak-site claim

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

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

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

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.mass.gov/doc/data-breach-report-2025/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 30, 2025
Raw hash: a916dee87f8259ba43c1675960f9319c2751d7c3d4ee264dfedc2b2482bbd219

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityThompson & Horton LLP

Victim entityThompson & Horton LLP

IncidentUnknown

ComplianceMA credit monitoring due

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov