Where does the Thompson and Horton LLP case file come from?

Every entry is taken from the breach report Thompson and Horton LLP lodged with the Massachusetts Attorney General. Nothing here is estimated.

Why do the incident date and the report date differ?

Companies usually investigate before they report. The gap between the two dates shows how long that took.

What does the records-affected figure count?

It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.

Does this case file change over time?

Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

Case file

Case File: Thompson and Horton LLP Data Breach

This file collects the dated facts on record for the Thompson and Horton LLP incident. The state report is dated October 30, 2025.

Timeline

October 30, 2025Report filed in MassachusettsDate the notice was lodged with the Massachusetts Attorney General.

Case facts

Filing state: Massachusetts
Date reported: October 30, 2025
Receiving office: Massachusetts Attorney General

Case notes

Thompson and Horton LLP, a Massachusetts-based law firm, filed a report with the Massachusetts Attorney General on October 30, 2025, concerning a data security incident. The firm indicated that it is currently investigating the full scope and nature of the incident.

As a prominent law firm, Thompson and Horton LLP handles highly sensitive information for its clients and operations. Such organizations routinely manage extensive repositories of confidential data, including various forms of personal information. The filing suggests unauthorized access occurred within the firm's network infrastructure.

While the specific types of information involved were not detailed in the official filing, incidents affecting such organizations often put personal information at risk. The exposure of such data can lead to potential misuse, underscoring the importance for affected individuals to remain vigilant regarding their personal security.

Individuals who receive a formal notification from Thompson and Horton LLP are advised to carefully review the details provided in their letter. It is always recommended to promptly monitor financial accounts and credit reports for any suspicious or unauthorized activity.

For enhanced protection, consider placing a fraud alert or credit freeze with the major credit bureaus. Additionally, be cautious of any unsolicited communications asking for personal details, as these could be attempts to gain further access to your information.

Questions about this case file

Where does the Thompson and Horton LLP case file come from?: Every entry is taken from the breach report Thompson and Horton LLP lodged with the Massachusetts Attorney General. Nothing here is estimated.
Why do the incident date and the report date differ?: Companies usually investigate before they report. The gap between the two dates shows how long that took.
What does the records-affected figure count?: It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.
Does this case file change over time?: Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

Massachusetts data breaches

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Timeline

Case facts

Case notes

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