Where does the TransUnion LLC case file come from?

Every entry is taken from the breach report TransUnion LLC lodged with the California 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: TransUnion LLC Data Breach

This file collects the dated facts on record for the TransUnion LLC incident. The state report is dated August 27, 2025. The incident itself is dated July 28, 2025.

Timeline

30 days separate the incident date from the date it was reported.

July 28, 2025Incident dateWhen the filing says the breach took place.
August 27, 2025Report filed in CaliforniaDate the notice was lodged with the California Attorney General.

Case facts

Filing state: California
Date reported: August 27, 2025
Incident date: July 28, 2025
Receiving office: California Attorney General

Case notes

On August 27, 2025, TransUnion LLC submitted a data breach notification to authorities in California. This filing pertains to a data security incident that was identified on July 28, 2025. The company has indicated that it is currently investigating the scope and nature of what transpired.

The public filing does not specify the type of breach that occurred or the precise categories of personal information that may have been affected. Similarly, the total number of individuals whose data may have been involved has not been disclosed in the available documentation.

Due to the lack of specific details in the public record, TransUnion LLC’s notification refers generally to the exposure of personal information. Individuals who receive a direct notification letter from TransUnion LLC should carefully review it for precise details about what information of theirs may have been compromised.

As a general precaution following any data security incident, it is advisable to remain vigilant. Consider regularly reviewing your financial account statements and credit reports for any unusual or unauthorized activity. You may also consider placing a fraud alert or security freeze on your credit files to help prevent unauthorized access.

This information is based on public filings made with regulators. Those who have received official notice from TransUnion LLC should cross-reference their letters with the details available in official records to understand the full context of this event and take appropriate protective steps.

Questions about this case file

Where does the TransUnion LLC case file come from?: Every entry is taken from the breach report TransUnion LLC lodged with the California 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.

California data breaches

Filing source: California Attorney General

Named in the TransUnion LLC breach?

Attach your notice and a short note. An attorney checks it against this case file at no cost.

Timeline

Case facts

Case notes

Questions about this case file

More California case files