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Confirmed breach

TransUnion data breach

USUnited States · TransUnion LLC

TransUnion (United States) notified the Oregon Department of Justice, the Iowa Attorney General, the Wisconsin Department of Agriculture, Trade and Consumer Protection, the California Attorney General and the Washington Attorney General of a data breach on 26 August 2025. It told the states about 4,461,511 Oregon residents; the total can be higher. Exposed: Social Security numbers and Dates of birth.

Status

Confirmed breach

People affected

4,461,511 Oregon residents (one state’s count; the total can be higher)

Reported

26 August 2025

Across the state notices

at least 4,619,456 people (Oregon, Wisconsin and Washington: each state counts only its own residents)

What was exposed

• Social Security numbers
• Dates of birth

Sources

• Official notice · 26 August 2025 · 69,256 Wisconsin residentsWisconsin Department of Agriculture, Trade and Consumer Protection
• Official notice · 27 August 2025California Attorney General
• Official notice · 27 August 2025 · 88,689 Washington residentsWashington Attorney General
• Official notice · 2 September 2025 · 4,461,511 Oregon residentsOregon Department of Justice
• Official notice · 2 September 2025Iowa Attorney GeneralTransUnion LLC (Financial Services): breach notice to the Iowa Attorney General

Official notices are read by code from the regulator’s own register. More notices to Oregon, Iowa, Wisconsin, California, Washington. · Corrections and changes

If TransUnion had your data

1. Look for TransUnion LLC’s own notice or letter: it should say what of yours was involved. Keep it.
2. An ID number cannot be changed, so lock it: a credit freeze or fraud alert in the US, a credit warning (kreditadvarsel) on borger.dk in Denmark, Cifas protective registration in the UK.
3. Expect scams that use your details: calls, texts or emails pretending to be TransUnion LLC, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

• Spot the scams that use leaked data →
• If your ID number leaked →
• What to do after a data breach →

Email me if TransUnion has another breach

Alert me

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Earlier breaches at TransUnion

From the official registers’ and Have I Been Pwned’s full histories. A name match: check the notice to be sure it is the same company.

1. 4 August 2022 California Attorney General · began 4 August 2021

More breaches in United States

1. QH Quantum HealthUSUnited States · OH · 28 October 2026 Social Security numbersHealth insurance detailsHealth and medical information+1 273.1KTexas residents
2. ID Indico Data SolutionsUSUnited States · MA · 28 October 2026 Social Security numbersDriver’s license numbersGovernment ID numbers+6 2.1KTexas residents
3. AA Apollo Asset ManagementUSUnited States · NY · 28 October 2026 Social Security numbersDriver’s license numbersGovernment ID numbers+3 1.5KTexas residents
4. DT DBA Tanya AlexanderUSUnited States · TX · 28 October 2026 NamesAddresses 417Texas residents
5. DR DMW Retail Enterprises LLC dba Kult of Athena (KOA)USUnited States · IL · 28 October 2026 Financial account and card detailsNames 306Texas residents

Every breach in United States →

From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.