Strauss Borrelli PLLC, a leading data breach law firm, is investigating TransUnion, LLC regarding its recent data breach. The TransUnion data breach involved sensitive personal information belonging to over 4,400,000 individuals.
ABOUT TRANSUNION, LLC:
TransUnion is a consumer credit reporting agency based in Illinois. Founded in 1968, TransUnion provides credit reporting and consumer insight services for individuals and businesses. 2 The services provided by TransUnion include credit score, credit report, credit freeze, and fraud alert for individuals, as well as consumer marketing analytics, fraud prevention, risk assessment, and branding communication solutions for businesses.2 Headquartered in Chicago, Illinois, TransUnion employs over 10,000 individuals.3
WHAT HAPPENED?
Recently, TransUnion reported to the Attorney General of Maine that it had experienced a data breach in which sensitive personal identifiable information in its care may have been compromised. According to the breach notice, on July 30, 2025, TransUnion discovered a breach involving a third-party application serving their U.S. consumer support operations.1 As a result, TransUnion launched an investigation to determine the nature of the incident.
Through its investigation, TransUnion confirmed that sensitive personal information in its systems may have been accessed by an unauthorized third party during the breach. As a result, TransUnion began a review of the data to determine what information had been impacted as well as identify the specific individuals affected. As of August 28, 2025, the type of information impacted in the breach has not been made publicly available by TransUnion.¹ However, according to Maine state reporting guidelines, “personal information” can include the following types of information:
- Name
- Social Security number
- Driver’s license number or State ID card number
- Account number or credit or debit card number
- Account passwords, PINs, and other access codes
As a result of the breach, TransUnion has begun mailing notice to affected individuals. According to the notice sent to Maine residents, TransUnion is providing affected individuals with a list of the specific types of sensitive information impacted and complimentary credit monitoring services.1 A link to the breach notice that TransUnion filed with the Attorney General of Maine is below.
If you received a breach notification letter from TransUnion, LLC:
We would like to speak with you about your rights and potential legal remedies in response to this data breach. Please fill out the form, below, or contact us at 872.263.1100 or sam@straussborrelli.com.
