Case file: TransUnion LLC
Every government filing on this incident, the dates as stated, and the days to notice against each state's statute. Built from the records on Nov 9, 2026, agency link on every row. Not legal advice.
The incident
- Breach window
- Jul 28, 2025
- Discovered
- No discovery date stated in the letters we read
- State and federal records
- 3 filings, Aug 26, 2025 to Sep 2, 2025
- Residents counted
- 69,256 in 1 state (WI), latest filing per state
- Everyone affected
- 4,461,511, as reported to Oregon DOJ on Sep 2, 2025
- Information exposed
- Postal address, Social Security number
- Offered to those affected
- 24 months of credit or identity monitoring through Experian
- Third party named
- Yes, the letter attributes the incident to a vendor or service provider
- Prior incidents
- 1 earlier incident on record for this organization
Filings
| Agency | Record date | People | In total | Days to notice | Links |
|---|---|---|---|---|---|
| Oregon Oregon DOJ | Sep 2, 2025 | 4,461,511 (total) | No dates to count between | Record | |
| California California AG | Aug 27, 2025 | Not published | 30 days from breach end, statute 30 days | Letter Record | |
| Wisconsin Wisconsin DATCP | Aug 26, 2025 | 69,256 | 29 days from breach end, statute 45 days | Record |
People is the count the filing gives, residents of the state unless marked total. Days to notice runs from the discovery date the letter states, or from the end of the breach window when no letter states one, to the date on the state's first record of the incident. "Over" marks a count past the days the state's statute allows for notice to residents. The statute's trigger is a question of fact, the days are arithmetic.
Notice timing, state by state
- 30 days from the end of the breach window (Jul 28, 2025, no discovery date in the letter) to the California record (Aug 27, 2025). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
- 29 days from the end of the breach window (Jul 28, 2025, no discovery date in the letter) to the Wisconsin record (Aug 26, 2025). Statute: 45 days from learning of the acquisition (Wis. Stat. § 134.98).
The statutes
- Oregon: 45 days to notify residents from discovery or notification of the breach, ORS 646A.604. Attorney General when more than 250 Oregon residents are affected, with the consumer notice.
- California: 30 days to notify residents from discovery or notification of the breach, Cal. Civ. Code § 1798.82. Sample notice to the Attorney General when more than 500 Californians are notified, within 15 days of the consumer notice (effective 2026).
- Wisconsin: 45 days to notify residents from learning of the acquisition, Wis. Stat. § 134.98. No notice to a state agency. Consumer reporting agencies when 1,000 or more are notified.
Prior incidents by TransUnion LLC
| Records | Breach window | Filed with | People |
|---|---|---|---|
| Aug 4, 2022 | Jan 31, 2022 | California | n/a |
Filings more than six months apart are shown as separate incidents.
Filings by others that name TransUnion LLC
Clients of a breached vendor often file under their own names and name the vendor.
- TransUnion Risk and Alternative Data Solutions, Inc. (TRADS), Oregon, Oct 3, 2024, 86,569
- TransUnion Risk and Alternative Data Solutions, Inc. (TRADS), California, Oct 2, 2024
Sources and method
Records as published by Oregon DOJ, California AG, Wisconsin DATCP. Letter facts (discovery date, monitoring, third party) are read from the consumer letter the agency posted, 1 letter read for this incident, and quoted so you can check them. Texas and HHS publish no letters. First-seen times on each record page. Spot an error? Email support@breachtally.com with this page link.