Case file: Prosper Marketplace, Inc
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
- Apr 29, 2025 to Sep 2, 2025
- Discovered
- Sep 1, 2025, as stated in the California letter
- State and federal records
- 3 filings, Dec 9, 2025 to Dec 10, 2025
- Residents counted
- 1,161,581 in 1 state (TX), latest filing per state
- Everyone affected
- 13,076,476, as reported to Texas AG on Dec 10, 2025
- Information exposed
- Social Security number, Driver's license / state ID, Passport number, Financial / bank account, Date of birth
- Offered to those affected
- credit or identity monitoring through Experian (term not stated in the letter we read)
- Third party named
- Yes, the letter attributes the incident to a vendor or service provider
- Days to notice
- Past the statutory period in all 3 states that set one, counted from discovery to each state's first record
- Prior incidents
- 1 earlier incident on record for this organization
The letter: "On September 1, 2025, Prosper discovered unauthorized activity on our systems."
Filings
| Agency | Record date | People | In total | Days to notice | Links |
|---|---|---|---|---|---|
| Texas Texas AG | Dec 10, 2025 | 1,161,581 | 13,076,476 | 100 days, statute 60 days, over | Record |
| Oregon Oregon DOJ | Dec 9, 2025 | 13,076,476 (total) | 99 days, statute 45 days, over | Record | |
| California California AG | Dec 9, 2025 | Not published | 99 days, statute 30 days, over | Letter 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
- 100 days from discovery (Sep 1, 2025) to the Texas record (Dec 10, 2025). Statute: 60 days from determination that the breach occurred (Tex. Bus. & Com. Code § 521.053).
- 99 days from discovery (Sep 1, 2025) to the Oregon record (Dec 9, 2025). Statute: 45 days from discovery or notification of the breach (ORS 646A.604).
- 99 days from discovery (Sep 1, 2025) to the California record (Dec 9, 2025). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
The statutes
- Texas: 60 days to notify residents from determination that the breach occurred, Tex. Bus. & Com. Code § 521.053. Attorney General within 30 days of determination when 250 or more Texas residents are affected.
- 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).
Prior incidents by Prosper Marketplace, Inc
| Records | Breach window | Filed with | People |
|---|---|---|---|
| Nov 26, 2018 | Oct 3, 2018 | California | n/a |
Filings more than six months apart are shown as separate incidents.
Sources and method
Records as published by Texas AG, Oregon DOJ, California AG. 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.