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Latest / California / December 2025

Prosper Marketplace, Inc.

Prosper Marketplace, Inc. notified California AG on Dec 9, 2025 of a data breach, which occurred on Sep 2, 2025.

All 4 filings by Prosper Marketplace, Inc., state by state · Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization
Prosper Marketplace, Inc.
Source
California AG · source record
Date reported
Dec 9, 2025
Date(s) of breach
Tuesday, April 29, 2025Tuesday, September 2, 2025
Residents affected
Not published by this source
Data exposed
Not stated in the source listing
Notice letter
Sample notice (PDF)
Discovered
Sep 1, 2025, as stated in the letter
"On September 1, 2025, Prosper discovered unauthorized activity on our systems."
Days to notice
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). Over the statutory period
Offered in the letter
credit or identity monitoring through Experian
Third party
The letter attributes the incident to a vendor or service provider
First seen by BreachTally
2026-10-30 15:28 UTC

Dates and counts as filed by the organization with the agency. The breach window and the report date often differ by months.

First seen by BreachTally at 15:28 UTC on Oct 30, 2026. New filings reach paid subscribers within 30 minutes of the agency posting, with the count, the data exposed and the letter. Start a 14-day free trial. We email you two days before the first charge and you cancel in one click.
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Other filings by Prosper Marketplace, Inc.

OrganizationSourceStateReportedResidents affectedData exposed
Prosper Marketplace, Inc Texas AG TX Dec 10, 2025 1,161,581 Social Security numberDriver's license / state IDPassport numberFinancial / bank account+2
Prosper Marketplace, Inc. Oregon DOJ OR Dec 9, 2025 13,076,476 Not stated
Prosper Marketplace, Inc. California AG CA Nov 26, 2018 Not published Not stated

Data reproduced from a public government filing. Spot an error? Email support@breachtally.com with the record link. Corrections are applied and noted.