Simmons Bank

Simmons Bank notified California AG on Nov 15, 2022 of a data breach, which occurred on Aug 2, 2022. Data exposed: Social Security number, Financial / bank account, Postal address, Name.

Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization: Simmons Bank
Source: California AG · source record
Date reported: Nov 15, 2022
Date(s) of breach: Wednesday, September 1, 2021Tuesday, August 2, 2022
Residents affected: Not published by this source
Data exposed: Social Security number Financial / bank account Postal address Name
Notice letter: Sample notice (PDF)
Discovered: Sep 21, 2022, as stated in the letter
"On September 21, 2022, Simmons Bank was informed by its vendor, Mayer Brown LLP, of a cybersecurity incident affecting Mayer Brown’s vendor, AMS Collaborator, which provides a file sharing service."
Days to notice: 55 days from discovery (Sep 21, 2022) to the California record (Nov 15, 2022). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82). Over the statutory period
Offered in the letter: 12 months of 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 16:01 UTC

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

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