DisclosureLens
UnknownFinancial ServicesFinanceFinancial accountIdentity (basic)Government IDCritical

Frost Bank

bd_5f4aac65b3dc3f39 · schema v1 · pii pii-v1

Severity

Critical

Discovered

Apr 22, 2026

Filed

May 20, 2026

To disclose

28 days

Affected · nationwide

200,271191,848 in this filing

Linked

6 filings

Confidence

95%
Full breach record for Frost Bank

Frost Bank based in San Antonio, Texas, a financial services entity reported a data breach to the Texas Attorney General. The breach was discovered on 2026-04-22 and reported on 2026-05-20. 191,848 Texas residents were affected. 200,271 individuals affected in total. Types of information involved: Name of individual;Address;Social Security Number Information;Financial Information (e.g. account number, credit or debit card number);Date of Birth. Consumers were notified via U.S. Mail.

Texas clock TX AG ≤30d28 days discovery → filing
AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 137 days
discovery → filing · ≤ 28 days

Dec 6, 2025

Begins

Apr 22, 2026

Discovered

May 20, 2026

Filed

vs. sector median

4 wks faster

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (1)

Regulatory filings (4) · sorted by filing gap

Filing propagation · 5 filings · 5 states

View merged incident ↗
Montana State AGMay 19 · first
Texas State AG+1d · this page

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.