# EDGAR Filing Document

**Accession Number:** 0000039263
**File Stem:** 0000039263-26-000024
**Filing Date:** 2026-3
**Character Count:** 2424
**Document Hash:** 8a67248df2215f99ce2fd832cbf7a815
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000039263-26-000024.hdr.sgml**: 20260320

**ACCESSION NUMBER**: 0000039263-26-000024

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260320

**DATE AS OF CHANGE**: 20260320

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CULLEN/FROST BANKERS, INC.
- **CENTRAL INDEX KEY:** 0000039263
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATIONAL COMMERCIAL BANKS [6021]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 741751768
- **STATE OF INCORPORATION:** TX
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-13221
- **FILM NUMBER:** 26777826

**BUSINESS ADDRESS:**
- **STREET 1:** 111 W HOUSTON ST
- **CITY:** SAN ANTONIO
- **STATE:** TX
- **ZIP:** 78205
- **BUSINESS PHONE:** 210-220-4011

**MAIL ADDRESS:**
- **STREET 1:** POST OFFICE BOX 1600
- **CITY:** SAN ANTONIO
- **STATE:** TX
- **ZIP:** 78296-1600

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CULLEN FROST BANKERS INC
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FROST BANK CORP
- **DATE OF NAME CHANGE:** 19770823

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**SCHEDULE 14A**

**Proxy Statement Pursuant to Section 14(a) of the**

**Securities Exchange Act of 1934**

Filed by the Registrant: ☒&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Filed by a Party other than the Registrant: ☐

Check the appropriate box:

☐&nbsp;&nbsp;&nbsp;&nbsp; Preliminary Proxy Statement

☐&nbsp;&nbsp;&nbsp;&nbsp; **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))**

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐&nbsp;&nbsp;&nbsp;&nbsp; Soliciting Material Pursuant to §240.14a-12

**Cullen/Frost Bankers, Inc.**

    

**(Name of Registrant as Specified In Its Charter)**

    

**(Name of Person(s) Filing Proxy Statement, if other than the Registrant)**

Payment of Filing Fee (Check the appropriate box):

☒ No fee required

☐ Fee paid previously with preliminary materials

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

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