# EDGAR Filing Document

**Accession Number:** 0000039263
**File Stem:** 0000039263-25-000094
**Filing Date:** 2025-6
**Character Count:** 29518
**Document Hash:** cb395fa1977995f9525511569561df00
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000039263-25-000094.hdr.sgml**: 20250627

**ACCESSION NUMBER**: 0000039263-25-000094

**CONFORMED SUBMISSION TYPE**: 11-K

**PUBLIC DOCUMENT COUNT**: 4

**CONFORMED PERIOD OF REPORT**: 20241231

**FILED AS OF DATE**: 20250627

**DATE AS OF CHANGE**: 20250627

**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:** 11-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-13221
- **FILM NUMBER:** 251084602

**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**

**FORM 11-K**

---

| | |
|:---|:---|
| 🗷 | **ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934** |

---

**For the fiscal year ended: December 31, 2024**

**Or**

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| | |
|:---|:---|
| ◻ | **TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934** |

---

**For the transition period from <u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u> to <u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u>**

**Commission File Number 001-13221**

A. Full title of the plan and the address of the plan, if different from that of the issuer named below:

**THE 401(k) STOCK PURCHASE PLAN**

**FOR EMPLOYEES OF CULLEN/FROST**

**BANKERS, INC. AND ITS AFFILIATES**

B. Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:

**CULLEN/FROST BANKERS, INC.**

**111 W. Houston Street**

**San Antonio, TX 78205**

**Telephone Number: (210) 220-4011**

------

**The 401(k) Stock Purchase Plan for Employees of**

**Cullen/Frost Bankers, Inc. and Its Affiliates**

**Financial Statements**

**and Supplemental Schedule**

**As of December 31, 2024 and 2023 and for the year ended December 31, 2024**

**Contents**

---

| | |
|:---|:---|
| Financial Statements |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Report of Independent Registered Public Accounting Firm | <u>[3](#i61ee86f36e4f4d2ca2a21228c87dd080_7)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Statements of Net Assets Available for Benefits | <u>[4](#i61ee86f36e4f4d2ca2a21228c87dd080_10)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Statement of Changes in Net Assets Available for Benefits | <u>[5](#i61ee86f36e4f4d2ca2a21228c87dd080_13)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Notes to Financial Statements | <u>[6](#i61ee86f36e4f4d2ca2a21228c87dd080_16)</u> |
| Supplemental Schedule |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Schedule H, Line 4i—Schedule of Assets (Held at End of Year) | <u>[9](#i61ee86f36e4f4d2ca2a21228c87dd080_40)</u> |

---

------

**Report of Independent Registered Public Accounting Firm**

To the Plan Participants and the Plan Administrator of The 401(k) Stock Purchase Plan for Employees of Cullen/Frost Bankers Inc. and Its Affiliates

**Opinion on the Financial Statements**

We have audited the accompanying statements of net assets available for benefits of The 401(k) Stock Purchase Plan for Employees of Cullen/Frost Bankers Inc. and Its Affiliates (the Plan) as of December 31, 2024 and 2023, and the related statement of changes in net assets available for benefits for the year ended December 31, 2024, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the net assets available for benefits of the Plan at December 31, 2024 and 2023, and the changes in its net assets available for benefits for the year ended December 31, 2024, in conformity with U.S. generally accepted accounting principles.

**Basis for Opinion**

These financial statements are the responsibility of the Plan's management. Our responsibility is to express an opinion on the Plan's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Plan in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Plan is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Plan's internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

**Supplemental Schedule Required by ERISA**

The accompanying supplemental schedule of assets (held at end of year) as of December 31, 2024 (referred to as the "supplemental schedule"), has been subjected to audit procedures performed in conjunction with the audit of the Plan's financial statements. The information in the supplemental schedule is the responsibility of the Plan's management. Our audit procedures included determining whether the information reconciles to the financial statements or the underlying accounting and other records, as applicable, and performing procedures to test the completeness and accuracy of the information presented in the supplemental schedule. In forming our opinion on the information, we evaluated whether such information, including its form and content, is presented in conformity with the Department of Labor's Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. In our opinion, the information is fairly stated, in all material respects, in relation to the financial statements as a whole.

![g446300g25z33a01.jpg](g446300g25z33a01.jpg)

We have served as the Plan's auditor since 1986.

San Antonio, Texas

June 27, 2025

------

**The 401(k) Stock Purchase Plan for Employees of**

**Cullen/Frost Bankers, Inc. and Its Affiliates**

**Statements of Net Assets Available for Benefits**

(Dollars in thousands)

---

| | | |
|:---|:---|:---|
| | **December 31,** | **December 31,** |
| | **2024** | **2023** |
| **Assets** |  |  |
| Participant-directed investments, at fair value | $1194074 | $1021686 |
| Receivables: |  |  |
| &nbsp;&nbsp;&nbsp;Employer contributions | 2020 | 1773 |
| &nbsp;&nbsp;&nbsp;Participant contributions | 1412 | 1233 |
| &nbsp;&nbsp;&nbsp;Notes receivable from participants | 20283 | 17611 |
| Net assets available for benefits | $1217789 | $1042303 |

---

*See accompanying Notes to Financial Statements.*

------

**The 401(k) Stock Purchase Plan for Employees of**

**Cullen/Frost Bankers, Inc. and Its Affiliates**

**Statement of Changes in Net Assets Available for Benefits**

**Year Ended December 31, 2024**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(Dollars in thousands)

---

| | |
|:---|:---|
| **Additions:** | |
| &nbsp;&nbsp;&nbsp;Interest income on notes receivable from participants | $1155 |
| &nbsp;&nbsp;&nbsp;Dividend and interest income on investments | 53876 |
| &nbsp;&nbsp;&nbsp;Net appreciation in fair value of investments | 142590 |
| &nbsp;&nbsp;&nbsp;Contributions: |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Employer | 30340 |
| &nbsp;&nbsp;&nbsp;&nbsp;Participant | 42042 |
| &nbsp;&nbsp;&nbsp;&nbsp;Participant roll-overs | 6281 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total additions | 276284 |
| **Deductions:** |  |
| &nbsp;&nbsp;&nbsp;Benefits paid to participants | 100259 |
| &nbsp;&nbsp;&nbsp;Administrative fees | 539 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total deductions | 100798 |
| Net change | 175486 |
| **Net assets available for benefits:** |  |
| &nbsp;&nbsp;&nbsp;Beginning of year | 1042303 |
| &nbsp;&nbsp;&nbsp;End of year | $1217789 |

---

*See accompanying Notes to Financial Statements.*

------

**The 401(k) Stock Purchase Plan for Employees of**

**Cullen/Frost Bankers, Inc. and Its Affiliates**

**Notes to Financial Statements**

**December 31, 2024 and 2023**

(Table amounts in thousands)

**1. Significant Accounting Policies**

*Basis of Presentation*. The accounting records of The 401(k) Stock Purchase Plan for Employees of Cullen/Frost Bankers, Inc. and Its Affiliates (the "Plan") are maintained on the accrual basis of accounting. Benefits are recorded when paid.

*Investments*. The Plan's investments are composed of common stock of Cullen/Frost Bankers, Inc. ("CFBI") and mutual funds. Investments in CFBI common stock and mutual funds are stated at fair value based on quoted market prices on the valuation date. Changes in fair value of investment securities held during the year and gains and losses on the sale of investment securities are reflected in the statements of changes in net assets available for benefits as net appreciation or depreciation in fair value of investments.

Purchases and sales of securities are recorded on the trade-date basis. Dividends are recorded on the ex-dividend date. Interest is recorded on the accrual basis.

*Notes Receivable from Participants.* Notes receivable from participants are reported at the unpaid principal balance plus accrued interest on the loan. Interest income on notes receivable from participants is recorded when it is earned. Related fees are recorded as administrative expenses and are expensed when they are incurred. No allowance for credit losses has been recorded as of December 31, 2024 or 2023. If a participant ceases to make loan repayments and the Plan administrator, CFBI, deems the participant loan to be a distribution, the participant loan balance is reduced and a benefit payment is recorded.

*Administrative Expenses*. Certain administrative expenses of the Plan are paid by CFBI. Forfeitures may be used to offset administrative expenses.

*Use of Estimates*. The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates that affect amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

**2. Description of the Plan**

The following is a general description of the Plan. Participants should refer to the online summary of the Plan for a more complete description of the Plan's provisions.

*General*. The Plan is a defined contribution plan qualified under Section 401(a) of the Internal Revenue Code (IRC) and generally covers full and part time employees who complete 30 consecutive days of service and are scheduled to work more than 1,000 hours in the next 12 consecutive months. The Plan has certain profit sharing components which cover employees of CFBI and participating affiliates who have completed one year of service and are aged 21 or older. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 (ERISA) as amended. The Frost Retirement Benefits Committee is responsible for the general administration of the Plan.

*Contributions and Investment Options.* With regard to 401(k) contributions, newly hired eligible employees are automatically enrolled to have a specified portion of their compensation (6% during 2024 and increasing to 7% in 2025) contributed to the Plan on their behalf. Employees may change or suspend this contribution election at any time. Participating employees may elect to contribute an amount not less than 2% and not exceeding 50% of their compensation, limited by 401(k) regulations. Participants may direct investments of their accounts into various investment options offered by the Plan. Participants are able to invest their contributions in these funds in 1% increments. Participants must make 401(k) contributions to the Plan to receive a CFBI matching contribution. CFBI matches 100% of each participant's contributions up to 6% of each participant's annual compensation. The match is initially invested in the common stock of CFBI. Each participant may elect to direct the investment of the matching contributions into other allowed investment options by electing to make investment transfers after the CFBI common stock contributions are allocated to the participant's account. Each participant is entitled to exercise voting rights attributable to the shares of CFBI common stock allocated to their account and is notified prior to the time that such rights may be exercised.

CFBI may also make discretionary profit sharing contributions to eligible participants. All profit contributions to the plan are made at the discretion of the board of directors of CFBI and may be made without regard to current or accumulated profits. Contributions are generally allocated to eligible participants uniformly, based upon compensation, age and/or other factors. Plan participants self-direct the investment of allocated contributions by choosing from a menu of investment options. There were no profit sharing contributions in 2024.

------

*Participant Accounts*. Each participant's account is credited with the participant's contributions and allocations of (i) CFBI's contributions and (ii) Plan earnings and charged with applicable expenses. The benefit to which a participant is entitled is the benefit that can be provided from the participant's vested account.

*Vesting.* Participants are immediately vested in all non-profit sharing related contributions (both those made by the participant and by CFBI) plus actual earnings thereon. Profit sharing contributions vest when participants reach three years of service.

*Participant Loans and Withdrawals.* Participants may borrow from the eligible portion of their fund accounts a minimum of $500 up to a maximum of $50,000, reduced by the highest amount of any loan outstanding within the previous twelve months, or 50% of their vested account balance. Loan terms range from 1 to 5 years or up to 30 years for the purchase of a primary residence. The loans are secured by the balance in the participant's account and bear interest at a rate commensurate with local prevailing rates. Principal and interest are paid ratably through semimonthly payroll deductions. Subject to Internal Revenue Service ("IRS") limitations, participants may make hardship withdrawals from a portion of their 401(k) contributions to pay for an immediate and heavy financial need. In addition, participants may make certain other in-service withdrawals if they are eligible.

*Payment of Benefits*. In the event of termination of employment, disability, retirement or death, the participant's account will be distributed to the participant or the participant's beneficiary, in the event of death, according to Plan terms. The payment shall equal the amount of the participant's vested account in the Plan.

*Plan Termination*. Although it has not expressed any present intent to do so, CFBI has the right under the Plan to discontinue its contributions at any time and to terminate the Plan subject to the provisions of ERISA. In the event the Plan terminates, participants will become fully vested in their accounts.

**3. Reconciliation of Financial Statements to the Form 5500**

The following is a reconciliation of net assets available for benefits as reported in the accompanying financial statements to net assets as reported in the Plan's Form 5500 as of December 31, 2024 and 2023:

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| | | |
|:---|:---|:---|
| | **December 31,** | **December 31,** |
| | **2024** | **2023** |
| Net assets available for benefits | $1217789 | $1042303 |
| &nbsp;&nbsp;&nbsp;Less: Contributions receivable |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employer | (2020) | (1773) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Participant | (1412) | (1233) |
| Net assets as reported on Form 5500 | $1214357 | $1039297 |

---

The following is a reconciliation of net increase in net assets available for benefits as reported in the accompanying financial statements to net income as reported in the Plan's annual report Form 5500 for the year ended December 31, 2024:

---

| | |
|:---|:---|
| Net increase in net assets available for benefits | $175486 |
| &nbsp;&nbsp;&nbsp;Less: Contributions receivable as of December 31, 2024 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employer | (2020) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Participant | (1412) |
| &nbsp;&nbsp;&nbsp;Plus: Contributions receivable as of December 31, 2023 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employer | 1773 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Participant | 1233 |
| Net Income as reported on Form 5500 | $175060 |

---

**4. Income Tax Status**

The Plan has received a determination letter from the IRS dated June 27, 2014, stating that the Plan is qualified under Section 401(a) of the IRC and, therefore, the related trust is exempt from taxation. Subsequent to this determination by the IRS the Plan was amended and restated. Once qualified, the Plan is required to operate in conformity with the Code to maintain its qualified status. The Plan administrator believes the Plan is being operated in compliance with the applicable requirements of the Code and therefore believes the Plan, as amended and restated, is qualified and related trust is tax-exempt.

------

U.S. generally accepted accounting principles require the Plan management to evaluate uncertain tax positions taken by the Plan. The financial statement effects of a tax position are recognized when the position is more likely than not, based on the technical merits, to be sustained upon examination by the IRS. The Plan administrator has analyzed the tax positions taken by the Plan and has concluded that, as of December 31, 2024, there are no uncertain positions taken or expected to be taken. The Plan has recognized no interest or penalties related to uncertain tax positions. The Plan is subject to routine audits by taxing jurisdictions; however, there are currently no audits for any tax periods in progress.

**5. Party-In-Interest Transactions**

Parties-in-interest are defined under Department of Labor regulations as any fiduciary of the Plan, any party rendering services to the Plan, the employer, and certain others. Accordingly, transactions conducted by the trustee and custodian, Fidelity Management Trust Company; the record-keeper, Fidelity Workplace Solutions; and CFBI and its affiliates, qualify as party-in-interest transactions. However, these transactions are exempt from the prohibited transactions rules under ERISA. During 2024 the Plan received $10.9 million in common stock dividends from CFBI.

Plan assets are held and invested by the trustee. The record-keeper performs various services for the benefit of participants and CFBI. Certain administrative functions are performed by employees of CFBI or its affiliates; however, no such employees receive compensation from the Plan. Certain other administrative expenses are paid directly by CFBI.

**6. Risks and Uncertainties**

The Plan provides for various investments in common stock and mutual funds. Investment securities, in general, are exposed to various risks, such as interest rate, credit and overall market volatility risk. Due to the level of risk associated with certain investment securities, it is reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect the amounts reported in the accompanying Statements of Net Assets Available for Benefits and in participant account balances.

**7. Fair Value Measurements**

The fair value of an asset or liability is the price that would be received to sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. Accounting Standards Codification (ASC) Topic 820 "Fair Value Measurements and Disclosures" establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy includes (i) Level 1 inputs that are unadjusted quoted prices in active markets for identical assets or liabilities, (ii) Level 2 inputs that are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly and (iii) Level 3 inputs that are unobservable inputs for determining the fair values of assets or liabilities that reflect assumptions that market participants would use in pricing the assets or liabilities.

All investments held by the Plan during the reported periods, as summarized in the table below, are considered Level 1 investments under the fair value hierarchy as fair value is based on quoted prices in active markets.

---

| | | |
|:---|:---|:---|
| | **December 31,** | **December 31,** |
| | **2024** | **2023** |
| Common stock | $378145 | $317413 |
| Mutual funds | 815929 | 704273 |
| Total investments | $1194074 | $1021686 |

---

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**Supplemental Schedule**

**The 401(k) Stock Purchase Plan for Employees of**

**Cullen/Frost Bankers, Inc. and Its Affiliates**

**EIN: 74-1751768 Plan No.: 003**

**Schedule H, Line 4i—Schedule of Assets (Held at End of Year)**

**December 31, 2024**

(Dollar and share amounts in thousands)

---

| | | | |
|:---|:---|:---|:---|
| **Identity of Issue,<br>Borrower, Lessor,<br>or Similar Party** | **Description of Investment, Including<br>Maturity Date,<br>Rate of Interest, Collateral,<br>Par, or Maturity Value** | **Description of Investment, Including<br>Maturity Date,<br>Rate of Interest, Collateral,<br>Par, or Maturity Value** | **Current<br>Value** |
| **Common Stock** | | | |
| &nbsp;&nbsp;&nbsp;\*Cullen/Frost Bankers, Inc. | 2817 | shares | $378145 |
| **Mutual Funds** |  |  |  |
| &nbsp;&nbsp;&nbsp;American Beacon Stephens Small Cap Growth Fund R6 | 13 | shares | 193 |
| &nbsp;&nbsp;&nbsp;American Funds Balanced R6 | 1486 | shares | 51033 |
| &nbsp;&nbsp;&nbsp;DFA Large CAP International I | 1170 | shares | 31268 |
| &nbsp;&nbsp;&nbsp;Dodge & Cox Stock I | 90 | shares | 23171 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Blue Chip Growth R6 | 2208 | shares | 81313 |
| &nbsp;&nbsp;&nbsp;\*Fidelity US Bond Index | 501 | shares | 5120 |
| &nbsp;&nbsp;&nbsp;\*Fidelity 500 Index | 540 | shares | 110284 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Emerging Markets Index | 873 | shares | 9133 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Freedom Index 2020 IPR | 949 | shares | 14969 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Freedom Index 2025 IPR | 1220 | shares | 22663 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Freedom Index 2030 IPR | 1098 | shares | 22151 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Freedom Index 2035 IPR | 1081 | shares | 25228 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Freedom Index 2040 IPR | 855 | shares | 21042 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Freedom Index 2045 IPR | 687 | shares | 17819 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Freedom Index 2050 IPR | 668 | shares | 17361 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Freedom Index 2055 IPR | 751 | shares | 16042 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Freedom Index 2060 IPR | 471 | shares | 8526 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Freedom Index 2065 IPR | 356 | shares | 5215 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Freedom Index 2070 IPR | 1 |  | 12 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Freedom Index Income IPR | 615 | shares | 7201 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Small Cap Index Fund | 941 | shares | 26035 |
| &nbsp;&nbsp;&nbsp;\*Fidelity State Bond Index | 137 | shares | 1348 |
| &nbsp;&nbsp;&nbsp;\*Fidelity Money Market Government Institutional | 59584 | shares | 59584 |
| &nbsp;&nbsp;&nbsp;John Hancock Disciplined Value Mid Cap Fund | 1075 | shares | 28965 |
| &nbsp;&nbsp;&nbsp;MFS Value Fund R6 | 733 | shares | 35486 |
| &nbsp;&nbsp;&nbsp;PIMCO Real Return Fund | 596 | shares | 5941 |
| &nbsp;&nbsp;&nbsp;T Rowe Price Mid Cap Growth Fund | 336 | shares | 33622 |
| &nbsp;&nbsp;&nbsp;Victory Sycamore Small Company Opportunity Fund | 210 | shares | 9918 |
| &nbsp;&nbsp;&nbsp;\*Frost Growth Equity Fund | 4702 | shares | 72924 |
| &nbsp;&nbsp;&nbsp;\*Frost Low Duration Bond Fund | 1020 | shares | 10010 |
| &nbsp;&nbsp;&nbsp;\*Frost Total Return Bond Fund | 4375 | shares | 42352 |
|  |  |  | 815929 |
| **Total Investments** |  |  | $1194074 |
| **\*Participant Loans** | Interest rates ranging from 3.25% to 8.50%; varying maturity dates | Interest rates ranging from 3.25% to 8.50%; varying maturity dates | $20283 |

---

\*Denotes party-in-interest

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**Signatures**

*The Plan.* Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or other persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned, hereunto duly authorized.

---

| | | | |
|:---|:---|:---|:---|
| | | **The 401(k) Stock Purchase Plan for Employees of<br>Cullen/Frost Bankers, Inc. and Its Affiliates** | **The 401(k) Stock Purchase Plan for Employees of<br>Cullen/Frost Bankers, Inc. and Its Affiliates** |
| Date: | June 27, 2025 | By: | /s/ Annette Alonzo |
|  |  |  | Plan Administrator, Plan Chief Executive<br>Officer and Plan Chief Financial Officer<br>(Duly Authorized Officer) |

---

------

**Exhibit Index**

---

| | |
|:---|:---|
| **Exhibit Number** | **Description** |
| 23.1 | <u>[Consent of Independent Registered Public Accounting Firm](exhibit231consentindependea.htm)</u> |
| 32.1 | <u>[Section 1350 Certification](exhibit321section1350certia.htm)</u> |

---

## Exhibit 23.1

**Exhibit 23.1**

**Consent of Independent Registered Public Accounting Firm**

We consent to the incorporation by reference in the Registration Statements (Form S-8 No. 333-157236, No. 333-37500, No. 33-108321 and No. 333-278998) pertaining to The 401(k) Stock Purchase Plan for Employees of Cullen/Frost Bankers, Inc. and Its Affiliates of our report dated June 27, 2025, with respect to the financial statements and schedule of The 401(k) Stock Purchase Plan for Employees of Cullen/Frost Bankers, Inc. and Its Affiliates included in this Form 11-K for the year ended December 31, 2024.

/s/ Ernst & Young, LLP

San Antonio, Texas

June 27, 2025

## Exhibit 32.1

**Exhibit 32.1**

**Section 1350 Certification of the Plan's Chief Executive Officer**

**and Chief Financial Officer**

In connection with the Annual Report on Form 11-K for the plan year ended December 31, 2024 (the "Report") of The 401(k) Stock Purchase Plan for Employees of Cullen/Frost Bankers, Inc. and its Affiliates (the "Plan") and pursuant to Subsections (a) and (b) of Section 1350 of Chapter 63 of Title 18 of the United States Code in accordance with Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned, <u>Annette Alonzo,</u> <u>Plan Administrator, Plan Chief Executive Officer and Plan Chief Financial Officer</u> hereby certifies, to her knowledge, that the Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, and the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Plan.

June 27, 2025

<u>/s/ Annette Alonzo&nbsp;&nbsp;&nbsp;&nbsp;</u>

Annette Alonzo

*The forgoing certification is being furnished solely pursuant to Subsections (a) and (b) of Section 1350 of Chapter 63 of Title 18 of the United States Code in accordance with Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, and shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.*

<br>