Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * WAWROSKI JUDITH I 2. Issuer Name and Ticker or Trading Symbol INTERNATIONAL BANCSHARES CORP [IBOC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) TREASURER/PAO (Last) (First) (Middle) 1200 SAN BERNARDO 3. Date of Earliest Transaction (Month/Day/Year) 09/05/2025 (Street) LAREDO, TX 78040 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 09/05/2025 M(1) 600 A $39.33 11,772 D Common Stock 09/05/2025 D(1) 600 D $71.58(2) 11,172 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

STOCK APPRECIATION RIGHTS(3)

$39.33(3)

09/05/2025

09/05/2025

M

600

07/14/2025(4)

07/14/2032

COMMON STOCK

600

$71.58

3,400

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
WAWROSKI JUDITH I 1200 SAN BERNARDO LAREDO, TX 78040			TREASURER/PAO

Signatures

/s/ Judith Wawroski		09/09/2025
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	These stock appreciation rights (these "SARs") became vested and payable as of July 14, 2025. In accordance with the rules for filing a Form 4, the settlement of cash-settled SARs is treated as the simultaneous purchase of the number of shares of common stock the SARs represent and the sale of the same number of shares of common stock. Upon vesting, the SARs were only payable in cash and the reporting person did not receive any shares of the common stock, par value $1.00 per share (the "Common Stock"), of International Bancshares Corporation (the "Company").
(2)	Represents the closing price of the Company's Common Stock on September 5, 2025, the date the SARs were exercised (the "Exercise Date").
(3)	These SARs represent the right to receive, upon exercise, a cash amount equal to the number of shares of the Company's Common Stock underlying the SARs being exercised multiplied by the excess of the fair market value of one share of Common Stock on (i) the Exercise Date, and (ii) July 14, 2022, the date the SARs were granted (the "Grant Date").
(4)	These SARs are subject to a seven-year vesting schedule and become exercisable in six percentage installments, vesting 5% on the second anniversary of the Grant Date, and 10%, 15%, 20%, 25%, and 25% on each respective anniversary of the Grant Date thereafter.

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