IBOC director sells 10,000 shares at $72 each

INTERNATIONAL BANCSHARES CORP director Larry A. Norton reported an open-market sale of 10,000 shares of common stock at $72.00 per share.

Rhea-AI Filing Summary

INTERNATIONAL BANCSHARES CORP director Larry A. Norton reported an open-market sale of 10,000 shares of common stock at $72.00 per share. The transaction was carried out through a partnership that holds shares indirectly associated with him.

After this sale, the partnership’s remaining indirect holdings reported in the filing were 111,917 shares. The Form 4 also shows 656 shares held directly and 274 shares held indirectly through his wife, indicating that Norton continues to have a substantial reported equity interest in the company following the transaction.

Insights

Equity compensation and insider trading analyst

Director completes 10,000-share open-market sale but retains large position.

Director Larry A. Norton executed an open-market sale of 10,000 shares of INTERNATIONAL BANCSHARES CORP common stock at $72.00 per share. The sale occurred through a partnership categorized as an indirect holding.

Following the sale, that partnership still reported 111,917 shares, and the Form 4 lists additional holdings of 656 shares directly and 274 shares through his wife. With no derivative positions disclosed and significant equity remaining, this filing appears to show a routine reduction in holdings rather than a wholesale exit.

Insider Trade Summary

Net Seller: 10,000 shares

Net Sell 3 txns

Insider Norton Larry A

Role Director

Sold 10,000 shs ($720K)

Type	Security	Shares	Price	Value
Sale	Common Stock	10,000	$72.00	$720K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 111,917 shares (Indirect, Held in partnership); Common Stock — 656 shares (Direct); Common Stock — 274 shares (Indirect, Held by wife)

Key Figures

Shares sold: 10,000 shares Sale price: $72.00 per share Indirect partnership holdings after sale: 111,917 shares +3 more

6 metrics

Shares sold 10,000 shares Open-market sale of common stock

Sale price $72.00 per share Price for 10,000-share sale

Indirect partnership holdings after sale 111,917 shares Common stock held indirectly in partnership

Direct holdings after transactions 656 shares Common stock held directly by Norton

Spousal indirect holdings 274 shares Common stock held by wife

Net share change -10,000 shares Net buy/sell direction in transaction summary

Key Terms

open-market sale, indirect, direct, Held in partnership, +1 more

5 terms

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

indirect financial

"ownership_type: indirect; nature_of_ownership: Held in partnership"

direct financial

"ownership_type: direct; total_shares_following_transaction: 656.0000"

Held in partnership financial

"nature_of_ownership: Held in partnership"

Held by wife financial

"nature_of_ownership: Held by wife"

FAQ

What insider transaction did INTERNATIONAL BANCSHARES CORP (IBOC) director Larry A. Norton report?

Director Larry A. Norton reported an open-market sale of 10,000 shares of INTERNATIONAL BANCSHARES CORP common stock. The shares were sold at $72.00 each through an indirectly held partnership, according to the Form 4 filing’s transaction details.

At what price were the 10,000 IBOC shares sold in Larry A. Norton’s Form 4 filing?

The 10,000 INTERNATIONAL BANCSHARES CORP shares were sold at $72.00 per share. This price is explicitly listed as the transaction price per share for the non-derivative open-market sale reported in the Form 4.

How many INTERNATIONAL BANCSHARES CORP shares does the partnership hold after Larry A. Norton’s sale?

After the 10,000-share sale, the partnership associated with Larry A. Norton held 111,917 INTERNATIONAL BANCSHARES CORP shares. This post-transaction balance is reported as the total shares following the transaction for the indirect partnership holding.

What are Larry A. Norton’s direct holdings in INTERNATIONAL BANCSHARES CORP after the reported transactions?

The Form 4 shows Larry A. Norton with 656 INTERNATIONAL BANCSHARES CORP shares held directly after the reported transactions. This is separate from his indirect holdings through the partnership and the 274 shares reported as held by his wife.

Does the Form 4 for INTERNATIONAL BANCSHARES CORP (IBOC) show any derivative securities for Larry A. Norton?

The Form 4 derivativeSummary is empty, indicating no derivative securities, such as stock options or warrants, are reported for Larry A. Norton in this filing. All disclosed positions relate to common stock holdings only.

What is the net share change in Larry A. Norton’s IBOC position from this Form 4?

The filing’s transaction summary shows a net change of -10,000 shares for Larry A. Norton. This reflects one open-market sale of 10,000 shares, with no reported purchases or derivative exercises offsetting that disposition in the same Form 4.

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Accepted by SEC EDGAR 05/22/2026 - 04:16 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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 for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Norton Larry A

(Last) (First) (Middle)

1200 SAN BERNARDO

(Street)

LAREDO TEXAS 78040

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
INTERNATIONAL BANCSHARES CORP [ IBOC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	05/21/2026		S		10,000	D	$72	111,917	I	Held in partnership
Common Stock								656	D
Common Stock								274	I	Held by wife

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 Securities Underlying Derivative Security (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: 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

Explanation of Responses:

	/s/ LARRY A. NORTON	05/22/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)