Prosperity Bancshares (PB) director reports open-market sale of 22,000 shares

Rhea-AI Filing Summary

PROSPERITY BANCSHARES INC director Perry Jr. Mueller reported net open-market sales of 22,000 shares of Common Stock through indirect accounts. The sales occurred on February 12, 13 and 17, 2026 at prices around $72.84–$73.20, through an IRA and a spouse-held account.

After these sales, the IRA held 162,054 shares and the spouse-held account held 2,588 shares. Separate holdings reported as of February 12, 2026 included 16,825 shares held directly and 86,671 shares held indirectly by a special trust.

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

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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^*

MUELLER PERRY JR

(Last) (First) (Middle)

203 THAT WAY

(Street)

LAKE JACKSON TX 77566

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
PROSPERITY BANCSHARES INC [ PB ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
02/12/2026

4. If Amendment, Date of 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

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	02/13/2026		S		8,718	D	$73.0063	173,336(1)	I	By IRA
Common Stock	02/17/2026		S		11,282	D	$73	162,054	I	By IRA
Common Stock	02/12/2026		S		1,900	D	$73.1971	2,688(3)	I	By spouse
Common Stock	02/17/2026		S		100	D	$72.8418	2,588	I	By spouse
Common Stock								16,825	D
Common Stock								86,671(2)	I	By special trust

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:

1. Includes 111 shares acquired through the Prosperity Bancshares, Inc. dividend reinvestment plan since the last filing by the reporting person.

2. Includes 1,345 shares acquired through the Prosperity Bancshares, Inc. dividend reinvestment plan since the last filing by the reporting person.

3. Includes 115 shares acquired through the Prosperity Bancshares, Inc. dividend reinvestment plan since the last filing by the reporting person.

	/s/ Perry Mueller Jr.	02/18/2026
	** 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.

FAQ

What insider transactions did PB director Perry Jr. Mueller report?

Perry Jr. Mueller reported open-market sales of 22,000 PB common shares through indirect accounts. The transactions were executed over several days in February 2026, reflecting net selling activity rather than new share acquisitions.

On what dates did Perry Jr. Mueller’s PB stock sales occur and at what prices?

The reported sales occurred on February 12, 13, and 17, 2026 at per-share prices of about $72.84 to $73.20. All transactions involved PB common stock in open-market or private sale transactions.

How many Prosperity Bancshares shares did Mueller’s IRA and spouse accounts sell?

Mueller’s IRA and spouse accounts together sold 22,000 shares of PB common stock. The IRA executed multiple sales, and a spouse-held account also sold shares, all classified as open-market transactions.

What were Perry Jr. Mueller’s PB share holdings after the reported sales?

Following the sales, Mueller’s IRA held 162,054 PB shares and a spouse-held account held 2,588 shares. Additional reported positions included 16,825 shares held directly and 86,671 shares held indirectly by a special trust.

How are Perry Jr. Mueller’s PB holdings characterized in terms of direct and indirect ownership?

Mueller reported direct ownership of 16,825 PB shares and several indirect holdings. Indirect positions include shares held by an IRA, a spouse, and a special trust, each listed separately with its own share balance.

What type of transactions were reported in this PB Form 4 filing?

The Form 4 shows non-derivative open-market sales of PB common stock and updates to share balances. Four entries are coded as sales, and two additional entries update direct and special-trust holdings without coded buy or sell activity.