STOCK TITAN

Stellar Bancorp (STEL) chair’s shares cancelled in Prosperity merger

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Stellar Bancorp, Inc. Executive Chairman Steven F. Retzloff reported multiple dispositions of Stellar common stock on July 1, 2026, coded as issuer dispositions tied to the completion of the company’s merger with Prosperity Bancshares, Inc. These include 378,240 shares held by Retzloff Holdings, LTD., 13,598 shares held by SF Retzloff Family Limited Partnership, LTD., 25,531 shares held by Retzloff Industries, Inc., and 136,446 shares held directly.

Footnotes explain that at the merger’s effective time, each outstanding share of Stellar common stock was cancelled and converted into the right to receive 0.3803 shares of Prosperity common stock plus $11.36 in cash per Stellar share. Outstanding restricted stock and performance unit awards also vested and were converted into the same per-share merger consideration or its cash value, leaving no remaining Stellar common stock holdings reported for Retzloff.

Positive

  • None.

Negative

  • None.
Insider Retzloff Steven F.
Role Executive Chairman
Type Security Shares Price Value
Disposition Common Stock 136,446 $0.00 --
Disposition Common Stock 25,531 $0.00 --
Disposition Common Stock 378,240 $0.00 --
Disposition Common Stock 12,598 $0.00 --
Holdings After Transaction: Common Stock — 0 shares (Direct, null); Common Stock — 0 shares (Indirect, By Retzloff Industries, Inc.)
Footnotes (1)
  1. Includes 89,251 shares of Company Common Stock (as defined below). On July 1, 2026 (the "Effective Time"), upon consummation of the transactions contemplated by the Agreement and Plan of Merger (the "Merger Agreement"), dated as of January 27, 2026, by and between Prosperity Bancshares, Inc., a Texas corporation ("Prosperity") and Stellar Bancorp, Inc., a Texas corporation (the "Company"), and subject to the terms and conditions set forth in the Merger Agreement, each share of the Company's common stock, par value $0.01 per share, ("Company Common Stock") outstanding immediately prior to the Effective Time was cancelled and converted into the right to receive (i) 0.3803 shares of common stock (the "Exchange Ratio"), par value $1.00 per share, of Prosperity ("Prosperity Common Stock") and (ii) an amount in cash equal to $11.36 (the "Per Share Cash Merger Consideration") ((i) and (ii) together, the "Per Share Merger Consideration"). Includes 12,672 shares of restricted stock. At the Effective Time, each outstanding restricted stock award in respect of Company Common Stock subject solely to service-based vesting, repurchase or other lapse restriction vested and was converted into the right to receive (without interest) the Per Share Merger Consideration. Includes (a) 12,075 performance unit awards (as defined below) granted in 2024, (b) 14,401 performance unit awards granted in 2025, and (c) 8,047 performance unit awards granted in 2026. At the Effective Time, each outstanding restricted unit award in respect of Company Common Stock subject to performance-based vesting (each, a "performance unit award") fully vested and was converted into the right to receive (without interest) a cash payment equal to the product of (a) the Per Share Merger Consideration Value multiplied by (b) the number of shares of Company Common Stock subject to such performance unit award, with applicable performance-based vesting conditions deemed achieved at 100% of the target level (or, in the case of the performance unit awards granted in 2024, 200% of the target level). At the Effective Time, upon consummation of the transactions contemplated by the Merger Agreement, and subject to the terms and conditions set forth in the Merger Agreement, each share of the Company Common Stock outstanding immediately prior to the Effective Time was cancelled and converted into the right to receive the Per Share Merger Consideration.
Disposition by Retzloff Holdings, LTD. 378,240 shares Common Stock, issuer disposition on July 1, 2026
Direct shares disposed 136,446 shares Common Stock, issuer disposition on July 1, 2026
Disposition by SF Retzloff Family Limited Partnership 13,598 shares Common Stock, issuer disposition on July 1, 2026
Disposition by Retzloff Industries, Inc. 25,531 shares Common Stock, issuer disposition on July 1, 2026
Stock component of merger consideration 0.3803 shares Prosperity common stock per Stellar share
Cash component of merger consideration $11.36 Cash per Stellar common share
Restricted stock included 12,672 shares Restricted Stellar common stock vesting at effective time
2024 performance unit awards 12,075 units Performance unit awards granted in 2024
Per Share Merger Consideration financial
"each share ... was cancelled and converted into the right to receive ... the "Per Share Merger Consideration""
Exchange Ratio financial
"to receive (i) 0.3803 shares of common stock (the "Exchange Ratio")"
The exchange ratio is the number used to decide how many shares of one company you get for each share you own in another company during a merger or acquisition. It’s like a recipe that tells you how to swap shares fairly, ensuring both companies’ values are balanced. This ratio matters because it determines how ownership divides between the companies' shareholders.
restricted stock financial
"Includes 12,672 shares of restricted stock. At the Effective Time, each outstanding restricted stock award"
Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.
performance unit award financial
"each outstanding restricted unit award ... subject to performance-based vesting (each, a "performance unit award")"
Agreement and Plan of Merger financial
"transactions contemplated by the Agreement and Plan of Merger (the "Merger Agreement")"
An Agreement and Plan of Merger is a formal document where two companies agree to combine into one, outlining how the process will happen. It’s like a step-by-step plan for merging, and it matters because it shows both sides have agreed on the details before the official transition takes place.
See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google
Add on Google
Learn about SEC filing dates
SEC Form 4
FORM 4UNITED 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
X
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*
Retzloff Steven F.

(Last)(First)(Middle)
9 GREENWAY PLAZA, SUITE 110

(Street)
HOUSTON TEXAS 77046

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Stellar Bancorp, Inc. [ STEL ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
Executive Chairman
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock07/01/2026D136,446D$0(1)(2)(3)0D
Common Stock07/01/2026D25,531D$0(4)0IBy Retzloff Industries, Inc.
Common Stock07/01/2026D378,240D$0(4)0IBy Retzloff Holdings, LTD.
Common Stock07/01/2026D12,598D$0(4)0IBy SF Retzloff Family Limited Partnership, LTD.
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Includes 89,251 shares of Company Common Stock (as defined below). On July 1, 2026 (the "Effective Time"), upon consummation of the transactions contemplated by the Agreement and Plan of Merger (the "Merger Agreement"), dated as of January 27, 2026, by and between Prosperity Bancshares, Inc., a Texas corporation ("Prosperity") and Stellar Bancorp, Inc., a Texas corporation (the "Company"), and subject to the terms and conditions set forth in the Merger Agreement, each share of the Company's common stock, par value $0.01 per share, ("Company Common Stock") outstanding immediately prior to the Effective Time was cancelled and converted into the right to receive (i) 0.3803 shares of common stock (the "Exchange Ratio"), par value $1.00 per share, of Prosperity ("Prosperity Common Stock") and (ii) an amount in cash equal to $11.36 (the "Per Share Cash Merger Consideration") ((i) and (ii) together, the "Per Share Merger Consideration").
2. Includes 12,672 shares of restricted stock. At the Effective Time, each outstanding restricted stock award in respect of Company Common Stock subject solely to service-based vesting, repurchase or other lapse restriction vested and was converted into the right to receive (without interest) the Per Share Merger Consideration.
3. Includes (a) 12,075 performance unit awards (as defined below) granted in 2024, (b) 14,401 performance unit awards granted in 2025, and (c) 8,047 performance unit awards granted in 2026. At the Effective Time, each outstanding restricted unit award in respect of Company Common Stock subject to performance-based vesting (each, a "performance unit award") fully vested and was converted into the right to receive (without interest) a cash payment equal to the product of (a) the Per Share Merger Consideration Value multiplied by (b) the number of shares of Company Common Stock subject to such performance unit award, with applicable performance-based vesting conditions deemed achieved at 100% of the target level (or, in the case of the performance unit awards granted in 2024, 200% of the target level).
4. At the Effective Time, upon consummation of the transactions contemplated by the Merger Agreement, and subject to the terms and conditions set forth in the Merger Agreement, each share of the Company Common Stock outstanding immediately prior to the Effective Time was cancelled and converted into the right to receive the Per Share Merger Consideration.
/s/ Justin M. Long, attorney-in-fact07/01/2026
** Signature of Reporting PersonDate
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)

FAQ

What insider transaction did STEL’s Executive Chairman report on July 1, 2026?

Steven F. Retzloff reported dispositions of Stellar Bancorp common stock to the issuer on July 1, 2026. These transactions reflect cancellation of his direct and entity-held shares as part of Stellar’s merger with Prosperity Bancshares at the merger’s effective time.

What happened to Steven Retzloff’s directly held STEL shares in the merger?

Steven Retzloff’s 136,446 directly held Stellar Bancorp common shares were cancelled at the merger’s effective time. Each share converted into the right to receive the defined per share merger consideration, leaving zero Stellar common shares reported following the transaction.

What per share consideration did STEL stockholders receive in the Prosperity merger?

Each outstanding Stellar Bancorp common share converted into 0.3803 shares of Prosperity Bancshares common stock plus $11.36 in cash. This combined stock-and-cash package is defined as the Per Share Merger Consideration in the agreement and related disclosures.

How were STEL restricted stock awards treated at the merger effective time?

Footnotes state 12,672 restricted shares vested at the effective time. Each such restricted stock award in Stellar common stock converted into the right to receive the same Per Share Merger Consideration, paid without interest, mirroring treatment of regular outstanding shares.

What happened to STEL performance unit awards held by Steven Retzloff?

Performance unit awards granted in 2024, 2025, and 2026 fully vested at the effective time. Each was converted into a cash payment equal to the Per Share Merger Consideration value multiplied by the related share count, with performance deemed achieved at specified target levels.