Okan I. Akin - 01 Jul 2026 Form 4 Insider Report for Stellar Bancorp, Inc. (STEL)

Reporting relationship: Senior Executive VP, CRO
Issuer ticker: STEL
Reported as of: 01 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 01 Jul 2026, 07:40:10 UTC
Prior SEC filing: 17 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Justin M. Long, attorney-in-fact

Key filing fact

Okan I. Akin filed Form 4 for Stellar Bancorp, Inc. (STEL) on 01 Jul 2026.

Key facts

This page summarizes Okan I. Akin's Form 4 filing for Stellar Bancorp, Inc. (STEL).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 01 Jul 2026, 07:40.

Change

Previous filing in this sequence was filed on 17 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001764485 Primary reporting owner

Akin Okan I.

Relationship: Senior Executive VP, CRO
Address: 9 GREENWAY PLAZA, SUITE 110, HOUSTON
Signature: /s/ Justin M. Long, attorney-in-fact
Signature date: 01 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

STEL transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -85,951
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 01 Jul 2026
Ownership: Direct
Footnotes: F1, F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Okan I. Akin is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 3 footnotes

Footnote F1

Includes 66,891 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").

Footnote F2

Includes 6,757 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.

Footnote F3

Includes (a) 4,325 performance unit awards (as defined below) granted in 2024, (b) 5,123 performance unit awards granted in 2025, and (c) 2,855 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).