# EDGAR Filing Document

**Accession Number:** 0001473844
**File Stem:** 0001193125-26-242039
**Filing Date:** 2026-5
**Character Count:** 6814
**Document Hash:** 1b3301e35fb004cae2224ef98fcdde1b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-242039.hdr.sgml**: 20260527

**ACCESSION NUMBER**: 0001193125-26-242039

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 11

**CONFORMED PERIOD OF REPORT**: 20260527

**ITEM INFORMATION**: Submission of Matters to a Vote of Security Holders

**FILED AS OF DATE**: 20260527

**DATE AS OF CHANGE**: 20260527

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Stellar Bancorp, Inc.
- **CENTRAL INDEX KEY:** 0001473844
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATIONAL COMMERCIAL BANKS [6021]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 208339782
- **STATE OF INCORPORATION:** TX
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-38280
- **FILM NUMBER:** 261027048

**BUSINESS ADDRESS:**
- **STREET 1:** 9 GREENWAY PLAZA, SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
- **BUSINESS PHONE:** (713) 210-7600

**MAIL ADDRESS:**
- **STREET 1:** 9 GREENWAY PLAZA, SUITE 110
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Stellar Bancorp. Inc.
- **DATE OF NAME CHANGE:** 20221003

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CBTX, Inc.
- **DATE OF NAME CHANGE:** 20171011

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CBFH, Inc.
- **DATE OF NAME CHANGE:** 20091005

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### Form 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d)

#### of the Securities Exchange Act of 1934

#### Date of Report (Date of earliest event Reported): May 27, 2026

## Stellar Bancorp, Inc.

#### (Exact Name of Registrant as Specified in Charter)

---

| | | |
|:---|:---|:---|
| **Texas** | **001-38280** | **20-8339782** |
| **(State or Other Jurisdiction<br>of Incorporation)** | **(Commission**<br> **File Number)** | **(I.R.S. Employer<br>Identification Number)** |

---

#### 9 Greenway Plaza, Suite 110

#### Houston, Texas 77046

#### (Address of Principal Executive Offices) (Zip Code)
(713) 210-7600

#### (Registrant's telephone number, including area code)

#### (Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading<br>Symbol(s)** | **Name of each exchange<br>on which registered** |
| Common stock, par value $0.01 per share | STEL | New York Stock Exchange |
| Indicate by check mark whether |  |  |
|  |  | NYSE Texas |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

---

| | |
|:---|:---|
| **Item 5.07** | **Submission of Matters to a Vote of Security Holders.**  |

---

On May 27, 2026, Stellar Bancorp, Inc., a Texas corporation ("Stellar"), held a special meeting of shareholders of Stellar (the "Special Meeting") in connection with the proposed merger of Stellar and Prosperity Bancshares, Inc., a Texas corporation ("Prosperity"), pursuant to the Agreement and Plan of Merger, dated January 27, 2026 (the "Merger Agreement"), by and between Stellar and Prosperity.

There were 50,910,698 shares of common stock outstanding and entitled to vote as of the close of business on April 10, 2026, the record date for the Special Meeting. There were 39,327,868 shares of common stock represented at the Special Meeting by valid proxies or that voted at the Special Meeting, which was approximately 77.3% of the shares of common stock outstanding and entitled to vote at the Special Meeting and which constituted a quorum.

Set forth below are the matters voted upon at the Special Meeting, which are more fully described in the definitive proxy statement/prospectus filed by Stellar with the U.S. Securities and Exchange Commission on April 21, 2026, in connection with the Special Meeting, and the final voting results. The proposal to adjourn or postpone the Special Meeting, if necessary or appropriate, to solicit additional proxies if, immediately prior to such adjournment or postponement, there were not sufficient votes to approve the merger proposal or to ensure that any supplement or amendment to the proxy statement/prospectus was timely provided to holders of Stellar common stock, was not voted upon at the Special Meeting because there were sufficient votes cast to approve the merger proposal.

1. **Proposal to approve the Merger Agreement (as amended from time to time), by and between Stellar and Prosperity, and the transactions contemplated thereby, including the merger of Stellar with and into Prosperity (the "merger proposal").** 

Stellar's shareholders approved the merger proposal by the vote set forth below:

---

| | | |
|:---|:---|:---|
| **Votes For** | **Votes Against** | **Abstentions** |
| 39209984 | 59317 | 58567 |

---

2. **Proposal to approve, on a non-binding, advisory basis, the compensation that may be paid or become payable to Stellar's named executive officers that is based on or otherwise relates to the merger (the "merger compensation proposal").** 

Stellar's shareholders did not approve the non-binding, advisory merger compensation proposal by the vote set forth below:

---

| | | |
|:---|:---|:---|
| **Votes For** | **Votes Against** | **Abstentions** |
| 15683085 | 23385406 | 259377 |

---

------

#### SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **STELLAR BANCORP, INC.** | **STELLAR BANCORP, INC.** |
| Date: May 27, 2026 | By: | /s/ Paul P. Egge |
|  |  | Paul P. Egge |
|  |  | Chief Financial Officer |

---