# EDGAR Filing Document

**Accession Number:** 0000854560
**File Stem:** 0001171843-26-004174
**Filing Date:** 2026-6
**Character Count:** 5824
**Document Hash:** 986f9c72faa722201a7e42516fe71bab
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001171843-26-004174.hdr.sgml**: 20260617

**ACCESSION NUMBER**: 0001171843-26-004174

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 14

**CONFORMED PERIOD OF REPORT**: 20260617

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260617

**DATE AS OF CHANGE**: 20260617

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** GREAT SOUTHERN BANCORP, INC.
- **CENTRAL INDEX KEY:** 0000854560
- **STANDARD INDUSTRIAL CLASSIFICATION:** STATE COMMERCIAL BANKS [6022]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 431524856
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-18082
- **FILM NUMBER:** 261098267

**BUSINESS ADDRESS:**
- **STREET 1:** 218 S GLENSTONE AVE
- **CITY:** SPRINGFIELD
- **STATE:** MO
- **ZIP:** 65802
- **BUSINESS PHONE:** 417-887-4400

**MAIL ADDRESS:**
- **STREET 1:** P O BOX 9009
- **CITY:** SPRINGFIELD
- **STATE:** MO
- **ZIP:** 65808-9009

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** GREAT SOUTHERN BANCORP INC
- **DATE OF NAME CHANGE:** 19920703

?xml version='1.0' encoding='ASCII'? Form 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): June 17, 2026
_______________________________

#### GREAT SOUTHERN BANCORP, INC.
(Exact name of registrant as specified in its charter)

_______________________________

---

| | | |
|:---|:---|:---|
| **Maryland** | **0-18082** | **43-1524856** |
| (State or Other Jurisdiction of Incorporation) | (Commission File Number) | (I.R.S. Employer Identification No.) |

---

#### 1451 East Battlefield

#### Springfield, Missouri 65804
(Address of Principal Executive Offices) (Zip Code)

(417) 887-4400

(Registrant's telephone number, including area code)

#### Not Applicable
(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 Symbol(s) | Name of each exchange on which registered |
| Common Stock, par value $0.01 per share | GSBC | The NASDAQ Stock Market LLC |

---

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 8.01. Other Events.**

On June 17, 2026, Great Southern Bancorp, Inc., the holding company for Great Southern Bank, declared a $0.43 per common share dividend for the second quarter of the calendar year ending December 31, 2026.

A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

**Item 9.01. Financial Statements and Exhibits.**

(d) Exhibits

<br> [99.1](exh_991.htm) [Press Release dated June 17, 2026](exh_991.htm) <br> 104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

#### 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.

---

| | | |
|:---|:---|:---|
|  | **GREAT SOUTHERN BANCORP, INC.** | **GREAT SOUTHERN BANCORP, INC.** |
| Date: June 17, 2026 | By: | <u>/s/ Joseph W. Turner&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u> |
|  |  | Joseph W. Turner |
|  |  | President and Chief Executive Officer |

---

## Exhibit 99.1

**EXHIBIT 99.1**

**Great Southern Bancorp, Inc. announces quarterly dividend of $0.43 per common share**

SPRINGFIELD, Mo., June 17, 2026 (GLOBE NEWSWIRE) -- The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.43 per common share dividend for the second quarter of the calendar year ending December 31, 2026.

The dividend will be payable on July 14, 2026, to stockholders of record on June 29, 2026. This dividend represents the 146<sup>th</sup> consecutive quarterly dividend paid by the Company to common stockholders.

**About Great Southern Bank**

Headquartered in Springfield, Missouri, Great Southern offers a broad range of banking services to customers. The Company operates 87 retail banking centers in Missouri, Iowa, Kansas, Minnesota, Arkansas and Nebraska and commercial lending offices in Atlanta, Charlotte, Chicago, Dallas, Denver, Omaha, and Phoenix. The common stock of Great Southern Bancorp, Inc. is listed on the Nasdaq Global Select Market under the symbol "GSBC."

**CONTACT:** 

Kincade Ayers,

Investor Relations,

(616) 233-0500

GSBC@lambert.com