GSBC / Great Southern Bancorp, Inc. - SEC-Einreichungen, Jahresbericht, Proxy Statement

Great Southern Bancorp, Inc.
US ˙ NasdaqGS ˙ US3909051076

Basisstatistiken
LEI 5493000ZL7DLNMN1AB26
CIK 854560
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Great Southern Bancorp, Inc.
SEC Filings (Chronological Order)
Auf dieser Seite finden Sie eine vollständige, chronologische Liste der SEC-Einreichungen, mit Ausnahme der Eigentumseinreichungen, die wir an anderer Stelle bereitstellen.
May 15, 2026 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 13, 2026 GREAT SOUTHERN BANCOR

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 13, 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

May 7, 2026 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2026 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as sp

April 16, 2026 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.58 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter Ended March 31, 2026

EXHIBIT 99.1 Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.58 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter Ended March 31, 2026 SPRINGFIELD, Mo., April 15, 2026 (GLOBE NEWSWIRE) - Great Southern Bancorp, Inc. (the “Company”) (NASDAQ:GSBC), the holding company for Great Southern Bank (the “Bank”), today reported that prel

April 16, 2026 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): April 15, 2026 GREAT SOUTHERN BAN

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): April 15, 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) (Commissi

April 16, 2026 EX-99.3

Loan Portfolio Presentation April 2026 Great Southern Bancorp. Inc (NASDAQ: GSBC) First Quarter Ended March 31, 2026 Consumer* $179,525 4% Single Family Real Estate $789,551 17% Multi - family Real Estate $1,369,294 30% Commercial Real Estate $1,583,

Exhibit 99.3 Loan Portfolio Presentation April 2026 Great Southern Bancorp. Inc (NASDAQ: GSBC) First Quarter Ended March 31, 2026 Consumer* $179,525 4% Single Family Real Estate $789,551 17% Multi - family Real Estate $1,369,294 30% Commercial Real Estate $1,583,124 35% Const & Land Dev $432,146 10% Commercial Business $180,182 4% Loan Portfolio by Category Gross Loans [in thousands] *Includes Hom

April 16, 2026 EX-99.2

Earnings Presentation April 2026 Great Southern Bancorp. Inc (NASDAQ: GSBC) First Quarter Ended March 31, 2026 Executive Management Team Joseph W. Turner joined Great Southern in 1991 and became an officer of Bancorp in 1995. He was appointed to the

Exhibit 99.2 Earnings Presentation April 2026 Great Southern Bancorp. Inc (NASDAQ: GSBC) First Quarter Ended March 31, 2026 Forward - Looking Statements When used in this presentation and in other documents filed or furnished by the Company with or to the Securities and Exchange Commission (the “SEC”), in the Company's other press releases or other public or stockholder communications, and in oral

March 31, 2026 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

March 31, 2026 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

March 18, 2026 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): March 18, 2026 GREAT SOUTHERN BAN

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): March 18, 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) (Commissi

March 18, 2026 EX-99.1

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

EXHIBIT 99.1 Great Southern Bancorp, Inc. announces quarterly dividend of $0.43 per common share SPRINGFIELD, Mo., March 18, 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 first quarter of the calendar year ending December 31, 2026. The dividend will be pay

March 6, 2026 EX-21

SUBSIDIARIES OF THE REGISTRANT

Exhibit 21 SUBSIDIARIES OF THE REGISTRANT Parent Subsidiary Percentage of Ownership State of Incorporation or Organization Great Southern Bancorp, Inc.

March 6, 2026 EX-10.8

Current Director Fee Arrangements

Exhibit 10.8 Current Director Fee Arrangements Directors of Great Southern Bancorp, Inc. (“Bancorp”) receive a fee of $1,500 per regular monthly meeting attended, which is the only compensation paid to directors by Bancorp, except for stock options which may be granted in the discretion of the Board of Directors under Bancorp’s 2022 Omnibus Incentive Plan. Directors of Great Southern Bank receive

March 6, 2026 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025 Commission file number 0-18082 GREAT SO

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025 Commission file number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 43-1524856 (State or other jurisdiction of inco

March 6, 2026 EX-10.7

Current Executive Officer Salary and Bonus Arrangements for 2026

Exhibit 10.7 Current Executive Officer Salary and Bonus Arrangements for 2026 Base Salaries The base salaries for 2026 for the following executive officers of Great Southern Bancorp, Inc. (the “Company”) and Great Southern Bank (the “Bank”) currently are as follows: Name and Title Base Salary William V. Turner $200,000 Chairman of the Board of the Company and the Bank Joseph W. Turner $470,722 Pre

February 17, 2026 EX-99.1

Great Southern Bancorp, Inc. to Hold 37th Annual Meeting of Stockholders Meeting to be virtual-only

EXHIBIT 99.1 Great Southern Bancorp, Inc. to Hold 37th Annual Meeting of Stockholders Meeting to be virtual-only SPRINGFIELD, Mo., Feb. 17, 2026 (GLOBE NEWSWIRE) - Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, will hold its 37th Annual Meeting of Stockholders at: 10 a.m. CDT Wednesday, May 13, 2026 Virtual Meeting (Webcast) This year’s Annual Meeting of S

February 17, 2026 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): February 17, 2026 GREAT SOUTHERN

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): February 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) (Commi

January 22, 2026 EX-99.3

Loan Portfolio Presentation January 2026 Great Southern Bancorp. Inc (NASDAQ: GSBC) Fourth Quarter Ended December 31, 2025 Consumer* $174,448 4% Single Family Real Estate $788,835 18% Multi - family Real Estate $1,387,410 31% Commercial Real Estate $

Exhibit 99.3 Loan Portfolio Presentation January 2026 Great Southern Bancorp. Inc (NASDAQ: GSBC) Fourth Quarter Ended December 31, 2025 Consumer* $174,448 4% Single Family Real Estate $788,835 18% Multi - family Real Estate $1,387,410 31% Commercial Real Estate $1,556,148 35% Const & Land Dev $349,161 8% Commercial Business $178,514 4% 2 Great Southern Bancorp. Inc | Loan Portfolio by Category Gro

January 22, 2026 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): January 21, 2026 GREAT SOUTHERN B

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): January 21, 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) (Commis

January 22, 2026 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Fourth Quarter Earnings of $1.45 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter and Year Ended December 31, 2025

EXHIBIT 99.1 Great Southern Bancorp, Inc. Reports Preliminary Fourth Quarter Earnings of $1.45 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter and Year Ended December 31, 2025 SPRINGFIELD, Mo., Jan. 21, 2026 (GLOBE NEWSWIRE) - Great Southern Bancorp, Inc. (the “Company”) (NASDAQ:GSBC), the holding company for Great Southern Bank (the “Bank”), today report

January 22, 2026 EX-99.2

Earnings Presentation January 2026 Great Southern Bancorp. Inc (NASDAQ: GSBC) Fourth Quarter Ended December 31, 2025 3 Great Southern Bancorp. Inc | Executive Management Team Joseph W. Turner joined Great Southern in 1991 and became an officer of Ban

Exhibit 99.2 Earnings Presentation January 2026 Great Southern Bancorp. Inc (NASDAQ: GSBC) Fourth Quarter Ended December 31, 2025 2 Great Southern Bancorp. Inc | Forward - Looking Statements When used in this presentation and in other documents filed or furnished by the Company with or to the Securities and Exchang e C ommission (the “SEC”), in the Company's other press releases or other public or

December 17, 2025 EX-99.1

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

EXHIBIT 99.1 Great Southern Bancorp, Inc. announces quarterly dividend of $0.43 per common share SPRINGFIELD, Mo., Dec. 17, 2025 (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 fourth quarter of the calendar year ending December 31, 2025. The dividend will be pay

December 17, 2025 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): December 17, 2025 GREAT SOUTHERN

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): December 17, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or Other Jurisdiction of Incorporation) (Commi

November 6, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant a

October 16, 2025 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): October 15, 2025 GREAT SOUTHERN B

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): October 15, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or Other Jurisdiction of Incorporation) (Commis

October 16, 2025 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Third Quarter Earnings of $1.56 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter Ended September 30, 2025

EXHIBIT 99.1 Great Southern Bancorp, Inc. Reports Preliminary Third Quarter Earnings of $1.56 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter Ended September 30, 2025 SPRINGFIELD, Mo., Oct. 15, 2025 (GLOBE NEWSWIRE) - Great Southern Bancorp, Inc. (the “Company”) (NASDAQ:GSBC), the holding company for Great Southern Bank (the “Bank”), today reported that p

October 16, 2025 EX-99.2

Earnings Presentation October 2025 Great Southern Bancorp. Inc (NASDAQ: GSBC) Third Quarter Ended September 30, 2025 Executive Management Team Joseph W. Turner joined Great Southern in 1991 and became an officer of Bancorp in 1995. He was appointed t

EXHIBIT 99.2 Earnings Presentation October 2025 Great Southern Bancorp. Inc (NASDAQ: GSBC) Third Quarter Ended September 30, 2025 Forward - Looking Statements When used in this presentation and in other documents filed or furnished by the Company with or to the Securities and Exchange Commission (the “SEC”), in the Company's other press releases or other public or stockholder communications, and i

October 16, 2025 EX-99.3

September 30, 2025 1 Loan Portfolio Gross Loans [in thousands] *Includes Home Equity Loans of $123,359 *Includes Home Equity Loans of $117,650 09 - 30 - 25 $4,543,707 Consumer* $171,519 4% Single Family Real Estate $802,384 17% Multi - family Real Es

EXHIBIT 99.3 September 30, 2025 1 Loan Portfolio Gross Loans [in thousands] *Includes Home Equity Loans of $123,359 *Includes Home Equity Loans of $117,650 09 - 30 - 25 $4,543,707 Consumer* $171,519 4% Single Family Real Estate $802,384 17% Multi - family Real Estate $1,485,546 33% Commercial Real Estate $1,530,990 34% Land Dev $322,969 7% Commercial Business Const & $230,299 5% 2 Loan Portfolio b

September 17, 2025 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): September 17, 2025 GREAT SOUTHERN

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): September 17, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or Other Jurisdiction of Incorporation) (Comm

September 17, 2025 EX-99.1

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

EXHIBIT 99.1 Great Southern Bancorp, Inc. announces quarterly dividend of $0.43 per common share SPRINGFIELD, Mo., Sept. 17, 2025 (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 third quarter of the calendar year ending December 31, 2025. The dividend will be pay

August 7, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as spe

July 17, 2025 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): July 16, 2025 GREAT SOUTHERN BANC

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): July 16, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or Other Jurisdiction of Incorporation) (Commissio

July 17, 2025 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Second Quarter Earnings of $1.72 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter Ended June 30, 2025

EXHIBIT 99.1 Great Southern Bancorp, Inc. Reports Preliminary Second Quarter Earnings of $1.72 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter Ended June 30, 2025 SPRINGFIELD, Mo., July 16, 2025 (GLOBE NEWSWIRE) - Great Southern Bancorp, Inc. (the “Company”) (NASDAQ:GSBC), the holding company for Great Southern Bank (the “Bank”), today reported that preli

July 17, 2025 EX-99.2

Earnings Presentation July 2025 Great Southern Bancorp. Inc (NASDAQ: GSBC) Second Quarter Ended June 30, 2025 Executive Management Team Joseph W. Turner joined Great Southern in 1991 and became an officer of Bancorp in 1995. He was appointed to the B

Exhibit 99.2 Earnings Presentation July 2025 Great Southern Bancorp. Inc (NASDAQ: GSBC) Second Quarter Ended June 30, 2025 Forward - Looking Statements When used in this presentation and in other documents filed or furnished by the Company with or to the Securities and Exchange Commission (the “SEC”), in the Company's other press releases or other public or stockholder communications, and in oral

July 16, 2025 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): July 16, 2025 GREAT SOUTHERN BANC

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): July 16, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

June 18, 2025 8-K

Financial Statements and Exhibits, Other Events

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 18, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or Other Jurisdiction of Incorporation) (Commissio

June 18, 2025 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share

EXHIBIT 99.1 Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share SPRINGFIELD, Mo., June 18, 2025 (GLOBE NEWSWIRE) - The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.40 per common share dividend for the second quarter of the calendar year ending December 31, 2025. The dividend will be pay

May 13, 2025 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 7, 2025 GREAT SOUTHERN BANCORP

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 7, 2025 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 F

May 7, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as sp

April 30, 2025 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): April 30, 2025 GREAT SOUTHERN BAN

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): April 30, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissi

April 17, 2025 EX-99.2

Earnings Presentation April 2025 Great Southern Bancorp. Inc (NASDAQ: GSBC) First Quarter Ended March 31, 2025 Executive Management Team Joseph W. Turner joined Great Southern in 1991 and became an officer of Bancorp in 1995. He was appointed to the

Exhibit 99.2 Earnings Presentation April 2025 Great Southern Bancorp. Inc (NASDAQ: GSBC) First Quarter Ended March 31, 2025 Forward - Looking Statements When used in this presentation and in other documents filed or furnished by Great Southern Bancorp, Inc. (the “Company”) with the Securities and Exchange Commission (the “SEC”), in the Company's other press releases or other public or stockholder

April 17, 2025 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.47 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter Ended March 31, 2025

EXHIBIT 99.1 Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.47 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter Ended March 31, 2025 SPRINGFIELD, Mo., April 16, 2025 (GLOBE NEWSWIRE) - Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, today reported that preliminary earnings for the thre

April 17, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): April 16, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or Other Jurisdiction of Incorporation) (Commissi

April 16, 2025 8-K

Regulation FD Disclosure

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): April 16, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissi

March 27, 2025 ARS

FORM ARS

Resilient Growth Building Long-Term Value Annual Report 2024Great Southern Bancorp, Inc.

March 27, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

March 27, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

March 19, 2025 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share

EXHIBIT 99.1 Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share SPRINGFIELD, Mo., March 19, 2025 (GLOBE NEWSWIRE) - The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.40 per common share dividend for the first quarter of the calendar year ending December 31, 2025. The dividend will be pay

March 19, 2025 8-K

Financial Statements and Exhibits, Other Events

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): March 19, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or Other Jurisdiction of Incorporation) (Commissi

March 7, 2025 EX-19

Insider trading policies and procedures

Exhibit 19 GREAT SOUTHERN BANCORP, INC. STATEMENT OF POLICY ON INSIDER TRADING The Need For An Insider Trading Policy The purchase or sale of Great Southern securities by a person while that person is aware of material non-public information about Great Southern, or the disclosure of material non-public information about Great Southern to others who then trade in Great Southern securities, is proh

March 7, 2025 EX-97

Great Southern Bancorp, Inc. Compensation Recovery Policy

Exhibit 97 GREAT SOUTHERN BANCORP, INC. COMPENSATION RECOVERY POLICY Board Approved 11/30/2023 The Board of Directors (the “Board”) of Great Southern Bancorp, Inc. (the “Company”) believes that it is in the best interests of the Company and its shareholders to adopt this Compensation Recovery Policy (the “Policy”), which provides for the recovery of certain incentive compensation in the event of a

March 7, 2025 EX-10.7

A description of the current salary and bonus arrangements for 2025 for the Registrant’s executive officers previously filed with the Commission as Exhibit 10.7 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024 is incorporated herein by reference as Exhibit 10.7.*

Exhibit 10.7 Current Executive Officer Salary and Bonus Arrangements for 2025 Base Salaries The base salaries for 2025 for the following executive officers of Great Southern Bancorp, Inc. (the “Company”) and Great Southern Bank (the “Bank”) currently are as follows: Name and Title Base Salary William V. Turner $200,000 Chairman of the Board of the Company and the Bank Joseph W. Turner $461,492 Pre

March 7, 2025 EX-21

Subsidiaries of the registrant

Exhibit 21 SUBSIDIARIES OF THE REGISTRANT Parent Subsidiary Percentage of Ownership State of Incorporation or Organization Great Southern Bancorp, Inc.

March 7, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 Commission file number 0-18082 GREAT SO

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 Commission file number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 43-1524856 (State or other jurisdiction of inco

March 7, 2025 EX-10.8

A description of the current fee arrangements for the Registrant’s directors previously filed with the Commission as Exhibit 10.8 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024 is incorporated herein by reference as Exhibit 10.8.*

Exhibit 10.8 Current Director Fee Arrangements Directors of Great Southern Bancorp, Inc. (“Bancorp”) receive a fee of $1,500 per regular monthly meeting attended, which is the only compensation paid to directors by Bancorp, except for stock options which may be granted in the discretion of the Board of Directors under Bancorp’s 2022 Omnibus Incentive Plan. Directors of Great Southern Bank receive

February 10, 2025 EX-99.1

Great Southern Bancorp, Inc. to Hold 36th Annual Meeting of Stockholders Meeting to be virtual-only

EXHIBIT 99.1 Great Southern Bancorp, Inc. to Hold 36th Annual Meeting of Stockholders Meeting to be virtual-only SPRINGFIELD, Mo., Feb. 10, 2025 (GLOBE NEWSWIRE) - Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, will hold its 36th Annual Meeting of Stockholders at: 10 a.m. CDT Wednesday, May 7, 2025 Virtual Meeting (Webcast) This year’s Annual Meeting of St

February 10, 2025 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): February 10, 2025 GREAT SOUTHERN

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): February 10, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or Other Jurisdiction of Incorporation) (Commi

January 22, 2025 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Fourth Quarter Earnings of $1.27 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter Ended December 31, 2024

EXHIBIT 99.1 Great Southern Bancorp, Inc. Reports Preliminary Fourth Quarter Earnings of $1.27 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter Ended December 31, 2024 SPRINGFIELD, Mo., Jan. 21, 2025 (GLOBE NEWSWIRE) - Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, today reported that preliminary earnings for the t

January 22, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): January 21, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or Other Jurisdiction of Incorporation) (Commis

January 21, 2025 8-K

Regulation FD Disclosure

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): January 21, 2025 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

December 18, 2024 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share

EXHIBIT 99.1 Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share SPRINGFIELD, Mo., Dec. 18, 2024 (GLOBE NEWSWIRE) - The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.40 per common share dividend for the fourth quarter of the calendar year ending December 31, 2024. The dividend will be pay

December 18, 2024 8-K

Financial Statements and Exhibits, Other Events

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): December 18, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or Other Jurisdiction of Incorporation) (Commi

November 6, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2024 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant a

October 17, 2024 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Third Quarter Earnings of $1.41 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter and Nine Months Ended September 30, 2024

EXHIBIT 99.1 Great Southern Bancorp, Inc. Reports Preliminary Third Quarter Earnings of $1.41 Per Diluted Common Share Preliminary Financial Results and Business Update for the Quarter and Nine Months Ended September 30, 2024 SPRINGFIELD, Mo., Oct. 16, 2024 (GLOBE NEWSWIRE) - Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, today reported that preliminary ea

October 17, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 16, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or Other Jurisdiction of Incorporation) (Commis

October 16, 2024 8-K

Regulation FD Disclosure

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): October 16, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

September 18, 2024 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share

Exhibit 99.1 September 18, 2024 Reporters May Contact: Kelly Polonus, Great Southern Bank, 417-895-5242 [email protected] Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share SPRINGFIELD, Mo. – The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.40 per common share dividend for

September 18, 2024 8-K

Financial Statements and Exhibits, Other Events

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): September 18, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Comm

August 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2024 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as spe

July 17, 2024 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Second Quarter Earnings of $1.45 Per Diluted Common Share

Exhibit 99.1 July 16, 2024 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Second Quarter Earnings of $1.45 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Six Months Ended June 30, 2024: · Significant or Non-Recurring Items: During the three mon

July 17, 2024 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): July 16, 2024 GREAT SOUTHERN BANC

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): July 16, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

July 16, 2024 8-K

Regulation FD Disclosure

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): July 16, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

June 20, 2024 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share

Exhibit 99.1 June 20, 2024 Reporters May Contact: Kelly Polonus, Great Southern Bank, 417-895-5242 [email protected] Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share SPRINGFIELD, Mo. – The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.40 per common share dividend for the s

June 20, 2024 8-K

Financial Statements and Exhibits, Other Events

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 20, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

May 14, 2024 8-K

Submission of Matters to a Vote of Security Holders

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 8, 2024 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 F

April 30, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2024 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as sp

April 18, 2024 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.13 Per Diluted Common Share

Exhibit 99.1 April 17, 2024 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.13 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter Ended March 31, 2024: · Significant or Non-Recurring Items: During the three months ended Marc

April 18, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): April 17, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissi

April 17, 2024 8-K

Regulation FD Disclosure

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): April 17, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissi

March 28, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

March 28, 2024 ARS

FORM ARS

2023 Annual Report for StockholdersCORPORATE HEADQUARTERS 1451 E. Battlefield Springfield, MO 65804 800-749-7113 MAILING ADDRESS P.O. Box 9009 Springfield, MO 65808 DIVIDEND REINVESTMENT For details on the automatic reinvestment of dividends in common stock of the Company, call Computershare at 800-368-5948, (outside of the U.S. 781-575-4223), or visit computershare.com. FORM 10-K The Annual Report o

March 28, 2024 DEFA14A

united states securities and exchange commission Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

united states securities and exchange commission Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

March 20, 2024 8-K

Financial Statements and Exhibits, Other Events

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): March 20, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissi

March 20, 2024 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share

Exhibit 99.1 March 20, 2024 Reporters May Contact: Kelly Polonus, Great Southern Bank, 417-895-5242 [email protected] Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share SPRINGFIELD, Mo. – The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.40 per common share dividend for the

March 12, 2024 EX-97

Great Southern Bancorp, Inc. Compensation Recovery Policy

Exhibit 97 GREAT SOUTHERN BANCORP, INC. COMPENSATION RECOVERY POLICY Board Approved 11/30/2023 The Board of Directors (the “Board”) of Great Southern Bancorp, Inc. (the “Company”) believes that it is in the best interests of the Company and its shareholders to adopt this Compensation Recovery Policy (the “Policy”), which provides for the recovery of certain incentive compensation in the event of a

March 12, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 Commission file number 0-18082 GREAT SO

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 Commission file number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 43-1524856 (State or other jurisdiction of inco

March 12, 2024 EX-10.8

A description of the current fee arrangements for the Registrant’s directors previously filed with the Commission as Exhibit 10.8 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023 is incorporated herein by reference as Exhibit 10.8.*

Exhibit 10.8 Current Director Fee Arrangements Directors of Great Southern Bancorp, Inc. (“Bancorp”) receive a fee of $1,500 per regular monthly meeting attended, which is the only compensation paid to directors by Bancorp, except for stock options which may be granted in the discretion of the Board of Directors under Bancorp's 2022 Omnibus Incentive Plan. Directors of Great Southern Bank receive

March 12, 2024 EX-21

Subsidiaries of the registrant

Exhibit 21 SUBSIDIARIES OF THE REGISTRANT Parent Subsidiary Percentage of Ownership State of Incorporation or Organization Great Southern Bancorp, Inc.

March 12, 2024 EX-10.7

A description of the current salary and bonus arrangements for 2024 for the Registrant’s executive officers previously filed with the Commission as Exhibit 10.7 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023 is incorporated herein by reference as Exhibit 10.7.*

Exhibit 10.7 Current Executive Officer Salary and Bonus Arrangements for 2024 Base Salaries The base salaries for 2024 for the following executive officers of Great Southern Bancorp, Inc. (the “Company”) and Great Southern Bank (the “Bank”) currently are as follows: Name and Title Base Salary William V. Turner $200,000 Chairman of the Board of the Company and the Bank Joseph W. Turner $448,050 Pre

February 9, 2024 SC 13G/A

GSBC / Great Southern Bancorp, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5 )* Great Southern Bancorp Inc (Name of Issuer) Common Stock (Title of Class of Securities) 390905107 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

January 29, 2024 EX-99.1

Great Southern Bancorp, Inc. to Hold 35th Annual Meeting of Stockholders Meeting to be virtual-only

Exhibit 99.1 January 29, 2024 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, 417-895-5242 [email protected] Great Southern Bancorp, Inc. to Hold 35th Annual Meeting of Stockholders Meeting to be virtual-only SPRINGFIELD, Mo. – Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, will hold its 35th Annual Meeting of Stockholders at: 10

January 29, 2024 8-K

Financial Statements and Exhibits, Other Events

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): January 29, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

January 26, 2024 SC 13G/A

GSBC / Great Southern Bancorp, Inc. / BlackRock Inc. Passive Investment

SC 13G/A 1 us3909051076012624.txt us3909051076012624.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 7) GREAT SOUTHERN BANCORP INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 390905107 - (CUSIP Number) December 31, 2023 - (Date of Event Which Requires Filing of this Statement) Check the appropr

January 23, 2024 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Fourth Quarter and Annual Earnings of $1.11 and $5.61 Per Diluted Common Share

Exhibit 99.1 January 22, 2024 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Fourth Quarter and Annual Earnings of $1.11 and $5.61 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Year Ended December 31, 2023: · Significant Non-Recurring Items: D

January 23, 2024 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): January 22, 2024 GREAT SOUTHERN B

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): January 22, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

January 22, 2024 8-K

Regulation FD Disclosure

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): January 22, 2024 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

December 22, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): December 20, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commi

December 22, 2023 EX-99.1

Great Southern Bancorp, Inc. Announces Appointment of Amelia “Amy” Counts to Boards of Directors

Exhibit 99.1 December 21, 2023 Reporters May Contact: Kelly Polonus, Great Southern Bancorp, 417-895-5242 [email protected] Great Southern Bancorp, Inc. Announces Appointment of Amelia “Amy” Counts to Boards of Directors Springfield, Mo. – Great Southern Bancorp, Inc., (NASDAQ:GSBC), the holding company for Great Southern Bank, announced today that Amelia “Amy” Counts has been appoint

December 20, 2023 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share

Exhibit 99.1 December 20, 2023 Reporters May Contact: Kelly Polonus, Great Southern Bank, 417-895-5242 [email protected] Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share SPRINGFIELD, Mo. – The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.40 per common share dividend for t

December 20, 2023 8-K

Financial Statements and Exhibits, Other Events

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): December 20, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commi

November 24, 2023 EX-99.1

Great Southern Bancorp, Inc. Expresses Sympathy on Passing of Board Member Larry D. Frazier

Exhibit 99.1 November 22, 2023 Reporters May Contact: Kelly Polonus, Great Southern Bank, 417-895-5242 [email protected] Great Southern Bancorp, Inc. Expresses Sympathy on Passing of Board Member Larry D. Frazier SPRINGFIELD, Mo. – Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, today announced with great sadness that Larry D. Frazier, a valued

November 24, 2023 8-K

Financial Statements and Exhibits, Other Events

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): November 21, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commi

November 7, 2023 EX-10.21

The form of Executive Officer Stock Option Alternative Cash Payment Election Form previously filed with the Commission as Exhibit 10.21 to the Registrant’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2023, is incorporated herein by reference as Exhibit 10.21.*

Exhibit 10.21 Executive Officer Stock Option Alternative Cash Payment Election Form BENEFIT DESCRIPTION – The Compensation Committee (the “Committee”) of the Board of Directors of Great Southern Bancorp, Inc. (the “Company”) has authorized the Company’s management to offer certain executive officers* who have expressed their intent to retire from their full-time executive officer position within t

November 7, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant a

October 19, 2023 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Third Quarter Earnings of $1.33 Per Diluted Common Share

Exhibit 99.1 October 18, 2023 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Third Quarter Earnings of $1.33 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Nine Months Ended September 30, 2023: • Significant Expense Item: During the three month

October 19, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 18, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

October 18, 2023 8-K

Regulation FD Disclosure

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): October 18, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

September 20, 2023 8-K

Financial Statements and Exhibits, Other Events

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): September 20, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Comm

September 20, 2023 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share

Exhibit 99.1 September 20, 2023 Reporters May Contact: Kelly Polonus, Great Southern Bank, 417-895-5242 [email protected] Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share SPRINGFIELD, Mo. – The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.40 per common share dividend for

August 7, 2023 8-K

Regulation FD Disclosure

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): August 7, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissi

August 4, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as spe

July 20, 2023 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): July 19, 2023 GREAT SOUTHERN BANC

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): July 19, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

July 20, 2023 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Second Quarter Earnings of $1.52 Per Diluted Common Share

Exhibit 99.1 July 19, 2023 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Second Quarter Earnings of $1.52 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Six Months Ended June 30, 2023: · Significant Expense Item: During the three months ended

July 19, 2023 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): July 19, 2023 GREAT SOUTHERN BANC

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): July 19, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

June 21, 2023 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 21, 2023 GREAT SOUTHERN BANC

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 21, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

June 21, 2023 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share

Exhibit 99.1 June 21, 2023 Reporters May Contact: Kelly Polonus, Great Southern Bank, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share SPRINGFIELD, Mo. – The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.40 per common share dividend for the

May 15, 2023 8-K

Submission of Matters to a Vote of Security Holders

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 10, 2023 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

May 8, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as sp

April 20, 2023 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): April 19, 2023 GREAT SOUTHERN BAN

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): April 19, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissi

April 20, 2023 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.67 Per Diluted Common Share

Exhibit 99.1 April 19, 2023 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.67 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter Ended March 31, 2023: · Significant Income and Expense Item: During the three months ended Mar

April 19, 2023 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): April 19, 2023 GREAT SOUTHERN BAN

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): April 19, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissi

March 31, 2023 ARS

ARS

2022 ANNUAL REPORT FOR STOCKHOLDERSCORPORATE HEADQUARTERS 1451 E. Battlefield Springfield, MO 65804 800-749-7113 MAILING ADDRESS P.O. Box 9009 Springfield, MO 65808 DIVIDEND REINVESTMENT For details on the automatic reinvestment of dividends in common stock of the Company, call Computershare at 800-368-5948, (outside of the U.S. 781-575-4223), or visit computershare.com. FORM 10-K The Annual Report o

March 31, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

March 31, 2023 DEFA14A

united states securities and exchange commission Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

united states securities and exchange commission Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

March 15, 2023 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): March 15, 2023 GREAT SOUTHERN BAN

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): March 15, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissi

March 15, 2023 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share

Exhibit 99.1 March 15, 2023 Reporters May Contact: Kelly Polonus, Great Southern Bank, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share SPRINGFIELD, Mo. – The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.40 per common share dividend for th

March 13, 2023 EX-10.8

A description of the current fee arrangements for the Registrant’s directors is attached as Exhibit 10.8.*

Exhibit 10.8 Current Director Fee Arrangements Directors of Great Southern Bancorp, Inc. (“Bancorp”) receive a monthly fee of $1,500 per regular monthly meeting attended, which is the only compensation paid to directors by Bancorp, except for stock options which may be granted in the discretion of the Board of Directors under Bancorp's 2022 Omnibus Incentive Plan. Directors of Great Southern Bank

March 13, 2023 EX-10.7

A description of the current salary and bonus arrangements for the Registrant’s executive officers for 2023 is attached as Exhibit 10.7.*

Exhibit 10.7 Current Executive Officer Salary and Bonus Arrangements for 2023 Base Salaries The base salaries for 2023 for the following executive officers of Great Southern Bancorp, Inc. (the "Company") and Great Southern Bank (the "Bank") currently are as follows: Name and Title Base Salary William V. Turner $ 200,000 Chairman of the Board of the Company and the Bank Joseph W. Turner $ 435,000 P

March 13, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 Commission file number 0-18082 GREAT SO

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 Commission file number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 43-1524856 (State or other jurisdiction of inco

March 13, 2023 EX-21

Subsidiaries of the registrant

Exhibit 21 SUBSIDIARIES OF THE REGISTRANT Parent Subsidiary Percentage of Ownership State of Incorporation or Organization Great Southern Bancorp, Inc.

February 10, 2023 SC 13G/A

GSBC / Great Southern Bancorp, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4 )* Great Southern Bancorp Inc (Name of Issuer) Common Stock (Title of Class of Securities) 390905107 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate

February 1, 2023 SC 13G/A

GSBC / Great Southern Bancorp, Inc. / BlackRock Inc. Passive Investment

SC 13G/A 1 us3909051076013123.txt us3909051076013123.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 6) GREAT SOUTHERN BANCORP INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 390905107 - (CUSIP Number) December 31, 2022 - (Date of Event Which Requires Filing of this Statement) Check the appropr

January 30, 2023 EX-99.1

Great Southern Bancorp, Inc. to Hold 34th Annual Meeting of Stockholders Meeting to be virtual-only

Exhibit 99.1 January 30, 2023 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, 1.417.895.5242 [email protected] Great Southern Bancorp, Inc. to Hold 34th Annual Meeting of Stockholders Meeting to be virtual-only SPRINGFIELD, Mo. – Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, will hold its 34th Annual Meeting of Stockholders at:

January 30, 2023 8-K

Financial Statements and Exhibits, Other Events

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): January 30, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

January 24, 2023 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Fourth Quarter and Annual Earnings of $1.84 and $6.02 Per Diluted Common Share

Exhibit 99.1 January 23, 2023 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Fourth Quarter and Annual Earnings of $1.84 and $6.02 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Year Ended December 31, 2022: · Significant Income and Expense Ite

January 24, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): January 23, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

January 23, 2023 8-K

Regulation FD Disclosure

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): January 23, 2023 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

December 21, 2022 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share and approval of stock repurchase program

Exhibit 99.1 December 21, 2022 Reporters May Contact: Kelly Polonus, Great Southern Bank, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. announces quarterly dividend of $0.40 per common share and approval of stock repurchase program SPRINGFIELD, Mo. ? The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, decla

December 21, 2022 8-K

Financial Statements and Exhibits, Other Events

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): December 21, 2022 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commi

November 8, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ACT OF 1934 For the Quarterly Period Ended September 30, 2022 ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as spe

October 20, 2022 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Third Quarter Earnings of $1.46 Per Diluted Common Share

Exhibit 99.1 October 19, 2022 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Third Quarter Earnings of $1.46 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Nine Months Ended September 30, 2022: ? Significant Income and Expense Items: During the

October 20, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 19, 2022 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

October 19, 2022 8-K

Regulation FD Disclosure

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): October 19, 2022 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

August 25, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): August 24, 2022 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commiss

August 25, 2022 EX-99.1

Great Southern Bancorp, Inc. Announces Appointment of Steven D. Edwards to Boards of Directors

Exhibit 99.1 August 25, 2022 Reporters May Contact: Kelly Polonus, Great Southern Bancorp, 1.417.895.5242 [email protected] Great Southern Bancorp, Inc. Announces Appointment of Steven D. Edwards to Boards of Directors Springfield, Mo. ? Great Southern Bancorp, Inc., (NASDAQ:GSBC), the holding company for Great Southern Bank, announced today that Steven D. Edwards has been appointed t

August 8, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ACT OF 1934 For the Quarterly Period Ended June 30, 2022 ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specifie

July 21, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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) July 20, 2022 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

July 21, 2022 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Second Quarter Earnings of $1.44 Per Diluted Common Share

Exhibit 99.1 July 20, 2022 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Second Quarter Earnings of $1.44 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Six Months Ended June 30, 2022: ? Significant Income and Expense Items: During the three m

July 20, 2022 8-K

Regulation FD Disclosure

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): July 20, 2022 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

June 17, 2022 EX-99.2

The form of incentive stock option award agreement under the Registrant’s 2022 Omnibus Incentive Plan previously filed with the Commission as Exhibit 99.2 to the Registrant’s Registration Statement on Form S-8 (File No. 333-265683) filed on June 17, 2022 is incorporated herein by reference as Exhibit 10.19.*

Exhibit 99.2 GREAT SOUTHERN BANCORP, INC. 2022 OMNIBUS INCENTIVE PLAN INCENTIVE STOCK OPTION AGREEMENT ISO NO. ?GrantNumber? This option, intended to qualify as an Incentive Stock Option under Section 422 of the Internal Revenue Code of 1986, as amended, is granted as of ?GrantDate? by Great Southern Bancorp, Inc. (the ?Company?) to ?FullName? (the ?Optionee?), in accordance with the following ter

June 17, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Great Southern Bancorp, Inc.

June 17, 2022 EX-99.3

The form of non-qualified stock option award agreement under the Registrant’s 2022 Omnibus Incentive Plan previously filed with the Commission as Exhibit 99.3 to the Registrant’s Registration Statement on Form S-8 (File No. 333-265683) filed on June 17, 2022 is incorporated herein by reference as Exhibit 10.20.*

Exhibit 99.3 GREAT SOUTHERN BANCORP, INC. 2022 OMNIBUS INCENTIVE PLAN NON-QUALIFIED STOCK OPTION AGREEMENT NQSO NO. ?GrantNumber? This option, intended to be a Non-Qualified Stock Option, is granted as of ?GrantDate? by Great Southern Bancorp, Inc. (the ?Company?) to ?FullName? (the ?Optionee?), in accordance with the following terms and conditions: 1. Option Grant and Exercise Period. The Company

June 17, 2022 S-8

As filed with the Securities and Exchange Commission on June 17, 2022

As filed with the Securities and Exchange Commission on June 17, 2022 Registration No.

June 15, 2022 EX-99.1

Great Southern Bancorp, Inc. announces 11% increase in quarterly dividend

Exhibit 99.1 June 15, 2022 Reporters May Contact: Kelly Polonus, Great Southern Bank, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. announces 11% increase in quarterly dividend SPRINGFIELD, Mo. ? The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.40 per common share dividend for the second qu

June 15, 2022 8-K

Financial Statements and Exhibits, Other Events

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 15, 2022 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

May 12, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders

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 11, 2022 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

May 6, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ACT OF 1934 For the Quarterly Period Ended March 31, 2022 ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specifi

April 21, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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) April 20, 2022 GREAT SOUTHERN BANCORP, INC. (Exact name of Registrant as specified in its Charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

April 21, 2022 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.30 Per Diluted Common Share

Exhibit 99.1 April 20, 2022 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.30 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter Ended March 31, 2022: ? Significant Income and Expense Items: During the three months ended Ma

April 20, 2022 8-K

Regulation FD Disclosure

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): April 20, 2022 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissi

March 31, 2022 DEFA14A

united states securities and exchange commission Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

united states securities and exchange commission Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

March 31, 2022 DEF 14A

Proposal III. Approval of the 2022 Omnibus Incentive Plan

united states securities and exchange commission Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

March 16, 2022 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.36 per common share

Exhibit 99.1 March 16, 2022 Reporters May Contact: Kelly Polonus, Great Southern Bank, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. announces quarterly dividend of $0.36 per common share SPRINGFIELD, Mo. ? The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.36 per common share dividend for th

March 16, 2022 8-K

Financial Statements and Exhibits, Other Events

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): March 16, 2022 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissi

March 7, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 Commission file number 0-18082 GREAT SO

Table of Contents ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

March 7, 2022 EX-21

Subsidiaries of the registrant

Exhibit 21 SUBSIDIARIES OF THE REGISTRANT Parent Subsidiary Percentage of Ownership State of Incorporation or Organization ? ? ? ? ? ? ? ? Great Southern Bancorp, Inc.

March 7, 2022 EX-10.8

A description of the current fee arrangements for the Registrant’s directors previously filed with the Commission as Exhibit 10.8 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022 is incorporated herein by reference as Exhibit 10.8.*

? Exhibit 10.8 ? Current Director Fee Arrangements ? Directors of Great Southern Bancorp, Inc. ("Bancorp") receive a monthly fee of $1,500 per regular monthly meeting attended, which is the only compensation paid to directors by Bancorp, except for stock options which may be granted in the discretion of the Board of Directors under Bancorp's 2018 Omnibus Incentive Plan. Directors of Great Southern

March 7, 2022 EX-10.7

A description of the current salary and bonus arrangements for 2023 for the Registrant’s executive officers previously filed with the Commission as Exhibit 10.7 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022 is incorporated herein by reference as Exhibit 10.7.*

? Exhibit 10.7 ? Current Named Executive Officer Salary and Bonus Arrangements for 2022 ? Base Salaries ? The base salaries for 2022 for the following executive officers of Great Southern Bancorp, Inc. (the?Company?) and Great Southern Bank (the ?Bank?) currently are as follows: ? Name and Title Base Salary ? ? ? William V. Turner $200,000 Chairman of the Board of the Company and the Bank ? Joseph

February 8, 2022 SC 13G/A

GSBC / Great Southern Bancorp, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3 )* Great Southern Bancorp Inc (Name of Issuer) Common Stock (Title of Class of Securities) 390905107 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 1, 2022 SC 13G/A

GSBC / Great Southern Bancorp, Inc. / BlackRock Inc. Passive Investment

SC 13G/A 1 us3909051076020122.txt us3909051076020122.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 5) GREAT SOUTHERN BANCORP INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 390905107 - (CUSIP Number) December 31, 2021 - (Date of Event Which Requires Filing of this Statement) Check the appropr

January 31, 2022 8-K

Financial Statements and Exhibits, Other Events

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): January 31, 2022 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

January 31, 2022 EX-99.1

Great Southern Bancorp, Inc. to Hold 33rd Annual Meeting of Stockholders Meeting to be virtual-only due to COVID-19 pandemic

Exhibit 99.1 January 31, 2022 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, 1.417.895.5242 [email protected] Great Southern Bancorp, Inc. to Hold 33rd Annual Meeting of Stockholders Meeting to be virtual-only due to COVID-19 pandemic SPRINGFIELD, Mo. ? Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, will hold its 33rd Annual Mee

January 25, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): January 24, 2022 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

January 25, 2022 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Fourth Quarter and Annual Earnings of $1.14 and $5.46 Per Diluted Common Share

Exhibit 99.1 January 24, 2022 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Fourth Quarter and Annual Earnings of $1.14 and $5.46 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Year Ended December 31, 2021: ? CECL Adoption: As previously discl

January 24, 2022 8-K

Regulation FD Disclosure

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): January 24, 2022 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

December 16, 2021 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend of $0.36 per common share

Exhibit 99.1 December 15, 2021 Reporters May Contact: Kelly Polonus, Great Southern Bank, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. announces quarterly dividend of $0.36 per common share SPRINGFIELD, Mo. ? The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.36 per common share dividend for

December 16, 2021 8-K

Financial Statements and Exhibits, Other Events

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): December 15, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commi

November 22, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): November 17, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commi

November 22, 2021 EX-10.2

Amendment No. 2, dated as of November 17, 2021, to the Amended and Restated Employment Agreement, dated as of November 4, 2019, between the Registrant and Joseph W. Turner, previously filed with the Commission (File No. 000-18082) as Exhibit 10.2 to the Registrant’s Current Report on Form 8-K filed on November 22, 2021, is incorporated herein by reference as Exhibit 10.4B.*

Exhibit 10.2 AMENDMENT NO. 2 to the AMENDED AND RESTATED EMPLOYMENT AGREEMENT With JOSEPH W. TURNER This AMENDMENT NO. 2 (the ?Amendment?) to the Amended and Restated Employment Agreement between Great Southern Bancorp, Inc. (the ?Company?), and Joseph W. Turner (the ?Employee?) dated as of November 4, 2019 (the ?2019 Employment Agreement?), is made and entered into as of the 17th day of November

November 22, 2021 EX-10.1

Amendment No. 1, dated as of November 17, 2021, to the Amended and Restated Employment Agreement, dated as of November 4, 2019, between the Registrant and William V. Turner, previously filed with the Commission (File No. 000-18082) as Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on November 22, 2021, is incorporated herein by reference as Exhibit 10.3A.*

Exhibit 10.1 AMENDMENT NO. 1 to the AMENDED AND RESTATED EMPLOYMENT AGREEMENT With WILLIAM V. TURNER This AMENDMENT NO. 1 (the ?Amendment?) to the Amended and Restated Employment Agreement between Great Southern Bancorp, Inc. (the ?Company?), and William V. Turner (the ?Employee?) dated as of November 4, 2019 (the ?2019 Employment Agreement?), is made and entered into as of the 17th day of Novembe

November 5, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ACT OF 1934 For the Quarterly Period Ended September 30, 2021 ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as spe

October 21, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 20, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

October 21, 2021 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Third Quarter Earnings of $1.49 Per Diluted Common Share

Exhibit 99.1 October 20, 2021 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Third Quarter Earnings of $1.49 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Nine Months Ended September 30, 2021: ? CECL Adoption: As previously disclosed, effectiv

October 20, 2021 8-K

Regulation FD Disclosure

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): October 20, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

August 5, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ACT OF 1934 For the Quarterly Period Ended June 30, 2021 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in

August 2, 2021 8-K

Regulation FD Disclosure

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): August 2, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissi

July 22, 2021 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Second Quarter Earnings of $1.46 Per Diluted Common Share

Exhibit 99.1 July 21, 2021 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Second Quarter Earnings of $1.46 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Six Months Ended June 30, 2021: ? CECL Adoption: As previously disclosed, effective Januar

July 22, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): July 21, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

July 21, 2021 8-K

Regulation FD Disclosure

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): July 21, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

June 30, 2021 8-K

Other Events

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 30, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

June 22, 2021 8-K

Regulation FD Disclosure

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 22, 2021 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

May 17, 2021 8-K

Submission of Matters to a Vote of Security Holders

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 12, 2021 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

May 6, 2021 10-Q

Quarterly Report - FORM 10-Q

? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ACT OF 1934 For the Quarterly Period Ended March 31, 2021 ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specifi

April 22, 2021 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.36 Per Diluted Common Share

Exhibit 99.1 April 21, 2021 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.36 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter Ended March 31, 2021: ? CECL Adoption: Effective January 1, 2021, Great Southern Bancorp, Inc.

April 22, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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) April 21, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

April 21, 2021 8-K

Regulation FD Disclosure

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) April 21, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

April 1, 2021 DEF 14A

- DEF 14A

united states securities and exchange commission Washington, D.C. 20549 Schedule 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) x Defin

April 1, 2021 DEFA14A

- DEFA14A

united states securities and exchange commission Washington, D.C. 20549 Schedule 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defin

March 5, 2021 10-K

Annual Report - FORM 10-K

Table of Contents ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

March 5, 2021 EX-10.8

A description of the current fee arrangements for the Registrant’s directors is attached as Exhibit 10.8.*

Exhibit 10.8 ? Current Director Fee Arrangements ? Directors of Great Southern Bancorp, Inc. ("Bancorp") receive a monthly fee of $1,500 per regular monthly meeting attended, which is the only compensation paid to directors by Bancorp, except for stock options which may be granted in the discretion of the Board of Directors under Bancorp's 2018 Omnibus Incentive Plan. Directors of Great Southern B

March 5, 2021 EX-21

Subsidiaries of the registrant

Exhibit 21 ? SUBSIDIARIES OF THE REGISTRANT ? Parent Subsidiary Percentage of Ownership State of Incorporation or Organization ? ? ? ? ? ? ? ? ? ? ? ? ? ? Great Southern Bancorp, Inc.

March 5, 2021 EX-10.7

A description of the current salary and bonus arrangements for 2021 for the Registrant’s executive officers previously filed with the Commission as Exhibit 10.7 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020 is incorporated herein by reference as Exhibit 10.7.*

Exhibit 10.7 ? Current Named Executive Officer Salary and Bonus Arrangements for 2021 ? Base Salaries ? The base salaries for 2021 for the following executive officers of Great Southern Bancorp, Inc. (the "Company") and Great Southern Bank (the "Bank") currently are as follows: ? Name and Title Base Salary ? ? ? William V. Turner $200,000 Chairman of the Board of the Company and the Bank ? Joseph

February 12, 2021 SC 13G/A

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* Great Southern Bancorp Inc (Name of Issuer) Common Stock (Title of Class of Securities) 390905107 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 1, 2021 8-K

Financial Statements and Exhibits, Other Events - 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): February 1, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

February 1, 2021 EX-99.1

Great Southern Bancorp, Inc. to Hold 32nd Annual Meeting of Stockholders Meeting to be virtual-only due to COVID-19 pandemic

EX-99.1 2 tm214728d1ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 February 1, 2021 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, 1.417.895.5242 [email protected] Great Southern Bancorp, Inc. to Hold 32nd Annual Meeting of Stockholders Meeting to be virtual-only due to COVID-19 pandemic SPRINGFIELD, Mo. – Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great

January 29, 2021 SC 13G/A

SC 13G/A

us3909051076012921.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 4) GREAT SOUTHERN BANCORP INC - (Name of Issuer) Common Stock - (Title of Class of Securities) 390905107 - (CUSIP Number) December 31, 2020 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pur

January 26, 2021 EX-99.1

Great Southern Bancorp, Inc. Reports Preliminary Fourth Quarter and Annual Earnings of $1.28 and $4.21 Per Diluted Common Share

Exhibit 99.1 January 25, 2021 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Fourth Quarter and Annual Earnings of $1.28 and $4.21 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Year Ended December 31, 2020: · CECL Adoption: The recently-enacte

January 26, 2021 8-K

Financial Statements and Exhibits - 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): January 25, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

January 25, 2021 8-K

Regulation FD Disclosure - 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) January 25, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of Registrant as specified in its Charter) Maryland 000-18082 43-1524856 (State or other jurisdiction of incorporation) (Commi

January 20, 2021 8-K

Other Events - 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) January 20, 2021 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 000-18082 43-1524856 (State or other jurisdiction of incorporation) (Commi

December 16, 2020 EX-99

Great Southern Bancorp, Inc. announces quarterly dividend

July 31, 2002 Exhibit 99.1 December 16, 2020 Reporters May Contact: Kelly Polonus, Great Southern Bank, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. announces quarterly dividend SPRINGFIELD, Mo. – The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.34 per common share dividend for the fourth

December 16, 2020 8-K

Financial Statements and Exhibits, Other Events - GREAT SOUTHERN BANCORP, INC. - FORM 8-K SEC FILING

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) December 16, 2020 GREAT SOUTHERN BANCORP, INC. (Exact name of Registrant as specified in its Charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commis

November 9, 2020 8-K

Regulation FD Disclosure - GREAT SOUTHERN BANCORP, INC. - FORM 8-K SEC FILING

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) November 9, 2020 GREAT SOUTHERN BANCORP, INC. (Exact name of Registrant as specified in its Charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commiss

November 6, 2020 10-Q

Quarterly Report - GREAT SOUTHERN BANCORP, INC. - FORM 10-Q SEC FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ACT OF 1934 For the Quarterly Period Ended September 30, 2020 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specifi

October 22, 2020 EX-99

Great Southern Bancorp, Inc. Reports Preliminary Third Quarter Earnings of $0.96 Per Diluted Common Share

EXHIBIT 99.1 October 21, 2020 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Third Quarter Earnings of $0.96 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Nine Months Ended September 30, 2020: ·Significant Unusual Income or Expense Items: Duri

October 22, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - GREAT SOUTHERN BANCORP, INC. - FORM 8-K SEC FILING

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) October 21, 2020 GREAT SOUTHERN BANCORP, INC. (Exact name of Registrant as specified in its Charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commiss

October 21, 2020 8-K

Regulation FD Disclosure - GREAT SOUTHERN BANCORP, INC. - FORM 8-K SEC FILING

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) October 21, 2020 GREAT SOUTHERN BANCORP, INC. (Exact name of Registrant as specified in its Charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commiss

September 16, 2020 EX-99.1

Great Southern Bancorp, Inc. announces quarterly dividend

Exhibit 99.1 September 16, 2020 Reporters May Contact: Kelly Polonus, Great Southern Bank, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. announces quarterly dividend SPRINGFIELD, Mo. – The Board of Directors of Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Great Southern Bank, declared a $0.34 per common share dividend for the third quarter of the

September 16, 2020 8-K

Financial Statements and Exhibits, Other Events - 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) September 16, 2020 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 000-18082 43-1524856 (State or other jurisdiction of incorporation) (Com

August 7, 2020 10-Q

Quarterly Report - GREAT SOUTHERN BANCORP, INC. - FORM 10-Q SEC FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ACT OF 1934 For the Quarterly Period Ended June 30, 2020 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in

July 28, 2020 8-K

Regulation FD Disclosure

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) July 27, 2020 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

July 21, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - GREAT SOUTHERN BANCORP, INC. - FORM 8-K SEC FILING

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) July 20, 2020 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

July 21, 2020 EX-99

Great Southern Bancorp, Inc. Reports Preliminary Second Quarter Earnings of $0.93 Per Diluted Common Share

Exhibit 99.1 July 20, 2020 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] Great Southern Bancorp, Inc. Reports Preliminary Second Quarter Earnings of $0.93 Per Diluted Common Share Preliminary Financial Results and Other Matters for the Quarter and Six Months Ended June 30, 2020: ·Total Loans: Total gross loans (including the undisbursed

July 20, 2020 8-K

Regulation FD Disclosure -

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) July 20, 2020 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

June 22, 2020 8-K

Other Events

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, 2020 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

June 12, 2020 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

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 10, 2020 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified in its charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

June 12, 2020 EX-4.1

The Indenture, dated June 12, 2020, between the Registrant and U.S. Bank National Association, as Trustee, previously filed with the Commission (File No. 000-18082) as Exhibit 4.1 to the Registrant’s Current Report on Form 8-K filed on June 12, 2020, is incorporated herein by reference as Exhibit 4.1.

Exhibit 4.1 Execution Version GREAT SOUTHERN BANCORP, INC. Issuer And U.S. BANK NATIONAL ASSOCIATION Trustee INDENTURE Dated as of June 12, 2020 SUBORDINATED DEBT SECURITIES CROSS-REFERENCE TABLE CERTAIN SECTIONS OF THIS INDENTURE RELATING TO SECTIONS 310 THROUGH 318, INCLUSIVE, OF THE TRUST INDENTURE ACT OF 1939 Trust Indenture Act Section Indenture Section §310(a)(1) 609 (a)(2) 609 (a)(3) Not Ap

June 12, 2020 EX-4.2

The First Supplemental Indenture, dated June 12, 2020, between the Registrant and U.S. Bank National Association, as Trustee (relating to the Registrant’s 5.50% Fixed-to-Floating Rate Subordinated Notes due June 15, 2030), including the form of subordinated note included therein, previously filed with the Commission (File No. 000-18082) as Exhibit 4.2 to the Registrant’s Current Report on Form 8-K filed on June 12, 2020, is incorporated herein by reference as Exhibit 4.2.

Exhibit 4.2 Execution Version GREAT SOUTHERN BANCORP, INC. Issuer And U.S. BANK NATIONAL ASSOCIATION Trustee FIRST SUPPLEMENTAL INDENTURE Dated as of June 12, 2020 to the Indenture Dated as of June 12, 2020 5.50% Fixed-to-Floating Rate Subordinated Notes due 2030 FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of June 12, 2020, between GREAT SOUTHERN BANCORP, INC., a Marylan

June 12, 2020 EX-99.1

GREAT SOUTHERN BANCORP, INC. ANNOUNCES PRICING OF SUBORDINATED NOTES OFFERING

Exhibit 99.1 June 10, 2020 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 [email protected] GREAT SOUTHERN BANCORP, INC. ANNOUNCES PRICING OF SUBORDINATED NOTES OFFERING SPRINGFIELD, MO. – Great Southern Bancorp, Inc. (NASDAQ: GSBC) (the “Company”), the holding company for Great Southern Bank (the “Bank”), today announced the pricing of its public offerin

June 12, 2020 EX-1.1

Underwriting Agreement, dated June 10, 2020, between Great Southern Bancorp, Inc. and Piper Sandler & Co. and Keefe, Bruyette & Woods, Inc., as representative of the Underwriters named in Schedule A thereto

Exhibit 1.1 Execution Version $75,000,000 Aggregate Principal Amount of 5.50% Fixed-to-Floating Rate Subordinated Notes due June 15, 2030 Great Southern Bancorp, Inc. UNDERWRITING AGREEMENT June 10, 2020 PIPER SANDLER & CO. KEEFE, BRUYETTE & WOODS, INC. As Representatives of the several Underwriters named in Schedule A hereto c/o Piper Sandler Companies 1251 Avenue of the Americas, 6th Floor New Y

June 11, 2020 424B5

5.50% Fixed-to-Floating Rate Subordinated Notes due June 15, 2030

TABLE OF CONTENTS   Filed Pursuant to Rule 424(b)(5)  Registrant No. 333-237548 Prospectus Supplement (To Prospectus dated April 15, 2020) $75,000,000 5.50% Fixed-to-Floating Rate Subordinated Notes due June 15, 2030 We are offering $75.0 million aggregate principal amount of our 5.50% Fixed-to-Floating Rate Subordinated Notes due June 15, 2030, referred to herein as the “Notes.” The Notes will ma

June 10, 2020 FWP

5.50% Fixed to Floating Rate Subordinated Notes due 2030 Term Sheet

Free Writing Prospectus Filed pursuant to Rule 433 Supplementing the Preliminary Prospectus Supplement, dated June 8, 2020 Registration No.

June 8, 2020 EX-99.1

June 2020

Exhibit 99.1 June 2020 Safe Harbor/Legal Disclaimer This presentation contains statements that are considered forward - looking statements within the meaning of and are intended to b e covered by the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward - looking statements typically are identified with use of terms such as “may,” “might,” “will,” “would,” “should

June 8, 2020 424B5

SUBJECT TO COMPLETION DATED JUNE 8, 2020

TABLE OF CONTENTS The information contained in this preliminary prospectus supplement is not complete and may be changed.

June 8, 2020 8-K

Financial Statements and Exhibits, Other Events

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 8, 2020 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

May 12, 2020 8-K

Current Report

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 6, 2020 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 F

May 8, 2020 10-Q

Quarterly Report - GREAT SOUTHERN BANCORP, INC. QUARTERLY REPORT ON FORM 10-Q FOR MARCH 31, 2020

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ACT OF 1934 For the Quarterly Period Ended March 31, 2020 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 0-18082 GREAT SOUTHERN BANCORP, INC. (Exact name of registrant as specified i

April 21, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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) April 20, 2020 GREAT SOUTHERN BANCORP, INC. (Exact name of Registrant as specified in its Charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

April 21, 2020 EX-99

Great Southern Bancorp, Inc. Reports Preliminary First Quarter Earnings of $1.04 Per Diluted Common Share

April 20, 2020 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, (417) 895-5242 kpolonus@greatsouthernbank.

April 20, 2020 8-K

Regulation FD Disclosure

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) April 20, 2020 GREAT SOUTHERN BANCORP, INC. (Exact name of Registrant as specified in its Charter) Maryland 0-18082 43-1524856 (State or other jurisdiction of incorporation) (Commissio

April 13, 2020 CORRESP

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SOUTHERN MISSOURI BANCORP, INC GREAT SOUTHERN BANCORP, INC. 1451 East Battlefield Springfield, Missouri 65804 April 13, 2020 Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Re:Great Southern Bancorp, Inc. Request for Acceleration of Effectiveness of Registration Statement on Form S-3 (File No. 333-237548) Ladies and Gentlemen: Pursuant to Rule 461 under the Securities

April 8, 2020 TEXT-EXTRACT

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April 8, 2020 Rex Copeland Treasurer Great Southern Bancorp, Inc. 1451 East Battlefield Springfield, Missouri 65804 Re: Great Southern Bancorp, Inc. Registration Statement on Form S-3 Filed April 2, 2020 File No. 333-237548 Dear Mr. Copeland: This is to advise you that we have not reviewed and will not review your registration statement. Please refer to Rules 460 and 461 regarding requests for acc

April 8, 2020 LETTER

LETTER

April 8, 2020 Rex Copeland Treasurer Great Southern Bancorp, Inc. 1451 East Battlefield Springfield, Missouri 65804 Re: Great Southern Bancorp, Inc. Registration Statement on Form S-3 Filed April 2, 2020 File No. 333-237548 Dear Mr. Copeland: This is to advise you that we have not reviewed and will not review your registration statement. Please refer to Rules 460 and 461 regarding requests for acc

April 2, 2020 EX-4

GREAT SOUTHERN BANCORP, INC. as Trustee Dated as of , 202_ SENIOR DEBT SECURITIES TABLE OF CONTENTS

Exhibit 4.3 GREAT SOUTHERN BANCORP, INC. TO as Trustee INDENTURE Dated as of , 202 SENIOR DEBT SECURITIES TABLE OF CONTENTS Page ARTICLE ONE DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION1 SECTION 101.Definitions.1 SECTION 102.Compliance Certificates and Opinions.7 SECTION 103.Form of Documents Delivered to Trustee.8 SECTION 104.Acts of Holders.8 SECTION 105.Notices, etc.9 SECTION 106.Not

April 2, 2020 COVER

Law Offices Silver, Freedman, Taff & Tiernan LLP A Limited Liability Partnership Including Professional Corporations 3299 K STREET, N.W., SUITE 100 WASHINGTON, D.C. 20007 (202) 295-4500 WWW.SFTTLAW.COM April 2, 2020

Law Offices Silver, Freedman, Taff & Tiernan LLP A Limited Liability Partnership Including Professional Corporations 3299 K STREET, N.

April 2, 2020 S-3

As filed with the Securities and Exchange Commission on April 2, 2020

As filed with the Securities and Exchange Commission on December 18, 2006 As filed with the Securities and Exchange Commission on April 2, 2020 Registration No.

April 2, 2020 EX-4

GREAT SOUTHERN BANCORP, INC. as Trustee Dated as of , 202__ SUBORDINATED DEBT SECURITIES TABLE OF CONTENTS

Exhibit 4.4 GREAT SOUTHERN BANCORP, INC. TO as Trustee INDENTURE Dated as of , 202 SUBORDINATED DEBT SECURITIES TABLE OF CONTENTS Page ARTICLE ONE DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION1 SECTION 101.Definitions.1 SECTION 102.Compliance Certificates and Opinions.8 SECTION 103.Form of Documents Delivered to Trustee.9 SECTION 104.Acts of Holders.9 SECTION 105.Notices, etc.10 SECTION

March 27, 2020 DEFA14A

GSBC / Great Southern Bancorp, Inc. DEFA14A - - ADDITIONAL PROXY SOLICITATION MATERIAL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.) Filed by the Registrant [X] Filed by a party other than the Registrant [ ] Check the appropriate box: [ ] Preliminary Proxy Statement [ ] Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

March 27, 2020 DEFA14A

GSBC / Great Southern Bancorp, Inc. DEFA14A - - ADDITIONAL PROXY SOLICITATION MATERIAL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.) Filed by the Registrant [X] Filed by a party other than the Registrant [ ] Check the appropriate box: [ ] Preliminary Proxy Statement [ ] Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

March 27, 2020 EX-99

Great Southern Bancorp, Inc. Announces Change in Format for its 31st Annual Meeting of Stockholders Meeting to be virtual-only due to COVID-19 pandemic

FOR MORE INFORMATION Exhibit 99.1 March 27, 2020 FOR IMMEDIATE RELEASE CONTACT: Kelly Polonus, Great Southern, 1.417.895.5242 [email protected] Great Southern Bancorp, Inc. Announces Change in Format for its 31st Annual Meeting of Stockholders Meeting to be virtual-only due to COVID-19 pandemic SPRINGFIELD, Mo. – Great Southern Bancorp, Inc. (NASDAQ:GSBC), the holding company for Grea

March 27, 2020 DEF 14A

Definitive Proxy Statement on Schedule 14A filed with the SEC on March 27, 2020

GREAT SOUTHERN BANCORP, INC UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

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