Southern Missouri Bancorp exec sells 2,685 shares

Southern Missouri Bancorp, Inc. (SMBC) executive Mark E. Hecker, EVP-Chief Credit Officer, reported open-market sales of a total of 2,685 shares of common stock on 2026-08-18 from IRA-related indirect holdings at prices around $75.49–$75.61.

Rhea-AI Filing Summary

Southern Missouri Bancorp, Inc. (SMBC) executive Mark E. Hecker, EVP-Chief Credit Officer, reported open-market sales of a total of 2,685 shares of common stock on 2026-08-18 from IRA-related indirect holdings at prices around $75.49–$75.61. These sales included 1,600 shares at $75.49, 900 shares at $75.61, and 185 shares at $75.51 from a Spouse IRA, after which that Spouse IRA position was reduced to 0 shares. Hecker continues to hold 10,065 shares directly and 2,052.402 shares indirectly through a 401(k), along with multiple outstanding stock option grants over various expiration dates and exercise prices, including options over 1,500 underlying shares at an exercise price of $62.96 expiring on 2036-02-24.

Insider Trade Summary

Net Seller: 2,685 shares

Net Sell 12 txns

Insider HECKER MARK E

Role EVP-CHIEF CREDIT OFFICER

Sold 2,685 shs ($203K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,600	$75.49	$121K
Sale	Common Stock	900	$75.61	$68K
Sale	Common Stock	185	$75.51	$14K
holding	Stock Option (Right to Buy) F1	--	--	--
holding	Stock Option (Right to Buy) F2	--	--	--
holding	Stock Option (Right to Buy) F3	--	--	--
holding	Stock Option (Right to Buy) F4	--	--	--
holding	Stock Option (Right to Buy) F5	--	--	--
holding	Stock Option (Right to Buy) F6	--	--	--
holding	Stock Option (Right to Buy) F7	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 8,130 shares (Indirect, IRA); Common Stock — 0 shares (Indirect, Spouse IRA); Stock Option (Right to Buy) — 14,500 contracts (Direct); Common Stock — 2,052.402 shares (Indirect, 401(k)); Common Stock — 10,065 shares (Direct)

Footnotes (7)

1. F1. The options become exercisable in 20% installments over a five year period with the first installment vesting on 2/24/27. Each remaining installment vests annually thereafter.
2. F2. The options become exercisable in 20% installments over a five year period with the first installment vesting on 2/18/26. Each remaining installment vests annually thereafter.
3. F3. The options become exercisable in 20% installments over a five-year period with the first installment vesting on 2/8/25. Each remaining installment vests annually thereafter.
4. F4. The options become exercisable in 20% installments over a five-year period with the first installment vesting on 2/21/24. Each remaining installment vests annually thereafter.
5. F5. The options become exercisable in 20% installments over a five year period with the first installment vesting on 2/3/23. Each remaining installment vests annually thereafter.
6. F6. The options become exercisable in 20% installments over a five year period with the first installment vesting on 2/10/22. Each remaining installment vests annually thereafter.
7. F7. The options become exercisable in 20% installments over a five year period with the first installment vesting on 2/18/21. Each remaining installment vests annually thereafter.

Key Figures

Shares sold (total): 2,685 shares Sale price 1: $75.49 per share Sale price 2: $75.61 per share +5 more

8 metrics

Shares sold (total) 2,685 shares Common Stock sales on 2026-08-18 from IRA-related indirect holdings

Sale price 1 $75.49 per share Sale of 1,600 Common Stock shares on 2026-08-18

Sale price 2 $75.61 per share Sale of 900 Common Stock shares on 2026-08-18

Sale price 3 $75.51 per share Sale of 185 Common Stock shares from Spouse IRA on 2026-08-18

Direct common shares held 10,065 shares Direct ownership of SMBC Common Stock following reported transactions

401(k) common shares held 2,052.402 shares Indirect ownership of SMBC Common Stock through 401(k)

Option exercise price $62.96 per share Stock Option (Right to Buy) over 1,500 underlying SMBC shares expiring 2036-02-24

Option underlying shares 1,500 shares Underlying Common Stock for option at $62.96 expiring 2036-02-24

Key Terms

Stock Option (Right to Buy), IRA, 401(k), underlying security title

4 terms

Stock Option (Right to Buy) financial

"security_title: "Stock Option (Right to Buy)""

IRA financial

"nature_of_ownership: "IRA""

An individual retirement account (IRA) is a savings account designed to help people put aside money for their retirement, often with tax advantages that encourage long-term savings. It matters to investors because it can grow over time, providing financial security later in life, and offers benefits that can reduce current taxes or allow investments to compound more effectively.

401(k) financial

"nature_of_ownership: "401(k)""

A 401(k) is a type of retirement savings plan offered by employers that allows workers to set aside a portion of their paycheck before taxes are taken out. The money saved in a 401(k) can grow over time through investments, helping individuals build funds for their future retirement. It matters to investors because it provides a tax-advantaged way to save and invest for long-term financial security.

underlying security title financial

"underlying_security_title: "Common Stock""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did SMBC executive Mark E. Hecker report on this Form 4?

Mark E. Hecker reported sales of 2,685 SMBC common shares on 2026-08-18 from IRA-related indirect accounts. The trades were reported as open-market or private transactions at prices around $75.49–$75.61, affecting IRA and Spouse IRA holdings.

At what prices were the SMBC shares sold by Mark E. Hecker?

Hecker’s reported SMBC share sales occurred at $75.49, $75.61, and $75.51 per share on 2026-08-18. These transactions were disclosed as open-market or private sales of common stock held indirectly through IRA-related accounts.

How many SMBC shares did Mark E. Hecker sell from each account?

Hecker reported selling 1,600 SMBC shares at $75.49 and 900 shares at $75.61 from an IRA, plus 185 shares at $75.51 from a Spouse IRA. The Spouse IRA position was reported as reduced to 0 shares after the sale.

What SMBC share holdings does Mark E. Hecker report after these transactions?

After these transactions, Hecker reports 10,065 SMBC common shares held directly and 2,052.402 shares held indirectly through a 401(k) plan. The filing also shows that the Spouse IRA position in common stock was reduced to zero shares.

What SMBC stock options does Mark E. Hecker currently hold according to this Form 4?

Hecker reports several Stock Option (Right to Buy) positions over SMBC common stock, including options on 1,500 underlying shares at an exercise price of $62.96 expiring 2036-02-24, with additional grants at other exercise prices and expirations through 2030–2035.

Are the reported SMBC sales by Mark E. Hecker made under a Rule 10b5-1 plan?

The filing’s Rule 10b5-1 checkbox is not marked as affirmative, and no footnote states that these trades were executed under a Rule 10b5-1 trading plan. The transactions are disclosed simply as open-market or private sales.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 08/20/2026 - 03:07 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

HECKER MARK E

(Last) (First) (Middle)

2991 OAK GROVE RD.

(Street)

POPLAR BLUFF MISSOURI 63901

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SOUTHERN MISSOURI BANCORP, INC. [ SMBC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP-CHIEF CREDIT OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/18/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/18/2026		S		1,600	D	$75.49	9,030	I	IRA
Common Stock	08/18/2026		S		900	D	$75.61	8,130	I	IRA
Common Stock	08/18/2026		S		185	D	$75.51	0	I	Spouse IRA
Common Stock								2,052.402	I	401(k)
Common Stock								10,065	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$62.96							(1)	02/24/2036	Common Stock	1,500		1,500	D
Stock Option (Right to Buy)	$60.42							(2)	02/18/2035	Common Stock	1,500		1,500	D
Stock Option (Right to Buy)	$40.82							(3)	02/08/2034	Common Stock	2,500		2,500	D
Stock Option (Right to Buy)	$46.94							(4)	02/21/2033	Common Stock	2,500		2,500	D
Stock Option (Right to Buy)	$53.82							(5)	02/03/2032	Common Stock	1,500		1,500	D
Stock Option (Right to Buy)	$34.91							(6)	02/10/2031	Common Stock	3,000		3,000	D
Stock Option (Right to Buy)	$37.4							(7)	02/18/2030	Common Stock	2,000		2,000	D

Explanation of Responses:

1. The options become exercisable in 20% installments over a five year period with the first installment vesting on 2/24/27. Each remaining installment vests annually thereafter.

2. The options become exercisable in 20% installments over a five year period with the first installment vesting on 2/18/26. Each remaining installment vests annually thereafter.

3. The options become exercisable in 20% installments over a five-year period with the first installment vesting on 2/8/25. Each remaining installment vests annually thereafter.

4. The options become exercisable in 20% installments over a five-year period with the first installment vesting on 2/21/24. Each remaining installment vests annually thereafter.

5. The options become exercisable in 20% installments over a five year period with the first installment vesting on 2/3/23. Each remaining installment vests annually thereafter.

6. The options become exercisable in 20% installments over a five year period with the first installment vesting on 2/10/22. Each remaining installment vests annually thereafter.

7. The options become exercisable in 20% installments over a five year period with the first installment vesting on 2/18/21. Each remaining installment vests annually thereafter.

	/s/ Mark E Hecker	08/20/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)