Marathon Bancorp (MBBC) chair exercises stock options for shares

Rhea-AI Filing Summary

Marathon Bancorp director Amy Zientara exercised stock options to acquire additional common shares. On June 3, 2026 she exercised options for 899 shares at $6.48 per share and 3,599 shares at $8.13 per share, totaling 4,498 newly acquired shares.

The related derivative entries show these transactions were option exercises, not open-market purchases or sales. Footnotes indicate both her restricted stock and stock options vest at a rate of 20% per year starting in 2023 and 2024, highlighting that these awards are part of ongoing equity compensation.

Insider Trade Summary

4,498 shares exercised/converted

Mixed 4 txns

Insider Zientara Amy

Role null

Type	Security	Shares	Price	Value
Exercise	Stock Options	3,599	$0.00	--
Exercise	Stock Options	899	$0.00	--
Exercise	Common Stock	3,599	$8.13	$29K
Exercise	Common Stock	899	$6.48	$6K

Holdings After Transaction: Stock Options — 2,400 shares (Direct, null); Common Stock — 22,825 shares (Direct, null)

Footnotes (1)

1. Includes shares of restricted stock which vest at a rate of 20% per year commencing on June 28, 2023. Stock options vest at a rate of 20% per year commencing on June 28, 2023. Stock options vest at a rate of 20% per year commencing on May 16, 2024.

Key Figures

Options exercised at $6.48: 899 shares at $6.48 Options exercised at $8.13: 3,599 shares at $8.13 Total shares from exercises: 4,498 shares +2 more

5 metrics

Options exercised at $6.48 899 shares at $6.48 Common stock acquired via option exercise on June 3, 2026

Options exercised at $8.13 3,599 shares at $8.13 Common stock acquired via option exercise on June 3, 2026

Total shares from exercises 4,498 shares Aggregate common shares from option exercises (exerciseShares)

Remaining options series 2033 600 options Stock options expiring May 16, 2033 after 899 exercised

Remaining options series 2032 2,400 options Stock options expiring June 28, 2032 after 3,599 exercised

Key Terms

stock options, restricted stock, Exercise or conversion of derivative security, derivative security

4 terms

stock options financial

"Stock options vest at a rate of 20% per year commencing on June 28, 2023."

Stock options are agreements that give a person the right to buy or sell a company's stock at a specific price within a certain time frame. They are often used as a reward or incentive, similar to a coupon that can be used later if the stock price rises, allowing the holder to make a profit.

restricted stock financial

"Includes shares of restricted stock which vest at a rate of 20% per year commencing on June 28, 2023."

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Exercise or conversion of derivative security financial

"transaction_code_description: Exercise or conversion of derivative security"

derivative security financial

"transaction_type: derivative; transaction_code_description: Exercise or conversion of derivative security"

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

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Form 4 Insider Transactions: What Each Field Means →

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^*

Zientara Amy

(Last) (First) (Middle)

500 SCOTT STREET

(Street)

WAUSAU WISCONSIN 54403

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Marathon Bancorp, Inc. /MD/ [ MBBC ]

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

X	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			Chairwoman of the Board

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/03/2026

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	06/03/2026		M		3,599	A	$8.13	22,825(1)	D
Common Stock	06/03/2026		M		899	A	$6.48	23,724(1)	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 Options	$8.13	06/03/2026		M			3,599	06/28/2023	06/28/2032	Common Stock	3,599(2)	$0	2,400(2)	D
Stock Options	$6.48	06/03/2026		M			899	05/16/2024	05/16/2033	Common Stock	899(3)	$0	600(3)	D

Explanation of Responses:

1. Includes shares of restricted stock which vest at a rate of 20% per year commencing on June 28, 2023.

2. Stock options vest at a rate of 20% per year commencing on June 28, 2023.

3. Stock options vest at a rate of 20% per year commencing on May 16, 2024.

	/s/ Benjamin Azoff, pursuant to power of attorney	06/05/2026
	** 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)

FAQ

What did Marathon Bancorp (MBBC) director Amy Zientara report in this Form 4?

Amy Zientara reported exercising stock options to acquire common shares of Marathon Bancorp. She exercised options covering 4,498 shares on June 3, 2026, converting previously granted options into directly held common stock as part of her equity compensation.

How many Marathon Bancorp (MBBC) shares did Amy Zientara acquire and at what prices?

Amy Zientara acquired 4,498 common shares through option exercises. She exercised options for 899 shares at $6.48 per share and 3,599 shares at $8.13 per share, turning those derivative awards into Marathon Bancorp common stock holdings.

Did Amy Zientara sell any Marathon Bancorp (MBBC) shares in this Form 4 filing?

No shares were sold in this filing. All reported transactions are coded “M,” indicating exercises or conversions of derivative securities. The filing shows option exercises that increased her common stock ownership, with no reported open-market sales or other dispositions.

What do the vesting footnotes in Amy Zientara’s Marathon Bancorp (MBBC) Form 4 mean?

The footnotes explain that her restricted stock and stock options vest 20% per year starting June 28, 2023 and May 16, 2024. This means her equity awards become exercisable or unrestricted gradually over several years, reflecting a long-term compensation structure.

Are Amy Zientara’s option exercises at Marathon Bancorp (MBBC) part of a compensation plan?

Yes, the transactions reflect equity compensation. The Form 4 shows stock options being exercised, and footnotes describe multi-year vesting schedules. This pattern is typical of director or executive compensation programs that grant options and restricted stock vesting over time.