MBBC insider purchase: CEO adds 1,325 shares; options detailed

Rhea-AI Filing Summary

Marathon Bancorp (MBBC) reported an insider purchase by its President and CEO. On 11/13/2025, the reporting person bought 1,325 shares of common stock at $10.9999 per share. Following this trade, directly held shares totaled 33,728. Indirect holdings include 47,780 shares by a 401(k), 604 by an IRA, and 2,723 by an ESOP.

The filer also holds stock options: 29,994 at an exercise price of $8.1294 (exercisable beginning 06/28/2023, expiring 06/28/2032) and 7,498 at $6.4831 (exercisable beginning 05/16/2024, expiring 05/16/2033). Restricted stock and options vest at 20% per year on the stated schedules.

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^*

Zillges Nicholas W

(Last) (First) (Middle)

500 SCOTT STREET

(Street)

WAUSAU WI 54403

(City) (State) (Zip)

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
X	Officer (give title below)		Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
11/13/2025

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

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

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

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	11/13/2025		P		1,325	A	$10.9999	33,728(1)	D
Common Stock								47,780	I	By 401(k)
Common Stock								604	I	By IRA
Common Stock								2,723	I	By ESOP

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	$8.1294							06/28/2023	06/28/2032	Common Stock	29,994(2)		29,994(2)	D
Stock Options	$6.4831							05/16/2024	05/16/2033	Common Stock	7,498(3)		7,498(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	11/14/2025
	** 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.

FAQ

What insider transaction did MBBC report?

On 11/13/2025, the President and CEO purchased 1,325 MBBC common shares at $10.9999 each.

How many MBBC shares does the reporting person hold directly after the trade?

Directly held shares totaled 33,728 after the reported purchase.

What are the reporting person’s indirect MBBC holdings?

Indirect holdings include 47,780 shares by a 401(k), 604 by an IRA, and 2,723 by an ESOP.

What MBBC stock options are reported outstanding?

Options for 29,994 shares at $8.1294 (exp. 06/28/2032) and 7,498 at $6.4831 (exp. 05/16/2033).

What are the vesting terms on MBBC equity awards?

Restricted stock and reported stock options vest at 20% per year beginning on their respective start dates.

What roles does the reporting person hold at MBBC?

The individual is a Director and serves as President and CEO.