STOCK TITAN

Marathon Bancorp (NASDAQ: MBBC) CEO updates stock and option holdings in Form 4

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Marathon Bancorp, Inc. President and CEO Nicholas W. Zillges reported updated equity holdings in a Form 4. The only transaction was a Form F tax-withholding disposition of 1,269 shares of Common Stock at $15.49 per share, leaving 55,936 shares of Common Stock held directly.

He also holds Common Stock indirectly through an ESOP (4,429 shares), an IRA (604 shares), and a 401(k) plan (51,160 shares). In addition, he retains stock options over 42,335 shares at $14.55, 3,000 shares at $6.48, and 29,994 shares at $8.13, which vest 20% per year on stated schedules.

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Insider Zillges Nicholas W
Role President and CEO
Type Security Shares Price Value
Tax Withholding Common Stock 1,269 $15.49 $20K
holding Stock Options -- -- --
holding Stock Options -- -- --
holding Stock Options -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 55,936 shares (Direct, null); Stock Options — 29,994 shares (Direct, null); Common Stock — 51,160 shares (Indirect, By 401(k))
Footnotes (1)
  1. Includes shares of restricted stock which vest at a rate of 20% per year commencing on June 28, 2023. Includes shares of restricted stock which vest at a rate of 20% per year commencing on June 15, 2027. 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. Stock options vest at a rate of 20% per year commencing on June 15, 2027.
Tax-withholding shares 1,269 shares Common Stock disposed for tax at $15.49 per share
Direct common shares after transaction 55,936 shares Direct ownership of Common Stock following F-code disposition
ESOP holdings 4,429 shares Common Stock held indirectly by ESOP
401(k) holdings 51,160 shares Common Stock held indirectly by 401(k)
Options at $14.55 42,335 shares Stock options on Common Stock, exercise price $14.55, expiring 2036-06-15
Options at $6.48 3,000 shares Stock options on Common Stock, exercise price $6.48, expiring 2033-05-16
Options at $8.13 29,994 shares Stock options on Common Stock, exercise price $8.13, expiring 2032-06-28
tax-withholding disposition financial
"transaction_action: tax-withholding disposition"
A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.
Stock Options financial
"security_title: Stock Options"
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"
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.
ESOP financial
"nature_of_ownership: By ESOP"
An Employee Stock Ownership Plan (ESOP) is a program that gives employees ownership shares in their company, often as part of their benefits package. It acts like a company-sponsored savings plan, allowing workers to have a stake in the company's success, which can boost motivation and loyalty. For investors, ESOPs can influence company decisions and stock value, making them an important aspect of corporate ownership and governance.
IRA financial
"nature_of_ownership: By 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: By 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.
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SEC Form 4
FORM 4UNITED 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 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)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
President and CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/28/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock06/28/2026F1,269D$15.4955,936(1)(2)D
Common Stock51,160IBy 401(k)
Common Stock604IBy IRA
Common Stock4,429IBy 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Options$8.1306/28/202306/28/2032Common Stock29,994(3)29,994(3)D
Stock Options$6.4805/16/202405/16/2033Common Stock3,000(4)3,000(4)D
Stock Options$14.5506/15/202706/15/2036Common Stock42,335(5)42,335(5)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. Includes shares of restricted stock which vest at a rate of 20% per year commencing on June 15, 2027.
3. Stock options vest at a rate of 20% per year commencing on June 28, 2023.
4. Stock options vest at a rate of 20% per year commencing on May 16, 2024.
5. Stock options vest at a rate of 20% per year commencing on June 15, 2027.
/s/ Benjamin M. Azoff, pursuant to Power of Attorney06/30/2026
** Signature of Reporting PersonDate
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 MBBC CEO Nicholas Zillges report in this Form 4?

Nicholas W. Zillges reported updated equity holdings, including a tax-related disposition of 1,269 shares of Marathon Bancorp, Inc. common stock. The filing mainly reflects routine equity compensation and updated direct and indirect ownership rather than open-market buying or selling activity.

Was there an open-market sale of MBBC stock in this filing?

No open-market sale was reported. The only share movement was an F-code tax-withholding disposition of 1,269 shares at $15.49 per share, used to satisfy exercise price or tax obligations associated with equity compensation, not a discretionary market trade.

How many MBBC shares does the CEO hold directly after this Form 4?

After the tax-withholding disposition, Nicholas W. Zillges holds 55,936 shares of Marathon Bancorp, Inc. common stock directly. This figure represents his remaining direct non-derivative ownership position reported as of the transaction date in the Form 4 filing.

What indirect MBBC holdings does the CEO report?

The CEO reports indirect ownership through multiple accounts: 4,429 shares of common stock via an ESOP, 604 shares via an IRA, and 51,160 shares via a 401(k) plan. These positions reflect retirement and employee-benefit-related holdings rather than direct brokerage account ownership.

What stock options on MBBC shares does the CEO retain?

He retains stock options over 42,335 shares at a $14.55 exercise price, 3,000 shares at $6.48, and 29,994 shares at $8.13. These options vest at 20% per year starting on specified dates and expire between 2032 and 2036 if not exercised.

How are vesting schedules described for MBBC equity awards?

Footnotes state that certain restricted stock and stock options vest at a rate of 20% per year, with vesting starting on dates such as June 28, 2023, May 16, 2024, and June 15, 2027. This creates a gradual, multi-year vesting pattern for the CEO’s equity awards.