STOCK TITAN

Marathon Bancorp (MBBC) CEO adds 1,076 common shares to 401(k) holdings

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

Rhea-AI Filing Summary

Marathon Bancorp President and CEO Nicholas W. Zillges reported a series of open-market purchases of common stock through his 401(k) account. Between early and mid-June 2026, he bought a total of 1,076 shares at weighted-average prices ranging from about $13.66 to $14.75 per share, bringing his 401(k) holdings to 51,160 shares.

He also reports indirect holdings of 4,429 shares through an ESOP and 604 shares through an IRA, plus 39,301 shares held directly. In addition, he holds stock options on 29,994 shares at an exercise price of $8.13 expiring in 2032 and options on 3,000 shares at $6.48 expiring in 2033, both vesting 20% per year from their respective commencement dates.

Positive

  • None.

Negative

  • None.
Insider Zillges Nicholas W
Role President and CEO
Bought 1,076 shs ($15K)
Type Security Shares Price Value
Purchase Common Stock 170 $14.75 $3K
Purchase Common Stock 537 $14.50 $8K
Purchase Common Stock 55 $14.241 $783.26
Purchase Common Stock 90 $14.2481 $1K
Purchase Common Stock 21 $13.7678 $289.12
Purchase Common Stock 203 $13.748 $3K
holding Stock Options -- -- --
holding Stock Options -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 51,160 shares (Indirect, By 401(k)); Stock Options — 29,994 shares (Direct, null); Common Stock — 39,301 shares (Direct, null)
Footnotes (1)
  1. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.655 to $13.75, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.75 to $14.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (2) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $14.00 to $14.25, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (3) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $14.18 to $14.25, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (4) to this Form 4. 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.
Total shares purchased 1,076 shares Net open-market buys in June 2026
Highest reported purchase price $14.75 per share Common stock purchase on June 10, 2026
401(k) holdings after purchases 51,160 shares Common stock held indirectly by 401(k) after June 10, 2026
Direct common stock holdings 39,301 shares Direct ownership as of June 3, 2026
ESOP holdings 4,429 shares Common stock held indirectly by ESOP as of June 3, 2026
IRA holdings 604 shares Common stock held indirectly by IRA as of June 3, 2026
Options at $8.13 29,994 underlying shares Stock options, exercise price $8.13, expiring June 28, 2032
Options at $6.48 3,000 underlying shares Stock options, exercise price $6.48, expiring May 16, 2033
401(k) financial
"indirect ownership noted as "By 401(k)" for multiple purchases"
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.
ESOP financial
"indirect ownership entry described as "By ESOP" holding common stock"
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
"indirect ownership entry described as "By IRA" holding common stock"
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.
Stock Options financial
"security title listed as "Stock Options" with exercise prices and expirations"
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
"footnote states "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.
weighted average price financial
"footnotes explain "The price reported in Column 4 is a weighted average price""
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
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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)
06/03/2026
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 Stock06/03/2026P203A$13.748(1)50,287IBy 401(k)
Common Stock06/04/2026P21A$13.7678(2)50,308IBy 401(k)
Common Stock06/05/2026P90A$14.2481(3)50,398IBy 401(k)
Common Stock06/08/2026P55A$14.241(4)50,453IBy 401(k)
Common Stock06/09/2026P537A$14.550,990IBy 401(k)
Common Stock06/10/2026P170A$14.7551,160IBy 401(k)
Common Stock39,301(5)D
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(6)29,994(6)D
Stock Options$6.4805/16/202405/16/2033Common Stock3,000(7)3,000(7)D
Explanation of Responses:
1. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.655 to $13.75, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4.
2. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.75 to $14.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (2) to this Form 4.
3. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $14.00 to $14.25, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (3) to this Form 4.
4. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $14.18 to $14.25, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (4) to this Form 4.
5. Includes shares of restricted stock which vest at a rate of 20% per year commencing on June 28, 2023.
6. Stock options vest at a rate of 20% per year commencing on June 28, 2023.
7. Stock options vest at a rate of 20% per year commencing on May 16, 2024.
/s/ Benjamin Azoff, pursuant to power of attorney06/11/2026
** 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 Marathon Bancorp (MBBC) CEO Nicholas Zillges report in this Form 4?

Nicholas W. Zillges reported multiple open-market purchases of Marathon Bancorp common stock through his 401(k). Over several days in June 2026, he accumulated 1,076 additional shares, increasing his indirect retirement-plan ownership while making no reported sales in this filing.

How many Marathon Bancorp (MBBC) shares did the CEO buy and at what prices?

The CEO bought 1,076 Marathon Bancorp common shares in total. Purchases occurred at weighted-average prices within ranges from about $13.655 to $14.75 per share, reflecting several small transactions rather than one large block trade across those trading days.

How many Marathon Bancorp (MBBC) shares does the CEO hold after these transactions?

After these transactions, the CEO’s 401(k) holds 51,160 Marathon Bancorp shares. He also reports 39,301 shares held directly, plus additional indirect holdings through an ESOP and an IRA, giving him a sizable combined equity position according to this Form 4 snapshot.

Were there any Marathon Bancorp (MBBC) share sales or only purchases in this Form 4?

This Form 4 shows only purchases of Marathon Bancorp common stock. The transaction summary indicates six buy transactions totaling 1,076 shares and no reported sales, gifts, tax withholdings, or other dispositions during the period covered by the filing.

What stock options in Marathon Bancorp (MBBC) does the CEO report holding?

The CEO reports stock options on 29,994 Marathon Bancorp shares at an $8.13 exercise price expiring in 2032 and options on 3,000 shares at $6.48 expiring in 2033. Both option grants vest at 20% per year starting from their respective commencement dates.

How are the CEO’s Marathon Bancorp (MBBC) purchases structured across his accounts?

The new purchases were made through his 401(k) account, raising those holdings to 51,160 shares. Separate holding entries show additional indirect ownership via an ESOP and an IRA, along with directly owned common shares and unexercised stock options reported in this filing.