STOCK TITAN

Director Wimmer (NASDAQ: MBBC) exercises stock options and increases Marathon Bancorp share holdings

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

Rhea-AI Filing Summary

Marathon Bancorp director Timothy R. Wimmer exercised stock options to acquire additional common shares on June 3, 2026. He exercised options for 899 shares of common stock at a conversion price of $6.48 per share and 3,599 shares at $8.13 per share, with the resulting common stock held indirectly by trusts.

Following these transactions, Wimmer holds 2,998 common shares directly, and indirect trust holdings reported total 13,862 and 12,963 common shares in separate entries. His remaining stock options after the exercises were 600 and 2,400 options in two series that vest 20% per year beginning in 2023 and 2024.

Positive

  • None.

Negative

  • None.
Insider Wimmer Timothy R
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
holding Common Stock -- -- --
Holdings After Transaction: Stock Options — 2,400 shares (Direct, null); Common Stock — 12,963 shares (Indirect, By Trust); Common Stock — 2,998 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.
Options exercised at $6.48 899 shares Common stock acquired via option exercise at $6.48 on June 3, 2026
Options exercised at $8.13 3,599 shares Common stock acquired via option exercise at $8.13 on June 3, 2026
Direct common shares after transactions 2,998 shares Directly held Marathon Bancorp common stock following June 3, 2026 transactions
Indirect trust holding A 13,862 shares Common stock held indirectly by trust after June 3, 2026
Indirect trust holding B 12,963 shares Additional common stock held indirectly by trust after June 3, 2026
Remaining stock options grant 1 600 options Options with 20% annual vesting commencing June 28, 2023
Remaining stock options grant 2 2,400 options Options with 20% annual vesting commencing May 16, 2024
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.
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.
derivative security financial
"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.
By Trust financial
"Common Stock reported with nature of ownership noted as By Trust"
indirect ownership financial
"ownership_type marked as indirect where shares are held By Trust"
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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*
Wimmer Timothy R

(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
Officer (give title below)Other (specify below)
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 Stock06/03/2026M3,599A$8.1312,963IBy Trust
Common Stock06/03/2026M899A$6.4813,862IBy Trust
Common Stock2,998(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Options$8.1306/03/2026M3,59906/28/202306/28/2032Common Stock3,599(2)$02,400(2)D
Stock Options$6.4806/03/2026M89905/16/202405/16/2033Common Stock899(3)$0600(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 attorney06/05/2026
** 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 Timothy R. Wimmer do in this Form 4 for MBBC?

Timothy R. Wimmer exercised stock options to acquire additional Marathon Bancorp common shares. He converted two option grants into 4,498 common shares, which are reported as being held indirectly by trusts and directly in his own account after the transactions.

How many Marathon Bancorp shares did Wimmer acquire through option exercises?

Wimmer exercised options for 4,498 Marathon Bancorp common shares. This consisted of 899 shares at a conversion price of $6.48 per share and 3,599 shares at a conversion price of $8.13 per share, both reported as derivative exercises on June 3, 2026.

What are Timothy R. Wimmer’s reported Marathon Bancorp share holdings after the transactions?

After the transactions, Wimmer holds 2,998 Marathon Bancorp common shares directly. Indirectly, through trusts, the filing reports 13,862 common shares in one entry and 12,963 common shares in another, reflecting positions following the June 3, 2026 option exercises.

What stock option positions does Wimmer retain after exercising options in MBBC?

After exercising options, Wimmer retains 600 stock options from one grant and 2,400 stock options from another. Footnotes state both option grants vest at 20% per year, with vesting schedules commencing on June 28, 2023 and May 16, 2024, respectively.

At what prices were Wimmer’s Marathon Bancorp options exercised?

The filing shows Wimmer exercised options with conversion prices of $6.48 and $8.13 per share. These prices apply to option grants that produced 899 and 3,599 common shares respectively when exercised, all reported as derivative exercises on June 3, 2026.

How are Wimmer’s indirect Marathon Bancorp holdings structured in this Form 4?

Indirect holdings are reported as "By Trust" in the filing. Two separate common stock entries show 13,862 and 12,963 shares held by trusts after the exercises, indicating the acquired shares are attributed to trust ownership rather than being held directly in his personal account.